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Diffstat (limited to 'src/mongoose.c')
| -rw-r--r-- | src/mongoose.c | 16487 |
1 files changed, 16487 insertions, 0 deletions
diff --git a/src/mongoose.c b/src/mongoose.c new file mode 100644 index 0000000..7f7aad3 --- /dev/null +++ b/src/mongoose.c @@ -0,0 +1,16487 @@ +#include "mongoose.h" +#ifdef MG_MODULE_LINES +#line 1 "mongoose/src/internal.h" +#endif +/* + * Copyright (c) 2014 Cesanta Software Limited + * All rights reserved + */ + +#ifndef CS_MONGOOSE_SRC_INTERNAL_H_ +#define CS_MONGOOSE_SRC_INTERNAL_H_ + +/* Amalgamated: #include "common/mg_mem.h" */ + +#ifndef MBUF_REALLOC +#define MBUF_REALLOC MG_REALLOC +#endif + +#ifndef MBUF_FREE +#define MBUF_FREE MG_FREE +#endif + +#define MG_SET_PTRPTR(_ptr, _v) \ + do { \ + if (_ptr) *(_ptr) = _v; \ + } while (0) + +#ifndef MG_INTERNAL +#define MG_INTERNAL static +#endif + +#ifdef PICOTCP +#define NO_LIBC +#define MG_DISABLE_PFS +#endif + +/* Amalgamated: #include "common/cs_dbg.h" */ +/* Amalgamated: #include "mongoose/src/http.h" */ +/* Amalgamated: #include "mongoose/src/net.h" */ + +#define MG_CTL_MSG_MESSAGE_SIZE 8192 + +/* internals that need to be accessible in unit tests */ +MG_INTERNAL struct mg_connection *mg_do_connect(struct mg_connection *nc, + int proto, + union socket_address *sa); + +MG_INTERNAL int mg_parse_address(const char *str, union socket_address *sa, + int *proto, char *host, size_t host_len); +MG_INTERNAL void mg_call(struct mg_connection *nc, + mg_event_handler_t ev_handler, void *user_data, int ev, + void *ev_data); +void mg_forward(struct mg_connection *from, struct mg_connection *to); +MG_INTERNAL void mg_add_conn(struct mg_mgr *mgr, struct mg_connection *c); +MG_INTERNAL void mg_remove_conn(struct mg_connection *c); +MG_INTERNAL struct mg_connection *mg_create_connection( + struct mg_mgr *mgr, mg_event_handler_t callback, + struct mg_add_sock_opts opts); +#ifdef _WIN32 +/* Retur value is the same as for MultiByteToWideChar. */ +int to_wchar(const char *path, wchar_t *wbuf, size_t wbuf_len); +#endif + +struct ctl_msg { + mg_event_handler_t callback; + char message[MG_CTL_MSG_MESSAGE_SIZE]; +}; + +#if MG_ENABLE_MQTT +struct mg_mqtt_message; + +#define MG_MQTT_ERROR_INCOMPLETE_MSG -1 +#define MG_MQTT_ERROR_MALFORMED_MSG -2 + +MG_INTERNAL int parse_mqtt(struct mbuf *io, struct mg_mqtt_message *mm); +#endif + +/* Forward declarations for testing. */ +extern void *(*test_malloc)(size_t size); +extern void *(*test_calloc)(size_t count, size_t size); + +#ifndef MIN +#define MIN(a, b) ((a) < (b) ? (a) : (b)) +#endif + +#if MG_ENABLE_HTTP +struct mg_serve_http_opts; + +/* + * Reassemble the content of the buffer (buf, blen) which should be + * in the HTTP chunked encoding, by collapsing data chunks to the + * beginning of the buffer. + * + * If chunks get reassembled, modify hm->body to point to the reassembled + * body and fire MG_EV_HTTP_CHUNK event. If handler sets MG_F_DELETE_CHUNK + * in nc->flags, delete reassembled body from the mbuf. + * + * Return reassembled body size. + */ +MG_INTERNAL size_t mg_handle_chunked(struct mg_connection *nc, + struct http_message *hm, char *buf, + size_t blen); + +#if MG_ENABLE_FILESYSTEM +MG_INTERNAL int mg_uri_to_local_path(struct http_message *hm, + const struct mg_serve_http_opts *opts, + char **local_path, + struct mg_str *remainder); +MG_INTERNAL time_t mg_parse_date_string(const char *datetime); +MG_INTERNAL int mg_is_not_modified(struct http_message *hm, cs_stat_t *st); +#endif +#if MG_ENABLE_HTTP_CGI +MG_INTERNAL void mg_handle_cgi(struct mg_connection *nc, const char *prog, + const struct mg_str *path_info, + const struct http_message *hm, + const struct mg_serve_http_opts *opts); +struct mg_http_proto_data_cgi; +MG_INTERNAL void mg_http_free_proto_data_cgi(struct mg_http_proto_data_cgi *d); +#endif +#if MG_ENABLE_HTTP_SSI +MG_INTERNAL void mg_handle_ssi_request(struct mg_connection *nc, + struct http_message *hm, + const char *path, + const struct mg_serve_http_opts *opts); +#endif +#if MG_ENABLE_HTTP_WEBDAV +MG_INTERNAL int mg_is_dav_request(const struct mg_str *s); +MG_INTERNAL void mg_handle_propfind(struct mg_connection *nc, const char *path, + cs_stat_t *stp, struct http_message *hm, + struct mg_serve_http_opts *opts); +MG_INTERNAL void mg_handle_lock(struct mg_connection *nc, const char *path); +MG_INTERNAL void mg_handle_mkcol(struct mg_connection *nc, const char *path, + struct http_message *hm); +MG_INTERNAL void mg_handle_move(struct mg_connection *c, + const struct mg_serve_http_opts *opts, + const char *path, struct http_message *hm); +MG_INTERNAL void mg_handle_delete(struct mg_connection *nc, + const struct mg_serve_http_opts *opts, + const char *path); +MG_INTERNAL void mg_handle_put(struct mg_connection *nc, const char *path, + struct http_message *hm); +#endif +#if MG_ENABLE_HTTP_WEBSOCKET +MG_INTERNAL void mg_ws_handler(struct mg_connection *nc, int ev, + void *ev_data MG_UD_ARG(void *user_data)); +MG_INTERNAL void mg_ws_handshake(struct mg_connection *nc, + const struct mg_str *key, + struct http_message *); +#endif +#endif /* MG_ENABLE_HTTP */ + +MG_INTERNAL int mg_get_errno(void); + +MG_INTERNAL void mg_close_conn(struct mg_connection *conn); + +#if MG_ENABLE_SNTP +MG_INTERNAL int mg_sntp_parse_reply(const char *buf, int len, + struct mg_sntp_message *msg); +#endif + +#endif /* CS_MONGOOSE_SRC_INTERNAL_H_ */ +#ifdef MG_MODULE_LINES +#line 1 "common/mg_mem.h" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +#ifndef CS_COMMON_MG_MEM_H_ +#define CS_COMMON_MG_MEM_H_ + +#ifdef __cplusplus +extern "C" { +#endif + +#ifndef MG_MALLOC +#define MG_MALLOC malloc +#endif + +#ifndef MG_CALLOC +#define MG_CALLOC calloc +#endif + +#ifndef MG_REALLOC +#define MG_REALLOC realloc +#endif + +#ifndef MG_FREE +#define MG_FREE free +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* CS_COMMON_MG_MEM_H_ */ +#ifdef MG_MODULE_LINES +#line 1 "common/cs_base64.c" +#endif +/* + * Copyright (c) 2014 Cesanta Software Limited + * All rights reserved + */ + +#ifndef EXCLUDE_COMMON + +/* Amalgamated: #include "common/cs_base64.h" */ + +#include <string.h> + +/* Amalgamated: #include "common/cs_dbg.h" */ + +/* ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/ */ + +#define NUM_UPPERCASES ('Z' - 'A' + 1) +#define NUM_LETTERS (NUM_UPPERCASES * 2) +#define NUM_DIGITS ('9' - '0' + 1) + +/* + * Emit a base64 code char. + * + * Doesn't use memory, thus it's safe to use to safely dump memory in crashdumps + */ +static void cs_base64_emit_code(struct cs_base64_ctx *ctx, int v) { + if (v < NUM_UPPERCASES) { + ctx->b64_putc(v + 'A', ctx->user_data); + } else if (v < (NUM_LETTERS)) { + ctx->b64_putc(v - NUM_UPPERCASES + 'a', ctx->user_data); + } else if (v < (NUM_LETTERS + NUM_DIGITS)) { + ctx->b64_putc(v - NUM_LETTERS + '0', ctx->user_data); + } else { + ctx->b64_putc(v - NUM_LETTERS - NUM_DIGITS == 0 ? '+' : '/', + ctx->user_data); + } +} + +static void cs_base64_emit_chunk(struct cs_base64_ctx *ctx) { + int a, b, c; + + a = ctx->chunk[0]; + b = ctx->chunk[1]; + c = ctx->chunk[2]; + + cs_base64_emit_code(ctx, a >> 2); + cs_base64_emit_code(ctx, ((a & 3) << 4) | (b >> 4)); + if (ctx->chunk_size > 1) { + cs_base64_emit_code(ctx, (b & 15) << 2 | (c >> 6)); + } + if (ctx->chunk_size > 2) { + cs_base64_emit_code(ctx, c & 63); + } +} + +void cs_base64_init(struct cs_base64_ctx *ctx, cs_base64_putc_t b64_putc, + void *user_data) { + ctx->chunk_size = 0; + ctx->b64_putc = b64_putc; + ctx->user_data = user_data; +} + +void cs_base64_update(struct cs_base64_ctx *ctx, const char *str, size_t len) { + const unsigned char *src = (const unsigned char *) str; + size_t i; + for (i = 0; i < len; i++) { + ctx->chunk[ctx->chunk_size++] = src[i]; + if (ctx->chunk_size == 3) { + cs_base64_emit_chunk(ctx); + ctx->chunk_size = 0; + } + } +} + +void cs_base64_finish(struct cs_base64_ctx *ctx) { + if (ctx->chunk_size > 0) { + int i; + memset(&ctx->chunk[ctx->chunk_size], 0, 3 - ctx->chunk_size); + cs_base64_emit_chunk(ctx); + for (i = 0; i < (3 - ctx->chunk_size); i++) { + ctx->b64_putc('=', ctx->user_data); + } + } +} + +#define BASE64_ENCODE_BODY \ + static const char *b64 = \ + "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; \ + int i, j, a, b, c; \ + \ + for (i = j = 0; i < src_len; i += 3) { \ + a = src[i]; \ + b = i + 1 >= src_len ? 0 : src[i + 1]; \ + c = i + 2 >= src_len ? 0 : src[i + 2]; \ + \ + BASE64_OUT(b64[a >> 2]); \ + BASE64_OUT(b64[((a & 3) << 4) | (b >> 4)]); \ + if (i + 1 < src_len) { \ + BASE64_OUT(b64[(b & 15) << 2 | (c >> 6)]); \ + } \ + if (i + 2 < src_len) { \ + BASE64_OUT(b64[c & 63]); \ + } \ + } \ + \ + while (j % 4 != 0) { \ + BASE64_OUT('='); \ + } \ + BASE64_FLUSH() + +#define BASE64_OUT(ch) \ + do { \ + dst[j++] = (ch); \ + } while (0) + +#define BASE64_FLUSH() \ + do { \ + dst[j++] = '\0'; \ + } while (0) + +void cs_base64_encode(const unsigned char *src, int src_len, char *dst) { + BASE64_ENCODE_BODY; +} + +#undef BASE64_OUT +#undef BASE64_FLUSH + +#if CS_ENABLE_STDIO +#define BASE64_OUT(ch) \ + do { \ + fprintf(f, "%c", (ch)); \ + j++; \ + } while (0) + +#define BASE64_FLUSH() + +void cs_fprint_base64(FILE *f, const unsigned char *src, int src_len) { + BASE64_ENCODE_BODY; +} + +#undef BASE64_OUT +#undef BASE64_FLUSH +#endif /* CS_ENABLE_STDIO */ + +/* Convert one byte of encoded base64 input stream to 6-bit chunk */ +static unsigned char from_b64(unsigned char ch) { + /* Inverse lookup map */ + static const unsigned char tab[128] = { + 255, 255, 255, 255, + 255, 255, 255, 255, /* 0 */ + 255, 255, 255, 255, + 255, 255, 255, 255, /* 8 */ + 255, 255, 255, 255, + 255, 255, 255, 255, /* 16 */ + 255, 255, 255, 255, + 255, 255, 255, 255, /* 24 */ + 255, 255, 255, 255, + 255, 255, 255, 255, /* 32 */ + 255, 255, 255, 62, + 255, 255, 255, 63, /* 40 */ + 52, 53, 54, 55, + 56, 57, 58, 59, /* 48 */ + 60, 61, 255, 255, + 255, 200, 255, 255, /* 56 '=' is 200, on index 61 */ + 255, 0, 1, 2, + 3, 4, 5, 6, /* 64 */ + 7, 8, 9, 10, + 11, 12, 13, 14, /* 72 */ + 15, 16, 17, 18, + 19, 20, 21, 22, /* 80 */ + 23, 24, 25, 255, + 255, 255, 255, 255, /* 88 */ + 255, 26, 27, 28, + 29, 30, 31, 32, /* 96 */ + 33, 34, 35, 36, + 37, 38, 39, 40, /* 104 */ + 41, 42, 43, 44, + 45, 46, 47, 48, /* 112 */ + 49, 50, 51, 255, + 255, 255, 255, 255, /* 120 */ + }; + return tab[ch & 127]; +} + +int cs_base64_decode(const unsigned char *s, int len, char *dst, int *dec_len) { + unsigned char a, b, c, d; + int orig_len = len; + char *orig_dst = dst; + while (len >= 4 && (a = from_b64(s[0])) != 255 && + (b = from_b64(s[1])) != 255 && (c = from_b64(s[2])) != 255 && + (d = from_b64(s[3])) != 255) { + s += 4; + len -= 4; + if (a == 200 || b == 200) break; /* '=' can't be there */ + *dst++ = a << 2 | b >> 4; + if (c == 200) break; + *dst++ = b << 4 | c >> 2; + if (d == 200) break; + *dst++ = c << 6 | d; + } + *dst = 0; + if (dec_len != NULL) *dec_len = (dst - orig_dst); + return orig_len - len; +} + +#endif /* EXCLUDE_COMMON */ +#ifdef MG_MODULE_LINES +#line 1 "common/cs_dbg.h" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +#ifndef CS_COMMON_CS_DBG_H_ +#define CS_COMMON_CS_DBG_H_ + +/* Amalgamated: #include "common/platform.h" */ + +#if CS_ENABLE_STDIO +#include <stdio.h> +#endif + +#ifndef CS_ENABLE_DEBUG +#define CS_ENABLE_DEBUG 0 +#endif + +#ifndef CS_LOG_ENABLE_TS_DIFF +#define CS_LOG_ENABLE_TS_DIFF 0 +#endif + +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +/* + * Log level; `LL_INFO` is the default. Use `cs_log_set_level()` to change it. + */ +enum cs_log_level { + LL_NONE = -1, + LL_ERROR = 0, + LL_WARN = 1, + LL_INFO = 2, + LL_DEBUG = 3, + LL_VERBOSE_DEBUG = 4, + + _LL_MIN = -2, + _LL_MAX = 5, +}; + +/* + * Set max log level to print; messages with the level above the given one will + * not be printed. + */ +void cs_log_set_level(enum cs_log_level level); + +/* + * Set log filter. NULL (a default) logs everything. + * Otherwise, function name and file name will be tested against the given + * pattern, and only matching messages will be printed. + * + * For the pattern syntax, refer to `mg_match_prefix()` in `str_util.h`. + * + * Example: + * ```c + * void foo(void) { + * LOG(LL_INFO, ("hello from foo")); + * } + * + * void bar(void) { + * LOG(LL_INFO, ("hello from bar")); + * } + * + * void test(void) { + * cs_log_set_filter(NULL); + * foo(); + * bar(); + * + * cs_log_set_filter("f*"); + * foo(); + * bar(); // Will NOT print anything + * + * cs_log_set_filter("bar"); + * foo(); // Will NOT print anything + * bar(); + * } + * ``` + */ +void cs_log_set_filter(const char *pattern); + +/* + * Helper function which prints message prefix with the given `level`, function + * name `func` and `filename`. If message should be printed (accordingly to the + * current log level and filter), prints the prefix and returns 1, otherwise + * returns 0. + * + * Clients should typically just use `LOG()` macro. + */ +int cs_log_print_prefix(enum cs_log_level level, const char *func, + const char *filename); + +extern enum cs_log_level cs_log_threshold; + +#if CS_ENABLE_STDIO + +/* + * Set file to write logs into. If `NULL`, logs go to `stderr`. + */ +void cs_log_set_file(FILE *file); + +/* + * Prints log to the current log file, appends "\n" in the end and flushes the + * stream. + */ +void cs_log_printf(const char *fmt, ...) +#ifdef __GNUC__ + __attribute__((format(printf, 1, 2))) +#endif + ; + +/* + * Format and print message `x` with the given level `l`. Example: + * + * ```c + * LOG(LL_INFO, ("my info message: %d", 123)); + * LOG(LL_DEBUG, ("my debug message: %d", 123)); + * ``` + */ +#define LOG(l, x) \ + do { \ + if (cs_log_print_prefix(l, __func__, __FILE__)) cs_log_printf x; \ + } while (0) + +#ifndef CS_NDEBUG + +/* + * Shortcut for `LOG(LL_VERBOSE_DEBUG, (...))` + */ +#define DBG(x) LOG(LL_VERBOSE_DEBUG, x) + +#else /* NDEBUG */ + +#define DBG(x) + +#endif + +#else /* CS_ENABLE_STDIO */ + +#define LOG(l, x) +#define DBG(x) + +#endif + +#ifdef __cplusplus +} +#endif /* __cplusplus */ + +#endif /* CS_COMMON_CS_DBG_H_ */ +#ifdef MG_MODULE_LINES +#line 1 "common/cs_dbg.c" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +/* Amalgamated: #include "common/cs_dbg.h" */ + +#include <stdarg.h> +#include <stdio.h> +#include <string.h> + +/* Amalgamated: #include "common/cs_time.h" */ +/* Amalgamated: #include "common/str_util.h" */ + +enum cs_log_level cs_log_threshold WEAK = +#if CS_ENABLE_DEBUG + LL_VERBOSE_DEBUG; +#else + LL_ERROR; +#endif + +static char *s_filter_pattern = NULL; +static size_t s_filter_pattern_len; + +void cs_log_set_filter(const char *pattern) WEAK; + +#if CS_ENABLE_STDIO + +FILE *cs_log_file WEAK = NULL; + +#if CS_LOG_ENABLE_TS_DIFF +double cs_log_ts WEAK; +#endif + +enum cs_log_level cs_log_cur_msg_level WEAK = LL_NONE; + +void cs_log_set_filter(const char *pattern) { + free(s_filter_pattern); + if (pattern != NULL) { + s_filter_pattern = strdup(pattern); + s_filter_pattern_len = strlen(pattern); + } else { + s_filter_pattern = NULL; + s_filter_pattern_len = 0; + } +} + +int cs_log_print_prefix(enum cs_log_level, const char *, const char *) WEAK; +int cs_log_print_prefix(enum cs_log_level level, const char *func, + const char *filename) { + char prefix[21]; + + if (level > cs_log_threshold) return 0; + if (s_filter_pattern != NULL && + mg_match_prefix(s_filter_pattern, s_filter_pattern_len, func) < 0 && + mg_match_prefix(s_filter_pattern, s_filter_pattern_len, filename) < 0) { + return 0; + } + + strncpy(prefix, func, 20); + prefix[20] = '\0'; + if (cs_log_file == NULL) cs_log_file = stderr; + cs_log_cur_msg_level = level; + fprintf(cs_log_file, "%-20s ", prefix); +#if CS_LOG_ENABLE_TS_DIFF + { + double now = cs_time(); + fprintf(cs_log_file, "%7u ", (unsigned int) ((now - cs_log_ts) * 1000000)); + cs_log_ts = now; + } +#endif + return 1; +} + +void cs_log_printf(const char *fmt, ...) WEAK; +void cs_log_printf(const char *fmt, ...) { + va_list ap; + va_start(ap, fmt); + vfprintf(cs_log_file, fmt, ap); + va_end(ap); + fputc('\n', cs_log_file); + fflush(cs_log_file); + cs_log_cur_msg_level = LL_NONE; +} + +void cs_log_set_file(FILE *file) WEAK; +void cs_log_set_file(FILE *file) { + cs_log_file = file; +} + +#else + +void cs_log_set_filter(const char *pattern) { + (void) pattern; +} + +#endif /* CS_ENABLE_STDIO */ + +void cs_log_set_level(enum cs_log_level level) WEAK; +void cs_log_set_level(enum cs_log_level level) { + cs_log_threshold = level; +#if CS_LOG_ENABLE_TS_DIFF && CS_ENABLE_STDIO + cs_log_ts = cs_time(); +#endif +} +#ifdef MG_MODULE_LINES +#line 1 "common/cs_dirent.h" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +#ifndef CS_COMMON_CS_DIRENT_H_ +#define CS_COMMON_CS_DIRENT_H_ + +#include <limits.h> + +/* Amalgamated: #include "common/platform.h" */ + +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +#ifdef CS_DEFINE_DIRENT +typedef struct { int dummy; } DIR; + +struct dirent { + int d_ino; +#ifdef _WIN32 + char d_name[MAX_PATH]; +#else + /* TODO(rojer): Use PATH_MAX but make sure it's sane on every platform */ + char d_name[256]; +#endif +}; + +DIR *opendir(const char *dir_name); +int closedir(DIR *dir); +struct dirent *readdir(DIR *dir); +#endif /* CS_DEFINE_DIRENT */ + +#ifdef __cplusplus +} +#endif /* __cplusplus */ + +#endif /* CS_COMMON_CS_DIRENT_H_ */ +#ifdef MG_MODULE_LINES +#line 1 "common/cs_dirent.c" +#endif +/* + * Copyright (c) 2015 Cesanta Software Limited + * All rights reserved + */ + +#ifndef EXCLUDE_COMMON + +/* Amalgamated: #include "common/mg_mem.h" */ +/* Amalgamated: #include "common/cs_dirent.h" */ + +/* + * This file contains POSIX opendir/closedir/readdir API implementation + * for systems which do not natively support it (e.g. Windows). + */ + +#ifdef _WIN32 +struct win32_dir { + DIR d; + HANDLE handle; + WIN32_FIND_DATAW info; + struct dirent result; +}; + +DIR *opendir(const char *name) { + struct win32_dir *dir = NULL; + wchar_t wpath[MAX_PATH]; + DWORD attrs; + + if (name == NULL) { + SetLastError(ERROR_BAD_ARGUMENTS); + } else if ((dir = (struct win32_dir *) MG_MALLOC(sizeof(*dir))) == NULL) { + SetLastError(ERROR_NOT_ENOUGH_MEMORY); + } else { + to_wchar(name, wpath, ARRAY_SIZE(wpath)); + attrs = GetFileAttributesW(wpath); + if (attrs != 0xFFFFFFFF && (attrs & FILE_ATTRIBUTE_DIRECTORY)) { + (void) wcscat(wpath, L"\\*"); + dir->handle = FindFirstFileW(wpath, &dir->info); + dir->result.d_name[0] = '\0'; + } else { + MG_FREE(dir); + dir = NULL; + } + } + + return (DIR *) dir; +} + +int closedir(DIR *d) { + struct win32_dir *dir = (struct win32_dir *) d; + int result = 0; + + if (dir != NULL) { + if (dir->handle != INVALID_HANDLE_VALUE) + result = FindClose(dir->handle) ? 0 : -1; + MG_FREE(dir); + } else { + result = -1; + SetLastError(ERROR_BAD_ARGUMENTS); + } + + return result; +} + +struct dirent *readdir(DIR *d) { + struct win32_dir *dir = (struct win32_dir *) d; + struct dirent *result = NULL; + + if (dir) { + memset(&dir->result, 0, sizeof(dir->result)); + if (dir->handle != INVALID_HANDLE_VALUE) { + result = &dir->result; + (void) WideCharToMultiByte(CP_UTF8, 0, dir->info.cFileName, -1, + result->d_name, sizeof(result->d_name), NULL, + NULL); + + if (!FindNextFileW(dir->handle, &dir->info)) { + (void) FindClose(dir->handle); + dir->handle = INVALID_HANDLE_VALUE; + } + + } else { + SetLastError(ERROR_FILE_NOT_FOUND); + } + } else { + SetLastError(ERROR_BAD_ARGUMENTS); + } + + return result; +} +#endif + +#endif /* EXCLUDE_COMMON */ + +/* ISO C requires a translation unit to contain at least one declaration */ +typedef int cs_dirent_dummy; +#ifdef MG_MODULE_LINES +#line 1 "common/cs_time.c" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +/* Amalgamated: #include "common/cs_time.h" */ + +#ifndef _WIN32 +#include <stddef.h> +/* + * There is no sys/time.h on ARMCC. + */ +#if !(defined(__ARMCC_VERSION) || defined(__ICCARM__)) && \ + !defined(__TI_COMPILER_VERSION__) && \ + (!defined(CS_PLATFORM) || CS_PLATFORM != CS_P_NXP_LPC) +#include <sys/time.h> +#endif +#else +#include <windows.h> +#endif + +double cs_time(void) WEAK; +double cs_time(void) { + double now; +#ifndef _WIN32 + struct timeval tv; + if (gettimeofday(&tv, NULL /* tz */) != 0) return 0; + now = (double) tv.tv_sec + (((double) tv.tv_usec) / 1000000.0); +#else + SYSTEMTIME sysnow; + FILETIME ftime; + GetLocalTime(&sysnow); + SystemTimeToFileTime(&sysnow, &ftime); + /* + * 1. VC 6.0 doesn't support conversion uint64 -> double, so, using int64 + * This should not cause a problems in this (21th) century + * 2. Windows FILETIME is a number of 100-nanosecond intervals since January + * 1, 1601 while time_t is a number of _seconds_ since January 1, 1970 UTC, + * thus, we need to convert to seconds and adjust amount (subtract 11644473600 + * seconds) + */ + now = (double) (((int64_t) ftime.dwLowDateTime + + ((int64_t) ftime.dwHighDateTime << 32)) / + 10000000.0) - + 11644473600; +#endif /* _WIN32 */ + return now; +} + +double cs_timegm(const struct tm *tm) { + /* Month-to-day offset for non-leap-years. */ + static const int month_day[12] = {0, 31, 59, 90, 120, 151, + 181, 212, 243, 273, 304, 334}; + + /* Most of the calculation is easy; leap years are the main difficulty. */ + int month = tm->tm_mon % 12; + int year = tm->tm_year + tm->tm_mon / 12; + int year_for_leap; + int64_t rt; + + if (month < 0) { /* Negative values % 12 are still negative. */ + month += 12; + --year; + } + + /* This is the number of Februaries since 1900. */ + year_for_leap = (month > 1) ? year + 1 : year; + + rt = + tm->tm_sec /* Seconds */ + + + 60 * + (tm->tm_min /* Minute = 60 seconds */ + + + 60 * (tm->tm_hour /* Hour = 60 minutes */ + + + 24 * (month_day[month] + tm->tm_mday - 1 /* Day = 24 hours */ + + 365 * (year - 70) /* Year = 365 days */ + + (year_for_leap - 69) / 4 /* Every 4 years is leap... */ + - (year_for_leap - 1) / 100 /* Except centuries... */ + + (year_for_leap + 299) / 400))); /* Except 400s. */ + return rt < 0 ? -1 : (double) rt; +} +#ifdef MG_MODULE_LINES +#line 1 "common/cs_endian.h" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +#ifndef CS_COMMON_CS_ENDIAN_H_ +#define CS_COMMON_CS_ENDIAN_H_ + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * clang with std=-c99 uses __LITTLE_ENDIAN, by default + * while for ex, RTOS gcc - LITTLE_ENDIAN, by default + * it depends on __USE_BSD, but let's have everything + */ +#if !defined(BYTE_ORDER) && defined(__BYTE_ORDER) +#define BYTE_ORDER __BYTE_ORDER +#ifndef LITTLE_ENDIAN +#define LITTLE_ENDIAN __LITTLE_ENDIAN +#endif /* LITTLE_ENDIAN */ +#ifndef BIG_ENDIAN +#define BIG_ENDIAN __LITTLE_ENDIAN +#endif /* BIG_ENDIAN */ +#endif /* BYTE_ORDER */ + +#ifdef __cplusplus +} +#endif + +#endif /* CS_COMMON_CS_ENDIAN_H_ */ +#ifdef MG_MODULE_LINES +#line 1 "common/cs_md5.c" +#endif +/* + * This code implements the MD5 message-digest algorithm. + * The algorithm is due to Ron Rivest. This code was + * written by Colin Plumb in 1993, no copyright is claimed. + * This code is in the public domain; do with it what you wish. + * + * Equivalent code is available from RSA Data Security, Inc. + * This code has been tested against that, and is equivalent, + * except that you don't need to include two pages of legalese + * with every copy. + * + * To compute the message digest of a chunk of bytes, declare an + * MD5Context structure, pass it to MD5Init, call MD5Update as + * needed on buffers full of bytes, and then call MD5Final, which + * will fill a supplied 16-byte array with the digest. + */ + +/* Amalgamated: #include "common/cs_md5.h" */ +/* Amalgamated: #include "common/str_util.h" */ + +#if !defined(EXCLUDE_COMMON) +#if !CS_DISABLE_MD5 + +/* Amalgamated: #include "common/cs_endian.h" */ + +static void byteReverse(unsigned char *buf, unsigned longs) { +/* Forrest: MD5 expect LITTLE_ENDIAN, swap if BIG_ENDIAN */ +#if BYTE_ORDER == BIG_ENDIAN + do { + uint32_t t = (uint32_t)((unsigned) buf[3] << 8 | buf[2]) << 16 | + ((unsigned) buf[1] << 8 | buf[0]); + *(uint32_t *) buf = t; + buf += 4; + } while (--longs); +#else + (void) buf; + (void) longs; +#endif +} + +#define F1(x, y, z) (z ^ (x & (y ^ z))) +#define F2(x, y, z) F1(z, x, y) +#define F3(x, y, z) (x ^ y ^ z) +#define F4(x, y, z) (y ^ (x | ~z)) + +#define MD5STEP(f, w, x, y, z, data, s) \ + (w += f(x, y, z) + data, w = w << s | w >> (32 - s), w += x) + +/* + * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious + * initialization constants. + */ +void cs_md5_init(cs_md5_ctx *ctx) { + ctx->buf[0] = 0x67452301; + ctx->buf[1] = 0xefcdab89; + ctx->buf[2] = 0x98badcfe; + ctx->buf[3] = 0x10325476; + + ctx->bits[0] = 0; + ctx->bits[1] = 0; +} + +static void cs_md5_transform(uint32_t buf[4], uint32_t const in[16]) { + register uint32_t a, b, c, d; + + a = buf[0]; + b = buf[1]; + c = buf[2]; + d = buf[3]; + + MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7); + MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12); + MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17); + MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22); + MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7); + MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12); + MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17); + MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22); + MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7); + MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12); + MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); + MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); + MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); + MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); + MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); + MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); + + MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5); + MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9); + MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); + MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20); + MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5); + MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); + MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); + MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20); + MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5); + MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); + MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14); + MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20); + MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); + MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9); + MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14); + MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); + + MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4); + MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11); + MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); + MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); + MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4); + MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11); + MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16); + MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); + MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); + MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11); + MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16); + MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23); + MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4); + MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); + MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); + MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23); + + MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6); + MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10); + MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); + MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21); + MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); + MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10); + MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); + MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21); + MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6); + MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); + MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15); + MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); + MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6); + MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); + MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15); + MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21); + + buf[0] += a; + buf[1] += b; + buf[2] += c; + buf[3] += d; +} + +void cs_md5_update(cs_md5_ctx *ctx, const unsigned char *buf, size_t len) { + uint32_t t; + + t = ctx->bits[0]; + if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t) ctx->bits[1]++; + ctx->bits[1] += (uint32_t) len >> 29; + + t = (t >> 3) & 0x3f; + + if (t) { + unsigned char *p = (unsigned char *) ctx->in + t; + + t = 64 - t; + if (len < t) { + memcpy(p, buf, len); + return; + } + memcpy(p, buf, t); + byteReverse(ctx->in, 16); + cs_md5_transform(ctx->buf, (uint32_t *) ctx->in); + buf += t; + len -= t; + } + + while (len >= 64) { + memcpy(ctx->in, buf, 64); + byteReverse(ctx->in, 16); + cs_md5_transform(ctx->buf, (uint32_t *) ctx->in); + buf += 64; + len -= 64; + } + + memcpy(ctx->in, buf, len); +} + +void cs_md5_final(unsigned char digest[16], cs_md5_ctx *ctx) { + unsigned count; + unsigned char *p; + uint32_t *a; + + count = (ctx->bits[0] >> 3) & 0x3F; + + p = ctx->in + count; + *p++ = 0x80; + count = 64 - 1 - count; + if (count < 8) { + memset(p, 0, count); + byteReverse(ctx->in, 16); + cs_md5_transform(ctx->buf, (uint32_t *) ctx->in); + memset(ctx->in, 0, 56); + } else { + memset(p, 0, count - 8); + } + byteReverse(ctx->in, 14); + + a = (uint32_t *) ctx->in; + a[14] = ctx->bits[0]; + a[15] = ctx->bits[1]; + + cs_md5_transform(ctx->buf, (uint32_t *) ctx->in); + byteReverse((unsigned char *) ctx->buf, 4); + memcpy(digest, ctx->buf, 16); + memset((char *) ctx, 0, sizeof(*ctx)); +} + +#endif /* CS_DISABLE_MD5 */ +#endif /* EXCLUDE_COMMON */ +#ifdef MG_MODULE_LINES +#line 1 "common/cs_sha1.c" +#endif +/* Copyright(c) By Steve Reid <[email protected]> */ +/* 100% Public Domain */ + +/* Amalgamated: #include "common/cs_sha1.h" */ + +#if !CS_DISABLE_SHA1 && !defined(EXCLUDE_COMMON) + +/* Amalgamated: #include "common/cs_endian.h" */ + +#define SHA1HANDSOFF +#if defined(__sun) +/* Amalgamated: #include "common/solarisfixes.h" */ +#endif + +union char64long16 { + unsigned char c[64]; + uint32_t l[16]; +}; + +#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits)))) + +static uint32_t blk0(union char64long16 *block, int i) { +/* Forrest: SHA expect BIG_ENDIAN, swap if LITTLE_ENDIAN */ +#if BYTE_ORDER == LITTLE_ENDIAN + block->l[i] = + (rol(block->l[i], 24) & 0xFF00FF00) | (rol(block->l[i], 8) & 0x00FF00FF); +#endif + return block->l[i]; +} + +/* Avoid redefine warning (ARM /usr/include/sys/ucontext.h define R0~R4) */ +#undef blk +#undef R0 +#undef R1 +#undef R2 +#undef R3 +#undef R4 + +#define blk(i) \ + (block->l[i & 15] = rol(block->l[(i + 13) & 15] ^ block->l[(i + 8) & 15] ^ \ + block->l[(i + 2) & 15] ^ block->l[i & 15], \ + 1)) +#define R0(v, w, x, y, z, i) \ + z += ((w & (x ^ y)) ^ y) + blk0(block, i) + 0x5A827999 + rol(v, 5); \ + w = rol(w, 30); +#define R1(v, w, x, y, z, i) \ + z += ((w & (x ^ y)) ^ y) + blk(i) + 0x5A827999 + rol(v, 5); \ + w = rol(w, 30); +#define R2(v, w, x, y, z, i) \ + z += (w ^ x ^ y) + blk(i) + 0x6ED9EBA1 + rol(v, 5); \ + w = rol(w, 30); +#define R3(v, w, x, y, z, i) \ + z += (((w | x) & y) | (w & x)) + blk(i) + 0x8F1BBCDC + rol(v, 5); \ + w = rol(w, 30); +#define R4(v, w, x, y, z, i) \ + z += (w ^ x ^ y) + blk(i) + 0xCA62C1D6 + rol(v, 5); \ + w = rol(w, 30); + +void cs_sha1_transform(uint32_t state[5], const unsigned char buffer[64]) { + uint32_t a, b, c, d, e; + union char64long16 block[1]; + + memcpy(block, buffer, 64); + a = state[0]; + b = state[1]; + c = state[2]; + d = state[3]; + e = state[4]; + R0(a, b, c, d, e, 0); + R0(e, a, b, c, d, 1); + R0(d, e, a, b, c, 2); + R0(c, d, e, a, b, 3); + R0(b, c, d, e, a, 4); + R0(a, b, c, d, e, 5); + R0(e, a, b, c, d, 6); + R0(d, e, a, b, c, 7); + R0(c, d, e, a, b, 8); + R0(b, c, d, e, a, 9); + R0(a, b, c, d, e, 10); + R0(e, a, b, c, d, 11); + R0(d, e, a, b, c, 12); + R0(c, d, e, a, b, 13); + R0(b, c, d, e, a, 14); + R0(a, b, c, d, e, 15); + R1(e, a, b, c, d, 16); + R1(d, e, a, b, c, 17); + R1(c, d, e, a, b, 18); + R1(b, c, d, e, a, 19); + R2(a, b, c, d, e, 20); + R2(e, a, b, c, d, 21); + R2(d, e, a, b, c, 22); + R2(c, d, e, a, b, 23); + R2(b, c, d, e, a, 24); + R2(a, b, c, d, e, 25); + R2(e, a, b, c, d, 26); + R2(d, e, a, b, c, 27); + R2(c, d, e, a, b, 28); + R2(b, c, d, e, a, 29); + R2(a, b, c, d, e, 30); + R2(e, a, b, c, d, 31); + R2(d, e, a, b, c, 32); + R2(c, d, e, a, b, 33); + R2(b, c, d, e, a, 34); + R2(a, b, c, d, e, 35); + R2(e, a, b, c, d, 36); + R2(d, e, a, b, c, 37); + R2(c, d, e, a, b, 38); + R2(b, c, d, e, a, 39); + R3(a, b, c, d, e, 40); + R3(e, a, b, c, d, 41); + R3(d, e, a, b, c, 42); + R3(c, d, e, a, b, 43); + R3(b, c, d, e, a, 44); + R3(a, b, c, d, e, 45); + R3(e, a, b, c, d, 46); + R3(d, e, a, b, c, 47); + R3(c, d, e, a, b, 48); + R3(b, c, d, e, a, 49); + R3(a, b, c, d, e, 50); + R3(e, a, b, c, d, 51); + R3(d, e, a, b, c, 52); + R3(c, d, e, a, b, 53); + R3(b, c, d, e, a, 54); + R3(a, b, c, d, e, 55); + R3(e, a, b, c, d, 56); + R3(d, e, a, b, c, 57); + R3(c, d, e, a, b, 58); + R3(b, c, d, e, a, 59); + R4(a, b, c, d, e, 60); + R4(e, a, b, c, d, 61); + R4(d, e, a, b, c, 62); + R4(c, d, e, a, b, 63); + R4(b, c, d, e, a, 64); + R4(a, b, c, d, e, 65); + R4(e, a, b, c, d, 66); + R4(d, e, a, b, c, 67); + R4(c, d, e, a, b, 68); + R4(b, c, d, e, a, 69); + R4(a, b, c, d, e, 70); + R4(e, a, b, c, d, 71); + R4(d, e, a, b, c, 72); + R4(c, d, e, a, b, 73); + R4(b, c, d, e, a, 74); + R4(a, b, c, d, e, 75); + R4(e, a, b, c, d, 76); + R4(d, e, a, b, c, 77); + R4(c, d, e, a, b, 78); + R4(b, c, d, e, a, 79); + state[0] += a; + state[1] += b; + state[2] += c; + state[3] += d; + state[4] += e; + /* Erase working structures. The order of operations is important, + * used to ensure that compiler doesn't optimize those out. */ + memset(block, 0, sizeof(block)); + a = b = c = d = e = 0; + (void) a; + (void) b; + (void) c; + (void) d; + (void) e; +} + +void cs_sha1_init(cs_sha1_ctx *context) { + context->state[0] = 0x67452301; + context->state[1] = 0xEFCDAB89; + context->state[2] = 0x98BADCFE; + context->state[3] = 0x10325476; + context->state[4] = 0xC3D2E1F0; + context->count[0] = context->count[1] = 0; +} + +void cs_sha1_update(cs_sha1_ctx *context, const unsigned char *data, + uint32_t len) { + uint32_t i, j; + + j = context->count[0]; + if ((context->count[0] += len << 3) < j) context->count[1]++; + context->count[1] += (len >> 29); + j = (j >> 3) & 63; + if ((j + len) > 63) { + memcpy(&context->buffer[j], data, (i = 64 - j)); + cs_sha1_transform(context->state, context->buffer); + for (; i + 63 < len; i += 64) { + cs_sha1_transform(context->state, &data[i]); + } + j = 0; + } else + i = 0; + memcpy(&context->buffer[j], &data[i], len - i); +} + +void cs_sha1_final(unsigned char digest[20], cs_sha1_ctx *context) { + unsigned i; + unsigned char finalcount[8], c; + + for (i = 0; i < 8; i++) { + finalcount[i] = (unsigned char) ((context->count[(i >= 4 ? 0 : 1)] >> + ((3 - (i & 3)) * 8)) & + 255); + } + c = 0200; + cs_sha1_update(context, &c, 1); + while ((context->count[0] & 504) != 448) { + c = 0000; + cs_sha1_update(context, &c, 1); + } + cs_sha1_update(context, finalcount, 8); + for (i = 0; i < 20; i++) { + digest[i] = + (unsigned char) ((context->state[i >> 2] >> ((3 - (i & 3)) * 8)) & 255); + } + memset(context, '\0', sizeof(*context)); + memset(&finalcount, '\0', sizeof(finalcount)); +} + +void cs_hmac_sha1(const unsigned char *key, size_t keylen, + const unsigned char *data, size_t datalen, + unsigned char out[20]) { + cs_sha1_ctx ctx; + unsigned char buf1[64], buf2[64], tmp_key[20], i; + + if (keylen > sizeof(buf1)) { + cs_sha1_init(&ctx); + cs_sha1_update(&ctx, key, keylen); + cs_sha1_final(tmp_key, &ctx); + key = tmp_key; + keylen = sizeof(tmp_key); + } + + memset(buf1, 0, sizeof(buf1)); + memset(buf2, 0, sizeof(buf2)); + memcpy(buf1, key, keylen); + memcpy(buf2, key, keylen); + + for (i = 0; i < sizeof(buf1); i++) { + buf1[i] ^= 0x36; + buf2[i] ^= 0x5c; + } + + cs_sha1_init(&ctx); + cs_sha1_update(&ctx, buf1, sizeof(buf1)); + cs_sha1_update(&ctx, data, datalen); + cs_sha1_final(out, &ctx); + + cs_sha1_init(&ctx); + cs_sha1_update(&ctx, buf2, sizeof(buf2)); + cs_sha1_update(&ctx, out, 20); + cs_sha1_final(out, &ctx); +} + +#endif /* EXCLUDE_COMMON */ +#ifdef MG_MODULE_LINES +#line 1 "common/mbuf.c" +#endif +/* + * Copyright (c) 2014 Cesanta Software Limited + * All rights reserved + */ + +#ifndef EXCLUDE_COMMON + +#include <assert.h> +#include <string.h> +/* Amalgamated: #include "common/mbuf.h" */ + +#ifndef MBUF_REALLOC +#define MBUF_REALLOC realloc +#endif + +#ifndef MBUF_FREE +#define MBUF_FREE free +#endif + +void mbuf_init(struct mbuf *mbuf, size_t initial_size) WEAK; +void mbuf_init(struct mbuf *mbuf, size_t initial_size) { + mbuf->len = mbuf->size = 0; + mbuf->buf = NULL; + mbuf_resize(mbuf, initial_size); +} + +void mbuf_free(struct mbuf *mbuf) WEAK; +void mbuf_free(struct mbuf *mbuf) { + if (mbuf->buf != NULL) { + MBUF_FREE(mbuf->buf); + mbuf_init(mbuf, 0); + } +} + +void mbuf_resize(struct mbuf *a, size_t new_size) WEAK; +void mbuf_resize(struct mbuf *a, size_t new_size) { + if (new_size > a->size || (new_size < a->size && new_size >= a->len)) { + char *buf = (char *) MBUF_REALLOC(a->buf, new_size); + /* + * In case realloc fails, there's not much we can do, except keep things as + * they are. Note that NULL is a valid return value from realloc when + * size == 0, but that is covered too. + */ + if (buf == NULL && new_size != 0) return; + a->buf = buf; + a->size = new_size; + } +} + +void mbuf_trim(struct mbuf *mbuf) WEAK; +void mbuf_trim(struct mbuf *mbuf) { + mbuf_resize(mbuf, mbuf->len); +} + +size_t mbuf_insert(struct mbuf *a, size_t off, const void *buf, size_t) WEAK; +size_t mbuf_insert(struct mbuf *a, size_t off, const void *buf, size_t len) { + char *p = NULL; + + assert(a != NULL); + assert(a->len <= a->size); + assert(off <= a->len); + + /* check overflow */ + if (~(size_t) 0 - (size_t) a->buf < len) return 0; + + if (a->len + len <= a->size) { + memmove(a->buf + off + len, a->buf + off, a->len - off); + if (buf != NULL) { + memcpy(a->buf + off, buf, len); + } + a->len += len; + } else { + size_t new_size = (size_t)((a->len + len) * MBUF_SIZE_MULTIPLIER); + if ((p = (char *) MBUF_REALLOC(a->buf, new_size)) != NULL) { + a->buf = p; + memmove(a->buf + off + len, a->buf + off, a->len - off); + if (buf != NULL) memcpy(a->buf + off, buf, len); + a->len += len; + a->size = new_size; + } else { + len = 0; + } + } + + return len; +} + +size_t mbuf_append(struct mbuf *a, const void *buf, size_t len) WEAK; +size_t mbuf_append(struct mbuf *a, const void *buf, size_t len) { + return mbuf_insert(a, a->len, buf, len); +} + +void mbuf_remove(struct mbuf *mb, size_t n) WEAK; +void mbuf_remove(struct mbuf *mb, size_t n) { + if (n > 0 && n <= mb->len) { + memmove(mb->buf, mb->buf + n, mb->len - n); + mb->len -= n; + } +} + +#endif /* EXCLUDE_COMMON */ +#ifdef MG_MODULE_LINES +#line 1 "common/mg_str.c" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +/* Amalgamated: #include "common/mg_mem.h" */ +/* Amalgamated: #include "common/mg_str.h" */ + +#include <stdlib.h> +#include <string.h> + +int mg_ncasecmp(const char *s1, const char *s2, size_t len) WEAK; + +struct mg_str mg_mk_str(const char *s) WEAK; +struct mg_str mg_mk_str(const char *s) { + struct mg_str ret = {s, 0}; + if (s != NULL) ret.len = strlen(s); + return ret; +} + +struct mg_str mg_mk_str_n(const char *s, size_t len) WEAK; +struct mg_str mg_mk_str_n(const char *s, size_t len) { + struct mg_str ret = {s, len}; + return ret; +} + +int mg_vcmp(const struct mg_str *str1, const char *str2) WEAK; +int mg_vcmp(const struct mg_str *str1, const char *str2) { + size_t n2 = strlen(str2), n1 = str1->len; + int r = strncmp(str1->p, str2, (n1 < n2) ? n1 : n2); + if (r == 0) { + return n1 - n2; + } + return r; +} + +int mg_vcasecmp(const struct mg_str *str1, const char *str2) WEAK; +int mg_vcasecmp(const struct mg_str *str1, const char *str2) { + size_t n2 = strlen(str2), n1 = str1->len; + int r = mg_ncasecmp(str1->p, str2, (n1 < n2) ? n1 : n2); + if (r == 0) { + return n1 - n2; + } + return r; +} + +static struct mg_str mg_strdup_common(const struct mg_str s, + int nul_terminate) { + struct mg_str r = {NULL, 0}; + if (s.len > 0 && s.p != NULL) { + char *sc = (char *) MG_MALLOC(s.len + (nul_terminate ? 1 : 0)); + if (sc != NULL) { + memcpy(sc, s.p, s.len); + if (nul_terminate) sc[s.len] = '\0'; + r.p = sc; + r.len = s.len; + } + } + return r; +} + +struct mg_str mg_strdup(const struct mg_str s) WEAK; +struct mg_str mg_strdup(const struct mg_str s) { + return mg_strdup_common(s, 0 /* NUL-terminate */); +} + +struct mg_str mg_strdup_nul(const struct mg_str s) WEAK; +struct mg_str mg_strdup_nul(const struct mg_str s) { + return mg_strdup_common(s, 1 /* NUL-terminate */); +} + +const char *mg_strchr(const struct mg_str s, int c) WEAK; +const char *mg_strchr(const struct mg_str s, int c) { + size_t i; + for (i = 0; i < s.len; i++) { + if (s.p[i] == c) return &s.p[i]; + } + return NULL; +} + +int mg_strcmp(const struct mg_str str1, const struct mg_str str2) WEAK; +int mg_strcmp(const struct mg_str str1, const struct mg_str str2) { + size_t i = 0; + while (i < str1.len && i < str2.len) { + if (str1.p[i] < str2.p[i]) return -1; + if (str1.p[i] > str2.p[i]) return 1; + i++; + } + if (i < str1.len) return 1; + if (i < str2.len) return -1; + return 0; +} + +int mg_strncmp(const struct mg_str, const struct mg_str, size_t n) WEAK; +int mg_strncmp(const struct mg_str str1, const struct mg_str str2, size_t n) { + struct mg_str s1 = str1; + struct mg_str s2 = str2; + + if (s1.len > n) { + s1.len = n; + } + if (s2.len > n) { + s2.len = n; + } + return mg_strcmp(s1, s2); +} + +const char *mg_strstr(const struct mg_str haystack, + const struct mg_str needle) WEAK; +const char *mg_strstr(const struct mg_str haystack, + const struct mg_str needle) { + size_t i; + if (needle.len > haystack.len) return NULL; + for (i = 0; i <= haystack.len - needle.len; i++) { + if (memcmp(haystack.p + i, needle.p, needle.len) == 0) { + return haystack.p + i; + } + } + return NULL; +} +#ifdef MG_MODULE_LINES +#line 1 "common/str_util.c" +#endif +/* + * Copyright (c) 2015 Cesanta Software Limited + * All rights reserved + */ + +#ifndef EXCLUDE_COMMON + +/* Amalgamated: #include "common/mg_mem.h" */ +/* Amalgamated: #include "common/platform.h" */ +/* Amalgamated: #include "common/str_util.h" */ + +#ifndef C_DISABLE_BUILTIN_SNPRINTF +#define C_DISABLE_BUILTIN_SNPRINTF 0 +#endif + +/* Amalgamated: #include "common/mg_mem.h" */ + +size_t c_strnlen(const char *s, size_t maxlen) WEAK; +size_t c_strnlen(const char *s, size_t maxlen) { + size_t l = 0; + for (; l < maxlen && s[l] != '\0'; l++) { + } + return l; +} + +#define C_SNPRINTF_APPEND_CHAR(ch) \ + do { \ + if (i < (int) buf_size) buf[i] = ch; \ + i++; \ + } while (0) + +#define C_SNPRINTF_FLAG_ZERO 1 + +#if C_DISABLE_BUILTIN_SNPRINTF +int c_vsnprintf(char *buf, size_t buf_size, const char *fmt, va_list ap) WEAK; +int c_vsnprintf(char *buf, size_t buf_size, const char *fmt, va_list ap) { + return vsnprintf(buf, buf_size, fmt, ap); +} +#else +static int c_itoa(char *buf, size_t buf_size, int64_t num, int base, int flags, + int field_width) { + char tmp[40]; + int i = 0, k = 0, neg = 0; + + if (num < 0) { + neg++; + num = -num; + } + + /* Print into temporary buffer - in reverse order */ + do { + int rem = num % base; + if (rem < 10) { + tmp[k++] = '0' + rem; + } else { + tmp[k++] = 'a' + (rem - 10); + } + num /= base; + } while (num > 0); + + /* Zero padding */ + if (flags && C_SNPRINTF_FLAG_ZERO) { + while (k < field_width && k < (int) sizeof(tmp) - 1) { + tmp[k++] = '0'; + } + } + + /* And sign */ + if (neg) { + tmp[k++] = '-'; + } + + /* Now output */ + while (--k >= 0) { + C_SNPRINTF_APPEND_CHAR(tmp[k]); + } + + return i; +} + +int c_vsnprintf(char *buf, size_t buf_size, const char *fmt, va_list ap) WEAK; +int c_vsnprintf(char *buf, size_t buf_size, const char *fmt, va_list ap) { + int ch, i = 0, len_mod, flags, precision, field_width; + + while ((ch = *fmt++) != '\0') { + if (ch != '%') { + C_SNPRINTF_APPEND_CHAR(ch); + } else { + /* + * Conversion specification: + * zero or more flags (one of: # 0 - <space> + ') + * an optional minimum field width (digits) + * an optional precision (. followed by digits, or *) + * an optional length modifier (one of: hh h l ll L q j z t) + * conversion specifier (one of: d i o u x X e E f F g G a A c s p n) + */ + flags = field_width = precision = len_mod = 0; + + /* Flags. only zero-pad flag is supported. */ + if (*fmt == '0') { + flags |= C_SNPRINTF_FLAG_ZERO; + } + + /* Field width */ + while (*fmt >= '0' && *fmt <= '9') { + field_width *= 10; + field_width += *fmt++ - '0'; + } + /* Dynamic field width */ + if (*fmt == '*') { + field_width = va_arg(ap, int); + fmt++; + } + + /* Precision */ + if (*fmt == '.') { + fmt++; + if (*fmt == '*') { + precision = va_arg(ap, int); + fmt++; + } else { + while (*fmt >= '0' && *fmt <= '9') { + precision *= 10; + precision += *fmt++ - '0'; + } + } + } + + /* Length modifier */ + switch (*fmt) { + case 'h': + case 'l': + case 'L': + case 'I': + case 'q': + case 'j': + case 'z': + case 't': + len_mod = *fmt++; + if (*fmt == 'h') { + len_mod = 'H'; + fmt++; + } + if (*fmt == 'l') { + len_mod = 'q'; + fmt++; + } + break; + } + + ch = *fmt++; + if (ch == 's') { + const char *s = va_arg(ap, const char *); /* Always fetch parameter */ + int j; + int pad = field_width - (precision >= 0 ? c_strnlen(s, precision) : 0); + for (j = 0; j < pad; j++) { + C_SNPRINTF_APPEND_CHAR(' '); + } + + /* `s` may be NULL in case of %.*s */ + if (s != NULL) { + /* Ignore negative and 0 precisions */ + for (j = 0; (precision <= 0 || j < precision) && s[j] != '\0'; j++) { + C_SNPRINTF_APPEND_CHAR(s[j]); + } + } + } else if (ch == 'c') { + ch = va_arg(ap, int); /* Always fetch parameter */ + C_SNPRINTF_APPEND_CHAR(ch); + } else if (ch == 'd' && len_mod == 0) { + i += c_itoa(buf + i, buf_size - i, va_arg(ap, int), 10, flags, + field_width); + } else if (ch == 'd' && len_mod == 'l') { + i += c_itoa(buf + i, buf_size - i, va_arg(ap, long), 10, flags, + field_width); +#ifdef SSIZE_MAX + } else if (ch == 'd' && len_mod == 'z') { + i += c_itoa(buf + i, buf_size - i, va_arg(ap, ssize_t), 10, flags, + field_width); +#endif + } else if (ch == 'd' && len_mod == 'q') { + i += c_itoa(buf + i, buf_size - i, va_arg(ap, int64_t), 10, flags, + field_width); + } else if ((ch == 'x' || ch == 'u') && len_mod == 0) { + i += c_itoa(buf + i, buf_size - i, va_arg(ap, unsigned), + ch == 'x' ? 16 : 10, flags, field_width); + } else if ((ch == 'x' || ch == 'u') && len_mod == 'l') { + i += c_itoa(buf + i, buf_size - i, va_arg(ap, unsigned long), + ch == 'x' ? 16 : 10, flags, field_width); + } else if ((ch == 'x' || ch == 'u') && len_mod == 'z') { + i += c_itoa(buf + i, buf_size - i, va_arg(ap, size_t), + ch == 'x' ? 16 : 10, flags, field_width); + } else if (ch == 'p') { + unsigned long num = (unsigned long) (uintptr_t) va_arg(ap, void *); + C_SNPRINTF_APPEND_CHAR('0'); + C_SNPRINTF_APPEND_CHAR('x'); + i += c_itoa(buf + i, buf_size - i, num, 16, flags, 0); + } else { +#ifndef NO_LIBC + /* + * TODO(lsm): abort is not nice in a library, remove it + * Also, ESP8266 SDK doesn't have it + */ + abort(); +#endif + } + } + } + + /* Zero-terminate the result */ + if (buf_size > 0) { + buf[i < (int) buf_size ? i : (int) buf_size - 1] = '\0'; + } + + return i; +} +#endif + +int c_snprintf(char *buf, size_t buf_size, const char *fmt, ...) WEAK; +int c_snprintf(char *buf, size_t buf_size, const char *fmt, ...) { + int result; + va_list ap; + va_start(ap, fmt); + result = c_vsnprintf(buf, buf_size, fmt, ap); + va_end(ap); + return result; +} + +#ifdef _WIN32 +int to_wchar(const char *path, wchar_t *wbuf, size_t wbuf_len) { + int ret; + char buf[MAX_PATH * 2], buf2[MAX_PATH * 2], *p; + + strncpy(buf, path, sizeof(buf)); + buf[sizeof(buf) - 1] = '\0'; + + /* Trim trailing slashes. Leave backslash for paths like "X:\" */ + p = buf + strlen(buf) - 1; + while (p > buf && p[-1] != ':' && (p[0] == '\\' || p[0] == '/')) *p-- = '\0'; + + memset(wbuf, 0, wbuf_len * sizeof(wchar_t)); + ret = MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int) wbuf_len); + + /* + * Convert back to Unicode. If doubly-converted string does not match the + * original, something is fishy, reject. + */ + WideCharToMultiByte(CP_UTF8, 0, wbuf, (int) wbuf_len, buf2, sizeof(buf2), + NULL, NULL); + if (strcmp(buf, buf2) != 0) { + wbuf[0] = L'\0'; + ret = 0; + } + + return ret; +} +#endif /* _WIN32 */ + +/* The simplest O(mn) algorithm. Better implementation are GPLed */ +const char *c_strnstr(const char *s, const char *find, size_t slen) WEAK; +const char *c_strnstr(const char *s, const char *find, size_t slen) { + size_t find_length = strlen(find); + size_t i; + + for (i = 0; i < slen; i++) { + if (i + find_length > slen) { + return NULL; + } + + if (strncmp(&s[i], find, find_length) == 0) { + return &s[i]; + } + } + + return NULL; +} + +#if CS_ENABLE_STRDUP +char *strdup(const char *src) WEAK; +char *strdup(const char *src) { + size_t len = strlen(src) + 1; + char *ret = MG_MALLOC(len); + if (ret != NULL) { + strcpy(ret, src); + } + return ret; +} +#endif + +void cs_to_hex(char *to, const unsigned char *p, size_t len) WEAK; +void cs_to_hex(char *to, const unsigned char *p, size_t len) { + static const char *hex = "0123456789abcdef"; + + for (; len--; p++) { + *to++ = hex[p[0] >> 4]; + *to++ = hex[p[0] & 0x0f]; + } + *to = '\0'; +} + +static int fourbit(int ch) { + if (ch >= '0' && ch <= '9') { + return ch - '0'; + } else if (ch >= 'a' && ch <= 'f') { + return ch - 'a' + 10; + } else if (ch >= 'A' && ch <= 'F') { + return ch - 'A' + 10; + } + return 0; +} + +void cs_from_hex(char *to, const char *p, size_t len) WEAK; +void cs_from_hex(char *to, const char *p, size_t len) { + size_t i; + + for (i = 0; i < len; i += 2) { + *to++ = (fourbit(p[i]) << 4) + fourbit(p[i + 1]); + } + *to = '\0'; +} + +#if CS_ENABLE_TO64 +int64_t cs_to64(const char *s) WEAK; +int64_t cs_to64(const char *s) { + int64_t result = 0; + int64_t neg = 1; + while (*s && isspace((unsigned char) *s)) s++; + if (*s == '-') { + neg = -1; + s++; + } + while (isdigit((unsigned char) *s)) { + result *= 10; + result += (*s - '0'); + s++; + } + return result * neg; +} +#endif + +static int str_util_lowercase(const char *s) { + return tolower(*(const unsigned char *) s); +} + +int mg_ncasecmp(const char *s1, const char *s2, size_t len) WEAK; +int mg_ncasecmp(const char *s1, const char *s2, size_t len) { + int diff = 0; + + if (len > 0) do { + diff = str_util_lowercase(s1++) - str_util_lowercase(s2++); + } while (diff == 0 && s1[-1] != '\0' && --len > 0); + + return diff; +} + +int mg_casecmp(const char *s1, const char *s2) WEAK; +int mg_casecmp(const char *s1, const char *s2) { + return mg_ncasecmp(s1, s2, (size_t) ~0); +} + +int mg_asprintf(char **buf, size_t size, const char *fmt, ...) WEAK; +int mg_asprintf(char **buf, size_t size, const char *fmt, ...) { + int ret; + va_list ap; + va_start(ap, fmt); + ret = mg_avprintf(buf, size, fmt, ap); + va_end(ap); + return ret; +} + +int mg_avprintf(char **buf, size_t size, const char *fmt, va_list ap) WEAK; +int mg_avprintf(char **buf, size_t size, const char *fmt, va_list ap) { + va_list ap_copy; + int len; + + va_copy(ap_copy, ap); + len = vsnprintf(*buf, size, fmt, ap_copy); + va_end(ap_copy); + + if (len < 0) { + /* eCos and Windows are not standard-compliant and return -1 when + * the buffer is too small. Keep allocating larger buffers until we + * succeed or out of memory. */ + *buf = NULL; /* LCOV_EXCL_START */ + while (len < 0) { + MG_FREE(*buf); + if (size == 0) { + size = 5; + } + size *= 2; + if ((*buf = (char *) MG_MALLOC(size)) == NULL) { + len = -1; + break; + } + va_copy(ap_copy, ap); + len = vsnprintf(*buf, size - 1, fmt, ap_copy); + va_end(ap_copy); + } + + /* + * Microsoft version of vsnprintf() is not always null-terminated, so put + * the terminator manually + */ + (*buf)[len] = 0; + /* LCOV_EXCL_STOP */ + } else if (len >= (int) size) { + /* Standard-compliant code path. Allocate a buffer that is large enough. */ + if ((*buf = (char *) MG_MALLOC(len + 1)) == NULL) { + len = -1; /* LCOV_EXCL_LINE */ + } else { /* LCOV_EXCL_LINE */ + va_copy(ap_copy, ap); + len = vsnprintf(*buf, len + 1, fmt, ap_copy); + va_end(ap_copy); + } + } + + return len; +} + +const char *mg_next_comma_list_entry(const char *, struct mg_str *, + struct mg_str *) WEAK; +const char *mg_next_comma_list_entry(const char *list, struct mg_str *val, + struct mg_str *eq_val) { + struct mg_str ret = mg_next_comma_list_entry_n(mg_mk_str(list), val, eq_val); + return ret.p; +} + +struct mg_str mg_next_comma_list_entry_n(struct mg_str list, struct mg_str *val, + struct mg_str *eq_val) WEAK; +struct mg_str mg_next_comma_list_entry_n(struct mg_str list, struct mg_str *val, + struct mg_str *eq_val) { + if (list.len == 0) { + /* End of the list */ + list = mg_mk_str(NULL); + } else { + const char *chr = NULL; + *val = list; + + if ((chr = mg_strchr(*val, ',')) != NULL) { + /* Comma found. Store length and shift the list ptr */ + val->len = chr - val->p; + chr++; + list.len -= (chr - list.p); + list.p = chr; + } else { + /* This value is the last one */ + list = mg_mk_str_n(list.p + list.len, 0); + } + + if (eq_val != NULL) { + /* Value has form "x=y", adjust pointers and lengths */ + /* so that val points to "x", and eq_val points to "y". */ + eq_val->len = 0; + eq_val->p = (const char *) memchr(val->p, '=', val->len); + if (eq_val->p != NULL) { + eq_val->p++; /* Skip over '=' character */ + eq_val->len = val->p + val->len - eq_val->p; + val->len = (eq_val->p - val->p) - 1; + } + } + } + + return list; +} + +int mg_match_prefix_n(const struct mg_str, const struct mg_str) WEAK; +int mg_match_prefix_n(const struct mg_str pattern, const struct mg_str str) { + const char *or_str; + size_t len, i = 0, j = 0; + int res; + + if ((or_str = (const char *) memchr(pattern.p, '|', pattern.len)) != NULL || + (or_str = (const char *) memchr(pattern.p, ',', pattern.len)) != NULL) { + struct mg_str pstr = {pattern.p, (size_t)(or_str - pattern.p)}; + res = mg_match_prefix_n(pstr, str); + if (res > 0) return res; + pstr.p = or_str + 1; + pstr.len = (pattern.p + pattern.len) - (or_str + 1); + return mg_match_prefix_n(pstr, str); + } + + for (; i < pattern.len; i++, j++) { + if (pattern.p[i] == '?' && j != str.len) { + continue; + } else if (pattern.p[i] == '$') { + return j == str.len ? (int) j : -1; + } else if (pattern.p[i] == '*') { + i++; + if (i < pattern.len && pattern.p[i] == '*') { + i++; + len = str.len - j; + } else { + len = 0; + while (j + len != str.len && str.p[j + len] != '/') { + len++; + } + } + if (i == pattern.len) { + return j + len; + } + do { + const struct mg_str pstr = {pattern.p + i, pattern.len - i}; + const struct mg_str sstr = {str.p + j + len, str.len - j - len}; + res = mg_match_prefix_n(pstr, sstr); + } while (res == -1 && len-- > 0); + return res == -1 ? -1 : (int) (j + res + len); + } else if (str_util_lowercase(&pattern.p[i]) != + str_util_lowercase(&str.p[j])) { + return -1; + } + } + return j; +} + +int mg_match_prefix(const char *, int, const char *) WEAK; +int mg_match_prefix(const char *pattern, int pattern_len, const char *str) { + const struct mg_str pstr = {pattern, (size_t) pattern_len}; + struct mg_str s = {str, 0}; + if (str != NULL) s.len = strlen(str); + return mg_match_prefix_n(pstr, s); +} + +#endif /* EXCLUDE_COMMON */ +#ifdef MG_MODULE_LINES +#line 1 "mongoose/src/tun.h" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +#ifndef CS_MONGOOSE_SRC_TUN_H_ +#define CS_MONGOOSE_SRC_TUN_H_ + +#if MG_ENABLE_TUN + +/* Amalgamated: #include "mongoose/src/net.h" */ +/* Amalgamated: #include "common/mg_str.h" */ + +#ifndef MG_TUN_RECONNECT_INTERVAL +#define MG_TUN_RECONNECT_INTERVAL 1 +#endif + +#define MG_TUN_PROTO_NAME "mg_tun" + +#define MG_TUN_DATA_FRAME 0x0 +#define MG_TUN_F_END_STREAM 0x1 + +/* + * MG TUN frame format is loosely based on HTTP/2. + * However since the communication happens via WebSocket + * there is no need to encode the frame length, since that's + * solved by WebSocket framing. + * + * TODO(mkm): Detailed description of the protocol. + */ +struct mg_tun_frame { + uint8_t type; + uint8_t flags; + uint32_t stream_id; /* opaque stream identifier */ + struct mg_str body; +}; + +struct mg_tun_ssl_opts { +#if MG_ENABLE_SSL + const char *ssl_cert; + const char *ssl_key; + const char *ssl_ca_cert; +#else + int dummy; /* some compilers don't like empty structs */ +#endif +}; + +struct mg_tun_client { + struct mg_mgr *mgr; + struct mg_iface *iface; + const char *disp_url; + struct mg_tun_ssl_opts ssl; + + uint32_t last_stream_id; /* stream id of most recently accepted connection */ + + struct mg_connection *disp; + struct mg_connection *listener; + struct mg_connection *reconnect; +}; + +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +struct mg_connection *mg_tun_bind_opt(struct mg_mgr *mgr, + const char *dispatcher, + MG_CB(mg_event_handler_t handler, + void *user_data), + struct mg_bind_opts opts); + +int mg_tun_parse_frame(void *data, size_t len, struct mg_tun_frame *frame); + +void mg_tun_send_frame(struct mg_connection *ws, uint32_t stream_id, + uint8_t type, uint8_t flags, struct mg_str msg); + +void mg_tun_destroy_client(struct mg_tun_client *client); + +#ifdef __cplusplus +} +#endif /* __cplusplus */ + +#endif /* MG_ENABLE_TUN */ + +#endif /* CS_MONGOOSE_SRC_TUN_H_ */ +#ifdef MG_MODULE_LINES +#line 1 "mongoose/src/net.c" +#endif +/* + * Copyright (c) 2014 Cesanta Software Limited + * All rights reserved + * + * This software is dual-licensed: you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. For the terms of this + * license, see <http://www.gnu.org/licenses/>. + * + * You are free to use this software under the terms of the GNU General + * Public License, but WITHOUT ANY WARRANTY; without even the implied + * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + * See the GNU General Public License for more details. + * + * Alternatively, you can license this software under a commercial + * license, as set out in <https://www.cesanta.com/license>. + */ + +/* Amalgamated: #include "common/cs_time.h" */ +/* Amalgamated: #include "mongoose/src/dns.h" */ +/* Amalgamated: #include "mongoose/src/internal.h" */ +/* Amalgamated: #include "mongoose/src/resolv.h" */ +/* Amalgamated: #include "mongoose/src/tun.h" */ +/* Amalgamated: #include "mongoose/src/util.h" */ + +#define MG_MAX_HOST_LEN 200 + +#define MG_COPY_COMMON_CONNECTION_OPTIONS(dst, src) \ + memcpy(dst, src, sizeof(*dst)); + +/* Which flags can be pre-set by the user at connection creation time. */ +#define _MG_ALLOWED_CONNECT_FLAGS_MASK \ + (MG_F_USER_1 | MG_F_USER_2 | MG_F_USER_3 | MG_F_USER_4 | MG_F_USER_5 | \ + MG_F_USER_6 | MG_F_WEBSOCKET_NO_DEFRAG | MG_F_ENABLE_BROADCAST) +/* Which flags should be modifiable by user's callbacks. */ +#define _MG_CALLBACK_MODIFIABLE_FLAGS_MASK \ + (MG_F_USER_1 | MG_F_USER_2 | MG_F_USER_3 | MG_F_USER_4 | MG_F_USER_5 | \ + MG_F_USER_6 | MG_F_WEBSOCKET_NO_DEFRAG | MG_F_SEND_AND_CLOSE | \ + MG_F_CLOSE_IMMEDIATELY | MG_F_IS_WEBSOCKET | MG_F_DELETE_CHUNK) + +#ifndef intptr_t +#define intptr_t long +#endif + +MG_INTERNAL void mg_add_conn(struct mg_mgr *mgr, struct mg_connection *c) { + DBG(("%p %p", mgr, c)); + c->mgr = mgr; + c->next = mgr->active_connections; + mgr->active_connections = c; + c->prev = NULL; + if (c->next != NULL) c->next->prev = c; + if (c->sock != INVALID_SOCKET) { + c->iface->vtable->add_conn(c); + } +} + +MG_INTERNAL void mg_remove_conn(struct mg_connection *conn) { + if (conn->prev == NULL) conn->mgr->active_connections = conn->next; + if (conn->prev) conn->prev->next = conn->next; + if (conn->next) conn->next->prev = conn->prev; + conn->prev = conn->next = NULL; + conn->iface->vtable->remove_conn(conn); +} + +MG_INTERNAL void mg_call(struct mg_connection *nc, + mg_event_handler_t ev_handler, void *user_data, int ev, + void *ev_data) { + static int nesting_level = 0; + nesting_level++; + if (ev_handler == NULL) { + /* + * If protocol handler is specified, call it. Otherwise, call user-specified + * event handler. + */ + ev_handler = nc->proto_handler ? nc->proto_handler : nc->handler; + } + if (ev != MG_EV_POLL) { + DBG(("%p %s ev=%d ev_data=%p flags=%lu rmbl=%d smbl=%d", nc, + ev_handler == nc->handler ? "user" : "proto", ev, ev_data, nc->flags, + (int) nc->recv_mbuf.len, (int) nc->send_mbuf.len)); + } + +#if !defined(NO_LIBC) && MG_ENABLE_HEXDUMP + if (nc->mgr->hexdump_file != NULL && ev != MG_EV_POLL && ev != MG_EV_RECV && + ev != MG_EV_SEND /* handled separately */) { + mg_hexdump_connection(nc, nc->mgr->hexdump_file, NULL, 0, ev); + } +#endif + if (ev_handler != NULL) { + unsigned long flags_before = nc->flags; + size_t recv_mbuf_before = nc->recv_mbuf.len, recved; + ev_handler(nc, ev, ev_data MG_UD_ARG(user_data)); + recved = (recv_mbuf_before - nc->recv_mbuf.len); + /* Prevent user handler from fiddling with system flags. */ + if (ev_handler == nc->handler && nc->flags != flags_before) { + nc->flags = (flags_before & ~_MG_CALLBACK_MODIFIABLE_FLAGS_MASK) | + (nc->flags & _MG_CALLBACK_MODIFIABLE_FLAGS_MASK); + } + /* It's important to not double-count recved bytes, and since mg_call can be + * called recursively (e.g. proto_handler invokes user handler), we keep + * track of recursion and only report received bytes at the top level. */ + if (nesting_level == 1 && recved > 0 && !