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#include "ftp_decoder_inner.h"
#include "ftp_decoder.h"
#include "ftp_decoder_util.h"
#include <stellar/session.h>
#include <sys/types.h>
#include <MESA/MESA_prof_load.h>
#include <MESA/MESA_handle_logger.h>
void *__ftp_decoder_logger_handle;
static void ftp_msg_free_cb(struct session *sess, void *msg, void *msg_free_arg)
{
free(msg);
}
static void *ftp_context_ctx_new_cb(struct session *sess, void *plugin_env)
{
struct ftp_decoder_env *fenv = (struct ftp_decoder_env *)plugin_env;
size_t payload_len;
const char *payload = session_get0_current_payload(sess, &payload_len);
int curdir = ftp_session_get_pkt_dir(sess);
int thread_idx = session_get_current_thread_id(sess);
int is_ctrl_link = ftp_ctrl_identify(sess, payload, payload_len, curdir);
if (is_ctrl_link)
{
struct ftp_context *fctx = (struct ftp_context *)calloc(1, sizeof(struct ftp_context));
fctx->link_type = FTP_LINK_CTRL;
ftp_decoder_stat_incrby(thread_idx, fenv, FTPD_STAT_CTRL_LINK_OPEN, 1);
ftp_runtime_log(RLOG_LV_DEBUG, "ftp ctrl link new: %s", session_get0_readable_addr(sess));
return fctx;
}
ftp_runtime_log(RLOG_LV_DEBUG, "ftp_data_identify: is not ctrl link: '%s' ", session_get0_readable_addr(sess));
struct ftp_context *data_ctx = ftp_data_identify(sess, fenv);
if (data_ctx)
{
data_ctx->link_type = FTP_LINK_DATA;
ftp_decoder_stat_incrby(thread_idx, fenv, FTPD_STAT_DATA_LINK_OPEN, 1);
ftp_runtime_log(RLOG_LV_DEBUG, "ftp data link new: '%s' ", session_get0_readable_addr(sess));
return data_ctx;
}
ftp_runtime_log(RLOG_LV_DEBUG, "ftp_data_identify: is not data link: '%s' ", session_get0_readable_addr(sess));
stellar_session_plugin_dettach_current_session(sess);
return NULL;
}
void ftp_context_ctx_free_cb(struct session *sess, void *session_ctx, void *plugin_env)
{
struct ftp_context *fctx = (struct ftp_context *)session_ctx;
if (NULL == fctx)
{
return;
}
int thread_idx = session_get_current_thread_id(sess);
if (fctx->link_type == FTP_LINK_CTRL)
{
ftp_decoder_stat_incrby(thread_idx, (struct ftp_decoder_env *)plugin_env, FTPD_STAT_CTRL_LINK_CLOSE, 1);
}
else
{
ftp_decoder_stat_incrby(thread_idx, (struct ftp_decoder_env *)plugin_env, FTPD_STAT_DATA_LINK_CLOSE, 1);
}
ftp_runtime_log(RLOG_LV_DEBUG, "ftp_context_ctx_free_cb: %s", session_get0_readable_addr(sess));
ftp_parse_result_free(&fctx->parse_result);
free(fctx);
}
static void ftpd_logger_init(struct ftp_decoder_env *fenv)
{
int log_level;
char log_path[256];
MESA_load_profile_int_def(FTP_DECODER_CFG_FILE, "FTP", "log_level", &log_level, 30);
MESA_load_profile_string_def(FTP_DECODER_CFG_FILE, "FTP", "log_path", log_path, sizeof(log_path), "./log/ftp_decoder.log");
MESA_handle_runtime_log_creation("./etc/sapp_log.conf");
fenv->logger_handle = MESA_create_runtime_log_handle(log_path, log_level);
__ftp_decoder_logger_handle = fenv->logger_handle;
return;
}
void ftp_message_reset_iterator(const struct ftp_message *msg)
{
msg->fctx->parse_result.cursor = 0;
}
static void ftp_ctrl_entry(struct session *sess, struct ftp_context *fctx, struct ftp_decoder_env *fenv)
{
size_t payload_len;
const char *payload = session_get0_current_payload(sess, &payload_len);
int curdir = ftp_session_get_pkt_dir(sess);
if (NULL == payload || payload_len == 0)
{
return;
}
int thread_idx = session_get_current_thread_id(sess);
ftp_cmd_readline(&fctx->cmd_result, payload, payload_len);
ftp_cmd_process(sess, fctx, fenv, curdir);