(nc->flags & MG_F_UDP)) { + nc->iface->vtable->recved(nc, recved); + } + } + if (ev != MG_EV_POLL) { + DBG(("%p after %s flags=%lu rmbl=%d smbl=%d", nc, + ev_handler == nc->handler ? "user" : "proto", nc->flags, + (int) nc->recv_mbuf.len, (int) nc->send_mbuf.len)); + } + nesting_level--; +#if !MG_ENABLE_CALLBACK_USERDATA + (void) user_data; +#endif +} + +void mg_if_timer(struct mg_connection *c, double now) { + if (c->ev_timer_time > 0 && now >= c->ev_timer_time) { + double old_value = c->ev_timer_time; + c->ev_timer_time = 0; + mg_call(c, NULL, c->user_data, MG_EV_TIMER, &old_value); + } +} + +void mg_if_poll(struct mg_connection *nc, time_t now) { + if (!(nc->flags & MG_F_SSL) || (nc->flags & MG_F_SSL_HANDSHAKE_DONE)) { + mg_call(nc, NULL, nc->user_data, MG_EV_POLL, &now); + } +} + +void mg_destroy_conn(struct mg_connection *conn, int destroy_if) { + if (destroy_if) conn->iface->vtable->destroy_conn(conn); + if (conn->proto_data != NULL && conn->proto_data_destructor != NULL) { + conn->proto_data_destructor(conn->proto_data); + } +#if MG_ENABLE_SSL + mg_ssl_if_conn_free(conn); +#endif + mbuf_free(&conn->recv_mbuf); + mbuf_free(&conn->send_mbuf); + + memset(conn, 0, sizeof(*conn)); + MG_FREE(conn); +} + +void mg_close_conn(struct mg_connection *conn) { + DBG(("%p %lu %d", conn, conn->flags, conn->sock)); +#if MG_ENABLE_SSL + if (conn->flags & MG_F_SSL_HANDSHAKE_DONE) { + mg_ssl_if_conn_close_notify(conn); + } +#endif + mg_remove_conn(conn); + conn->iface->vtable->destroy_conn(conn); + mg_call(conn, NULL, conn->user_data, MG_EV_CLOSE, NULL); + mg_destroy_conn(conn, 0 /* destroy_if */); +} + +void mg_mgr_init(struct mg_mgr *m, void *user_data) { + struct mg_mgr_init_opts opts; + memset(&opts, 0, sizeof(opts)); + mg_mgr_init_opt(m, user_data, opts); +} + +void mg_mgr_init_opt(struct mg_mgr *m, void *user_data, + struct mg_mgr_init_opts opts) { + memset(m, 0, sizeof(*m)); +#if MG_ENABLE_BROADCAST + m->ctl[0] = m->ctl[1] = INVALID_SOCKET; +#endif + m->user_data = user_data; + +#ifdef _WIN32 + { + WSADATA data; + WSAStartup(MAKEWORD(2, 2), &data); + } +#elif defined(__unix__) + /* Ignore SIGPIPE signal, so if client cancels the request, it + * won't kill the whole process. */ + signal(SIGPIPE, SIG_IGN); +#endif + +#if MG_ENABLE_SSL + { + static int init_done; + if (!init_done) { + mg_ssl_if_init(); + init_done++; + } + } +#endif + { + int i; + if (opts.num_ifaces == 0) { + opts.num_ifaces = mg_num_ifaces; + opts.ifaces = mg_ifaces; + } + if (opts.main_iface != NULL) { + opts.ifaces[MG_MAIN_IFACE] = opts.main_iface; + } + m->num_ifaces = opts.num_ifaces; + m->ifaces = + (struct mg_iface **) MG_MALLOC(sizeof(*m->ifaces) * opts.num_ifaces); + for (i = 0; i < mg_num_ifaces; i++) { + m->ifaces[i] = mg_if_create_iface(opts.ifaces[i], m); + m->ifaces[i]->vtable->init(m->ifaces[i]); + } + } + if (opts.nameserver != NULL) { + m->nameserver = strdup(opts.nameserver); + } + DBG(("==================================")); + DBG(("init mgr=%p", m)); +} + +void mg_mgr_free(struct mg_mgr *m) { + struct mg_connection *conn, *tmp_conn; + + DBG(("%p", m)); + if (m == NULL) return; + /* Do one last poll, see https://github.com/cesanta/mongoose/issues/286 */ + mg_mgr_poll(m, 0); + +#if MG_ENABLE_BROADCAST + if (m->ctl[0] != INVALID_SOCKET) closesocket(m->ctl[0]); + if (m->ctl[1] != INVALID_SOCKET) closesocket(m->ctl[1]); + m->ctl[0] = m->ctl[1] = INVALID_SOCKET; +#endif + + for (conn = m->active_connections; conn != NULL; conn = tmp_conn) { + tmp_conn = conn->next; + mg_close_conn(conn); + } + + { + int i; + for (i = 0; i < m->num_ifaces; i++) { + m->ifaces[i]->vtable->free(m->ifaces[i]); + MG_FREE(m->ifaces[i]); + } + MG_FREE(m->ifaces); + } + + MG_FREE((char *) m->nameserver); +} + +time_t mg_mgr_poll(struct mg_mgr *m, int timeout_ms) { + int i; + time_t now = 0; /* oh GCC, seriously ? */ + + if (m->num_ifaces == 0) { + LOG(LL_ERROR, ("cannot poll: no interfaces")); + return 0; + } + + for (i = 0; i < m->num_ifaces; i++) { + now = m->ifaces[i]->vtable->poll(m->ifaces[i], timeout_ms); + } + return now; +} + +int mg_vprintf(struct mg_connection *nc, const char *fmt, va_list ap) { + char mem[MG_VPRINTF_BUFFER_SIZE], *buf = mem; + int len; + + if ((len = mg_avprintf(&buf, sizeof(mem), fmt, ap)) > 0) { + mg_send(nc, buf, len); + } + if (buf != mem && buf != NULL) { + MG_FREE(buf); /* LCOV_EXCL_LINE */ + } /* LCOV_EXCL_LINE */ + + return len; +} + +int mg_printf(struct mg_connection *conn, const char *fmt, ...) { + int len; + va_list ap; + va_start(ap, fmt); + len = mg_vprintf(conn, fmt, ap); + va_end(ap); + return len; +} + +#if MG_ENABLE_SYNC_RESOLVER +/* TODO(lsm): use non-blocking resolver */ +static int mg_resolve2(const char *host, struct in_addr *ina) { +#if MG_ENABLE_GETADDRINFO + int rv = 0; + struct addrinfo hints, *servinfo, *p; + struct sockaddr_in *h = NULL; + memset(&hints, 0, sizeof hints); + hints.ai_family = AF_INET; + hints.ai_socktype = SOCK_STREAM; + if ((rv = getaddrinfo(host, NULL, NULL, &servinfo)) != 0) { + DBG(("getaddrinfo(%s) failed: %s", host, strerror(mg_get_errno()))); + return 0; + } + for (p = servinfo; p != NULL; p = p->ai_next) { + memcpy(&h, &p->ai_addr, sizeof(struct sockaddr_in *)); + memcpy(ina, &h->sin_addr, sizeof(ina)); + } + freeaddrinfo(servinfo); + return 1; +#else + struct hostent *he; + if ((he = gethostbyname(host)) == NULL) { + DBG(("gethostbyname(%s) failed: %s", host, strerror(mg_get_errno()))); + } else { + memcpy(ina, he->h_addr_list[0], sizeof(*ina)); + return 1; + } + return 0; +#endif /* MG_ENABLE_GETADDRINFO */ +} + +int mg_resolve(const char *host, char *buf, size_t n) { + struct in_addr ad; + return mg_resolve2(host, &ad) ? snprintf(buf, n, "%s", inet_ntoa(ad)) : 0; +} +#endif /* MG_ENABLE_SYNC_RESOLVER */ + +MG_INTERNAL struct mg_connection *mg_create_connection_base( + struct mg_mgr *mgr, mg_event_handler_t callback, + struct mg_add_sock_opts opts) { + struct mg_connection *conn; + + if ((conn = (struct mg_connection *) MG_CALLOC(1, sizeof(*conn))) != NULL) { + conn->sock = INVALID_SOCKET; + conn->handler = callback; + conn->mgr = mgr; + conn->last_io_time = (time_t) mg_time(); + conn->iface = + (opts.iface != NULL ? opts.iface : mgr->ifaces[MG_MAIN_IFACE]); + conn->flags = opts.flags & _MG_ALLOWED_CONNECT_FLAGS_MASK; + conn->user_data = opts.user_data; + /* + * SIZE_MAX is defined as a long long constant in + * system headers on some platforms and so it + * doesn't compile with pedantic ansi flags. + */ + conn->recv_mbuf_limit = ~0; + } else { + MG_SET_PTRPTR(opts.error_string, "failed to create connection"); + } + + return conn; +} + +MG_INTERNAL struct mg_connection *mg_create_connection( + struct mg_mgr *mgr, mg_event_handler_t callback, + struct mg_add_sock_opts opts) { + struct mg_connection *conn = mg_create_connection_base(mgr, callback, opts); + + if (conn != NULL && !conn->iface->vtable->create_conn(conn)) { + MG_FREE(conn); + conn = NULL; + } + if (conn == NULL) { + MG_SET_PTRPTR(opts.error_string, "failed to init connection"); + } + + return conn; +} + +/* + * Address format: [PROTO://][HOST]:PORT + * + * HOST could be IPv4/IPv6 address or a host name. + * `host` is a destination buffer to hold parsed HOST part. Should be at least + * MG_MAX_HOST_LEN bytes long. + * `proto` is a returned socket type, either SOCK_STREAM or SOCK_DGRAM + * + * Return: + * -1 on parse error + * 0 if HOST needs DNS lookup + * >0 length of the address string + */ +MG_INTERNAL int mg_parse_address(const char *str, union socket_address *sa, + int *proto, char *host, size_t host_len) { + unsigned int a, b, c, d, port = 0; + int ch, len = 0; +#if MG_ENABLE_IPV6 + char buf[100]; +#endif + + /* + * MacOS needs that. If we do not zero it, subsequent bind() will fail. + * Also, all-zeroes in the socket address means binding to all addresses + * for both IPv4 and IPv6 (INADDR_ANY and IN6ADDR_ANY_INIT). + */ + memset(sa, 0, sizeof(*sa)); + sa->sin.sin_family = AF_INET; + + *proto = SOCK_STREAM; + + if (strncmp(str, "udp://", 6) == 0) { + str += 6; + *proto = SOCK_DGRAM; + } else if (strncmp(str, "tcp://", 6) == 0) { + str += 6; + } + + if (sscanf(str, "%u.%u.%u.%u:%u%n", &a, &b, &c, &d, &port, &len) == 5) { + /* Bind to a specific IPv4 address, e.g. 192.168.1.5:8080 */ + sa->sin.sin_addr.s_addr = + htonl(((uint32_t) a << 24) | ((uint32_t) b << 16) | c << 8 | d); + sa->sin.sin_port = htons((uint16_t) port); +#if MG_ENABLE_IPV6 + } else if (sscanf(str, "[%99[^]]]:%u%n", buf, &port, &len) == 2 && + inet_pton(AF_INET6, buf, &sa->sin6.sin6_addr)) { + /* IPv6 address, e.g. [3ffe:2a00:100:7031::1]:8080 */ + sa->sin6.sin6_family = AF_INET6; + sa->sin.sin_port = htons((uint16_t) port); +#endif +#if MG_ENABLE_ASYNC_RESOLVER + } else if (strlen(str) < host_len && + sscanf(str, "%[^ :]:%u%n", host, &port, &len) == 2) { + sa->sin.sin_port = htons((uint16_t) port); + if (mg_resolve_from_hosts_file(host, sa) != 0) { + /* + * if resolving from hosts file failed and the host + * we are trying to resolve is `localhost` - we should + * try to resolve it using `gethostbyname` and do not try + * to resolve it via DNS server if gethostbyname has failed too + */ + if (mg_ncasecmp(host, "localhost", 9) != 0) { + return 0; + } + +#if MG_ENABLE_SYNC_RESOLVER + if (!mg_resolve2(host, &sa->sin.sin_addr)) { + return -1; + } +#else + return -1; +#endif + } +#endif + } else if (sscanf(str, ":%u%n", &port, &len) == 1 || + sscanf(str, "%u%n", &port, &len) == 1) { + /* If only port is specified, bind to IPv4, INADDR_ANY */ + sa->sin.sin_port = htons((uint16_t) port); + } else { + return -1; + } + + /* Required for MG_ENABLE_ASYNC_RESOLVER=0 */ + (void) host; + (void) host_len; + + ch = str[len]; /* Character that follows the address */ + return port < 0xffffUL && (ch == '\0' || ch == ',' || isspace(ch)) ? len : -1; +} + +struct mg_connection *mg_if_accept_new_conn(struct mg_connection *lc) { + struct mg_add_sock_opts opts; + struct mg_connection *nc; + memset(&opts, 0, sizeof(opts)); + nc = mg_create_connection(lc->mgr, lc->handler, opts); + if (nc == NULL) return NULL; + nc->listener = lc; + nc->proto_handler = lc->proto_handler; + nc->user_data = lc->user_data; + nc->recv_mbuf_limit = lc->recv_mbuf_limit; + nc->iface = lc->iface; + if (lc->flags & MG_F_SSL) nc->flags |= MG_F_SSL; + mg_add_conn(nc->mgr, nc); + DBG(("%p %p %d %d", lc, nc, nc->sock, (int) nc->flags)); + return nc; +} + +void mg_if_accept_tcp_cb(struct mg_connection *nc, union socket_address *sa, + size_t sa_len) { + (void) sa_len; + nc->sa = *sa; + mg_call(nc, NULL, nc->user_data, MG_EV_ACCEPT, &nc->sa); +} + +void mg_send(struct mg_connection *nc, const void *buf, int len) { + nc->last_io_time = (time_t) mg_time(); + if (nc->flags & MG_F_UDP) { + nc->iface->vtable->udp_send(nc, buf, len); + } else { + nc->iface->vtable->tcp_send(nc, buf, len); + } +} + +void mg_if_sent_cb(struct mg_connection *nc, int num_sent) { + DBG(("%p %d", nc, num_sent)); +#if !defined(NO_LIBC) && MG_ENABLE_HEXDUMP + if (nc->mgr && nc->mgr->hexdump_file != NULL) { + char *buf = nc->send_mbuf.buf; + mg_hexdump_connection(nc, nc->mgr->hexdump_file, buf, num_sent, MG_EV_SEND); + } +#endif + if (num_sent < 0) { + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + } else { + mbuf_remove(&nc->send_mbuf, num_sent); + mbuf_trim(&nc->send_mbuf); + } + mg_call(nc, NULL, nc->user_data, MG_EV_SEND, &num_sent); +} + +MG_INTERNAL void mg_recv_common(struct mg_connection *nc, void *buf, int len, + int own) { + DBG(("%p %d %u", nc, len, (unsigned int) nc->recv_mbuf.len)); + +#if !defined(NO_LIBC) && MG_ENABLE_HEXDUMP + if (nc->mgr && nc->mgr->hexdump_file != NULL) { + mg_hexdump_connection(nc, nc->mgr->hexdump_file, buf, len, MG_EV_RECV); + } +#endif + + if (nc->flags & MG_F_CLOSE_IMMEDIATELY) { + DBG(("%p discarded %d bytes", nc, len)); + /* + * This connection will not survive next poll. Do not deliver events, + * send data to /dev/null without acking. + */ + if (own) { + MG_FREE(buf); + } + return; + } + nc->last_io_time = (time_t) mg_time(); + if (!own) { + mbuf_append(&nc->recv_mbuf, buf, len); + } else if (nc->recv_mbuf.len == 0) { + /* Adopt buf as recv_mbuf's backing store. */ + mbuf_free(&nc->recv_mbuf); + nc->recv_mbuf.buf = (char *) buf; + nc->recv_mbuf.size = nc->recv_mbuf.len = len; + } else { + mbuf_append(&nc->recv_mbuf, buf, len); + MG_FREE(buf); + } + mg_call(nc, NULL, nc->user_data, MG_EV_RECV, &len); +} + +void mg_if_recv_tcp_cb(struct mg_connection *nc, void *buf, int len, int own) { + mg_recv_common(nc, buf, len, own); +} + +void mg_if_recv_udp_cb(struct mg_connection *nc, void *buf, int len, + union socket_address *sa, size_t sa_len) { + assert(nc->flags & MG_F_UDP); + DBG(("%p %u", nc, (unsigned int) len)); + if (nc->flags & MG_F_LISTENING) { + struct mg_connection *lc = nc; + /* + * Do we have an existing connection for this source? + * This is very inefficient for long connection lists. + */ + for (nc = mg_next(lc->mgr, NULL); nc != NULL; nc = mg_next(lc->mgr, nc)) { + if (memcmp(&nc->sa.sa, &sa->sa, sa_len) == 0 && nc->listener == lc) { + break; + } + } + if (nc == NULL) { + struct mg_add_sock_opts opts; + memset(&opts, 0, sizeof(opts)); + /* Create fake connection w/out sock initialization */ + nc = mg_create_connection_base(lc->mgr, lc->handler, opts); + if (nc != NULL) { + nc->sock = lc->sock; + nc->listener = lc; + nc->sa = *sa; + nc->proto_handler = lc->proto_handler; + nc->user_data = lc->user_data; + nc->recv_mbuf_limit = lc->recv_mbuf_limit; + nc->flags = MG_F_UDP; + /* + * Long-lived UDP "connections" i.e. interactions that involve more + * than one request and response are rare, most are transactional: + * response is sent and the "connection" is closed. Or - should be. + * But users (including ourselves) tend to forget about that part, + * because UDP is connectionless and one does not think about + * processing a UDP request as handling a connection that needs to be + * closed. Thus, we begin with SEND_AND_CLOSE flag set, which should + * be a reasonable default for most use cases, but it is possible to + * turn it off the connection should be kept alive after processing. + */ + nc->flags |= MG_F_SEND_AND_CLOSE; + mg_add_conn(lc->mgr, nc); + mg_call(nc, NULL, nc->user_data, MG_EV_ACCEPT, &nc->sa); + } else { + DBG(("OOM")); + /* No return here, we still need to drop on the floor */ + } + } + } + if (nc != NULL) { + mg_recv_common(nc, buf, len, 1); + } else { + /* Drop on the floor. */ + MG_FREE(buf); + nc->iface->vtable->recved(nc, len); + } +} + +/* + * Schedules an async connect for a resolved address and proto. + * Called from two places: `mg_connect_opt()` and from async resolver. + * When called from the async resolver, it must trigger `MG_EV_CONNECT` event + * with a failure flag to indicate connection failure. + */ +MG_INTERNAL struct mg_connection *mg_do_connect(struct mg_connection *nc, + int proto, + union socket_address *sa) { + DBG(("%p %s://%s:%hu", nc, proto == SOCK_DGRAM ? "udp" : "tcp", + inet_ntoa(sa->sin.sin_addr), ntohs(sa->sin.sin_port))); + + nc->flags |= MG_F_CONNECTING; + if (proto == SOCK_DGRAM) { + nc->iface->vtable->connect_udp(nc); + } else { + nc->iface->vtable->connect_tcp(nc, sa); + } + mg_add_conn(nc->mgr, nc); + return nc; +} + +void mg_if_connect_cb(struct mg_connection *nc, int err) { + DBG(("%p connect, err=%d", nc, err)); + nc->flags &= ~MG_F_CONNECTING; + if (err != 0) { + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + } + mg_call(nc, NULL, nc->user_data, MG_EV_CONNECT, &err); +} + +#if MG_ENABLE_ASYNC_RESOLVER +/* + * Callback for the async resolver on mg_connect_opt() call. + * Main task of this function is to trigger MG_EV_CONNECT event with + * either failure (and dealloc the connection) + * or success (and proceed with connect() + */ +static void resolve_cb(struct mg_dns_message *msg, void *data, + enum mg_resolve_err e) { + struct mg_connection *nc = (struct mg_connection *) data; + int i; + int failure = -1; + + nc->flags &= ~MG_F_RESOLVING; + if (msg != NULL) { + /* + * Take the first DNS A answer and run... + */ + for (i = 0; i < msg->num_answers; i++) { + if (msg->answers[i].rtype == MG_DNS_A_RECORD) { + /* + * Async resolver guarantees that there is at least one answer. + * TODO(lsm): handle IPv6 answers too + */ + mg_dns_parse_record_data(msg, &msg->answers[i], &nc->sa.sin.sin_addr, + 4); + mg_do_connect(nc, nc->flags & MG_F_UDP ? SOCK_DGRAM : SOCK_STREAM, + &nc->sa); + return; + } + } + } + + if (e == MG_RESOLVE_TIMEOUT) { + double now = mg_time(); + mg_call(nc, NULL, nc->user_data, MG_EV_TIMER, &now); + } + + /* + * If we get there was no MG_DNS_A_RECORD in the answer + */ + mg_call(nc, NULL, nc->user_data, MG_EV_CONNECT, &failure); + mg_call(nc, NULL, nc->user_data, MG_EV_CLOSE, NULL); + mg_destroy_conn(nc, 1 /* destroy_if */); +} +#endif + +struct mg_connection *mg_connect(struct mg_mgr *mgr, const char *address, + MG_CB(mg_event_handler_t callback, + void *user_data)) { + struct mg_connect_opts opts; + memset(&opts, 0, sizeof(opts)); + return mg_connect_opt(mgr, address, MG_CB(callback, user_data), opts); +} + +struct mg_connection *mg_connect_opt(struct mg_mgr *mgr, const char *address, + MG_CB(mg_event_handler_t callback, + void *user_data), + struct mg_connect_opts opts) { + struct mg_connection *nc = NULL; + int proto, rc; + struct mg_add_sock_opts add_sock_opts; + char host[MG_MAX_HOST_LEN]; + + MG_COPY_COMMON_CONNECTION_OPTIONS(&add_sock_opts, &opts); + + if ((nc = mg_create_connection(mgr, callback, add_sock_opts)) == NULL) { + return NULL; + } + + if ((rc = mg_parse_address(address, &nc->sa, &proto, host, sizeof(host))) < + 0) { + /* Address is malformed */ + MG_SET_PTRPTR(opts.error_string, "cannot parse address"); + mg_destroy_conn(nc, 1 /* destroy_if */); + return NULL; + } + + nc->flags |= opts.flags & _MG_ALLOWED_CONNECT_FLAGS_MASK; + nc->flags |= (proto == SOCK_DGRAM) ? MG_F_UDP : 0; +#if MG_ENABLE_CALLBACK_USERDATA + nc->user_data = user_data; +#else + nc->user_data = opts.user_data; +#endif + +#if MG_ENABLE_SSL + DBG(("%p %s %s,%s,%s", nc, address, (opts.ssl_cert ? opts.ssl_cert : "-"), + (opts.ssl_key ? opts.ssl_key : "-"), + (opts.ssl_ca_cert ? opts.ssl_ca_cert : "-"))); + + if (opts.ssl_cert != NULL || opts.ssl_ca_cert != NULL || + opts.ssl_psk_identity != NULL) { + const char *err_msg = NULL; + struct mg_ssl_if_conn_params params; + if (nc->flags & MG_F_UDP) { + MG_SET_PTRPTR(opts.error_string, "SSL for UDP is not supported"); + mg_destroy_conn(nc, 1 /* destroy_if */); + return NULL; + } + memset(¶ms, 0, sizeof(params)); + params.cert = opts.ssl_cert; + params.key = opts.ssl_key; + params.ca_cert = opts.ssl_ca_cert; + params.cipher_suites = opts.ssl_cipher_suites; + params.psk_identity = opts.ssl_psk_identity; + params.psk_key = opts.ssl_psk_key; + if (opts.ssl_ca_cert != NULL) { + if (opts.ssl_server_name != NULL) { + if (strcmp(opts.ssl_server_name, "*") != 0) { + params.server_name = opts.ssl_server_name; + } + } else if (rc == 0) { /* If it's a DNS name, use host. */ + params.server_name = host; + } + } + if (mg_ssl_if_conn_init(nc, ¶ms, &err_msg) != MG_SSL_OK) { + MG_SET_PTRPTR(opts.error_string, err_msg); + mg_destroy_conn(nc, 1 /* destroy_if */); + return NULL; + } + nc->flags |= MG_F_SSL; + } +#endif /* MG_ENABLE_SSL */ + + if (rc == 0) { +#if MG_ENABLE_ASYNC_RESOLVER + /* + * DNS resolution is required for host. + * mg_parse_address() fills port in nc->sa, which we pass to resolve_cb() + */ + struct mg_connection *dns_conn = NULL; + struct mg_resolve_async_opts o; + memset(&o, 0, sizeof(o)); + o.dns_conn = &dns_conn; + o.nameserver = opts.nameserver; + if (mg_resolve_async_opt(nc->mgr, host, MG_DNS_A_RECORD, resolve_cb, nc, + o) != 0) { + MG_SET_PTRPTR(opts.error_string, "cannot schedule DNS lookup"); + mg_destroy_conn(nc, 1 /* destroy_if */); + return NULL; + } + nc->priv_2 = dns_conn; + nc->flags |= MG_F_RESOLVING; + return nc; +#else + MG_SET_PTRPTR(opts.error_string, "Resolver is disabled"); + mg_destroy_conn(nc, 1 /* destroy_if */); + return NULL; +#endif + } else { + /* Address is parsed and resolved to IP. proceed with connect() */ + return mg_do_connect(nc, proto, &nc->sa); + } +} + +struct mg_connection *mg_bind(struct mg_mgr *srv, const char *address, + MG_CB(mg_event_handler_t event_handler, + void *user_data)) { + struct mg_bind_opts opts; + memset(&opts, 0, sizeof(opts)); + return mg_bind_opt(srv, address, MG_CB(event_handler, user_data), opts); +} + +struct mg_connection *mg_bind_opt(struct mg_mgr *mgr, const char *address, + MG_CB(mg_event_handler_t callback, + void *user_data), + struct mg_bind_opts opts) { + union socket_address sa; + struct mg_connection *nc = NULL; + int proto, rc; + struct mg_add_sock_opts add_sock_opts; + char host[MG_MAX_HOST_LEN]; + +#if MG_ENABLE_CALLBACK_USERDATA + opts.user_data = user_data; +#endif + + MG_COPY_COMMON_CONNECTION_OPTIONS(&add_sock_opts, &opts); + +#if MG_ENABLE_TUN + if (mg_strncmp(mg_mk_str(address), mg_mk_str("ws://"), 5) == 0 || + mg_strncmp(mg_mk_str(address), mg_mk_str("wss://"), 6) == 0) { + return mg_tun_bind_opt(mgr, address, MG_CB(callback, user_data), opts); + } +#endif + + if (mg_parse_address(address, &sa, &proto, host, sizeof(host)) <= 0) { + MG_SET_PTRPTR(opts.error_string, "cannot parse address"); + return NULL; + } + + nc = mg_create_connection(mgr, callback, add_sock_opts); + if (nc == NULL) { + return NULL; + } + + nc->sa = sa; + nc->flags |= MG_F_LISTENING; + if (proto == SOCK_DGRAM) nc->flags |= MG_F_UDP; + +#if MG_ENABLE_SSL + DBG(("%p %s %s,%s,%s", nc, address, (opts.ssl_cert ? opts.ssl_cert : "-"), + (opts.ssl_key ? opts.ssl_key : "-"), + (opts.ssl_ca_cert ? opts.ssl_ca_cert : "-"))); + + if (opts.ssl_cert != NULL || opts.ssl_ca_cert != NULL) { + const char *err_msg = NULL; + struct mg_ssl_if_conn_params params; + if (nc->flags & MG_F_UDP) { + MG_SET_PTRPTR(opts.error_string, "SSL for UDP is not supported"); + mg_destroy_conn(nc, 1 /* destroy_if */); + return NULL; + } + memset(¶ms, 0, sizeof(params)); + params.cert = opts.ssl_cert; + params.key = opts.ssl_key; + params.ca_cert = opts.ssl_ca_cert; + params.cipher_suites = opts.ssl_cipher_suites; + if (mg_ssl_if_conn_init(nc, ¶ms, &err_msg) != MG_SSL_OK) { + MG_SET_PTRPTR(opts.error_string, err_msg); + mg_destroy_conn(nc, 1 /* destroy_if */); + return NULL; + } + nc->flags |= MG_F_SSL; + } +#endif /* MG_ENABLE_SSL */ + + if (nc->flags & MG_F_UDP) { + rc = nc->iface->vtable->listen_udp(nc, &nc->sa); + } else { + rc = nc->iface->vtable->listen_tcp(nc, &nc->sa); + } + if (rc != 0) { + DBG(("Failed to open listener: %d", rc)); + MG_SET_PTRPTR(opts.error_string, "failed to open listener"); + mg_destroy_conn(nc, 1 /* destroy_if */); + return NULL; + } + mg_add_conn(nc->mgr, nc); + + return nc; +} + +struct mg_connection *mg_next(struct mg_mgr *s, struct mg_connection *conn) { + return conn == NULL ? s->active_connections : conn->next; +} + +#if MG_ENABLE_BROADCAST +void mg_broadcast(struct mg_mgr *mgr, mg_event_handler_t cb, void *data, + size_t len) { + struct ctl_msg ctl_msg; + + /* + * Mongoose manager has a socketpair, `struct mg_mgr::ctl`, + * where `mg_broadcast()` pushes the message. + * `mg_mgr_poll()` wakes up, reads a message from the socket pair, and calls + * specified callback for each connection. Thus the callback function executes + * in event manager thread. + */ + if (mgr->ctl[0] != INVALID_SOCKET && data != NULL && + len < sizeof(ctl_msg.message)) { + size_t dummy; + + ctl_msg.callback = cb; + memcpy(ctl_msg.message, data, len); + dummy = MG_SEND_FUNC(mgr->ctl[0], (char *) &ctl_msg, + offsetof(struct ctl_msg, message) + len, 0); + dummy = MG_RECV_FUNC(mgr->ctl[0], (char *) &len, 1, 0); + (void) dummy; /* https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25509 */ + } +} +#endif /* MG_ENABLE_BROADCAST */ + +static int isbyte(int n) { + return n >= 0 && n <= 255; +} + +static int parse_net(const char *spec, uint32_t *net, uint32_t *mask) { + int n, a, b, c, d, slash = 32, len = 0; + + if ((sscanf(spec, "%d.%d.%d.%d/%d%n", &a, &b, &c, &d, &slash, &n) == 5 || + sscanf(spec, "%d.%d.%d.%d%n", &a, &b, &c, &d, &n) == 4) && + isbyte(a) && isbyte(b) && isbyte(c) && isbyte(d) && slash >= 0 && + slash < 33) { + len = n; + *net = + ((uint32_t) a << 24) | ((uint32_t) b << 16) | ((uint32_t) c << 8) | d; + *mask = slash ? 0xffffffffU << (32 - slash) : 0; + } + + return len; +} + +int mg_check_ip_acl(const char *acl, uint32_t remote_ip) { + int allowed, flag; + uint32_t net, mask; + struct mg_str vec; + + /* If any ACL is set, deny by default */ + allowed = (acl == NULL || *acl == '\0') ? '+' : '-'; + + while ((acl = mg_next_comma_list_entry(acl, &vec, NULL)) != NULL) { + flag = vec.p[0]; + if ((flag != '+' && flag != '-') || + parse_net(&vec.p[1], &net, &mask) == 0) { + return -1; + } + + if (net == (remote_ip & mask)) { + allowed = flag; + } + } + + DBG(("%08x %c", (unsigned int) remote_ip, allowed)); + return allowed == '+'; +} + +/* Move data from one connection to another */ +void mg_forward(struct mg_connection *from, struct mg_connection *to) { + mg_send(to, from->recv_mbuf.buf, from->recv_mbuf.len); + mbuf_remove(&from->recv_mbuf, from->recv_mbuf.len); +} + +double mg_set_timer(struct mg_connection *c, double timestamp) { + double result = c->ev_timer_time; + c->ev_timer_time = timestamp; + /* + * If this connection is resolving, it's not in the list of active + * connections, so not processed yet. It has a DNS resolver connection + * linked to it. Set up a timer for the DNS connection. + */ + DBG(("%p %p %d -> %lu", c, c->priv_2, (c->flags & MG_F_RESOLVING ? 1 : 0), + (unsigned long) timestamp)); + if ((c->flags & MG_F_RESOLVING) && c->priv_2 != NULL) { + ((struct mg_connection *) c->priv_2)->ev_timer_time = timestamp; + } + return result; +} + +void mg_sock_set(struct mg_connection *nc, sock_t sock) { + if (sock != INVALID_SOCKET) { + nc->iface->vtable->sock_set(nc, sock); + } +} + +void mg_if_get_conn_addr(struct mg_connection *nc, int remote, + union socket_address *sa) { + nc->iface->vtable->get_conn_addr(nc, remote, sa); +} + +struct mg_connection *mg_add_sock_opt(struct mg_mgr *s, sock_t sock, + MG_CB(mg_event_handler_t callback, + void *user_data), + struct mg_add_sock_opts opts) { +#if MG_ENABLE_CALLBACK_USERDATA + opts.user_data = user_data; +#endif + + struct mg_connection *nc = mg_create_connection_base(s, callback, opts); + if (nc != NULL) { + mg_sock_set(nc, sock); + mg_add_conn(nc->mgr, nc); + } + return nc; +} + +struct mg_connection *mg_add_sock(struct mg_mgr *s, sock_t sock, + MG_CB(mg_event_handler_t callback, + void *user_data)) { + struct mg_add_sock_opts opts; + memset(&opts, 0, sizeof(opts)); + return mg_add_sock_opt(s, sock, MG_CB(callback, user_data), opts); +} + +double mg_time(void) { + return cs_time(); +} +#ifdef MG_MODULE_LINES +#line 1 "mongoose/src/net_if_socket.h" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +#ifndef CS_MONGOOSE_SRC_NET_IF_SOCKET_H_ +#define CS_MONGOOSE_SRC_NET_IF_SOCKET_H_ + +/* Amalgamated: #include "mongoose/src/net_if.h" */ + +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +#ifndef MG_ENABLE_NET_IF_SOCKET +#define MG_ENABLE_NET_IF_SOCKET MG_NET_IF == MG_NET_IF_SOCKET +#endif + +extern const struct mg_iface_vtable mg_socket_iface_vtable; + +#ifdef __cplusplus +} +#endif /* __cplusplus */ + +#endif /* CS_MONGOOSE_SRC_NET_IF_SOCKET_H_ */ +#ifdef MG_MODULE_LINES +#line 1 "mongoose/src/net_if_tun.h" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +#ifndef CS_MONGOOSE_SRC_NET_IF_TUN_H_ +#define CS_MONGOOSE_SRC_NET_IF_TUN_H_ + +#if MG_ENABLE_TUN + +/* Amalgamated: #include "mongoose/src/net_if.h" */ + +struct mg_tun_client; + +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +extern const struct mg_iface_vtable mg_tun_iface_vtable; + +struct mg_connection *mg_tun_if_find_conn(struct mg_tun_client *client, + uint32_t stream_id); + +#ifdef __cplusplus +} +#endif /* __cplusplus */ + +#endif /* MG_ENABLE_TUN */ + +#endif /* CS_MONGOOSE_SRC_NET_IF_TUN_H_ */ +#ifdef MG_MODULE_LINES +#line 1 "mongoose/src/net_if_socks.h" +#endif +/* +* Copyright (c) 2014-2017 Cesanta Software Limited +* All rights reserved +*/ + +#ifndef CS_MONGOOSE_SRC_NET_IF_SOCKS_H_ +#define CS_MONGOOSE_SRC_NET_IF_SOCKS_H_ + +#if MG_ENABLE_SOCKS +/* Amalgamated: #include "mongoose/src/net_if.h" */ + +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +extern const struct mg_iface_vtable mg_socks_iface_vtable; + +#ifdef __cplusplus +} +#endif /* __cplusplus */ +#endif /* MG_ENABLE_SOCKS */ +#endif /* CS_MONGOOSE_SRC_NET_IF_SOCKS_H_ */ +#ifdef MG_MODULE_LINES +#line 1 "mongoose/src/net_if.c" +#endif +/* Amalgamated: #include "mongoose/src/net_if.h" */ +/* Amalgamated: #include "mongoose/src/internal.h" */ +/* Amalgamated: #include "mongoose/src/net_if_socket.h" */ +/* Amalgamated: #include "mongoose/src/net_if_tun.h" */ + +extern const struct mg_iface_vtable mg_default_iface_vtable; + +const struct mg_iface_vtable *mg_ifaces[] = { + &mg_default_iface_vtable, +#if MG_ENABLE_TUN + &mg_tun_iface_vtable, +#endif +}; + +int mg_num_ifaces = (int) (sizeof(mg_ifaces) / sizeof(mg_ifaces[0])); + +struct mg_iface *mg_if_create_iface(const struct mg_iface_vtable *vtable, + struct mg_mgr *mgr) { + struct mg_iface *iface = (struct mg_iface *) MG_CALLOC(1, sizeof(*iface)); + iface->mgr = mgr; + iface->data = NULL; + iface->vtable = vtable; + return iface; +} + +struct mg_iface *mg_find_iface(struct mg_mgr *mgr, + const struct mg_iface_vtable *vtable, + struct mg_iface *from) { + int i = 0; + if (from != NULL) { + for (i = 0; i < mgr->num_ifaces; i++) { + if (mgr->ifaces[i] == from) { + i++; + break; + } + } + } + + for (; i < mgr->num_ifaces; i++) { + if (mgr->ifaces[i]->vtable == vtable) { + return mgr->ifaces[i]; + } + } + return NULL; +} +#ifdef MG_MODULE_LINES +#line 1 "mongoose/src/net_if_socket.c" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +#if MG_ENABLE_NET_IF_SOCKET + +/* Amalgamated: #include "mongoose/src/net_if_socket.h" */ +/* Amalgamated: #include "mongoose/src/internal.h" */ +/* Amalgamated: #include "mongoose/src/util.h" */ + +#define MG_TCP_RECV_BUFFER_SIZE 1024 +#define MG_UDP_RECV_BUFFER_SIZE 1500 + +static sock_t mg_open_listening_socket(union socket_address *sa, int type, + int proto); +#if MG_ENABLE_SSL +static void mg_ssl_begin(struct mg_connection *nc); +#endif + +void mg_set_non_blocking_mode(sock_t sock) { +#ifdef _WIN32 + unsigned long on = 1; + ioctlsocket(sock, FIONBIO, &on); +#else + int flags = fcntl(sock, F_GETFL, 0); + fcntl(sock, F_SETFL, flags | O_NONBLOCK); +#endif +} + +static int mg_is_error(void) { + int err = mg_get_errno(); + return err != EINPROGRESS && err != EWOULDBLOCK +#ifndef WINCE + && err != EAGAIN && err != EINTR +#endif +#ifdef _WIN32 + && WSAGetLastError() != WSAEINTR && WSAGetLastError() != WSAEWOULDBLOCK +#endif + ; +} + +void mg_socket_if_connect_tcp(struct mg_connection *nc, + const union socket_address *sa) { + int rc, proto = 0; + nc->sock = socket(AF_INET, SOCK_STREAM, proto); + if (nc->sock == INVALID_SOCKET) { + nc->err = mg_get_errno() ? mg_get_errno() : 1; + return; + } +#if !defined(MG_ESP8266) + mg_set_non_blocking_mode(nc->sock); +#endif + rc = connect(nc->sock, &sa->sa, sizeof(sa->sin)); + nc->err = rc < 0 && mg_is_error() ? mg_get_errno() : 0; + DBG(("%p sock %d rc %d errno %d err %d", nc, nc->sock, rc, mg_get_errno(), + nc->err)); +} + +void mg_socket_if_connect_udp(struct mg_connection *nc) { + nc->sock = socket(AF_INET, SOCK_DGRAM, 0); + if (nc->sock == INVALID_SOCKET) { + nc->err = mg_get_errno() ? mg_get_errno() : 1; + return; + } + if (nc->flags & MG_F_ENABLE_BROADCAST) { + int optval = 1; + setsockopt(nc->sock, SOL_SOCKET, SO_BROADCAST, (const char *) &optval, + sizeof(optval)); + } + nc->err = 0; +} + +int mg_socket_if_listen_tcp(struct mg_connection *nc, + union socket_address *sa) { + int proto = 0; + sock_t sock = mg_open_listening_socket(sa, SOCK_STREAM, proto); + if (sock == INVALID_SOCKET) { + return (mg_get_errno() ? mg_get_errno() : 1); + } + mg_sock_set(nc, sock); + return 0; +} + +int mg_socket_if_listen_udp(struct mg_connection *nc, + union socket_address *sa) { + sock_t sock = mg_open_listening_socket(sa, SOCK_DGRAM, 0); + if (sock == INVALID_SOCKET) return (mg_get_errno() ? mg_get_errno() : 1); + mg_sock_set(nc, sock); + return 0; +} + +void mg_socket_if_tcp_send(struct mg_connection *nc, const void *buf, + size_t len) { + mbuf_append(&nc->send_mbuf, buf, len); +} + +void mg_socket_if_udp_send(struct mg_connection *nc, const void *buf, + size_t len) { + mbuf_append(&nc->send_mbuf, buf, len); +} + +void mg_socket_if_recved(struct mg_connection *nc, size_t len) { + (void) nc; + (void) len; +} + +int mg_socket_if_create_conn(struct mg_connection *nc) { + (void) nc; + return 1; +} + +void mg_socket_if_destroy_conn(struct mg_connection *nc) { + if (nc->sock == INVALID_SOCKET) return; + if (!(nc->flags & MG_F_UDP)) { + closesocket(nc->sock); + } else { + /* Only close outgoing UDP sockets or listeners. */ + if (nc->listener == NULL) closesocket(nc->sock); + } + nc->sock = INVALID_SOCKET; +} + +static int mg_accept_conn(struct mg_connection *lc) { + struct mg_connection *nc; + union socket_address sa; + socklen_t sa_len = sizeof(sa); + /* NOTE(lsm): on Windows, sock is always > FD_SETSIZE */ + sock_t sock = accept(lc->sock, &sa.sa, &sa_len); + if (sock == INVALID_SOCKET) { + if (mg_is_error()) DBG(("%p: failed to accept: %d", lc, mg_get_errno())); + return 0; + } + nc = mg_if_accept_new_conn(lc); + if (nc == NULL) { + closesocket(sock); + return 0; + } + DBG(("%p conn from %s:%d", nc, inet_ntoa(sa.sin.sin_addr), + ntohs(sa.sin.sin_port))); + mg_sock_set(nc, sock); +#if MG_ENABLE_SSL + if (lc->flags & MG_F_SSL) { + if (mg_ssl_if_conn_accept(nc, lc) != MG_SSL_OK) mg_close_conn(nc); + } else +#endif + { + mg_if_accept_tcp_cb(nc, &sa, sa_len); + } + return 1; +} + +/* 'sa' must be an initialized address to bind to */ +static sock_t mg_open_listening_socket(union socket_address *sa, int type, + int proto) { + socklen_t sa_len = + (sa->sa.sa_family == AF_INET) ? sizeof(sa->sin) : sizeof(sa->sin6); + sock_t sock = INVALID_SOCKET; +#if !MG_LWIP + int on = 1; +#endif + + if ((sock = socket(sa->sa.sa_family, type, proto)) != INVALID_SOCKET && +#if !MG_LWIP /* LWIP doesn't support either */ +#if defined(_WIN32) && defined(SO_EXCLUSIVEADDRUSE) && !defined(WINCE) + /* "Using SO_REUSEADDR and SO_EXCLUSIVEADDRUSE" http://goo.gl/RmrFTm */ + !setsockopt(sock, SOL_SOCKET, SO_EXCLUSIVEADDRUSE, (void *) &on, + sizeof(on)) && +#endif + +#if !defined(_WIN32) || !defined(SO_EXCLUSIVEADDRUSE) + /* + * SO_RESUSEADDR is not enabled on Windows because the semantics of + * SO_REUSEADDR on UNIX and Windows is different. On Windows, + * SO_REUSEADDR allows to bind a socket to a port without error even if + * the port is already open by another program. This is not the behavior + * SO_REUSEADDR was designed for, and leads to hard-to-track failure + * scenarios. Therefore, SO_REUSEADDR was disabled on Windows unless + * SO_EXCLUSIVEADDRUSE is supported and set on a socket. + */ + !setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void *) &on, sizeof(on)) && +#endif +#endif /* !MG_LWIP */ + + !bind(sock, &sa->sa, sa_len) && + (type == SOCK_DGRAM || listen(sock, SOMAXCONN) == 0)) { +#if !MG_LWIP + mg_set_non_blocking_mode(sock); + /* In case port was set to 0, get the real port number */ + (void) getsockname(sock, &sa->sa, &sa_len); +#endif + } else if (sock != INVALID_SOCKET) { + closesocket(sock); + sock = INVALID_SOCKET; + } + + return sock; +} + +static void mg_write_to_socket(struct mg_connection *nc) { + struct mbuf *io = &nc->send_mbuf; + int n = 0; + +#if MG_LWIP + /* With LWIP we don't know if the socket is ready */ + if (io->len == 0) return; +#endif + + assert(io->len > 0); + + if (nc->flags & MG_F_UDP) { + int n = + sendto(nc->sock, io->buf, io->len, 0, &nc->sa.sa, sizeof(nc->sa.sin)); + DBG(("%p %d %d %d %s:%hu", nc, nc->sock, n, mg_get_errno(), + inet_ntoa(nc->sa.sin.sin_addr), ntohs(nc->sa.sin.sin_port))); + mg_if_sent_cb(nc, n); + return; + } + +#if MG_ENABLE_SSL + if (nc->flags & MG_F_SSL) { + if (nc->flags & MG_F_SSL_HANDSHAKE_DONE) { + n = mg_ssl_if_write(nc, io->buf, io->len); + DBG(("%p %d bytes -> %d (SSL)", nc, n, nc->sock)); + if (n < 0) { + if (n != MG_SSL_WANT_READ && n != MG_SSL_WANT_WRITE) { + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + } + return; + } else { + /* Successful SSL operation, clear off SSL wait flags */ + nc->flags &= ~(MG_F_WANT_READ | MG_F_WANT_WRITE); + } + } else { + mg_ssl_begin(nc); + return; + } + } else +#endif + { + n = (int) MG_SEND_FUNC(nc->sock, io->buf, io->len, 0); + DBG(("%p %d bytes -> %d", nc, n, nc->sock)); + } + + mg_if_sent_cb(nc, n); +} + +MG_INTERNAL size_t recv_avail_size(struct mg_connection *conn, size_t max) { + size_t avail; + if (conn->recv_mbuf_limit < conn->recv_mbuf.len) return 0; + avail = conn->recv_mbuf_limit - conn->recv_mbuf.len; + return avail > max ? max : avail; +} + +static void mg_handle_tcp_read(struct mg_connection *conn) { + int n = 0; + char *buf = (char *) MG_MALLOC(MG_TCP_RECV_BUFFER_SIZE); + + if (buf == NULL) { + DBG(("OOM")); + return; + } + +#if MG_ENABLE_SSL + if (conn->flags & MG_F_SSL) { + if (conn->flags & MG_F_SSL_HANDSHAKE_DONE) { + /* SSL library may have more bytes ready to read than we ask to read. + * Therefore, read in a loop until we read everything. Without the loop, + * we skip to the next select() cycle which can just timeout. */ + while ((n = mg_ssl_if_read(conn, buf, MG_TCP_RECV_BUFFER_SIZE)) > 0) { + DBG(("%p %d bytes <- %d (SSL)", conn, n, conn->sock)); + mg_if_recv_tcp_cb(conn, buf, n, 1 /* own */); + buf = NULL; + if (conn->flags & MG_F_CLOSE_IMMEDIATELY) break; + /* buf has been freed, we need a new one. */ + buf = (char *) MG_MALLOC(MG_TCP_RECV_BUFFER_SIZE); + if (buf == NULL) break; + } + MG_FREE(buf); + if (n < 0 && n != MG_SSL_WANT_READ) conn->flags |= MG_F_CLOSE_IMMEDIATELY; + } else { + MG_FREE(buf); + mg_ssl_begin(conn); + return; + } + } else +#endif + { + n = (int) MG_RECV_FUNC(conn->sock, buf, + recv_avail_size(conn, MG_TCP_RECV_BUFFER_SIZE), 0); + DBG(("%p %d bytes (PLAIN) <- %d", conn, n, conn->sock)); + if (n > 0) { + mg_if_recv_tcp_cb(conn, buf, n, 1 /* own */); + } else { + MG_FREE(buf); + } + if (n == 0) { + /* Orderly shutdown of the socket, try flushing output. */ + conn->flags |= MG_F_SEND_AND_CLOSE; + } else if (n < 0 && mg_is_error()) { + conn->flags |= MG_F_CLOSE_IMMEDIATELY; + } + } +} + +static int mg_recvfrom(struct mg_connection *nc, union socket_address *sa, + socklen_t *sa_len, char **buf) { + int n; + *buf = (char *) MG_MALLOC(MG_UDP_RECV_BUFFER_SIZE); + if (*buf == NULL) { + DBG(("Out of memory")); + return -ENOMEM; + } + n = recvfrom(nc->sock, *buf, MG_UDP_RECV_BUFFER_SIZE, 0, &sa->sa, sa_len); + if (n <= 0) { + DBG(("%p recvfrom: %s", nc, strerror(mg_get_errno()))); + MG_FREE(*buf); + } + return n; +} + +static void mg_handle_udp_read(struct mg_connection *nc) { + char *buf = NULL; + union socket_address sa; + socklen_t sa_len = sizeof(sa); + int n = mg_recvfrom(nc, &sa, &sa_len, &buf); + DBG(("%p %d bytes from %s:%d", nc, n, inet_ntoa(nc->sa.sin.sin_addr), + ntohs(nc->sa.sin.sin_port))); + mg_if_recv_udp_cb(nc, buf, n, &sa, sa_len); +} + +#if MG_ENABLE_SSL +static void mg_ssl_begin(struct mg_connection *nc) { + int server_side = (nc->listener != NULL); + enum mg_ssl_if_result res = mg_ssl_if_handshake(nc); + DBG(("%p %d res %d", nc, server_side, res)); + + if (res == MG_SSL_OK) { + nc->flags |= MG_F_SSL_HANDSHAKE_DONE; + nc->flags &= ~(MG_F_WANT_READ | MG_F_WANT_WRITE); + + if (server_side) { + union socket_address sa; + socklen_t sa_len = sizeof(sa); + (void) getpeername(nc->sock, &sa.sa, &sa_len); + mg_if_accept_tcp_cb(nc, &sa, sa_len); + } else { + mg_if_connect_cb(nc, 0); + } + } else if (res != MG_SSL_WANT_READ && res != MG_SSL_WANT_WRITE) { + if (!server_side) { + mg_if_connect_cb(nc, res); + } + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + } +} +#endif /* MG_ENABLE_SSL */ + +#define _MG_F_FD_CAN_READ 1 +#define _MG_F_FD_CAN_WRITE 1 << 1 +#define _MG_F_FD_ERROR 1 << 2 + +void mg_mgr_handle_conn(struct mg_connection *nc, int fd_flags, double now) { + int worth_logging = + fd_flags != 0 || (nc->flags & (MG_F_WANT_READ | MG_F_WANT_WRITE)); + if (worth_logging) { + DBG(("%p fd=%d fd_flags=%d nc_flags=%lu rmbl=%d smbl=%d", nc, nc->sock, + fd_flags, nc->flags, (int) nc->recv_mbuf.len, + (int) nc->send_mbuf.len)); + } + + if (nc->flags & MG_F_CONNECTING) { + if (fd_flags != 0) { + int err = 0; +#if !defined(MG_ESP8266) + if (!(nc->flags & MG_F_UDP)) { + socklen_t len = sizeof(err); + int ret = + getsockopt(nc->sock, SOL_SOCKET, SO_ERROR, (char *) &err, &len); + if (ret != 0) { + err = 1; + } else if (err == EAGAIN || err == EWOULDBLOCK) { + err = 0; + } + } +#else + /* + * On ESP8266 we use blocking connect. + */ + err = nc->err; +#endif +#if MG_ENABLE_SSL + if ((nc->flags & MG_F_SSL) && err == 0) { + mg_ssl_begin(nc); + } else { + mg_if_connect_cb(nc, err); + } +#else + mg_if_connect_cb(nc, err); +#endif + } else if (nc->err != 0) { + mg_if_connect_cb(nc, nc->err); + } + } + + if (fd_flags & _MG_F_FD_CAN_READ) { + if (nc->flags & MG_F_UDP) { + mg_handle_udp_read(nc); + } else { + if (nc->flags & MG_F_LISTENING) { + /* + * We're not looping here, and accepting just one connection at + * a time. The reason is that eCos does not respect non-blocking + * flag on a listening socket and hangs in a loop. + */ + mg_accept_conn(nc); + } else { + mg_handle_tcp_read(nc); + } + } + } + + if (!(nc->flags & MG_F_CLOSE_IMMEDIATELY)) { + if ((fd_flags & _MG_F_FD_CAN_WRITE) && nc->send_mbuf.len > 0) { + mg_write_to_socket(nc); + } + mg_if_poll(nc, (time_t) now); + mg_if_timer(nc, now); + } + + if (worth_logging) { + DBG(("%p after fd=%d nc_flags=%lu rmbl=%d smbl=%d", nc, nc->sock, nc->flags, + (int) nc->recv_mbuf.len, (int) nc->send_mbuf.len)); + } +} + +#if MG_ENABLE_BROADCAST +static void mg_mgr_handle_ctl_sock(struct mg_mgr *mgr) { + struct ctl_msg ctl_msg; + int len = + (int) MG_RECV_FUNC(mgr->ctl[1], (char *) &ctl_msg, sizeof(ctl_msg), 0); + size_t dummy = MG_SEND_FUNC(mgr->ctl[1], ctl_msg.message, 1, 0); + DBG(("read %d from ctl socket", len)); + (void) dummy; /* https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25509 */ + if (len >= (int) sizeof(ctl_msg.callback) && ctl_msg.callback != NULL) { + struct mg_connection *nc; + for (nc = mg_next(mgr, NULL); nc != NULL; nc = mg_next(mgr, nc)) { + ctl_msg.callback(nc, MG_EV_POLL, + ctl_msg.message MG_UD_ARG(nc->user_data)); + } + } +} +#endif + +/* Associate a socket to a connection. */ +void mg_socket_if_sock_set(struct mg_connection *nc, sock_t sock) { + mg_set_non_blocking_mode(sock); + mg_set_close_on_exec(sock); + nc->sock = sock; + DBG(("%p %d", nc, sock)); +} + +void mg_socket_if_init(struct mg_iface *iface) { + (void) iface; + DBG(("%p using select()", iface->mgr)); +#if MG_ENABLE_BROADCAST + mg_socketpair(iface->mgr->ctl, SOCK_DGRAM); +#endif +} + +void mg_socket_if_free(struct mg_iface *iface) { + (void) iface; +} + +void mg_socket_if_add_conn(struct mg_connection *nc) { + (void) nc; +} + +void mg_socket_if_remove_conn(struct mg_connection *nc) { + (void) nc; +} + +void mg_add_to_set(sock_t sock, fd_set *set, sock_t *max_fd) { + if (sock != INVALID_SOCKET +#ifdef __unix__ + && sock < (sock_t) FD_SETSIZE +#endif + ) { + FD_SET(sock, set); + if (*max_fd == INVALID_SOCKET || sock > *max_fd) { + *max_fd = sock; + } + } +} + +time_t mg_socket_if_poll(struct mg_iface *iface, int timeout_ms) { + struct mg_mgr *mgr = iface->mgr; + double now = mg_time(); + double min_timer; + struct mg_connection *nc, *tmp; + struct timeval tv; + fd_set read_set, write_set, err_set; + sock_t max_fd = INVALID_SOCKET; + int num_fds, num_ev, num_timers = 0; +#ifdef __unix__ + int try_dup = 1; +#endif + + FD_ZERO(&read_set); + FD_ZERO(&write_set); + FD_ZERO(&err_set); +#if MG_ENABLE_BROADCAST + mg_add_to_set(mgr->ctl[1], &read_set, &max_fd); +#endif + + /* + * Note: it is ok to have connections with sock == INVALID_SOCKET in the list, + * e.g. timer-only "connections". + */ + min_timer = 0; + for (nc = mgr->active_connections, num_fds = 0; nc != NULL; nc = tmp) { + tmp = nc->next; + + if (nc->sock != INVALID_SOCKET) { + num_fds++; + +#ifdef __unix__ + /* A hack to make sure all our file descriptos fit into FD_SETSIZE. */ + if (nc->sock >= (sock_t) FD_SETSIZE && try_dup) { + int new_sock = dup(nc->sock); + if (new_sock >= 0 && new_sock < (sock_t) FD_SETSIZE) { + closesocket(nc->sock); + DBG(("new sock %d -> %d", nc->sock, new_sock)); + nc->sock = new_sock; + } else { + try_dup = 0; + } + } +#endif + + if (!(nc->flags & MG_F_WANT_WRITE) && + nc->recv_mbuf.len < nc->recv_mbuf_limit && + (!(nc->flags & MG_F_UDP) || nc->listener == NULL)) { + mg_add_to_set(nc->sock, &read_set, &max_fd); + } + + if (((nc->flags & MG_F_CONNECTING) && !(nc->flags & MG_F_WANT_READ)) || + (nc->send_mbuf.len > 0 && !(nc->flags & MG_F_CONNECTING))) { + mg_add_to_set(nc->sock, &write_set, &max_fd); + mg_add_to_set(nc->sock, &err_set, &max_fd); + } + } + + if (nc->ev_timer_time > 0) { + if (num_timers == 0 || nc->ev_timer_time < min_timer) { + min_timer = nc->ev_timer_time; + } + num_timers++; + } + } + + /* + * If there is a timer to be fired earlier than the requested timeout, + * adjust the timeout. + */ + if (num_timers > 0) { + double timer_timeout_ms = (min_timer - mg_time()) * 1000 + 1 /* rounding */; + if (timer_timeout_ms < timeout_ms) { + timeout_ms = (int) timer_timeout_ms; + } + } + if (timeout_ms < 0) timeout_ms = 0; + + tv.tv_sec = timeout_ms / 1000; + tv.tv_usec = (timeout_ms % 1000) * 1000; + + num_ev = select((int) max_fd + 1, &read_set, &write_set, &err_set, &tv); + now = mg_time(); +#if 0 + DBG(("select @ %ld num_ev=%d of %d, timeout=%d", (long) now, num_ev, num_fds, + timeout_ms)); +#endif + +#if MG_ENABLE_BROADCAST + if (num_ev > 0 && mgr->ctl[1] != INVALID_SOCKET && + FD_ISSET(mgr->ctl[1], &read_set)) { + mg_mgr_handle_ctl_sock(mgr); + } +#endif + + for (nc = mgr->active_connections; nc != NULL; nc = tmp) { + int fd_flags = 0; + if (nc->sock != INVALID_SOCKET) { + if (num_ev > 0) { + fd_flags = (FD_ISSET(nc->sock, &read_set) && + (!(nc->flags & MG_F_UDP) || nc->listener == NULL) + ? _MG_F_FD_CAN_READ + : 0) | + (FD_ISSET(nc->sock, &write_set) ? _MG_F_FD_CAN_WRITE : 0) | + (FD_ISSET(nc->sock, &err_set) ? _MG_F_FD_ERROR : 0); + } +#if MG_LWIP + /* With LWIP socket emulation layer, we don't get write events for UDP */ + if ((nc->flags & MG_F_UDP) && nc->listener == NULL) { + fd_flags |= _MG_F_FD_CAN_WRITE; + } +#endif + } + tmp = nc->next; + mg_mgr_handle_conn(nc, fd_flags, now); + } + + for (nc = mgr->active_connections; nc != NULL; nc = tmp) { + tmp = nc->next; + if ((nc->flags & MG_F_CLOSE_IMMEDIATELY) || + (nc->send_mbuf.len == 0 && (nc->flags & MG_F_SEND_AND_CLOSE))) { + mg_close_conn(nc); + } + } + + return (time_t) now; +} + +#if MG_ENABLE_BROADCAST +MG_INTERNAL void mg_socketpair_close(sock_t *sock) { + while (1) { + if (closesocket(*sock) == -1 && errno == EINTR) continue; + break; + } + *sock = INVALID_SOCKET; +} + +MG_INTERNAL sock_t +mg_socketpair_accept(sock_t sock, union socket_address *sa, socklen_t sa_len) { + sock_t rc; + while (1) { + if ((rc = accept(sock, &sa->sa, &sa_len)) == INVALID_SOCKET && + errno == EINTR) + continue; + break; + } + return rc; +} + +int mg_socketpair(sock_t sp[2], int sock_type) { + union socket_address sa; + sock_t sock; + socklen_t len = sizeof(sa.sin); + int ret = 0; + + sock = sp[0] = sp[1] = INVALID_SOCKET; + + (void) memset(&sa, 0, sizeof(sa)); + sa.sin.sin_family = AF_INET; + sa.sin.sin_port = htons(0); + sa.sin.sin_addr.s_addr = htonl(0x7f000001); /* 127.0.0.1 */ + + if ((sock = socket(AF_INET, sock_type, 0)) == INVALID_SOCKET) { + } else if (bind(sock, &sa.sa, len) != 0) { + } else if (sock_type == SOCK_STREAM && listen(sock, 1) != 0) { + } else if (getsockname(sock, &sa.sa, &len) != 0) { + } else if ((sp[0] = socket(AF_INET, sock_type, 0)) == INVALID_SOCKET) { + } else if (connect(sp[0], &sa.sa, len) != 0) { + } else if (sock_type == SOCK_DGRAM && + (getsockname(sp[0], &sa.sa, &len) != 0 || + connect(sock, &sa.sa, len) != 0)) { + } else if ((sp[1] = (sock_type == SOCK_DGRAM ? sock : mg_socketpair_accept( + sock, &sa, len))) == + INVALID_SOCKET) { + } else { + mg_set_close_on_exec(sp[0]); + mg_set_close_on_exec(sp[1]); + if (sock_type == SOCK_STREAM) mg_socketpair_close(&sock); + ret = 1; + } + + if (!ret) { + if (sp[0] != INVALID_SOCKET) mg_socketpair_close(&sp[0]); + if (sp[1] != INVALID_SOCKET) mg_socketpair_close(&sp[1]); + if (sock != INVALID_SOCKET) mg_socketpair_close(&sock); + } + + return ret; +} +#endif /* MG_ENABLE_BROADCAST */ + +static void mg_sock_get_addr(sock_t sock, int remote, + union socket_address *sa) { + socklen_t slen = sizeof(*sa); + memset(sa, 0, slen); + if (remote) { + getpeername(sock, &sa->sa, &slen); + } else { + getsockname(sock, &sa->sa, &slen); + } +} + +void mg_sock_to_str(sock_t sock, char *buf, size_t len, int flags) { + union socket_address sa; + mg_sock_get_addr(sock, flags & MG_SOCK_STRINGIFY_REMOTE, &sa); + mg_sock_addr_to_str(&sa, buf, len, flags); +} + +void mg_socket_if_get_conn_addr(struct mg_connection *nc, int remote, + union socket_address *sa) { + if ((nc->flags & MG_F_UDP) && remote) { + memcpy(sa, &nc->sa, sizeof(*sa)); + return; + } + mg_sock_get_addr(nc->sock, remote, sa); +} + +/* clang-format off */ +#define MG_SOCKET_IFACE_VTABLE \ + { \ + mg_socket_if_init, \ + mg_socket_if_free, \ + mg_socket_if_add_conn, \ + mg_socket_if_remove_conn, \ + mg_socket_if_poll, \ + mg_socket_if_listen_tcp, \ + mg_socket_if_listen_udp, \ + mg_socket_if_connect_tcp, \ + mg_socket_if_connect_udp, \ + mg_socket_if_tcp_send, \ + mg_socket_if_udp_send, \ + mg_socket_if_recved, \ + mg_socket_if_create_conn, \ + mg_socket_if_destroy_conn, \ + mg_socket_if_sock_set, \ + mg_socket_if_get_conn_addr, \ + } +/* clang-format on */ + +const struct mg_iface_vtable mg_socket_iface_vtable = MG_SOCKET_IFACE_VTABLE; +#if MG_NET_IF == MG_NET_IF_SOCKET +const struct mg_iface_vtable mg_default_iface_vtable = MG_SOCKET_IFACE_VTABLE; +#endif + +#endif /* MG_ENABLE_NET_IF_SOCKET */ +#ifdef MG_MODULE_LINES +#line 1 "mongoose/src/net_if_socks.c" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +#if MG_ENABLE_SOCKS + +struct socksdata { + char *proxy_addr; /* HOST:PORT of the socks5 proxy server */ + struct mg_connection *s; /* Respective connection to the server */ + struct mg_connection *c; /* Connection to the client */ + struct mbuf tmp; /* Temporary buffer for sent data */ +}; + +static void socks_if_disband(struct socksdata *d) { + LOG(LL_DEBUG, ("disbanding proxy %p %p", d->c, d->s)); + if (d->c) d->c->flags |= MG_F_SEND_AND_CLOSE; + if (d->s) d->s->flags |= MG_F_SEND_AND_CLOSE; + d->c = d->s = NULL; +} + +static void socks_if_handler(struct mg_connection *c, int ev, void *ev_data) { + struct socksdata *d = (struct socksdata *) c->user_data; + if (ev == MG_EV_CONNECT) { + int res = *(int *) ev_data; + if (res == 0) { + /* Send handshake to the proxy server */ + unsigned char buf[] = {MG_SOCKS_VERSION, 1, MG_SOCKS_HANDSHAKE_NOAUTH}; + mg_send(d->s, buf, sizeof(buf)); + LOG(LL_DEBUG, ("Sent handshake to %s", d->proxy_addr)); + } else { + LOG(LL_ERROR, ("Cannot connect to %s: %d", d->proxy_addr, res)); + d->c->flags |= MG_F_CLOSE_IMMEDIATELY; + } + } else if (ev == MG_EV_CLOSE) { + socks_if_disband(d); + } else if (ev == MG_EV_RECV) { + /* Handle handshake reply */ + if (!(c->flags & MG_SOCKS_HANDSHAKE_DONE)) { + /* TODO(lsm): process IPv6 too */ + unsigned char buf[10] = {MG_SOCKS_VERSION, MG_SOCKS_CMD_CONNECT, 0, + MG_SOCKS_ADDR_IPV4}; + if (c->recv_mbuf.len < 2) return; + if ((unsigned char) c->recv_mbuf.buf[1] == MG_SOCKS_HANDSHAKE_FAILURE) { + LOG(LL_ERROR, ("Server kicked us out")); + socks_if_disband(d); + return; + } + mbuf_remove(&c->recv_mbuf, 2); + c->flags |= MG_SOCKS_HANDSHAKE_DONE; + + /* Send connect request */ + memcpy(buf + 4, &d->c->sa.sin.sin_addr, 4); + memcpy(buf + 8, &d->c->sa.sin.sin_port, 2); + mg_send(c, buf, sizeof(buf)); + } + /* Process connect request */ + if ((c->flags & MG_SOCKS_HANDSHAKE_DONE) && + !(c->flags & MG_SOCKS_CONNECT_DONE)) { + if (c->recv_mbuf.len < 10) return; + if (c->recv_mbuf.buf[1] != MG_SOCKS_SUCCESS) { + LOG(LL_ERROR, ("Socks connection error: %d", c->recv_mbuf.buf[1])); + socks_if_disband(d); + return; + } + mbuf_remove(&c->recv_mbuf, 10); + c->flags |= MG_SOCKS_CONNECT_DONE; + /* Connected. Move sent data from client, if any, to server */ + if (d->s && d->c) { + mbuf_append(&d->s->send_mbuf, d->tmp.buf, d->tmp.len); + mbuf_free(&d->tmp); + } + } + /* All flags are set, we're in relay mode */ + if ((c->flags & MG_SOCKS_CONNECT_DONE) && d->c && d->s) { + mbuf_append(&d->c->recv_mbuf, d->s->recv_mbuf.buf, d->s->recv_mbuf.len); + mbuf_remove(&d->s->recv_mbuf, d->s->recv_mbuf.len); + } + } +} + +static void mg_socks_if_connect_tcp(struct mg_connection *c, + const union socket_address *sa) { + struct socksdata *d = (struct socksdata *) c->iface->data; + d->c = c; + d->s = mg_connect(c->mgr, d->proxy_addr, socks_if_handler); + d->s->user_data = d; + LOG(LL_DEBUG, ("%p %s", c, d->proxy_addr)); + (void) sa; +} + +static void mg_socks_if_connect_udp(struct mg_connection *c) { + (void) c; +} + +static int mg_socks_if_listen_tcp(struct mg_connection *c, + union socket_address *sa) { + (void) c; + (void) sa; + return 0; +} + +static int mg_socks_if_listen_udp(struct mg_connection *c, + union socket_address *sa) { + (void) c; + (void) sa; + return -1; +} + +static void mg_socks_if_tcp_send(struct mg_connection *c, const void *buf, + size_t len) { + struct socksdata *d = (struct socksdata *) c->iface->data; + LOG(LL_DEBUG, ("%p -> %p %d %d", c, buf, (int) len, (int) c->send_mbuf.len)); + if (d && d->s && d->s->flags & MG_SOCKS_CONNECT_DONE) { + mbuf_append(&d->s->send_mbuf, d->tmp.buf, d->tmp.len); + mbuf_append(&d->s->send_mbuf, buf, len); + mbuf_free(&d->tmp); + } else { + mbuf_append(&d->tmp, buf, len); + } +} + +static void mg_socks_if_udp_send(struct mg_connection *c, const void *buf, + size_t len) { + (void) c; + (void) buf; + (void) len; +} + +static void mg_socks_if_recved(struct mg_connection *c, size_t len) { + (void) c; + (void) len; +} + +static int mg_socks_if_create_conn(struct mg_connection *c) { + (void) c; + return 1; +} + +static void mg_socks_if_destroy_conn(struct mg_connection *c) { + c->iface->vtable->free(c->iface); + MG_FREE(c->iface); + c->iface = NULL; + LOG(LL_DEBUG, ("%p", c)); +} + +static void mg_socks_if_sock_set(struct mg_connection *c, sock_t sock) { + (void) c; + (void) sock; +} + +static void mg_socks_if_init(struct mg_iface *iface) { + (void) iface; +} + +static void mg_socks_if_free(struct mg_iface *iface) { + struct socksdata *d = (struct socksdata *) iface->data; + LOG(LL_DEBUG, ("%p", iface)); + if (d != NULL) { + socks_if_disband(d); + mbuf_free(&d->tmp); + MG_FREE(d->proxy_addr); + MG_FREE(d); + iface->data = NULL; + } +} + +static void mg_socks_if_add_conn(struct mg_connection *c) { + c->sock = INVALID_SOCKET; +} + +static void mg_socks_if_remove_conn(struct mg_connection *c) { + (void) c; +} + +static time_t mg_socks_if_poll(struct mg_iface *iface, int timeout_ms) { + LOG(LL_DEBUG, ("%p", iface)); + (void) iface; + (void) timeout_ms; + return (time_t) cs_time(); +} + +static void mg_socks_if_get_conn_addr(struct mg_connection *c, int remote, + union socket_address *sa) { + LOG(LL_DEBUG, ("%p", c)); + (void) c; + (void) remote; + (void) sa; +} + +const struct mg_iface_vtable mg_socks_iface_vtable = { + mg_socks_if_init, mg_socks_if_free, + mg_socks_if_add_conn, mg_socks_if_remove_conn, + mg_socks_if_poll, mg_socks_if_listen_tcp, + mg_socks_if_listen_udp, mg_socks_if_connect_tcp, + mg_socks_if_connect_udp, mg_socks_if_tcp_send, + mg_socks_if_udp_send, mg_socks_if_recved, + mg_socks_if_create_conn, mg_socks_if_destroy_conn, + mg_socks_if_sock_set, mg_socks_if_get_conn_addr, +}; + +struct mg_iface *mg_socks_mk_iface(struct mg_mgr *mgr, const char *proxy_addr) { + struct mg_iface *iface = mg_if_create_iface(&mg_socks_iface_vtable, mgr); + iface->data = MG_CALLOC(1, sizeof(struct socksdata)); + ((struct socksdata *) iface->data)->proxy_addr = strdup(proxy_addr); + return iface; +} + +#endif +#ifdef MG_MODULE_LINES +#line 1 "mongoose/src/net_if_tun.c" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +#if MG_ENABLE_TUN + +/* Amalgamated: #include "common/cs_dbg.h" */ +/* Amalgamated: #include "common/cs_time.h" */ +/* Amalgamated: #include "mongoose/src/internal.h" */ +/* Amalgamated: #include "mongoose/src/net_if_tun.h" */ +/* Amalgamated: #include "mongoose/src/tun.h" */ +/* Amalgamated: #include "mongoose/src/util.h" */ + +#define MG_TCP_RECV_BUFFER_SIZE 1024 +#define MG_UDP_RECV_BUFFER_SIZE 1500 + +void mg_tun_if_connect_tcp(struct mg_connection *nc, + const union socket_address *sa) { + (void) nc; + (void) sa; +} + +void mg_tun_if_connect_udp(struct mg_connection *nc) { + (void) nc; +} + +int mg_tun_if_listen_tcp(struct mg_connection *nc, union socket_address *sa) { + (void) nc; + (void) sa; + return 0; +} + +int mg_tun_if_listen_udp(struct mg_connection *nc, union socket_address *sa) { + (void) nc; + (void) sa; + return -1; +} + +void mg_tun_if_tcp_send(struct mg_connection *nc, const void *buf, size_t len) { + struct mg_tun_client *client = (struct mg_tun_client *) nc->iface->data; + uint32_t stream_id = (uint32_t)(uintptr_t) nc->mgr_data; + struct mg_str msg = {(char *) buf, len}; +#if MG_ENABLE_HEXDUMP + char hex[512]; + mg_hexdump(buf, len, hex, sizeof(hex)); + LOG(LL_DEBUG, ("sending to stream 0x%x:\n%s", (unsigned int) stream_id, hex)); +#endif + + mg_tun_send_frame(client->disp, stream_id, MG_TUN_DATA_FRAME, 0, msg); +} + +void mg_tun_if_udp_send(struct mg_connection *nc, const void *buf, size_t len) { + (void) nc; + (void) buf; + (void) len; +} + +void mg_tun_if_recved(struct mg_connection *nc, size_t len) { + (void) nc; + (void) len; +} + +int mg_tun_if_create_conn(struct mg_connection *nc) { + (void) nc; + return 1; +} + +void mg_tun_if_destroy_conn(struct mg_connection *nc) { + struct mg_tun_client *client = (struct mg_tun_client *) nc->iface->data; + + if (nc->flags & MG_F_LISTENING) { + mg_tun_destroy_client(client); + } else if (client->disp) { + uint32_t stream_id = (uint32_t)(uintptr_t) nc->mgr_data; + struct mg_str msg = {NULL, 0}; + + LOG(LL_DEBUG, ("closing 0x%x:", (unsigned int) stream_id)); + mg_tun_send_frame(client->disp, stream_id, MG_TUN_DATA_FRAME, + MG_TUN_F_END_STREAM, msg); + } +} + +/* Associate a socket to a connection. */ +void mg_tun_if_sock_set(struct mg_connection *nc, sock_t sock) { + (void) nc; + (void) sock; +} + +void mg_tun_if_init(struct mg_iface *iface) { + (void) iface; +} + +void mg_tun_if_free(struct mg_iface *iface) { + (void) iface; +} + +void mg_tun_if_add_conn(struct mg_connection *nc) { + nc->sock = INVALID_SOCKET; +} + +void mg_tun_if_remove_conn(struct mg_connection *nc) { + (void) nc; +} + +time_t mg_tun_if_poll(struct mg_iface *iface, int timeout_ms) { + (void) iface; + (void) timeout_ms; + return (time_t) cs_time(); +} + +void mg_tun_if_get_conn_addr(struct mg_connection *nc, int remote, + union socket_address *sa) { + (void) nc; + (void) remote; + (void) sa; +} + +struct mg_connection *mg_tun_if_find_conn(struct mg_tun_client *client, + uint32_t stream_id) { + struct mg_connection *nc = NULL; + + for (nc = client->mgr->active_connections; nc != NULL; nc = nc->next) { + if (nc->iface != client->iface || (nc->flags & MG_F_LISTENING)) { + continue; + } + if (stream_id == (uint32_t)(uintptr_t) nc->mgr_data) { + return nc; + } + } + + if (stream_id > client->last_stream_id) { + /* create a new connection */ + LOG(LL_DEBUG, ("new stream 0x%x, accepting", (unsigned int) stream_id)); + nc = mg_if_accept_new_conn(client->listener); + nc->mgr_data = (void *) (uintptr_t) stream_id; + client->last_stream_id = stream_id; + } else { + LOG(LL_DEBUG, + ("Ignoring stream 0x%x (last_stream_id 0x%x)", (unsigned int) stream_id, + (unsigned int) client->last_stream_id)); + } + + return nc; +} + +/* clang-format off */ +#define MG_TUN_IFACE_VTABLE \ + { \ + mg_tun_if_init, \ + mg_tun_if_free, \ + mg_tun_if_add_conn, \ + mg_tun_if_remove_conn, \ + mg_tun_if_poll, \ + mg_tun_if_listen_tcp, \ + mg_tun_if_listen_udp, \ + mg_tun_if_connect_tcp, \ + mg_tun_if_connect_udp, \ + mg_tun_if_tcp_send, \ + mg_tun_if_udp_send, \ + mg_tun_if_recved, \ + mg_tun_if_create_conn, \ + mg_tun_if_destroy_conn, \ + mg_tun_if_sock_set, \ + mg_tun_if_get_conn_addr, \ + } +/* clang-format on */ + +const struct mg_iface_vtable mg_tun_iface_vtable = MG_TUN_IFACE_VTABLE; + +#endif /* MG_ENABLE_TUN */ +#ifdef MG_MODULE_LINES +#line 1 "mongoose/src/ssl_if_openssl.c" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +#if MG_ENABLE_SSL && MG_SSL_IF == MG_SSL_IF_OPENSSL + +#ifdef __APPLE__ +#pragma GCC diagnostic ignored "-Wdeprecated-declarations" +#endif + +#include <openssl/ssl.h> + +struct mg_ssl_if_ctx { + SSL *ssl; + SSL_CTX *ssl_ctx; + struct mbuf psk; + size_t identity_len; +}; + +void mg_ssl_if_init() { + SSL_library_init(); +} + +enum mg_ssl_if_result mg_ssl_if_conn_accept(struct mg_connection *nc, + struct mg_connection *lc) { + struct mg_ssl_if_ctx *ctx = + (struct mg_ssl_if_ctx *) MG_CALLOC(1, sizeof(*ctx)); + struct mg_ssl_if_ctx *lc_ctx = (struct mg_ssl_if_ctx *) lc->ssl_if_data; + nc->ssl_if_data = ctx; + if (ctx == NULL || lc_ctx == NULL) return MG_SSL_ERROR; + ctx->ssl_ctx = lc_ctx->ssl_ctx; + if ((ctx->ssl = SSL_new(ctx->ssl_ctx)) == NULL) { + return MG_SSL_ERROR; + } + return MG_SSL_OK; +} + +static enum mg_ssl_if_result mg_use_cert(SSL_CTX *ctx, const char *cert, + const char *key, const char **err_msg); +static enum mg_ssl_if_result mg_use_ca_cert(SSL_CTX *ctx, const char *cert); +static enum mg_ssl_if_result mg_set_cipher_list(SSL_CTX *ctx, const char *cl); +static enum mg_ssl_if_result mg_ssl_if_ossl_set_psk(struct mg_ssl_if_ctx *ctx, + const char *identity, + const char *key_str); + +enum mg_ssl_if_result mg_ssl_if_conn_init( + struct mg_connection *nc, const struct mg_ssl_if_conn_params *params, + const char **err_msg) { + struct mg_ssl_if_ctx *ctx = + (struct mg_ssl_if_ctx *) MG_CALLOC(1, sizeof(*ctx)); + DBG(("%p %s,%s,%s", nc, (params->cert ? params->cert : ""), + (params->key ? params->key : ""), + (params->ca_cert ? params->ca_cert : ""))); + if (ctx == NULL) { + MG_SET_PTRPTR(err_msg, "Out of memory"); + return MG_SSL_ERROR; + } + nc->ssl_if_data = ctx; + if (nc->flags & MG_F_LISTENING) { + ctx->ssl_ctx = SSL_CTX_new(SSLv23_server_method()); + } else { + ctx->ssl_ctx = SSL_CTX_new(SSLv23_client_method()); + } + if (ctx->ssl_ctx == NULL) { + MG_SET_PTRPTR(err_msg, "Failed to create SSL context"); + return MG_SSL_ERROR; + } + +#ifndef KR_VERSION + /* Disable deprecated protocols. */ + SSL_CTX_set_options(ctx->ssl_ctx, SSL_OP_NO_SSLv2); + SSL_CTX_set_options(ctx->ssl_ctx, SSL_OP_NO_SSLv3); + SSL_CTX_set_options(ctx->ssl_ctx, SSL_OP_NO_TLSv1); +#ifdef MG_SSL_OPENSSL_NO_COMPRESSION + SSL_CTX_set_options(ctx->ssl_ctx, SSL_OP_NO_COMPRESSION); +#endif +#ifdef MG_SSL_OPENSSL_CIPHER_SERVER_PREFERENCE + SSL_CTX_set_options(ctx->ssl_ctx, SSL_OP_CIPHER_SERVER_PREFERENCE); +#endif +#else +/* Krypton only supports TLSv1.2 anyway. */ +#endif + + if (params->cert != NULL && + mg_use_cert(ctx->ssl_ctx, params->cert, params->key, err_msg) != + MG_SSL_OK) { + return MG_SSL_ERROR; + } + + if (params->ca_cert != NULL && + mg_use_ca_cert(ctx->ssl_ctx, params->ca_cert) != MG_SSL_OK) { + MG_SET_PTRPTR(err_msg, "Invalid SSL CA cert"); + return MG_SSL_ERROR; + } + + if (params->server_name != NULL) { +#ifdef KR_VERSION + SSL_CTX_kr_set_verify_name(ctx->ssl_ctx, params->server_name); +#else +/* TODO(rojer): Implement server name verification on OpenSSL. */ +#endif + } + + if (mg_set_cipher_list(ctx->ssl_ctx, params->cipher_suites) != MG_SSL_OK) { + MG_SET_PTRPTR(err_msg, "Invalid cipher suite list"); + return MG_SSL_ERROR; + } + + mbuf_init(&ctx->psk, 0); + if (mg_ssl_if_ossl_set_psk(ctx, params->psk_identity, params->psk_key) != + MG_SSL_OK) { + MG_SET_PTRPTR(err_msg, "Invalid PSK settings"); + return MG_SSL_ERROR; + } + + if (!(nc->flags & MG_F_LISTENING) && + (ctx->ssl = SSL_new(ctx->ssl_ctx)) == NULL) { + MG_SET_PTRPTR(err_msg, "Failed to create SSL session"); + return MG_SSL_ERROR; + } + + nc->flags |= MG_F_SSL; + + return MG_SSL_OK; +} + +static enum mg_ssl_if_result mg_ssl_if_ssl_err(struct mg_connection *nc, + int res) { + struct mg_ssl_if_ctx *ctx = (struct mg_ssl_if_ctx *) nc->ssl_if_data; + int err = SSL_get_error(ctx->ssl, res); + if (err == SSL_ERROR_WANT_READ) return MG_SSL_WANT_READ; + if (err == SSL_ERROR_WANT_WRITE) return MG_SSL_WANT_WRITE; + DBG(("%p %p SSL error: %d %d", nc, ctx->ssl_ctx, res, err)); + nc->err = err; + return MG_SSL_ERROR; +} + +enum mg_ssl_if_result mg_ssl_if_handshake(struct mg_connection *nc) { + struct mg_ssl_if_ctx *ctx = (struct mg_ssl_if_ctx *) nc->ssl_if_data; + int server_side = (nc->listener != NULL); + int res; + /* If descriptor is not yet set, do it now. */ + if (SSL_get_fd(ctx->ssl) < 0) { + if (SSL_set_fd(ctx->ssl, nc->sock) != 1) return MG_SSL_ERROR; + } + res = server_side ? SSL_accept(ctx->ssl) : SSL_connect(ctx->ssl); + if (res != 1) return mg_ssl_if_ssl_err(nc, res); + return MG_SSL_OK; +} + +int mg_ssl_if_read(struct mg_connection *nc, void *buf, size_t buf_size) { + struct mg_ssl_if_ctx *ctx = (struct mg_ssl_if_ctx *) nc->ssl_if_data; + int n = SSL_read(ctx->ssl, buf, buf_size); + DBG(("%p %d -> %d", nc, (int) buf_size, n)); + if (n < 0) return mg_ssl_if_ssl_err(nc, n); + if (n == 0) nc->flags |= MG_F_CLOSE_IMMEDIATELY; + return n; +} + +int mg_ssl_if_write(struct mg_connection *nc, const void *data, size_t len) { + struct mg_ssl_if_ctx *ctx = (struct mg_ssl_if_ctx *) nc->ssl_if_data; + int n = SSL_write(ctx->ssl, data, len); + DBG(("%p %d -> %d", nc, (int) len, n)); + if (n <= 0) return mg_ssl_if_ssl_err(nc, n); + return n; +} + +void mg_ssl_if_conn_close_notify(struct mg_connection *nc) { + struct mg_ssl_if_ctx *ctx = (struct mg_ssl_if_ctx *) nc->ssl_if_data; + if (ctx == NULL) return; + SSL_shutdown(ctx->ssl); +} + +void mg_ssl_if_conn_free(struct mg_connection *nc) { + struct mg_ssl_if_ctx *ctx = (struct mg_ssl_if_ctx *) nc->ssl_if_data; + if (ctx == NULL) return; + nc->ssl_if_data = NULL; + if (ctx->ssl != NULL) SSL_free(ctx->ssl); + if (ctx->ssl_ctx != NULL && nc->listener == NULL) SSL_CTX_free(ctx->ssl_ctx); + mbuf_free(&ctx->psk); + memset(ctx, 0, sizeof(*ctx)); + MG_FREE(ctx); +} + +/* + * Cipher suite options used for TLS negotiation. + * https://wiki.mozilla.org/Security/Server_Side_TLS#Recommended_configurations + */ +static const char mg_s_cipher_list[] = +#if defined(MG_SSL_CRYPTO_MODERN) + "ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:" + "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:" + "DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:" + "ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:" + "ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:" + "ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:" + "DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:" + "DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:" + "!aNULL:!eNULL:!EXPORT:!DES:!RC4:!3DES:!MD5:!PSK" +#elif defined(MG_SSL_CRYPTO_OLD) + "ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:" + "ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:" + "DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:" + "ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:" + "ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:" + "ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:" + "DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:" + "DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:ECDHE-RSA-DES-CBC3-SHA:" + "ECDHE-ECDSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:" + "AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:DES-CBC3-SHA:" + "HIGH:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:" + "!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA" +#else /* Default - intermediate. */ + "ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:" + "ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:" + "DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:" + "ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:" + "ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:" + "ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:" + "DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:" + "DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:" + "AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:" + "DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:" + "!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA" +#endif + ; + +/* + * Default DH params for PFS cipher negotiation. This is a 2048-bit group. + * Will be used if none are provided by the user in the certificate file. + */ +#if !MG_DISABLE_PFS && !defined(KR_VERSION) +static const char mg_s_default_dh_params[] = + "\ +-----BEGIN DH PARAMETERS-----\n\ +MIIBCAKCAQEAlvbgD/qh9znWIlGFcV0zdltD7rq8FeShIqIhkQ0C7hYFThrBvF2E\n\ +Z9bmgaP+sfQwGpVlv9mtaWjvERbu6mEG7JTkgmVUJrUt/wiRzwTaCXBqZkdUO8Tq\n\ ++E6VOEQAilstG90ikN1Tfo+K6+X68XkRUIlgawBTKuvKVwBhuvlqTGerOtnXWnrt\n\ +ym//hd3cd5PBYGBix0i7oR4xdghvfR2WLVu0LgdThTBb6XP7gLd19cQ1JuBtAajZ\n\ +wMuPn7qlUkEFDIkAZy59/Hue/H2Q2vU/JsvVhHWCQBL4F1ofEAt50il6ZxR1QfFK\n\ +9VGKDC4oOgm9DlxwwBoC2FjqmvQlqVV3kwIBAg==\n\ +-----END DH PARAMETERS-----\n"; +#endif + +static enum mg_ssl_if_result mg_use_ca_cert(SSL_CTX *ctx, const char *cert) { + if (cert == NULL || strcmp(cert, "*") == 0) { + return MG_SSL_OK; + } + SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT, 0); + return SSL_CTX_load_verify_locations(ctx, cert, NULL) == 1 ? MG_SSL_OK + : MG_SSL_ERROR; +} + +static enum mg_ssl_if_result mg_use_cert(SSL_CTX *ctx, const char *cert, + const char *key, + const char **err_msg) { + if (key == NULL) key = cert; + if (cert == NULL || cert[0] == '\0' || key == NULL || key[0] == '\0') { + return MG_SSL_OK; + } else if (SSL_CTX_use_certificate_file(ctx, cert, 1) == 0) { + MG_SET_PTRPTR(err_msg, "Invalid SSL cert"); + return MG_SSL_ERROR; + } else if (SSL_CTX_use_PrivateKey_file(ctx, key, 1) == 0) { + MG_SET_PTRPTR(err_msg, "Invalid SSL key"); + return MG_SSL_ERROR; + } else if (SSL_CTX_use_certificate_chain_file(ctx, cert) == 0) { + MG_SET_PTRPTR(err_msg, "Invalid CA bundle"); + return MG_SSL_ERROR; + } else { + SSL_CTX_set_mode(ctx, SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER); +#if !MG_DISABLE_PFS && !defined(KR_VERSION) + BIO *bio = NULL; + DH *dh = NULL; + + /* Try to read DH parameters from the cert/key file. */ + bio = BIO_new_file(cert, "r"); + if (bio != NULL) { + dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL); + BIO_free(bio); + } + /* + * If there are no DH params in the file, fall back to hard-coded ones. + * Not ideal, but better than nothing. + */ + if (dh == NULL) { + bio = BIO_new_mem_buf((void *) mg_s_default_dh_params, -1); + dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL); + BIO_free(bio); + } + if (dh != NULL) { + SSL_CTX_set_tmp_dh(ctx, dh); + SSL_CTX_set_options(ctx, SSL_OP_SINGLE_DH_USE); + DH_free(dh); + } +#if OPENSSL_VERSION_NUMBER > 0x10002000L + SSL_CTX_set_ecdh_auto(ctx, 1); +#endif +#endif + } + return MG_SSL_OK; +} + +static enum mg_ssl_if_result mg_set_cipher_list(SSL_CTX *ctx, const char *cl) { + return (SSL_CTX_set_cipher_list(ctx, cl ? cl : mg_s_cipher_list) == 1 + ? MG_SSL_OK + : MG_SSL_ERROR); +} + +#ifndef KR_VERSION +static unsigned int mg_ssl_if_ossl_psk_cb(SSL *ssl, const char *hint, + char *identity, + unsigned int max_identity_len, + unsigned char *psk, + unsigned int max_psk_len) { + struct mg_ssl_if_ctx *ctx = + (struct mg_ssl_if_ctx *) SSL_CTX_get_app_data(SSL_get_SSL_CTX(ssl)); + size_t key_len = ctx->psk.len - ctx->identity_len - 1; + DBG(("hint: '%s'", (hint ? hint : ""))); + if (ctx->identity_len + 1 > max_identity_len) { + DBG(("identity too long")); + return 0; + } + if (key_len > max_psk_len) { + DBG(("key too long")); + return 0; + } + memcpy(identity, ctx->psk.buf, ctx->identity_len + 1); + memcpy(psk, ctx->psk.buf + ctx->identity_len + 1, key_len); + (void) ssl; + return key_len; +} + +static enum mg_ssl_if_result mg_ssl_if_ossl_set_psk(struct mg_ssl_if_ctx *ctx, + const char *identity, + const char *key_str) { + unsigned char key[32]; + size_t key_len; + size_t i = 0; + if (identity == NULL && key_str == NULL) return MG_SSL_OK; + if (identity == NULL || key_str == NULL) return MG_SSL_ERROR; + key_len = strlen(key_str); + if (key_len != 32 && key_len != 64) return MG_SSL_ERROR; + memset(key, 0, sizeof(key)); + key_len = 0; + for (i = 0; key_str[i] != '\0'; i++) { + unsigned char c; + char hc = tolower((int) key_str[i]); + if (hc >= '0' && hc <= '9') { + c = hc - '0'; + } else if (hc >= 'a' && hc <= 'f') { + c = hc - 'a' + 0xa; + } else { + return MG_SSL_ERROR; + } + key_len = i / 2; + key[key_len] <<= 4; + key[key_len] |= c; + } + key_len++; + DBG(("identity = '%s', key = (%u)", identity, (unsigned int) key_len)); + ctx->identity_len = strlen(identity); + mbuf_append(&ctx->psk, identity, ctx->identity_len + 1); + mbuf_append(&ctx->psk, key, key_len); + SSL_CTX_set_psk_client_callback(ctx->ssl_ctx, mg_ssl_if_ossl_psk_cb); + SSL_CTX_set_app_data(ctx->ssl_ctx, ctx); + return MG_SSL_OK; +} +#else +static enum mg_ssl_if_result mg_ssl_if_ossl_set_psk(struct mg_ssl_if_ctx *ctx, + const char *identity, + const char *key_str) { + (void) ctx; + (void) identity; + (void) key_str; + /* Krypton does not support PSK. */ + return MG_SSL_ERROR; +} +#endif /* defined(KR_VERSION) */ + +const char *mg_set_ssl(struct mg_connection *nc, const char *cert, + const char *ca_cert) { + const char *err_msg = NULL; + struct mg_ssl_if_conn_params params; + memset(¶ms, 0, sizeof(params)); + params.cert = cert; + params.ca_cert = ca_cert; + if (mg_ssl_if_conn_init(nc, ¶ms, &err_msg) != MG_SSL_OK) { + return err_msg; + } + return NULL; +} + +#endif /* MG_ENABLE_SSL && MG_SSL_IF == MG_SSL_IF_OPENSSL */ +#ifdef MG_MODULE_LINES +#line 1 "mongoose/src/ssl_if_mbedtls.c" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +#if MG_ENABLE_SSL && MG_SSL_IF == MG_SSL_IF_MBEDTLS + +#include <mbedtls/debug.h> +#include <mbedtls/ecp.h> +#include <mbedtls/platform.h> +#include <mbedtls/ssl.h> +#include <mbedtls/x509_crt.h> + +static void mg_ssl_mbed_log(void *ctx, int level, const char *file, int line, + const char *str) { + enum cs_log_level cs_level; + switch (level) { + case 1: + cs_level = LL_ERROR; + break; + case 2: + case 3: + cs_level = LL_DEBUG; + break; + default: + cs_level = LL_VERBOSE_DEBUG; + } + /* mbedTLS passes strings with \n at the end, strip it. */ + LOG(cs_level, ("%p %.*s", ctx, (int) (strlen(str) - 1), str)); + (void) file; + (void) line; +} + +struct mg_ssl_if_ctx { + mbedtls_ssl_config *conf; + mbedtls_ssl_context *ssl; + mbedtls_x509_crt *cert; + mbedtls_pk_context *key; + mbedtls_x509_crt *ca_cert; + struct mbuf cipher_suites; +}; + +/* Must be provided by the platform. ctx is struct mg_connection. */ +extern int mg_ssl_if_mbed_random(void *ctx, unsigned char *buf, size_t len); + +void mg_ssl_if_init() { +} + +enum mg_ssl_if_result mg_ssl_if_conn_accept(struct mg_connection *nc, + struct mg_connection *lc) { + struct mg_ssl_if_ctx *ctx = + (struct mg_ssl_if_ctx *) MG_CALLOC(1, sizeof(*ctx)); + struct mg_ssl_if_ctx *lc_ctx = (struct mg_ssl_if_ctx *) lc->ssl_if_data; + nc->ssl_if_data = ctx; + if (ctx == NULL || lc_ctx == NULL) return MG_SSL_ERROR; + ctx->ssl = (mbedtls_ssl_context *) MG_CALLOC(1, sizeof(*ctx->ssl)); + if (mbedtls_ssl_setup(ctx->ssl, lc_ctx->conf) != 0) { + return MG_SSL_ERROR; + } + return MG_SSL_OK; +} + +static enum mg_ssl_if_result mg_use_cert(struct mg_ssl_if_ctx *ctx, + const char *cert, const char *key, + const char **err_msg); +static enum mg_ssl_if_result mg_use_ca_cert(struct mg_ssl_if_ctx *ctx, + const char *cert); +static enum mg_ssl_if_result mg_set_cipher_list(struct mg_ssl_if_ctx *ctx, + const char *ciphers); +static enum mg_ssl_if_result mg_ssl_if_mbed_set_psk(struct mg_ssl_if_ctx *ctx, + const char *identity, + const char *key); + +enum mg_ssl_if_result mg_ssl_if_conn_init( + struct mg_connection *nc, const struct mg_ssl_if_conn_params *params, + const char **err_msg) { + struct mg_ssl_if_ctx *ctx = + (struct mg_ssl_if_ctx *) MG_CALLOC(1, sizeof(*ctx)); + DBG(("%p %s,%s,%s", nc, (params->cert ? params->cert : ""), + (params->key ? params->key : ""), + (params->ca_cert ? params->ca_cert : ""))); + + if (ctx == NULL) { + MG_SET_PTRPTR(err_msg, "Out of memory"); + return MG_SSL_ERROR; + } + nc->ssl_if_data = ctx; + ctx->conf = (mbedtls_ssl_config *) MG_CALLOC(1, sizeof(*ctx->conf)); + mbuf_init(&ctx->cipher_suites, 0); + mbedtls_ssl_config_init(ctx->conf); + mbedtls_ssl_conf_dbg(ctx->conf, mg_ssl_mbed_log, nc); + if (mbedtls_ssl_config_defaults( + ctx->conf, (nc->flags & MG_F_LISTENING ? MBEDTLS_SSL_IS_SERVER + : MBEDTLS_SSL_IS_CLIENT), + MBEDTLS_SSL_TRANSPORT_STREAM, MBEDTLS_SSL_PRESET_DEFAULT) != 0) { + MG_SET_PTRPTR(err_msg, "Failed to init SSL config"); + return MG_SSL_ERROR; + } + + /* TLS 1.2 and up */ + mbedtls_ssl_conf_min_version(ctx->conf, MBEDTLS_SSL_MAJOR_VERSION_3, + MBEDTLS_SSL_MINOR_VERSION_3); + mbedtls_ssl_conf_rng(ctx->conf, mg_ssl_if_mbed_random, nc); + + if (params->cert != NULL && + mg_use_cert(ctx, params->cert, params->key, err_msg) != MG_SSL_OK) { + return MG_SSL_ERROR; + } + + if (params->ca_cert != NULL && + mg_use_ca_cert(ctx, params->ca_cert) != MG_SSL_OK) { + MG_SET_PTRPTR(err_msg, "Invalid SSL CA cert"); + return MG_SSL_ERROR; + } + + if (mg_set_cipher_list(ctx, params->cipher_suites) != MG_SSL_OK) { + MG_SET_PTRPTR(err_msg, "Invalid cipher suite list"); + return MG_SSL_ERROR; + } + + if (mg_ssl_if_mbed_set_psk(ctx, params->psk_identity, params->psk_key) != + MG_SSL_OK) { + MG_SET_PTRPTR(err_msg, "Invalid PSK settings"); + return MG_SSL_ERROR; + } + + if (!(nc->flags & MG_F_LISTENING)) { + ctx->ssl = (mbedtls_ssl_context *) MG_CALLOC(1, sizeof(*ctx->ssl)); + mbedtls_ssl_init(ctx->ssl); + if (mbedtls_ssl_setup(ctx->ssl, ctx->conf) != 0) { + MG_SET_PTRPTR(err_msg, "Failed to create SSL session"); + return MG_SSL_ERROR; + } + if (params->server_name != NULL && + mbedtls_ssl_set_hostname(ctx->ssl, params->server_name) != 0) { + return MG_SSL_ERROR; + } + } + +#ifdef MG_SSL_IF_MBEDTLS_MAX_FRAG_LEN + if (mbedtls_ssl_conf_max_frag_len(ctx->conf, +#if MG_SSL_IF_MBEDTLS_MAX_FRAG_LEN == 512 + MBEDTLS_SSL_MAX_FRAG_LEN_512 +#elif MG_SSL_IF_MBEDTLS_MAX_FRAG_LEN == 1024 + MBEDTLS_SSL_MAX_FRAG_LEN_1024 +#elif MG_SSL_IF_MBEDTLS_MAX_FRAG_LEN == 2048 + MBEDTLS_SSL_MAX_FRAG_LEN_2048 +#elif MG_SSL_IF_MBEDTLS_MAX_FRAG_LEN == 4096 + MBEDTLS_SSL_MAX_FRAG_LEN_4096 +#else +#error Invalid MG_SSL_IF_MBEDTLS_MAX_FRAG_LEN +#endif + ) != 0) { + return MG_SSL_ERROR; + } +#endif + + nc->flags |= MG_F_SSL; + + return MG_SSL_OK; +} + +#if MG_NET_IF == MG_NET_IF_LWIP_LOW_LEVEL +int ssl_socket_send(void *ctx, const unsigned char *buf, size_t len); +int ssl_socket_recv(void *ctx, unsigned char *buf, size_t len); +#else +static int ssl_socket_send(void *ctx, const unsigned char *buf, size_t len) { + struct mg_connection *nc = (struct mg_connection *) ctx; + int n = (int) MG_SEND_FUNC(nc->sock, buf, len, 0); + LOG(LL_DEBUG, ("%p %d -> %d", nc, (int) len, n)); + if (n >= 0) return n; + n = mg_get_errno(); + return ((n == EAGAIN || n == EINPROGRESS) ? MBEDTLS_ERR_SSL_WANT_WRITE : -1); +} + +static int ssl_socket_recv(void *ctx, unsigned char *buf, size_t len) { + struct mg_connection *nc = (struct mg_connection *) ctx; + int n = (int) MG_RECV_FUNC(nc->sock, buf, len, 0); + LOG(LL_DEBUG, ("%p %d <- %d", nc, (int) len, n)); + if (n >= 0) return n; + n = mg_get_errno(); + return ((n == EAGAIN || n == EINPROGRESS) ? MBEDTLS_ERR_SSL_WANT_READ : -1); +} +#endif + +static enum mg_ssl_if_result mg_ssl_if_mbed_err(struct mg_connection *nc, + int ret) { + if (ret == MBEDTLS_ERR_SSL_WANT_READ) return MG_SSL_WANT_READ; + if (ret == MBEDTLS_ERR_SSL_WANT_WRITE) return MG_SSL_WANT_WRITE; + if (ret != + MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY) { /* CLOSE_NOTIFY = Normal shutdown */ + LOG(LL_ERROR, ("%p SSL error: %d", nc, ret)); + } + nc->err = ret; + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + return MG_SSL_ERROR; +} + +static void mg_ssl_if_mbed_free_certs_and_keys(struct mg_ssl_if_ctx *ctx) { + if (ctx->cert != NULL) { + mbedtls_x509_crt_free(ctx->cert); + MG_FREE(ctx->cert); + ctx->cert = NULL; + mbedtls_pk_free(ctx->key); + MG_FREE(ctx->key); + ctx->key = NULL; + } + if (ctx->ca_cert != NULL) { + mbedtls_ssl_conf_ca_chain(ctx->conf, NULL, NULL); +#ifdef MBEDTLS_X509_CA_CHAIN_ON_DISK + if (ctx->ca_cert->ca_chain_file != NULL) { + MG_FREE((void *) ctx->ca_cert->ca_chain_file); + ctx->ca_cert->ca_chain_file = NULL; + } +#endif + mbedtls_x509_crt_free(ctx->ca_cert); + MG_FREE(ctx->ca_cert); + ctx->ca_cert = NULL; + } +} + +enum mg_ssl_if_result mg_ssl_if_handshake(struct mg_connection *nc) { + struct mg_ssl_if_ctx *ctx = (struct mg_ssl_if_ctx *) nc->ssl_if_data; + int err; + /* If bio is not yet set, do it now. */ + if (ctx->ssl->p_bio == NULL) { + mbedtls_ssl_set_bio(ctx->ssl, nc, ssl_socket_send, ssl_socket_recv, NULL); + } + err = mbedtls_ssl_handshake(ctx->ssl); + if (err != 0) return mg_ssl_if_mbed_err(nc, err); +#ifdef MG_SSL_IF_MBEDTLS_FREE_CERTS + /* + * Free the peer certificate, we don't need it after handshake. + * Note that this effectively disables renegotiation. + */ + mbedtls_x509_crt_free(ctx->ssl->session->peer_cert); + mbedtls_free(ctx->ssl->session->peer_cert); + ctx->ssl->session->peer_cert = NULL; + /* On a client connection we can also free our own and CA certs. */ + if (nc->listener == NULL) { + if (ctx->conf->key_cert != NULL) { + /* Note that this assumes one key_cert entry, which matches our init. */ + MG_FREE(ctx->conf->key_cert); + ctx->conf->key_cert = NULL; + } + mbedtls_ssl_conf_ca_chain(ctx->conf, NULL, NULL); + mg_ssl_if_mbed_free_certs_and_keys(ctx); + } +#endif + return MG_SSL_OK; +} + +int mg_ssl_if_read(struct mg_connection *nc, void *buf, size_t buf_size) { + struct mg_ssl_if_ctx *ctx = (struct mg_ssl_if_ctx *) nc->ssl_if_data; + int n = mbedtls_ssl_read(ctx->ssl, (unsigned char *) buf, buf_size); + DBG(("%p %d -> %d", nc, (int) buf_size, n)); + if (n < 0) return mg_ssl_if_mbed_err(nc, n); + if (n == 0) nc->flags |= MG_F_CLOSE_IMMEDIATELY; + return n; +} + +int mg_ssl_if_write(struct mg_connection *nc, const void *data, size_t len) { + struct mg_ssl_if_ctx *ctx = (struct mg_ssl_if_ctx *) nc->ssl_if_data; + int n = mbedtls_ssl_write(ctx->ssl, (const unsigned char *) data, len); + DBG(("%p %d -> %d", nc, (int) len, n)); + if (n < 0) return mg_ssl_if_mbed_err(nc, n); + return n; +} + +void mg_ssl_if_conn_close_notify(struct mg_connection *nc) { + struct mg_ssl_if_ctx *ctx = (struct mg_ssl_if_ctx *) nc->ssl_if_data; + if (ctx == NULL) return; + mbedtls_ssl_close_notify(ctx->ssl); +} + +void mg_ssl_if_conn_free(struct mg_connection *nc) { + struct mg_ssl_if_ctx *ctx = (struct mg_ssl_if_ctx *) nc->ssl_if_data; + if (ctx == NULL) return; + nc->ssl_if_data = NULL; + if (ctx->ssl != NULL) { + mbedtls_ssl_free(ctx->ssl); + MG_FREE(ctx->ssl); + } + mg_ssl_if_mbed_free_certs_and_keys(ctx); + if (ctx->conf != NULL) { + mbedtls_ssl_config_free(ctx->conf); + MG_FREE(ctx->conf); + } + mbuf_free(&ctx->cipher_suites); + memset(ctx, 0, sizeof(*ctx)); + MG_FREE(ctx); +} + +static enum mg_ssl_if_result mg_use_ca_cert(struct mg_ssl_if_ctx *ctx, + const char *ca_cert) { + if (ca_cert == NULL || strcmp(ca_cert, "*") == 0) { + mbedtls_ssl_conf_authmode(ctx->conf, MBEDTLS_SSL_VERIFY_NONE); + return MG_SSL_OK; + } + ctx->ca_cert = (mbedtls_x509_crt *) MG_CALLOC(1, sizeof(*ctx->ca_cert)); + mbedtls_x509_crt_init(ctx->ca_cert); +#ifdef MBEDTLS_X509_CA_CHAIN_ON_DISK + ca_cert = strdup(ca_cert); + if (mbedtls_x509_crt_set_ca_chain_file(ctx->ca_cert, ca_cert) != 0) { + return MG_SSL_ERROR; + } +#else + if (mbedtls_x509_crt_parse_file(ctx->ca_cert, ca_cert) != 0) { + return MG_SSL_ERROR; + } +#endif + mbedtls_ssl_conf_ca_chain(ctx->conf, ctx->ca_cert, NULL); + mbedtls_ssl_conf_authmode(ctx->conf, MBEDTLS_SSL_VERIFY_REQUIRED); + return MG_SSL_OK; +} + +static enum mg_ssl_if_result mg_use_cert(struct mg_ssl_if_ctx *ctx, + const char *cert, const char *key, + const char **err_msg) { + if (key == NULL) key = cert; + if (cert == NULL || cert[0] == '\0' || key == NULL || key[0] == '\0') { + return MG_SSL_OK; + } + ctx->cert = (mbedtls_x509_crt *) MG_CALLOC(1, sizeof(*ctx->cert)); + mbedtls_x509_crt_init(ctx->cert); + ctx->key = (mbedtls_pk_context *) MG_CALLOC(1, sizeof(*ctx->key)); + mbedtls_pk_init(ctx->key); + if (mbedtls_x509_crt_parse_file(ctx->cert, cert) != 0) { + MG_SET_PTRPTR(err_msg, "Invalid SSL cert"); + return MG_SSL_ERROR; + } + if (mbedtls_pk_parse_keyfile(ctx->key, key, NULL) != 0) { + MG_SET_PTRPTR(err_msg, "Invalid SSL key"); + return MG_SSL_ERROR; + } + if (mbedtls_ssl_conf_own_cert(ctx->conf, ctx->cert, ctx->key) != 0) { + MG_SET_PTRPTR(err_msg, "Invalid SSL key or cert"); + return MG_SSL_ERROR; + } + return MG_SSL_OK; +} + +static const int mg_s_cipher_list[] = { +#if CS_PLATFORM != CS_P_ESP8266 + MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, + MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, + MBEDTLS_TLS_DHE_RSA_WITH_AES_128_GCM_SHA256, + MBEDTLS_TLS_DHE_RSA_WITH_AES_128_CBC_SHA256, + MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256, + MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256, + MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, + MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256, + MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256, + MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, + MBEDTLS_TLS_RSA_WITH_AES_128_GCM_SHA256, + MBEDTLS_TLS_RSA_WITH_AES_128_CBC_SHA256, + MBEDTLS_TLS_RSA_WITH_AES_128_CBC_SHA, +#else + /* + * ECDHE is way too slow on ESP8266 w/o cryptochip, this sometimes results + * in WiFi STA deauths. Use weaker but faster cipher suites. Sad but true. + * Disable DHE completely because it's just hopelessly slow. + */ + MBEDTLS_TLS_RSA_WITH_AES_128_GCM_SHA256, + MBEDTLS_TLS_RSA_WITH_AES_128_CBC_SHA256, + MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, + MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, + MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256, + MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256, + MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, + MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256, + MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256, + MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, + MBEDTLS_TLS_RSA_WITH_AES_128_CBC_SHA, +#endif /* CS_PLATFORM != CS_P_ESP8266 */ + 0, +}; + +/* + * Ciphers can be specified as a colon-separated list of cipher suite names. + * These can be found in + * https://github.com/ARMmbed/mbedtls/blob/development/library/ssl_ciphersuites.c#L267 + * E.g.: TLS-ECDHE-ECDSA-WITH-AES-128-GCM-SHA256:TLS-DHE-RSA-WITH-AES-256-CCM + */ +static enum mg_ssl_if_result mg_set_cipher_list(struct mg_ssl_if_ctx *ctx, + const char *ciphers) { + if (ciphers != NULL) { + int l, id; + const char *s = ciphers, *e; + char tmp[50]; + while (s != NULL) { + e = strchr(s, ':'); + l = (e != NULL ? (e - s) : (int) strlen(s)); + strncpy(tmp, s, l); + tmp[l] = '\0'; + id = mbedtls_ssl_get_ciphersuite_id(tmp); + DBG(("%s -> %04x", tmp, id)); + if (id != 0) { + mbuf_append(&ctx->cipher_suites, &id, sizeof(id)); + } + s = (e != NULL ? e + 1 : NULL); + } + if (ctx->cipher_suites.len == 0) return MG_SSL_ERROR; + id = 0; + mbuf_append(&ctx->cipher_suites, &id, sizeof(id)); + mbuf_trim(&ctx->cipher_suites); + mbedtls_ssl_conf_ciphersuites(ctx->conf, + (const int *) ctx->cipher_suites.buf); + } else { + mbedtls_ssl_conf_ciphersuites(ctx->conf, mg_s_cipher_list); + } + return MG_SSL_OK; +} + +static enum mg_ssl_if_result mg_ssl_if_mbed_set_psk(struct mg_ssl_if_ctx *ctx, + const char *identity, + const char *key_str) { + unsigned char key[32]; + size_t key_len; + if (identity == NULL && key_str == NULL) return MG_SSL_OK; + if (identity == NULL || key_str == NULL) return MG_SSL_ERROR; + key_len = strlen(key_str); + if (key_len != 32 && key_len != 64) return MG_SSL_ERROR; + size_t i = 0; + memset(key, 0, sizeof(key)); + key_len = 0; + for (i = 0; key_str[i] != '\0'; i++) { + unsigned char c; + char hc = tolower((int) key_str[i]); + if (hc >= '0' && hc <= '9') { + c = hc - '0'; + } else if (hc >= 'a' && hc <= 'f') { + c = hc - 'a' + 0xa; + } else { + return MG_SSL_ERROR; + } + key_len = i / 2; + key[key_len] <<= 4; + key[key_len] |= c; + } + key_len++; + DBG(("identity = '%s', key = (%u)", identity, (unsigned int) key_len)); + /* mbedTLS makes copies of psk and identity. */ + if (mbedtls_ssl_conf_psk(ctx->conf, (const unsigned char *) key, key_len, + (const unsigned char *) identity, + strlen(identity)) != 0) { + return MG_SSL_ERROR; + } + return MG_SSL_OK; +} + +const char *mg_set_ssl(struct mg_connection *nc, const char *cert, + const char *ca_cert) { + const char *err_msg = NULL; + struct mg_ssl_if_conn_params params; + memset(¶ms, 0, sizeof(params)); + params.cert = cert; + params.ca_cert = ca_cert; + if (mg_ssl_if_conn_init(nc, ¶ms, &err_msg) != MG_SSL_OK) { + return err_msg; + } + return NULL; +} + +/* Lazy RNG. Warning: it would be a bad idea to do this in production! */ +#ifdef MG_SSL_MBED_DUMMY_RANDOM +int mg_ssl_if_mbed_random(void *ctx, unsigned char *buf, size_t len) { + (void) ctx; + while (len--) *buf++ = rand(); + return 0; +} +#endif + +#endif /* MG_ENABLE_SSL && MG_SSL_IF == MG_SSL_IF_MBEDTLS */ +#ifdef MG_MODULE_LINES +#line 1 "mongoose/src/uri.c" +#endif +/* + * Copyright (c) 2014 Cesanta Software Limited + * All rights reserved + */ + +/* Amalgamated: #include "mongoose/src/internal.h" */ +/* Amalgamated: #include "mongoose/src/uri.h" */ + +/* + * scan string until encountering one of `seps`, keeping track of component + * boundaries in `res`. + * + * `p` will point to the char after the separator or it will be `end`. + */ +static void parse_uri_component(const char **p, const char *end, + const char *seps, struct mg_str *res) { + const char *q; + res->p = *p; + for (; *p < end; (*p)++) { + for (q = seps; *q != '\0'; q++) { + if (**p == *q) break; + } + if (*q != '\0') break; + } + res->len = (*p) - res->p; + if (*p < end) (*p)++; +} + +int mg_parse_uri(const struct mg_str uri, struct mg_str *scheme, + struct mg_str *user_info, struct mg_str *host, + unsigned int *port, struct mg_str *path, struct mg_str *query, + struct mg_str *fragment) { + struct mg_str rscheme = {0, 0}, ruser_info = {0, 0}, rhost = {0, 0}, + rpath = {0, 0}, rquery = {0, 0}, rfragment = {0, 0}; + unsigned int rport = 0; + enum { + P_START, + P_SCHEME_OR_PORT, + P_USER_INFO, + P_HOST, + P_PORT, + P_REST + } state = P_START; + + const char *p = uri.p, *end = p + uri.len; + while (p < end) { + switch (state) { + case P_START: + /* + * expecting on of: + * - `scheme://xxxx` + * - `xxxx:port` + * - `[a:b:c]:port` + * - `xxxx/path` + */ + if (*p == '[') { + state = P_HOST; + break; + } + for (; p < end; p++) { + if (*p == ':') { + state = P_SCHEME_OR_PORT; + break; + } else if (*p == '/') { + state = P_REST; + break; + } + } + if (state == P_START || state == P_REST) { + rhost.p = uri.p; + rhost.len = p - uri.p; + } + break; + case P_SCHEME_OR_PORT: + if (end - p >= 3 && strncmp(p, "://", 3) == 0) { + rscheme.p = uri.p; + rscheme.len = p - uri.p; + state = P_USER_INFO; + p += 3; + } else { + rhost.p = uri.p; + rhost.len = p - uri.p; + state = P_PORT; + } + break; + case P_USER_INFO: + ruser_info.p = p; + for (; p < end; p++) { + if (*p == '@' || *p == '[' || *p == '/') { + break; + } + } + if (p == end || *p == '/' || *p == '[') { + /* backtrack and parse as host */ + p = ruser_info.p; + } + ruser_info.len = p - ruser_info.p; + state = P_HOST; + break; + case P_HOST: + if (*p == '@') p++; + rhost.p = p; + if (*p == '[') { + int found = 0; + for (; !found && p < end; p++) { + found = (*p == ']'); + } + if (!found) return -1; + } else { + for (; p < end; p++) { + if (*p == ':' || *p == '/') break; + } + } + rhost.len = p - rhost.p; + if (p < end) { + if (*p == ':') { + state = P_PORT; + break; + } else if (*p == '/') { + state = P_REST; + break; + } + } + break; + case P_PORT: + p++; + for (; p < end; p++) { + if (*p == '/') { + state = P_REST; + break; + } + rport *= 10; + rport += *p - '0'; + } + break; + case P_REST: + /* `p` points to separator. `path` includes the separator */ + parse_uri_component(&p, end, "?#", &rpath); + if (p < end && *(p - 1) == '?') { + parse_uri_component(&p, end, "#", &rquery); + } + parse_uri_component(&p, end, "", &rfragment); + break; + } + } + + if (scheme != 0) *scheme = rscheme; + if (user_info != 0) *user_info = ruser_info; + if (host != 0) *host = rhost; + if (port != 0) *port = rport; + if (path != 0) *path = rpath; + if (query != 0) *query = rquery; + if (fragment != 0) *fragment = rfragment; + + return 0; +} + +/* Normalize the URI path. Remove/resolve "." and "..". */ +int mg_normalize_uri_path(const struct mg_str *in, struct mg_str *out) { + const char *s = in->p, *se = s + in->len; + char *cp = (char *) out->p, *d; + + if (in->len == 0 || *s != '/') { + out->len = 0; + return 0; + } + + d = cp; + + while (s < se) { + const char *next = s; + struct mg_str component; + parse_uri_component(&next, se, "/", &component); + if (mg_vcmp(&component, ".") == 0) { + /* Yum. */ + } else if (mg_vcmp(&component, "..") == 0) { + /* Backtrack to previous slash. */ + if (d > cp + 1 && *(d - 1) == '/') d--; + while (d > cp && *(d - 1) != '/') d--; + } else { + memmove(d, s, next - s); + d += next - s; + } + s = next; + } + if (d == cp) *d++ = '/'; + + out->p = cp; + out->len = d - cp; + return 1; +} + +int mg_assemble_uri(const struct mg_str *scheme, const struct mg_str *user_info, + const struct mg_str *host, unsigned int port, + const struct mg_str *path, const struct mg_str *query, + const struct mg_str *fragment, int normalize_path, + struct mg_str *uri) { + int result = -1; + struct mbuf out; + mbuf_init(&out, 0); + + if (scheme != NULL && scheme->len > 0) { + mbuf_append(&out, scheme->p, scheme->len); + mbuf_append(&out, "://", 3); + } + + if (user_info != NULL && user_info->len > 0) { + mbuf_append(&out, user_info->p, user_info->len); + mbuf_append(&out, "@", 1); + } + + if (host != NULL && host->len > 0) { + mbuf_append(&out, host->p, host->len); + } + + if (port != 0) { + char port_str[20]; + int port_str_len = sprintf(port_str, ":%u", port); + mbuf_append(&out, port_str, port_str_len); + } + + if (path != NULL && path->len > 0) { + if (normalize_path) { + struct mg_str npath = mg_strdup(*path); + if (npath.len != path->len) goto out; + if (!mg_normalize_uri_path(path, &npath)) { + free((void *) npath.p); + goto out; + } + mbuf_append(&out, npath.p, npath.len); + free((void *) npath.p); + } else { + mbuf_append(&out, path->p, path->len); + } + } else if (normalize_path) { + mbuf_append(&out, "/", 1); + } + + if (query != NULL && query->len > 0) { + mbuf_append(&out, "?", 1); + mbuf_append(&out, query->p, query->len); + } + + if (fragment != NULL && fragment->len > 0) { + mbuf_append(&out, "#", 1); + mbuf_append(&out, fragment->p, fragment->len); + } + + result = 0; + +out: + if (result == 0) { + uri->p = out.buf; + uri->len = out.len; + } else { + mbuf_free(&out); + uri->p = NULL; + uri->len = 0; + } + return result; +} +#ifdef MG_MODULE_LINES +#line 1 "mongoose/src/http.c" +#endif +/* + * Copyright (c) 2014 Cesanta Software Limited + * All rights reserved + */ + +#if MG_ENABLE_HTTP + +/* Amalgamated: #include "common/md5.h" */ +/* Amalgamated: #include "mongoose/src/internal.h" */ +/* Amalgamated: #include "mongoose/src/util.h" */ + +static const char *mg_version_header = "Mongoose/" MG_VERSION; + +enum mg_http_proto_data_type { DATA_NONE, DATA_FILE, DATA_PUT }; + +struct mg_http_proto_data_file { + FILE *fp; /* Opened file. */ + int64_t cl; /* Content-Length. How many bytes to send. */ + int64_t sent; /* How many bytes have been already sent. */ + int keepalive; /* Keep connection open after sending. */ + enum mg_http_proto_data_type type; +}; + +#if MG_ENABLE_HTTP_CGI +struct mg_http_proto_data_cgi { + struct mg_connection *cgi_nc; +}; +#endif + +struct mg_http_proto_data_chuncked { + int64_t body_len; /* How many bytes of chunked body was reassembled. */ +}; + +struct mg_http_endpoint { + struct mg_http_endpoint *next; + struct mg_str uri_pattern; /* owned */ + char *auth_domain; /* owned */ + char *auth_file; /* owned */ + + mg_event_handler_t handler; +#if MG_ENABLE_CALLBACK_USERDATA + void *user_data; +#endif +}; + +enum mg_http_multipart_stream_state { + MPS_BEGIN, + MPS_WAITING_FOR_BOUNDARY, + MPS_WAITING_FOR_CHUNK, + MPS_GOT_CHUNK, + MPS_GOT_BOUNDARY, + MPS_FINALIZE, + MPS_FINISHED +}; + +struct mg_http_multipart_stream { + const char *boundary; + int boundary_len; + const char *var_name; + const char *file_name; + void *user_data; + int prev_io_len; + enum mg_http_multipart_stream_state state; + int processing_part; +}; + +struct mg_reverse_proxy_data { + struct mg_connection *linked_conn; +}; + +struct mg_ws_proto_data { + size_t reass_len; /* Defragmented size of the frame so far. */ +}; + +struct mg_http_proto_data { +#if MG_ENABLE_FILESYSTEM + struct mg_http_proto_data_file file; +#endif +#if MG_ENABLE_HTTP_CGI + struct mg_http_proto_data_cgi cgi; +#endif +#if MG_ENABLE_HTTP_STREAMING_MULTIPART + struct mg_http_multipart_stream mp_stream; +#endif +#if MG_ENABLE_HTTP_WEBSOCKET + struct mg_ws_proto_data ws_data; +#endif + struct mg_http_proto_data_chuncked chunk; + struct mg_http_endpoint *endpoints; + mg_event_handler_t endpoint_handler; + struct mg_reverse_proxy_data reverse_proxy_data; + size_t rcvd; /* How many bytes we have received. */ +}; + +static void mg_http_conn_destructor(void *proto_data); +struct mg_connection *mg_connect_http_base( + struct mg_mgr *mgr, MG_CB(mg_event_handler_t ev_handler, void *user_data), + struct mg_connect_opts opts, const char *scheme1, const char *scheme2, + const char *scheme_ssl1, const char *scheme_ssl2, const char *url, + struct mg_str *path, struct mg_str *user_info, struct mg_str *host); + +static struct mg_http_proto_data *mg_http_get_proto_data( + struct mg_connection *c) { + if (c->proto_data == NULL) { + c->proto_data = MG_CALLOC(1, sizeof(struct mg_http_proto_data)); + c->proto_data_destructor = mg_http_conn_destructor; + } + + return (struct mg_http_proto_data *) c->proto_data; +} + +#if MG_ENABLE_HTTP_STREAMING_MULTIPART +static void mg_http_free_proto_data_mp_stream( + struct mg_http_multipart_stream *mp) { + MG_FREE((void *) mp->boundary); + MG_FREE((void *) mp->var_name); + MG_FREE((void *) mp->file_name); + memset(mp, 0, sizeof(*mp)); +} +#endif + +#if MG_ENABLE_FILESYSTEM +static void mg_http_free_proto_data_file(struct mg_http_proto_data_file *d) { + if (d != NULL) { + if (d->fp != NULL) { + fclose(d->fp); + } + memset(d, 0, sizeof(struct mg_http_proto_data_file)); + } +} +#endif + +static void mg_http_free_proto_data_endpoints(struct mg_http_endpoint **ep) { + struct mg_http_endpoint *current = *ep; + + while (current != NULL) { + struct mg_http_endpoint *tmp = current->next; + MG_FREE((void *) current->uri_pattern.p); + MG_FREE((void *) current->auth_domain); + MG_FREE((void *) current->auth_file); + MG_FREE(current); + current = tmp; + } + + ep = NULL; +} + +static void mg_http_free_reverse_proxy_data(struct mg_reverse_proxy_data *rpd) { + if (rpd->linked_conn != NULL) { + /* + * Connection has linked one, we have to unlink & close it + * since _this_ connection is going to die and + * it doesn't make sense to keep another one + */ + struct mg_http_proto_data *pd = mg_http_get_proto_data(rpd->linked_conn); + if (pd->reverse_proxy_data.linked_conn != NULL) { + pd->reverse_proxy_data.linked_conn->flags |= MG_F_SEND_AND_CLOSE; + pd->reverse_proxy_data.linked_conn = NULL; + } + rpd->linked_conn = NULL; + } +} + +static void mg_http_conn_destructor(void *proto_data) { + struct mg_http_proto_data *pd = (struct mg_http_proto_data *) proto_data; +#if MG_ENABLE_FILESYSTEM + mg_http_free_proto_data_file(&pd->file); +#endif +#if MG_ENABLE_HTTP_CGI + mg_http_free_proto_data_cgi(&pd->cgi); +#endif +#if MG_ENABLE_HTTP_STREAMING_MULTIPART + mg_http_free_proto_data_mp_stream(&pd->mp_stream); +#endif + mg_http_free_proto_data_endpoints(&pd->endpoints); + mg_http_free_reverse_proxy_data(&pd->reverse_proxy_data); + MG_FREE(proto_data); +} + +#if MG_ENABLE_FILESYSTEM + +#define MIME_ENTRY(_ext, _type) \ + { _ext, sizeof(_ext) - 1, _type } +static const struct { + const char *extension; + size_t ext_len; + const char *mime_type; +} mg_static_builtin_mime_types[] = { + MIME_ENTRY("html", "text/html"), + MIME_ENTRY("html", "text/html"), + MIME_ENTRY("htm", "text/html"), + MIME_ENTRY("shtm", "text/html"), + MIME_ENTRY("shtml", "text/html"), + MIME_ENTRY("css", "text/css"), + MIME_ENTRY("js", "application/x-javascript"), + MIME_ENTRY("ico", "image/x-icon"), + MIME_ENTRY("gif", "image/gif"), + MIME_ENTRY("jpg", "image/jpeg"), + MIME_ENTRY("jpeg", "image/jpeg"), + MIME_ENTRY("png", "image/png"), + MIME_ENTRY("svg", "image/svg+xml"), + MIME_ENTRY("txt", "text/plain"), + MIME_ENTRY("torrent", "application/x-bittorrent"), + MIME_ENTRY("wav", "audio/x-wav"), + MIME_ENTRY("mp3", "audio/x-mp3"), + MIME_ENTRY("mid", "audio/mid"), + MIME_ENTRY("m3u", "audio/x-mpegurl"), + MIME_ENTRY("ogg", "application/ogg"), + MIME_ENTRY("ram", "audio/x-pn-realaudio"), + MIME_ENTRY("xml", "text/xml"), + MIME_ENTRY("ttf", "application/x-font-ttf"), + MIME_ENTRY("json", "application/json"), + MIME_ENTRY("xslt", "application/xml"), + MIME_ENTRY("xsl", "application/xml"), + MIME_ENTRY("ra", "audio/x-pn-realaudio"), + MIME_ENTRY("doc", "application/msword"), + MIME_ENTRY("exe", "application/octet-stream"), + MIME_ENTRY("zip", "application/x-zip-compressed"), + MIME_ENTRY("xls", "application/excel"), + MIME_ENTRY("tgz", "application/x-tar-gz"), + MIME_ENTRY("tar", "application/x-tar"), + MIME_ENTRY("gz", "application/x-gunzip"), + MIME_ENTRY("arj", "application/x-arj-compressed"), + MIME_ENTRY("rar", "application/x-rar-compressed"), + MIME_ENTRY("rtf", "application/rtf"), + MIME_ENTRY("pdf", "application/pdf"), + MIME_ENTRY("swf", "application/x-shockwave-flash"), + MIME_ENTRY("mpg", "video/mpeg"), + MIME_ENTRY("webm", "video/webm"), + MIME_ENTRY("mpeg", "video/mpeg"), + MIME_ENTRY("mov", "video/quicktime"), + MIME_ENTRY("mp4", "video/mp4"), + MIME_ENTRY("m4v", "video/x-m4v"), + MIME_ENTRY("asf", "video/x-ms-asf"), + MIME_ENTRY("avi", "video/x-msvideo"), + MIME_ENTRY("bmp", "image/bmp"), + {NULL, 0, NULL}}; + +static struct mg_str mg_get_mime_type(const char *path, const char *dflt, + const struct mg_serve_http_opts *opts) { + const char *ext, *overrides; + size_t i, path_len; + struct mg_str r, k, v; + + path_len = strlen(path); + + overrides = opts->custom_mime_types; + while ((overrides = mg_next_comma_list_entry(overrides, &k, &v)) != NULL) { + ext = path + (path_len - k.len); + if (path_len > k.len && mg_vcasecmp(&k, ext) == 0) { + return v; + } + } + + for (i = 0; mg_static_builtin_mime_types[i].extension != NULL; i++) { + ext = path + (path_len - mg_static_builtin_mime_types[i].ext_len); + if (path_len > mg_static_builtin_mime_types[i].ext_len && ext[-1] == '.' && + mg_casecmp(ext, mg_static_builtin_mime_types[i].extension) == 0) { + r.p = mg_static_builtin_mime_types[i].mime_type; + r.len = strlen(r.p); + return r; + } + } + + r.p = dflt; + r.len = strlen(r.p); + return r; +} +#endif + +/* + * Check whether full request is buffered. Return: + * -1 if request is malformed + * 0 if request is not yet fully buffered + * >0 actual request length, including last \r\n\r\n + */ +static int mg_http_get_request_len(const char *s, int buf_len) { + const unsigned char *buf = (unsigned char *) s; + int i; + + for (i = 0; i < buf_len; i++) { + if (!isprint(buf[i]) && buf[i] != '\r' && buf[i] != '\n' && buf[i] < 128) { + return -1; + } else if (buf[i] == '\n' && i + 1 < buf_len && buf[i + 1] == '\n') { + return i + 2; + } else if (buf[i] == '\n' && i + 2 < buf_len && buf[i + 1] == '\r' && + buf[i + 2] == '\n') { + return i + 3; + } + } + + return 0; +} + +static const char *mg_http_parse_headers(const char *s, const char *end, + int len, struct http_message *req) { + int i = 0; + while (i < (int) ARRAY_SIZE(req->header_names) - 1) { + struct mg_str *k = &req->header_names[i], *v = &req->header_values[i]; + + s = mg_skip(s, end, ": ", k); + s = mg_skip(s, end, "\r\n", v); + + while (v->len > 0 && v->p[v->len - 1] == ' ') { + v->len--; /* Trim trailing spaces in header value */ + } + + /* + * If header value is empty - skip it and go to next (if any). + * NOTE: Do not add it to headers_values because such addition changes API + * behaviour + */ + if (k->len != 0 && v->len == 0) { + continue; + } + + if (k->len == 0 || v->len == 0) { + k->p = v->p = NULL; + k->len = v->len = 0; + break; + } + + if (!mg_ncasecmp(k->p, "Content-Length", 14)) { + req->body.len = (size_t) to64(v->p); + req->message.len = len + req->body.len; + } + + i++; + } + + return s; +} + +int mg_parse_http(const char *s, int n, struct http_message *hm, int is_req) { + const char *end, *qs; + int len = mg_http_get_request_len(s, n); + + if (len <= 0) return len; + + memset(hm, 0, sizeof(*hm)); + hm->message.p = s; + hm->body.p = s + len; + hm->message.len = hm->body.len = (size_t) ~0; + end = s + len; + + /* Request is fully buffered. Skip leading whitespaces. */ + while (s < end && isspace(*(unsigned char *) s)) s++; + + if (is_req) { + /* Parse request line: method, URI, proto */ + s = mg_skip(s, end, " ", &hm->method); + s = mg_skip(s, end, " ", &hm->uri); + s = mg_skip(s, end, "\r\n", &hm->proto); + if (hm->uri.p <= hm->method.p || hm->proto.p <= hm->uri.p) return -1; + + /* If URI contains '?' character, initialize query_string */ + if ((qs = (char *) memchr(hm->uri.p, '?', hm->uri.len)) != NULL) { + hm->query_string.p = qs + 1; + hm->query_string.len = &hm->uri.p[hm->uri.len] - (qs + 1); + hm->uri.len = qs - hm->uri.p; + } + } else { + s = mg_skip(s, end, " ", &hm->proto); + if (end - s < 4 || s[3] != ' ') return -1; + hm->resp_code = atoi(s); + if (hm->resp_code < 100 || hm->resp_code >= 600) return -1; + s += 4; + s = mg_skip(s, end, "\r\n", &hm->resp_status_msg); + } + + s = mg_http_parse_headers(s, end, len, hm); + + /* + * mg_parse_http() is used to parse both HTTP requests and HTTP + * responses. If HTTP response does not have Content-Length set, then + * body is read until socket is closed, i.e. body.len is infinite (~0). + * + * For HTTP requests though, according to + * http://tools.ietf.org/html/rfc7231#section-8.1.3, + * only POST and PUT methods have defined body semantics. + * Therefore, if Content-Length is not specified and methods are + * not one of PUT or POST, set body length to 0. + * + * So, + * if it is HTTP request, and Content-Length is not set, + * and method is not (PUT or POST) then reset body length to zero. + */ + if (hm->body.len == (size_t) ~0 && is_req && + mg_vcasecmp(&hm->method, "PUT") != 0 && + mg_vcasecmp(&hm->method, "POST") != 0) { + hm->body.len = 0; + hm->message.len = len; + } + + return len; +} + +struct mg_str *mg_get_http_header(struct http_message *hm, const char *name) { + size_t i, len = strlen(name); + + for (i = 0; hm->header_names[i].len > 0; i++) { + struct mg_str *h = &hm->header_names[i], *v = &hm->header_values[i]; + if (h->p != NULL && h->len == len && !mg_ncasecmp(h->p, name, len)) + return v; + } + + return NULL; +} + +#if MG_ENABLE_FILESYSTEM +static void mg_http_transfer_file_data(struct mg_connection *nc) { + struct mg_http_proto_data *pd = mg_http_get_proto_data(nc); + char buf[MG_MAX_HTTP_SEND_MBUF]; + size_t n = 0, to_read = 0, left = (size_t)(pd->file.cl - pd->file.sent); + + if (pd->file.type == DATA_FILE) { + struct mbuf *io = &nc->send_mbuf; + if (io->len >= MG_MAX_HTTP_SEND_MBUF) { + to_read = 0; + } else { + to_read = MG_MAX_HTTP_SEND_MBUF - io->len; + } + if (to_read > left) { + to_read = left; + } + if (to_read > 0) { + n = mg_fread(buf, 1, to_read, pd->file.fp); + if (n > 0) { + mg_send(nc, buf, n); + pd->file.sent += n; + DBG(("%p sent %d (total %d)", nc, (int) n, (int) pd->file.sent)); + } + } else { + /* Rate-limited */ + } + if (pd->file.sent >= pd->file.cl) { + LOG(LL_DEBUG, ("%p done, %d bytes", nc, (int) pd->file.sent)); + if (!pd->file.keepalive) nc->flags |= MG_F_SEND_AND_CLOSE; + mg_http_free_proto_data_file(&pd->file); + } + } else if (pd->file.type == DATA_PUT) { + struct mbuf *io = &nc->recv_mbuf; + size_t to_write = left <= 0 ? 0 : left < io->len ? (size_t) left : io->len; + size_t n = mg_fwrite(io->buf, 1, to_write, pd->file.fp); + if (n > 0) { + mbuf_remove(io, n); + pd->file.sent += n; + } + if (n == 0 || pd->file.sent >= pd->file.cl) { + if (!pd->file.keepalive) nc->flags |= MG_F_SEND_AND_CLOSE; + mg_http_free_proto_data_file(&pd->file); + } + } +#if MG_ENABLE_HTTP_CGI + else if (pd->cgi.cgi_nc != NULL) { + /* This is POST data that needs to be forwarded to the CGI process */ + if (pd->cgi.cgi_nc != NULL) { + mg_forward(nc, pd->cgi.cgi_nc); + } else { + nc->flags |= MG_F_SEND_AND_CLOSE; + } + } +#endif +} +#endif /* MG_ENABLE_FILESYSTEM */ + +/* + * Parse chunked-encoded buffer. Return 0 if the buffer is not encoded, or + * if it's incomplete. If the chunk is fully buffered, return total number of + * bytes in a chunk, and store data in `data`, `data_len`. + */ +static size_t mg_http_parse_chunk(char *buf, size_t len, char **chunk_data, + size_t *chunk_len) { + unsigned char *s = (unsigned char *) buf; + size_t n = 0; /* scanned chunk length */ + size_t i = 0; /* index in s */ + + /* Scan chunk length. That should be a hexadecimal number. */ + while (i < len && isxdigit(s[i])) { + n *= 16; + n += (s[i] >= '0' && s[i] <= '9') ? s[i] - '0' : tolower(s[i]) - 'a' + 10; + i++; + } + + /* Skip new line */ + if (i == 0 || i + 2 > len || s[i] != '\r' || s[i + 1] != '\n') { + return 0; + } + i += 2; + + /* Record where the data is */ + *chunk_data = (char *) s + i; + *chunk_len = n; + + /* Skip data */ + i += n; + + /* Skip new line */ + if (i == 0 || i + 2 > len || s[i] != '\r' || s[i + 1] != '\n') { + return 0; + } + return i + 2; +} + +MG_INTERNAL size_t mg_handle_chunked(struct mg_connection *nc, + struct http_message *hm, char *buf, + size_t blen) { + struct mg_http_proto_data *pd = mg_http_get_proto_data(nc); + char *data; + size_t i, n, data_len, body_len, zero_chunk_received = 0; + /* Find out piece of received data that is not yet reassembled */ + body_len = (size_t) pd->chunk.body_len; + assert(blen >= body_len); + + /* Traverse all fully buffered chunks */ + for (i = body_len; + (n = mg_http_parse_chunk(buf + i, blen - i, &data, &data_len)) > 0; + i += n) { + /* Collapse chunk data to the rest of HTTP body */ + memmove(buf + body_len, data, data_len); + body_len += data_len; + hm->body.len = body_len; + + if (data_len == 0) { + zero_chunk_received = 1; + i += n; + break; + } + } + + if (i > body_len) { + /* Shift unparsed content to the parsed body */ + assert(i <= blen); + memmove(buf + body_len, buf + i, blen - i); + memset(buf + body_len + blen - i, 0, i - body_len); + nc->recv_mbuf.len -= i - body_len; + pd->chunk.body_len = body_len; + + /* Send MG_EV_HTTP_CHUNK event */ + nc->flags &= ~MG_F_DELETE_CHUNK; + mg_call(nc, nc->handler, nc->user_data, MG_EV_HTTP_CHUNK, hm); + + /* Delete processed data if user set MG_F_DELETE_CHUNK flag */ + if (nc->flags & MG_F_DELETE_CHUNK) { + memset(buf, 0, body_len); + memmove(buf, buf + body_len, blen - i); + nc->recv_mbuf.len -= body_len; + hm->body.len = 0; + pd->chunk.body_len = 0; + } + + if (zero_chunk_received) { + /* Total message size is len(body) + len(headers) */ + hm->message.len = + (size_t) pd->chunk.body_len + blen - i + (hm->body.p - hm->message.p); + } + } + + return body_len; +} + +struct mg_http_endpoint *mg_http_get_endpoint_handler(struct mg_connection *nc, + struct mg_str *uri_path) { + struct mg_http_proto_data *pd; + struct mg_http_endpoint *ret = NULL; + int matched, matched_max = 0; + struct mg_http_endpoint *ep; + + if (nc == NULL) { + return NULL; + } + + pd = mg_http_get_proto_data(nc); + + ep = pd->endpoints; + while (ep != NULL) { + if ((matched = mg_match_prefix_n(ep->uri_pattern, *uri_path)) != -1) { + if (matched > matched_max) { + /* Looking for the longest suitable handler */ + ret = ep; + matched_max = matched; + } + } + + ep = ep->next; + } + + return ret; +} + +#if MG_ENABLE_HTTP_STREAMING_MULTIPART +static void mg_http_multipart_continue(struct mg_connection *nc); + +static void mg_http_multipart_begin(struct mg_connection *nc, + struct http_message *hm, int req_len); + +#endif + +static void mg_http_call_endpoint_handler(struct mg_connection *nc, int ev, + struct http_message *hm); + +static void deliver_chunk(struct mg_connection *c, struct http_message *hm, + int req_len) { + /* Incomplete message received. Send MG_EV_HTTP_CHUNK event */ + hm->body.len = c->recv_mbuf.len - req_len; + c->flags &= ~MG_F_DELETE_CHUNK; + mg_call(c, c->handler, c->user_data, MG_EV_HTTP_CHUNK, hm); + /* Delete processed data if user set MG_F_DELETE_CHUNK flag */ + if (c->flags & MG_F_DELETE_CHUNK) c->recv_mbuf.len = req_len; +} + +/* + * lx106 compiler has a bug (TODO(mkm) report and insert tracking bug here) + * If a big structure is declared in a big function, lx106 gcc will make it + * even bigger (round up to 4k, from 700 bytes of actual size). + */ +#ifdef __xtensa__ +static void mg_http_handler2(struct mg_connection *nc, int ev, + void *ev_data MG_UD_ARG(void *user_data), + struct http_message *hm) __attribute__((noinline)); + +void mg_http_handler(struct mg_connection *nc, int ev, + void *ev_data MG_UD_ARG(void *user_data)) { + struct http_message hm; + mg_http_handler2(nc, ev, ev_data MG_UD_ARG(user_data), &hm); +} + +static void mg_http_handler2(struct mg_connection *nc, int ev, + void *ev_data MG_UD_ARG(void *user_data), + struct http_message *hm) { +#else /* !__XTENSA__ */ +void mg_http_handler(struct mg_connection *nc, int ev, + void *ev_data MG_UD_ARG(void *user_data)) { + struct http_message shm, *hm = &shm; +#endif /* __XTENSA__ */ + struct mg_http_proto_data *pd = mg_http_get_proto_data(nc); + struct mbuf *io = &nc->recv_mbuf; + int req_len; + const int is_req = (nc->listener != NULL); +#if MG_ENABLE_HTTP_WEBSOCKET + struct mg_str *vec; +#endif + if (ev == MG_EV_CLOSE) { +#if MG_ENABLE_HTTP_CGI + /* Close associated CGI forwarder connection */ + if (pd->cgi.cgi_nc != NULL) { + pd->cgi.cgi_nc->user_data = NULL; + pd->cgi.cgi_nc->flags |= MG_F_CLOSE_IMMEDIATELY; + } +#endif +#if MG_ENABLE_HTTP_STREAMING_MULTIPART + if (pd->mp_stream.boundary != NULL) { + /* + * Multipart message is in progress, but connection is closed. + * Finish part and request with an error flag. + */ + struct mg_http_multipart_part mp; + memset(&mp, 0, sizeof(mp)); + mp.status = -1; + mp.var_name = pd->mp_stream.var_name; + mp.file_name = pd->mp_stream.file_name; + mg_call(nc, (pd->endpoint_handler ? pd->endpoint_handler : nc->handler), + nc->user_data, MG_EV_HTTP_PART_END, &mp); + mp.var_name = NULL; + mp.file_name = NULL; + mg_call(nc, (pd->endpoint_handler ? pd->endpoint_handler : nc->handler), + nc->user_data, MG_EV_HTTP_MULTIPART_REQUEST_END, &mp); + } else +#endif + if (io->len > 0 && + (req_len = mg_parse_http(io->buf, io->len, hm, is_req)) > 0) { + /* + * For HTTP messages without Content-Length, always send HTTP message + * before MG_EV_CLOSE message. + */ + int ev2 = is_req ? MG_EV_HTTP_REQUEST : MG_EV_HTTP_REPLY; + hm->message.len = io->len; + hm->body.len = io->buf + io->len - hm->body.p; + deliver_chunk(nc, hm, req_len); + mg_http_call_endpoint_handler(nc, ev2, hm); + } + pd->rcvd = 0; + } + +#if MG_ENABLE_FILESYSTEM + if (pd->file.fp != NULL) { + mg_http_transfer_file_data(nc); + } +#endif + + mg_call(nc, nc->handler, nc->user_data, ev, ev_data); + + if (ev == MG_EV_RECV) { + struct mg_str *s; + pd->rcvd += *(int *) ev_data; + +#if MG_ENABLE_HTTP_STREAMING_MULTIPART + if (pd->mp_stream.boundary != NULL) { + mg_http_multipart_continue(nc); + return; + } +#endif /* MG_ENABLE_HTTP_STREAMING_MULTIPART */ + + req_len = mg_parse_http(io->buf, io->len, hm, is_req); + + if (req_len > 0 && + (s = mg_get_http_header(hm, "Transfer-Encoding")) != NULL && + mg_vcasecmp(s, "chunked") == 0) { + mg_handle_chunked(nc, hm, io->buf + req_len, io->len - req_len); + } + +#if MG_ENABLE_HTTP_STREAMING_MULTIPART + if (req_len > 0 && (s = mg_get_http_header(hm, "Content-Type")) != NULL && + s->len >= 9 && strncmp(s->p, "multipart", 9) == 0) { + mg_http_multipart_begin(nc, hm, req_len); + mg_http_multipart_continue(nc); + return; + } +#endif /* MG_ENABLE_HTTP_STREAMING_MULTIPART */ + + /* TODO(alashkin): refactor this ifelseifelseifelseifelse */ + if ((req_len < 0 || + (req_len == 0 && io->len >= MG_MAX_HTTP_REQUEST_SIZE))) { + DBG(("invalid request")); + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + } else if (req_len == 0) { + /* Do nothing, request is not yet fully buffered */ + } +#if MG_ENABLE_HTTP_WEBSOCKET + else if (nc->listener == NULL && + mg_get_http_header(hm, "Sec-WebSocket-Accept")) { + /* We're websocket client, got handshake response from server. */ + /* TODO(lsm): check the validity of accept Sec-WebSocket-Accept */ + mbuf_remove(io, req_len); + nc->proto_handler = mg_ws_handler; + nc->flags |= MG_F_IS_WEBSOCKET; + mg_call(nc, nc->handler, nc->user_data, MG_EV_WEBSOCKET_HANDSHAKE_DONE, + NULL); + mg_ws_handler(nc, MG_EV_RECV, ev_data MG_UD_ARG(user_data)); + } else if (nc->listener != NULL && + (vec = mg_get_http_header(hm, "Sec-WebSocket-Key")) != NULL) { + struct mg_http_endpoint *ep; + + /* This is a websocket request. Switch protocol handlers. */ + mbuf_remove(io, req_len); + nc->proto_handler = mg_ws_handler; + nc->flags |= MG_F_IS_WEBSOCKET; + + /* + * If we have a handler set up with mg_register_http_endpoint(), + * deliver subsequent websocket events to this handler after the + * protocol switch. + */ + ep = mg_http_get_endpoint_handler(nc->listener, &hm->uri); + if (ep != NULL) { + nc->handler = ep->handler; +#if MG_ENABLE_CALLBACK_USERDATA + nc->user_data = ep->user_data; +#endif + } + + /* Send handshake */ + mg_call(nc, nc->handler, nc->user_data, MG_EV_WEBSOCKET_HANDSHAKE_REQUEST, + hm); + if (!(nc->flags & (MG_F_CLOSE_IMMEDIATELY | MG_F_SEND_AND_CLOSE))) { + if (nc->send_mbuf.len == 0) { + mg_ws_handshake(nc, vec, hm); + } + mg_call(nc, nc->handler, nc->user_data, MG_EV_WEBSOCKET_HANDSHAKE_DONE, + NULL); + mg_ws_handler(nc, MG_EV_RECV, ev_data MG_UD_ARG(user_data)); + } + } +#endif /* MG_ENABLE_HTTP_WEBSOCKET */ + else if (hm->message.len > pd->rcvd) { + /* Not yet received all HTTP body, deliver MG_EV_HTTP_CHUNK */ + deliver_chunk(nc, hm, req_len); + if (nc->recv_mbuf_limit > 0 && nc->recv_mbuf.len >= nc->recv_mbuf_limit) { + LOG(LL_ERROR, ("%p recv buffer (%lu bytes) exceeds the limit " + "%lu bytes, and not drained, closing", + nc, (unsigned long) nc->recv_mbuf.len, + (unsigned long) nc->recv_mbuf_limit)); + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + } + } else { + /* We did receive all HTTP body. */ + int trigger_ev = nc->listener ? MG_EV_HTTP_REQUEST : MG_EV_HTTP_REPLY; + char addr[32]; + mg_sock_addr_to_str(&nc->sa, addr, sizeof(addr), + MG_SOCK_STRINGIFY_IP | MG_SOCK_STRINGIFY_PORT); + DBG(("%p %s %.*s %.*s", nc, addr, (int) hm->method.len, hm->method.p, + (int) hm->uri.len, hm->uri.p)); + deliver_chunk(nc, hm, req_len); + /* Whole HTTP message is fully buffered, call event handler */ + mg_http_call_endpoint_handler(nc, trigger_ev, hm); + mbuf_remove(io, hm->message.len); + pd->rcvd = 0; + } + } +} + +static size_t mg_get_line_len(const char *buf, size_t buf_len) { + size_t len = 0; + while (len < buf_len && buf[len] != '\n') len++; + return len == buf_len ? 0 : len + 1; +} + +#if MG_ENABLE_HTTP_STREAMING_MULTIPART +static void mg_http_multipart_begin(struct mg_connection *nc, + struct http_message *hm, int req_len) { + struct mg_http_proto_data *pd = mg_http_get_proto_data(nc); + struct mg_str *ct; + struct mbuf *io = &nc->recv_mbuf; + + char boundary[100]; + int boundary_len; + + ct = mg_get_http_header(hm, "Content-Type"); + if (ct == NULL) { + /* We need more data - or it isn't multipart mesage */ + goto exit_mp; + } + + /* Content-type should start with "multipart" */ + if (ct->len < 9 || strncmp(ct->p, "multipart", 9) != 0) { + goto exit_mp; + } + + boundary_len = + mg_http_parse_header(ct, "boundary", boundary, sizeof(boundary)); + if (boundary_len == 0) { + /* + * Content type is multipart, but there is no boundary, + * probably malformed request + */ + nc->flags = MG_F_CLOSE_IMMEDIATELY; + DBG(("invalid request")); + goto exit_mp; + } + + /* If we reach this place - that is multipart request */ + + if (pd->mp_stream.boundary != NULL) { + /* + * Another streaming request was in progress, + * looks like protocol error + */ + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + } else { + struct mg_http_endpoint *ep = NULL; + pd->mp_stream.state = MPS_BEGIN; + pd->mp_stream.boundary = strdup(boundary); + pd->mp_stream.boundary_len = strlen(boundary); + pd->mp_stream.var_name = pd->mp_stream.file_name = NULL; + pd->endpoint_handler = nc->handler; + + ep = mg_http_get_endpoint_handler(nc->listener, &hm->uri); + if (ep != NULL) { + pd->endpoint_handler = ep->handler; + } + + mg_http_call_endpoint_handler(nc, MG_EV_HTTP_MULTIPART_REQUEST, hm); + + mbuf_remove(io, req_len); + } +exit_mp: + ; +} + +#define CONTENT_DISPOSITION "Content-Disposition: " + +static void mg_http_multipart_call_handler(struct mg_connection *c, int ev, + const char *data, size_t data_len) { + struct mg_http_multipart_part mp; + struct mg_http_proto_data *pd = mg_http_get_proto_data(c); + memset(&mp, 0, sizeof(mp)); + + mp.var_name = pd->mp_stream.var_name; + mp.file_name = pd->mp_stream.file_name; + mp.user_data = pd->mp_stream.user_data; + mp.data.p = data; + mp.data.len = data_len; + mg_call(c, pd->endpoint_handler, c->user_data, ev, &mp); + pd->mp_stream.user_data = mp.user_data; +} + +static int mg_http_multipart_got_chunk(struct mg_connection *c) { + struct mg_http_proto_data *pd = mg_http_get_proto_data(c); + struct mbuf *io = &c->recv_mbuf; + + mg_http_multipart_call_handler(c, MG_EV_HTTP_PART_DATA, io->buf, + pd->mp_stream.prev_io_len); + mbuf_remove(io, pd->mp_stream.prev_io_len); + pd->mp_stream.prev_io_len = 0; + pd->mp_stream.state = MPS_WAITING_FOR_CHUNK; + + return 0; +} + +static int mg_http_multipart_finalize(struct mg_connection *c) { + struct mg_http_proto_data *pd = mg_http_get_proto_data(c); + + mg_http_multipart_call_handler(c, MG_EV_HTTP_PART_END, NULL, 0); + MG_FREE((void *) pd->mp_stream.file_name); + pd->mp_stream.file_name = NULL; + MG_FREE((void *) pd->mp_stream.var_name); + pd->mp_stream.var_name = NULL; + mg_http_multipart_call_handler(c, MG_EV_HTTP_MULTIPART_REQUEST_END, NULL, 0); + mg_http_free_proto_data_mp_stream(&pd->mp_stream); + pd->mp_stream.state = MPS_FINISHED; + + return 1; +} + +static int mg_http_multipart_wait_for_boundary(struct mg_connection *c) { + const char *boundary; + struct mbuf *io = &c->recv_mbuf; + struct mg_http_proto_data *pd = mg_http_get_proto_data(c); + + if (pd->mp_stream.boundary == NULL) { + pd->mp_stream.state = MPS_FINALIZE; + DBG(("Invalid request: boundary not initialized")); + return 0; + } + + if ((int) io->len < pd->mp_stream.boundary_len + 2) { + return 0; + } + + boundary = c_strnstr(io->buf, pd->mp_stream.boundary, io->len); + if (boundary != NULL) { + const char *boundary_end = (boundary + pd->mp_stream.boundary_len); + if (io->len - (boundary_end - io->buf) < 4) { + return 0; + } + if (strncmp(boundary_end, "--\r\n", 4) == 0) { + pd->mp_stream.state = MPS_FINALIZE; + mbuf_remove(io, (boundary_end - io->buf) + 4); + } else { + pd->mp_stream.state = MPS_GOT_BOUNDARY; + } + } else { + return 0; + } + + return 1; +} + +static int mg_http_multipart_process_boundary(struct mg_connection *c) { + int data_size; + const char *boundary, *block_begin; + struct mbuf *io = &c->recv_mbuf; + struct mg_http_proto_data *pd = mg_http_get_proto_data(c); + char file_name[100], var_name[100]; + int line_len; + boundary = c_strnstr(io->buf, pd->mp_stream.boundary, io->len); + block_begin = boundary + pd->mp_stream.boundary_len + 2; + data_size = io->len - (block_begin - io->buf); + + while (data_size > 0 && + (line_len = mg_get_line_len(block_begin, data_size)) != 0) { + if (line_len > (int) sizeof(CONTENT_DISPOSITION) && + mg_ncasecmp(block_begin, CONTENT_DISPOSITION, + sizeof(CONTENT_DISPOSITION) - 1) == 0) { + struct mg_str header; + + header.p = block_begin + sizeof(CONTENT_DISPOSITION) - 1; + header.len = line_len - sizeof(CONTENT_DISPOSITION) - 1; + mg_http_parse_header(&header, "name", var_name, sizeof(var_name) - 2); + mg_http_parse_header(&header, "filename", file_name, + sizeof(file_name) - 2); + block_begin += line_len; + data_size -= line_len; + continue; + } + + if (line_len == 2 && mg_ncasecmp(block_begin, "\r\n", 2) == 0) { + mbuf_remove(io, block_begin - io->buf + 2); + + if (pd->mp_stream.processing_part != 0) { + mg_http_multipart_call_handler(c, MG_EV_HTTP_PART_END, NULL, 0); + } + + MG_FREE((void *) pd->mp_stream.file_name); + pd->mp_stream.file_name = strdup(file_name); + MG_FREE((void *) pd->mp_stream.var_name); + pd->mp_stream.var_name = strdup(var_name); + + mg_http_multipart_call_handler(c, MG_EV_HTTP_PART_BEGIN, NULL, 0); + pd->mp_stream.state = MPS_WAITING_FOR_CHUNK; + pd->mp_stream.processing_part++; + return 1; + } + + block_begin += line_len; + } + + pd->mp_stream.state = MPS_WAITING_FOR_BOUNDARY; + + return 0; +} + +static int mg_http_multipart_continue_wait_for_chunk(struct mg_connection *c) { + struct mg_http_proto_data *pd = mg_http_get_proto_data(c); + struct mbuf *io = &c->recv_mbuf; + + const char *boundary; + if ((int) io->len < pd->mp_stream.boundary_len + 6 /* \r\n, --, -- */) { + return 0; + } + + boundary = c_strnstr(io->buf, pd->mp_stream.boundary, io->len); + if (boundary == NULL && pd->mp_stream.prev_io_len == 0) { + pd->mp_stream.prev_io_len = io->len; + return 0; + } else if (boundary == NULL && + (int) io->len > + pd->mp_stream.prev_io_len + pd->mp_stream.boundary_len + 4) { + pd->mp_stream.state = MPS_GOT_CHUNK; + return 1; + } else if (boundary != NULL) { + int data_size = (boundary - io->buf - 4); + mg_http_multipart_call_handler(c, MG_EV_HTTP_PART_DATA, io->buf, data_size); + mbuf_remove(io, (boundary - io->buf)); + pd->mp_stream.prev_io_len = 0; + pd->mp_stream.state = MPS_WAITING_FOR_BOUNDARY; + return 1; + } else { + return 0; + } +} + +static void mg_http_multipart_continue(struct mg_connection *c) { + struct mg_http_proto_data *pd = mg_http_get_proto_data(c); + while (1) { + switch (pd->mp_stream.state) { + case MPS_BEGIN: { + pd->mp_stream.state = MPS_WAITING_FOR_BOUNDARY; + break; + } + case MPS_WAITING_FOR_BOUNDARY: { + if (mg_http_multipart_wait_for_boundary(c) == 0) { + return; + } + break; + } + case MPS_GOT_BOUNDARY: { + if (mg_http_multipart_process_boundary(c) == 0) { + return; + } + break; + } + case MPS_WAITING_FOR_CHUNK: { + if (mg_http_multipart_continue_wait_for_chunk(c) == 0) { + return; + } + break; + } + case MPS_GOT_CHUNK: { + if (mg_http_multipart_got_chunk(c) == 0) { + return; + } + break; + } + case MPS_FINALIZE: { + if (mg_http_multipart_finalize(c) == 0) { + return; + } + break; + } + case MPS_FINISHED: { + mbuf_remove(&c->recv_mbuf, c->recv_mbuf.len); + return; + } + } + } +} + +struct file_upload_state { + char *lfn; + size_t num_recd; + FILE *fp; +}; + +#endif /* MG_ENABLE_HTTP_STREAMING_MULTIPART */ + +void mg_set_protocol_http_websocket(struct mg_connection *nc) { + nc->proto_handler = mg_http_handler; +} + +const char *mg_status_message(int status_code) { + switch (status_code) { + case 206: + return "Partial Content"; + case 301: + return "Moved"; + case 302: + return "Found"; + case 400: + return "Bad Request"; + case 401: + return "Unauthorized"; + case 403: + return "Forbidden"; + case 404: + return "Not Found"; + case 416: + return "Requested Range Not Satisfiable"; + case 418: + return "I'm a teapot"; + case 500: + return "Internal Server Error"; + case 502: + return "Bad Gateway"; + case 503: + return "Service Unavailable"; + +#if MG_ENABLE_EXTRA_ERRORS_DESC + case 100: + return "Continue"; + case 101: + return "Switching Protocols"; + case 102: + return "Processing"; + case 200: + return "OK"; + case 201: + return "Created"; + case 202: + return "Accepted"; + case 203: + return "Non-Authoritative Information"; + case 204: + return "No Content"; + case 205: + return "Reset Content"; + case 207: + return "Multi-Status"; + case 208: + return "Already Reported"; + case 226: + return "IM Used"; + case 300: + return "Multiple Choices"; + case 303: + return "See Other"; + case 304: + return "Not Modified"; + case 305: + return "Use Proxy"; + case 306: + return "Switch Proxy"; + case 307: + return "Temporary Redirect"; + case 308: + return "Permanent Redirect"; + case 402: + return "Payment Required"; + case 405: + return "Method Not Allowed"; + case 406: + return "Not Acceptable"; + case 407: + return "Proxy Authentication Required"; + case 408: + return "Request Timeout"; + case 409: + return "Conflict"; + case 410: + return "Gone"; + case 411: + return "Length Required"; + case 412: + return "Precondition Failed"; + case 413: + return "Payload Too Large"; + case 414: + return "URI Too Long"; + case 415: + return "Unsupported Media Type"; + case 417: + return "Expectation Failed"; + case 422: + return "Unprocessable Entity"; + case 423: + return "Locked"; + case 424: + return "Failed Dependency"; + case 426: + return "Upgrade Required"; + case 428: + return "Precondition Required"; + case 429: + return "Too Many Requests"; + case 431: + return "Request Header Fields Too Large"; + case 451: + return "Unavailable For Legal Reasons"; + case 501: + return "Not Implemented"; + case 504: + return "Gateway Timeout"; + case 505: + return "HTTP Version Not Supported"; + case 506: + return "Variant Also Negotiates"; + case 507: + return "Insufficient Storage"; + case 508: + return "Loop Detected"; + case 510: + return "Not Extended"; + case 511: + return "Network Authentication Required"; +#endif /* MG_ENABLE_EXTRA_ERRORS_DESC */ + + default: + return "OK"; + } +} + +void mg_send_response_line_s(struct mg_connection *nc, int status_code, + const struct mg_str extra_headers) { + mg_printf(nc, "HTTP/1.1 %d %s\r\nServer: %s\r\n", status_code, + mg_status_message(status_code), mg_version_header); + if (extra_headers.len > 0) { + mg_printf(nc, "%.*s\r\n", (int) extra_headers.len, extra_headers.p); + } +} + +void mg_send_response_line(struct mg_connection *nc, int status_code, + const char *extra_headers) { + mg_send_response_line_s(nc, status_code, mg_mk_str(extra_headers)); +} + +void mg_http_send_redirect(struct mg_connection *nc, int status_code, + const struct mg_str location, + const struct mg_str extra_headers) { + char bbody[100], *pbody = bbody; + int bl = mg_asprintf(&pbody, sizeof(bbody), + "<p>Moved <a href='%.*s'>here</a>.\r\n", + (int) location.len, location.p); + char bhead[150], *phead = bhead; + mg_asprintf(&phead, sizeof(bhead), + "Location: %.*s\r\n" + "Content-Type: text/html\r\n" + "Content-Length: %d\r\n" + "Cache-Control: no-cache\r\n" + "%.*s%s", + (int) location.len, location.p, bl, (int) extra_headers.len, + extra_headers.p, (extra_headers.len > 0 ? "\r\n" : "")); + mg_send_response_line(nc, status_code, phead); + if (phead != bhead) MG_FREE(phead); + mg_send(nc, pbody, bl); + if (pbody != bbody) MG_FREE(pbody); +} + +void mg_send_head(struct mg_connection *c, int status_code, + int64_t content_length, const char *extra_headers) { + mg_send_response_line(c, status_code, extra_headers); + if (content_length < 0) { + mg_printf(c, "%s", "Transfer-Encoding: chunked\r\n"); + } else { + mg_printf(c, "Content-Length: %" INT64_FMT "\r\n", content_length); + } + mg_send(c, "\r\n", 2); +} + +void mg_http_send_error(struct mg_connection *nc, int code, + const char *reason) { + if (!reason) reason = mg_status_message(code); + LOG(LL_DEBUG, ("%p %d %s", nc, code, reason)); + mg_send_head(nc, code, strlen(reason), + "Content-Type: text/plain\r\nConnection: close"); + mg_send(nc, reason, strlen(reason)); + nc->flags |= MG_F_SEND_AND_CLOSE; +} + +#if MG_ENABLE_FILESYSTEM +static void mg_http_construct_etag(char *buf, size_t buf_len, + const cs_stat_t *st) { + snprintf(buf, buf_len, "\"%lx.%" INT64_FMT "\"", (unsigned long) st->st_mtime, + (int64_t) st->st_size); +} + +#ifndef WINCE +static void mg_gmt_time_string(char *buf, size_t buf_len, time_t *t) { + strftime(buf, buf_len, "%a, %d %b %Y %H:%M:%S GMT", gmtime(t)); +} +#else +/* Look wince_lib.c for WindowsCE implementation */ +static void mg_gmt_time_string(char *buf, size_t buf_len, time_t *t); +#endif + +static int mg_http_parse_range_header(const struct mg_str *header, int64_t *a, + int64_t *b) { + /* + * There is no snscanf. Headers are not guaranteed to be NUL-terminated, + * so we have this. Ugh. + */ + int result; + char *p = (char *) MG_MALLOC(header->len + 1); + if (p == NULL) return 0; + memcpy(p, header->p, header->len); + p[header->len] = '\0'; + result = sscanf(p, "bytes=%" INT64_FMT "-%" INT64_FMT, a, b); + MG_FREE(p); + return result; +} + +void mg_http_serve_file(struct mg_connection *nc, struct http_message *hm, + const char *path, const struct mg_str mime_type, + const struct mg_str extra_headers) { + struct mg_http_proto_data *pd = mg_http_get_proto_data(nc); + cs_stat_t st; + LOG(LL_DEBUG, ("%p [%s] %.*s", nc, path, (int) mime_type.len, mime_type.p)); + if (mg_stat(path, &st) != 0 || (pd->file.fp = mg_fopen(path, "rb")) == NULL) { + int code, err = mg_get_errno(); + switch (err) { + case EACCES: + code = 403; + break; + case ENOENT: + code = 404; + break; + default: + code = 500; + }; + mg_http_send_error(nc, code, "Open failed"); + } else { + char etag[50], current_time[50], last_modified[50], range[70]; + time_t t = (time_t) mg_time(); + int64_t r1 = 0, r2 = 0, cl = st.st_size; + struct mg_str *range_hdr = mg_get_http_header(hm, "Range"); + int n, status_code = 200; + + /* Handle Range header */ + range[0] = '\0'; + if (range_hdr != NULL && + (n = mg_http_parse_range_header(range_hdr, &r1, &r2)) > 0 && r1 >= 0 && + r2 >= 0) { + /* If range is specified like "400-", set second limit to content len */ + if (n == 1) { + r2 = cl - 1; + } + if (r1 > r2 || r2 >= cl) { + status_code = 416; + cl = 0; + snprintf(range, sizeof(range), + "Content-Range: bytes */%" INT64_FMT "\r\n", + (int64_t) st.st_size); + } else { + status_code = 206; + cl = r2 - r1 + 1; + snprintf(range, sizeof(range), "Content-Range: bytes %" INT64_FMT + "-%" INT64_FMT "/%" INT64_FMT "\r\n", + r1, r1 + cl - 1, (int64_t) st.st_size); +#if _FILE_OFFSET_BITS == 64 || _POSIX_C_SOURCE >= 200112L || \ + _XOPEN_SOURCE >= 600 + fseeko(pd->file.fp, r1, SEEK_SET); +#else + fseek(pd->file.fp, (long) r1, SEEK_SET); +#endif + } + } + +#if !MG_DISABLE_HTTP_KEEP_ALIVE + { + struct mg_str *conn_hdr = mg_get_http_header(hm, "Connection"); + if (conn_hdr != NULL) { + pd->file.keepalive = (mg_vcasecmp(conn_hdr, "keep-alive") == 0); + } else { + pd->file.keepalive = (mg_vcmp(&hm->proto, "HTTP/1.1") == 0); + } + } +#endif + + mg_http_construct_etag(etag, sizeof(etag), &st); + mg_gmt_time_string(current_time, sizeof(current_time), &t); + mg_gmt_time_string(last_modified, sizeof(last_modified), &st.st_mtime); + /* + * Content length casted to size_t because: + * 1) that's the maximum buffer size anyway + * 2) ESP8266 RTOS SDK newlib vprintf cannot contain a 64bit arg at non-last + * position + * TODO(mkm): fix ESP8266 RTOS SDK + */ + mg_send_response_line_s(nc, status_code, extra_headers); + mg_printf(nc, + "Date: %s\r\n" + "Last-Modified: %s\r\n" + "Accept-Ranges: bytes\r\n" + "Content-Type: %.*s\r\n" + "Connection: %s\r\n" + "Content-Length: %" SIZE_T_FMT + "\r\n" + "%sEtag: %s\r\n\r\n", + current_time, last_modified, (int) mime_type.len, mime_type.p, + (pd->file.keepalive ? "keep-alive" : "close"), (size_t) cl, range, + etag); + + pd->file.cl = cl; + pd->file.type = DATA_FILE; + mg_http_transfer_file_data(nc); + } +} + +static void mg_http_serve_file2(struct mg_connection *nc, const char *path, + struct http_message *hm, + struct mg_serve_http_opts *opts) { +#if MG_ENABLE_HTTP_SSI + if (mg_match_prefix(opts->ssi_pattern, strlen(opts->ssi_pattern), path) > 0) { + mg_handle_ssi_request(nc, hm, path, opts); + return; + } +#endif + mg_http_serve_file(nc, hm, path, mg_get_mime_type(path, "text/plain", opts), + mg_mk_str(opts->extra_headers)); +} + +#endif + +int mg_url_decode(const char *src, int src_len, char *dst, int dst_len, + int is_form_url_encoded) { + int i, j, a, b; +#define HEXTOI(x) (isdigit(x) ? x - '0' : x - 'W') + + for (i = j = 0; i < src_len && j < dst_len - 1; i++, j++) { + if (src[i] == '%') { + if (i < src_len - 2 && isxdigit(*(const unsigned char *) (src + i + 1)) && + isxdigit(*(const unsigned char *) (src + i + 2))) { + a = tolower(*(const unsigned char *) (src + i + 1)); + b = tolower(*(const unsigned char *) (src + i + 2)); + dst[j] = (char) ((HEXTOI(a) << 4) | HEXTOI(b)); + i += 2; + } else { + return -1; + } + } else if (is_form_url_encoded && src[i] == '+') { + dst[j] = ' '; + } else { + dst[j] = src[i]; + } + } + + dst[j] = '\0'; /* Null-terminate the destination */ + + return i >= src_len ? j : -1; +} + +int mg_get_http_var(const struct mg_str *buf, const char *name, char *dst, + size_t dst_len) { + const char *p, *e, *s; + size_t name_len; + int len; + + /* + * According to the documentation function returns negative + * value in case of error. For debug purposes it returns: + * -1 - src is wrong (NUUL) + * -2 - dst is wrong (NULL) + * -3 - failed to decode url or dst is to small + * -4 - name does not exist + */ + if (dst == NULL || dst_len == 0) { + len = -2; + } else if (buf->p == NULL || name == NULL || buf->len == 0) { + len = -1; + dst[0] = '\0'; + } else { + name_len = strlen(name); + e = buf->p + buf->len; + len = -4; + dst[0] = '\0'; + + for (p = buf->p; p + name_len < e; p++) { + if ((p == buf->p || p[-1] == '&') && p[name_len] == '=' && + !mg_ncasecmp(name, p, name_len)) { + p += name_len + 1; + s = (const char *) memchr(p, '&', (size_t)(e - p)); + if (s == NULL) { + s = e; + } + len = mg_url_decode(p, (size_t)(s - p), dst, dst_len, 1); + /* -1 means: failed to decode or dst is too small */ + if (len == -1) { + len = -3; + } + break; + } + } + } + + return len; +} + +void mg_send_http_chunk(struct mg_connection *nc, const char *buf, size_t len) { + char chunk_size[50]; + int n; + + n = snprintf(chunk_size, sizeof(chunk_size), "%lX\r\n", (unsigned long) len); + mg_send(nc, chunk_size, n); + mg_send(nc, buf, len); + mg_send(nc, "\r\n", 2); +} + +void mg_printf_http_chunk(struct mg_connection *nc, const char *fmt, ...) { + char mem[MG_VPRINTF_BUFFER_SIZE], *buf = mem; + int len; + va_list ap; + + va_start(ap, fmt); + len = mg_avprintf(&buf, sizeof(mem), fmt, ap); + va_end(ap); + + if (len >= 0) { + mg_send_http_chunk(nc, buf, len); + } + + /* LCOV_EXCL_START */ + if (buf != mem && buf != NULL) { + MG_FREE(buf); + } + /* LCOV_EXCL_STOP */ +} + +void mg_printf_html_escape(struct mg_connection *nc, const char *fmt, ...) { + char mem[MG_VPRINTF_BUFFER_SIZE], *buf = mem; + int i, j, len; + va_list ap; + + va_start(ap, fmt); + len = mg_avprintf(&buf, sizeof(mem), fmt, ap); + va_end(ap); + + if (len >= 0) { + for (i = j = 0; i < len; i++) { + if (buf[i] == '<' || buf[i] == '>') { + mg_send(nc, buf + j, i - j); + mg_send(nc, buf[i] == '<' ? "<" : ">", 4); + j = i + 1; + } + } + mg_send(nc, buf + j, i - j); + } + + /* LCOV_EXCL_START */ + if (buf != mem && buf != NULL) { + MG_FREE(buf); + } + /* LCOV_EXCL_STOP */ +} + +int mg_http_parse_header(struct mg_str *hdr, const char *var_name, char *buf, + size_t buf_size) { + int ch = ' ', ch1 = ',', len = 0, n = strlen(var_name); + const char *p, *end = hdr ? hdr->p + hdr->len : NULL, *s = NULL; + + if (buf != NULL && buf_size > 0) buf[0] = '\0'; + if (hdr == NULL) return 0; + + /* Find where variable starts */ + for (s = hdr->p; s != NULL && s + n < end; s++) { + if ((s == hdr->p || s[-1] == ch || s[-1] == ch1 || s[-1] == ';') && + s[n] == '=' && !strncmp(s, var_name, n)) + break; + } + + if (s != NULL && &s[n + 1] < end) { + s += n + 1; + if (*s == '"' || *s == '\'') { + ch = ch1 = *s++; + } + p = s; + while (p < end && p[0] != ch && p[0] != ch1 && len < (int) buf_size) { + if (ch != ' ' && p[0] == '\\' && p[1] == ch) p++; + buf[len++] = *p++; + } + if (len >= (int) buf_size || (ch != ' ' && *p != ch)) { + len = 0; + } else { + if (len > 0 && s[len - 1] == ',') len--; + if (len > 0 && s[len - 1] == ';') len--; + buf[len] = '\0'; + } + } + + return len; +} + +int mg_get_http_basic_auth(struct http_message *hm, char *user, size_t user_len, + char *pass, size_t pass_len) { + struct mg_str *hdr = mg_get_http_header(hm, "Authorization"); + if (hdr == NULL) return -1; + return mg_parse_http_basic_auth(hdr, user, user_len, pass, pass_len); +} + +int mg_parse_http_basic_auth(struct mg_str *hdr, char *user, size_t user_len, + char *pass, size_t pass_len) { + char *buf = NULL; + char fmt[64]; + int res = 0; + + if (mg_strncmp(*hdr, mg_mk_str("Basic "), 6) != 0) return -1; + + buf = (char *) MG_MALLOC(hdr->len); + cs_base64_decode((unsigned char *) hdr->p + 6, hdr->len, buf, NULL); + + /* e.g. "%123[^:]:%321[^\n]" */ + snprintf(fmt, sizeof(fmt), "%%%" SIZE_T_FMT "[^:]:%%%" SIZE_T_FMT "[^\n]", + user_len - 1, pass_len - 1); + if (sscanf(buf, fmt, user, pass) == 0) { + res = -1; + } + + MG_FREE(buf); + return res; +} + +#if MG_ENABLE_FILESYSTEM +static int mg_is_file_hidden(const char *path, + const struct mg_serve_http_opts *opts, + int exclude_specials) { + const char *p1 = opts->per_directory_auth_file; + const char *p2 = opts->hidden_file_pattern; + + /* Strip directory path from the file name */ + const char *pdir = strrchr(path, DIRSEP); + if (pdir != NULL) { + path = pdir + 1; + } + + return (exclude_specials && (!strcmp(path, ".") || !strcmp(path, ".."))) || + (p1 != NULL && + mg_match_prefix(p1, strlen(p1), path) == (int) strlen(p1)) || + (p2 != NULL && mg_match_prefix(p2, strlen(p2), path) > 0); +} + +#if !MG_DISABLE_HTTP_DIGEST_AUTH + +#ifndef MG_EXT_MD5 +void mg_hash_md5_v(size_t num_msgs, const uint8_t *msgs[], + const size_t *msg_lens, uint8_t *digest) { + size_t i; + cs_md5_ctx md5_ctx; + cs_md5_init(&md5_ctx); + for (i = 0; i < num_msgs; i++) { + cs_md5_update(&md5_ctx, msgs[i], msg_lens[i]); + } + cs_md5_final(digest, &md5_ctx); +} +#else +extern void mg_hash_md5_v(size_t num_msgs, const uint8_t *msgs[], + const size_t *msg_lens, uint8_t *digest); +#endif + +void cs_md5(char buf[33], ...) { + unsigned char hash[16]; + const uint8_t *msgs[20], *p; + size_t msg_lens[20]; + size_t num_msgs = 0; + va_list ap; + + va_start(ap, buf); + while ((p = va_arg(ap, const unsigned char *) ) != NULL) { + msgs[num_msgs] = p; + msg_lens[num_msgs] = va_arg(ap, size_t); + num_msgs++; + } + va_end(ap); + + mg_hash_md5_v(num_msgs, msgs, msg_lens, hash); + cs_to_hex(buf, hash, sizeof(hash)); +} + +static void mg_mkmd5resp(const char *method, size_t method_len, const char *uri, + size_t uri_len, const char *ha1, size_t ha1_len, + const char *nonce, size_t nonce_len, const char *nc, + size_t nc_len, const char *cnonce, size_t cnonce_len, + const char *qop, size_t qop_len, char *resp) { + static const char colon[] = ":"; + static const size_t one = 1; + char ha2[33]; + cs_md5(ha2, method, method_len, colon, one, uri, uri_len, NULL); + cs_md5(resp, ha1, ha1_len, colon, one, nonce, nonce_len, colon, one, nc, + nc_len, colon, one, cnonce, cnonce_len, colon, one, qop, qop_len, + colon, one, ha2, sizeof(ha2) - 1, NULL); +} + +int mg_http_create_digest_auth_header(char *buf, size_t buf_len, + const char *method, const char *uri, + const char *auth_domain, const char *user, + const char *passwd) { + static const char colon[] = ":", qop[] = "auth"; + static const size_t one = 1; + char ha1[33], resp[33], cnonce[40]; + + snprintf(cnonce, sizeof(cnonce), "%x", (unsigned int) mg_time()); + cs_md5(ha1, user, (size_t) strlen(user), colon, one, auth_domain, + (size_t) strlen(auth_domain), colon, one, passwd, + (size_t) strlen(passwd), NULL); + mg_mkmd5resp(method, strlen(method), uri, strlen(uri), ha1, sizeof(ha1) - 1, + cnonce, strlen(cnonce), "1", one, cnonce, strlen(cnonce), qop, + sizeof(qop) - 1, resp); + return snprintf(buf, buf_len, + "Authorization: Digest username=\"%s\"," + "realm=\"%s\",uri=\"%s\",qop=%s,nc=1,cnonce=%s," + "nonce=%s,response=%s\r\n", + user, auth_domain, uri, qop, cnonce, cnonce, resp); +} + +/* + * Check for authentication timeout. + * Clients send time stamp encoded in nonce. Make sure it is not too old, + * to prevent replay attacks. + * Assumption: nonce is a hexadecimal number of seconds since 1970. + */ +static int mg_check_nonce(const char *nonce) { + unsigned long now = (unsigned long) mg_time(); + unsigned long val = (unsigned long) strtoul(nonce, NULL, 16); + return now < val || now - val < 3600; +} + +int mg_http_check_digest_auth(struct http_message *hm, const char *auth_domain, + FILE *fp) { + struct mg_str *hdr; + char username[50], cnonce[64], response[40], uri[200], qop[20], nc[20], + nonce[30]; + + /* Parse "Authorization:" header, fail fast on parse error */ + if (hm == NULL || fp == NULL || + (hdr = mg_get_http_header(hm, "Authorization")) == NULL || + mg_http_parse_header(hdr, "username", username, sizeof(username)) == 0 || + mg_http_parse_header(hdr, "cnonce", cnonce, sizeof(cnonce)) == 0 || + mg_http_parse_header(hdr, "response", response, sizeof(response)) == 0 || + mg_http_parse_header(hdr, "uri", uri, sizeof(uri)) == 0 || + mg_http_parse_header(hdr, "qop", qop, sizeof(qop)) == 0 || + mg_http_parse_header(hdr, "nc", nc, sizeof(nc)) == 0 || + mg_http_parse_header(hdr, "nonce", nonce, sizeof(nonce)) == 0 || + mg_check_nonce(nonce) == 0) { + return 0; + } + + /* NOTE(lsm): due to a bug in MSIE, we do not compare URIs */ + + return mg_check_digest_auth( + hm->method, + mg_mk_str_n( + hm->uri.p, + hm->uri.len + (hm->query_string.len ? hm->query_string.len + 1 : 0)), + mg_mk_str(username), mg_mk_str(cnonce), mg_mk_str(response), + mg_mk_str(qop), mg_mk_str(nc), mg_mk_str(nonce), mg_mk_str(auth_domain), + fp); +} + +int mg_check_digest_auth(struct mg_str method, struct mg_str uri, + struct mg_str username, struct mg_str cnonce, + struct mg_str response, struct mg_str qop, + struct mg_str nc, struct mg_str nonce, + struct mg_str auth_domain, FILE *fp) { + char buf[128], f_user[sizeof(buf)], f_ha1[sizeof(buf)], f_domain[sizeof(buf)]; + char expected_response[33]; + + /* + * Read passwords file line by line. If should have htdigest format, + * i.e. each line should be a colon-separated sequence: + * USER_NAME:DOMAIN_NAME:HA1_HASH_OF_USER_DOMAIN_AND_PASSWORD + */ + while (fgets(buf, sizeof(buf), fp) != NULL) { + if (sscanf(buf, "%[^:]:%[^:]:%s", f_user, f_domain, f_ha1) == 3 && + mg_vcmp(&username, f_user) == 0 && + mg_vcmp(&auth_domain, f_domain) == 0) { + /* Username and domain matched, check the password */ + mg_mkmd5resp(method.p, method.len, uri.p, uri.len, f_ha1, strlen(f_ha1), + nonce.p, nonce.len, nc.p, nc.len, cnonce.p, cnonce.len, + qop.p, qop.len, expected_response); + LOG(LL_DEBUG, + ("%.*s %s %.*s %s", (int) username.len, username.p, f_domain, + (int) response.len, response.p, expected_response)); + return mg_ncasecmp(response.p, expected_response, response.len) == 0; + } + } + + /* None of the entries in the passwords file matched - return failure */ + return 0; +} + +int mg_http_is_authorized(struct http_message *hm, struct mg_str path, + const char *domain, const char *passwords_file, + int flags) { + char buf[MG_MAX_PATH]; + const char *p; + FILE *fp; + int authorized = 1; + + if (domain != NULL && passwords_file != NULL) { + if (flags & MG_AUTH_FLAG_IS_GLOBAL_PASS_FILE) { + fp = mg_fopen(passwords_file, "r"); + } else if (flags & MG_AUTH_FLAG_IS_DIRECTORY) { + snprintf(buf, sizeof(buf), "%.*s%c%s", (int) path.len, path.p, DIRSEP, + passwords_file); + fp = mg_fopen(buf, "r"); + } else { + p = strrchr(path.p, DIRSEP); + if (p == NULL) p = path.p; + snprintf(buf, sizeof(buf), "%.*s%c%s", (int) (p - path.p), path.p, DIRSEP, + passwords_file); + fp = mg_fopen(buf, "r"); + } + + if (fp != NULL) { + authorized = mg_http_check_digest_auth(hm, domain, fp); + fclose(fp); + } else if (!(flags & MG_AUTH_FLAG_ALLOW_MISSING_FILE)) { + authorized = 0; + } + } + + LOG(LL_DEBUG, ("%.*s %s %x %d", (int) path.len, path.p, + passwords_file ? passwords_file : "", flags, authorized)); + return authorized; +} +#else +int mg_http_is_authorized(struct http_message *hm, const struct mg_str path, + const char *domain, const char *passwords_file, + int flags) { + (void) hm; + (void) path; + (void) domain; + (void) passwords_file; + (void) flags; + return 1; +} +#endif + +#if MG_ENABLE_DIRECTORY_LISTING +static void mg_escape(const char *src, char *dst, size_t dst_len) { + size_t n = 0; + while (*src != '\0' && n + 5 < dst_len) { + unsigned char ch = *(unsigned char *) src++; + if (ch == '<') { + n += snprintf(dst + n, dst_len - n, "%s", "<"); + } else { + dst[n++] = ch; + } + } + dst[n] = '\0'; +} + +static void mg_print_dir_entry(struct mg_connection *nc, const char *file_name, + cs_stat_t *stp) { + char size[64], mod[64], path[MG_MAX_PATH]; + int64_t fsize = stp->st_size; + int is_dir = S_ISDIR(stp->st_mode); + const char *slash = is_dir ? "/" : ""; + struct mg_str href; + + if (is_dir) { + snprintf(size, sizeof(size), "%s", "[DIRECTORY]"); + } else { + /* + * We use (double) cast below because MSVC 6 compiler cannot + * convert unsigned __int64 to double. + */ + if (fsize < 1024) { + snprintf(size, sizeof(size), "%d", (int) fsize); + } else if (fsize < 0x100000) { + snprintf(size, sizeof(size), "%.1fk", (double) fsize / 1024.0); + } else if (fsize < 0x40000000) { + snprintf(size, sizeof(size), "%.1fM", (double) fsize / 1048576); + } else { + snprintf(size, sizeof(size), "%.1fG", (double) fsize / 1073741824); + } + } + strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", localtime(&stp->st_mtime)); + mg_escape(file_name, path, sizeof(path)); + href = mg_url_encode(mg_mk_str(file_name)); + mg_printf_http_chunk(nc, + "<tr><td><a href=\"%s%s\">%s%s</a></td>" + "<td>%s</td><td name=%" INT64_FMT ">%s</td></tr>\n", + href.p, slash, path, slash, mod, is_dir ? -1 : fsize, + size); + free((void *) href.p); +} + +static void mg_scan_directory(struct mg_connection *nc, const char *dir, + const struct mg_serve_http_opts *opts, + void (*func)(struct mg_connection *, const char *, + cs_stat_t *)) { + char path[MG_MAX_PATH]; + cs_stat_t st; + struct dirent *dp; + DIR *dirp; + + LOG(LL_DEBUG, ("%p [%s]", nc, dir)); + if ((dirp = (opendir(dir))) != NULL) { + while ((dp = readdir(dirp)) != NULL) { + /* Do not show current dir and hidden files */ + if (mg_is_file_hidden((const char *) dp->d_name, opts, 1)) { + continue; + } + snprintf(path, sizeof(path), "%s/%s", dir, dp->d_name); + if (mg_stat(path, &st) == 0) { + func(nc, (const char *) dp->d_name, &st); + } + } + closedir(dirp); + } else { + LOG(LL_DEBUG, ("%p opendir(%s) -> %d", nc, dir, mg_get_errno())); + } +} + +static void mg_send_directory_listing(struct mg_connection *nc, const char *dir, + struct http_message *hm, + struct mg_serve_http_opts *opts) { + static const char *sort_js_code = + "<script>function srt(tb, sc, so, d) {" + "var tr = Array.prototype.slice.call(tb.rows, 0)," + "tr = tr.sort(function (a, b) { var c1 = a.cells[sc], c2 = b.cells[sc]," + "n1 = c1.getAttribute('name'), n2 = c2.getAttribute('name'), " + "t1 = a.cells[2].getAttribute('name'), " + "t2 = b.cells[2].getAttribute('name'); " + "return so * (t1 < 0 && t2 >= 0 ? -1 : t2 < 0 && t1 >= 0 ? 1 : " + "n1 ? parseInt(n2) - parseInt(n1) : " + "c1.textContent.trim().localeCompare(c2.textContent.trim())); });"; + static const char *sort_js_code2 = + "for (var i = 0; i < tr.length; i++) tb.appendChild(tr[i]); " + "if (!d) window.location.hash = ('sc=' + sc + '&so=' + so); " + "};" + "window.onload = function() {" + "var tb = document.getElementById('tb');" + "var m = /sc=([012]).so=(1|-1)/.exec(window.location.hash) || [0, 2, 1];" + "var sc = m[1], so = m[2]; document.onclick = function(ev) { " + "var c = ev.target.rel; if (c) {if (c == sc) so *= -1; srt(tb, c, so); " + "sc = c; ev.preventDefault();}};" + "srt(tb, sc, so, true);" + "}" + "</script>"; + + mg_send_response_line(nc, 200, opts->extra_headers); + mg_printf(nc, "%s: %s\r\n%s: %s\r\n\r\n", "Transfer-Encoding", "chunked", + "Content-Type", "text/html; charset=utf-8"); + + mg_printf_http_chunk( + nc, + "<html><head><title>Index of %.*s</title>%s%s" + "<style>th,td {text-align: left; padding-right: 1em; " + "font-family: monospace; }</style></head>\n" + "<body><h1>Index of %.*s</h1>\n<table cellpadding=0><thead>" + "<tr><th><a href=# rel=0>Name</a></th><th>" + "<a href=# rel=1>Modified</a</th>" + "<th><a href=# rel=2>Size</a></th></tr>" + "<tr><td colspan=3><hr></td></tr>\n" + "</thead>\n" + "<tbody id=tb>", + (int) hm->uri.len, hm->uri.p, sort_js_code, sort_js_code2, + (int) hm->uri.len, hm->uri.p); + mg_scan_directory(nc, dir, opts, mg_print_dir_entry); + mg_printf_http_chunk(nc, + "</tbody><tr><td colspan=3><hr></td></tr>\n" + "</table>\n" + "<address>%s</address>\n" + "</body></html>", + mg_version_header); + mg_send_http_chunk(nc, "", 0); + /* TODO(rojer): Remove when cesanta/dev/issues/197 is fixed. */ + nc->flags |= MG_F_SEND_AND_CLOSE; +} +#endif /* MG_ENABLE_DIRECTORY_LISTING */ + +/* + * Given a directory path, find one of the files specified in the + * comma-separated list of index files `list`. + * First found index file wins. If an index file is found, then gets + * appended to the `path`, stat-ed, and result of `stat()` passed to `stp`. + * If index file is not found, then `path` and `stp` remain unchanged. + */ +MG_INTERNAL void mg_find_index_file(const char *path, const char *list, + char **index_file, cs_stat_t *stp) { + struct mg_str vec; + size_t path_len = strlen(path); + int found = 0; + *index_file = NULL; + + /* Traverse index files list. For each entry, append it to the given */ + /* path and see if the file exists. If it exists, break the loop */ + while ((list = mg_next_comma_list_entry(list, &vec, NULL)) != NULL) { + cs_stat_t st; + size_t len = path_len + 1 + vec.len + 1; + *index_file = (char *) MG_REALLOC(*index_file, len); + if (*index_file == NULL) break; + snprintf(*index_file, len, "%s%c%.*s", path, DIRSEP, (int) vec.len, vec.p); + + /* Does it exist? Is it a file? */ + if (mg_stat(*index_file, &st) == 0 && S_ISREG(st.st_mode)) { + /* Yes it does, break the loop */ + *stp = st; + found = 1; + break; + } + } + if (!found) { + MG_FREE(*index_file); + *index_file = NULL; + } + LOG(LL_DEBUG, ("[%s] [%s]", path, (*index_file ? *index_file : ""))); +} + +#if MG_ENABLE_HTTP_URL_REWRITES +static int mg_http_send_port_based_redirect( + struct mg_connection *c, struct http_message *hm, + const struct mg_serve_http_opts *opts) { + const char *rewrites = opts->url_rewrites; + struct mg_str a, b; + char local_port[20] = {'%'}; + + mg_conn_addr_to_str(c, local_port + 1, sizeof(local_port) - 1, + MG_SOCK_STRINGIFY_PORT); + + while ((rewrites = mg_next_comma_list_entry(rewrites, &a, &b)) != NULL) { + if (mg_vcmp(&a, local_port) == 0) { + mg_send_response_line(c, 301, NULL); + mg_printf(c, "Content-Length: 0\r\nLocation: %.*s%.*s\r\n\r\n", + (int) b.len, b.p, (int) (hm->proto.p - hm->uri.p - 1), + hm->uri.p); + return 1; + } + } + + return 0; +} + +static void mg_reverse_proxy_handler(struct mg_connection *nc, int ev, + void *ev_data MG_UD_ARG(void *user_data)) { + struct http_message *hm = (struct http_message *) ev_data; + struct mg_http_proto_data *pd = mg_http_get_proto_data(nc); + + if (pd == NULL || pd->reverse_proxy_data.linked_conn == NULL) { + DBG(("%p: upstream closed", nc)); + return; + } + + switch (ev) { + case MG_EV_CONNECT: + if (*(int *) ev_data != 0) { + mg_http_send_error(pd->reverse_proxy_data.linked_conn, 502, NULL); + } + break; + /* TODO(mkm): handle streaming */ + case MG_EV_HTTP_REPLY: + mg_send(pd->reverse_proxy_data.linked_conn, hm->message.p, + hm->message.len); + pd->reverse_proxy_data.linked_conn->flags |= MG_F_SEND_AND_CLOSE; + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + break; + case MG_EV_CLOSE: + pd->reverse_proxy_data.linked_conn->flags |= MG_F_SEND_AND_CLOSE; + break; + } + +#if MG_ENABLE_CALLBACK_USERDATA + (void) user_data; +#endif +} + +void mg_http_reverse_proxy(struct mg_connection *nc, + const struct http_message *hm, struct mg_str mount, + struct mg_str upstream) { + struct mg_connection *be; + char burl[256], *purl = burl; + int i; + const char *error; + struct mg_connect_opts opts; + struct mg_str path = MG_NULL_STR, user_info = MG_NULL_STR, host = MG_NULL_STR; + memset(&opts, 0, sizeof(opts)); + opts.error_string = &error; + + mg_asprintf(&purl, sizeof(burl), "%.*s%.*s", (int) upstream.len, upstream.p, + (int) (hm->uri.len - mount.len), hm->uri.p + mount.len); + + be = mg_connect_http_base(nc->mgr, MG_CB(mg_reverse_proxy_handler, NULL), + opts, "http", NULL, "https", NULL, purl, &path, + &user_info, &host); + LOG(LL_DEBUG, ("Proxying %.*s to %s (rule: %.*s)", (int) hm->uri.len, + hm->uri.p, purl, (int) mount.len, mount.p)); + + if (be == NULL) { + LOG(LL_ERROR, ("Error connecting to %s: %s", purl, error)); + mg_http_send_error(nc, 502, NULL); + goto cleanup; + } + + /* link connections to each other, they must live and die together */ + mg_http_get_proto_data(be)->reverse_proxy_data.linked_conn = nc; + mg_http_get_proto_data(nc)->reverse_proxy_data.linked_conn = be; + + /* send request upstream */ + mg_printf(be, "%.*s %.*s HTTP/1.1\r\n", (int) hm->method.len, hm->method.p, + (int) path.len, path.p); + + mg_printf(be, "Host: %.*s\r\n", (int) host.len, host.p); + for (i = 0; i < MG_MAX_HTTP_HEADERS && hm->header_names[i].len > 0; i++) { + struct mg_str hn = hm->header_names[i]; + struct mg_str hv = hm->header_values[i]; + + /* we rewrite the host header */ + if (mg_vcasecmp(&hn, "Host") == 0) continue; + /* + * Don't pass chunked transfer encoding to the client because hm->body is + * already dechunked when we arrive here. + */ + if (mg_vcasecmp(&hn, "Transfer-encoding") == 0 && + mg_vcasecmp(&hv, "chunked") == 0) { + mg_printf(be, "Content-Length: %" SIZE_T_FMT "\r\n", hm->body.len); + continue; + } + /* We don't support proxying Expect: 100-continue. */ + if (mg_vcasecmp(&hn, "Expect") == 0 && + mg_vcasecmp(&hv, "100-continue") == 0) { + continue; + } + + mg_printf(be, "%.*s: %.*s\r\n", (int) hn.len, hn.p, (int) hv.len, hv.p); + } + + mg_send(be, "\r\n", 2); + mg_send(be, hm->body.p, hm->body.len); + +cleanup: + if (purl != burl) MG_FREE(purl); +} + +static int mg_http_handle_forwarding(struct mg_connection *nc, + struct http_message *hm, + const struct mg_serve_http_opts *opts) { + const char *rewrites = opts->url_rewrites; + struct mg_str a, b; + struct mg_str p1 = MG_MK_STR("http://"), p2 = MG_MK_STR("https://"); + + while ((rewrites = mg_next_comma_list_entry(rewrites, &a, &b)) != NULL) { + if (mg_strncmp(a, hm->uri, a.len) == 0) { + if (mg_strncmp(b, p1, p1.len) == 0 || mg_strncmp(b, p2, p2.len) == 0) { + mg_http_reverse_proxy(nc, hm, a, b); + return 1; + } + } + } + + return 0; +} +#endif /* MG_ENABLE_FILESYSTEM */ + +MG_INTERNAL int mg_uri_to_local_path(struct http_message *hm, + const struct mg_serve_http_opts *opts, + char **local_path, + struct mg_str *remainder) { + int ok = 1; + const char *cp = hm->uri.p, *cp_end = hm->uri.p + hm->uri.len; + struct mg_str root = {NULL, 0}; + const char *file_uri_start = cp; + *local_path = NULL; + remainder->p = NULL; + remainder->len = 0; + + { /* 1. Determine which root to use. */ + +#if MG_ENABLE_HTTP_URL_REWRITES + const char *rewrites = opts->url_rewrites; +#else + const char *rewrites = ""; +#endif + struct mg_str *hh = mg_get_http_header(hm, "Host"); + struct mg_str a, b; + /* Check rewrites first. */ + while ((rewrites = mg_next_comma_list_entry(rewrites, &a, &b)) != NULL) { + if (a.len > 1 && a.p[0] == '@') { + /* Host rewrite. */ + if (hh != NULL && hh->len == a.len - 1 && + mg_ncasecmp(a.p + 1, hh->p, a.len - 1) == 0) { + root = b; + break; + } + } else { + /* Regular rewrite, URI=directory */ + int match_len = mg_match_prefix_n(a, hm->uri); + if (match_len > 0) { + file_uri_start = hm->uri.p + match_len; + if (*file_uri_start == '/' || file_uri_start == cp_end) { + /* Match ended at component boundary, ok. */ + } else if (*(file_uri_start - 1) == '/') { + /* Pattern ends with '/', backtrack. */ + file_uri_start--; + } else { + /* No match: must fall on the component boundary. */ + continue; + } + root = b; + break; + } + } + } + /* If no rewrite rules matched, use DAV or regular document root. */ + if (root.p == NULL) { +#if MG_ENABLE_HTTP_WEBDAV + if (opts->dav_document_root != NULL && mg_is_dav_request(&hm->method)) { + root.p = opts->dav_document_root; + root.len = strlen(opts->dav_document_root); + } else +#endif + { + root.p = opts->document_root; + root.len = strlen(opts->document_root); + } + } + assert(root.p != NULL && root.len > 0); + } + + { /* 2. Find where in the canonical URI path the local path ends. */ + const char *u = file_uri_start + 1; + char *lp = (char *) MG_MALLOC(root.len + hm->uri.len + 1); + char *lp_end = lp + root.len + hm->uri.len + 1; + char *p = lp, *ps; + int exists = 1; + if (lp == NULL) { + ok = 0; + goto out; + } + memcpy(p, root.p, root.len); + p += root.len; + if (*(p - 1) == DIRSEP) p--; + *p = '\0'; + ps = p; + + /* Chop off URI path components one by one and build local path. */ + while (u <= cp_end) { + const char *next = u; + struct mg_str component; + if (exists) { + cs_stat_t st; + exists = (mg_stat(lp, &st) == 0); + if (exists && S_ISREG(st.st_mode)) { + /* We found the terminal, the rest of the URI (if any) is path_info. + */ + if (*(u - 1) == '/') u--; + break; + } + } + if (u >= cp_end) break; + parse_uri_component((const char **) &next, cp_end, "/", &component); + if (component.len > 0) { + int len; + memmove(p + 1, component.p, component.len); + len = mg_url_decode(p + 1, component.len, p + 1, lp_end - p - 1, 0); + if (len <= 0) { + ok = 0; + break; + } + component.p = p + 1; + component.len = len; + if (mg_vcmp(&component, ".") == 0) { + /* Yum. */ + } else if (mg_vcmp(&component, "..") == 0) { + while (p > ps && *p != DIRSEP) p--; + *p = '\0'; + } else { + size_t i; +#ifdef _WIN32 + /* On Windows, make sure it's valid Unicode (no funny stuff). */ + wchar_t buf[MG_MAX_PATH * 2]; + if (to_wchar(component.p, buf, MG_MAX_PATH) == 0) { + DBG(("[%.*s] smells funny", (int) component.len, component.p)); + ok = 0; + break; + } +#endif + *p++ = DIRSEP; + /* No NULs and DIRSEPs in the component (percent-encoded). */ + for (i = 0; i < component.len; i++, p++) { + if (*p == '\0' || *p == DIRSEP +#ifdef _WIN32 + /* On Windows, "/" is also accepted, so check for that too. */ + || + *p == '/' +#endif + ) { + ok = 0; + break; + } + } + } + } + u = next; + } + if (ok) { + *local_path = lp; + if (u > cp_end) u = cp_end; + remainder->p = u; + remainder->len = cp_end - u; + } else { + MG_FREE(lp); + } + } + +out: + LOG(LL_DEBUG, + ("'%.*s' -> '%s' + '%.*s'", (int) hm->uri.len, hm->uri.p, + *local_path ? *local_path : "", (int) remainder->len, remainder->p)); + return ok; +} + +static int mg_get_month_index(const char *s) { + static const char *month_names[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", + "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"}; + size_t i; + + for (i = 0; i < ARRAY_SIZE(month_names); i++) + if (!strcmp(s, month_names[i])) return (int) i; + + return -1; +} + +static int mg_num_leap_years(int year) { + return year / 4 - year / 100 + year / 400; +} + +/* Parse UTC date-time string, and return the corresponding time_t value. */ +MG_INTERNAL time_t mg_parse_date_string(const char *datetime) { + static const unsigned short days_before_month[] = { + 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334}; + char month_str[32]; + int second, minute, hour, day, month, year, leap_days, days; + time_t result = (time_t) 0; + + if (((sscanf(datetime, "%d/%3s/%d %d:%d:%d", &day, month_str, &year, &hour, + &minute, &second) == 6) || + (sscanf(datetime, "%d %3s %d %d:%d:%d", &day, month_str, &year, &hour, + &minute, &second) == 6) || + (sscanf(datetime, "%*3s, %d %3s %d %d:%d:%d", &day, month_str, &year, + &hour, &minute, &second) == 6) || + (sscanf(datetime, "%d-%3s-%d %d:%d:%d", &day, month_str, &year, &hour, + &minute, &second) == 6)) && + year > 1970 && (month = mg_get_month_index(month_str)) != -1) { + leap_days = mg_num_leap_years(year) - mg_num_leap_years(1970); + year -= 1970; + days = year * 365 + days_before_month[month] + (day - 1) + leap_days; + result = days * 24 * 3600 + hour * 3600 + minute * 60 + second; + } + + return result; +} + +MG_INTERNAL int mg_is_not_modified(struct http_message *hm, cs_stat_t *st) { + struct mg_str *hdr; + if ((hdr = mg_get_http_header(hm, "If-None-Match")) != NULL) { + char etag[64]; + mg_http_construct_etag(etag, sizeof(etag), st); + return mg_vcasecmp(hdr, etag) == 0; + } else if ((hdr = mg_get_http_header(hm, "If-Modified-Since")) != NULL) { + return st->st_mtime <= mg_parse_date_string(hdr->p); + } else { + return 0; + } +} + +void mg_http_send_digest_auth_request(struct mg_connection *c, + const char *domain) { + mg_printf(c, + "HTTP/1.1 401 Unauthorized\r\n" + "WWW-Authenticate: Digest qop=\"auth\", " + "realm=\"%s\", nonce=\"%lu\"\r\n" + "Content-Length: 0\r\n\r\n", + domain, (unsigned long) mg_time()); +} + +static void mg_http_send_options(struct mg_connection *nc) { + mg_printf(nc, "%s", + "HTTP/1.1 200 OK\r\nAllow: GET, POST, HEAD, CONNECT, OPTIONS" +#if MG_ENABLE_HTTP_WEBDAV + ", MKCOL, PUT, DELETE, PROPFIND, MOVE\r\nDAV: 1,2" +#endif + "\r\n\r\n"); + nc->flags |= MG_F_SEND_AND_CLOSE; +} + +static int mg_is_creation_request(const struct http_message *hm) { + return mg_vcmp(&hm->method, "MKCOL") == 0 || mg_vcmp(&hm->method, "PUT") == 0; +} + +MG_INTERNAL void mg_send_http_file(struct mg_connection *nc, char *path, + const struct mg_str *path_info, + struct http_message *hm, + struct mg_serve_http_opts *opts) { + int exists, is_directory, is_cgi; +#if MG_ENABLE_HTTP_WEBDAV + int is_dav = mg_is_dav_request(&hm->method); +#else + int is_dav = 0; +#endif + char *index_file = NULL; + cs_stat_t st; + + exists = (mg_stat(path, &st) == 0); + is_directory = exists && S_ISDIR(st.st_mode); + + if (is_directory) + mg_find_index_file(path, opts->index_files, &index_file, &st); + + is_cgi = + (mg_match_prefix(opts->cgi_file_pattern, strlen(opts->cgi_file_pattern), + index_file ? index_file : path) > 0); + + LOG(LL_DEBUG, + ("%p %.*s [%s] exists=%d is_dir=%d is_dav=%d is_cgi=%d index=%s", nc, + (int) hm->method.len, hm->method.p, path, exists, is_directory, is_dav, + is_cgi, index_file ? index_file : "")); + + if (is_directory && hm->uri.p[hm->uri.len - 1] != '/' && !is_dav) { + mg_printf(nc, + "HTTP/1.1 301 Moved\r\nLocation: %.*s/\r\n" + "Content-Length: 0\r\n\r\n", + (int) hm->uri.len, hm->uri.p); + MG_FREE(index_file); + return; + } + + /* If we have path_info, the only way to handle it is CGI. */ + if (path_info->len > 0 && !is_cgi) { + mg_http_send_error(nc, 501, NULL); + MG_FREE(index_file); + return; + } + + if (is_dav && opts->dav_document_root == NULL) { + mg_http_send_error(nc, 501, NULL); + } else if (!mg_http_is_authorized( + hm, mg_mk_str(path), opts->auth_domain, opts->global_auth_file, + ((is_directory ? MG_AUTH_FLAG_IS_DIRECTORY : 0) | + MG_AUTH_FLAG_IS_GLOBAL_PASS_FILE | + MG_AUTH_FLAG_ALLOW_MISSING_FILE)) || + !mg_http_is_authorized( + hm, mg_mk_str(path), opts->auth_domain, + opts->per_directory_auth_file, + ((is_directory ? MG_AUTH_FLAG_IS_DIRECTORY : 0) | + MG_AUTH_FLAG_ALLOW_MISSING_FILE))) { + mg_http_send_digest_auth_request(nc, opts->auth_domain); + } else if (is_cgi) { +#if MG_ENABLE_HTTP_CGI + mg_handle_cgi(nc, index_file ? index_file : path, path_info, hm, opts); +#else + mg_http_send_error(nc, 501, NULL); +#endif /* MG_ENABLE_HTTP_CGI */ + } else if ((!exists || + mg_is_file_hidden(path, opts, 0 /* specials are ok */)) && + !mg_is_creation_request(hm)) { + mg_http_send_error(nc, 404, NULL); +#if MG_ENABLE_HTTP_WEBDAV + } else if (!mg_vcmp(&hm->method, "PROPFIND")) { + mg_handle_propfind(nc, path, &st, hm, opts); +#if !MG_DISABLE_DAV_AUTH + } else if (is_dav && + (opts->dav_auth_file == NULL || + (strcmp(opts->dav_auth_file, "-") != 0 && + !mg_http_is_authorized( + hm, mg_mk_str(path), opts->auth_domain, opts->dav_auth_file, + ((is_directory ? MG_AUTH_FLAG_IS_DIRECTORY : 0) | + MG_AUTH_FLAG_IS_GLOBAL_PASS_FILE | + MG_AUTH_FLAG_ALLOW_MISSING_FILE))))) { + mg_http_send_digest_auth_request(nc, opts->auth_domain); +#endif + } else if (!mg_vcmp(&hm->method, "MKCOL")) { + mg_handle_mkcol(nc, path, hm); + } else if (!mg_vcmp(&hm->method, "DELETE")) { + mg_handle_delete(nc, opts, path); + } else if (!mg_vcmp(&hm->method, "PUT")) { + mg_handle_put(nc, path, hm); + } else if (!mg_vcmp(&hm->method, "MOVE")) { + mg_handle_move(nc, opts, path, hm); +#if MG_ENABLE_FAKE_DAVLOCK + } else if (!mg_vcmp(&hm->method, "LOCK")) { + mg_handle_lock(nc, path); +#endif +#endif /* MG_ENABLE_HTTP_WEBDAV */ + } else if (!mg_vcmp(&hm->method, "OPTIONS")) { + mg_http_send_options(nc); + } else if (is_directory && index_file == NULL) { +#if MG_ENABLE_DIRECTORY_LISTING + if (strcmp(opts->enable_directory_listing, "yes") == 0) { + mg_send_directory_listing(nc, path, hm, opts); + } else { + mg_http_send_error(nc, 403, NULL); + } +#else + mg_http_send_error(nc, 501, NULL); +#endif + } else if (mg_is_not_modified(hm, &st)) { + mg_http_send_error(nc, 304, "Not Modified"); + } else { + mg_http_serve_file2(nc, index_file ? index_file : path, hm, opts); + } + MG_FREE(index_file); +} + +void mg_serve_http(struct mg_connection *nc, struct http_message *hm, + struct mg_serve_http_opts opts) { + char *path = NULL; + struct mg_str *hdr, path_info; + uint32_t remote_ip = ntohl(*(uint32_t *) &nc->sa.sin.sin_addr); + + if (mg_check_ip_acl(opts.ip_acl, remote_ip) != 1) { + /* Not allowed to connect */ + mg_http_send_error(nc, 403, NULL); + nc->flags |= MG_F_SEND_AND_CLOSE; + return; + } + +#if MG_ENABLE_HTTP_URL_REWRITES + if (mg_http_handle_forwarding(nc, hm, &opts)) { + return; + } + + if (mg_http_send_port_based_redirect(nc, hm, &opts)) { + return; + } +#endif + + if (opts.document_root == NULL) { + opts.document_root = "."; + } + if (opts.per_directory_auth_file == NULL) { + opts.per_directory_auth_file = ".htpasswd"; + } + if (opts.enable_directory_listing == NULL) { + opts.enable_directory_listing = "yes"; + } + if (opts.cgi_file_pattern == NULL) { + opts.cgi_file_pattern = "**.cgi$|**.php$"; + } + if (opts.ssi_pattern == NULL) { + opts.ssi_pattern = "**.shtml$|**.shtm$"; + } + if (opts.index_files == NULL) { + opts.index_files = "index.html,index.htm,index.shtml,index.cgi,index.php"; + } + /* Normalize path - resolve "." and ".." (in-place). */ + if (!mg_normalize_uri_path(&hm->uri, &hm->uri)) { + mg_http_send_error(nc, 400, NULL); + return; + } + if (mg_uri_to_local_path(hm, &opts, &path, &path_info) == 0) { + mg_http_send_error(nc, 404, NULL); + return; + } + mg_send_http_file(nc, path, &path_info, hm, &opts); + + MG_FREE(path); + path = NULL; + + /* Close connection for non-keep-alive requests */ + if (mg_vcmp(&hm->proto, "HTTP/1.1") != 0 || + ((hdr = mg_get_http_header(hm, "Connection")) != NULL && + mg_vcmp(hdr, "keep-alive") != 0)) { +#if 0 + nc->flags |= MG_F_SEND_AND_CLOSE; +#endif + } +} + +#if MG_ENABLE_HTTP_STREAMING_MULTIPART +void mg_file_upload_handler(struct mg_connection *nc, int ev, void *ev_data, + mg_fu_fname_fn local_name_fn + MG_UD_ARG(void *user_data)) { + switch (ev) { + case MG_EV_HTTP_PART_BEGIN: { + struct mg_http_multipart_part *mp = + (struct mg_http_multipart_part *) ev_data; + struct file_upload_state *fus = + (struct file_upload_state *) MG_CALLOC(1, sizeof(*fus)); + struct mg_str lfn = local_name_fn(nc, mg_mk_str(mp->file_name)); + mp->user_data = NULL; + if (lfn.p == NULL || lfn.len == 0) { + LOG(LL_ERROR, ("%p Not allowed to upload %s", nc, mp->file_name)); + mg_printf(nc, + "HTTP/1.1 403 Not Allowed\r\n" + "Content-Type: text/plain\r\n" + "Connection: close\r\n\r\n" + "Not allowed to upload %s\r\n", + mp->file_name); + nc->flags |= MG_F_SEND_AND_CLOSE; + return; + } + fus->lfn = (char *) MG_MALLOC(lfn.len + 1); + memcpy(fus->lfn, lfn.p, lfn.len); + fus->lfn[lfn.len] = '\0'; + if (lfn.p != mp->file_name) MG_FREE((char *) lfn.p); + LOG(LL_DEBUG, + ("%p Receiving file %s -> %s", nc, mp->file_name, fus->lfn)); + fus->fp = mg_fopen(fus->lfn, "w"); + if (fus->fp == NULL) { + mg_printf(nc, + "HTTP/1.1 500 Internal Server Error\r\n" + "Content-Type: text/plain\r\n" + "Connection: close\r\n\r\n"); + LOG(LL_ERROR, ("Failed to open %s: %d\n", fus->lfn, mg_get_errno())); + mg_printf(nc, "Failed to open %s: %d\n", fus->lfn, mg_get_errno()); + /* Do not close the connection just yet, discard remainder of the data. + * This is because at the time of writing some browsers (Chrome) fail to + * render response before all the data is sent. */ + } + mp->user_data = (void *) fus; + break; + } + case MG_EV_HTTP_PART_DATA: { + struct mg_http_multipart_part *mp = + (struct mg_http_multipart_part *) ev_data; + struct file_upload_state *fus = + (struct file_upload_state *) mp->user_data; + if (fus == NULL || fus->fp == NULL) break; + if (mg_fwrite(mp->data.p, 1, mp->data.len, fus->fp) != mp->data.len) { + LOG(LL_ERROR, ("Failed to write to %s: %d, wrote %d", fus->lfn, + mg_get_errno(), (int) fus->num_recd)); + if (mg_get_errno() == ENOSPC +#ifdef SPIFFS_ERR_FULL + || mg_get_errno() == SPIFFS_ERR_FULL +#endif + ) { + mg_printf(nc, + "HTTP/1.1 413 Payload Too Large\r\n" + "Content-Type: text/plain\r\n" + "Connection: close\r\n\r\n"); + mg_printf(nc, "Failed to write to %s: no space left; wrote %d\r\n", + fus->lfn, (int) fus->num_recd); + } else { + mg_printf(nc, + "HTTP/1.1 500 Internal Server Error\r\n" + "Content-Type: text/plain\r\n" + "Connection: close\r\n\r\n"); + mg_printf(nc, "Failed to write to %s: %d, wrote %d", mp->file_name, + mg_get_errno(), (int) fus->num_recd); + } + fclose(fus->fp); + remove(fus->lfn); + fus->fp = NULL; + /* Do not close the connection just yet, discard remainder of the data. + * This is because at the time of writing some browsers (Chrome) fail to + * render response before all the data is sent. */ + return; + } + fus->num_recd += mp->data.len; + LOG(LL_DEBUG, ("%p rec'd %d bytes, %d total", nc, (int) mp->data.len, + (int) fus->num_recd)); + break; + } + case MG_EV_HTTP_PART_END: { + struct mg_http_multipart_part *mp = + (struct mg_http_multipart_part *) ev_data; + struct file_upload_state *fus = + (struct file_upload_state *) mp->user_data; + if (fus == NULL) break; + if (mp->status >= 0 && fus->fp != NULL) { + LOG(LL_DEBUG, ("%p Uploaded %s (%s), %d bytes", nc, mp->file_name, + fus->lfn, (int) fus->num_recd)); + mg_printf(nc, + "HTTP/1.1 200 OK\r\n" + "Content-Type: text/plain\r\n" + "Connection: close\r\n\r\n" + "Ok, %s - %d bytes.\r\n", + mp->file_name, (int) fus->num_recd); + } else { + LOG(LL_ERROR, ("Failed to store %s (%s)", mp->file_name, fus->lfn)); + /* + * mp->status < 0 means connection was terminated, so no reason to send + * HTTP reply + */ + } + if (fus->fp != NULL) fclose(fus->fp); + MG_FREE(fus->lfn); + MG_FREE(fus); + mp->user_data = NULL; + nc->flags |= MG_F_SEND_AND_CLOSE; + break; + } + } + +#if MG_ENABLE_CALLBACK_USERDATA + (void) user_data; +#endif +} + +#endif /* MG_ENABLE_HTTP_STREAMING_MULTIPART */ +#endif /* MG_ENABLE_FILESYSTEM */ + +struct mg_connection *mg_connect_http_base( + struct mg_mgr *mgr, MG_CB(mg_event_handler_t ev_handler, void *user_data), + struct mg_connect_opts opts, const char *scheme1, const char *scheme2, + const char *scheme_ssl1, const char *scheme_ssl2, const char *url, + struct mg_str *path, struct mg_str *user_info, struct mg_str *host) { + struct mg_connection *nc = NULL; + unsigned int port_i = 0; + int use_ssl = 0; + struct mg_str scheme, query, fragment; + char conn_addr_buf[2]; + char *conn_addr = conn_addr_buf; + + if (mg_parse_uri(mg_mk_str(url), &scheme, user_info, host, &port_i, path, + &query, &fragment) != 0) { + MG_SET_PTRPTR(opts.error_string, "cannot parse url"); + goto out; + } + + /* If query is present, do not strip it. Pass to the caller. */ + if (query.len > 0) path->len += query.len + 1; + + if (scheme.len == 0 || mg_vcmp(&scheme, scheme1) == 0 || + (scheme2 != NULL && mg_vcmp(&scheme, scheme2) == 0)) { + use_ssl = 0; + if (port_i == 0) port_i = 80; + } else if (mg_vcmp(&scheme, scheme_ssl1) == 0 || + (scheme2 != NULL && mg_vcmp(&scheme, scheme_ssl2) == 0)) { + use_ssl = 1; + if (port_i == 0) port_i = 443; + } else { + goto out; + } + + mg_asprintf(&conn_addr, sizeof(conn_addr_buf), "tcp://%.*s:%u", + (int) host->len, host->p, port_i); + if (conn_addr == NULL) goto out; + + LOG(LL_DEBUG, ("%s use_ssl? %d %s", url, use_ssl, conn_addr)); + if (use_ssl) { +#if MG_ENABLE_SSL + /* + * Schema requires SSL, but no SSL parameters were provided in opts. + * In order to maintain backward compatibility, use a faux-SSL with no + * verification. + */ + if (opts.ssl_ca_cert == NULL) { + opts.ssl_ca_cert = "*"; + } +#else + MG_SET_PTRPTR(opts.error_string, "ssl is disabled"); + goto out; +#endif + } + + if ((nc = mg_connect_opt(mgr, conn_addr, MG_CB(ev_handler, user_data), + opts)) != NULL) { + mg_set_protocol_http_websocket(nc); + } + +out: + if (conn_addr != NULL && conn_addr != conn_addr_buf) MG_FREE(conn_addr); + return nc; +} + +struct mg_connection *mg_connect_http_opt( + struct mg_mgr *mgr, MG_CB(mg_event_handler_t ev_handler, void *user_data), + struct mg_connect_opts opts, const char *url, const char *extra_headers, + const char *post_data) { + struct mg_str user = MG_NULL_STR, null_str = MG_NULL_STR; + struct mg_str host = MG_NULL_STR, path = MG_NULL_STR; + struct mbuf auth; + struct mg_connection *nc = + mg_connect_http_base(mgr, MG_CB(ev_handler, user_data), opts, "http", + NULL, "https", NULL, url, &path, &user, &host); + + if (nc == NULL) { + return NULL; + } + + mbuf_init(&auth, 0); + if (user.len > 0) { + mg_basic_auth_header(user, null_str, &auth); + } + + if (post_data == NULL) post_data = ""; + if (extra_headers == NULL) extra_headers = ""; + if (path.len == 0) path = mg_mk_str("/"); + if (host.len == 0) host = mg_mk_str(""); + + mg_printf(nc, "%s %.*s HTTP/1.1\r\nHost: %.*s\r\nContent-Length: %" SIZE_T_FMT + "\r\n%.*s%s\r\n%s", + (post_data[0] == '\0' ? "GET" : "POST"), (int) path.len, path.p, + (int) (path.p - host.p), host.p, strlen(post_data), (int) auth.len, + (auth.buf == NULL ? "" : auth.buf), extra_headers, post_data); + + mbuf_free(&auth); + return nc; +} + +struct mg_connection *mg_connect_http( + struct mg_mgr *mgr, MG_CB(mg_event_handler_t ev_handler, void *user_data), + const char *url, const char *extra_headers, const char *post_data) { + struct mg_connect_opts opts; + memset(&opts, 0, sizeof(opts)); + return mg_connect_http_opt(mgr, MG_CB(ev_handler, user_data), opts, url, + extra_headers, post_data); +} + +size_t mg_parse_multipart(const char *buf, size_t buf_len, char *var_name, + size_t var_name_len, char *file_name, + size_t file_name_len, const char **data, + size_t *data_len) { + static const char cd[] = "Content-Disposition: "; + size_t hl, bl, n, ll, pos, cdl = sizeof(cd) - 1; + + if (buf == NULL || buf_len <= 0) return 0; + if ((hl = mg_http_get_request_len(buf, buf_len)) <= 0) return 0; + if (buf[0] != '-' || buf[1] != '-' || buf[2] == '\n') return 0; + + /* Get boundary length */ + bl = mg_get_line_len(buf, buf_len); + + /* Loop through headers, fetch variable name and file name */ + var_name[0] = file_name[0] = '\0'; + for (n = bl; (ll = mg_get_line_len(buf + n, hl - n)) > 0; n += ll) { + if (mg_ncasecmp(cd, buf + n, cdl) == 0) { + struct mg_str header; + header.p = buf + n + cdl; + header.len = ll - (cdl + 2); + mg_http_parse_header(&header, "name", var_name, var_name_len); + mg_http_parse_header(&header, "filename", file_name, file_name_len); + } + } + + /* Scan through the body, search for terminating boundary */ + for (pos = hl; pos + (bl - 2) < buf_len; pos++) { + if (buf[pos] == '-' && !strncmp(buf, &buf[pos], bl - 2)) { + if (data_len != NULL) *data_len = (pos - 2) - hl; + if (data != NULL) *data = buf + hl; + return pos; + } + } + + return 0; +} + +void mg_register_http_endpoint_opt(struct mg_connection *nc, + const char *uri_path, + mg_event_handler_t handler, + struct mg_http_endpoint_opts opts) { + struct mg_http_proto_data *pd = NULL; + struct mg_http_endpoint *new_ep = NULL; + + if (nc == NULL) return; + new_ep = (struct mg_http_endpoint *) MG_CALLOC(1, sizeof(*new_ep)); + if (new_ep == NULL) return; + + pd = mg_http_get_proto_data(nc); + new_ep->uri_pattern = mg_strdup(mg_mk_str(uri_path)); + if (opts.auth_domain != NULL && opts.auth_file != NULL) { + new_ep->auth_domain = strdup(opts.auth_domain); + new_ep->auth_file = strdup(opts.auth_file); + } + new_ep->handler = handler; +#if MG_ENABLE_CALLBACK_USERDATA + new_ep->user_data = opts.user_data; +#endif + new_ep->next = pd->endpoints; + pd->endpoints = new_ep; +} + +static void mg_http_call_endpoint_handler(struct mg_connection *nc, int ev, + struct http_message *hm) { + struct mg_http_proto_data *pd = mg_http_get_proto_data(nc); + void *user_data = nc->user_data; + + if (ev == MG_EV_HTTP_REQUEST +#if MG_ENABLE_HTTP_STREAMING_MULTIPART + || ev == MG_EV_HTTP_MULTIPART_REQUEST +#endif + ) { + struct mg_http_endpoint *ep = + mg_http_get_endpoint_handler(nc->listener, &hm->uri); + if (ep != NULL) { +#if MG_ENABLE_FILESYSTEM && !MG_DISABLE_HTTP_DIGEST_AUTH + if (!mg_http_is_authorized(hm, hm->uri, ep->auth_domain, ep->auth_file, + MG_AUTH_FLAG_IS_GLOBAL_PASS_FILE)) { + mg_http_send_digest_auth_request(nc, ep->auth_domain); + return; + } +#endif + pd->endpoint_handler = ep->handler; +#if MG_ENABLE_CALLBACK_USERDATA + user_data = ep->user_data; +#endif + } + } + mg_call(nc, pd->endpoint_handler ? pd->endpoint_handler : nc->handler, + user_data, ev, hm); +} + +void mg_register_http_endpoint(struct mg_connection *nc, const char *uri_path, + MG_CB(mg_event_handler_t handler, + void *user_data)) { + struct mg_http_endpoint_opts opts; + memset(&opts, 0, sizeof(opts)); +#if MG_ENABLE_CALLBACK_USERDATA + opts.user_data = user_data; +#endif + mg_register_http_endpoint_opt(nc, uri_path, handler, opts); +} + +#endif /* MG_ENABLE_HTTP */ +#ifdef MG_MODULE_LINES +#line 1 "mongoose/src/http_cgi.c" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +#ifndef _WIN32 +#include <signal.h> +#endif + +#if MG_ENABLE_HTTP && MG_ENABLE_HTTP_CGI + +#ifndef MG_MAX_CGI_ENVIR_VARS +#define MG_MAX_CGI_ENVIR_VARS 64 +#endif + +#ifndef MG_ENV_EXPORT_TO_CGI +#define MG_ENV_EXPORT_TO_CGI "MONGOOSE_CGI" +#endif + +#define MG_F_HTTP_CGI_PARSE_HEADERS MG_F_USER_1 + +/* + * This structure helps to create an environment for the spawned CGI program. + * Environment is an array of "VARIABLE=VALUE\0" ASCIIZ strings, + * last element must be NULL. + * However, on Windows there is a requirement that all these VARIABLE=VALUE\0 + * strings must reside in a contiguous buffer. The end of the buffer is + * marked by two '\0' characters. + * We satisfy both worlds: we create an envp array (which is vars), all + * entries are actually pointers inside buf. + */ +struct mg_cgi_env_block { + struct mg_connection *nc; + char buf[MG_CGI_ENVIRONMENT_SIZE]; /* Environment buffer */ + const char *vars[MG_MAX_CGI_ENVIR_VARS]; /* char *envp[] */ + int len; /* Space taken */ + int nvars; /* Number of variables in envp[] */ +}; + +#ifdef _WIN32 +struct mg_threadparam { + sock_t s; + HANDLE hPipe; +}; + +static int mg_wait_until_ready(sock_t sock, int for_read) { + fd_set set; + FD_ZERO(&set); + FD_SET(sock, &set); + return select(sock + 1, for_read ? &set : 0, for_read ? 0 : &set, 0, 0) == 1; +} + +static void *mg_push_to_stdin(void *arg) { + struct mg_threadparam *tp = (struct mg_threadparam *) arg; + int n, sent, stop = 0; + DWORD k; + char buf[BUFSIZ]; + + while (!stop && mg_wait_until_ready(tp->s, 1) && + (n = recv(tp->s, buf, sizeof(buf), 0)) > 0) { + if (n == -1 && GetLastError() == WSAEWOULDBLOCK) continue; + for (sent = 0; !stop && sent < n; sent += k) { + if (!WriteFile(tp->hPipe, buf + sent, n - sent, &k, 0)) stop = 1; + } + } + DBG(("%s", "FORWARED EVERYTHING TO CGI")); + CloseHandle(tp->hPipe); + MG_FREE(tp); + return NULL; +} + +static void *mg_pull_from_stdout(void *arg) { + struct mg_threadparam *tp = (struct mg_threadparam *) arg; + int k = 0, stop = 0; + DWORD n, sent; + char buf[BUFSIZ]; + + while (!stop && ReadFile(tp->hPipe, buf, sizeof(buf), &n, NULL)) { + for (sent = 0; !stop && sent < n; sent += k) { + if (mg_wait_until_ready(tp->s, 0) && + (k = send(tp->s, buf + sent, n - sent, 0)) <= 0) + stop = 1; + } + } + DBG(("%s", "EOF FROM CGI")); + CloseHandle(tp->hPipe); + shutdown(tp->s, 2); // Without this, IO thread may get truncated data + closesocket(tp->s); + MG_FREE(tp); + return NULL; +} + +static void mg_spawn_stdio_thread(sock_t sock, HANDLE hPipe, + void *(*func)(void *)) { + struct mg_threadparam *tp = (struct mg_threadparam *) MG_MALLOC(sizeof(*tp)); + if (tp != NULL) { + tp->s = sock; + tp->hPipe = hPipe; + mg_start_thread(func, tp); + } +} + +static void mg_abs_path(const char *utf8_path, char *abs_path, size_t len) { + wchar_t buf[MG_MAX_PATH], buf2[MG_MAX_PATH]; + to_wchar(utf8_path, buf, ARRAY_SIZE(buf)); + GetFullPathNameW(buf, ARRAY_SIZE(buf2), buf2, NULL); + WideCharToMultiByte(CP_UTF8, 0, buf2, wcslen(buf2) + 1, abs_path, len, 0, 0); +} + +static int mg_start_process(const char *interp, const char *cmd, + const char *env, const char *envp[], + const char *dir, sock_t sock) { + STARTUPINFOW si; + PROCESS_INFORMATION pi; + HANDLE a[2], b[2], me = GetCurrentProcess(); + wchar_t wcmd[MG_MAX_PATH], full_dir[MG_MAX_PATH]; + char buf[MG_MAX_PATH], buf2[MG_MAX_PATH], buf5[MG_MAX_PATH], + buf4[MG_MAX_PATH], cmdline[MG_MAX_PATH]; + DWORD flags = DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS; + FILE *fp; + + memset(&si, 0, sizeof(si)); + memset(&pi, 0, sizeof(pi)); + + si.cb = sizeof(si); + si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW; + si.wShowWindow = SW_HIDE; + si.hStdError = GetStdHandle(STD_ERROR_HANDLE); + + CreatePipe(&a[0], &a[1], NULL, 0); + CreatePipe(&b[0], &b[1], NULL, 0); + DuplicateHandle(me, a[0], me, &si.hStdInput, 0, TRUE, flags); + DuplicateHandle(me, b[1], me, &si.hStdOutput, 0, TRUE, flags); + + if (interp == NULL && (fp = mg_fopen(cmd, "r")) != NULL) { + buf[0] = buf[1] = '\0'; + fgets(buf, sizeof(buf), fp); + buf[sizeof(buf) - 1] = '\0'; + if (buf[0] == '#' && buf[1] == '!') { + interp = buf + 2; + /* Trim leading spaces: https://github.com/cesanta/mongoose/issues/489 */ + while (*interp != '\0' && isspace(*(unsigned char *) interp)) { + interp++; + } + } + fclose(fp); + } + + snprintf(buf, sizeof(buf), "%s/%s", dir, cmd); + mg_abs_path(buf, buf2, ARRAY_SIZE(buf2)); + + mg_abs_path(dir, buf5, ARRAY_SIZE(buf5)); + to_wchar(dir, full_dir, ARRAY_SIZE(full_dir)); + + if (interp != NULL) { + mg_abs_path(interp, buf4, ARRAY_SIZE(buf4)); + snprintf(cmdline, sizeof(cmdline), "%s \"%s\"", buf4, buf2); + } else { + snprintf(cmdline, sizeof(cmdline), "\"%s\"", buf2); + } + to_wchar(cmdline, wcmd, ARRAY_SIZE(wcmd)); + + if (CreateProcessW(NULL, wcmd, NULL, NULL, TRUE, CREATE_NEW_PROCESS_GROUP, + (void *) env, full_dir, &si, &pi) != 0) { + mg_spawn_stdio_thread(sock, a[1], mg_push_to_stdin); + mg_spawn_stdio_thread(sock, b[0], mg_pull_from_stdout); + + CloseHandle(si.hStdOutput); + CloseHandle(si.hStdInput); + + CloseHandle(pi.hThread); + CloseHandle(pi.hProcess); + } else { + CloseHandle(a[1]); + CloseHandle(b[0]); + closesocket(sock); + } + DBG(("CGI command: [%ls] -> %p", wcmd, pi.hProcess)); + + /* Not closing a[0] and b[1] because we've used DUPLICATE_CLOSE_SOURCE */ + (void) envp; + return (pi.hProcess != NULL); +} +#else +static int mg_start_process(const char *interp, const char *cmd, + const char *env, const char *envp[], + const char *dir, sock_t sock) { + char buf[500]; + pid_t pid = fork(); + (void) env; + + if (pid == 0) { + /* + * In Linux `chdir` declared with `warn_unused_result` attribute + * To shutup compiler we have yo use result in some way + */ + int tmp = chdir(dir); + (void) tmp; + (void) dup2(sock, 0); + (void) dup2(sock, 1); + closesocket(sock); + + /* + * After exec, all signal handlers are restored to their default values, + * with one exception of SIGCHLD. According to POSIX.1-2001 and Linux's + * implementation, SIGCHLD's handler will leave unchanged after exec + * if it was set to be ignored. Restore it to default action. + */ + signal(SIGCHLD, SIG_DFL); + + if (interp == NULL) { + execle(cmd, cmd, (char *) 0, envp); /* (char *) 0 to squash warning */ + } else { + execle(interp, interp, cmd, (char *) 0, envp); + } + snprintf(buf, sizeof(buf), + "Status: 500\r\n\r\n" + "500 Server Error: %s%s%s: %s", + interp == NULL ? "" : interp, interp == NULL ? "" : " ", cmd, + strerror(errno)); + send(1, buf, strlen(buf), 0); + _exit(EXIT_FAILURE); /* exec call failed */ + } + + return (pid != 0); +} +#endif /* _WIN32 */ + +/* + * Append VARIABLE=VALUE\0 string to the buffer, and add a respective + * pointer into the vars array. + */ +static char *mg_addenv(struct mg_cgi_env_block *block, const char *fmt, ...) { + int n, space; + char *added = block->buf + block->len; + va_list ap; + + /* Calculate how much space is left in the buffer */ + space = sizeof(block->buf) - (block->len + 2); + if (space > 0) { + /* Copy VARIABLE=VALUE\0 string into the free space */ + va_start(ap, fmt); + n = vsnprintf(added, (size_t) space, fmt, ap); + va_end(ap); + + /* Make sure we do not overflow buffer and the envp array */ + if (n > 0 && n + 1 < space && + block->nvars < (int) ARRAY_SIZE(block->vars) - 2) { + /* Append a pointer to the added string into the envp array */ + block->vars[block->nvars++] = added; + /* Bump up used length counter. Include \0 terminator */ + block->len += n + 1; + } + } + + return added; +} + +static void mg_addenv2(struct mg_cgi_env_block *blk, const char *name) { + const char *s; + if ((s = getenv(name)) != NULL) mg_addenv(blk, "%s=%s", name, s); +} + +static void mg_prepare_cgi_environment(struct mg_connection *nc, + const char *prog, + const struct mg_str *path_info, + const struct http_message *hm, + const struct mg_serve_http_opts *opts, + struct mg_cgi_env_block *blk) { + const char *s; + struct mg_str *h; + char *p; + size_t i; + char buf[100]; + + blk->len = blk->nvars = 0; + blk->nc = nc; + + if ((s = getenv("SERVER_NAME")) != NULL) { + mg_addenv(blk, "SERVER_NAME=%s", s); + } else { + mg_sock_to_str(nc->sock, buf, sizeof(buf), 3); + mg_addenv(blk, "SERVER_NAME=%s", buf); + } + mg_addenv(blk, "SERVER_ROOT=%s", opts->document_root); + mg_addenv(blk, "DOCUMENT_ROOT=%s", opts->document_root); + mg_addenv(blk, "SERVER_SOFTWARE=%s/%s", "Mongoose", MG_VERSION); + + /* Prepare the environment block */ + mg_addenv(blk, "%s", "GATEWAY_INTERFACE=CGI/1.1"); + mg_addenv(blk, "%s", "SERVER_PROTOCOL=HTTP/1.1"); + mg_addenv(blk, "%s", "REDIRECT_STATUS=200"); /* For PHP */ + + mg_addenv(blk, "REQUEST_METHOD=%.*s", (int) hm->method.len, hm->method.p); + + mg_addenv(blk, "REQUEST_URI=%.*s%s%.*s", (int) hm->uri.len, hm->uri.p, + hm->query_string.len == 0 ? "" : "?", (int) hm->query_string.len, + hm->query_string.p); + + mg_conn_addr_to_str(nc, buf, sizeof(buf), + MG_SOCK_STRINGIFY_REMOTE | MG_SOCK_STRINGIFY_IP); + mg_addenv(blk, "REMOTE_ADDR=%s", buf); + mg_conn_addr_to_str(nc, buf, sizeof(buf), MG_SOCK_STRINGIFY_PORT); + mg_addenv(blk, "SERVER_PORT=%s", buf); + + s = hm->uri.p + hm->uri.len - path_info->len - 1; + if (*s == '/') { + const char *base_name = strrchr(prog, DIRSEP); + mg_addenv(blk, "SCRIPT_NAME=%.*s/%s", (int) (s - hm->uri.p), hm->uri.p, + (base_name != NULL ? base_name + 1 : prog)); + } else { + mg_addenv(blk, "SCRIPT_NAME=%.*s", (int) (s - hm->uri.p + 1), hm->uri.p); + } + mg_addenv(blk, "SCRIPT_FILENAME=%s", prog); + + if (path_info != NULL && path_info->len > 0) { + mg_addenv(blk, "PATH_INFO=%.*s", (int) path_info->len, path_info->p); + /* Not really translated... */ + mg_addenv(blk, "PATH_TRANSLATED=%.*s", (int) path_info->len, path_info->p); + } + +#if MG_ENABLE_SSL + mg_addenv(blk, "HTTPS=%s", (nc->flags & MG_F_SSL ? "on" : "off")); +#else + mg_addenv(blk, "HTTPS=off"); +#endif + + if ((h = mg_get_http_header((struct http_message *) hm, "Content-Type")) != + NULL) { + mg_addenv(blk, "CONTENT_TYPE=%.*s", (int) h->len, h->p); + } + + if (hm->query_string.len > 0) { + mg_addenv(blk, "QUERY_STRING=%.*s", (int) hm->query_string.len, + hm->query_string.p); + } + + if ((h = mg_get_http_header((struct http_message *) hm, "Content-Length")) != + NULL) { + mg_addenv(blk, "CONTENT_LENGTH=%.*s", (int) h->len, h->p); + } + + mg_addenv2(blk, "PATH"); + mg_addenv2(blk, "TMP"); + mg_addenv2(blk, "TEMP"); + mg_addenv2(blk, "TMPDIR"); + mg_addenv2(blk, "PERLLIB"); + mg_addenv2(blk, MG_ENV_EXPORT_TO_CGI); + +#ifdef _WIN32 + mg_addenv2(blk, "COMSPEC"); + mg_addenv2(blk, "SYSTEMROOT"); + mg_addenv2(blk, "SystemDrive"); + mg_addenv2(blk, "ProgramFiles"); + mg_addenv2(blk, "ProgramFiles(x86)"); + mg_addenv2(blk, "CommonProgramFiles(x86)"); +#else + mg_addenv2(blk, "LD_LIBRARY_PATH"); +#endif /* _WIN32 */ + + /* Add all headers as HTTP_* variables */ + for (i = 0; hm->header_names[i].len > 0; i++) { + p = mg_addenv(blk, "HTTP_%.*s=%.*s", (int) hm->header_names[i].len, + hm->header_names[i].p, (int) hm->header_values[i].len, + hm->header_values[i].p); + + /* Convert variable name into uppercase, and change - to _ */ + for (; *p != '=' && *p != '\0'; p++) { + if (*p == '-') *p = '_'; + *p = (char) toupper(*(unsigned char *) p); + } + } + + blk->vars[blk->nvars++] = NULL; + blk->buf[blk->len++] = '\0'; +} + +static void mg_cgi_ev_handler(struct mg_connection *cgi_nc, int ev, + void *ev_data MG_UD_ARG(void *user_data)) { +#if !MG_ENABLE_CALLBACK_USERDATA + void *user_data = cgi_nc->user_data; +#endif + struct mg_connection *nc = (struct mg_connection *) user_data; + (void) ev_data; + + if (nc == NULL) { + /* The corresponding network connection was closed. */ + cgi_nc->flags |= MG_F_CLOSE_IMMEDIATELY; + return; + } + + switch (ev) { + case MG_EV_RECV: + /* + * CGI script does not output reply line, like "HTTP/1.1 CODE XXXXX\n" + * It outputs headers, then body. Headers might include "Status" + * header, which changes CODE, and it might include "Location" header + * which changes CODE to 302. + * + * Therefore we do not send the output from the CGI script to the user + * until all CGI headers are received. + * + * Here we parse the output from the CGI script, and if all headers has + * been received, send appropriate reply line, and forward all + * received headers to the client. + */ + if (nc->flags & MG_F_HTTP_CGI_PARSE_HEADERS) { + struct mbuf *io = &cgi_nc->recv_mbuf; + int len = mg_http_get_request_len(io->buf, io->len); + + if (len == 0) break; + if (len < 0 || io->len > MG_MAX_HTTP_REQUEST_SIZE) { + cgi_nc->flags |= MG_F_CLOSE_IMMEDIATELY; + mg_http_send_error(nc, 500, "Bad headers"); + } else { + struct http_message hm; + struct mg_str *h; + mg_http_parse_headers(io->buf, io->buf + io->len, io->len, &hm); + if (mg_get_http_header(&hm, "Location") != NULL) { + mg_printf(nc, "%s", "HTTP/1.1 302 Moved\r\n"); + } else if ((h = mg_get_http_header(&hm, "Status")) != NULL) { + mg_printf(nc, "HTTP/1.1 %.*s\r\n", (int) h->len, h->p); + } else { + mg_printf(nc, "%s", "HTTP/1.1 200 OK\r\n"); + } + } + nc->flags &= ~MG_F_HTTP_CGI_PARSE_HEADERS; + } + if (!(nc->flags & MG_F_HTTP_CGI_PARSE_HEADERS)) { + mg_forward(cgi_nc, nc); + } + break; + case MG_EV_CLOSE: + DBG(("%p CLOSE", cgi_nc)); + mg_http_free_proto_data_cgi(&mg_http_get_proto_data(nc)->cgi); + nc->flags |= MG_F_SEND_AND_CLOSE; + break; + } +} + +MG_INTERNAL void mg_handle_cgi(struct mg_connection *nc, const char *prog, + const struct mg_str *path_info, + const struct http_message *hm, + const struct mg_serve_http_opts *opts) { + struct mg_cgi_env_block blk; + char dir[MG_MAX_PATH]; + const char *p; + sock_t fds[2]; + + DBG(("%p [%s]", nc, prog)); + mg_prepare_cgi_environment(nc, prog, path_info, hm, opts, &blk); + /* + * CGI must be executed in its own directory. 'dir' must point to the + * directory containing executable program, 'p' must point to the + * executable program name relative to 'dir'. + */ + if ((p = strrchr(prog, DIRSEP)) == NULL) { + snprintf(dir, sizeof(dir), "%s", "."); + } else { + snprintf(dir, sizeof(dir), "%.*s", (int) (p - prog), prog); + prog = p + 1; + } + + if (!mg_socketpair(fds, SOCK_STREAM)) { + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + return; + } + +#ifndef _WIN32 + struct sigaction sa; + + sigemptyset(&sa.sa_mask); + sa.sa_handler = SIG_IGN; + sa.sa_flags = 0; + sigaction(SIGCHLD, &sa, NULL); +#endif + + if (mg_start_process(opts->cgi_interpreter, prog, blk.buf, blk.vars, dir, + fds[1]) != 0) { + size_t n = nc->recv_mbuf.len - (hm->message.len - hm->body.len); + struct mg_connection *cgi_nc = + mg_add_sock(nc->mgr, fds[0], mg_cgi_ev_handler MG_UD_ARG(nc)); + struct mg_http_proto_data *cgi_pd = mg_http_get_proto_data(nc); + cgi_pd->cgi.cgi_nc = cgi_nc; +#if !MG_ENABLE_CALLBACK_USERDATA + cgi_pd->cgi.cgi_nc->user_data = nc; +#endif + nc->flags |= MG_F_HTTP_CGI_PARSE_HEADERS; + /* Push POST data to the CGI */ + if (n > 0 && n < nc->recv_mbuf.len) { + mg_send(cgi_pd->cgi.cgi_nc, hm->body.p, n); + } + mbuf_remove(&nc->recv_mbuf, nc->recv_mbuf.len); + } else { + closesocket(fds[0]); + mg_http_send_error(nc, 500, "CGI failure"); + } + +#ifndef _WIN32 + closesocket(fds[1]); /* On Windows, CGI stdio thread closes that socket */ +#endif +} + +MG_INTERNAL void mg_http_free_proto_data_cgi(struct mg_http_proto_data_cgi *d) { + if (d == NULL) return; + if (d->cgi_nc != NULL) { + d->cgi_nc->flags |= MG_F_CLOSE_IMMEDIATELY; + d->cgi_nc->user_data = NULL; + } + memset(d, 0, sizeof(*d)); +} + +#endif /* MG_ENABLE_HTTP && MG_ENABLE_HTTP_CGI */ +#ifdef MG_MODULE_LINES +#line 1 "mongoose/src/http_ssi.c" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +#if MG_ENABLE_HTTP && MG_ENABLE_HTTP_SSI && MG_ENABLE_FILESYSTEM + +static void mg_send_ssi_file(struct mg_connection *nc, struct http_message *hm, + const char *path, FILE *fp, int include_level, + const struct mg_serve_http_opts *opts); + +static void mg_send_file_data(struct mg_connection *nc, FILE *fp) { + char buf[BUFSIZ]; + size_t n; + while ((n = mg_fread(buf, 1, sizeof(buf), fp)) > 0) { + mg_send(nc, buf, n); + } +} + +static void mg_do_ssi_include(struct mg_connection *nc, struct http_message *hm, + const char *ssi, char *tag, int include_level, + const struct mg_serve_http_opts *opts) { + char file_name[MG_MAX_PATH], path[MG_MAX_PATH], *p; + FILE *fp; + + /* + * sscanf() is safe here, since send_ssi_file() also uses buffer + * of size MG_BUF_LEN to get the tag. So strlen(tag) is always < MG_BUF_LEN. + */ + if (sscanf(tag, " virtual=\"%[^\"]\"", file_name) == 1) { + /* File name is relative to the webserver root */ + snprintf(path, sizeof(path), "%s/%s", opts->document_root, file_name); + } else if (sscanf(tag, " abspath=\"%[^\"]\"", file_name) == 1) { + /* + * File name is relative to the webserver working directory + * or it is absolute system path + */ + snprintf(path, sizeof(path), "%s", file_name); + } else if (sscanf(tag, " file=\"%[^\"]\"", file_name) == 1 || + sscanf(tag, " \"%[^\"]\"", file_name) == 1) { + /* File name is relative to the currect document */ + snprintf(path, sizeof(path), "%s", ssi); + if ((p = strrchr(path, DIRSEP)) != NULL) { + p[1] = '\0'; + } + snprintf(path + strlen(path), sizeof(path) - strlen(path), "%s", file_name); + } else { + mg_printf(nc, "Bad SSI #include: [%s]", tag); + return; + } + + if ((fp = mg_fopen(path, "rb")) == NULL) { + mg_printf(nc, "SSI include error: mg_fopen(%s): %s", path, + strerror(mg_get_errno())); + } else { + mg_set_close_on_exec((sock_t) fileno(fp)); + if (mg_match_prefix(opts->ssi_pattern, strlen(opts->ssi_pattern), path) > + 0) { + mg_send_ssi_file(nc, hm, path, fp, include_level + 1, opts); + } else { + mg_send_file_data(nc, fp); + } + fclose(fp); + } +} + +#if MG_ENABLE_HTTP_SSI_EXEC +static void do_ssi_exec(struct mg_connection *nc, char *tag) { + char cmd[BUFSIZ]; + FILE *fp; + + if (sscanf(tag, " \"%[^\"]\"", cmd) != 1) { + mg_printf(nc, "Bad SSI #exec: [%s]", tag); + } else if ((fp = popen(cmd, "r")) == NULL) { + mg_printf(nc, "Cannot SSI #exec: [%s]: %s", cmd, strerror(mg_get_errno())); + } else { + mg_send_file_data(nc, fp); + pclose(fp); + } +} +#endif /* MG_ENABLE_HTTP_SSI_EXEC */ + +/* + * SSI directive has the following format: + * <!--#directive parameter=value parameter=value --> + */ +static void mg_send_ssi_file(struct mg_connection *nc, struct http_message *hm, + const char *path, FILE *fp, int include_level, + const struct mg_serve_http_opts *opts) { + static const struct mg_str btag = MG_MK_STR("<!--#"); + static const struct mg_str d_include = MG_MK_STR("include"); + static const struct mg_str d_call = MG_MK_STR("call"); +#if MG_ENABLE_HTTP_SSI_EXEC + static const struct mg_str d_exec = MG_MK_STR("exec"); +#endif + char buf[BUFSIZ], *p = buf + btag.len; /* p points to SSI directive */ + int ch, len, in_ssi_tag; + + if (include_level > 10) { + mg_printf(nc, "SSI #include level is too deep (%s)", path); + return; + } + + in_ssi_tag = len = 0; + while ((ch = fgetc(fp)) != EOF) { + if (in_ssi_tag && ch == '>' && buf[len - 1] == '-' && buf[len - 2] == '-') { + size_t i = len - 2; + in_ssi_tag = 0; + + /* Trim closing --> */ + buf[i--] = '\0'; + while (i > 0 && buf[i] == ' ') { + buf[i--] = '\0'; + } + + /* Handle known SSI directives */ + if (strncmp(p, d_include.p, d_include.len) == 0) { + mg_do_ssi_include(nc, hm, path, p + d_include.len + 1, include_level, + opts); + } else if (strncmp(p, d_call.p, d_call.len) == 0) { + struct mg_ssi_call_ctx cctx; + memset(&cctx, 0, sizeof(cctx)); + cctx.req = hm; + cctx.file = mg_mk_str(path); + cctx.arg = mg_mk_str(p + d_call.len + 1); + mg_call(nc, NULL, nc->user_data, MG_EV_SSI_CALL, + (void *) cctx.arg.p); /* NUL added above */ + mg_call(nc, NULL, nc->user_data, MG_EV_SSI_CALL_CTX, &cctx); +#if MG_ENABLE_HTTP_SSI_EXEC + } else if (strncmp(p, d_exec.p, d_exec.len) == 0) { + do_ssi_exec(nc, p + d_exec.len + 1); +#endif + } else { + /* Silently ignore unknown SSI directive. */ + } + len = 0; + } else if (ch == '<') { + in_ssi_tag = 1; + if (len > 0) { + mg_send(nc, buf, (size_t) len); + } + len = 0; + buf[len++] = ch & 0xff; + } else if (in_ssi_tag) { + if (len == (int) btag.len && strncmp(buf, btag.p, btag.len) != 0) { + /* Not an SSI tag */ + in_ssi_tag = 0; + } else if (len == (int) sizeof(buf) - 2) { + mg_printf(nc, "%s: SSI tag is too large", path); + len = 0; + } + buf[len++] = ch & 0xff; + } else { + buf[len++] = ch & 0xff; + if (len == (int) sizeof(buf)) { + mg_send(nc, buf, (size_t) len); + len = 0; + } + } + } + + /* Send the rest of buffered data */ + if (len > 0) { + mg_send(nc, buf, (size_t) len); + } +} + +MG_INTERNAL void mg_handle_ssi_request(struct mg_connection *nc, + struct http_message *hm, + const char *path, + const struct mg_serve_http_opts *opts) { + FILE *fp; + struct mg_str mime_type; + DBG(("%p %s", nc, path)); + + if ((fp = mg_fopen(path, "rb")) == NULL) { + mg_http_send_error(nc, 404, NULL); + } else { + mg_set_close_on_exec((sock_t) fileno(fp)); + + mime_type = mg_get_mime_type(path, "text/plain", opts); + mg_send_response_line(nc, 200, opts->extra_headers); + mg_printf(nc, + "Content-Type: %.*s\r\n" + "Connection: close\r\n\r\n", + (int) mime_type.len, mime_type.p); + mg_send_ssi_file(nc, hm, path, fp, 0, opts); + fclose(fp); + nc->flags |= MG_F_SEND_AND_CLOSE; + } +} + +#endif /* MG_ENABLE_HTTP_SSI && MG_ENABLE_HTTP && MG_ENABLE_FILESYSTEM */ +#ifdef MG_MODULE_LINES +#line 1 "mongoose/src/http_webdav.c" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +#if MG_ENABLE_HTTP && MG_ENABLE_HTTP_WEBDAV + +MG_INTERNAL int mg_is_dav_request(const struct mg_str *s) { + static const char *methods[] = { + "PUT", + "DELETE", + "MKCOL", + "PROPFIND", + "MOVE" +#if MG_ENABLE_FAKE_DAVLOCK + , + "LOCK", + "UNLOCK" +#endif + }; + size_t i; + + for (i = 0; i < ARRAY_SIZE(methods); i++) { + if (mg_vcmp(s, methods[i]) == 0) { + return 1; + } + } + + return 0; +} + +static int mg_mkdir(const char *path, uint32_t mode) { +#ifndef _WIN32 + return mkdir(path, mode); +#else + (void) mode; + return _mkdir(path); +#endif +} + +static void mg_print_props(struct mg_connection *nc, const char *name, + cs_stat_t *stp) { + char mtime[64]; + time_t t = stp->st_mtime; /* store in local variable for NDK compile */ + struct mg_str name_esc = mg_url_encode(mg_mk_str(name)); + mg_gmt_time_string(mtime, sizeof(mtime), &t); + mg_printf(nc, + "<d:response>" + "<d:href>%s</d:href>" + "<d:propstat>" + "<d:prop>" + "<d:resourcetype>%s</d:resourcetype>" + "<d:getcontentlength>%" INT64_FMT + "</d:getcontentlength>" + "<d:getlastmodified>%s</d:getlastmodified>" + "</d:prop>" + "<d:status>HTTP/1.1 200 OK</d:status>" + "</d:propstat>" + "</d:response>\n", + name_esc.p, S_ISDIR(stp->st_mode) ? "<d:collection/>" : "", + (int64_t) stp->st_size, mtime); + free((void *) name_esc.p); +} + +MG_INTERNAL void mg_handle_propfind(struct mg_connection *nc, const char *path, + cs_stat_t *stp, struct http_message *hm, + struct mg_serve_http_opts *opts) { + static const char header[] = + "HTTP/1.1 207 Multi-Status\r\n" + "Connection: close\r\n" + "Content-Type: text/xml; charset=utf-8\r\n\r\n" + "<?xml version=\"1.0\" encoding=\"utf-8\"?>" + "<d:multistatus xmlns:d='DAV:'>\n"; + static const char footer[] = "</d:multistatus>\n"; + const struct mg_str *depth = mg_get_http_header(hm, "Depth"); + + /* Print properties for the requested resource itself */ + if (S_ISDIR(stp->st_mode) && + strcmp(opts->enable_directory_listing, "yes") != 0) { + mg_printf(nc, "%s", "HTTP/1.1 403 Directory Listing Denied\r\n\r\n"); + } else { + char uri[MG_MAX_PATH]; + mg_send(nc, header, sizeof(header) - 1); + snprintf(uri, sizeof(uri), "%.*s", (int) hm->uri.len, hm->uri.p); + mg_print_props(nc, uri, stp); + if (S_ISDIR(stp->st_mode) && (depth == NULL || mg_vcmp(depth, "0") != 0)) { + mg_scan_directory(nc, path, opts, mg_print_props); + } + mg_send(nc, footer, sizeof(footer) - 1); + nc->flags |= MG_F_SEND_AND_CLOSE; + } +} + +#if MG_ENABLE_FAKE_DAVLOCK +/* + * Windows explorer (probably there are another WebDav clients like it) + * requires LOCK support in webdav. W/out this, it still works, but fails + * to save file: shows error message and offers "Save As". + * "Save as" works, but this message is very annoying. + * This is fake lock, which doesn't lock something, just returns LOCK token, + * UNLOCK always answers "OK". + * With this fake LOCK Windows Explorer looks happy and saves file. + * NOTE: that is not DAV LOCK imlementation, it is just a way to shut up + * Windows native DAV client. This is why FAKE LOCK is not enabed by default + */ +MG_INTERNAL void mg_handle_lock(struct mg_connection *nc, const char *path) { + static const char *reply = + "HTTP/1.1 207 Multi-Status\r\n" + "Connection: close\r\n" + "Content-Type: text/xml; charset=utf-8\r\n\r\n" + "<?xml version=\"1.0\" encoding=\"utf-8\"?>" + "<d:multistatus xmlns:d='DAV:'>\n" + "<D:lockdiscovery>\n" + "<D:activelock>\n" + "<D:locktoken>\n" + "<D:href>\n" + "opaquelocktoken:%s%u" + "</D:href>" + "</D:locktoken>" + "</D:activelock>\n" + "</D:lockdiscovery>" + "</d:multistatus>\n"; + mg_printf(nc, reply, path, (unsigned int) mg_time()); + nc->flags |= MG_F_SEND_AND_CLOSE; +} +#endif + +MG_INTERNAL void mg_handle_mkcol(struct mg_connection *nc, const char *path, + struct http_message *hm) { + int status_code = 500; + if (hm->body.len != (size_t) ~0 && hm->body.len > 0) { + status_code = 415; + } else if (!mg_mkdir(path, 0755)) { + status_code = 201; + } else if (errno == EEXIST) { + status_code = 405; + } else if (errno == EACCES) { + status_code = 403; + } else if (errno == ENOENT) { + status_code = 409; + } else { + status_code = 500; + } + mg_http_send_error(nc, status_code, NULL); +} + +static int mg_remove_directory(const struct mg_serve_http_opts *opts, + const char *dir) { + char path[MG_MAX_PATH]; + struct dirent *dp; + cs_stat_t st; + DIR *dirp; + + if ((dirp = opendir(dir)) == NULL) return 0; + + while ((dp = readdir(dirp)) != NULL) { + if (mg_is_file_hidden((const char *) dp->d_name, opts, 1)) { + continue; + } + snprintf(path, sizeof(path), "%s%c%s", dir, '/', dp->d_name); + mg_stat(path, &st); + if (S_ISDIR(st.st_mode)) { + mg_remove_directory(opts, path); + } else { + remove(path); + } + } + closedir(dirp); + rmdir(dir); + + return 1; +} + +MG_INTERNAL void mg_handle_move(struct mg_connection *c, + const struct mg_serve_http_opts *opts, + const char *path, struct http_message *hm) { + const struct mg_str *dest = mg_get_http_header(hm, "Destination"); + if (dest == NULL) { + mg_http_send_error(c, 411, NULL); + } else { + const char *p = (char *) memchr(dest->p, '/', dest->len); + if (p != NULL && p[1] == '/' && + (p = (char *) memchr(p + 2, '/', dest->p + dest->len - p)) != NULL) { + char buf[MG_MAX_PATH]; + snprintf(buf, sizeof(buf), "%s%.*s", opts->dav_document_root, + (int) (dest->p + dest->len - p), p); + if (rename(path, buf) == 0) { + mg_http_send_error(c, 200, NULL); + } else { + mg_http_send_error(c, 418, NULL); + } + } else { + mg_http_send_error(c, 500, NULL); + } + } +} + +MG_INTERNAL void mg_handle_delete(struct mg_connection *nc, + const struct mg_serve_http_opts *opts, + const char *path) { + cs_stat_t st; + if (mg_stat(path, &st) != 0) { + mg_http_send_error(nc, 404, NULL); + } else if (S_ISDIR(st.st_mode)) { + mg_remove_directory(opts, path); + mg_http_send_error(nc, 204, NULL); + } else if (remove(path) == 0) { + mg_http_send_error(nc, 204, NULL); + } else { + mg_http_send_error(nc, 423, NULL); + } +} + +/* Return -1 on error, 1 on success. */ +static int mg_create_itermediate_directories(const char *path) { + const char *s; + + /* Create intermediate directories if they do not exist */ + for (s = path + 1; *s != '\0'; s++) { + if (*s == '/') { + char buf[MG_MAX_PATH]; + cs_stat_t st; + snprintf(buf, sizeof(buf), "%.*s", (int) (s - path), path); + buf[sizeof(buf) - 1] = '\0'; + if (mg_stat(buf, &st) != 0 && mg_mkdir(buf, 0755) != 0) { + return -1; + } + } + } + + return 1; +} + +MG_INTERNAL void mg_handle_put(struct mg_connection *nc, const char *path, + struct http_message *hm) { + struct mg_http_proto_data *pd = mg_http_get_proto_data(nc); + cs_stat_t st; + const struct mg_str *cl_hdr = mg_get_http_header(hm, "Content-Length"); + int rc, status_code = mg_stat(path, &st) == 0 ? 200 : 201; + + mg_http_free_proto_data_file(&pd->file); + if ((rc = mg_create_itermediate_directories(path)) == 0) { + mg_printf(nc, "HTTP/1.1 %d OK\r\nContent-Length: 0\r\n\r\n", status_code); + } else if (rc == -1) { + mg_http_send_error(nc, 500, NULL); + } else if (cl_hdr == NULL) { + mg_http_send_error(nc, 411, NULL); + } else if ((pd->file.fp = mg_fopen(path, "w+b")) == NULL) { + mg_http_send_error(nc, 500, NULL); + } else { + const struct mg_str *range_hdr = mg_get_http_header(hm, "Content-Range"); + int64_t r1 = 0, r2 = 0; + pd->file.type = DATA_PUT; + mg_set_close_on_exec((sock_t) fileno(pd->file.fp)); + pd->file.cl = to64(cl_hdr->p); + if (range_hdr != NULL && + mg_http_parse_range_header(range_hdr, &r1, &r2) > 0) { + status_code = 206; + fseeko(pd->file.fp, r1, SEEK_SET); + pd->file.cl = r2 > r1 ? r2 - r1 + 1 : pd->file.cl - r1; + } + mg_printf(nc, "HTTP/1.1 %d OK\r\nContent-Length: 0\r\n\r\n", status_code); + /* Remove HTTP request from the mbuf, leave only payload */ + mbuf_remove(&nc->recv_mbuf, hm->message.len - hm->body.len); + mg_http_transfer_file_data(nc); + } +} + +#endif /* MG_ENABLE_HTTP && MG_ENABLE_HTTP_WEBDAV */ +#ifdef MG_MODULE_LINES +#line 1 "mongoose/src/http_websocket.c" +#endif +/* + * Copyright (c) 2014 Cesanta Software Limited + * All rights reserved + */ + +#if MG_ENABLE_HTTP && MG_ENABLE_HTTP_WEBSOCKET + +/* Amalgamated: #include "common/sha1.h" */ + +#ifndef MG_WEBSOCKET_PING_INTERVAL_SECONDS +#define MG_WEBSOCKET_PING_INTERVAL_SECONDS 5 +#endif + +static int mg_is_ws_fragment(unsigned char flags) { + return (flags & 0x80) == 0 || (flags & 0x0f) == 0; +} + +static int mg_is_ws_first_fragment(unsigned char flags) { + return (flags & 0x80) == 0 && (flags & 0x0f) != 0; +} + +static void mg_handle_incoming_websocket_frame(struct mg_connection *nc, + struct websocket_message *wsm) { + if (wsm->flags & 0x8) { + mg_call(nc, nc->handler, nc->user_data, MG_EV_WEBSOCKET_CONTROL_FRAME, wsm); + } else { + mg_call(nc, nc->handler, nc->user_data, MG_EV_WEBSOCKET_FRAME, wsm); + } +} + +static struct mg_ws_proto_data *mg_ws_get_proto_data(struct mg_connection *nc) { + struct mg_http_proto_data *htd = mg_http_get_proto_data(nc); + return (htd != NULL ? &htd->ws_data : NULL); +} + +static int mg_deliver_websocket_data(struct mg_connection *nc) { + /* Using unsigned char *, cause of integer arithmetic below */ + uint64_t i, data_len = 0, frame_len = 0, buf_len = nc->recv_mbuf.len, len, + mask_len = 0, header_len = 0; + unsigned char *p = (unsigned char *) nc->recv_mbuf.buf, *buf = p, + *e = p + buf_len; + struct mg_ws_proto_data *wsd = mg_ws_get_proto_data(nc); + int ok; + int reass = buf_len > 0 && mg_is_ws_fragment(p[0]) && + !(nc->flags & MG_F_WEBSOCKET_NO_DEFRAG); + + /* If that's a continuation frame that must be reassembled, handle it */ + if (reass && !mg_is_ws_first_fragment(p[0]) && buf_len >= 1 && + buf_len >= 1 + wsd->reass_len) { + buf += 1 + wsd->reass_len; + buf_len -= 1 + wsd->reass_len; + } + + if (buf_len >= 2) { + len = buf[1] & 0x7f; + mask_len = buf[1] & 0x80 ? 4 : 0; + if (len < 126 && buf_len >= mask_len) { + data_len = len; + header_len = 2 + mask_len; + } else if (len == 126 && buf_len >= 4 + mask_len) { + header_len = 4 + mask_len; + data_len = ntohs(*(uint16_t *) &buf[2]); + } else if (buf_len >= 10 + mask_len) { + header_len = 10 + mask_len; + data_len = (((uint64_t) ntohl(*(uint32_t *) &buf[2])) << 32) + + ntohl(*(uint32_t *) &buf[6]); + } + } + + frame_len = header_len + data_len; + ok = (frame_len > 0 && frame_len <= buf_len); + + /* Check for overflow */ + if (frame_len < header_len || frame_len < data_len) { + ok = 0; + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + } + + if (ok) { + struct websocket_message wsm; + + wsm.size = (size_t) data_len; + wsm.data = buf + header_len; + wsm.flags = buf[0]; + + /* Apply mask if necessary */ + if (mask_len > 0) { + for (i = 0; i < data_len; i++) { + buf[i + header_len] ^= (buf + header_len - mask_len)[i % 4]; + } + } + + if (reass) { + /* On first fragmented frame, nullify size */ + if (mg_is_ws_first_fragment(wsm.flags)) { + p[0] &= ~0x0f; /* Next frames will be treated as continuation */ + buf = p + 1; + wsd->reass_len = 0; + } + + /* Append this frame to the reassembled buffer */ + memmove(buf, wsm.data, e - wsm.data); + wsd->reass_len += wsm.size; + nc->recv_mbuf.len -= wsm.data - buf; + + /* On last fragmented frame - call user handler and remove data */ + if (wsm.flags & 0x80) { + wsm.data = p + 1; + wsm.size = wsd->reass_len; + mg_handle_incoming_websocket_frame(nc, &wsm); + mbuf_remove(&nc->recv_mbuf, 1 + wsd->reass_len); + wsd->reass_len = 0; + } + } else { + /* TODO(lsm): properly handle OOB control frames during defragmentation */ + mg_handle_incoming_websocket_frame(nc, &wsm); + mbuf_remove(&nc->recv_mbuf, (size_t) frame_len); /* Cleanup frame */ + wsd->reass_len = 0; + } + + /* If the frame is not reassembled - client closes and close too */ + if (!reass && (buf[0] & 0x0f) == WEBSOCKET_OP_CLOSE) { + nc->flags |= MG_F_SEND_AND_CLOSE; + } + } + + return ok; +} + +struct ws_mask_ctx { + size_t pos; /* zero means unmasked */ + uint32_t mask; +}; + +static uint32_t mg_ws_random_mask(void) { + uint32_t mask; +/* + * The spec requires WS client to generate hard to + * guess mask keys. From RFC6455, Section 5.3: + * + * The unpredictability of the masking key is essential to prevent + * authors of malicious applications from selecting the bytes that appear on + * the wire. + * + * Hence this feature is essential when the actual end user of this API + * is untrusted code that wouldn't have access to a lower level net API + * anyway (e.g. web browsers). Hence this feature is low prio for most + * mongoose use cases and thus can be disabled, e.g. when porting to a platform + * that lacks rand(). + */ +#if MG_DISABLE_WS_RANDOM_MASK + mask = 0xefbeadde; /* generated with a random number generator, I swear */ +#else + if (sizeof(long) >= 4) { + mask = (uint32_t) rand(); + } else if (sizeof(long) == 2) { + mask = (uint32_t) rand() << 16 | (uint32_t) rand(); + } +#endif + return mask; +} + +static void mg_send_ws_header(struct mg_connection *nc, int op, size_t len, + struct ws_mask_ctx *ctx) { + int header_len; + unsigned char header[10]; + + header[0] = (op & WEBSOCKET_DONT_FIN ? 0x0 : 0x80) + (op & 0x0f); + if (len < 126) { + header[1] = (unsigned char) len; + header_len = 2; + } else if (len < 65535) { + uint16_t tmp = htons((uint16_t) len); + header[1] = 126; + memcpy(&header[2], &tmp, sizeof(tmp)); + header_len = 4; + } else { + uint32_t tmp; + header[1] = 127; + tmp = htonl((uint32_t)((uint64_t) len >> 32)); + memcpy(&header[2], &tmp, sizeof(tmp)); + tmp = htonl((uint32_t)(len & 0xffffffff)); + memcpy(&header[6], &tmp, sizeof(tmp)); + header_len = 10; + } + + /* client connections enable masking */ + if (nc->listener == NULL) { + header[1] |= 1 << 7; /* set masking flag */ + mg_send(nc, header, header_len); + ctx->mask = mg_ws_random_mask(); + mg_send(nc, &ctx->mask, sizeof(ctx->mask)); + ctx->pos = nc->send_mbuf.len; + } else { + mg_send(nc, header, header_len); + ctx->pos = 0; + } +} + +static void mg_ws_mask_frame(struct mbuf *mbuf, struct ws_mask_ctx *ctx) { + size_t i; + if (ctx->pos == 0) return; + for (i = 0; i < (mbuf->len - ctx->pos); i++) { + mbuf->buf[ctx->pos + i] ^= ((char *) &ctx->mask)[i % 4]; + } +} + +void mg_send_websocket_frame(struct mg_connection *nc, int op, const void *data, + size_t len) { + struct ws_mask_ctx ctx; + DBG(("%p %d %d", nc, op, (int) len)); + mg_send_ws_header(nc, op, len, &ctx); + mg_send(nc, data, len); + + mg_ws_mask_frame(&nc->send_mbuf, &ctx); + + if (op == WEBSOCKET_OP_CLOSE) { + nc->flags |= MG_F_SEND_AND_CLOSE; + } +} + +void mg_send_websocket_framev(struct mg_connection *nc, int op, + const struct mg_str *strv, int strvcnt) { + struct ws_mask_ctx ctx; + int i; + int len = 0; + for (i = 0; i < strvcnt; i++) { + len += strv[i].len; + } + + mg_send_ws_header(nc, op, len, &ctx); + + for (i = 0; i < strvcnt; i++) { + mg_send(nc, strv[i].p, strv[i].len); + } + + mg_ws_mask_frame(&nc->send_mbuf, &ctx); + + if (op == WEBSOCKET_OP_CLOSE) { + nc->flags |= MG_F_SEND_AND_CLOSE; + } +} + +void mg_printf_websocket_frame(struct mg_connection *nc, int op, + const char *fmt, ...) { + char mem[MG_VPRINTF_BUFFER_SIZE], *buf = mem; + va_list ap; + int len; + + va_start(ap, fmt); + if ((len = mg_avprintf(&buf, sizeof(mem), fmt, ap)) > 0) { + mg_send_websocket_frame(nc, op, buf, len); + } + va_end(ap); + + if (buf != mem && buf != NULL) { + MG_FREE(buf); + } +} + +MG_INTERNAL void mg_ws_handler(struct mg_connection *nc, int ev, + void *ev_data MG_UD_ARG(void *user_data)) { + mg_call(nc, nc->handler, nc->user_data, ev, ev_data); + + switch (ev) { + case MG_EV_RECV: + do { + } while (mg_deliver_websocket_data(nc)); + break; + case MG_EV_POLL: + /* Ping idle websocket connections */ + { + time_t now = *(time_t *) ev_data; + if (nc->flags & MG_F_IS_WEBSOCKET && + now > nc->last_io_time + MG_WEBSOCKET_PING_INTERVAL_SECONDS) { + mg_send_websocket_frame(nc, WEBSOCKET_OP_PING, "", 0); + } + } + break; + default: + break; + } +#if MG_ENABLE_CALLBACK_USERDATA + (void) user_data; +#endif +} + +#ifndef MG_EXT_SHA1 +void mg_hash_sha1_v(size_t num_msgs, const uint8_t *msgs[], + const size_t *msg_lens, uint8_t *digest) { + size_t i; + cs_sha1_ctx sha_ctx; + cs_sha1_init(&sha_ctx); + for (i = 0; i < num_msgs; i++) { + cs_sha1_update(&sha_ctx, msgs[i], msg_lens[i]); + } + cs_sha1_final(digest, &sha_ctx); +} +#else +extern void mg_hash_sha1_v(size_t num_msgs, const uint8_t *msgs[], + const size_t *msg_lens, uint8_t *digest); +#endif + +MG_INTERNAL void mg_ws_handshake(struct mg_connection *nc, + const struct mg_str *key, + struct http_message *hm) { + static const char *magic = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"; + const uint8_t *msgs[2] = {(const uint8_t *) key->p, (const uint8_t *) magic}; + const size_t msg_lens[2] = {key->len, 36}; + unsigned char sha[20]; + char b64_sha[30]; + struct mg_str *s; + + mg_hash_sha1_v(2, msgs, msg_lens, sha); + mg_base64_encode(sha, sizeof(sha), b64_sha); + mg_printf(nc, "%s", + "HTTP/1.1 101 Switching Protocols\r\n" + "Upgrade: websocket\r\n" + "Connection: Upgrade\r\n"); + + s = mg_get_http_header(hm, "Sec-WebSocket-Protocol"); + if (s != NULL) { + mg_printf(nc, "Sec-WebSocket-Protocol: %.*s\r\n", (int) s->len, s->p); + } + mg_printf(nc, "Sec-WebSocket-Accept: %s%s", b64_sha, "\r\n\r\n"); + + DBG(("%p %.*s %s", nc, (int) key->len, key->p, b64_sha)); +} + +void mg_send_websocket_handshake2(struct mg_connection *nc, const char *path, + const char *host, const char *protocol, + const char *extra_headers) { + mg_send_websocket_handshake3(nc, path, host, protocol, extra_headers, NULL, + NULL); +} + +void mg_send_websocket_handshake3(struct mg_connection *nc, const char *path, + const char *host, const char *protocol, + const char *extra_headers, const char *user, + const char *pass) { + mg_send_websocket_handshake3v(nc, mg_mk_str(path), mg_mk_str(host), + mg_mk_str(protocol), mg_mk_str(extra_headers), + mg_mk_str(user), mg_mk_str(pass)); +} + +void mg_send_websocket_handshake3v(struct mg_connection *nc, + const struct mg_str path, + const struct mg_str host, + const struct mg_str protocol, + const struct mg_str extra_headers, + const struct mg_str user, + const struct mg_str pass) { + struct mbuf auth; + char key[25]; + uint32_t nonce[4]; + nonce[0] = mg_ws_random_mask(); + nonce[1] = mg_ws_random_mask(); + nonce[2] = mg_ws_random_mask(); + nonce[3] = mg_ws_random_mask(); + mg_base64_encode((unsigned char *) &nonce, sizeof(nonce), key); + + mbuf_init(&auth, 0); + if (user.len > 0) { + mg_basic_auth_header(user, pass, &auth); + } + + /* + * NOTE: the (auth.buf == NULL ? "" : auth.buf) is because cc3200 libc is + * broken: it doesn't like zero length to be passed to %.*s + * i.e. sprintf("f%.*so", (int)0, NULL), yields `f\0o`. + * because it handles NULL specially (and incorrectly). + */ + mg_printf(nc, + "GET %.*s HTTP/1.1\r\n" + "Upgrade: websocket\r\n" + "Connection: Upgrade\r\n" + "%.*s" + "Sec-WebSocket-Version: 13\r\n" + "Sec-WebSocket-Key: %s\r\n", + (int) path.len, path.p, (int) auth.len, + (auth.buf == NULL ? "" : auth.buf), key); + + /* TODO(mkm): take default hostname from http proto data if host == NULL */ + if (host.len > 0) { + int host_len = (int) (path.p - host.p); /* Account for possible :PORT */ + mg_printf(nc, "Host: %.*s\r\n", host_len, host.p); + } + if (protocol.len > 0) { + mg_printf(nc, "Sec-WebSocket-Protocol: %.*s\r\n", (int) protocol.len, + protocol.p); + } + if (extra_headers.len > 0) { + mg_printf(nc, "%.*s", (int) extra_headers.len, extra_headers.p); + } + mg_printf(nc, "\r\n"); + + mbuf_free(&auth); +} + +void mg_send_websocket_handshake(struct mg_connection *nc, const char *path, + const char *extra_headers) { + struct mg_str null_str = MG_NULL_STR; + mg_send_websocket_handshake3v( + nc, mg_mk_str(path), null_str /* host */, null_str /* protocol */, + mg_mk_str(extra_headers), null_str /* user */, null_str /* pass */); +} + +struct mg_connection *mg_connect_ws_opt( + struct mg_mgr *mgr, MG_CB(mg_event_handler_t ev_handler, void *user_data), + struct mg_connect_opts opts, const char *url, const char *protocol, + const char *extra_headers) { + struct mg_str null_str = MG_NULL_STR; + struct mg_str host = MG_NULL_STR, path = MG_NULL_STR, user_info = MG_NULL_STR; + struct mg_connection *nc = + mg_connect_http_base(mgr, MG_CB(ev_handler, user_data), opts, "http", + "ws", "https", "wss", url, &path, &user_info, &host); + if (nc != NULL) { + mg_send_websocket_handshake3v(nc, path, host, mg_mk_str(protocol), + mg_mk_str(extra_headers), user_info, + null_str); + } + return nc; +} + +struct mg_connection *mg_connect_ws( + struct mg_mgr *mgr, MG_CB(mg_event_handler_t ev_handler, void *user_data), + const char *url, const char *protocol, const char *extra_headers) { + struct mg_connect_opts opts; + memset(&opts, 0, sizeof(opts)); + return mg_connect_ws_opt(mgr, MG_CB(ev_handler, user_data), opts, url, + protocol, extra_headers); +} +#endif /* MG_ENABLE_HTTP && MG_ENABLE_HTTP_WEBSOCKET */ +#ifdef MG_MODULE_LINES +#line 1 "mongoose/src/util.c" +#endif +/* + * Copyright (c) 2014 Cesanta Software Limited + * All rights reserved + */ + +/* Amalgamated: #include "common/cs_base64.h" */ +/* Amalgamated: #include "mongoose/src/internal.h" */ +/* Amalgamated: #include "mongoose/src/util.h" */ + +/* For platforms with limited libc */ +#ifndef MAX +#define MAX(a, b) ((a) > (b) ? (a) : (b)) +#endif + +const char *mg_skip(const char *s, const char *end, const char *delims, + struct mg_str *v) { + v->p = s; + while (s < end && strchr(delims, *(unsigned char *) s) == NULL) s++; + v->len = s - v->p; + while (s < end && strchr(delims, *(unsigned char *) s) != NULL) s++; + return s; +} + +#if MG_ENABLE_FILESYSTEM && !defined(MG_USER_FILE_FUNCTIONS) +int mg_stat(const char *path, cs_stat_t *st) { +#ifdef _WIN32 + wchar_t wpath[MG_MAX_PATH]; + to_wchar(path, wpath, ARRAY_SIZE(wpath)); + DBG(("[%ls] -> %d", wpath, _wstati64(wpath, st))); + return _wstati64(wpath, st); +#else + return stat(path, st); +#endif +} + +FILE *mg_fopen(const char *path, const char *mode) { +#ifdef _WIN32 + wchar_t wpath[MG_MAX_PATH], wmode[10]; + to_wchar(path, wpath, ARRAY_SIZE(wpath)); + to_wchar(mode, wmode, ARRAY_SIZE(wmode)); + return _wfopen(wpath, wmode); +#else + return fopen(path, mode); +#endif +} + +int mg_open(const char *path, int flag, int mode) { /* LCOV_EXCL_LINE */ +#if defined(_WIN32) && !defined(WINCE) + wchar_t wpath[MG_MAX_PATH]; + to_wchar(path, wpath, ARRAY_SIZE(wpath)); + return _wopen(wpath, flag, mode); +#else + return open(path, flag, mode); /* LCOV_EXCL_LINE */ +#endif +} + +size_t mg_fread(void *ptr, size_t size, size_t count, FILE *f) { + return fread(ptr, size, count, f); +} + +size_t mg_fwrite(const void *ptr, size_t size, size_t count, FILE *f) { + return fwrite(ptr, size, count, f); +} +#endif + +void mg_base64_encode(const unsigned char *src, int src_len, char *dst) { + cs_base64_encode(src, src_len, dst); +} + +int mg_base64_decode(const unsigned char *s, int len, char *dst) { + return cs_base64_decode(s, len, dst, NULL); +} + +#if MG_ENABLE_THREADS +void *mg_start_thread(void *(*f)(void *), void *p) { +#ifdef WINCE + return (void *) CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE) f, p, 0, NULL); +#elif defined(_WIN32) + return (void *) _beginthread((void(__cdecl *) (void *) ) f, 0, p); +#else + pthread_t thread_id = (pthread_t) 0; + pthread_attr_t attr; + + (void) pthread_attr_init(&attr); + (void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); + +#if defined(MG_STACK_SIZE) && MG_STACK_SIZE > 1 + (void) pthread_attr_setstacksize(&attr, MG_STACK_SIZE); +#endif + + pthread_create(&thread_id, &attr, f, p); + pthread_attr_destroy(&attr); + + return (void *) thread_id; +#endif +} +#endif /* MG_ENABLE_THREADS */ + +/* Set close-on-exec bit for a given socket. */ +void mg_set_close_on_exec(sock_t sock) { +#if defined(_WIN32) && !defined(WINCE) + (void) SetHandleInformation((HANDLE) sock, HANDLE_FLAG_INHERIT, 0); +#elif defined(__unix__) + fcntl(sock, F_SETFD, FD_CLOEXEC); +#else + (void) sock; +#endif +} + +int mg_sock_addr_to_str(const union socket_address *sa, char *buf, size_t len, + int flags) { + int is_v6; + if (buf == NULL || len <= 0) return 0; + memset(buf, 0, len); +#if MG_ENABLE_IPV6 + is_v6 = sa->sa.sa_family == AF_INET6; +#else + is_v6 = 0; +#endif + if (flags & MG_SOCK_STRINGIFY_IP) { +#if MG_ENABLE_IPV6 + const void *addr = NULL; + char *start = buf; + socklen_t capacity = len; + if (!is_v6) { + addr = &sa->sin.sin_addr; + } else { + addr = (void *) &sa->sin6.sin6_addr; + if (flags & MG_SOCK_STRINGIFY_PORT) { + *buf = '['; + start++; + capacity--; + } + } + if (inet_ntop(sa->sa.sa_family, addr, start, capacity) == NULL) { + goto cleanup; + } +#elif defined(_WIN32) || MG_LWIP || (MG_NET_IF == MG_NET_IF_PIC32) + /* Only Windoze Vista (and newer) have inet_ntop() */ + char *addr_str = inet_ntoa(sa->sin.sin_addr); + if (addr_str != NULL) { + strncpy(buf, inet_ntoa(sa->sin.sin_addr), len - 1); + } else { + goto cleanup; + } +#else + if (inet_ntop(AF_INET, (void *) &sa->sin.sin_addr, buf, len - 1) == NULL) { + goto cleanup; + } +#endif + } + if (flags & MG_SOCK_STRINGIFY_PORT) { + int port = ntohs(sa->sin.sin_port); + if (flags & MG_SOCK_STRINGIFY_IP) { + int buf_len = strlen(buf); + snprintf(buf + buf_len, len - (buf_len + 1), "%s:%d", (is_v6 ? "]" : ""), + port); + } else { + snprintf(buf, len, "%d", port); + } + } + + return strlen(buf); + +cleanup: + *buf = '\0'; + return 0; +} + +int mg_conn_addr_to_str(struct mg_connection *nc, char *buf, size_t len, + int flags) { + union socket_address sa; + memset(&sa, 0, sizeof(sa)); + mg_if_get_conn_addr(nc, flags & MG_SOCK_STRINGIFY_REMOTE, &sa); + return mg_sock_addr_to_str(&sa, buf, len, flags); +} + +#if MG_ENABLE_HEXDUMP +static int mg_hexdump_n(const void *buf, int len, char *dst, int dst_len, + int offset) { + const unsigned char *p = (const unsigned char *) buf; + char ascii[17] = ""; + int i, idx, n = 0; + + for (i = 0; i < len; i++) { + idx = i % 16; + if (idx == 0) { + if (i > 0) n += snprintf(dst + n, MAX(dst_len - n, 0), " %s\n", ascii); + n += snprintf(dst + n, MAX(dst_len - n, 0), "%04x ", i + offset); + } + if (dst_len - n < 0) { + return n; + } + n += snprintf(dst + n, MAX(dst_len - n, 0), " %02x", p[i]); + ascii[idx] = p[i] < 0x20 || p[i] > 0x7e ? '.' : p[i]; + ascii[idx + 1] = '\0'; + } + + while (i++ % 16) n += snprintf(dst + n, MAX(dst_len - n, 0), "%s", " "); + n += snprintf(dst + n, MAX(dst_len - n, 0), " %s\n", ascii); + + return n; +} + +int mg_hexdump(const void *buf, int len, char *dst, int dst_len) { + return mg_hexdump_n(buf, len, dst, dst_len, 0); +} + +void mg_hexdumpf(FILE *fp, const void *buf, int len) { + char tmp[80]; + int offset = 0, n; + while (len > 0) { + n = (len < 16 ? len : 16); + mg_hexdump_n(((const char *) buf) + offset, n, tmp, sizeof(tmp), offset); + fputs(tmp, fp); + offset += n; + len -= n; + } +} + +void mg_hexdump_connection(struct mg_connection *nc, const char *path, + const void *buf, int num_bytes, int ev) { + FILE *fp = NULL; + char src[60], dst[60]; + const char *tag = NULL; + switch (ev) { + case MG_EV_RECV: + tag = "<-"; + break; + case MG_EV_SEND: + tag = "->"; + break; + case MG_EV_ACCEPT: + tag = "<A"; + break; + case MG_EV_CONNECT: + tag = "C>"; + break; + case MG_EV_CLOSE: + tag = "XX"; + break; + } + if (tag == NULL) return; /* Don't log MG_EV_TIMER, etc */ + + if (strcmp(path, "-") == 0) { + fp = stdout; + } else if (strcmp(path, "--") == 0) { + fp = stderr; +#if MG_ENABLE_FILESYSTEM + } else { + fp = mg_fopen(path, "a"); +#endif + } + if (fp == NULL) return; + + mg_conn_addr_to_str(nc, src, sizeof(src), + MG_SOCK_STRINGIFY_IP | MG_SOCK_STRINGIFY_PORT); + mg_conn_addr_to_str(nc, dst, sizeof(dst), MG_SOCK_STRINGIFY_IP | + MG_SOCK_STRINGIFY_PORT | + MG_SOCK_STRINGIFY_REMOTE); + fprintf(fp, "%lu %p %s %s %s %d\n", (unsigned long) mg_time(), (void *) nc, + src, tag, dst, (int) num_bytes); + if (num_bytes > 0) { + mg_hexdumpf(fp, buf, num_bytes); + } + if (fp != stdout && fp != stderr) fclose(fp); +} +#endif + +int mg_is_big_endian(void) { + static const int n = 1; + /* TODO(mkm) use compiletime check with 4-byte char literal */ + return ((char *) &n)[0] == 0; +} + +DO_NOT_WARN_UNUSED MG_INTERNAL int mg_get_errno(void) { +#ifndef WINCE + return errno; +#else + /* TODO(alashkin): translate error codes? */ + return GetLastError(); +#endif +} + +void mg_mbuf_append_base64_putc(char ch, void *user_data) { + struct mbuf *mbuf = (struct mbuf *) user_data; + mbuf_append(mbuf, &ch, sizeof(ch)); +} + +void mg_mbuf_append_base64(struct mbuf *mbuf, const void *data, size_t len) { + struct cs_base64_ctx ctx; + cs_base64_init(&ctx, mg_mbuf_append_base64_putc, mbuf); + cs_base64_update(&ctx, (const char *) data, len); + cs_base64_finish(&ctx); +} + +void mg_basic_auth_header(const struct mg_str user, const struct mg_str pass, + struct mbuf *buf) { + const char *header_prefix = "Authorization: Basic "; + const char *header_suffix = "\r\n"; + + struct cs_base64_ctx ctx; + cs_base64_init(&ctx, mg_mbuf_append_base64_putc, buf); + + mbuf_append(buf, header_prefix, strlen(header_prefix)); + + cs_base64_update(&ctx, user.p, user.len); + if (pass.len > 0) { + cs_base64_update(&ctx, ":", 1); + cs_base64_update(&ctx, pass.p, pass.len); + } + cs_base64_finish(&ctx); + mbuf_append(buf, header_suffix, strlen(header_suffix)); +} + +struct mg_str mg_url_encode(const struct mg_str src) { + static const char *dont_escape = "._-$,;~()/"; + static const char *hex = "0123456789abcdef"; + size_t i = 0; + struct mbuf mb; + mbuf_init(&mb, src.len); + + for (i = 0; i < src.len; i++) { + const unsigned char c = *((const unsigned char *) src.p + i); + if (isalnum(c) || strchr(dont_escape, c) != NULL) { + mbuf_append(&mb, &c, 1); + } else { + mbuf_append(&mb, "%", 1); + mbuf_append(&mb, &hex[c >> 4], 1); + mbuf_append(&mb, &hex[c & 15], 1); + } + } + mbuf_append(&mb, "", 1); + mbuf_trim(&mb); + return mg_mk_str_n(mb.buf, mb.len - 1); +} +#ifdef MG_MODULE_LINES +#line 1 "mongoose/src/mqtt.c" +#endif +/* + * Copyright (c) 2014 Cesanta Software Limited + * All rights reserved + */ + +#if MG_ENABLE_MQTT + +#include <string.h> + +/* Amalgamated: #include "mongoose/src/internal.h" */ +/* Amalgamated: #include "mongoose/src/mqtt.h" */ + +static uint16_t getu16(const char *p) { + const uint8_t *up = (const uint8_t *) p; + return (up[0] << 8) + up[1]; +} + +static const char *scanto(const char *p, struct mg_str *s) { + s->len = getu16(p); + s->p = p + 2; + return s->p + s->len; +} + +MG_INTERNAL int parse_mqtt(struct mbuf *io, struct mg_mqtt_message *mm) { + uint8_t header; + size_t len = 0, len_len = 0; + const char *p, *end; + unsigned char lc = 0; + int cmd; + + if (io->len < 2) return MG_MQTT_ERROR_INCOMPLETE_MSG; + header = io->buf[0]; + cmd = header >> 4; + + /* decode mqtt variable length */ + len = len_len = 0; + p = io->buf + 1; + while ((size_t)(p - io->buf) < io->len) { + lc = *((const unsigned char *) p++); + len += (lc & 0x7f) << 7 * len_len; + len_len++; + if (!(lc & 0x80)) break; + if (len_len > 4) return MG_MQTT_ERROR_MALFORMED_MSG; + } + + end = p + len; + if (lc & 0x80 || len > (io->len - (p - io->buf))) { + return MG_MQTT_ERROR_INCOMPLETE_MSG; + } + + mm->cmd = cmd; + mm->qos = MG_MQTT_GET_QOS(header); + + switch (cmd) { + case MG_MQTT_CMD_CONNECT: { + p = scanto(p, &mm->protocol_name); + if (p > end - 4) return MG_MQTT_ERROR_MALFORMED_MSG; + mm->protocol_version = *(uint8_t *) p++; + mm->connect_flags = *(uint8_t *) p++; + mm->keep_alive_timer = getu16(p); + p += 2; + if (p >= end) return MG_MQTT_ERROR_MALFORMED_MSG; + p = scanto(p, &mm->client_id); + if (p > end) return MG_MQTT_ERROR_MALFORMED_MSG; + if (mm->connect_flags & MG_MQTT_HAS_WILL) { + if (p >= end) return MG_MQTT_ERROR_MALFORMED_MSG; + p = scanto(p, &mm->will_topic); + } + if (mm->connect_flags & MG_MQTT_HAS_WILL) { + if (p >= end) return MG_MQTT_ERROR_MALFORMED_MSG; + p = scanto(p, &mm->will_message); + } + if (mm->connect_flags & MG_MQTT_HAS_USER_NAME) { + if (p >= end) return MG_MQTT_ERROR_MALFORMED_MSG; + p = scanto(p, &mm->user_name); + } + if (mm->connect_flags & MG_MQTT_HAS_PASSWORD) { + if (p >= end) return MG_MQTT_ERROR_MALFORMED_MSG; + p = scanto(p, &mm->password); + } + if (p != end) return MG_MQTT_ERROR_MALFORMED_MSG; + + LOG(LL_DEBUG, + ("%d %2x %d proto [%.*s] client_id [%.*s] will_topic [%.*s] " + "will_msg [%.*s] user_name [%.*s] password [%.*s]", + (int) len, (int) mm->connect_flags, (int) mm->keep_alive_timer, + (int) mm->protocol_name.len, mm->protocol_name.p, + (int) mm->client_id.len, mm->client_id.p, (int) mm->will_topic.len, + mm->will_topic.p, (int) mm->will_message.len, mm->will_message.p, + (int) mm->user_name.len, mm->user_name.p, (int) mm->password.len, + mm->password.p)); + break; + } + case MG_MQTT_CMD_CONNACK: + if (end - p < 2) return MG_MQTT_ERROR_MALFORMED_MSG; + mm->connack_ret_code = p[1]; + break; + case MG_MQTT_CMD_PUBACK: + case MG_MQTT_CMD_PUBREC: + case MG_MQTT_CMD_PUBREL: + case MG_MQTT_CMD_PUBCOMP: + case MG_MQTT_CMD_SUBACK: + mm->message_id = getu16(p); + break; + case MG_MQTT_CMD_PUBLISH: { + p = scanto(p, &mm->topic); + if (p > end) return MG_MQTT_ERROR_MALFORMED_MSG; + if (mm->qos > 0) { + if (end - p < 2) return MG_MQTT_ERROR_MALFORMED_MSG; + mm->message_id = getu16(p); + p += 2; + } + mm->payload.p = p; + mm->payload.len = end - p; + break; + } + case MG_MQTT_CMD_SUBSCRIBE: + if (end - p < 2) return MG_MQTT_ERROR_MALFORMED_MSG; + mm->message_id = getu16(p); + p += 2; + /* + * topic expressions are left in the payload and can be parsed with + * `mg_mqtt_next_subscribe_topic` + */ + mm->payload.p = p; + mm->payload.len = end - p; + break; + default: + /* Unhandled command */ + break; + } + + mm->len = end - io->buf; + return mm->len; +} + +static void mqtt_handler(struct mg_connection *nc, int ev, + void *ev_data MG_UD_ARG(void *user_data)) { + struct mbuf *io = &nc->recv_mbuf; + struct mg_mqtt_message mm; + memset(&mm, 0, sizeof(mm)); + + nc->handler(nc, ev, ev_data MG_UD_ARG(user_data)); + + switch (ev) { + case MG_EV_ACCEPT: + if (nc->proto_data == NULL) mg_set_protocol_mqtt(nc); + break; + case MG_EV_RECV: { + /* There can be multiple messages in the buffer, process them all. */ + while (1) { + int len = parse_mqtt(io, &mm); + if (len < 0) { + if (len == MG_MQTT_ERROR_MALFORMED_MSG) { + /* Protocol error. */ + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + } else if (len == MG_MQTT_ERROR_INCOMPLETE_MSG) { + /* Not fully buffered, let's check if we have a chance to get more + * data later */ + if (nc->recv_mbuf_limit > 0 && + nc->recv_mbuf.len >= nc->recv_mbuf_limit) { + LOG(LL_ERROR, ("%p recv buffer (%lu bytes) exceeds the limit " + "%lu bytes, and not drained, closing", + nc, (unsigned long) nc->recv_mbuf.len, + (unsigned long) nc->recv_mbuf_limit)); + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + } + } else { + /* Should never be here */ + LOG(LL_ERROR, ("%p invalid len: %d, closing", nc, len)); + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + } + break; + } + + nc->handler(nc, MG_MQTT_EVENT_BASE + mm.cmd, &mm MG_UD_ARG(user_data)); + mbuf_remove(io, len); + } + break; + } + case MG_EV_POLL: { + struct mg_mqtt_proto_data *pd = + (struct mg_mqtt_proto_data *) nc->proto_data; + double now = mg_time(); + if (pd->keep_alive > 0 && pd->last_control_time > 0 && + (now - pd->last_control_time) > pd->keep_alive) { + LOG(LL_DEBUG, ("Send PINGREQ")); + mg_mqtt_ping(nc); + } + break; + } + } +} + +static void mg_mqtt_proto_data_destructor(void *proto_data) { + MG_FREE(proto_data); +} + +int mg_mqtt_match_topic_expression(struct mg_str exp, struct mg_str topic) { + /* TODO(mkm): implement real matching */ + if (memchr(exp.p, '#', exp.len)) { + /* exp `foo/#` will become `foo/` */ + exp.len -= 1; + /* + * topic should be longer than the expression: e.g. topic `foo/bar` does + * match `foo/#`, but neither `foo` nor `foo/` do. + */ + if (topic.len <= exp.len) { + return 0; + } + + /* Truncate topic so that it'll pass the next length check */ + topic.len = exp.len; + } + if (topic.len != exp.len) { + return 0; + } + return strncmp(topic.p, exp.p, exp.len) == 0; +} + +int mg_mqtt_vmatch_topic_expression(const char *exp, struct mg_str topic) { + return mg_mqtt_match_topic_expression(mg_mk_str(exp), topic); +} + +void mg_set_protocol_mqtt(struct mg_connection *nc) { + nc->proto_handler = mqtt_handler; + nc->proto_data = MG_CALLOC(1, sizeof(struct mg_mqtt_proto_data)); + nc->proto_data_destructor = mg_mqtt_proto_data_destructor; +} + +static void mg_mqtt_prepend_header(struct mg_connection *nc, uint8_t cmd, + uint8_t flags, size_t len) { + struct mg_mqtt_proto_data *pd = (struct mg_mqtt_proto_data *) nc->proto_data; + size_t off = nc->send_mbuf.len - len; + uint8_t header = cmd << 4 | (uint8_t) flags; + + uint8_t buf[1 + sizeof(size_t)]; + uint8_t *vlen = &buf[1]; + + assert(nc->send_mbuf.len >= len); + + buf[0] = header; + + /* mqtt variable length encoding */ + do { + *vlen = len % 0x80; + len /= 0x80; + if (len > 0) *vlen |= 0x80; + vlen++; + } while (len > 0); + + mbuf_insert(&nc->send_mbuf, off, buf, vlen - buf); + pd->last_control_time = mg_time(); +} + +void mg_send_mqtt_handshake(struct mg_connection *nc, const char *client_id) { + static struct mg_send_mqtt_handshake_opts opts; + mg_send_mqtt_handshake_opt(nc, client_id, opts); +} + +void mg_send_mqtt_handshake_opt(struct mg_connection *nc, const char *client_id, + struct mg_send_mqtt_handshake_opts opts) { + uint16_t hlen, nlen, rem_len = 0; + struct mg_mqtt_proto_data *pd = (struct mg_mqtt_proto_data *) nc->proto_data; + + mg_send(nc, "\00\04MQTT\04", 7); + rem_len += 7; + + if (opts.user_name != NULL) { + opts.flags |= MG_MQTT_HAS_USER_NAME; + } + if (opts.password != NULL) { + opts.flags |= MG_MQTT_HAS_PASSWORD; + } + if (opts.will_topic != NULL && opts.will_message != NULL) { + opts.flags |= MG_MQTT_HAS_WILL; + } + if (opts.keep_alive == 0) { + opts.keep_alive = 60; + } + + mg_send(nc, &opts.flags, 1); + rem_len += 1; + + nlen = htons(opts.keep_alive); + mg_send(nc, &nlen, 2); + rem_len += 2; + + hlen = strlen(client_id); + nlen = htons((uint16_t) hlen); + mg_send(nc, &nlen, 2); + mg_send(nc, client_id, hlen); + rem_len += 2 + hlen; + + if (opts.flags & MG_MQTT_HAS_WILL) { + hlen = strlen(opts.will_topic); + nlen = htons((uint16_t) hlen); + mg_send(nc, &nlen, 2); + mg_send(nc, opts.will_topic, hlen); + rem_len += 2 + hlen; + + hlen = strlen(opts.will_message); + nlen = htons((uint16_t) hlen); + mg_send(nc, &nlen, 2); + mg_send(nc, opts.will_message, hlen); + rem_len += 2 + hlen; + } + + if (opts.flags & MG_MQTT_HAS_USER_NAME) { + hlen = strlen(opts.user_name); + nlen = htons((uint16_t) hlen); + mg_send(nc, &nlen, 2); + mg_send(nc, opts.user_name, hlen); + rem_len += 2 + hlen; + } + if (opts.flags & MG_MQTT_HAS_PASSWORD) { + hlen = strlen(opts.password); + nlen = htons((uint16_t) hlen); + mg_send(nc, &nlen, 2); + mg_send(nc, opts.password, hlen); + rem_len += 2 + hlen; + } + + mg_mqtt_prepend_header(nc, MG_MQTT_CMD_CONNECT, 0, rem_len); + + if (pd != NULL) { + pd->keep_alive = opts.keep_alive; + } +} + +void mg_mqtt_publish(struct mg_connection *nc, const char *topic, + uint16_t message_id, int flags, const void *data, + size_t len) { + size_t old_len = nc->send_mbuf.len; + + uint16_t topic_len = htons((uint16_t) strlen(topic)); + uint16_t message_id_net = htons(message_id); + + mg_send(nc, &topic_len, 2); + mg_send(nc, topic, strlen(topic)); + if (MG_MQTT_GET_QOS(flags) > 0) { + mg_send(nc, &message_id_net, 2); + } + mg_send(nc, data, len); + + mg_mqtt_prepend_header(nc, MG_MQTT_CMD_PUBLISH, flags, + nc->send_mbuf.len - old_len); +} + +void mg_mqtt_subscribe(struct mg_connection *nc, + const struct mg_mqtt_topic_expression *topics, + size_t topics_len, uint16_t message_id) { + size_t old_len = nc->send_mbuf.len; + + uint16_t message_id_n = htons(message_id); + size_t i; + + mg_send(nc, (char *) &message_id_n, 2); + for (i = 0; i < topics_len; i++) { + uint16_t topic_len_n = htons((uint16_t) strlen(topics[i].topic)); + mg_send(nc, &topic_len_n, 2); + mg_send(nc, topics[i].topic, strlen(topics[i].topic)); + mg_send(nc, &topics[i].qos, 1); + } + + mg_mqtt_prepend_header(nc, MG_MQTT_CMD_SUBSCRIBE, MG_MQTT_QOS(1), + nc->send_mbuf.len - old_len); +} + +int mg_mqtt_next_subscribe_topic(struct mg_mqtt_message *msg, + struct mg_str *topic, uint8_t *qos, int pos) { + unsigned char *buf = (unsigned char *) msg->payload.p + pos; + int new_pos; + + if ((size_t) pos >= msg->payload.len) return -1; + + topic->len = buf[0] << 8 | buf[1]; + topic->p = (char *) buf + 2; + new_pos = pos + 2 + topic->len + 1; + if ((size_t) new_pos > msg->payload.len) return -1; + *qos = buf[2 + topic->len]; + return new_pos; +} + +void mg_mqtt_unsubscribe(struct mg_connection *nc, char **topics, + size_t topics_len, uint16_t message_id) { + size_t old_len = nc->send_mbuf.len; + + uint16_t message_id_n = htons(message_id); + size_t i; + + mg_send(nc, (char *) &message_id_n, 2); + for (i = 0; i < topics_len; i++) { + uint16_t topic_len_n = htons((uint16_t) strlen(topics[i])); + mg_send(nc, &topic_len_n, 2); + mg_send(nc, topics[i], strlen(topics[i])); + } + + mg_mqtt_prepend_header(nc, MG_MQTT_CMD_UNSUBSCRIBE, MG_MQTT_QOS(1), + nc->send_mbuf.len - old_len); +} + +void mg_mqtt_connack(struct mg_connection *nc, uint8_t return_code) { + uint8_t unused = 0; + mg_send(nc, &unused, 1); + mg_send(nc, &return_code, 1); + mg_mqtt_prepend_header(nc, MG_MQTT_CMD_CONNACK, 0, 2); +} + +/* + * Sends a command which contains only a `message_id` and a QoS level of 1. + * + * Helper function. + */ +static void mg_send_mqtt_short_command(struct mg_connection *nc, uint8_t cmd, + uint16_t message_id) { + uint16_t message_id_net = htons(message_id); + uint8_t flags = (cmd == MG_MQTT_CMD_PUBREL ? 2 : 0); + mg_send(nc, &message_id_net, 2); + mg_mqtt_prepend_header(nc, cmd, flags, 2 /* len */); +} + +void mg_mqtt_puback(struct mg_connection *nc, uint16_t message_id) { + mg_send_mqtt_short_command(nc, MG_MQTT_CMD_PUBACK, message_id); +} + +void mg_mqtt_pubrec(struct mg_connection *nc, uint16_t message_id) { + mg_send_mqtt_short_command(nc, MG_MQTT_CMD_PUBREC, message_id); +} + +void mg_mqtt_pubrel(struct mg_connection *nc, uint16_t message_id) { + mg_send_mqtt_short_command(nc, MG_MQTT_CMD_PUBREL, message_id); +} + +void mg_mqtt_pubcomp(struct mg_connection *nc, uint16_t message_id) { + mg_send_mqtt_short_command(nc, MG_MQTT_CMD_PUBCOMP, message_id); +} + +void mg_mqtt_suback(struct mg_connection *nc, uint8_t *qoss, size_t qoss_len, + uint16_t message_id) { + size_t i; + uint16_t message_id_net = htons(message_id); + mg_send(nc, &message_id_net, 2); + for (i = 0; i < qoss_len; i++) { + mg_send(nc, &qoss[i], 1); + } + mg_mqtt_prepend_header(nc, MG_MQTT_CMD_SUBACK, MG_MQTT_QOS(1), 2 + qoss_len); +} + +void mg_mqtt_unsuback(struct mg_connection *nc, uint16_t message_id) { + mg_send_mqtt_short_command(nc, MG_MQTT_CMD_UNSUBACK, message_id); +} + +void mg_mqtt_ping(struct mg_connection *nc) { + mg_mqtt_prepend_header(nc, MG_MQTT_CMD_PINGREQ, 0, 0); +} + +void mg_mqtt_pong(struct mg_connection *nc) { + mg_mqtt_prepend_header(nc, MG_MQTT_CMD_PINGRESP, 0, 0); +} + +void mg_mqtt_disconnect(struct mg_connection *nc) { + mg_mqtt_prepend_header(nc, MG_MQTT_CMD_DISCONNECT, 0, 0); +} + +#endif /* MG_ENABLE_MQTT */ +#ifdef MG_MODULE_LINES +#line 1 "mongoose/src/mqtt_server.c" +#endif +/* + * Copyright (c) 2014 Cesanta Software Limited + * All rights reserved + */ + +/* Amalgamated: #include "mongoose/src/internal.h" */ +/* Amalgamated: #include "mongoose/src/mqtt-server.h" */ + +#if MG_ENABLE_MQTT_BROKER + +static void mg_mqtt_session_init(struct mg_mqtt_broker *brk, + struct mg_mqtt_session *s, + struct mg_connection *nc) { + s->brk = brk; + s->subscriptions = NULL; + s->num_subscriptions = 0; + s->nc = nc; +} + +static void mg_mqtt_add_session(struct mg_mqtt_session *s) { + LIST_INSERT_HEAD(&s->brk->sessions, s, link); +} + +static void mg_mqtt_remove_session(struct mg_mqtt_session *s) { + LIST_REMOVE(s, link); +} + +static void mg_mqtt_destroy_session(struct mg_mqtt_session *s) { + size_t i; + for (i = 0; i < s->num_subscriptions; i++) { + MG_FREE((void *) s->subscriptions[i].topic); + } + MG_FREE(s->subscriptions); + MG_FREE(s); +} + +static void mg_mqtt_close_session(struct mg_mqtt_session *s) { + mg_mqtt_remove_session(s); + mg_mqtt_destroy_session(s); +} + +void mg_mqtt_broker_init(struct mg_mqtt_broker *brk, void *user_data) { + LIST_INIT(&brk->sessions); + brk->user_data = user_data; +} + +static void mg_mqtt_broker_handle_connect(struct mg_mqtt_broker *brk, + struct mg_connection *nc) { + struct mg_mqtt_session *s = + (struct mg_mqtt_session *) MG_CALLOC(1, sizeof *s); + if (s == NULL) { + /* LCOV_EXCL_START */ + mg_mqtt_connack(nc, MG_EV_MQTT_CONNACK_SERVER_UNAVAILABLE); + return; + /* LCOV_EXCL_STOP */ + } + + /* TODO(mkm): check header (magic and version) */ + + mg_mqtt_session_init(brk, s, nc); + s->user_data = nc->user_data; + nc->user_data = s; + mg_mqtt_add_session(s); + + mg_mqtt_connack(nc, MG_EV_MQTT_CONNACK_ACCEPTED); +} + +static void mg_mqtt_broker_handle_subscribe(struct mg_connection *nc, + struct mg_mqtt_message *msg) { + struct mg_mqtt_session *ss = (struct mg_mqtt_session *) nc->user_data; + uint8_t qoss[MG_MQTT_MAX_SESSION_SUBSCRIPTIONS]; + size_t num_subs = 0; + struct mg_str topic; + uint8_t qos; + int pos; + struct mg_mqtt_topic_expression *te; + + for (pos = 0; + (pos = mg_mqtt_next_subscribe_topic(msg, &topic, &qos, pos)) != -1;) { + if (num_subs >= sizeof(MG_MQTT_MAX_SESSION_SUBSCRIPTIONS) || + (ss->num_subscriptions + num_subs >= + MG_MQTT_MAX_SESSION_SUBSCRIPTIONS)) { + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + return; + } + qoss[num_subs++] = qos; + } + + if (num_subs > 0) { + te = (struct mg_mqtt_topic_expression *) MG_REALLOC( + ss->subscriptions, + sizeof(*ss->subscriptions) * (ss->num_subscriptions + num_subs)); + if (te == NULL) { + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + return; + } + ss->subscriptions = te; + for (pos = 0; + pos < (int) msg->payload.len && + (pos = mg_mqtt_next_subscribe_topic(msg, &topic, &qos, pos)) != -1; + ss->num_subscriptions++) { + te = &ss->subscriptions[ss->num_subscriptions]; + te->topic = (char *) MG_MALLOC(topic.len + 1); + te->qos = qos; + memcpy((char *) te->topic, topic.p, topic.len); + ((char *) te->topic)[topic.len] = '\0'; + } + } + + if (pos == (int) msg->payload.len) { + mg_mqtt_suback(nc, qoss, num_subs, msg->message_id); + } else { + /* We did not fully parse the payload, something must be wrong. */ + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + } +} + +static void mg_mqtt_broker_handle_publish(struct mg_mqtt_broker *brk, + struct mg_mqtt_message *msg) { + struct mg_mqtt_session *s; + size_t i; + + for (s = mg_mqtt_next(brk, NULL); s != NULL; s = mg_mqtt_next(brk, s)) { + for (i = 0; i < s->num_subscriptions; i++) { + if (mg_mqtt_vmatch_topic_expression(s->subscriptions[i].topic, + msg->topic)) { + char buf[100], *p = buf; + mg_asprintf(&p, sizeof(buf), "%.*s", (int) msg->topic.len, + msg->topic.p); + if (p == NULL) { + return; + } + mg_mqtt_publish(s->nc, p, 0, 0, msg->payload.p, msg->payload.len); + if (p != buf) { + MG_FREE(p); + } + break; + } + } + } +} + +void mg_mqtt_broker(struct mg_connection *nc, int ev, void *data) { + struct mg_mqtt_message *msg = (struct mg_mqtt_message *) data; + struct mg_mqtt_broker *brk; + + if (nc->listener) { + brk = (struct mg_mqtt_broker *) nc->listener->user_data; + } else { + brk = (struct mg_mqtt_broker *) nc->user_data; + } + + switch (ev) { + case MG_EV_ACCEPT: + if (nc->proto_data == NULL) mg_set_protocol_mqtt(nc); + nc->user_data = NULL; /* Clear up the inherited pointer to broker */ + break; + case MG_EV_MQTT_CONNECT: + if (nc->user_data == NULL) { + mg_mqtt_broker_handle_connect(brk, nc); + } else { + /* Repeated CONNECT */ + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + } + break; + case MG_EV_MQTT_SUBSCRIBE: + if (nc->user_data != NULL) { + mg_mqtt_broker_handle_subscribe(nc, msg); + } else { + /* Subscribe before CONNECT */ + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + } + break; + case MG_EV_MQTT_PUBLISH: + if (nc->user_data != NULL) { + mg_mqtt_broker_handle_publish(brk, msg); + } else { + /* Publish before CONNECT */ + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + } + break; + case MG_EV_CLOSE: + if (nc->listener && nc->user_data != NULL) { + mg_mqtt_close_session((struct mg_mqtt_session *) nc->user_data); + } + break; + } +} + +struct mg_mqtt_session *mg_mqtt_next(struct mg_mqtt_broker *brk, + struct mg_mqtt_session *s) { + return s == NULL ? LIST_FIRST(&brk->sessions) : LIST_NEXT(s, link); +} + +#endif /* MG_ENABLE_MQTT_BROKER */ +#ifdef MG_MODULE_LINES +#line 1 "mongoose/src/dns.c" +#endif +/* + * Copyright (c) 2014 Cesanta Software Limited + * All rights reserved + */ + +#if MG_ENABLE_DNS + +/* Amalgamated: #include "mongoose/src/internal.h" */ +/* Amalgamated: #include "mongoose/src/dns.h" */ + +static int mg_dns_tid = 0xa0; + +struct mg_dns_header { + uint16_t transaction_id; + uint16_t flags; + uint16_t num_questions; + uint16_t num_answers; + uint16_t num_authority_prs; + uint16_t num_other_prs; +}; + +struct mg_dns_resource_record *mg_dns_next_record( + struct mg_dns_message *msg, int query, + struct mg_dns_resource_record *prev) { + struct mg_dns_resource_record *rr; + + for (rr = (prev == NULL ? msg->answers : prev + 1); + rr - msg->answers < msg->num_answers; rr++) { + if (rr->rtype == query) { + return rr; + } + } + return NULL; +} + +int mg_dns_parse_record_data(struct mg_dns_message *msg, + struct mg_dns_resource_record *rr, void *data, + size_t data_len) { + switch (rr->rtype) { + case MG_DNS_A_RECORD: + if (data_len < sizeof(struct in_addr)) { + return -1; + } + if (rr->rdata.p + data_len > msg->pkt.p + msg->pkt.len) { + return -1; + } + memcpy(data, rr->rdata.p, data_len); + return 0; +#if MG_ENABLE_IPV6 + case MG_DNS_AAAA_RECORD: + if (data_len < sizeof(struct in6_addr)) { + return -1; /* LCOV_EXCL_LINE */ + } + memcpy(data, rr->rdata.p, data_len); + return 0; +#endif + case MG_DNS_CNAME_RECORD: + mg_dns_uncompress_name(msg, &rr->rdata, (char *) data, data_len); + return 0; + } + + return -1; +} + +int mg_dns_insert_header(struct mbuf *io, size_t pos, + struct mg_dns_message *msg) { + struct mg_dns_header header; + + memset(&header, 0, sizeof(header)); + header.transaction_id = msg->transaction_id; + header.flags = htons(msg->flags); + header.num_questions = htons(msg->num_questions); + header.num_answers = htons(msg->num_answers); + + return mbuf_insert(io, pos, &header, sizeof(header)); +} + +int mg_dns_copy_questions(struct mbuf *io, struct mg_dns_message *msg) { + unsigned char *begin, *end; + struct mg_dns_resource_record *last_q; + if (msg->num_questions <= 0) return 0; + begin = (unsigned char *) msg->pkt.p + sizeof(struct mg_dns_header); + last_q = &msg->questions[msg->num_questions - 1]; + end = (unsigned char *) last_q->name.p + last_q->name.len + 4; + return mbuf_append(io, begin, end - begin); +} + +int mg_dns_encode_name(struct mbuf *io, const char *name, size_t len) { + const char *s; + unsigned char n; + size_t pos = io->len; + + do { + if ((s = strchr(name, '.')) == NULL) { + s = name + len; + } + + if (s - name > 127) { + return -1; /* TODO(mkm) cover */ + } + n = s - name; /* chunk length */ + mbuf_append(io, &n, 1); /* send length */ + mbuf_append(io, name, n); + + if (*s == '.') { + n++; + } + + name += n; + len -= n; + } while (*s != '\0'); + mbuf_append(io, "\0", 1); /* Mark end of host name */ + + return io->len - pos; +} + +int mg_dns_encode_record(struct mbuf *io, struct mg_dns_resource_record *rr, + const char *name, size_t nlen, const void *rdata, + size_t rlen) { + size_t pos = io->len; + uint16_t u16; + uint32_t u32; + + if (rr->kind == MG_DNS_INVALID_RECORD) { + return -1; /* LCOV_EXCL_LINE */ + } + + if (mg_dns_encode_name(io, name, nlen) == -1) { + return -1; + } + + u16 = htons(rr->rtype); + mbuf_append(io, &u16, 2); + u16 = htons(rr->rclass); + mbuf_append(io, &u16, 2); + + if (rr->kind == MG_DNS_ANSWER) { + u32 = htonl(rr->ttl); + mbuf_append(io, &u32, 4); + + if (rr->rtype == MG_DNS_CNAME_RECORD) { + int clen; + /* fill size after encoding */ + size_t off = io->len; + mbuf_append(io, &u16, 2); + if ((clen = mg_dns_encode_name(io, (const char *) rdata, rlen)) == -1) { + return -1; + } + u16 = clen; + io->buf[off] = u16 >> 8; + io->buf[off + 1] = u16 & 0xff; + } else { + u16 = htons((uint16_t) rlen); + mbuf_append(io, &u16, 2); + mbuf_append(io, rdata, rlen); + } + } + + return io->len - pos; +} + +void mg_send_dns_query(struct mg_connection *nc, const char *name, + int query_type) { + struct mg_dns_message *msg = + (struct mg_dns_message *) MG_CALLOC(1, sizeof(*msg)); + struct mbuf pkt; + struct mg_dns_resource_record *rr = &msg->questions[0]; + + DBG(("%s %d", name, query_type)); + + mbuf_init(&pkt, 64 /* Start small, it'll grow as needed. */); + + msg->transaction_id = ++mg_dns_tid; + msg->flags = 0x100; + msg->num_questions = 1; + + mg_dns_insert_header(&pkt, 0, msg); + + rr->rtype = query_type; + rr->rclass = 1; /* Class: inet */ + rr->kind = MG_DNS_QUESTION; + + if (mg_dns_encode_record(&pkt, rr, name, strlen(name), NULL, 0) == -1) { + /* TODO(mkm): return an error code */ + goto cleanup; /* LCOV_EXCL_LINE */ + } + + /* TCP DNS requires messages to be prefixed with len */ + if (!(nc->flags & MG_F_UDP)) { + uint16_t len = htons((uint16_t) pkt.len); + mbuf_insert(&pkt, 0, &len, 2); + } + + mg_send(nc, pkt.buf, pkt.len); + mbuf_free(&pkt); + +cleanup: + MG_FREE(msg); +} + +static unsigned char *mg_parse_dns_resource_record( + unsigned char *data, unsigned char *end, struct mg_dns_resource_record *rr, + int reply) { + unsigned char *name = data; + int chunk_len, data_len; + + while (data < end && (chunk_len = *data)) { + if (((unsigned char *) data)[0] & 0xc0) { + data += 1; + break; + } + data += chunk_len + 1; + } + + if (data > end - 5) { + return NULL; + } + + rr->name.p = (char *) name; + rr->name.len = data - name + 1; + data++; + + rr->rtype = data[0] << 8 | data[1]; + data += 2; + + rr->rclass = data[0] << 8 | data[1]; + data += 2; + + rr->kind = reply ? MG_DNS_ANSWER : MG_DNS_QUESTION; + if (reply) { + if (data >= end - 6) { + return NULL; + } + + rr->ttl = (uint32_t) data[0] << 24 | (uint32_t) data[1] << 16 | + data[2] << 8 | data[3]; + data += 4; + + data_len = *data << 8 | *(data + 1); + data += 2; + + rr->rdata.p = (char *) data; + rr->rdata.len = data_len; + data += data_len; + } + return data; +} + +int mg_parse_dns(const char *buf, int len, struct mg_dns_message *msg) { + struct mg_dns_header *header = (struct mg_dns_header *) buf; + unsigned char *data = (unsigned char *) buf + sizeof(*header); + unsigned char *end = (unsigned char *) buf + len; + int i; + + memset(msg, 0, sizeof(*msg)); + msg->pkt.p = buf; + msg->pkt.len = len; + + if (len < (int) sizeof(*header)) return -1; + + msg->transaction_id = header->transaction_id; + msg->flags = ntohs(header->flags); + msg->num_questions = ntohs(header->num_questions); + if (msg->num_questions > (int) ARRAY_SIZE(msg->questions)) { + msg->num_questions = (int) ARRAY_SIZE(msg->questions); + } + msg->num_answers = ntohs(header->num_answers); + if (msg->num_answers > (int) ARRAY_SIZE(msg->answers)) { + msg->num_answers = (int) ARRAY_SIZE(msg->answers); + } + + for (i = 0; i < msg->num_questions; i++) { + data = mg_parse_dns_resource_record(data, end, &msg->questions[i], 0); + if (data == NULL) return -1; + } + + for (i = 0; i < msg->num_answers; i++) { + data = mg_parse_dns_resource_record(data, end, &msg->answers[i], 1); + if (data == NULL) return -1; + } + + return 0; +} + +size_t mg_dns_uncompress_name(struct mg_dns_message *msg, struct mg_str *name, + char *dst, int dst_len) { + int chunk_len, num_ptrs = 0; + char *old_dst = dst; + const unsigned char *data = (unsigned char *) name->p; + const unsigned char *end = (unsigned char *) msg->pkt.p + msg->pkt.len; + + if (data >= end) { + return 0; + } + + while ((chunk_len = *data++)) { + int leeway = dst_len - (dst - old_dst); + if (data >= end) { + return 0; + } + + if ((chunk_len & 0xc0) == 0xc0) { + uint16_t off = (data[-1] & (~0xc0)) << 8 | data[0]; + if (off >= msg->pkt.len) { + return 0; + } + /* Basic circular loop avoidance: allow up to 16 pointer hops. */ + if (++num_ptrs > 15) { + return 0; + } + data = (unsigned char *) msg->pkt.p + off; + continue; + } + if (chunk_len > 63) { + return 0; + } + if (chunk_len > leeway) { + chunk_len = leeway; + } + + if (data + chunk_len >= end) { + return 0; + } + + memcpy(dst, data, chunk_len); + data += chunk_len; + dst += chunk_len; + leeway -= chunk_len; + if (leeway == 0) { + return dst - old_dst; + } + *dst++ = '.'; + } + + if (dst != old_dst) { + *--dst = 0; + } + return dst - old_dst; +} + +static void dns_handler(struct mg_connection *nc, int ev, + void *ev_data MG_UD_ARG(void *user_data)) { + struct mbuf *io = &nc->recv_mbuf; + struct mg_dns_message msg; + + /* Pass low-level events to the user handler */ + nc->handler(nc, ev, ev_data MG_UD_ARG(user_data)); + + switch (ev) { + case MG_EV_RECV: + if (!(nc->flags & MG_F_UDP)) { + mbuf_remove(&nc->recv_mbuf, 2); + } + if (mg_parse_dns(nc->recv_mbuf.buf, nc->recv_mbuf.len, &msg) == -1) { + /* reply + recursion allowed + format error */ + memset(&msg, 0, sizeof(msg)); + msg.flags = 0x8081; + mg_dns_insert_header(io, 0, &msg); + if (!(nc->flags & MG_F_UDP)) { + uint16_t len = htons((uint16_t) io->len); + mbuf_insert(io, 0, &len, 2); + } + mg_send(nc, io->buf, io->len); + } else { + /* Call user handler with parsed message */ + nc->handler(nc, MG_DNS_MESSAGE, &msg MG_UD_ARG(user_data)); + } + mbuf_remove(io, io->len); + break; + } +} + +void mg_set_protocol_dns(struct mg_connection *nc) { + nc->proto_handler = dns_handler; +} + +#endif /* MG_ENABLE_DNS */ +#ifdef MG_MODULE_LINES +#line 1 "mongoose/src/dns_server.c" +#endif +/* + * Copyright (c) 2014 Cesanta Software Limited + * All rights reserved + */ + +#if MG_ENABLE_DNS_SERVER + +/* Amalgamated: #include "mongoose/src/internal.h" */ +/* Amalgamated: #include "mongoose/src/dns-server.h" */ + +struct mg_dns_reply mg_dns_create_reply(struct mbuf *io, + struct mg_dns_message *msg) { + struct mg_dns_reply rep; + rep.msg = msg; + rep.io = io; + rep.start = io->len; + + /* reply + recursion allowed */ + msg->flags |= 0x8080; + mg_dns_copy_questions(io, msg); + + msg->num_answers = 0; + return rep; +} + +void mg_dns_send_reply(struct mg_connection *nc, struct mg_dns_reply *r) { + size_t sent = r->io->len - r->start; + mg_dns_insert_header(r->io, r->start, r->msg); + if (!(nc->flags & MG_F_UDP)) { + uint16_t len = htons((uint16_t) sent); + mbuf_insert(r->io, r->start, &len, 2); + } + + if (&nc->send_mbuf != r->io) { + mg_send(nc, r->io->buf + r->start, r->io->len - r->start); + r->io->len = r->start; + } +} + +int mg_dns_reply_record(struct mg_dns_reply *reply, + struct mg_dns_resource_record *question, + const char *name, int rtype, int ttl, const void *rdata, + size_t rdata_len) { + struct mg_dns_message *msg = (struct mg_dns_message *) reply->msg; + char rname[512]; + struct mg_dns_resource_record *ans = &msg->answers[msg->num_answers]; + if (msg->num_answers >= MG_MAX_DNS_ANSWERS) { + return -1; /* LCOV_EXCL_LINE */ + } + + if (name == NULL) { + name = rname; + rname[511] = 0; + mg_dns_uncompress_name(msg, &question->name, rname, sizeof(rname) - 1); + } + + *ans = *question; + ans->kind = MG_DNS_ANSWER; + ans->rtype = rtype; + ans->ttl = ttl; + + if (mg_dns_encode_record(reply->io, ans, name, strlen(name), rdata, + rdata_len) == -1) { + return -1; /* LCOV_EXCL_LINE */ + }; + + msg->num_answers++; + return 0; +} + +#endif /* MG_ENABLE_DNS_SERVER */ +#ifdef MG_MODULE_LINES +#line 1 "mongoose/src/resolv.c" +#endif +/* + * Copyright (c) 2014 Cesanta Software Limited + * All rights reserved + */ + +#if MG_ENABLE_ASYNC_RESOLVER + +/* Amalgamated: #include "mongoose/src/internal.h" */ +/* Amalgamated: #include "mongoose/src/resolv.h" */ + +#ifndef MG_DEFAULT_NAMESERVER +#define MG_DEFAULT_NAMESERVER "8.8.8.8" +#endif + +struct mg_resolve_async_request { + char name[1024]; + int query; + mg_resolve_callback_t callback; + void *data; + time_t timeout; + int max_retries; + enum mg_resolve_err err; + + /* state */ + time_t last_time; + int retries; +}; + +/* + * Find what nameserver to use. + * + * Return 0 if OK, -1 if error + */ +static int mg_get_ip_address_of_nameserver(char *name, size_t name_len) { + int ret = -1; + +#ifdef _WIN32 + int i; + LONG err; + HKEY hKey, hSub; + wchar_t subkey[512], value[128], + *key = L"SYSTEM\\ControlSet001\\Services\\Tcpip\\Parameters\\Interfaces"; + + if ((err = RegOpenKeyExW(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, &hKey)) != + ERROR_SUCCESS) { + fprintf(stderr, "cannot open reg key %S: %ld\n", key, err); + ret = -1; + } else { + for (ret = -1, i = 0; 1; i++) { + DWORD subkey_size = sizeof(subkey), type, len = sizeof(value); + if (RegEnumKeyExW(hKey, i, subkey, &subkey_size, NULL, NULL, NULL, + NULL) != ERROR_SUCCESS) { + break; + } + if (RegOpenKeyExW(hKey, subkey, 0, KEY_READ, &hSub) == ERROR_SUCCESS && + ((RegQueryValueExW(hSub, L"NameServer", 0, &type, (void *) value, + &len) == ERROR_SUCCESS && + value[0] != '\0') || + (RegQueryValueExW(hSub, L"DhcpNameServer", 0, &type, (void *) value, + &len) == ERROR_SUCCESS && + value[0] != '\0'))) { + /* + * See https://github.com/cesanta/mongoose/issues/176 + * The value taken from the registry can be empty, a single + * IP address, or multiple IP addresses separated by comma. + * If it's empty, check the next interface. + * If it's multiple IP addresses, take the first one. + */ + wchar_t *comma = wcschr(value, ','); + if (comma != NULL) { + *comma = '\0'; + } + /* %S will convert wchar_t -> char */ + snprintf(name, name_len, "%S", value); + ret = 0; + RegCloseKey(hSub); + break; + } + } + RegCloseKey(hKey); + } +#elif MG_ENABLE_FILESYSTEM && defined(MG_RESOLV_CONF_FILE_NAME) + FILE *fp; + char line[512]; + + if ((fp = mg_fopen(MG_RESOLV_CONF_FILE_NAME, "r")) == NULL) { + ret = -1; + } else { + /* Try to figure out what nameserver to use */ + for (ret = -1; fgets(line, sizeof(line), fp) != NULL;) { + unsigned int a, b, c, d; + if (sscanf(line, "nameserver %u.%u.%u.%u", &a, &b, &c, &d) == 4) { + snprintf(name, name_len, "%u.%u.%u.%u", a, b, c, d); + ret = 0; + break; + } + } + (void) fclose(fp); + } +#else + snprintf(name, name_len, "%s", MG_DEFAULT_NAMESERVER); +#endif /* _WIN32 */ + + return ret; +} + +int mg_resolve_from_hosts_file(const char *name, union socket_address *usa) { +#if MG_ENABLE_FILESYSTEM && defined(MG_HOSTS_FILE_NAME) + /* TODO(mkm) cache /etc/hosts */ + FILE *fp; + char line[1024]; + char *p; + char alias[256]; + unsigned int a, b, c, d; + int len = 0; + + if ((fp = mg_fopen(MG_HOSTS_FILE_NAME, "r")) == NULL) { + return -1; + } + + for (; fgets(line, sizeof(line), fp) != NULL;) { + if (line[0] == '#') continue; + + if (sscanf(line, "%u.%u.%u.%u%n", &a, &b, &c, &d, &len) == 0) { + /* TODO(mkm): handle ipv6 */ + continue; + } + for (p = line + len; sscanf(p, "%s%n", alias, &len) == 1; p += len) { + if (strcmp(alias, name) == 0) { + usa->sin.sin_addr.s_addr = htonl(a << 24 | b << 16 | c << 8 | d); + fclose(fp); + return 0; + } + } + } + + fclose(fp); +#else + (void) name; + (void) usa; +#endif + + return -1; +} + +static void mg_resolve_async_eh(struct mg_connection *nc, int ev, + void *data MG_UD_ARG(void *user_data)) { + time_t now = (time_t) mg_time(); + struct mg_resolve_async_request *req; + struct mg_dns_message *msg; + int first = 0; +#if !MG_ENABLE_CALLBACK_USERDATA + void *user_data = nc->user_data; +#endif + + if (ev != MG_EV_POLL) DBG(("ev=%d user_data=%p", ev, user_data)); + + req = (struct mg_resolve_async_request *) user_data; + + if (req == NULL) { + return; + } + + switch (ev) { + case MG_EV_CONNECT: + /* don't depend on timer not being at epoch for sending out first req */ + first = 1; + /* fallthrough */ + case MG_EV_POLL: + if (req->retries > req->max_retries) { + req->err = MG_RESOLVE_EXCEEDED_RETRY_COUNT; + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + break; + } + if (first || now - req->last_time >= req->timeout) { + mg_send_dns_query(nc, req->name, req->query); + req->last_time = now; + req->retries++; + } + break; + case MG_EV_RECV: + msg = (struct mg_dns_message *) MG_MALLOC(sizeof(*msg)); + if (mg_parse_dns(nc->recv_mbuf.buf, *(int *) data, msg) == 0 && + msg->num_answers > 0) { + req->callback(msg, req->data, MG_RESOLVE_OK); + nc->user_data = NULL; + MG_FREE(req); + } else { + req->err = MG_RESOLVE_NO_ANSWERS; + } + MG_FREE(msg); + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + break; + case MG_EV_SEND: + /* + * If a send error occurs, prevent closing of the connection by the core. + * We will retry after timeout. + */ + nc->flags &= ~MG_F_CLOSE_IMMEDIATELY; + mbuf_remove(&nc->send_mbuf, nc->send_mbuf.len); + break; + case MG_EV_TIMER: + req->err = MG_RESOLVE_TIMEOUT; + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + break; + case MG_EV_CLOSE: + /* If we got here with request still not done, fire an error callback. */ + if (req != NULL) { + char addr[32]; + mg_sock_addr_to_str(&nc->sa, addr, sizeof(addr), MG_SOCK_STRINGIFY_IP); +#ifdef MG_LOG_DNS_FAILURES + LOG(LL_ERROR, ("Failed to resolve '%s', server %s", req->name, addr)); +#endif + req->callback(NULL, req->data, req->err); + nc->user_data = NULL; + MG_FREE(req); + } + break; + } +} + +int mg_resolve_async(struct mg_mgr *mgr, const char *name, int query, + mg_resolve_callback_t cb, void *data) { + struct mg_resolve_async_opts opts; + memset(&opts, 0, sizeof(opts)); + return mg_resolve_async_opt(mgr, name, query, cb, data, opts); +} + +int mg_resolve_async_opt(struct mg_mgr *mgr, const char *name, int query, + mg_resolve_callback_t cb, void *data, + struct mg_resolve_async_opts opts) { + struct mg_resolve_async_request *req; + struct mg_connection *dns_nc; + const char *nameserver = opts.nameserver; + char dns_server_buff[17], nameserver_url[26]; + + if (nameserver == NULL) { + nameserver = mgr->nameserver; + } + + DBG(("%s %d %p", name, query, opts.dns_conn)); + + /* resolve with DNS */ + req = (struct mg_resolve_async_request *) MG_CALLOC(1, sizeof(*req)); + if (req == NULL) { + return -1; + } + + strncpy(req->name, name, sizeof(req->name)); + req->query = query; + req->callback = cb; + req->data = data; + /* TODO(mkm): parse defaults out of resolve.conf */ + req->max_retries = opts.max_retries ? opts.max_retries : 2; + req->timeout = opts.timeout ? opts.timeout : 5; + + /* Lazily initialize dns server */ + if (nameserver == NULL) { + if (mg_get_ip_address_of_nameserver(dns_server_buff, + sizeof(dns_server_buff)) != -1) { + nameserver = dns_server_buff; + } else { + nameserver = MG_DEFAULT_NAMESERVER; + } + } + + snprintf(nameserver_url, sizeof(nameserver_url), "udp://%s:53", nameserver); + + dns_nc = mg_connect(mgr, nameserver_url, MG_CB(mg_resolve_async_eh, NULL)); + if (dns_nc == NULL) { + MG_FREE(req); + return -1; + } + dns_nc->user_data = req; + if (opts.dns_conn != NULL) { + *opts.dns_conn = dns_nc; + } + + return 0; +} + +void mg_set_nameserver(struct mg_mgr *mgr, const char *nameserver) { + MG_FREE((char *) mgr->nameserver); + mgr->nameserver = NULL; + if (nameserver != NULL) { + mgr->nameserver = strdup(nameserver); + } +} + +#endif /* MG_ENABLE_ASYNC_RESOLVER */ +#ifdef MG_MODULE_LINES +#line 1 "mongoose/src/coap.c" +#endif +/* + * Copyright (c) 2015 Cesanta Software Limited + * All rights reserved + * This software is dual-licensed: you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. For the terms of this + * license, see <http://www.gnu.org/licenses/>. + * + * You are free to use this software under the terms of the GNU General + * Public License, but WITHOUT ANY WARRANTY; without even the implied + * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + * See the GNU General Public License for more details. + * + * Alternatively, you can license this software under a commercial + * license, as set out in <https://www.cesanta.com/license>. + */ + +/* Amalgamated: #include "mongoose/src/internal.h" */ +/* Amalgamated: #include "mongoose/src/coap.h" */ + +#if MG_ENABLE_COAP + +void mg_coap_free_options(struct mg_coap_message *cm) { + while (cm->options != NULL) { + struct mg_coap_option *next = cm->options->next; + MG_FREE(cm->options); + cm->options = next; + } +} + +struct mg_coap_option *mg_coap_add_option(struct mg_coap_message *cm, + uint32_t number, char *value, + size_t len) { + struct mg_coap_option *new_option = + (struct mg_coap_option *) MG_CALLOC(1, sizeof(*new_option)); + + new_option->number = number; + new_option->value.p = value; + new_option->value.len = len; + + if (cm->options == NULL) { + cm->options = cm->optiomg_tail = new_option; + } else { + /* + * A very simple attention to help clients to compose options: + * CoAP wants to see options ASC ordered. + * Could be change by using sort in coap_compose + */ + if (cm->optiomg_tail->number <= new_option->number) { + /* if option is already ordered just add it */ + cm->optiomg_tail = cm->optiomg_tail->next = new_option; + } else { + /* looking for appropriate position */ + struct mg_coap_option *current_opt = cm->options; + struct mg_coap_option *prev_opt = 0; + + while (current_opt != NULL) { + if (current_opt->number > new_option->number) { + break; + } + prev_opt = current_opt; + current_opt = current_opt->next; + } + + if (prev_opt != NULL) { + prev_opt->next = new_option; + new_option->next = current_opt; + } else { + /* insert new_option to the beginning */ + new_option->next = cm->options; + cm->options = new_option; + } + } + } + + return new_option; +} + +/* + * Fills CoAP header in mg_coap_message. + * + * Helper function. + */ +static char *coap_parse_header(char *ptr, struct mbuf *io, + struct mg_coap_message *cm) { + if (io->len < sizeof(uint32_t)) { + cm->flags |= MG_COAP_NOT_ENOUGH_DATA; + return NULL; + } + + /* + * Version (Ver): 2-bit unsigned integer. Indicates the CoAP version + * number. Implementations of this specification MUST set this field + * to 1 (01 binary). Other values are reserved for future versions. + * Messages with unknown version numbers MUST be silently ignored. + */ + if (((uint8_t) *ptr >> 6) != 1) { + cm->flags |= MG_COAP_IGNORE; + return NULL; + } + + /* + * Type (T): 2-bit unsigned integer. Indicates if this message is of + * type Confirmable (0), Non-confirmable (1), Acknowledgement (2), or + * Reset (3). + */ + cm->msg_type = ((uint8_t) *ptr & 0x30) >> 4; + cm->flags |= MG_COAP_MSG_TYPE_FIELD; + + /* + * Token Length (TKL): 4-bit unsigned integer. Indicates the length of + * the variable-length Token field (0-8 bytes). Lengths 9-15 are + * reserved, MUST NOT be sent, and MUST be processed as a message + * format error. + */ + cm->token.len = *ptr & 0x0F; + if (cm->token.len > 8) { + cm->flags |= MG_COAP_FORMAT_ERROR; + return NULL; + } + + ptr++; + + /* + * Code: 8-bit unsigned integer, split into a 3-bit class (most + * significant bits) and a 5-bit detail (least significant bits) + */ + cm->code_class = (uint8_t) *ptr >> 5; + cm->code_detail = *ptr & 0x1F; + cm->flags |= (MG_COAP_CODE_CLASS_FIELD | MG_COAP_CODE_DETAIL_FIELD); + + ptr++; + + /* Message ID: 16-bit unsigned integer in network byte order. */ + cm->msg_id = (uint8_t) *ptr << 8 | (uint8_t) * (ptr + 1); + cm->flags |= MG_COAP_MSG_ID_FIELD; + + ptr += 2; + + return ptr; +} + +/* + * Fills token information in mg_coap_message. + * + * Helper function. + */ +static char *coap_get_token(char *ptr, struct mbuf *io, + struct mg_coap_message *cm) { + if (cm->token.len != 0) { + if (ptr + cm->token.len > io->buf + io->len) { + cm->flags |= MG_COAP_NOT_ENOUGH_DATA; + return NULL; + } else { + cm->token.p = ptr; + ptr += cm->token.len; + cm->flags |= MG_COAP_TOKEN_FIELD; + } + } + + return ptr; +} + +/* + * Returns Option Delta or Length. + * + * Helper function. + */ +static int coap_get_ext_opt(char *ptr, struct mbuf *io, uint16_t *opt_info) { + int ret = 0; + + if (*opt_info == 13) { + /* + * 13: An 8-bit unsigned integer follows the initial byte and + * indicates the Option Delta/Length minus 13. + */ + if (ptr < io->buf + io->len) { + *opt_info = (uint8_t) *ptr + 13; + ret = sizeof(uint8_t); + } else { + ret = -1; /* LCOV_EXCL_LINE */ + } + } else if (*opt_info == 14) { + /* + * 14: A 16-bit unsigned integer in network byte order follows the + * initial byte and indicates the Option Delta/Length minus 269. + */ + if (ptr + sizeof(uint8_t) < io->buf + io->len) { + *opt_info = ((uint8_t) *ptr << 8 | (uint8_t) * (ptr + 1)) + 269; + ret = sizeof(uint16_t); + } else { + ret = -1; /* LCOV_EXCL_LINE */ + } + } + + return ret; +} + +/* + * Fills options in mg_coap_message. + * + * Helper function. + * + * General options format: + * +---------------+---------------+ + * | Option Delta | Option Length | 1 byte + * +---------------+---------------+ + * \ Option Delta (extended) \ 0-2 bytes + * +-------------------------------+ + * / Option Length (extended) \ 0-2 bytes + * +-------------------------------+ + * \ Option Value \ 0 or more bytes + * +-------------------------------+ + */ +static char *coap_get_options(char *ptr, struct mbuf *io, + struct mg_coap_message *cm) { + uint16_t prev_opt = 0; + + if (ptr == io->buf + io->len) { + /* end of packet, ok */ + return NULL; + } + + /* 0xFF is payload marker */ + while (ptr < io->buf + io->len && (uint8_t) *ptr != 0xFF) { + uint16_t option_delta, option_lenght; + int optinfo_len; + + /* Option Delta: 4-bit unsigned integer */ + option_delta = ((uint8_t) *ptr & 0xF0) >> 4; + /* Option Length: 4-bit unsigned integer */ + option_lenght = *ptr & 0x0F; + + if (option_delta == 15 || option_lenght == 15) { + /* + * 15: Reserved for future use. If the field is set to this value, + * it MUST be processed as a message format error + */ + cm->flags |= MG_COAP_FORMAT_ERROR; + break; + } + + ptr++; + + /* check for extended option delta */ + optinfo_len = coap_get_ext_opt(ptr, io, &option_delta); + if (optinfo_len == -1) { + cm->flags |= MG_COAP_NOT_ENOUGH_DATA; /* LCOV_EXCL_LINE */ + break; /* LCOV_EXCL_LINE */ + } + + ptr += optinfo_len; + + /* check or extended option lenght */ + optinfo_len = coap_get_ext_opt(ptr, io, &option_lenght); + if (optinfo_len == -1) { + cm->flags |= MG_COAP_NOT_ENOUGH_DATA; /* LCOV_EXCL_LINE */ + break; /* LCOV_EXCL_LINE */ + } + + ptr += optinfo_len; + + /* + * Instead of specifying the Option Number directly, the instances MUST + * appear in order of their Option Numbers and a delta encoding is used + * between them. + */ + option_delta += prev_opt; + + mg_coap_add_option(cm, option_delta, ptr, option_lenght); + + prev_opt = option_delta; + + if (ptr + option_lenght > io->buf + io->len) { + cm->flags |= MG_COAP_NOT_ENOUGH_DATA; /* LCOV_EXCL_LINE */ + break; /* LCOV_EXCL_LINE */ + } + + ptr += option_lenght; + } + + if ((cm->flags & MG_COAP_ERROR) != 0) { + mg_coap_free_options(cm); + return NULL; + } + + cm->flags |= MG_COAP_OPTIOMG_FIELD; + + if (ptr == io->buf + io->len) { + /* end of packet, ok */ + return NULL; + } + + ptr++; + + return ptr; +} + +uint32_t mg_coap_parse(struct mbuf *io, struct mg_coap_message *cm) { + char *ptr; + + memset(cm, 0, sizeof(*cm)); + + if ((ptr = coap_parse_header(io->buf, io, cm)) == NULL) { + return cm->flags; + } + + if ((ptr = coap_get_token(ptr, io, cm)) == NULL) { + return cm->flags; + } + + if ((ptr = coap_get_options(ptr, io, cm)) == NULL) { + return cm->flags; + } + + /* the rest is payload */ + cm->payload.len = io->len - (ptr - io->buf); + if (cm->payload.len != 0) { + cm->payload.p = ptr; + cm->flags |= MG_COAP_PAYLOAD_FIELD; + } + + return cm->flags; +} + +/* + * Calculates extended size of given Opt Number/Length in coap message. + * + * Helper function. + */ +static size_t coap_get_ext_opt_size(uint32_t value) { + int ret = 0; + + if (value >= 13 && value <= 0xFF + 13) { + ret = sizeof(uint8_t); + } else if (value > 0xFF + 13 && value <= 0xFFFF + 269) { + ret = sizeof(uint16_t); + } + + return ret; +} + +/* + * Splits given Opt Number/Length into base and ext values. + * + * Helper function. + */ +static int coap_split_opt(uint32_t value, uint8_t *base, uint16_t *ext) { + int ret = 0; + + if (value < 13) { + *base = value; + } else if (value >= 13 && value <= 0xFF + 13) { + *base = 13; + *ext = value - 13; + ret = sizeof(uint8_t); + } else if (value > 0xFF + 13 && value <= 0xFFFF + 269) { + *base = 14; + *ext = value - 269; + ret = sizeof(uint16_t); + } + + return ret; +} + +/* + * Puts uint16_t (in network order) into given char stream. + * + * Helper function. + */ +static char *coap_add_uint16(char *ptr, uint16_t val) { + *ptr = val >> 8; + ptr++; + *ptr = val & 0x00FF; + ptr++; + return ptr; +} + +/* + * Puts extended value of Opt Number/Length into given char stream. + * + * Helper function. + */ +static char *coap_add_opt_info(char *ptr, uint16_t val, size_t len) { + if (len == sizeof(uint8_t)) { + *ptr = (char) val; + ptr++; + } else if (len == sizeof(uint16_t)) { + ptr = coap_add_uint16(ptr, val); + } + + return ptr; +} + +/* + * Verifies given mg_coap_message and calculates message size for it. + * + * Helper function. + */ +static uint32_t coap_calculate_packet_size(struct mg_coap_message *cm, + size_t *len) { + struct mg_coap_option *opt; + uint32_t prev_opt_number; + + *len = 4; /* header */ + if (cm->msg_type > MG_COAP_MSG_MAX) { + return MG_COAP_ERROR | MG_COAP_MSG_TYPE_FIELD; + } + if (cm->token.len > 8) { + return MG_COAP_ERROR | MG_COAP_TOKEN_FIELD; + } + if (cm->code_class > 7) { + return MG_COAP_ERROR | MG_COAP_CODE_CLASS_FIELD; + } + if (cm->code_detail > 31) { + return MG_COAP_ERROR | MG_COAP_CODE_DETAIL_FIELD; + } + + *len += cm->token.len; + if (cm->payload.len != 0) { + *len += cm->payload.len + 1; /* ... + 1; add payload marker */ + } + + opt = cm->options; + prev_opt_number = 0; + while (opt != NULL) { + *len += 1; /* basic delta/length */ + *len += coap_get_ext_opt_size(opt->number - prev_opt_number); + *len += coap_get_ext_opt_size((uint32_t) opt->value.len); + /* + * Current implementation performs check if + * option_number > previous option_number and produces an error + * TODO(alashkin): write design doc with limitations + * May be resorting is more suitable solution. + */ + if ((opt->next != NULL && opt->number > opt->next->number) || + opt->value.len > 0xFFFF + 269 || + opt->number - prev_opt_number > 0xFFFF + 269) { + return MG_COAP_ERROR | MG_COAP_OPTIOMG_FIELD; + } + *len += opt->value.len; + prev_opt_number = opt->number; + opt = opt->next; + } + + return 0; +} + +uint32_t mg_coap_compose(struct mg_coap_message *cm, struct mbuf *io) { + struct mg_coap_option *opt; + uint32_t res, prev_opt_number; + size_t prev_io_len, packet_size; + char *ptr; + + res = coap_calculate_packet_size(cm, &packet_size); + if (res != 0) { + return res; + } + + /* saving previous lenght to handle non-empty mbuf */ + prev_io_len = io->len; + if (mbuf_append(io, NULL, packet_size) == 0) return MG_COAP_ERROR; + ptr = io->buf + prev_io_len; + + /* + * since cm is verified, it is possible to use bits shift operator + * without additional zeroing of unused bits + */ + + /* ver: 2 bits, msg_type: 2 bits, toklen: 4 bits */ + *ptr = (1 << 6) | (cm->msg_type << 4) | (uint8_t)(cm->token.len); + ptr++; + + /* code class: 3 bits, code detail: 5 bits */ + *ptr = (cm->code_class << 5) | (cm->code_detail); + ptr++; + + ptr = coap_add_uint16(ptr, cm->msg_id); + + if (cm->token.len != 0) { + memcpy(ptr, cm->token.p, cm->token.len); + ptr += cm->token.len; + } + + opt = cm->options; + prev_opt_number = 0; + while (opt != NULL) { + uint8_t delta_base = 0, length_base = 0; + uint16_t delta_ext = 0, length_ext = 0; + + size_t opt_delta_len = + coap_split_opt(opt->number - prev_opt_number, &delta_base, &delta_ext); + size_t opt_lenght_len = + coap_split_opt((uint32_t) opt->value.len, &length_base, &length_ext); + + *ptr = (delta_base << 4) | length_base; + ptr++; + + ptr = coap_add_opt_info(ptr, delta_ext, opt_delta_len); + ptr = coap_add_opt_info(ptr, length_ext, opt_lenght_len); + + if (opt->value.len != 0) { + memcpy(ptr, opt->value.p, opt->value.len); + ptr += opt->value.len; + } + + prev_opt_number = opt->number; + opt = opt->next; + } + + if (cm->payload.len != 0) { + *ptr = (char) -1; + ptr++; + memcpy(ptr, cm->payload.p, cm->payload.len); + } + + return 0; +} + +uint32_t mg_coap_send_message(struct mg_connection *nc, + struct mg_coap_message *cm) { + struct mbuf packet_out; + uint32_t compose_res; + + mbuf_init(&packet_out, 0); + compose_res = mg_coap_compose(cm, &packet_out); + if (compose_res != 0) { + return compose_res; /* LCOV_EXCL_LINE */ + } + + mg_send(nc, packet_out.buf, (int) packet_out.len); + mbuf_free(&packet_out); + + return 0; +} + +uint32_t mg_coap_send_ack(struct mg_connection *nc, uint16_t msg_id) { + struct mg_coap_message cm; + memset(&cm, 0, sizeof(cm)); + cm.msg_type = MG_COAP_MSG_ACK; + cm.msg_id = msg_id; + + return mg_coap_send_message(nc, &cm); +} + +static void coap_handler(struct mg_connection *nc, int ev, + void *ev_data MG_UD_ARG(void *user_data)) { + struct mbuf *io = &nc->recv_mbuf; + struct mg_coap_message cm; + uint32_t parse_res; + + memset(&cm, 0, sizeof(cm)); + + nc->handler(nc, ev, ev_data MG_UD_ARG(user_data)); + + switch (ev) { + case MG_EV_RECV: + parse_res = mg_coap_parse(io, &cm); + if ((parse_res & MG_COAP_IGNORE) == 0) { + if ((cm.flags & MG_COAP_NOT_ENOUGH_DATA) != 0) { + /* + * Since we support UDP only + * MG_COAP_NOT_ENOUGH_DATA == MG_COAP_FORMAT_ERROR + */ + cm.flags |= MG_COAP_FORMAT_ERROR; /* LCOV_EXCL_LINE */ + } /* LCOV_EXCL_LINE */ + nc->handler(nc, MG_COAP_EVENT_BASE + cm.msg_type, + &cm MG_UD_ARG(user_data)); + } + + mg_coap_free_options(&cm); + mbuf_remove(io, io->len); + break; + } +} +/* + * Attach built-in CoAP event handler to the given connection. + * + * The user-defined event handler will receive following extra events: + * + * - MG_EV_COAP_CON + * - MG_EV_COAP_NOC + * - MG_EV_COAP_ACK + * - MG_EV_COAP_RST + */ +int mg_set_protocol_coap(struct mg_connection *nc) { + /* supports UDP only */ + if ((nc->flags & MG_F_UDP) == 0) { + return -1; + } + + nc->proto_handler = coap_handler; + + return 0; +} + +#endif /* MG_ENABLE_COAP */ +#ifdef MG_MODULE_LINES +#line 1 "mongoose/src/tun.c" +#endif +/* + * Copyright (c) 2014 Cesanta Software Limited + * All rights reserved + */ + +#if MG_ENABLE_TUN + +/* Amalgamated: #include "common/cs_dbg.h" */ +/* Amalgamated: #include "mongoose/src/http.h" */ +/* Amalgamated: #include "mongoose/src/internal.h" */ +/* Amalgamated: #include "mongoose/src/net.h" */ +/* Amalgamated: #include "mongoose/src/net_if_tun.h" */ +/* Amalgamated: #include "mongoose/src/tun.h" */ +/* Amalgamated: #include "mongoose/src/util.h" */ + +static void mg_tun_reconnect(struct mg_tun_client *client, int timeout); + +static void mg_tun_init_client(struct mg_tun_client *client, struct mg_mgr *mgr, + struct mg_iface *iface, const char *dispatcher, + struct mg_tun_ssl_opts ssl) { + client->mgr = mgr; + client->iface = iface; + client->disp_url = dispatcher; + client->last_stream_id = 0; + client->ssl = ssl; + + client->disp = NULL; /* will be set by mg_tun_reconnect */ + client->listener = NULL; /* will be set by mg_do_bind */ + client->reconnect = NULL; /* will be set by mg_tun_reconnect */ +} + +void mg_tun_log_frame(struct mg_tun_frame *frame) { + LOG(LL_DEBUG, ("Got TUN frame: type=0x%x, flags=0x%x stream_id=0x%x, " + "len=%d", + frame->type, frame->flags, (unsigned int) frame->stream_id, + (int) frame->body.len)); +#if MG_ENABLE_HEXDUMP + { + char hex[512]; + mg_hexdump(frame->body.p, frame->body.len, hex, sizeof(hex) - 1); + hex[sizeof(hex) - 1] = '\0'; + LOG(LL_DEBUG, ("body:\n%s", hex)); + } +#else + LOG(LL_DEBUG, ("body: '%.*s'", (int) frame->body.len, frame->body.p)); +#endif +} + +static void mg_tun_close_all(struct mg_tun_client *client) { + struct mg_connection *nc; + for (nc = client->mgr->active_connections; nc != NULL; nc = nc->next) { + if (nc->iface == client->iface && !(nc->flags & MG_F_LISTENING)) { + LOG(LL_DEBUG, ("Closing tunneled connection %p", nc)); + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + /* mg_close_conn(nc); */ + } + } +} + +static void mg_tun_client_handler(struct mg_connection *nc, int ev, + void *ev_data MG_UD_ARG(void *user_data)) { +#if !MG_ENABLE_CALLBACK_USERDATA + void *user_data = nc->user_data; +#else + (void) nc; +#endif + struct mg_tun_client *client = (struct mg_tun_client *) user_data; + + switch (ev) { + case MG_EV_CONNECT: { + int err = *(int *) ev_data; + + if (err) { + LOG(LL_ERROR, ("Cannot connect to the tunnel dispatcher: %d", err)); + } else { + LOG(LL_INFO, ("Connected to the tunnel dispatcher")); + } + break; + } + case MG_EV_HTTP_REPLY: { + struct http_message *hm = (struct http_message *) ev_data; + + if (hm->resp_code != 200) { + LOG(LL_ERROR, + ("Tunnel dispatcher reply non-OK status code %d", hm->resp_code)); + } + break; + } + case MG_EV_WEBSOCKET_HANDSHAKE_DONE: { + LOG(LL_INFO, ("Tunnel dispatcher handshake done")); + break; + } + case MG_EV_WEBSOCKET_FRAME: { + struct websocket_message *wm = (struct websocket_message *) ev_data; + struct mg_connection *tc; + struct mg_tun_frame frame; + + if (mg_tun_parse_frame(wm->data, wm->size, &frame) == -1) { + LOG(LL_ERROR, ("Got invalid tun frame dropping")); + break; + } + + mg_tun_log_frame(&frame); + + tc = mg_tun_if_find_conn(client, frame.stream_id); + if (tc == NULL) { + if (frame.body.len > 0) { + LOG(LL_DEBUG, ("Got frame after receiving end has been closed")); + } + break; + } + if (frame.body.len > 0) { + mg_if_recv_tcp_cb(tc, (void *) frame.body.p, frame.body.len, + 0 /* own */); + } + if (frame.flags & MG_TUN_F_END_STREAM) { + LOG(LL_DEBUG, ("Closing tunneled connection because got end of stream " + "from other end")); + tc->flags |= MG_F_CLOSE_IMMEDIATELY; + mg_close_conn(tc); + } + break; + } + case MG_EV_CLOSE: { + LOG(LL_DEBUG, ("Closing all tunneled connections")); + /* + * The client might have been already freed when the listening socket is + * closed. + */ + if (client != NULL) { + mg_tun_close_all(client); + client->disp = NULL; + LOG(LL_INFO, ("Dispatcher connection is no more, reconnecting")); + /* TODO(mkm): implement exp back off */ + mg_tun_reconnect(client, MG_TUN_RECONNECT_INTERVAL); + } + break; + } + default: + break; + } +} + +static void mg_tun_do_reconnect(struct mg_tun_client *client) { + struct mg_connection *dc; + struct mg_connect_opts opts; + memset(&opts, 0, sizeof(opts)); +#if MG_ENABLE_SSL + opts.ssl_cert = client->ssl.ssl_cert; + opts.ssl_key = client->ssl.ssl_key; + opts.ssl_ca_cert = client->ssl.ssl_ca_cert; +#endif + /* HTTP/Websocket listener */ + if ((dc = mg_connect_ws_opt(client->mgr, MG_CB(mg_tun_client_handler, client), + opts, client->disp_url, MG_TUN_PROTO_NAME, + NULL)) == NULL) { + LOG(LL_ERROR, + ("Cannot connect to WS server on addr [%s]\n", client->disp_url)); + return; + } + + client->disp = dc; +#if !MG_ENABLE_CALLBACK_USERDATA + dc->user_data = client; +#endif +} + +void mg_tun_reconnect_ev_handler(struct mg_connection *nc, int ev, + void *ev_data MG_UD_ARG(void *user_data)) { +#if !MG_ENABLE_CALLBACK_USERDATA + void *user_data = nc->user_data; +#else + (void) nc; +#endif + struct mg_tun_client *client = (struct mg_tun_client *) user_data; + (void) ev_data; + + switch (ev) { + case MG_EV_TIMER: + if (!(client->listener->flags & MG_F_TUN_DO_NOT_RECONNECT)) { + mg_tun_do_reconnect(client); + } else { + /* Reconnecting is suppressed, we'll check again at the next poll */ + mg_tun_reconnect(client, 0); + } + break; + } +} + +static void mg_tun_reconnect(struct mg_tun_client *client, int timeout) { + if (client->reconnect == NULL) { + client->reconnect = mg_add_sock(client->mgr, INVALID_SOCKET, + MG_CB(mg_tun_reconnect_ev_handler, client)); +#if !MG_ENABLE_CALLBACK_USERDATA + client->reconnect->user_data = client; +#endif + } + client->reconnect->ev_timer_time = mg_time() + timeout; +} + +static struct mg_tun_client *mg_tun_create_client(struct mg_mgr *mgr, + const char *dispatcher, + struct mg_tun_ssl_opts ssl) { + struct mg_tun_client *client = NULL; + struct mg_iface *iface = mg_find_iface(mgr, &mg_tun_iface_vtable, NULL); + if (iface == NULL) { + LOG(LL_ERROR, ("The tun feature requires the manager to have a tun " + "interface enabled")); + return NULL; + } + + client = (struct mg_tun_client *) MG_MALLOC(sizeof(*client)); + mg_tun_init_client(client, mgr, iface, dispatcher, ssl); + iface->data = client; + + /* + * We need to give application a chance to set MG_F_TUN_DO_NOT_RECONNECT on a + * listening connection right after mg_tun_bind_opt() returned it, so we + * should use mg_tun_reconnect() here, instead of mg_tun_do_reconnect() + */ + mg_tun_reconnect(client, 0); + return client; +} + +void mg_tun_destroy_client(struct mg_tun_client *client) { + /* + * NOTE: + * `client` is NULL in case of OOM + * `client->disp` is NULL if connection failed + * `client->iface is NULL is `mg_find_iface` failed + */ + + if (client != NULL && client->disp != NULL) { + /* the dispatcher connection handler will in turn close all tunnels */ + client->disp->flags |= MG_F_CLOSE_IMMEDIATELY; + /* this is used as a signal to other tun handlers that the party is over */ + client->disp->user_data = NULL; + } + + if (client != NULL && client->reconnect != NULL) { + client->reconnect->flags |= MG_F_CLOSE_IMMEDIATELY; + } + + if (client != NULL && client->iface != NULL) { + client->iface->data = NULL; + } + + MG_FREE(client); +} + +static struct mg_connection *mg_tun_do_bind(struct mg_tun_client *client, + MG_CB(mg_event_handler_t handler, + void *user_data), + struct mg_bind_opts opts) { + struct mg_connection *lc; + opts.iface = client->iface; + lc = mg_bind_opt(client->mgr, ":1234" /* dummy port */, + MG_CB(handler, user_data), opts); + client->listener = lc; + return lc; +} + +struct mg_connection *mg_tun_bind_opt(struct mg_mgr *mgr, + const char *dispatcher, + MG_CB(mg_event_handler_t handler, + void *user_data), + struct mg_bind_opts opts) { +#if MG_ENABLE_SSL + struct mg_tun_ssl_opts ssl = {opts.ssl_cert, opts.ssl_key, opts.ssl_ca_cert}; +#else + struct mg_tun_ssl_opts ssl = {0}; +#endif + struct mg_tun_client *client = mg_tun_create_client(mgr, dispatcher, ssl); + if (client == NULL) { + return NULL; + } +#if MG_ENABLE_SSL + /* these options don't make sense in the local mouth of the tunnel */ + opts.ssl_cert = NULL; + opts.ssl_key = NULL; + opts.ssl_ca_cert = NULL; +#endif + return mg_tun_do_bind(client, MG_CB(handler, user_data), opts); +} + +int mg_tun_parse_frame(void *data, size_t len, struct mg_tun_frame *frame) { + const size_t header_size = sizeof(uint32_t) + sizeof(uint8_t) * 2; + if (len < header_size) { + return -1; + } + + frame->type = *(uint8_t *) (data); + frame->flags = *(uint8_t *) ((char *) data + 1); + memcpy(&frame->stream_id, (char *) data + 2, sizeof(uint32_t)); + frame->stream_id = ntohl(frame->stream_id); + frame->body.p = (char *) data + header_size; + frame->body.len = len - header_size; + return 0; +} + +void mg_tun_send_frame(struct mg_connection *ws, uint32_t stream_id, + uint8_t type, uint8_t flags, struct mg_str msg) { + stream_id = htonl(stream_id); + { + struct mg_str parts[] = { + {(char *) &type, sizeof(type)}, + {(char *) &flags, sizeof(flags)}, + {(char *) &stream_id, sizeof(stream_id)}, + {msg.p, msg.len} /* vc6 doesn't like just `msg` here */}; + mg_send_websocket_framev(ws, WEBSOCKET_OP_BINARY, parts, + sizeof(parts) / sizeof(parts[0])); + } +} + +#endif /* MG_ENABLE_TUN */ +#ifdef MG_MODULE_LINES +#line 1 "mongoose/src/sntp.c" +#endif +/* + * Copyright (c) 2016 Cesanta Software Limited + * All rights reserved + */ + +/* Amalgamated: #include "mongoose/src/internal.h" */ +/* Amalgamated: #include "mongoose/src/sntp.h" */ +/* Amalgamated: #include "mongoose/src/util.h" */ + +#if MG_ENABLE_SNTP + +#define SNTP_TIME_OFFSET 2208988800 + +#ifndef SNTP_TIMEOUT +#define SNTP_TIMEOUT 10 +#endif + +#ifndef SNTP_ATTEMPTS +#define SNTP_ATTEMPTS 3 +#endif + +static uint64_t mg_get_sec(uint64_t val) { + return (val & 0xFFFFFFFF00000000) >> 32; +} + +static uint64_t mg_get_usec(uint64_t val) { + uint64_t tmp = (val & 0x00000000FFFFFFFF); + tmp *= 1000000; + tmp >>= 32; + return tmp; +} + +static void mg_ntp_to_tv(uint64_t val, struct timeval *tv) { + uint64_t tmp; + tmp = mg_get_sec(val); + tmp -= SNTP_TIME_OFFSET; + tv->tv_sec = tmp; + tv->tv_usec = mg_get_usec(val); +} + +static void mg_get_ntp_ts(const char *ntp, uint64_t *val) { + uint32_t tmp; + memcpy(&tmp, ntp, sizeof(tmp)); + tmp = ntohl(tmp); + *val = (uint64_t) tmp << 32; + memcpy(&tmp, ntp + 4, sizeof(tmp)); + tmp = ntohl(tmp); + *val |= tmp; +} + +void mg_sntp_send_request(struct mg_connection *c) { + uint8_t buf[48] = {0}; + /* + * header - 8 bit: + * LI (2 bit) - 3 (not in sync), VN (3 bit) - 4 (version), + * mode (3 bit) - 3 (client) + */ + buf[0] = (3 << 6) | (4 << 3) | 3; + +/* + * Next fields should be empty in client request + * stratum, 8 bit + * poll interval, 8 bit + * rrecision, 8 bit + * root delay, 32 bit + * root dispersion, 32 bit + * ref id, 32 bit + * ref timestamp, 64 bit + * originate Timestamp, 64 bit + * receive Timestamp, 64 bit +*/ + +/* + * convert time to sntp format (sntp starts from 00:00:00 01.01.1900) + * according to rfc868 it is 2208988800L sec + * this information is used to correct roundtrip delay + * but if local clock is absolutely broken (and doesn't work even + * as simple timer), it is better to disable it +*/ +#ifndef MG_SNTP_NO_DELAY_CORRECTION + uint32_t sec; + sec = htonl((uint32_t)(mg_time() + SNTP_TIME_OFFSET)); + memcpy(&buf[40], &sec, sizeof(sec)); +#endif + + mg_send(c, buf, sizeof(buf)); +} + +#ifndef MG_SNTP_NO_DELAY_CORRECTION +static uint64_t mg_calculate_delay(uint64_t t1, uint64_t t2, uint64_t t3) { + /* roundloop delay = (T4 - T1) - (T3 - T2) */ + uint64_t d1 = ((mg_time() + SNTP_TIME_OFFSET) * 1000000) - + (mg_get_sec(t1) * 1000000 + mg_get_usec(t1)); + uint64_t d2 = (mg_get_sec(t3) * 1000000 + mg_get_usec(t3)) - + (mg_get_sec(t2) * 1000000 + mg_get_usec(t2)); + + return (d1 > d2) ? d1 - d2 : 0; +} +#endif + +MG_INTERNAL int mg_sntp_parse_reply(const char *buf, int len, + struct mg_sntp_message *msg) { + uint8_t hdr; + uint64_t trsm_ts_T3, delay = 0; + int mode; + struct timeval tv; + + if (len < 48) { + return -1; + } + + hdr = buf[0]; + + if ((hdr & 0x38) >> 3 != 4) { + /* Wrong version */ + return -1; + } + + mode = hdr & 0x7; + if (mode != 4 && mode != 5) { + /* Not a server reply */ + return -1; + } + + memset(msg, 0, sizeof(*msg)); + + msg->kiss_of_death = (buf[1] == 0); /* Server asks to not send requests */ + + mg_get_ntp_ts(&buf[40], &trsm_ts_T3); + +#ifndef MG_SNTP_NO_DELAY_CORRECTION + { + uint64_t orig_ts_T1, recv_ts_T2; + mg_get_ntp_ts(&buf[24], &orig_ts_T1); + mg_get_ntp_ts(&buf[32], &recv_ts_T2); + delay = mg_calculate_delay(orig_ts_T1, recv_ts_T2, trsm_ts_T3); + } +#endif + + mg_ntp_to_tv(trsm_ts_T3, &tv); + + msg->time = (double) tv.tv_sec + (((double) tv.tv_usec + delay) / 1000000.0); + + return 0; +} + +static void mg_sntp_handler(struct mg_connection *c, int ev, + void *ev_data MG_UD_ARG(void *user_data)) { + struct mbuf *io = &c->recv_mbuf; + struct mg_sntp_message msg; + + c->handler(c, ev, ev_data MG_UD_ARG(user_data)); + + switch (ev) { + case MG_EV_RECV: { + if (mg_sntp_parse_reply(io->buf, io->len, &msg) < 0) { + DBG(("Invalid SNTP packet received (%d)", (int) io->len)); + c->handler(c, MG_SNTP_MALFORMED_REPLY, NULL MG_UD_ARG(user_data)); + } else { + c->handler(c, MG_SNTP_REPLY, (void *) &msg MG_UD_ARG(user_data)); + } + + mbuf_remove(io, io->len); + break; + } + } +} + +int mg_set_protocol_sntp(struct mg_connection *c) { + if ((c->flags & MG_F_UDP) == 0) { + return -1; + } + + c->proto_handler = mg_sntp_handler; + + return 0; +} + +struct mg_connection *mg_sntp_connect(struct mg_mgr *mgr, + MG_CB(mg_event_handler_t event_handler, + void *user_data), + const char *sntp_server_name) { + struct mg_connection *c = NULL; + char url[100], *p_url = url; + const char *proto = "", *port = "", *tmp; + + /* If port is not specified, use default (123) */ + tmp = strchr(sntp_server_name, ':'); + if (tmp != NULL && *(tmp + 1) == '/') { + tmp = strchr(tmp + 1, ':'); + } + + if (tmp == NULL) { + port = ":123"; + } + + /* Add udp:// if needed */ + if (strncmp(sntp_server_name, "udp://", 6) != 0) { + proto = "udp://"; + } + + mg_asprintf(&p_url, sizeof(url), "%s%s%s", proto, sntp_server_name, port); + + c = mg_connect(mgr, p_url, event_handler MG_UD_ARG(user_data)); + + if (c == NULL) { + goto cleanup; + } + + mg_set_protocol_sntp(c); + +cleanup: + if (p_url != url) { + MG_FREE(p_url); + } + + return c; +} + +struct sntp_data { + mg_event_handler_t hander; + int count; +}; + +static void mg_sntp_util_ev_handler(struct mg_connection *c, int ev, + void *ev_data MG_UD_ARG(void *user_data)) { +#if !MG_ENABLE_CALLBACK_USERDATA + void *user_data = c->user_data; +#endif + struct sntp_data *sd = (struct sntp_data *) user_data; + + switch (ev) { + case MG_EV_CONNECT: + if (*(int *) ev_data != 0) { + mg_call(c, sd->hander, c->user_data, MG_SNTP_FAILED, NULL); + break; + } + /* fallthrough */ + case MG_EV_TIMER: + if (sd->count <= SNTP_ATTEMPTS) { + mg_sntp_send_request(c); + mg_set_timer(c, mg_time() + 10); + sd->count++; + } else { + mg_call(c, sd->hander, c->user_data, MG_SNTP_FAILED, NULL); + c->flags |= MG_F_CLOSE_IMMEDIATELY; + } + break; + case MG_SNTP_MALFORMED_REPLY: + mg_call(c, sd->hander, c->user_data, MG_SNTP_FAILED, NULL); + c->flags |= MG_F_CLOSE_IMMEDIATELY; + break; + case MG_SNTP_REPLY: + mg_call(c, sd->hander, c->user_data, MG_SNTP_REPLY, ev_data); + c->flags |= MG_F_CLOSE_IMMEDIATELY; + break; + case MG_EV_CLOSE: + MG_FREE(user_data); + c->user_data = NULL; + break; + } +} + +struct mg_connection *mg_sntp_get_time(struct mg_mgr *mgr, + mg_event_handler_t event_handler, + const char *sntp_server_name) { + struct mg_connection *c; + struct sntp_data *sd = (struct sntp_data *) MG_CALLOC(1, sizeof(*sd)); + if (sd == NULL) { + return NULL; + } + + c = mg_sntp_connect(mgr, MG_CB(mg_sntp_util_ev_handler, sd), + sntp_server_name); + if (c == NULL) { + MG_FREE(sd); + return NULL; + } + + sd->hander = event_handler; +#if !MG_ENABLE_CALLBACK_USERDATA + c->user_data = sd; +#endif + + return c; +} + +#endif /* MG_ENABLE_SNTP */ +#ifdef MG_MODULE_LINES +#line 1 "mongoose/src/socks.c" +#endif +/* + * Copyright (c) 2017 Cesanta Software Limited + * All rights reserved + */ + +#if MG_ENABLE_SOCKS + +/* Amalgamated: #include "mongoose/src/socks.h" */ +/* Amalgamated: #include "mongoose/src/internal.h" */ + +/* + * https://www.ietf.org/rfc/rfc1928.txt paragraph 3, handle client handshake + * + * +----+----------+----------+ + * |VER | NMETHODS | METHODS | + * +----+----------+----------+ + * | 1 | 1 | 1 to 255 | + * +----+----------+----------+ + */ +static void mg_socks5_handshake(struct mg_connection *c) { + struct mbuf *r = &c->recv_mbuf; + if (r->buf[0] != MG_SOCKS_VERSION) { + c->flags |= MG_F_CLOSE_IMMEDIATELY; + } else if (r->len > 2 && (size_t) r->buf[1] + 2 <= r->len) { + /* https://www.ietf.org/rfc/rfc1928.txt paragraph 3 */ + unsigned char reply[2] = {MG_SOCKS_VERSION, MG_SOCKS_HANDSHAKE_FAILURE}; + int i; + for (i = 2; i < r->buf[1] + 2; i++) { + /* TODO(lsm): support other auth methods */ + if (r->buf[i] == MG_SOCKS_HANDSHAKE_NOAUTH) reply[1] = r->buf[i]; + } + mbuf_remove(r, 2 + r->buf[1]); + mg_send(c, reply, sizeof(reply)); + c->flags |= MG_SOCKS_HANDSHAKE_DONE; /* Mark handshake done */ + } +} + +static void disband(struct mg_connection *c) { + struct mg_connection *c2 = (struct mg_connection *) c->user_data; + if (c2 != NULL) { + c2->flags |= MG_F_SEND_AND_CLOSE; + c2->user_data = NULL; + } + c->flags |= MG_F_SEND_AND_CLOSE; + c->user_data = NULL; +} + +static void relay_data(struct mg_connection *c) { + struct mg_connection *c2 = (struct mg_connection *) c->user_data; + if (c2 != NULL) { + mg_send(c2, c->recv_mbuf.buf, c->recv_mbuf.len); + mbuf_remove(&c->recv_mbuf, c->recv_mbuf.len); + } else { + c->flags |= MG_F_SEND_AND_CLOSE; + } +} + +static void serv_ev_handler(struct mg_connection *c, int ev, void *ev_data) { + if (ev == MG_EV_CLOSE) { + disband(c); + } else if (ev == MG_EV_RECV) { + relay_data(c); + } else if (ev == MG_EV_CONNECT) { + int res = *(int *) ev_data; + if (res != 0) LOG(LL_ERROR, ("connect error: %d", res)); + } +} + +static void mg_socks5_connect(struct mg_connection *c, const char *addr) { + struct mg_connection *serv = mg_connect(c->mgr, addr, serv_ev_handler); + serv->user_data = c; + c->user_data = serv; +} + +/* + * Request, https://www.ietf.org/rfc/rfc1928.txt paragraph 4 + * + * +----+-----+-------+------+----------+----------+ + * |VER | CMD | RSV | ATYP | DST.ADDR | DST.PORT | + * +----+-----+-------+------+----------+----------+ + * | 1 | 1 | X'00' | 1 | Variable | 2 | + * +----+-----+-------+------+----------+----------+ + */ +static void mg_socks5_handle_request(struct mg_connection *c) { + struct mbuf *r = &c->recv_mbuf; + unsigned char *p = (unsigned char *) r->buf; + unsigned char addr_len = 4, reply = MG_SOCKS_SUCCESS; + int ver, cmd, atyp; + char addr[300]; + + if (r->len < 8) return; /* return if not fully buffered. min DST.ADDR is 2 */ + ver = p[0]; + cmd = p[1]; + atyp = p[3]; + + /* TODO(lsm): support other commands */ + if (ver != MG_SOCKS_VERSION || cmd != MG_SOCKS_CMD_CONNECT) { + reply = MG_SOCKS_CMD_NOT_SUPPORTED; + } else if (atyp == MG_SOCKS_ADDR_IPV4) { + addr_len = 4; + if (r->len < (size_t) addr_len + 6) return; /* return if not buffered */ + snprintf(addr, sizeof(addr), "%d.%d.%d.%d:%d", p[4], p[5], p[6], p[7], + p[8] << 8 | p[9]); + mg_socks5_connect(c, addr); + } else if (atyp == MG_SOCKS_ADDR_IPV6) { + addr_len = 16; + if (r->len < (size_t) addr_len + 6) return; /* return if not buffered */ + snprintf(addr, sizeof(addr), "[%x:%x:%x:%x:%x:%x:%x:%x]:%d", + p[4] << 8 | p[5], p[6] << 8 | p[7], p[8] << 8 | p[9], + p[10] << 8 | p[11], p[12] << 8 | p[13], p[14] << 8 | p[15], + p[16] << 8 | p[17], p[18] << 8 | p[19], p[20] << 8 | p[21]); + mg_socks5_connect(c, addr); + } else if (atyp == MG_SOCKS_ADDR_DOMAIN) { + addr_len = p[4] + 1; + if (r->len < (size_t) addr_len + 6) return; /* return if not buffered */ + snprintf(addr, sizeof(addr), "%.*s:%d", p[4], p + 5, + p[4 + addr_len] << 8 | p[4 + addr_len + 1]); + mg_socks5_connect(c, addr); + } else { + reply = MG_SOCKS_ADDR_NOT_SUPPORTED; + } + + /* + * Reply, https://www.ietf.org/rfc/rfc1928.txt paragraph 5 + * + * +----+-----+-------+------+----------+----------+ + * |VER | REP | RSV | ATYP | BND.ADDR | BND.PORT | + * +----+-----+-------+------+----------+----------+ + * | 1 | 1 | X'00' | 1 | Variable | 2 | + * +----+-----+-------+------+----------+----------+ + */ + { + unsigned char buf[] = {MG_SOCKS_VERSION, reply, 0}; + mg_send(c, buf, sizeof(buf)); + } + mg_send(c, r->buf + 3, addr_len + 1 + 2); + + mbuf_remove(r, 6 + addr_len); /* Remove request from the input stream */ + c->flags |= MG_SOCKS_CONNECT_DONE; /* Mark ourselves as connected */ +} + +static void socks_handler(struct mg_connection *c, int ev, void *ev_data) { + if (ev == MG_EV_RECV) { + if (!(c->flags & MG_SOCKS_HANDSHAKE_DONE)) mg_socks5_handshake(c); + if (c->flags & MG_SOCKS_HANDSHAKE_DONE && + !(c->flags & MG_SOCKS_CONNECT_DONE)) { + mg_socks5_handle_request(c); + } + if (c->flags & MG_SOCKS_CONNECT_DONE) relay_data(c); + } else if (ev == MG_EV_CLOSE) { + disband(c); + } + (void) ev_data; +} + +void mg_set_protocol_socks(struct mg_connection *c) { + c->proto_handler = socks_handler; +} +#endif +#ifdef MG_MODULE_LINES +#line 1 "common/platforms/cc3200/cc3200_libc.c" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +#if CS_PLATFORM == CS_P_CC3200 + +/* Amalgamated: #include "common/mg_mem.h" */ +#include <stdio.h> +#include <string.h> + +#ifndef __TI_COMPILER_VERSION__ +#include <reent.h> +#include <sys/stat.h> +#include <sys/time.h> +#include <unistd.h> +#endif + +#include <inc/hw_types.h> +#include <inc/hw_memmap.h> +#include <driverlib/prcm.h> +#include <driverlib/rom.h> +#include <driverlib/rom_map.h> +#include <driverlib/uart.h> +#include <driverlib/utils.h> + +#define CONSOLE_UART UARTA0_BASE + +#ifdef __TI_COMPILER_VERSION__ +int asprintf(char **strp, const char *fmt, ...) { + va_list ap; + int len; + + *strp = MG_MALLOC(BUFSIZ); + if (*strp == NULL) return -1; + + va_start(ap, fmt); + len = vsnprintf(*strp, BUFSIZ, fmt, ap); + va_end(ap); + + if (len > 0) { + *strp = MG_REALLOC(*strp, len + 1); + if (*strp == NULL) return -1; + } + + if (len >= BUFSIZ) { + va_start(ap, fmt); + len = vsnprintf(*strp, len + 1, fmt, ap); + va_end(ap); + } + + return len; +} + +#if MG_TI_NO_HOST_INTERFACE +time_t HOSTtime() { + struct timeval tp; + gettimeofday(&tp, NULL); + return tp.tv_sec; +} +#endif + +#endif /* __TI_COMPILER_VERSION__ */ + +void fprint_str(FILE *fp, const char *str) { + while (*str != '\0') { + if (*str == '\n') MAP_UARTCharPut(CONSOLE_UART, '\r'); + MAP_UARTCharPut(CONSOLE_UART, *str++); + } +} + +void _exit(int status) { + fprint_str(stderr, "_exit\n"); + /* cause an unaligned access exception, that will drop you into gdb */ + *(int *) 1 = status; + while (1) + ; /* avoid gcc warning because stdlib abort() has noreturn attribute */ +} + +void _not_implemented(const char *what) { + fprint_str(stderr, what); + fprint_str(stderr, " is not implemented\n"); + _exit(42); +} + +int _kill(int pid, int sig) { + (void) pid; + (void) sig; + _not_implemented("_kill"); + return -1; +} + +int _getpid() { + fprint_str(stderr, "_getpid is not implemented\n"); + return 42; +} + +int _isatty(int fd) { + /* 0, 1 and 2 are TTYs. */ + return fd < 2; +} + +#endif /* CS_PLATFORM == CS_P_CC3200 */ +#ifdef MG_MODULE_LINES +#line 1 "common/platforms/msp432/msp432_libc.c" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +#if CS_PLATFORM == CS_P_MSP432 + +#include <ti/sysbios/BIOS.h> +#include <ti/sysbios/knl/Clock.h> + +int gettimeofday(struct timeval *tp, void *tzp) { + uint32_t ticks = Clock_getTicks(); + tp->tv_sec = ticks / 1000; + tp->tv_usec = (ticks % 1000) * 1000; + return 0; +} + +#endif /* CS_PLATFORM == CS_P_MSP432 */ +#ifdef MG_MODULE_LINES +#line 1 "common/platforms/nrf5/nrf5_libc.c" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +#if (CS_PLATFORM == CS_P_NRF51 || CS_PLATFORM == CS_P_NRF52) && \ + defined(__ARMCC_VERSION) +int gettimeofday(struct timeval *tp, void *tzp) { + /* TODO */ + tp->tv_sec = 0; + tp->tv_usec = 0; + return 0; +} +#endif +#ifdef MG_MODULE_LINES +#line 1 "common/platforms/simplelink/sl_fs_slfs.h" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +#ifndef CS_COMMON_PLATFORMS_SIMPLELINK_SL_FS_SLFS_H_ +#define CS_COMMON_PLATFORMS_SIMPLELINK_SL_FS_SLFS_H_ + +#if defined(MG_FS_SLFS) + +#include <stdio.h> +#ifndef __TI_COMPILER_VERSION__ +#include <unistd.h> +#include <sys/stat.h> +#endif + +#define MAX_OPEN_SLFS_FILES 8 + +/* Indirect libc interface - same functions, different names. */ +int fs_slfs_open(const char *pathname, int flags, mode_t mode); +int fs_slfs_close(int fd); +ssize_t fs_slfs_read(int fd, void *buf, size_t count); +ssize_t fs_slfs_write(int fd, const void *buf, size_t count); +int fs_slfs_stat(const char *pathname, struct stat *s); +int fs_slfs_fstat(int fd, struct stat *s); +off_t fs_slfs_lseek(int fd, off_t offset, int whence); +int fs_slfs_unlink(const char *filename); +int fs_slfs_rename(const char *from, const char *to); + +void fs_slfs_set_new_file_size(const char *name, size_t size); + +#endif /* defined(MG_FS_SLFS) */ + +#endif /* CS_COMMON_PLATFORMS_SIMPLELINK_SL_FS_SLFS_H_ */ +#ifdef MG_MODULE_LINES +#line 1 "common/platforms/simplelink/sl_fs_slfs.c" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +/* Standard libc interface to TI SimpleLink FS. */ + +#if defined(MG_FS_SLFS) || defined(CC3200_FS_SLFS) + +/* Amalgamated: #include "common/platforms/simplelink/sl_fs_slfs.h" */ + +#include <errno.h> + +#if CS_PLATFORM == CS_P_CC3200 +#include <inc/hw_types.h> +#endif + +/* Amalgamated: #include "common/cs_dbg.h" */ +/* Amalgamated: #include "common/mg_mem.h" */ + +#if SL_MAJOR_VERSION_NUM < 2 +int slfs_open(const unsigned char *fname, uint32_t flags) { + _i32 fh; + _i32 r = sl_FsOpen(fname, flags, NULL /* token */, &fh); + return (r < 0 ? r : fh); +} +#else /* SL_MAJOR_VERSION_NUM >= 2 */ +int slfs_open(const unsigned char *fname, uint32_t flags) { + return sl_FsOpen(fname, flags, NULL /* token */); +} +#endif + +/* From sl_fs.c */ +int set_errno(int e); +const char *drop_dir(const char *fname, bool *is_slfs); + +/* + * With SLFS, you have to pre-declare max file size. Yes. Really. + * 64K should be enough for everyone. Right? + */ +#ifndef FS_SLFS_MAX_FILE_SIZE +#define FS_SLFS_MAX_FILE_SIZE (64 * 1024) +#endif + +struct sl_file_size_hint { + char *name; + size_t size; +}; + +struct sl_fd_info { + _i32 fh; + _off_t pos; + size_t size; +}; + +static struct sl_fd_info s_sl_fds[MAX_OPEN_SLFS_FILES]; +static struct sl_file_size_hint s_sl_file_size_hints[MAX_OPEN_SLFS_FILES]; + +static int sl_fs_to_errno(_i32 r) { + DBG(("SL error: %d", (int) r)); + switch (r) { + case SL_FS_OK: + return 0; + case SL_ERROR_FS_FILE_NAME_EXIST: + return EEXIST; + case SL_ERROR_FS_WRONG_FILE_NAME: + return EINVAL; + case SL_ERROR_FS_NO_AVAILABLE_NV_INDEX: + case SL_ERROR_FS_NOT_ENOUGH_STORAGE_SPACE: + return ENOSPC; + case SL_ERROR_FS_FAILED_TO_ALLOCATE_MEM: + return ENOMEM; + case SL_ERROR_FS_FILE_NOT_EXISTS: + return ENOENT; + case SL_ERROR_FS_NOT_SUPPORTED: + return ENOTSUP; + } + return ENXIO; +} + +int fs_slfs_open(const char *pathname, int flags, mode_t mode) { + int fd; + for (fd = 0; fd < MAX_OPEN_SLFS_FILES; fd++) { + if (s_sl_fds[fd].fh <= 0) break; + } + if (fd >= MAX_OPEN_SLFS_FILES) return set_errno(ENOMEM); + struct sl_fd_info *fi = &s_sl_fds[fd]; + + /* + * Apply path manipulations again, in case we got here directly + * (via TI libc's "add_device"). + */ + pathname = drop_dir(pathname, NULL); + + _u32 am = 0; + fi->size = (size_t) -1; + int rw = (flags & 3); + size_t new_size = FS_SLFS_MAX_FILE_SIZE; + if (rw == O_RDONLY) { + SlFsFileInfo_t sl_fi; + _i32 r = sl_FsGetInfo((const _u8 *) pathname, 0, &sl_fi); + if (r == SL_FS_OK) { + fi->size = SL_FI_FILE_SIZE(sl_fi); + } + am = SL_FS_READ; + } else { + if (!(flags & O_TRUNC) || (flags & O_APPEND)) { + // FailFS files cannot be opened for append and will be truncated + // when opened for write. + return set_errno(ENOTSUP); + } + if (flags & O_CREAT) { + size_t i; + for (i = 0; i < MAX_OPEN_SLFS_FILES; i++) { + if (s_sl_file_size_hints[i].name != NULL && + strcmp(s_sl_file_size_hints[i].name, pathname) == 0) { + new_size = s_sl_file_size_hints[i].size; + MG_FREE(s_sl_file_size_hints[i].name); + s_sl_file_size_hints[i].name = NULL; + break; + } + } + am = FS_MODE_OPEN_CREATE(new_size, 0); + } else { + am = SL_FS_WRITE; + } + } + fi->fh = slfs_open((_u8 *) pathname, am); + LOG(LL_DEBUG, ("sl_FsOpen(%s, 0x%x) sz %u = %d", pathname, (int) am, + (unsigned int) new_size, (int) fi->fh)); + int r; + if (fi->fh >= 0) { + fi->pos = 0; + r = fd; + } else { + r = set_errno(sl_fs_to_errno(fi->fh)); + } + return r; +} + +int fs_slfs_close(int fd) { + struct sl_fd_info *fi = &s_sl_fds[fd]; + if (fi->fh <= 0) return set_errno(EBADF); + _i32 r = sl_FsClose(fi->fh, NULL, NULL, 0); + LOG(LL_DEBUG, ("sl_FsClose(%d) = %d", (int) fi->fh, (int) r)); + s_sl_fds[fd].fh = -1; + return set_errno(sl_fs_to_errno(r)); +} + +ssize_t fs_slfs_read(int fd, void *buf, size_t count) { + struct sl_fd_info *fi = &s_sl_fds[fd]; + if (fi->fh <= 0) return set_errno(EBADF); + /* Simulate EOF. sl_FsRead @ file_size return SL_FS_ERR_OFFSET_OUT_OF_RANGE. + */ + if (fi->pos == fi->size) return 0; + _i32 r = sl_FsRead(fi->fh, fi->pos, buf, count); + DBG(("sl_FsRead(%d, %d, %d) = %d", (int) fi->fh, (int) fi->pos, (int) count, + (int) r)); + if (r >= 0) { + fi->pos += r; + return r; + } + return set_errno(sl_fs_to_errno(r)); +} + +ssize_t fs_slfs_write(int fd, const void *buf, size_t count) { + struct sl_fd_info *fi = &s_sl_fds[fd]; + if (fi->fh <= 0) return set_errno(EBADF); + _i32 r = sl_FsWrite(fi->fh, fi->pos, (_u8 *) buf, count); + DBG(("sl_FsWrite(%d, %d, %d) = %d", (int) fi->fh, (int) fi->pos, (int) count, + (int) r)); + if (r >= 0) { + fi->pos += r; + return r; + } + return set_errno(sl_fs_to_errno(r)); +} + +int fs_slfs_stat(const char *pathname, struct stat *s) { + SlFsFileInfo_t sl_fi; + /* + * Apply path manipulations again, in case we got here directly + * (via TI libc's "add_device"). + */ + pathname = drop_dir(pathname, NULL); + _i32 r = sl_FsGetInfo((const _u8 *) pathname, 0, &sl_fi); + if (r == SL_FS_OK) { + s->st_mode = S_IFREG | 0666; + s->st_nlink = 1; + s->st_size = SL_FI_FILE_SIZE(sl_fi); + return 0; + } + return set_errno(sl_fs_to_errno(r)); +} + +int fs_slfs_fstat(int fd, struct stat *s) { + struct sl_fd_info *fi = &s_sl_fds[fd]; + if (fi->fh <= 0) return set_errno(EBADF); + s->st_mode = 0666; + s->st_mode = S_IFREG | 0666; + s->st_nlink = 1; + s->st_size = fi->size; + return 0; +} + +off_t fs_slfs_lseek(int fd, off_t offset, int whence) { + if (s_sl_fds[fd].fh <= 0) return set_errno(EBADF); + switch (whence) { + case SEEK_SET: + s_sl_fds[fd].pos = offset; + break; + case SEEK_CUR: + s_sl_fds[fd].pos += offset; + break; + case SEEK_END: + return set_errno(ENOTSUP); + } + return 0; +} + +int fs_slfs_unlink(const char *pathname) { + /* + * Apply path manipulations again, in case we got here directly + * (via TI libc's "add_device"). + */ + pathname = drop_dir(pathname, NULL); + return set_errno(sl_fs_to_errno(sl_FsDel((const _u8 *) pathname, 0))); +} + +int fs_slfs_rename(const char *from, const char *to) { + return set_errno(ENOTSUP); +} + +void fs_slfs_set_new_file_size(const char *name, size_t size) { + int i; + for (i = 0; i < MAX_OPEN_SLFS_FILES; i++) { + if (s_sl_file_size_hints[i].name == NULL) { + DBG(("File size hint: %s %d", name, (int) size)); + s_sl_file_size_hints[i].name = strdup(name); + s_sl_file_size_hints[i].size = size; + break; + } + } +} + +#endif /* defined(MG_FS_SLFS) || defined(CC3200_FS_SLFS) */ +#ifdef MG_MODULE_LINES +#line 1 "common/platforms/simplelink/sl_fs.c" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +#if MG_NET_IF == MG_NET_IF_SIMPLELINK && \ + (defined(MG_FS_SLFS) || defined(MG_FS_SPIFFS)) + +int set_errno(int e) { + errno = e; + return (e == 0 ? 0 : -1); +} + +const char *drop_dir(const char *fname, bool *is_slfs) { + if (is_slfs != NULL) { + *is_slfs = (strncmp(fname, "SL:", 3) == 0); + if (*is_slfs) fname += 3; + } + /* Drop "./", if any */ + if (fname[0] == '.' && fname[1] == '/') { + fname += 2; + } + /* + * Drop / if it is the only one in the path. + * This allows use of /pretend/directories but serves /file.txt as normal. + */ + if (fname[0] == '/' && strchr(fname + 1, '/') == NULL) { + fname++; + } + return fname; +} + +#if !defined(MG_FS_NO_VFS) + +#include <errno.h> +#include <stdbool.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#ifdef __TI_COMPILER_VERSION__ +#include <file.h> +#endif + +/* Amalgamated: #include "common/cs_dbg.h" */ +/* Amalgamated: #include "common/platform.h" */ + +#ifdef CC3200_FS_SPIFFS +/* Amalgamated: #include "cc3200_fs_spiffs.h" */ +#endif + +#ifdef MG_FS_SLFS +/* Amalgamated: #include "sl_fs_slfs.h" */ +#endif + +#define NUM_SYS_FDS 3 +#define SPIFFS_FD_BASE 10 +#define SLFS_FD_BASE 100 + +#if !defined(MG_UART_CHAR_PUT) && !defined(MG_UART_WRITE) +#if CS_PLATFORM == CS_P_CC3200 +#include <inc/hw_types.h> +#include <inc/hw_memmap.h> +#include <driverlib/rom.h> +#include <driverlib/rom_map.h> +#include <driverlib/uart.h> +#define MG_UART_CHAR_PUT(fd, c) MAP_UARTCharPut(UARTA0_BASE, c); +#else +#define MG_UART_WRITE(fd, buf, len) +#endif /* CS_PLATFORM == CS_P_CC3200 */ +#endif /* !MG_UART_CHAR_PUT */ + +enum fd_type { + FD_INVALID, + FD_SYS, +#ifdef CC3200_FS_SPIFFS + FD_SPIFFS, +#endif +#ifdef MG_FS_SLFS + FD_SLFS +#endif +}; +static int fd_type(int fd) { + if (fd >= 0 && fd < NUM_SYS_FDS) return FD_SYS; +#ifdef CC3200_FS_SPIFFS + if (fd >= SPIFFS_FD_BASE && fd < SPIFFS_FD_BASE + MAX_OPEN_SPIFFS_FILES) { + return FD_SPIFFS; + } +#endif +#ifdef MG_FS_SLFS + if (fd >= SLFS_FD_BASE && fd < SLFS_FD_BASE + MAX_OPEN_SLFS_FILES) { + return FD_SLFS; + } +#endif + return FD_INVALID; +} + +#if MG_TI_NO_HOST_INTERFACE +int open(const char *pathname, unsigned flags, int mode) { +#else +int _open(const char *pathname, int flags, mode_t mode) { +#endif + int fd = -1; + bool is_sl; + const char *fname = drop_dir(pathname, &is_sl); + if (is_sl) { +#ifdef MG_FS_SLFS + fd = fs_slfs_open(fname, flags, mode); + if (fd >= 0) fd += SLFS_FD_BASE; +#endif + } else { +#ifdef CC3200_FS_SPIFFS + fd = fs_spiffs_open(fname, flags, mode); + if (fd >= 0) fd += SPIFFS_FD_BASE; +#endif + } + LOG(LL_DEBUG, + ("open(%s, 0x%x) = %d, fname = %s", pathname, flags, fd, fname)); + return fd; +} + +int _stat(const char *pathname, struct stat *st) { + int res = -1; + bool is_sl; + const char *fname = drop_dir(pathname, &is_sl); + memset(st, 0, sizeof(*st)); + /* Simulate statting the root directory. */ + if (fname[0] == '\0' || strcmp(fname, ".") == 0) { + st->st_ino = 0; + st->st_mode = S_IFDIR | 0777; + st->st_nlink = 1; + st->st_size = 0; + return 0; + } + if (is_sl) { +#ifdef MG_FS_SLFS + res = fs_slfs_stat(fname, st); +#endif + } else { +#ifdef CC3200_FS_SPIFFS + res = fs_spiffs_stat(fname, st); +#endif + } + LOG(LL_DEBUG, ("stat(%s) = %d; fname = %s", pathname, res, fname)); + return res; +} + +#if MG_TI_NO_HOST_INTERFACE +int close(int fd) { +#else +int _close(int fd) { +#endif + int r = -1; + switch (fd_type(fd)) { + case FD_INVALID: + r = set_errno(EBADF); + break; + case FD_SYS: + r = set_errno(EACCES); + break; +#ifdef CC3200_FS_SPIFFS + case FD_SPIFFS: + r = fs_spiffs_close(fd - SPIFFS_FD_BASE); + break; +#endif +#ifdef MG_FS_SLFS + case FD_SLFS: + r = fs_slfs_close(fd - SLFS_FD_BASE); + break; +#endif + } + DBG(("close(%d) = %d", fd, r)); + return r; +} + +#if MG_TI_NO_HOST_INTERFACE +off_t lseek(int fd, off_t offset, int whence) { +#else +off_t _lseek(int fd, off_t offset, int whence) { +#endif + int r = -1; + switch (fd_type(fd)) { + case FD_INVALID: + r = set_errno(EBADF); + break; + case FD_SYS: + r = set_errno(ESPIPE); + break; +#ifdef CC3200_FS_SPIFFS + case FD_SPIFFS: + r = fs_spiffs_lseek(fd - SPIFFS_FD_BASE, offset, whence); + break; +#endif +#ifdef MG_FS_SLFS + case FD_SLFS: + r = fs_slfs_lseek(fd - SLFS_FD_BASE, offset, whence); + break; +#endif + } + DBG(("lseek(%d, %d, %d) = %d", fd, (int) offset, whence, r)); + return r; +} + +int _fstat(int fd, struct stat *s) { + int r = -1; + memset(s, 0, sizeof(*s)); + switch (fd_type(fd)) { + case FD_INVALID: + r = set_errno(EBADF); + break; + case FD_SYS: { + /* Create barely passable stats for STD{IN,OUT,ERR}. */ + memset(s, 0, sizeof(*s)); + s->st_ino = fd; + s->st_mode = S_IFCHR | 0666; + r = 0; + break; + } +#ifdef CC3200_FS_SPIFFS + case FD_SPIFFS: + r = fs_spiffs_fstat(fd - SPIFFS_FD_BASE, s); + break; +#endif +#ifdef MG_FS_SLFS + case FD_SLFS: + r = fs_slfs_fstat(fd - SLFS_FD_BASE, s); + break; +#endif + } + DBG(("fstat(%d) = %d", fd, r)); + return r; +} + +#if MG_TI_NO_HOST_INTERFACE +int read(int fd, char *buf, unsigned count) { +#else +ssize_t _read(int fd, void *buf, size_t count) { +#endif + int r = -1; + switch (fd_type(fd)) { + case FD_INVALID: + r = set_errno(EBADF); + break; + case FD_SYS: { + if (fd != 0) { + r = set_errno(EACCES); + break; + } + /* Should we allow reading from stdin = uart? */ + r = set_errno(ENOTSUP); + break; + } +#ifdef CC3200_FS_SPIFFS + case FD_SPIFFS: + r = fs_spiffs_read(fd - SPIFFS_FD_BASE, buf, count); + break; +#endif +#ifdef MG_FS_SLFS + case FD_SLFS: + r = fs_slfs_read(fd - SLFS_FD_BASE, buf, count); + break; +#endif + } + DBG(("read(%d, %u) = %d", fd, count, r)); + return r; +} + +#if MG_TI_NO_HOST_INTERFACE +int write(int fd, const char *buf, unsigned count) { +#else +ssize_t _write(int fd, const void *buf, size_t count) { +#endif + int r = -1; + switch (fd_type(fd)) { + case FD_INVALID: + r = set_errno(EBADF); + break; + case FD_SYS: { + if (fd == 0) { + r = set_errno(EACCES); + break; + } +#ifdef MG_UART_WRITE + MG_UART_WRITE(fd, buf, count); +#elif defined(MG_UART_CHAR_PUT) + { + size_t i; + for (i = 0; i < count; i++) { + const char c = ((const char *) buf)[i]; + if (c == '\n') MG_UART_CHAR_PUT(fd, '\r'); + MG_UART_CHAR_PUT(fd, c); + } + } +#endif + r = count; + break; + } +#ifdef CC3200_FS_SPIFFS + case FD_SPIFFS: + r = fs_spiffs_write(fd - SPIFFS_FD_BASE, buf, count); + break; +#endif +#ifdef MG_FS_SLFS + case FD_SLFS: + r = fs_slfs_write(fd - SLFS_FD_BASE, buf, count); + break; +#endif + } + return r; +} + +/* + * On Newlib we override rename directly too, because the default + * implementation using _link and _unlink doesn't work for us. + */ +#if MG_TI_NO_HOST_INTERFACE || defined(_NEWLIB_VERSION) +int rename(const char *frompath, const char *topath) { + int r = -1; + bool is_sl_from, is_sl_to; + const char *from = drop_dir(frompath, &is_sl_from); + const char *to = drop_dir(topath, &is_sl_to); + if (is_sl_from || is_sl_to) { + set_errno(ENOTSUP); + } else { +#ifdef CC3200_FS_SPIFFS + r = fs_spiffs_rename(from, to); +#endif + } + DBG(("rename(%s, %s) = %d", from, to, r)); + return r; +} +#endif /* MG_TI_NO_HOST_INTERFACE || defined(_NEWLIB_VERSION) */ + +#if MG_TI_NO_HOST_INTERFACE +int unlink(const char *pathname) { +#else +int _unlink(const char *pathname) { +#endif + int r = -1; + bool is_sl; + const char *fname = drop_dir(pathname, &is_sl); + if (is_sl) { +#ifdef MG_FS_SLFS + r = fs_slfs_unlink(fname); +#endif + } else { +#ifdef CC3200_FS_SPIFFS + r = fs_spiffs_unlink(fname); +#endif + } + DBG(("unlink(%s) = %d, fname = %s", pathname, r, fname)); + return r; +} + +#ifdef CC3200_FS_SPIFFS /* FailFS does not support listing files. */ +DIR *opendir(const char *dir_name) { + DIR *r = NULL; + bool is_sl; + drop_dir(dir_name, &is_sl); + if (is_sl) { + r = NULL; + set_errno(ENOTSUP); + } else { + r = fs_spiffs_opendir(dir_name); + } + DBG(("opendir(%s) = %p", dir_name, r)); + return r; +} + +struct dirent *readdir(DIR *dir) { + struct dirent *res = fs_spiffs_readdir(dir); + DBG(("readdir(%p) = %p", dir, res)); + return res; +} + +int closedir(DIR *dir) { + int res = fs_spiffs_closedir(dir); + DBG(("closedir(%p) = %d", dir, res)); + return res; +} + +int rmdir(const char *path) { + return fs_spiffs_rmdir(path); +} + +int mkdir(const char *path, mode_t mode) { + (void) path; + (void) mode; + /* for spiffs supports only root dir, which comes from mongoose as '.' */ + return (strlen(path) == 1 && *path == '.') ? 0 : ENOTDIR; +} +#endif + +int sl_fs_init(void) { + int ret = 1; +#ifdef __TI_COMPILER_VERSION__ +#ifdef MG_FS_SLFS +#pragma diag_push +#pragma diag_suppress 169 /* Nothing we can do about the prototype mismatch. \ + */ + ret = (add_device("SL", _MSA, fs_slfs_open, fs_slfs_close, fs_slfs_read, + fs_slfs_write, fs_slfs_lseek, fs_slfs_unlink, + fs_slfs_rename) == 0); +#pragma diag_pop +#endif +#endif + return ret; +} + +#endif /* !defined(MG_FS_NO_VFS) */ +#endif /* MG_NET_IF == MG_NET_IF_SIMPLELINK && (defined(MG_FS_SLFS) || \ + defined(MG_FS_SPIFFS)) */ +#ifdef MG_MODULE_LINES +#line 1 "common/platforms/simplelink/sl_socket.c" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +#if MG_NET_IF == MG_NET_IF_SIMPLELINK + +#include <errno.h> +#include <stdio.h> + +/* Amalgamated: #include "common/platform.h" */ + +const char *inet_ntop(int af, const void *src, char *dst, socklen_t size) { + int res; + struct in_addr *in = (struct in_addr *) src; + if (af != AF_INET) { + errno = ENOTSUP; + return NULL; + } + res = snprintf(dst, size, "%lu.%lu.%lu.%lu", SL_IPV4_BYTE(in->s_addr, 0), + SL_IPV4_BYTE(in->s_addr, 1), SL_IPV4_BYTE(in->s_addr, 2), + SL_IPV4_BYTE(in->s_addr, 3)); + return res > 0 ? dst : NULL; +} + +char *inet_ntoa(struct in_addr n) { + static char a[16]; + return (char *) inet_ntop(AF_INET, &n, a, sizeof(a)); +} + +int inet_pton(int af, const char *src, void *dst) { + uint32_t a0, a1, a2, a3; + uint8_t *db = (uint8_t *) dst; + if (af != AF_INET) { + errno = ENOTSUP; + return 0; + } + if (sscanf(src, "%lu.%lu.%lu.%lu", &a0, &a1, &a2, &a3) != 4) { + return 0; + } + *db = a3; + *(db + 1) = a2; + *(db + 2) = a1; + *(db + 3) = a0; + return 1; +} + +#endif /* MG_NET_IF == MG_NET_IF_SIMPLELINK */ +#ifdef MG_MODULE_LINES +#line 1 "common/platforms/simplelink/sl_mg_task.c" +#endif +#if MG_NET_IF == MG_NET_IF_SIMPLELINK && !defined(MG_SIMPLELINK_NO_OSI) + +/* Amalgamated: #include "mg_task.h" */ + +#include <oslib/osi.h> + +enum mg_q_msg_type { + MG_Q_MSG_CB, +}; +struct mg_q_msg { + enum mg_q_msg_type type; + void (*cb)(struct mg_mgr *mgr, void *arg); + void *arg; +}; +static OsiMsgQ_t s_mg_q; +static void mg_task(void *arg); + +bool mg_start_task(int priority, int stack_size, mg_init_cb mg_init) { + if (osi_MsgQCreate(&s_mg_q, "MG", sizeof(struct mg_q_msg), 16) != OSI_OK) { + return false; + } + if (osi_TaskCreate(mg_task, (const signed char *) "MG", stack_size, + (void *) mg_init, priority, NULL) != OSI_OK) { + return false; + } + return true; +} + +static void mg_task(void *arg) { + struct mg_mgr mgr; + mg_init_cb mg_init = (mg_init_cb) arg; + mg_mgr_init(&mgr, NULL); + mg_init(&mgr); + while (1) { + struct mg_q_msg msg; + mg_mgr_poll(&mgr, 1); + if (osi_MsgQRead(&s_mg_q, &msg, 1) != OSI_OK) continue; + switch (msg.type) { + case MG_Q_MSG_CB: { + msg.cb(&mgr, msg.arg); + } + } + } +} + +void mg_run_in_task(void (*cb)(struct mg_mgr *mgr, void *arg), void *cb_arg) { + struct mg_q_msg msg = {MG_Q_MSG_CB, cb, cb_arg}; + osi_MsgQWrite(&s_mg_q, &msg, OSI_NO_WAIT); +} + +#endif /* MG_NET_IF == MG_NET_IF_SIMPLELINK && !defined(MG_SIMPLELINK_NO_OSI) \ + */ +#ifdef MG_MODULE_LINES +#line 1 "common/platforms/simplelink/sl_net_if.h" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +#ifndef CS_COMMON_PLATFORMS_SIMPLELINK_SL_NET_IF_H_ +#define CS_COMMON_PLATFORMS_SIMPLELINK_SL_NET_IF_H_ + +/* Amalgamated: #include "mongoose/src/net_if.h" */ + +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +#ifndef MG_ENABLE_NET_IF_SIMPLELINK +#define MG_ENABLE_NET_IF_SIMPLELINK MG_NET_IF == MG_NET_IF_SIMPLELINK +#endif + +extern const struct mg_iface_vtable mg_simplelink_iface_vtable; + +#ifdef __cplusplus +} +#endif /* __cplusplus */ + +#endif /* CS_COMMON_PLATFORMS_SIMPLELINK_SL_NET_IF_H_ */ +#ifdef MG_MODULE_LINES +#line 1 "common/platforms/simplelink/sl_net_if.c" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +/* Amalgamated: #include "common/platforms/simplelink/sl_net_if.h" */ + +#if MG_ENABLE_NET_IF_SIMPLELINK + +/* Amalgamated: #include "mongoose/src/internal.h" */ +/* Amalgamated: #include "mongoose/src/util.h" */ + +#define MG_TCP_RECV_BUFFER_SIZE 1024 +#define MG_UDP_RECV_BUFFER_SIZE 1500 + +static sock_t mg_open_listening_socket(struct mg_connection *nc, + union socket_address *sa, int type, + int proto); + +void mg_set_non_blocking_mode(sock_t sock) { + SlSockNonblocking_t opt; +#if SL_MAJOR_VERSION_NUM < 2 + opt.NonblockingEnabled = 1; +#else + opt.NonBlockingEnabled = 1; +#endif + sl_SetSockOpt(sock, SL_SOL_SOCKET, SL_SO_NONBLOCKING, &opt, sizeof(opt)); +} + +static int mg_is_error(int n) { + return (n < 0 && n != SL_ERROR_BSD_EALREADY && n != SL_ERROR_BSD_EAGAIN); +} + +void mg_sl_if_connect_tcp(struct mg_connection *nc, + const union socket_address *sa) { + int proto = 0; + if (nc->flags & MG_F_SSL) proto = SL_SEC_SOCKET; + sock_t sock = sl_Socket(AF_INET, SOCK_STREAM, proto); + if (sock < 0) { + nc->err = sock; + goto out; + } + mg_sock_set(nc, sock); +#if MG_ENABLE_SSL + nc->err = sl_set_ssl_opts(sock, nc); + if (nc->err != 0) goto out; +#endif + nc->err = sl_Connect(sock, &sa->sa, sizeof(sa->sin)); +out: + DBG(("%p to %s:%d sock %d %d err %d", nc, inet_ntoa(sa->sin.sin_addr), + ntohs(sa->sin.sin_port), nc->sock, proto, nc->err)); +} + +void mg_sl_if_connect_udp(struct mg_connection *nc) { + sock_t sock = sl_Socket(AF_INET, SOCK_DGRAM, 0); + if (sock < 0) { + nc->err = sock; + return; + } + mg_sock_set(nc, sock); + nc->err = 0; +} + +int mg_sl_if_listen_tcp(struct mg_connection *nc, union socket_address *sa) { + int proto = 0; + if (nc->flags & MG_F_SSL) proto = SL_SEC_SOCKET; + sock_t sock = mg_open_listening_socket(nc, sa, SOCK_STREAM, proto); + if (sock < 0) return sock; + mg_sock_set(nc, sock); + return 0; +} + +int mg_sl_if_listen_udp(struct mg_connection *nc, union socket_address *sa) { + sock_t sock = mg_open_listening_socket(nc, sa, SOCK_DGRAM, 0); + if (sock == INVALID_SOCKET) return (errno ? errno : 1); + mg_sock_set(nc, sock); + return 0; +} + +void mg_sl_if_tcp_send(struct mg_connection *nc, const void *buf, size_t len) { + mbuf_append(&nc->send_mbuf, buf, len); +} + +void mg_sl_if_udp_send(struct mg_connection *nc, const void *buf, size_t len) { + mbuf_append(&nc->send_mbuf, buf, len); +} + +void mg_sl_if_recved(struct mg_connection *nc, size_t len) { + (void) nc; + (void) len; +} + +int mg_sl_if_create_conn(struct mg_connection *nc) { + (void) nc; + return 1; +} + +void mg_sl_if_destroy_conn(struct mg_connection *nc) { + if (nc->sock == INVALID_SOCKET) return; + /* For UDP, only close outgoing sockets or listeners. */ + if (!(nc->flags & MG_F_UDP) || nc->listener == NULL) { + sl_Close(nc->sock); + } + nc->sock = INVALID_SOCKET; +} + +static int mg_accept_conn(struct mg_connection *lc) { + struct mg_connection *nc; + union socket_address sa; + socklen_t sa_len = sizeof(sa); + sock_t sock = sl_Accept(lc->sock, &sa.sa, &sa_len); + if (sock < 0) { + DBG(("%p: failed to accept: %d", lc, sock)); + return 0; + } + nc = mg_if_accept_new_conn(lc); + if (nc == NULL) { + sl_Close(sock); + return 0; + } + DBG(("%p conn from %s:%d", nc, inet_ntoa(sa.sin.sin_addr), + ntohs(sa.sin.sin_port))); + mg_sock_set(nc, sock); + if (nc->flags & MG_F_SSL) nc->flags |= MG_F_SSL_HANDSHAKE_DONE; + mg_if_accept_tcp_cb(nc, &sa, sa_len); + return 1; +} + +/* 'sa' must be an initialized address to bind to */ +static sock_t mg_open_listening_socket(struct mg_connection *nc, + union socket_address *sa, int type, + int proto) { + int r; + socklen_t sa_len = + (sa->sa.sa_family == AF_INET) ? sizeof(sa->sin) : sizeof(sa->sin6); + sock_t sock = sl_Socket(sa->sa.sa_family, type, proto); + if (sock < 0) return sock; + if ((r = sl_Bind(sock, &sa->sa, sa_len)) < 0) goto clean; + if (type != SOCK_DGRAM) { +#if MG_ENABLE_SSL + if ((r = sl_set_ssl_opts(sock, nc)) < 0) goto clean; +#endif + if ((r = sl_Listen(sock, SOMAXCONN)) < 0) goto clean; + } + mg_set_non_blocking_mode(sock); +clean: + if (r < 0) { + sl_Close(sock); + sock = r; + } + return sock; +} + +static void mg_write_to_socket(struct mg_connection *nc) { + struct mbuf *io = &nc->send_mbuf; + int n = 0; + + if (nc->flags & MG_F_UDP) { + n = sl_SendTo(nc->sock, io->buf, io->len, 0, &nc->sa.sa, + sizeof(nc->sa.sin)); + DBG(("%p %d %d %d %s:%hu", nc, nc->sock, n, errno, + inet_ntoa(nc->sa.sin.sin_addr), ntohs(nc->sa.sin.sin_port))); + } else { + n = (int) sl_Send(nc->sock, io->buf, io->len, 0); + DBG(("%p %d bytes -> %d", nc, n, nc->sock)); + } + + if (n > 0) { + mg_if_sent_cb(nc, n); + } else if (n < 0 && mg_is_error(n)) { + /* Something went wrong, drop the connection. */ + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + } +} + +MG_INTERNAL size_t recv_avail_size(struct mg_connection *conn, size_t max) { + size_t avail; + if (conn->recv_mbuf_limit < conn->recv_mbuf.len) return 0; + avail = conn->recv_mbuf_limit - conn->recv_mbuf.len; + return avail > max ? max : avail; +} + +static void mg_handle_tcp_read(struct mg_connection *conn) { + int n = 0; + char *buf = (char *) MG_MALLOC(MG_TCP_RECV_BUFFER_SIZE); + + if (buf == NULL) { + DBG(("OOM")); + return; + } + + n = (int) sl_Recv(conn->sock, buf, + recv_avail_size(conn, MG_TCP_RECV_BUFFER_SIZE), 0); + DBG(("%p %d bytes <- %d", conn, n, conn->sock)); + if (n > 0) { + mg_if_recv_tcp_cb(conn, buf, n, 1 /* own */); + } else { + MG_FREE(buf); + } + if (n == 0) { + /* Orderly shutdown of the socket, try flushing output. */ + conn->flags |= MG_F_SEND_AND_CLOSE; + } else if (mg_is_error(n)) { + conn->flags |= MG_F_CLOSE_IMMEDIATELY; + } +} + +static void mg_handle_udp_read(struct mg_connection *nc) { + char *buf = (char *) MG_MALLOC(MG_UDP_RECV_BUFFER_SIZE); + if (buf == NULL) return; + union socket_address sa; + socklen_t sa_len = sizeof(sa); + int n = sl_RecvFrom(nc->sock, buf, MG_UDP_RECV_BUFFER_SIZE, 0, + (SlSockAddr_t *) &sa, &sa_len); + DBG(("%p %d bytes from %s:%d", nc, n, inet_ntoa(nc->sa.sin.sin_addr), + ntohs(nc->sa.sin.sin_port))); + if (n > 0) { + mg_if_recv_udp_cb(nc, buf, n, &sa, sa_len); + } else { + MG_FREE(buf); + } +} + +#define _MG_F_FD_CAN_READ 1 +#define _MG_F_FD_CAN_WRITE 1 << 1 +#define _MG_F_FD_ERROR 1 << 2 + +void mg_mgr_handle_conn(struct mg_connection *nc, int fd_flags, double now) { + DBG(("%p fd=%d fd_flags=%d nc_flags=%lu rmbl=%d smbl=%d", nc, nc->sock, + fd_flags, nc->flags, (int) nc->recv_mbuf.len, (int) nc->send_mbuf.len)); + + if (nc->flags & MG_F_CONNECTING) { + if (nc->flags & MG_F_UDP || nc->err != SL_ERROR_BSD_EALREADY) { + mg_if_connect_cb(nc, nc->err); + } else { + /* In SimpleLink, to get status of non-blocking connect() we need to wait + * until socket is writable and repeat the call to sl_Connect again, + * which will now return the real status. */ + if (fd_flags & _MG_F_FD_CAN_WRITE) { + nc->err = sl_Connect(nc->sock, &nc->sa.sa, sizeof(nc->sa.sin)); + DBG(("%p conn res=%d", nc, nc->err)); + if (nc->err == SL_ERROR_BSD_ESECSNOVERIFY || + /* TODO(rojer): Provide API to set the date for verification. */ + nc->err == SL_ERROR_BSD_ESECDATEERROR +#if SL_MAJOR_VERSION_NUM >= 2 + /* Per SWRU455, this error does not mean verification failed, + * it only means that the cert used is not present in the trusted + * root CA catalog. Which is perfectly fine. */ + || + nc->err == SL_ERROR_BSD_ESECUNKNOWNROOTCA +#endif + ) { + nc->err = 0; + } + if (nc->flags & MG_F_SSL && nc->err == 0) { + nc->flags |= MG_F_SSL_HANDSHAKE_DONE; + } + mg_if_connect_cb(nc, nc->err); + } + } + /* Ignore read/write in further processing, we've handled it. */ + fd_flags &= ~(_MG_F_FD_CAN_READ | _MG_F_FD_CAN_WRITE); + } + + if (fd_flags & _MG_F_FD_CAN_READ) { + if (nc->flags & MG_F_UDP) { + mg_handle_udp_read(nc); + } else { + if (nc->flags & MG_F_LISTENING) { + mg_accept_conn(nc); + } else { + mg_handle_tcp_read(nc); + } + } + } + + if (!(nc->flags & MG_F_CLOSE_IMMEDIATELY)) { + if ((fd_flags & _MG_F_FD_CAN_WRITE) && nc->send_mbuf.len > 0) { + mg_write_to_socket(nc); + } + + if (!(fd_flags & (_MG_F_FD_CAN_READ | _MG_F_FD_CAN_WRITE))) { + mg_if_poll(nc, now); + } + mg_if_timer(nc, now); + } + + DBG(("%p after fd=%d nc_flags=%lu rmbl=%d smbl=%d", nc, nc->sock, nc->flags, + (int) nc->recv_mbuf.len, (int) nc->send_mbuf.len)); +} + +/* Associate a socket to a connection. */ +void mg_sl_if_sock_set(struct mg_connection *nc, sock_t sock) { + mg_set_non_blocking_mode(sock); + nc->sock = sock; + DBG(("%p %d", nc, sock)); +} + +void mg_sl_if_init(struct mg_iface *iface) { + (void) iface; + DBG(("%p using sl_Select()", iface->mgr)); +} + +void mg_sl_if_free(struct mg_iface *iface) { + (void) iface; +} + +void mg_sl_if_add_conn(struct mg_connection *nc) { + (void) nc; +} + +void mg_sl_if_remove_conn(struct mg_connection *nc) { + (void) nc; +} + +time_t mg_sl_if_poll(struct mg_iface *iface, int timeout_ms) { + struct mg_mgr *mgr = iface->mgr; + double now = mg_time(); + double min_timer; + struct mg_connection *nc, *tmp; + struct SlTimeval_t tv; + SlFdSet_t read_set, write_set, err_set; + sock_t max_fd = INVALID_SOCKET; + int num_fds, num_ev = 0, num_timers = 0; + + SL_SOCKET_FD_ZERO(&read_set); + SL_SOCKET_FD_ZERO(&write_set); + SL_SOCKET_FD_ZERO(&err_set); + + /* + * Note: it is ok to have connections with sock == INVALID_SOCKET in the list, + * e.g. timer-only "connections". + */ + min_timer = 0; + for (nc = mgr->active_connections, num_fds = 0; nc != NULL; nc = tmp) { + tmp = nc->next; + + if (nc->sock != INVALID_SOCKET) { + num_fds++; + + if (!(nc->flags & MG_F_WANT_WRITE) && + nc->recv_mbuf.len < nc->recv_mbuf_limit && + (!(nc->flags & MG_F_UDP) || nc->listener == NULL)) { + SL_SOCKET_FD_SET(nc->sock, &read_set); + if (max_fd == INVALID_SOCKET || nc->sock > max_fd) max_fd = nc->sock; + } + + if (((nc->flags & MG_F_CONNECTING) && !(nc->flags & MG_F_WANT_READ)) || + (nc->send_mbuf.len > 0 && !(nc->flags & MG_F_CONNECTING))) { + SL_SOCKET_FD_SET(nc->sock, &write_set); + SL_SOCKET_FD_SET(nc->sock, &err_set); + if (max_fd == INVALID_SOCKET || nc->sock > max_fd) max_fd = nc->sock; + } + } + + if (nc->ev_timer_time > 0) { + if (num_timers == 0 || nc->ev_timer_time < min_timer) { + min_timer = nc->ev_timer_time; + } + num_timers++; + } + } + + /* + * If there is a timer to be fired earlier than the requested timeout, + * adjust the timeout. + */ + if (num_timers > 0) { + double timer_timeout_ms = (min_timer - mg_time()) * 1000 + 1 /* rounding */; + if (timer_timeout_ms < timeout_ms) { + timeout_ms = timer_timeout_ms; + } + } + if (timeout_ms < 0) timeout_ms = 0; + + tv.tv_sec = timeout_ms / 1000; + tv.tv_usec = (timeout_ms % 1000) * 1000; + + if (num_fds > 0) { + num_ev = sl_Select((int) max_fd + 1, &read_set, &write_set, &err_set, &tv); + } + + now = mg_time(); + DBG(("sl_Select @ %ld num_ev=%d of %d, timeout=%d", (long) now, num_ev, + num_fds, timeout_ms)); + + for (nc = mgr->active_connections; nc != NULL; nc = tmp) { + int fd_flags = 0; + if (nc->sock != INVALID_SOCKET) { + if (num_ev > 0) { + fd_flags = + (SL_SOCKET_FD_ISSET(nc->sock, &read_set) && + (!(nc->flags & MG_F_UDP) || nc->listener == NULL) + ? _MG_F_FD_CAN_READ + : 0) | + (SL_SOCKET_FD_ISSET(nc->sock, &write_set) ? _MG_F_FD_CAN_WRITE + : 0) | + (SL_SOCKET_FD_ISSET(nc->sock, &err_set) ? _MG_F_FD_ERROR : 0); + } + /* SimpleLink does not report UDP sockets as writable. */ + if (nc->flags & MG_F_UDP && nc->send_mbuf.len > 0) { + fd_flags |= _MG_F_FD_CAN_WRITE; + } + } + tmp = nc->next; + mg_mgr_handle_conn(nc, fd_flags, now); + } + + for (nc = mgr->active_connections; nc != NULL; nc = tmp) { + tmp = nc->next; + if ((nc->flags & MG_F_CLOSE_IMMEDIATELY) || + (nc->send_mbuf.len == 0 && (nc->flags & MG_F_SEND_AND_CLOSE))) { + mg_close_conn(nc); + } + } + + return now; +} + +void mg_sl_if_get_conn_addr(struct mg_connection *nc, int remote, + union socket_address *sa) { + /* SimpleLink does not provide a way to get socket's peer address after + * accept or connect. Address should have been preserved in the connection, + * so we do our best here by using it. */ + if (remote) memcpy(sa, &nc->sa, sizeof(*sa)); +} + +void sl_restart_cb(struct mg_mgr *mgr) { + /* + * SimpleLink has been restarted, meaning all sockets have been invalidated. + * We try our best - we'll restart the listeners, but for outgoing + * connections we have no option but to terminate. + */ + struct mg_connection *nc; + for (nc = mg_next(mgr, NULL); nc != NULL; nc = mg_next(mgr, nc)) { + if (nc->sock == INVALID_SOCKET) continue; /* Could be a timer */ + if (nc->flags & MG_F_LISTENING) { + DBG(("restarting %p %s:%d", nc, inet_ntoa(nc->sa.sin.sin_addr), + ntohs(nc->sa.sin.sin_port))); + int res = (nc->flags & MG_F_UDP ? mg_sl_if_listen_udp(nc, &nc->sa) + : mg_sl_if_listen_tcp(nc, &nc->sa)); + if (res == 0) continue; + /* Well, we tried and failed. Fall through to closing. */ + } + nc->sock = INVALID_SOCKET; + DBG(("terminating %p %s:%d", nc, inet_ntoa(nc->sa.sin.sin_addr), + ntohs(nc->sa.sin.sin_port))); + /* TODO(rojer): Outgoing UDP? */ + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + } +} + +/* clang-format off */ +#define MG_SL_IFACE_VTABLE \ + { \ + mg_sl_if_init, \ + mg_sl_if_free, \ + mg_sl_if_add_conn, \ + mg_sl_if_remove_conn, \ + mg_sl_if_poll, \ + mg_sl_if_listen_tcp, \ + mg_sl_if_listen_udp, \ + mg_sl_if_connect_tcp, \ + mg_sl_if_connect_udp, \ + mg_sl_if_tcp_send, \ + mg_sl_if_udp_send, \ + mg_sl_if_recved, \ + mg_sl_if_create_conn, \ + mg_sl_if_destroy_conn, \ + mg_sl_if_sock_set, \ + mg_sl_if_get_conn_addr, \ + } +/* clang-format on */ + +const struct mg_iface_vtable mg_simplelink_iface_vtable = MG_SL_IFACE_VTABLE; +#if MG_NET_IF == MG_NET_IF_SIMPLELINK +const struct mg_iface_vtable mg_default_iface_vtable = MG_SL_IFACE_VTABLE; +#endif + +#endif /* MG_ENABLE_NET_IF_SIMPLELINK */ +#ifdef MG_MODULE_LINES +#line 1 "common/platforms/simplelink/sl_ssl_if.c" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +#if MG_ENABLE_SSL && MG_SSL_IF == MG_SSL_IF_SIMPLELINK + +/* Amalgamated: #include "common/mg_mem.h" */ + +#ifndef MG_SSL_IF_SIMPLELINK_SLFS_PREFIX +#define MG_SSL_IF_SIMPLELINK_SLFS_PREFIX "SL:" +#endif + +#define MG_SSL_IF_SIMPLELINK_SLFS_PREFIX_LEN \ + (sizeof(MG_SSL_IF_SIMPLELINK_SLFS_PREFIX) - 1) + +struct mg_ssl_if_ctx { + char *ssl_cert; + char *ssl_key; + char *ssl_ca_cert; + char *ssl_server_name; +}; + +void mg_ssl_if_init() { +} + +enum mg_ssl_if_result mg_ssl_if_conn_init( + struct mg_connection *nc, const struct mg_ssl_if_conn_params *params, + const char **err_msg) { + struct mg_ssl_if_ctx *ctx = + (struct mg_ssl_if_ctx *) MG_CALLOC(1, sizeof(*ctx)); + if (ctx == NULL) { + MG_SET_PTRPTR(err_msg, "Out of memory"); + return MG_SSL_ERROR; + } + nc->ssl_if_data = ctx; + + if (params->cert != NULL || params->key != NULL) { + if (params->cert != NULL && params->key != NULL) { + ctx->ssl_cert = strdup(params->cert); + ctx->ssl_key = strdup(params->key); + } else { + MG_SET_PTRPTR(err_msg, "Both cert and key are required."); + return MG_SSL_ERROR; + } + } + if (params->ca_cert != NULL && strcmp(params->ca_cert, "*") != 0) { + ctx->ssl_ca_cert = strdup(params->ca_cert); + } + /* TODO(rojer): cipher_suites. */ + if (params->server_name != NULL) { + ctx->ssl_server_name = strdup(params->server_name); + } + return MG_SSL_OK; +} + +void mg_ssl_if_conn_close_notify(struct mg_connection *nc) { + /* Nothing to do */ + (void) nc; +} + +void mg_ssl_if_conn_free(struct mg_connection *nc) { + struct mg_ssl_if_ctx *ctx = (struct mg_ssl_if_ctx *) nc->ssl_if_data; + if (ctx == NULL) return; + nc->ssl_if_data = NULL; + MG_FREE(ctx->ssl_cert); + MG_FREE(ctx->ssl_key); + MG_FREE(ctx->ssl_ca_cert); + MG_FREE(ctx->ssl_server_name); + memset(ctx, 0, sizeof(*ctx)); + MG_FREE(ctx); +} + +bool pem_to_der(const char *pem_file, const char *der_file) { + bool ret = false; + FILE *pf = NULL, *df = NULL; + bool writing = false; + pf = fopen(pem_file, "r"); + if (pf == NULL) goto clean; + remove(der_file); + fs_slfs_set_new_file_size(der_file + MG_SSL_IF_SIMPLELINK_SLFS_PREFIX_LEN, + 2048); + df = fopen(der_file, "w"); + if (df == NULL) goto clean; + while (1) { + char pem_buf[70]; + char der_buf[48]; + if (!fgets(pem_buf, sizeof(pem_buf), pf)) break; + if (writing) { + if (strstr(pem_buf, "-----END ") != NULL) { + ret = true; + break; + } + int l = 0; + while (!isspace((unsigned int) pem_buf[l])) l++; + int der_len = 0; + cs_base64_decode((const unsigned char *) pem_buf, sizeof(pem_buf), + der_buf, &der_len); + if (der_len <= 0) break; + if (fwrite(der_buf, 1, der_len, df) != der_len) break; + } else if (strstr(pem_buf, "-----BEGIN ") != NULL) { + writing = true; + } + } + +clean: + if (pf != NULL) fclose(pf); + if (df != NULL) { + fclose(df); + if (!ret) remove(der_file); + } + return ret; +} + +#if MG_ENABLE_FILESYSTEM && defined(MG_FS_SLFS) +/* If the file's extension is .pem, convert it to DER format and put on SLFS. */ +static char *sl_pem2der(const char *pem_file) { + const char *pem_ext = strstr(pem_file, ".pem"); + if (pem_ext == NULL || *(pem_ext + 4) != '\0') { + return strdup(pem_file); + } + char *der_file = NULL; + /* DER file must be located on SLFS, add prefix. */ + int l = mg_asprintf(&der_file, 0, MG_SSL_IF_SIMPLELINK_SLFS_PREFIX "%.*s.der", + (int) (pem_ext - pem_file), pem_file); + if (der_file == NULL) return NULL; + bool result = false; + cs_stat_t st; + if (mg_stat(der_file, &st) != 0) { + result = pem_to_der(pem_file, der_file); + LOG(LL_DEBUG, ("%s -> %s = %d", pem_file, der_file, result)); + } else { + /* File exists, assume it's already been converted. */ + result = true; + } + if (result) { + /* Strip the SL: prefix we added since NWP does not expect it. */ + memmove(der_file, der_file + MG_SSL_IF_SIMPLELINK_SLFS_PREFIX_LEN, + l - 2 /* including \0 */); + } else { + MG_FREE(der_file); + der_file = NULL; + } + return der_file; +} +#else +static char *sl_pem2der(const char *pem_file) { + return strdup(pem_file); +} +#endif + +int sl_set_ssl_opts(int sock, struct mg_connection *nc) { + int err; + const struct mg_ssl_if_ctx *ctx = (struct mg_ssl_if_ctx *) nc->ssl_if_data; + DBG(("%p ssl ctx: %p", nc, ctx)); + + if (ctx != NULL) { + DBG(("%p %s,%s,%s,%s", nc, (ctx->ssl_cert ? ctx->ssl_cert : "-"), + (ctx->ssl_key ? ctx->ssl_cert : "-"), + (ctx->ssl_ca_cert ? ctx->ssl_ca_cert : "-"), + (ctx->ssl_server_name ? ctx->ssl_server_name : "-"))); + if (ctx->ssl_cert != NULL && ctx->ssl_key != NULL) { + char *ssl_cert = sl_pem2der(ctx->ssl_cert); + char *ssl_key = sl_pem2der(ctx->ssl_key); + if (ssl_cert != NULL && ssl_key != NULL) { + err = sl_SetSockOpt(sock, SL_SOL_SOCKET, + SL_SO_SECURE_FILES_CERTIFICATE_FILE_NAME, ssl_cert, + strlen(ssl_cert)); + LOG(LL_INFO, ("CERTIFICATE_FILE_NAME %s -> %d", ssl_cert, err)); + err = sl_SetSockOpt(sock, SL_SOL_SOCKET, + SL_SO_SECURE_FILES_PRIVATE_KEY_FILE_NAME, ssl_key, + strlen(ssl_key)); + LOG(LL_INFO, ("PRIVATE_KEY_FILE_NAME %s -> %d", ssl_key, err)); + } else { + err = -1; + } + MG_FREE(ssl_cert); + MG_FREE(ssl_key); + if (err != 0) return err; + } + if (ctx->ssl_ca_cert != NULL) { + if (ctx->ssl_ca_cert[0] != '\0') { + char *ssl_ca_cert = sl_pem2der(ctx->ssl_ca_cert); + if (ssl_ca_cert != NULL) { + err = sl_SetSockOpt(sock, SL_SOL_SOCKET, + SL_SO_SECURE_FILES_CA_FILE_NAME, ssl_ca_cert, + strlen(ssl_ca_cert)); + LOG(LL_INFO, ("CA_FILE_NAME %s -> %d", ssl_ca_cert, err)); + } else { + err = -1; + } + MG_FREE(ssl_ca_cert); + if (err != 0) return err; + } + } + if (ctx->ssl_server_name != NULL) { + err = sl_SetSockOpt(sock, SL_SOL_SOCKET, + SL_SO_SECURE_DOMAIN_NAME_VERIFICATION, + ctx->ssl_server_name, strlen(ctx->ssl_server_name)); + DBG(("DOMAIN_NAME_VERIFICATION %s -> %d", ctx->ssl_server_name, err)); + /* Domain name verificationw as added in a NWP service pack, older + * versions return SL_ERROR_BSD_ENOPROTOOPT. There isn't much we can do + * about it, + * so we ignore the error. */ + if (err != 0 && err != SL_ERROR_BSD_ENOPROTOOPT) return err; + } + } + return 0; +} + +#endif /* MG_ENABLE_SSL && MG_SSL_IF == MG_SSL_IF_SIMPLELINK */ +#ifdef MG_MODULE_LINES +#line 1 "common/platforms/lwip/mg_lwip_net_if.h" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +#ifndef CS_COMMON_PLATFORMS_LWIP_MG_NET_IF_LWIP_H_ +#define CS_COMMON_PLATFORMS_LWIP_MG_NET_IF_LWIP_H_ + +#ifndef MG_ENABLE_NET_IF_LWIP_LOW_LEVEL +#define MG_ENABLE_NET_IF_LWIP_LOW_LEVEL MG_NET_IF == MG_NET_IF_LWIP_LOW_LEVEL +#endif + +#if MG_ENABLE_NET_IF_LWIP_LOW_LEVEL + +#include <stdint.h> + +extern const struct mg_iface_vtable mg_lwip_iface_vtable; + +struct mg_lwip_conn_state { + struct mg_connection *nc; + struct mg_connection *lc; + union { + struct tcp_pcb *tcp; + struct udp_pcb *udp; + } pcb; + err_t err; + size_t num_sent; /* Number of acknowledged bytes to be reported to the core */ + struct pbuf *rx_chain; /* Chain of incoming data segments. */ + size_t rx_offset; /* Offset within the first pbuf (if partially consumed) */ + /* Last SSL write size, for retries. */ + int last_ssl_write_size; + /* Whether MG_SIG_RECV is already pending for this connection */ + int recv_pending : 1; + /* Whether the connection is about to close, just `rx_chain` needs to drain */ + int draining_rx_chain : 1; +}; + +enum mg_sig_type { + MG_SIG_CONNECT_RESULT = 1, + MG_SIG_RECV = 2, + MG_SIG_CLOSE_CONN = 3, + MG_SIG_TOMBSTONE = 4, + MG_SIG_ACCEPT = 5, +}; + +void mg_lwip_post_signal(enum mg_sig_type sig, struct mg_connection *nc); + +/* To be implemented by the platform. */ +void mg_lwip_mgr_schedule_poll(struct mg_mgr *mgr); + +#endif /* MG_ENABLE_NET_IF_LWIP_LOW_LEVEL */ + +#endif /* CS_COMMON_PLATFORMS_LWIP_MG_NET_IF_LWIP_H_ */ +#ifdef MG_MODULE_LINES +#line 1 "common/platforms/lwip/mg_lwip_net_if.c" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +#if MG_ENABLE_NET_IF_LWIP_LOW_LEVEL + +/* Amalgamated: #include "common/mg_mem.h" */ + +#include <lwip/init.h> +#include <lwip/pbuf.h> +#include <lwip/tcp.h> +#include <lwip/tcpip.h> +#if ((LWIP_VERSION_MAJOR << 8) | LWIP_VERSION_MINOR) >= 0x0105 +#include <lwip/priv/tcp_priv.h> /* For tcp_seg */ +#else +#include <lwip/tcp_impl.h> +#endif +#include <lwip/udp.h> + +/* Amalgamated: #include "common/cs_dbg.h" */ + +/* + * Newest versions of LWIP have ip_2_ip4, older have ipX_2_ip, + * even older have nothing. + */ +#ifndef ip_2_ip4 +#ifdef ipX_2_ip +#define ip_2_ip4(addr) ipX_2_ip(addr) +#else +#define ip_2_ip4(addr) (addr) +#endif +#endif + +/* + * Depending on whether Mongoose is compiled with ipv6 support, use right + * lwip functions + */ +#if MG_ENABLE_IPV6 +#define TCP_NEW tcp_new_ip6 +#define TCP_BIND tcp_bind_ip6 +#define UDP_BIND udp_bind_ip6 +#define IPADDR_NTOA(x) ip6addr_ntoa((const ip6_addr_t *)(x)) +#define SET_ADDR(dst, src) \ + memcpy((dst)->sin6.sin6_addr.s6_addr, (src)->ip6.addr, \ + sizeof((dst)->sin6.sin6_addr.s6_addr)) +#else +#define TCP_NEW tcp_new +#define TCP_BIND tcp_bind +#define UDP_BIND udp_bind +#define IPADDR_NTOA ipaddr_ntoa +#define SET_ADDR(dst, src) (dst)->sin.sin_addr.s_addr = ip_2_ip4(src)->addr +#endif + +#if NO_SYS +#define tcpip_callback(fn, arg) (fn)(arg) +typedef void (*tcpip_callback_fn)(void *arg); +#endif + +void mg_lwip_ssl_do_hs(struct mg_connection *nc); +void mg_lwip_ssl_send(struct mg_connection *nc); +void mg_lwip_ssl_recv(struct mg_connection *nc); + +void mg_lwip_if_init(struct mg_iface *iface); +void mg_lwip_if_free(struct mg_iface *iface); +void mg_lwip_if_add_conn(struct mg_connection *nc); +void mg_lwip_if_remove_conn(struct mg_connection *nc); +time_t mg_lwip_if_poll(struct mg_iface *iface, int timeout_ms); + +#if defined(RTOS_SDK) || defined(ESP_PLATFORM) +extern void mgos_lock(); +extern void mgos_unlock(); +#else +#define mgos_lock() +#define mgos_unlock() +#endif + +static void mg_lwip_recv_common(struct mg_connection *nc, struct pbuf *p); + +#if LWIP_TCP_KEEPALIVE +void mg_lwip_set_keepalive_params(struct mg_connection *nc, int idle, + int interval, int count) { + if (nc->sock == INVALID_SOCKET || nc->flags & MG_F_UDP) { + return; + } + struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock; + struct tcp_pcb *tpcb = cs->pcb.tcp; + if (idle > 0 && interval > 0 && count > 0) { + tpcb->keep_idle = idle * 1000; + tpcb->keep_intvl = interval * 1000; + tpcb->keep_cnt = count; + tpcb->so_options |= SOF_KEEPALIVE; + } else { + tpcb->so_options &= ~SOF_KEEPALIVE; + } +} +#elif !defined(MG_NO_LWIP_TCP_KEEPALIVE) +#warning LWIP TCP keepalive is disabled. Please consider enabling it. +#endif /* LWIP_TCP_KEEPALIVE */ + +static err_t mg_lwip_tcp_conn_cb(void *arg, struct tcp_pcb *tpcb, err_t err) { + struct mg_connection *nc = (struct mg_connection *) arg; + DBG(("%p connect to %s:%u = %d", nc, IPADDR_NTOA(ipX_2_ip(&tpcb->remote_ip)), + tpcb->remote_port, err)); + if (nc == NULL) { + tcp_abort(tpcb); + return ERR_ARG; + } + struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock; + cs->err = err; +#if LWIP_TCP_KEEPALIVE + if (err == 0) mg_lwip_set_keepalive_params(nc, 60, 10, 6); +#endif + mg_lwip_post_signal(MG_SIG_CONNECT_RESULT, nc); + return ERR_OK; +} + +static void mg_lwip_tcp_error_cb(void *arg, err_t err) { + struct mg_connection *nc = (struct mg_connection *) arg; + DBG(("%p conn error %d", nc, err)); + if (nc == NULL) return; + struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock; + cs->pcb.tcp = NULL; /* Has already been deallocated */ + if (nc->flags & MG_F_CONNECTING) { + cs->err = err; + mg_lwip_post_signal(MG_SIG_CONNECT_RESULT, nc); + } else { + mg_lwip_post_signal(MG_SIG_CLOSE_CONN, nc); + } +} + +static err_t mg_lwip_tcp_recv_cb(void *arg, struct tcp_pcb *tpcb, + struct pbuf *p, err_t err) { + struct mg_connection *nc = (struct mg_connection *) arg; + DBG(("%p %p %u %d", nc, tpcb, (p != NULL ? p->tot_len : 0), err)); + if (p == NULL) { + if (nc != NULL && !(nc->flags & MG_F_CLOSE_IMMEDIATELY)) { + struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock; + if (cs->rx_chain != NULL) { + /* + * rx_chain still contains non-consumed data, don't close the + * connection + */ + cs->draining_rx_chain = 1; + } else { + mg_lwip_post_signal(MG_SIG_CLOSE_CONN, nc); + } + } else { + /* Tombstoned connection, do nothing. */ + } + return ERR_OK; + } else if (nc == NULL) { + tcp_abort(tpcb); + return ERR_ARG; + } + struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock; + /* + * If we get a chain of more than one segment at once, we need to bump + * refcount on the subsequent bufs to make them independent. + */ + if (p->next != NULL) { + struct pbuf *q = p->next; + for (; q != NULL; q = q->next) pbuf_ref(q); + } + mgos_lock(); + if (cs->rx_chain == NULL) { + cs->rx_offset = 0; + } else if (pbuf_clen(cs->rx_chain) >= 4) { + /* ESP SDK has a limited pool of 5 pbufs. We must not hog them all or RX + * will be completely blocked. We already have at least 4 in the chain, + * this one is, so we have to make a copy and release this one. */ + struct pbuf *np = pbuf_alloc(PBUF_RAW, p->tot_len, PBUF_RAM); + if (np != NULL) { + pbuf_copy(np, p); + pbuf_free(p); + p = np; + } + } + mgos_unlock(); + mg_lwip_recv_common(nc, p); + return ERR_OK; +} + +static void mg_lwip_consume_rx_chain_tcp(struct mg_connection *nc) { + struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock; + mgos_lock(); + while (cs->rx_chain != NULL && nc->recv_mbuf.len < nc->recv_mbuf_limit) { + struct pbuf *seg = cs->rx_chain; + + size_t seg_len = (seg->len - cs->rx_offset); + size_t buf_avail = (nc->recv_mbuf_limit - nc->recv_mbuf.len); + size_t len = MIN(seg_len, buf_avail); + + char *data = (char *) MG_MALLOC(len); + if (data == NULL) { + mgos_unlock(); + DBG(("OOM")); + return; + } + pbuf_copy_partial(seg, data, len, cs->rx_offset); + cs->rx_offset += len; + if (cs->rx_offset == cs->rx_chain->len) { + cs->rx_chain = pbuf_dechain(cs->rx_chain); + pbuf_free(seg); + cs->rx_offset = 0; + } + mgos_unlock(); + mg_if_recv_tcp_cb(nc, data, len, 1 /* own */); + mgos_lock(); + } + mgos_unlock(); +} + +static void mg_lwip_handle_recv_tcp(struct mg_connection *nc) { +#if MG_ENABLE_SSL + if (nc->flags & MG_F_SSL) { + if (nc->flags & MG_F_SSL_HANDSHAKE_DONE) { + mg_lwip_ssl_recv(nc); + } else { + mg_lwip_ssl_do_hs(nc); + } + return; + } +#endif + + mg_lwip_consume_rx_chain_tcp(nc); + + if (nc->send_mbuf.len > 0) { + mg_lwip_mgr_schedule_poll(nc->mgr); + } +} + +static err_t mg_lwip_tcp_sent_cb(void *arg, struct tcp_pcb *tpcb, + u16_t num_sent) { + struct mg_connection *nc = (struct mg_connection *) arg; + DBG(("%p %p %u %p %p", nc, tpcb, num_sent, tpcb->unsent, tpcb->unacked)); + if (nc == NULL) return ERR_OK; + if ((nc->flags & MG_F_SEND_AND_CLOSE) && !(nc->flags & MG_F_WANT_WRITE) && + nc->send_mbuf.len == 0 && tpcb->unsent == NULL && tpcb->unacked == NULL) { + mg_lwip_post_signal(MG_SIG_CLOSE_CONN, nc); + } + return ERR_OK; +} + +struct mg_lwip_if_connect_tcp_ctx { + struct mg_connection *nc; + const union socket_address *sa; +}; + +static void mg_lwip_if_connect_tcp_tcpip(void *arg) { + struct mg_lwip_if_connect_tcp_ctx *ctx = + (struct mg_lwip_if_connect_tcp_ctx *) arg; + struct mg_connection *nc = ctx->nc; + const union socket_address *sa = ctx->sa; + + struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock; + struct tcp_pcb *tpcb = TCP_NEW(); + cs->pcb.tcp = tpcb; + ip_addr_t *ip = (ip_addr_t *) &sa->sin.sin_addr.s_addr; + u16_t port = ntohs(sa->sin.sin_port); + tcp_arg(tpcb, nc); + tcp_err(tpcb, mg_lwip_tcp_error_cb); + tcp_sent(tpcb, mg_lwip_tcp_sent_cb); + tcp_recv(tpcb, mg_lwip_tcp_recv_cb); + cs->err = TCP_BIND(tpcb, IP_ADDR_ANY, 0 /* any port */); + DBG(("%p tcp_bind = %d", nc, cs->err)); + if (cs->err != ERR_OK) { + mg_lwip_post_signal(MG_SIG_CONNECT_RESULT, nc); + return; + } + cs->err = tcp_connect(tpcb, ip, port, mg_lwip_tcp_conn_cb); + DBG(("%p tcp_connect %p = %d", nc, tpcb, cs->err)); + if (cs->err != ERR_OK) { + mg_lwip_post_signal(MG_SIG_CONNECT_RESULT, nc); + return; + } +} + +void mg_lwip_if_connect_tcp(struct mg_connection *nc, + const union socket_address *sa) { + struct mg_lwip_if_connect_tcp_ctx ctx = {.nc = nc, .sa = sa}; + tcpip_callback(mg_lwip_if_connect_tcp_tcpip, &ctx); +} + +/* + * Lwip included in the SDKs for nRF5x chips has different type for the + * callback of `udp_recv()` + */ +#if ((LWIP_VERSION_MAJOR << 8) | LWIP_VERSION_MINOR) >= 0x0105 +static void mg_lwip_udp_recv_cb(void *arg, struct udp_pcb *pcb, struct pbuf *p, + const ip_addr_t *addr, u16_t port) +#else +static void mg_lwip_udp_recv_cb(void *arg, struct udp_pcb *pcb, struct pbuf *p, + ip_addr_t *addr, u16_t port) +#endif +{ + struct mg_connection *nc = (struct mg_connection *) arg; + DBG(("%p %s:%u %p %u %u", nc, IPADDR_NTOA(addr), port, p, p->ref, p->len)); + /* Put address in a separate pbuf and tack it onto the packet. */ + struct pbuf *sap = + pbuf_alloc(PBUF_RAW, sizeof(union socket_address), PBUF_RAM); + if (sap == NULL) { + pbuf_free(p); + return; + } + union socket_address *sa = (union socket_address *) sap->payload; +#if ((LWIP_VERSION_MAJOR << 8) | LWIP_VERSION_MINOR) >= 0x0105 + sa->sin.sin_addr.s_addr = ip_2_ip4(addr)->addr; +#else + sa->sin.sin_addr.s_addr = addr->addr; +#endif + sa->sin.sin_port = htons(port); + /* Logic in the recv handler requires that there be exactly one data pbuf. */ + p = pbuf_coalesce(p, PBUF_RAW); + pbuf_chain(sap, p); + mg_lwip_recv_common(nc, sap); + (void) pcb; +} + +static void mg_lwip_recv_common(struct mg_connection *nc, struct pbuf *p) { + struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock; + mgos_lock(); + if (cs->rx_chain == NULL) { + cs->rx_chain = p; + } else { + pbuf_chain(cs->rx_chain, p); + } + if (!cs->recv_pending) { + cs->recv_pending = 1; + mg_lwip_post_signal(MG_SIG_RECV, nc); + } + mgos_unlock(); +} + +static void mg_lwip_handle_recv_udp(struct mg_connection *nc) { + struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock; + /* + * For UDP, RX chain consists of interleaved address and packet bufs: + * Address pbuf followed by exactly one data pbuf (recv_cb took care of that). + */ + while (cs->rx_chain != NULL) { + struct pbuf *sap = cs->rx_chain; + struct pbuf *p = sap->next; + cs->rx_chain = pbuf_dechain(p); + size_t data_len = p->len; + char *data = (char *) MG_MALLOC(data_len); + if (data != NULL) { + pbuf_copy_partial(p, data, data_len, 0); + pbuf_free(p); + mg_if_recv_udp_cb(nc, data, data_len, + (union socket_address *) sap->payload, sap->len); + pbuf_free(sap); + } else { + pbuf_free(p); + pbuf_free(sap); + } + } +} + +static void mg_lwip_if_connect_udp_tcpip(void *arg) { + struct mg_connection *nc = (struct mg_connection *) arg; + struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock; + struct udp_pcb *upcb = udp_new(); + cs->err = UDP_BIND(upcb, IP_ADDR_ANY, 0 /* any port */); + DBG(("%p udp_bind %p = %d", nc, upcb, cs->err)); + if (cs->err == ERR_OK) { + udp_recv(upcb, mg_lwip_udp_recv_cb, nc); + cs->pcb.udp = upcb; + } else { + udp_remove(upcb); + } + mg_lwip_post_signal(MG_SIG_CONNECT_RESULT, nc); +} + +void mg_lwip_if_connect_udp(struct mg_connection *nc) { + tcpip_callback(mg_lwip_if_connect_udp_tcpip, nc); +} + +void mg_lwip_accept_conn(struct mg_connection *nc, struct tcp_pcb *tpcb) { + union socket_address sa; + SET_ADDR(&sa, &tpcb->remote_ip); + sa.sin.sin_port = htons(tpcb->remote_port); + mg_if_accept_tcp_cb(nc, &sa, sizeof(sa.sin)); +} + +static void tcp_close_tcpip(void *arg) { + tcp_close((struct tcp_pcb *) arg); +} + +void mg_lwip_handle_accept(struct mg_connection *nc) { + struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock; + if (cs->pcb.tcp == NULL) return; +#if MG_ENABLE_SSL + if (cs->lc->flags & MG_F_SSL) { + if (mg_ssl_if_conn_accept(nc, cs->lc) != MG_SSL_OK) { + LOG(LL_ERROR, ("SSL error")); + tcpip_callback(tcp_close_tcpip, cs->pcb.tcp); + } + } else +#endif + { + mg_lwip_accept_conn(nc, cs->pcb.tcp); + } +} + +static err_t mg_lwip_accept_cb(void *arg, struct tcp_pcb *newtpcb, err_t err) { + struct mg_connection *lc = (struct mg_connection *) arg, *nc; + struct mg_lwip_conn_state *lcs, *cs; + struct tcp_pcb_listen *lpcb; + LOG(LL_DEBUG, + ("%p conn %p from %s:%u", lc, newtpcb, + IPADDR_NTOA(ipX_2_ip(&newtpcb->remote_ip)), newtpcb->remote_port)); + if (lc == NULL) { + tcp_abort(newtpcb); + return ERR_ABRT; + } + lcs = (struct mg_lwip_conn_state *) lc->sock; + lpcb = (struct tcp_pcb_listen *) lcs->pcb.tcp; +#if TCP_LISTEN_BACKLOG + tcp_accepted(lpcb); +#endif + nc = mg_if_accept_new_conn(lc); + if (nc == NULL) { + tcp_abort(newtpcb); + return ERR_ABRT; + } + cs = (struct mg_lwip_conn_state *) nc->sock; + cs->lc = lc; + cs->pcb.tcp = newtpcb; + /* We need to set up callbacks before returning because data may start + * arriving immediately. */ + tcp_arg(newtpcb, nc); + tcp_err(newtpcb, mg_lwip_tcp_error_cb); + tcp_sent(newtpcb, mg_lwip_tcp_sent_cb); + tcp_recv(newtpcb, mg_lwip_tcp_recv_cb); +#if LWIP_TCP_KEEPALIVE + mg_lwip_set_keepalive_params(nc, 60, 10, 6); +#endif + mg_lwip_post_signal(MG_SIG_ACCEPT, nc); + (void) err; + (void) lpcb; + return ERR_OK; +} + +struct mg_lwip_if_listen_ctx { + struct mg_connection *nc; + union socket_address *sa; + int ret; +}; + +static void mg_lwip_if_listen_tcp_tcpip(void *arg) { + struct mg_lwip_if_listen_ctx *ctx = (struct mg_lwip_if_listen_ctx *) arg; + struct mg_connection *nc = ctx->nc; + union socket_address *sa = ctx->sa; + struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock; + struct tcp_pcb *tpcb = TCP_NEW(); + ip_addr_t *ip = (ip_addr_t *) &sa->sin.sin_addr.s_addr; + u16_t port = ntohs(sa->sin.sin_port); + cs->err = TCP_BIND(tpcb, ip, port); + DBG(("%p tcp_bind(%s:%u) = %d", nc, IPADDR_NTOA(ip), port, cs->err)); + if (cs->err != ERR_OK) { + tcp_close(tpcb); + ctx->ret = -1; + return; + } + tcp_arg(tpcb, nc); + tpcb = tcp_listen(tpcb); + cs->pcb.tcp = tpcb; + tcp_accept(tpcb, mg_lwip_accept_cb); + ctx->ret = 0; +} + +int mg_lwip_if_listen_tcp(struct mg_connection *nc, union socket_address *sa) { + struct mg_lwip_if_listen_ctx ctx = {.nc = nc, .sa = sa}; + tcpip_callback(mg_lwip_if_listen_tcp_tcpip, &ctx); + return ctx.ret; +} + +static void mg_lwip_if_listen_udp_tcpip(void *arg) { + struct mg_lwip_if_listen_ctx *ctx = (struct mg_lwip_if_listen_ctx *) arg; + struct mg_connection *nc = ctx->nc; + union socket_address *sa = ctx->sa; + struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock; + struct udp_pcb *upcb = udp_new(); + ip_addr_t *ip = (ip_addr_t *) &sa->sin.sin_addr.s_addr; + u16_t port = ntohs(sa->sin.sin_port); + cs->err = UDP_BIND(upcb, ip, port); + DBG(("%p udb_bind(%s:%u) = %d", nc, IPADDR_NTOA(ip), port, cs->err)); + if (cs->err != ERR_OK) { + udp_remove(upcb); + ctx->ret = -1; + } else { + udp_recv(upcb, mg_lwip_udp_recv_cb, nc); + cs->pcb.udp = upcb; + ctx->ret = 0; + } +} + +int mg_lwip_if_listen_udp(struct mg_connection *nc, union socket_address *sa) { + struct mg_lwip_if_listen_ctx ctx = {.nc = nc, .sa = sa}; + tcpip_callback(mg_lwip_if_listen_udp_tcpip, &ctx); + return ctx.ret; +} + +struct mg_lwip_tcp_write_ctx { + struct mg_connection *nc; + const void *data; + uint16_t len; + int ret; +}; + +static void tcp_output_tcpip(void *arg) { + tcp_output((struct tcp_pcb *) arg); +} + +static void mg_lwip_tcp_write_tcpip(void *arg) { + struct mg_lwip_tcp_write_ctx *ctx = (struct mg_lwip_tcp_write_ctx *) arg; + struct mg_connection *nc = ctx->nc; + struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock; + struct tcp_pcb *tpcb = cs->pcb.tcp; + size_t len = MIN(tpcb->mss, MIN(ctx->len, tpcb->snd_buf)); + size_t unsent, unacked; + if (len == 0) { + DBG(("%p no buf avail %u %u %p %p", tpcb, tpcb->snd_buf, tpcb->snd_queuelen, + tpcb->unsent, tpcb->unacked)); + tcpip_callback(tcp_output_tcpip, tpcb); + ctx->ret = 0; + return; + } + unsent = (tpcb->unsent != NULL ? tpcb->unsent->len : 0); + unacked = (tpcb->unacked != NULL ? tpcb->unacked->len : 0); +/* + * On ESP8266 we only allow one TCP segment in flight at any given time. + * This may increase latency and reduce efficiency of tcp windowing, + * but memory is scarce and precious on that platform so we do this to + * reduce footprint. + */ +#if CS_PLATFORM == CS_P_ESP8266 + if (unacked > 0) { + ctx->ret = 0; + return; + } + len = MIN(len, (TCP_MSS - unsent)); +#endif + cs->err = tcp_write(tpcb, ctx->data, len, TCP_WRITE_FLAG_COPY); + unsent = (tpcb->unsent != NULL ? tpcb->unsent->len : 0); + unacked = (tpcb->unacked != NULL ? tpcb->unacked->len : 0); + DBG(("%p tcp_write %u = %d, %u %u", tpcb, len, cs->err, unsent, unacked)); + if (cs->err != ERR_OK) { + /* + * We ignore ERR_MEM because memory will be freed up when the data is sent + * and we'll retry. + */ + ctx->ret = (cs->err == ERR_MEM ? 0 : -1); + return; + } + ctx->ret = len; +} + +static int mg_lwip_tcp_write(struct mg_connection *nc, const void *data, + uint16_t len) { + struct mg_lwip_tcp_write_ctx ctx = {.nc = nc, .data = data, .len = len}; + struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock; + struct tcp_pcb *tpcb = cs->pcb.tcp; + if (tpcb == NULL) { + return -1; + } + tcpip_callback(mg_lwip_tcp_write_tcpip, &ctx); + return ctx.ret; +} + +struct udp_sendto_ctx { + struct udp_pcb *upcb; + struct pbuf *p; + ip_addr_t *ip; + uint16_t port; + int ret; +}; + +static void udp_sendto_tcpip(void *arg) { + struct udp_sendto_ctx *ctx = (struct udp_sendto_ctx *) arg; + ctx->ret = udp_sendto(ctx->upcb, ctx->p, ctx->ip, ctx->port); +} + +static int mg_lwip_udp_send(struct mg_connection *nc, const void *data, + uint16_t len) { + struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock; + if (cs->pcb.udp == NULL) { + /* + * In case of UDP, this usually means, what + * async DNS resolve is still in progress and connection + * is not ready yet + */ + DBG(("%p socket is not connected", nc)); + return -1; + } + struct udp_pcb *upcb = cs->pcb.udp; + struct pbuf *p = pbuf_alloc(PBUF_TRANSPORT, len, PBUF_RAM); +#if defined(LWIP_IPV4) && LWIP_IPV4 && defined(LWIP_IPV6) && LWIP_IPV6 + ip_addr_t ip = {.u_addr.ip4.addr = nc->sa.sin.sin_addr.s_addr, .type = 0}; +#else + ip_addr_t ip = {.addr = nc->sa.sin.sin_addr.s_addr}; +#endif + u16_t port = ntohs(nc->sa.sin.sin_port); + if (p == NULL) { + DBG(("OOM")); + return 0; + } + memcpy(p->payload, data, len); + struct udp_sendto_ctx ctx = {.upcb = upcb, .p = p, .ip = &ip, .port = port}; + tcpip_callback(udp_sendto_tcpip, &ctx); + cs->err = ctx.ret; + pbuf_free(p); + return (cs->err == ERR_OK ? len : -1); +} + +static void mg_lwip_send_more(struct mg_connection *nc) { + int num_sent = 0; + if (nc->sock == INVALID_SOCKET) return; + if (nc->flags & MG_F_UDP) { + num_sent = mg_lwip_udp_send(nc, nc->send_mbuf.buf, nc->send_mbuf.len); + DBG(("%p mg_lwip_udp_send %u = %d", nc, nc->send_mbuf.len, num_sent)); + } else { + num_sent = mg_lwip_tcp_write(nc, nc->send_mbuf.buf, nc->send_mbuf.len); + DBG(("%p mg_lwip_tcp_write %u = %d", nc, nc->send_mbuf.len, num_sent)); + } + if (num_sent == 0) return; + if (num_sent > 0) { + mg_if_sent_cb(nc, num_sent); + } else { + mg_lwip_post_signal(MG_SIG_CLOSE_CONN, nc); + } +} + +void mg_lwip_if_tcp_send(struct mg_connection *nc, const void *buf, + size_t len) { + mbuf_append(&nc->send_mbuf, buf, len); + mg_lwip_mgr_schedule_poll(nc->mgr); +} + +void mg_lwip_if_udp_send(struct mg_connection *nc, const void *buf, + size_t len) { + mbuf_append(&nc->send_mbuf, buf, len); + mg_lwip_mgr_schedule_poll(nc->mgr); +} + +struct tcp_recved_ctx { + struct tcp_pcb *tpcb; + size_t len; +}; + +void tcp_recved_tcpip(void *arg) { + struct tcp_recved_ctx *ctx = (struct tcp_recved_ctx *) arg; + tcp_recved(ctx->tpcb, ctx->len); +} + +void mg_lwip_if_recved(struct mg_connection *nc, size_t len) { + if (nc->flags & MG_F_UDP) return; + struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock; + if (nc->sock == INVALID_SOCKET || cs->pcb.tcp == NULL) { + DBG(("%p invalid socket", nc)); + return; + } + DBG(("%p %p %u %u", nc, cs->pcb.tcp, len, + (cs->rx_chain ? cs->rx_chain->tot_len : 0))); + struct tcp_recved_ctx ctx = {.tpcb = cs->pcb.tcp, .len = len}; +#if MG_ENABLE_SSL + if (!(nc->flags & MG_F_SSL)) { + tcpip_callback(tcp_recved_tcpip, &ctx); + } else { + /* Currently SSL acknowledges data immediately. + * TODO(rojer): Find a way to propagate mg_lwip_if_recved. */ + } +#else + tcpip_callback(tcp_recved_tcpip, &ctx); +#endif + mbuf_trim(&nc->recv_mbuf); +} + +int mg_lwip_if_create_conn(struct mg_connection *nc) { + struct mg_lwip_conn_state *cs = + (struct mg_lwip_conn_state *) MG_CALLOC(1, sizeof(*cs)); + if (cs == NULL) return 0; + cs->nc = nc; + nc->sock = (intptr_t) cs; + return 1; +} + +static void udp_remove_tcpip(void *arg) { + udp_remove((struct udp_pcb *) arg); +} + +void mg_lwip_if_destroy_conn(struct mg_connection *nc) { + if (nc->sock == INVALID_SOCKET) return; + struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock; + if (!(nc->flags & MG_F_UDP)) { + struct tcp_pcb *tpcb = cs->pcb.tcp; + if (tpcb != NULL) { + tcp_arg(tpcb, NULL); + DBG(("%p tcp_close %p", nc, tpcb)); + tcp_arg(tpcb, NULL); + tcpip_callback(tcp_close_tcpip, tpcb); + } + while (cs->rx_chain != NULL) { + struct pbuf *seg = cs->rx_chain; + cs->rx_chain = pbuf_dechain(cs->rx_chain); + pbuf_free(seg); + } + memset(cs, 0, sizeof(*cs)); + MG_FREE(cs); + } else if (nc->listener == NULL) { + /* Only close outgoing UDP pcb or listeners. */ + struct udp_pcb *upcb = cs->pcb.udp; + if (upcb != NULL) { + DBG(("%p udp_remove %p", nc, upcb)); + tcpip_callback(udp_remove_tcpip, upcb); + } + memset(cs, 0, sizeof(*cs)); + MG_FREE(cs); + } + nc->sock = INVALID_SOCKET; +} + +void mg_lwip_if_get_conn_addr(struct mg_connection *nc, int remote, + union socket_address *sa) { + memset(sa, 0, sizeof(*sa)); + if (nc == NULL || nc->sock == INVALID_SOCKET) return; + struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock; + if (nc->flags & MG_F_UDP) { + struct udp_pcb *upcb = cs->pcb.udp; + if (remote) { + memcpy(sa, &nc->sa, sizeof(*sa)); + } else if (upcb != NULL) { + sa->sin.sin_port = htons(upcb->local_port); + SET_ADDR(sa, &upcb->local_ip); + } + } else { + struct tcp_pcb *tpcb = cs->pcb.tcp; + if (remote) { + memcpy(sa, &nc->sa, sizeof(*sa)); + } else if (tpcb != NULL) { + sa->sin.sin_port = htons(tpcb->local_port); + SET_ADDR(sa, &tpcb->local_ip); + } + } +} + +void mg_lwip_if_sock_set(struct mg_connection *nc, sock_t sock) { + nc->sock = sock; +} + +/* clang-format off */ +#define MG_LWIP_IFACE_VTABLE \ + { \ + mg_lwip_if_init, \ + mg_lwip_if_free, \ + mg_lwip_if_add_conn, \ + mg_lwip_if_remove_conn, \ + mg_lwip_if_poll, \ + mg_lwip_if_listen_tcp, \ + mg_lwip_if_listen_udp, \ + mg_lwip_if_connect_tcp, \ + mg_lwip_if_connect_udp, \ + mg_lwip_if_tcp_send, \ + mg_lwip_if_udp_send, \ + mg_lwip_if_recved, \ + mg_lwip_if_create_conn, \ + mg_lwip_if_destroy_conn, \ + mg_lwip_if_sock_set, \ + mg_lwip_if_get_conn_addr, \ + } +/* clang-format on */ + +const struct mg_iface_vtable mg_lwip_iface_vtable = MG_LWIP_IFACE_VTABLE; +#if MG_NET_IF == MG_NET_IF_LWIP_LOW_LEVEL +const struct mg_iface_vtable mg_default_iface_vtable = MG_LWIP_IFACE_VTABLE; +#endif + +#endif /* MG_ENABLE_NET_IF_LWIP_LOW_LEVEL */ +#ifdef MG_MODULE_LINES +#line 1 "common/platforms/lwip/mg_lwip_ev_mgr.c" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +#if MG_NET_IF == MG_NET_IF_LWIP_LOW_LEVEL + +#ifndef MG_SIG_QUEUE_LEN +#define MG_SIG_QUEUE_LEN 32 +#endif + +struct mg_ev_mgr_lwip_signal { + int sig; + struct mg_connection *nc; +}; + +struct mg_ev_mgr_lwip_data { + struct mg_ev_mgr_lwip_signal sig_queue[MG_SIG_QUEUE_LEN]; + int sig_queue_len; + int start_index; +}; + +void mg_lwip_post_signal(enum mg_sig_type sig, struct mg_connection *nc) { + struct mg_ev_mgr_lwip_data *md = + (struct mg_ev_mgr_lwip_data *) nc->iface->data; + mgos_lock(); + if (md->sig_queue_len >= MG_SIG_QUEUE_LEN) { + mgos_unlock(); + return; + } + int end_index = (md->start_index + md->sig_queue_len) % MG_SIG_QUEUE_LEN; + md->sig_queue[end_index].sig = sig; + md->sig_queue[end_index].nc = nc; + md->sig_queue_len++; + mg_lwip_mgr_schedule_poll(nc->mgr); + mgos_unlock(); +} + +void mg_ev_mgr_lwip_process_signals(struct mg_mgr *mgr) { + struct mg_ev_mgr_lwip_data *md = + (struct mg_ev_mgr_lwip_data *) mgr->ifaces[MG_MAIN_IFACE]->data; + while (md->sig_queue_len > 0) { + mgos_lock(); + int sig = md->sig_queue[md->start_index].sig; + struct mg_connection *nc = md->sig_queue[md->start_index].nc; + struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock; + md->start_index = (md->start_index + 1) % MG_SIG_QUEUE_LEN; + md->sig_queue_len--; + mgos_unlock(); + if (nc->iface == NULL || nc->mgr == NULL) continue; + switch (sig) { + case MG_SIG_CONNECT_RESULT: { +#if MG_ENABLE_SSL + if (cs->err == 0 && (nc->flags & MG_F_SSL) && + !(nc->flags & MG_F_SSL_HANDSHAKE_DONE)) { + mg_lwip_ssl_do_hs(nc); + } else +#endif + { + mg_if_connect_cb(nc, cs->err); + } + break; + } + case MG_SIG_CLOSE_CONN: { + nc->flags |= MG_F_SEND_AND_CLOSE; + mg_close_conn(nc); + break; + } + case MG_SIG_RECV: { + cs->recv_pending = 0; + if (nc->flags & MG_F_UDP) { + mg_lwip_handle_recv_udp(nc); + } else { + mg_lwip_handle_recv_tcp(nc); + } + break; + } + case MG_SIG_TOMBSTONE: { + break; + } + case MG_SIG_ACCEPT: { + mg_lwip_handle_accept(nc); + break; + } + } + } +} + +void mg_lwip_if_init(struct mg_iface *iface) { + LOG(LL_INFO, ("%p Mongoose init", iface)); + iface->data = MG_CALLOC(1, sizeof(struct mg_ev_mgr_lwip_data)); +} + +void mg_lwip_if_free(struct mg_iface *iface) { + MG_FREE(iface->data); + iface->data = NULL; +} + +void mg_lwip_if_add_conn(struct mg_connection *nc) { + (void) nc; +} + +void mg_lwip_if_remove_conn(struct mg_connection *nc) { + struct mg_ev_mgr_lwip_data *md = + (struct mg_ev_mgr_lwip_data *) nc->iface->data; + /* Walk the queue and null-out further signals for this conn. */ + for (int i = 0; i < MG_SIG_QUEUE_LEN; i++) { + if (md->sig_queue[i].nc == nc) { + md->sig_queue[i].sig = MG_SIG_TOMBSTONE; + } + } +} + +time_t mg_lwip_if_poll(struct mg_iface *iface, int timeout_ms) { + struct mg_mgr *mgr = iface->mgr; + int n = 0; + double now = mg_time(); + struct mg_connection *nc, *tmp; + double min_timer = 0; + int num_timers = 0; +#if 0 + DBG(("begin poll @%u", (unsigned int) (now * 1000))); +#endif + mg_ev_mgr_lwip_process_signals(mgr); + for (nc = mgr->active_connections; nc != NULL; nc = tmp) { + struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock; + tmp = nc->next; + n++; + if ((nc->flags & MG_F_CLOSE_IMMEDIATELY) || + ((nc->flags & MG_F_SEND_AND_CLOSE) && (nc->flags & MG_F_UDP) && + (nc->send_mbuf.len == 0))) { + mg_close_conn(nc); + continue; + } + mg_if_poll(nc, now); + mg_if_timer(nc, now); +#if MG_ENABLE_SSL + if ((nc->flags & MG_F_SSL) && cs != NULL && cs->pcb.tcp != NULL && + cs->pcb.tcp->state == ESTABLISHED) { + if (((nc->flags & MG_F_WANT_WRITE) || + ((nc->send_mbuf.len > 0) && + (nc->flags & MG_F_SSL_HANDSHAKE_DONE))) && + cs->pcb.tcp->snd_buf > 0) { + /* Can write more. */ + if (nc->flags & MG_F_SSL_HANDSHAKE_DONE) { + if (!(nc->flags & MG_F_CONNECTING)) mg_lwip_ssl_send(nc); + } else { + mg_lwip_ssl_do_hs(nc); + } + } + if (cs->rx_chain != NULL || (nc->flags & MG_F_WANT_READ)) { + if (nc->flags & MG_F_SSL_HANDSHAKE_DONE) { + if (!(nc->flags & MG_F_CONNECTING)) mg_lwip_ssl_recv(nc); + } else { + mg_lwip_ssl_do_hs(nc); + } + } + } else +#endif /* MG_ENABLE_SSL */ + { + if (nc->send_mbuf.len > 0 && !(nc->flags & MG_F_CONNECTING)) { + mg_lwip_send_more(nc); + } + } + if (nc->sock != INVALID_SOCKET && + !(nc->flags & (MG_F_UDP | MG_F_LISTENING)) && cs->pcb.tcp != NULL && + cs->pcb.tcp->unsent != NULL) { + tcpip_callback(tcp_output_tcpip, cs->pcb.tcp); + } + if (nc->ev_timer_time > 0) { + if (num_timers == 0 || nc->ev_timer_time < min_timer) { + min_timer = nc->ev_timer_time; + } + num_timers++; + } + + if (nc->sock != INVALID_SOCKET) { + /* Try to consume data from cs->rx_chain */ + mg_lwip_consume_rx_chain_tcp(nc); + + /* + * If the connection is about to close, and rx_chain is finally empty, + * send the MG_SIG_CLOSE_CONN signal + */ + if (cs->draining_rx_chain && cs->rx_chain == NULL) { + mg_lwip_post_signal(MG_SIG_CLOSE_CONN, nc); + } + } + } +#if 0 + DBG(("end poll @%u, %d conns, %d timers (min %u), next in %d ms", + (unsigned int) (now * 1000), n, num_timers, + (unsigned int) (min_timer * 1000), timeout_ms)); +#endif + (void) timeout_ms; + return now; +} + +uint32_t mg_lwip_get_poll_delay_ms(struct mg_mgr *mgr) { + struct mg_connection *nc; + double now; + double min_timer = 0; + int num_timers = 0; + mg_ev_mgr_lwip_process_signals(mgr); + for (nc = mg_next(mgr, NULL); nc != NULL; nc = mg_next(mgr, nc)) { + struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock; + if (nc->ev_timer_time > 0) { + if (num_timers == 0 || nc->ev_timer_time < min_timer) { + min_timer = nc->ev_timer_time; + } + num_timers++; + } + if (nc->send_mbuf.len > 0 +#if MG_ENABLE_SSL + || (nc->flags & MG_F_WANT_WRITE) +#endif + ) { + int can_send = 0; + /* We have stuff to send, but can we? */ + if (nc->flags & MG_F_UDP) { + /* UDP is always ready for sending. */ + can_send = (cs->pcb.udp != NULL); + } else { + can_send = (cs->pcb.tcp != NULL && cs->pcb.tcp->snd_buf > 0); + } + /* We want and can send, request a poll immediately. */ + if (can_send) return 0; + } + } + uint32_t timeout_ms = ~0; + now = mg_time(); + if (num_timers > 0) { + /* If we have a timer that is past due, do a poll ASAP. */ + if (min_timer < now) return 0; + double timer_timeout_ms = (min_timer - now) * 1000 + 1 /* rounding */; + if (timer_timeout_ms < timeout_ms) { + timeout_ms = timer_timeout_ms; + } + } + return timeout_ms; +} + +#endif /* MG_NET_IF == MG_NET_IF_LWIP_LOW_LEVEL */ +#ifdef MG_MODULE_LINES +#line 1 "common/platforms/lwip/mg_lwip_ssl_if.c" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +#if MG_ENABLE_SSL && MG_NET_IF == MG_NET_IF_LWIP_LOW_LEVEL + +/* Amalgamated: #include "common/mg_mem.h" */ +/* Amalgamated: #include "common/cs_dbg.h" */ + +#include <lwip/pbuf.h> +#include <lwip/tcp.h> + +#ifndef MG_LWIP_SSL_IO_SIZE +#define MG_LWIP_SSL_IO_SIZE 1024 +#endif + +#ifndef MIN +#define MIN(a, b) ((a) < (b) ? (a) : (b)) +#endif + +void mg_lwip_ssl_do_hs(struct mg_connection *nc) { + struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock; + int server_side = (nc->listener != NULL); + enum mg_ssl_if_result res; + if (nc->flags & MG_F_CLOSE_IMMEDIATELY) return; + res = mg_ssl_if_handshake(nc); + DBG(("%p %lu %d %d", nc, nc->flags, server_side, res)); + if (res != MG_SSL_OK) { + if (res == MG_SSL_WANT_WRITE) { + nc->flags |= MG_F_WANT_WRITE; + cs->err = 0; + } else if (res == MG_SSL_WANT_READ) { + /* + * Nothing to do in particular, we are callback-driven. + * What we definitely do not need anymore is SSL reading (nothing left). + */ + nc->flags &= ~MG_F_WANT_READ; + cs->err = 0; + } else { + cs->err = res; + if (server_side) { + mg_lwip_post_signal(MG_SIG_CLOSE_CONN, nc); + } else { + mg_lwip_post_signal(MG_SIG_CONNECT_RESULT, nc); + } + } + } else { + cs->err = 0; + nc->flags &= ~MG_F_WANT_WRITE; + /* + * Handshake is done. Schedule a read immediately to consume app data + * which may already be waiting. + */ + nc->flags |= (MG_F_SSL_HANDSHAKE_DONE | MG_F_WANT_READ); + if (server_side) { + mg_lwip_accept_conn(nc, cs->pcb.tcp); + } else { + mg_lwip_post_signal(MG_SIG_CONNECT_RESULT, nc); + } + } +} + +void mg_lwip_ssl_send(struct mg_connection *nc) { + if (nc->sock == INVALID_SOCKET) { + DBG(("%p invalid socket", nc)); + return; + } + struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock; + /* It's ok if the buffer is empty. Return value of 0 may also be valid. */ + int len = cs->last_ssl_write_size; + if (len == 0) { + len = MIN(MG_LWIP_SSL_IO_SIZE, nc->send_mbuf.len); + } + int ret = mg_ssl_if_write(nc, nc->send_mbuf.buf, len); + DBG(("%p SSL_write %u = %d", nc, len, ret)); + if (ret > 0) { + mg_if_sent_cb(nc, ret); + cs->last_ssl_write_size = 0; + } else if (ret < 0) { + /* This is tricky. We must remember the exact data we were sending to retry + * exactly the same send next time. */ + cs->last_ssl_write_size = len; + } + if (ret == len) { + nc->flags &= ~MG_F_WANT_WRITE; + } else if (ret == MG_SSL_WANT_WRITE) { + nc->flags |= MG_F_WANT_WRITE; + } else { + mg_lwip_post_signal(MG_SIG_CLOSE_CONN, nc); + } +} + +void mg_lwip_ssl_recv(struct mg_connection *nc) { + struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock; + /* Don't deliver data before connect callback */ + if (nc->flags & MG_F_CONNECTING) return; + while (nc->recv_mbuf.len < nc->recv_mbuf_limit) { + char *buf = (char *) MG_MALLOC(MG_LWIP_SSL_IO_SIZE); + if (buf == NULL) return; + int ret = mg_ssl_if_read(nc, buf, MG_LWIP_SSL_IO_SIZE); + DBG(("%p %p SSL_read %u = %d", nc, cs->rx_chain, MG_LWIP_SSL_IO_SIZE, ret)); + if (ret <= 0) { + MG_FREE(buf); + if (ret == MG_SSL_WANT_WRITE) { + nc->flags |= MG_F_WANT_WRITE; + return; + } else if (ret == MG_SSL_WANT_READ) { + /* + * Nothing to do in particular, we are callback-driven. + * What we definitely do not need anymore is SSL reading (nothing left). + */ + nc->flags &= ~MG_F_WANT_READ; + cs->err = 0; + return; + } else { + mg_lwip_post_signal(MG_SIG_CLOSE_CONN, nc); + return; + } + } else { + mg_if_recv_tcp_cb(nc, buf, ret, 1 /* own */); + } + } +} + +#ifdef KR_VERSION + +ssize_t kr_send(int fd, const void *buf, size_t len) { + struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) fd; + int ret = mg_lwip_tcp_write(cs->nc, buf, len); + DBG(("%p mg_lwip_tcp_write %u = %d", cs->nc, len, ret)); + if (ret == 0) ret = KR_IO_WOULDBLOCK; + return ret; +} + +ssize_t kr_recv(int fd, void *buf, size_t len) { + struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) fd; + struct pbuf *seg = cs->rx_chain; + if (seg == NULL) { + DBG(("%u - nothing to read", len)); + return KR_IO_WOULDBLOCK; + } + size_t seg_len = (seg->len - cs->rx_offset); + DBG(("%u %u %u %u", len, cs->rx_chain->len, seg_len, cs->rx_chain->tot_len)); + len = MIN(len, seg_len); + pbuf_copy_partial(seg, buf, len, cs->rx_offset); + cs->rx_offset += len; + tcp_recved(cs->pcb.tcp, len); + if (cs->rx_offset == cs->rx_chain->len) { + cs->rx_chain = pbuf_dechain(cs->rx_chain); + pbuf_free(seg); + cs->rx_offset = 0; + } + return len; +} + +#elif MG_SSL_IF == MG_SSL_IF_MBEDTLS + +int ssl_socket_send(void *ctx, const unsigned char *buf, size_t len) { + struct mg_connection *nc = (struct mg_connection *) ctx; + struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock; + int ret = mg_lwip_tcp_write(cs->nc, buf, len); + if (ret == 0) ret = MBEDTLS_ERR_SSL_WANT_WRITE; + LOG(LL_DEBUG, ("%p %d -> %d", nc, len, ret)); + return ret; +} + +int ssl_socket_recv(void *ctx, unsigned char *buf, size_t len) { + struct mg_connection *nc = (struct mg_connection *) ctx; + struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock; + struct pbuf *seg = cs->rx_chain; + if (seg == NULL) { + DBG(("%u - nothing to read", len)); + return MBEDTLS_ERR_SSL_WANT_READ; + } + size_t seg_len = (seg->len - cs->rx_offset); + DBG(("%u %u %u %u", len, cs->rx_chain->len, seg_len, cs->rx_chain->tot_len)); + mgos_lock(); + len = MIN(len, seg_len); + pbuf_copy_partial(seg, buf, len, cs->rx_offset); + cs->rx_offset += len; + /* TCP PCB may be NULL if connection has already been closed + * but we still have data to deliver to SSL. */ + if (cs->pcb.tcp != NULL) tcp_recved(cs->pcb.tcp, len); + if (cs->rx_offset == cs->rx_chain->len) { + cs->rx_chain = pbuf_dechain(cs->rx_chain); + pbuf_free(seg); + cs->rx_offset = 0; + } + mgos_unlock(); + LOG(LL_DEBUG, ("%p <- %d", nc, (int) len)); + return len; +} + +#endif + +#endif /* MG_ENABLE_SSL && MG_NET_IF == MG_NET_IF_LWIP_LOW_LEVEL */ +#ifdef MG_MODULE_LINES +#line 1 "common/platforms/wince/wince_libc.c" +#endif +/* + * Copyright (c) 2016 Cesanta Software Limited + * All rights reserved + */ + +#ifdef WINCE + +const char *strerror(int err) { + /* + * TODO(alashkin): there is no strerror on WinCE; + * look for similar wce_xxxx function + */ + static char buf[10]; + snprintf(buf, sizeof(buf), "%d", err); + return buf; +} + +int open(const char *filename, int oflag, int pmode) { + /* + * TODO(alashkin): mg_open function is not used in mongoose + * but exists in documentation as utility function + * Shall we delete it at all or implement for WinCE as well? + */ + DebugBreak(); + return 0; /* for compiler */ +} + +int _wstati64(const wchar_t *path, cs_stat_t *st) { + DWORD fa = GetFileAttributesW(path); + if (fa == INVALID_FILE_ATTRIBUTES) { + return -1; + } + memset(st, 0, sizeof(*st)); + if ((fa & FILE_ATTRIBUTE_DIRECTORY) == 0) { + HANDLE h; + FILETIME ftime; + st->st_mode |= _S_IFREG; + h = CreateFileW(path, GENERIC_READ, 0, NULL, OPEN_EXISTING, + FILE_ATTRIBUTE_NORMAL, NULL); + if (h == INVALID_HANDLE_VALUE) { + return -1; + } + st->st_size = GetFileSize(h, NULL); + GetFileTime(h, NULL, NULL, &ftime); + st->st_mtime = (uint32_t)((((uint64_t) ftime.dwLowDateTime + + ((uint64_t) ftime.dwHighDateTime << 32)) / + 10000000.0) - + 11644473600); + CloseHandle(h); + } else { + st->st_mode |= _S_IFDIR; + } + return 0; +} + +/* Windows CE doesn't have neither gmtime nor strftime */ +static void mg_gmt_time_string(char *buf, size_t buf_len, time_t *t) { + FILETIME ft; + SYSTEMTIME systime; + if (t != NULL) { + uint64_t filetime = (*t + 11644473600) * 10000000; + ft.dwLowDateTime = filetime & 0xFFFFFFFF; + ft.dwHighDateTime = (filetime & 0xFFFFFFFF00000000) >> 32; + FileTimeToSystemTime(&ft, &systime); + } else { + GetSystemTime(&systime); + } + /* There is no PRIu16 in WinCE SDK */ + snprintf(buf, buf_len, "%d.%d.%d %d:%d:%d GMT", (int) systime.wYear, + (int) systime.wMonth, (int) systime.wDay, (int) systime.wHour, + (int) systime.wMinute, (int) systime.wSecond); +} + +#endif +#ifdef MG_MODULE_LINES +#line 1 "common/platforms/pic32/pic32_net_if.h" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +#ifndef CS_COMMON_PLATFORMS_PIC32_NET_IF_H_ +#define CS_COMMON_PLATFORMS_PIC32_NET_IF_H_ + +/* Amalgamated: #include "mongoose/src/net_if.h" */ + +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +#ifndef MG_ENABLE_NET_IF_PIC32 +#define MG_ENABLE_NET_IF_PIC32 MG_NET_IF == MG_NET_IF_PIC32 +#endif + +extern const struct mg_iface_vtable mg_pic32_iface_vtable; + +#ifdef __cplusplus +} +#endif /* __cplusplus */ + +#endif /* CS_COMMON_PLATFORMS_PIC32_NET_IF_H_ */ +#ifdef MG_MODULE_LINES +#line 1 "common/platforms/pic32/pic32_net_if.c" +#endif +/* + * Copyright (c) 2014-2016 Cesanta Software Limited + * All rights reserved + */ + +#if MG_ENABLE_NET_IF_PIC32 + +int mg_pic32_if_create_conn(struct mg_connection *nc) { + (void) nc; + return 1; +} + +void mg_pic32_if_recved(struct mg_connection *nc, size_t len) { + (void) nc; + (void) len; +} + +void mg_pic32_if_add_conn(struct mg_connection *nc) { + (void) nc; +} + +void mg_pic32_if_init(struct mg_iface *iface) { + (void) iface; + (void) mg_get_errno(); /* Shutup compiler */ +} + +void mg_pic32_if_free(struct mg_iface *iface) { + (void) iface; +} + +void mg_pic32_if_remove_conn(struct mg_connection *nc) { + (void) nc; +} + +void mg_pic32_if_destroy_conn(struct mg_connection *nc) { + if (nc->sock == INVALID_SOCKET) return; + /* For UDP, only close outgoing sockets or listeners. */ + if (!(nc->flags & MG_F_UDP)) { + /* Close TCP */ + TCPIP_TCP_Close((TCP_SOCKET) nc->sock); + } else if (nc->listener == NULL) { + /* Only close outgoing UDP or listeners. */ + TCPIP_UDP_Close((UDP_SOCKET) nc->sock); + } + + nc->sock = INVALID_SOCKET; +} + +int mg_pic32_if_listen_udp(struct mg_connection *nc, union socket_address *sa) { + nc->sock = TCPIP_UDP_ServerOpen( + sa->sin.sin_family == AF_INET ? IP_ADDRESS_TYPE_IPV4 + : IP_ADDRESS_TYPE_IPV6, + ntohs(sa->sin.sin_port), + sa->sin.sin_addr.s_addr == 0 ? 0 : (IP_MULTI_ADDRESS *) &sa->sin); + if (nc->sock == INVALID_SOCKET) { + return -1; + } + return 0; +} + +void mg_pic32_if_udp_send(struct mg_connection *nc, const void *buf, + size_t len) { + mbuf_append(&nc->send_mbuf, buf, len); +} + +void mg_pic32_if_tcp_send(struct mg_connection *nc, const void *buf, + size_t len) { + mbuf_append(&nc->send_mbuf, buf, len); +} + +int mg_pic32_if_listen_tcp(struct mg_connection *nc, union socket_address *sa) { + nc->sock = TCPIP_TCP_ServerOpen( + sa->sin.sin_family == AF_INET ? IP_ADDRESS_TYPE_IPV4 + : IP_ADDRESS_TYPE_IPV6, + ntohs(sa->sin.sin_port), + sa->sin.sin_addr.s_addr == 0 ? 0 : (IP_MULTI_ADDRESS *) &sa->sin); + memcpy(&nc->sa, sa, sizeof(*sa)); + if (nc->sock == INVALID_SOCKET) { + return -1; + } + return 0; +} + +static int mg_accept_conn(struct mg_connection *lc) { + struct mg_connection *nc; + TCP_SOCKET_INFO si; + union socket_address sa; + + nc = mg_if_accept_new_conn(lc); + + if (nc == NULL) { + return 0; + } + + nc->sock = lc->sock; + nc->flags &= ~MG_F_LISTENING; + + if (!TCPIP_TCP_SocketInfoGet((TCP_SOCKET) nc->sock, &si)) { + return 0; + } + + if (si.addressType == IP_ADDRESS_TYPE_IPV4) { + sa.sin.sin_family = AF_INET; + sa.sin.sin_port = htons(si.remotePort); + sa.sin.sin_addr.s_addr = si.remoteIPaddress.v4Add.Val; + } else { + /* TODO(alashkin): do something with _potential_ IPv6 */ + memset(&sa, 0, sizeof(sa)); + } + + mg_if_accept_tcp_cb(nc, (union socket_address *) &sa, sizeof(sa)); + + return mg_pic32_if_listen_tcp(lc, &lc->sa) >= 0; +} + +char *inet_ntoa(struct in_addr in) { + static char addr[17]; + snprintf(addr, sizeof(addr), "%d.%d.%d.%d", (int) in.S_un.S_un_b.s_b1, + (int) in.S_un.S_un_b.s_b2, (int) in.S_un.S_un_b.s_b3, + (int) in.S_un.S_un_b.s_b4); + return addr; +} + +static void mg_handle_send(struct mg_connection *nc) { + uint16_t bytes_written = 0; + if (nc->flags & MG_F_UDP) { + if (!TCPIP_UDP_RemoteBind( + (UDP_SOCKET) nc->sock, + nc->sa.sin.sin_family == AF_INET ? IP_ADDRESS_TYPE_IPV4 + : IP_ADDRESS_TYPE_IPV6, + ntohs(nc->sa.sin.sin_port), (IP_MULTI_ADDRESS *) &nc->sa.sin)) { + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + return; + } + bytes_written = TCPIP_UDP_TxPutIsReady((UDP_SOCKET) nc->sock, 0); + if (bytes_written >= nc->send_mbuf.len) { + if (TCPIP_UDP_ArrayPut((UDP_SOCKET) nc->sock, + (uint8_t *) nc->send_mbuf.buf, + nc->send_mbuf.len) != nc->send_mbuf.len) { + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + bytes_written = 0; + } + } + } else { + bytes_written = TCPIP_TCP_FifoTxFreeGet((TCP_SOCKET) nc->sock); + if (bytes_written != 0) { + if (bytes_written > nc->send_mbuf.len) { + bytes_written = nc->send_mbuf.len; + } + if (TCPIP_TCP_ArrayPut((TCP_SOCKET) nc->sock, + (uint8_t *) nc->send_mbuf.buf, + bytes_written) != bytes_written) { + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + bytes_written = 0; + } + } + } + + mg_if_sent_cb(nc, bytes_written); +} + +static void mg_handle_recv(struct mg_connection *nc) { + uint16_t bytes_read = 0; + uint8_t *buf = NULL; + if (nc->flags & MG_F_UDP) { + bytes_read = TCPIP_UDP_GetIsReady((UDP_SOCKET) nc->sock); + if (bytes_read != 0 && + (nc->recv_mbuf_limit == -1 || + nc->recv_mbuf.len + bytes_read < nc->recv_mbuf_limit)) { + buf = (uint8_t *) MG_MALLOC(bytes_read); + if (TCPIP_UDP_ArrayGet((UDP_SOCKET) nc->sock, buf, bytes_read) != + bytes_read) { + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + bytes_read = 0; + MG_FREE(buf); + } + } + } else { + bytes_read = TCPIP_TCP_GetIsReady((TCP_SOCKET) nc->sock); + if (bytes_read != 0) { + if (nc->recv_mbuf_limit != -1 && + nc->recv_mbuf_limit - nc->recv_mbuf.len > bytes_read) { + bytes_read = nc->recv_mbuf_limit - nc->recv_mbuf.len; + } + buf = (uint8_t *) MG_MALLOC(bytes_read); + if (TCPIP_TCP_ArrayGet((TCP_SOCKET) nc->sock, buf, bytes_read) != + bytes_read) { + nc->flags |= MG_F_CLOSE_IMMEDIATELY; + MG_FREE(buf); + bytes_read = 0; + } + } + } + + if (bytes_read != 0) { + mg_if_recv_tcp_cb(nc, buf, bytes_read, 1 /* own */); + } +} + +time_t mg_pic32_if_poll(struct mg_iface *iface, int timeout_ms) { + struct mg_mgr *mgr = iface->mgr; + double now = mg_time(); + struct mg_connection *nc, *tmp; + + for (nc = mgr->active_connections; nc != NULL; nc = tmp) { + tmp = nc->next; + + if (nc->flags & MG_F_CONNECTING) { + /* processing connections */ + if (nc->flags & MG_F_UDP || + TCPIP_TCP_IsConnected((TCP_SOCKET) nc->sock)) { + mg_if_connect_cb(nc, 0); + } + } else if (nc->flags & MG_F_LISTENING) { + if (TCPIP_TCP_IsConnected((TCP_SOCKET) nc->sock)) { + /* accept new connections */ + mg_accept_conn(nc); + } + } else { + if (nc->send_mbuf.len != 0) { + mg_handle_send(nc); + } + + if (nc->recv_mbuf_limit == -1 || + nc->recv_mbuf.len < nc->recv_mbuf_limit) { + mg_handle_recv(nc); + } + } + } + + for (nc = mgr->active_connections; nc != NULL; nc = tmp) { + tmp = nc->next; + if ((nc->flags & MG_F_CLOSE_IMMEDIATELY) || + (nc->send_mbuf.len == 0 && (nc->flags & MG_F_SEND_AND_CLOSE))) { + mg_close_conn(nc); + } + } + + return now; +} + +void mg_pic32_if_sock_set(struct mg_connection *nc, sock_t sock) { + nc->sock = sock; +} + +void mg_pic32_if_get_conn_addr(struct mg_connection *nc, int remote, + union socket_address *sa) { + /* TODO(alaskin): not implemented yet */ +} + +void mg_pic32_if_connect_tcp(struct mg_connection *nc, + const union socket_address *sa) { + nc->sock = TCPIP_TCP_ClientOpen( + sa->sin.sin_family == AF_INET ? IP_ADDRESS_TYPE_IPV4 + : IP_ADDRESS_TYPE_IPV6, + ntohs(sa->sin.sin_port), (IP_MULTI_ADDRESS *) &sa->sin); + nc->err = (nc->sock == INVALID_SOCKET) ? -1 : 0; +} + +void mg_pic32_if_connect_udp(struct mg_connection *nc) { + nc->sock = TCPIP_UDP_ClientOpen(IP_ADDRESS_TYPE_ANY, 0, NULL); + nc->err = (nc->sock == INVALID_SOCKET) ? -1 : 0; +} + +/* clang-format off */ +#define MG_PIC32_IFACE_VTABLE \ + { \ + mg_pic32_if_init, \ + mg_pic32_if_free, \ + mg_pic32_if_add_conn, \ + mg_pic32_if_remove_conn, \ + mg_pic32_if_poll, \ + mg_pic32_if_listen_tcp, \ + mg_pic32_if_listen_udp, \ + mg_pic32_if_connect_tcp, \ + mg_pic32_if_connect_udp, \ + mg_pic32_if_tcp_send, \ + mg_pic32_if_udp_send, \ + mg_pic32_if_recved, \ + mg_pic32_if_create_conn, \ + mg_pic32_if_destroy_conn, \ + mg_pic32_if_sock_set, \ + mg_pic32_if_get_conn_addr, \ + } +/* clang-format on */ + +const struct mg_iface_vtable mg_pic32_iface_vtable = MG_PIC32_IFACE_VTABLE; +#if MG_NET_IF == MG_NET_IF_PIC32 +const struct mg_iface_vtable mg_default_iface_vtable = MG_PIC32_IFACE_VTABLE; +#endif + +#endif /* MG_ENABLE_NET_IF_PIC32 */ +#ifdef MG_MODULE_LINES +#line 1 "common/platforms/windows/windows_direct.c" +#endif +/* + * Copyright (c) 2017 Cesanta Software Limited + * All rights reserved + */ + +#ifdef _WIN32 + +int rmdir(const char *dirname) { + return _rmdir(dirname); +} + +unsigned int sleep(unsigned int seconds) { + Sleep(seconds * 1000); + return 0; +} + +#endif /* _WIN32 */ |