if (curdir == PACKET_DIRECTION_C2S)
{
ftp_decoder_stat_incrby(thread_idx, fenv, FTPD_STAT_CTRL_LINK_BYTES_C2S, (long long)payload_len);
}
else
{
ftp_decoder_stat_incrby(thread_idx, fenv, FTPD_STAT_CTRL_LINK_BYTES_S2C, (long long)payload_len);
}
}
static void ftp_data_entry(struct session *sess, struct ftp_context *fctx, struct ftp_decoder_env *fenv)
{
enum session_state sstate = session_get_current_state(sess);
if (SESSION_STATE_OPENING == sstate)
{
memset(fctx->parse_result.push_result_flags, 0, sizeof(fctx->parse_result.push_result_flags));
ftp_runtime_log(RLOG_LV_DEBUG, "ftp data link opening: %s", session_get0_readable_addr(sess));
}
size_t payload_len;
const char *payload = session_get0_current_payload(sess, &payload_len);
if (NULL == payload || payload_len == 0)
{
return;
}
enum ftp_msg_type dlink_presentation = fctx->data_link_presentation;
if (FTP_INVENTORY != dlink_presentation && FTP_FILE_CONTENT != dlink_presentation)
{
dlink_presentation = FTP_FILE_CONTENT; // unknown data link type, default as FTP_FILE_CONTENT
}
fctx->parse_result.result_array[dlink_presentation].iov_base = (void *)payload;
fctx->parse_result.result_array[dlink_presentation].iov_len = payload_len;
fctx->parse_result.push_result_flags[dlink_presentation] = 0;
ftp_decoder_push_msg(sess, fctx, fenv);
int thread_idx = session_get_current_thread_id(sess);
int curdir = ftp_session_get_pkt_dir(sess);
if (curdir == PACKET_DIRECTION_C2S)
{
ftp_decoder_stat_incrby(thread_idx, fenv, FTPD_STAT_DATA_LINK_BYTES_C2S, (long long)payload_len);
}
else
{
ftp_decoder_stat_incrby(thread_idx, fenv, FTPD_STAT_DATA_LINK_BYTES_S2C, (long long)payload_len);
}
}
static void ftp_decoder_entry(struct session *sess, int topic_id, const void *msg, void *per_session_ctx, void *plugin_env)
{
struct ftp_context *fctx = (struct ftp_context *)per_session_ctx;
if (FTP_LINK_CTRL == fctx->link_type)
{
ftp_ctrl_entry(sess, fctx, (struct ftp_decoder_env *)plugin_env);
}
else
{
ftp_data_entry(sess, fctx, (struct ftp_decoder_env *)plugin_env);
}
}
int ftp_message_iterate(const struct ftp_message *msg, enum ftp_msg_type *type, struct iovec *value)
{
if (msg->fctx->parse_result.cursor >= FTP_MSG_MAX)
{
return 0;
}
int index = msg->fctx->parse_result.cursor;
for (int i = index; i < (int)FTP_MSG_MAX; i++)
{
if (msg->fctx->parse_result.push_result_flags[i] == 1)
{
continue;
}
if (msg->fctx->parse_result.result_array[i].iov_base == NULL || msg->fctx->parse_result.result_array[i].iov_len == 0)
{
continue;
}
*type = (enum ftp_msg_type)i;
value->iov_base = msg->fctx->parse_result.result_array[i].iov_base;
value->iov_len = msg->fctx->parse_result.result_array[i].iov_len;
msg->fctx->parse_result.push_result_flags[i] = 1;
msg->fctx->parse_result.cursor = index + 1;
return 1;
}
return 0;
}
int ftp_decoder_push_msg(struct session *sess, struct ftp_context *fctx, struct ftp_decoder_env *fenv)
{
struct ftp_message *fmsg = (struct ftp_message *)calloc(1, sizeof(struct ftp_message));
fmsg->fctx = fctx;
fctx->parse_result.cursor = 0;
if (FTP_LINK_CTRL == fctx->link_type)
{
session_mq_publish_message(sess, fenv->ftp_pub_ctrl_topic_id, fmsg);
}
else
{
session_mq_publish_message(sess, fenv->ftp_pub_data_topic_id, fmsg);
}
return 0;
}
extern "C" void *FTP_ONLOAD(struct stellar *st)
{
struct ftp_decoder_env *fenv = (struct ftp_decoder_env *)calloc(1, sizeof(struct ftp_decoder_env));
fenv->thread_count = stellar_get_worker_thread_num(st);
assert(fenv->thread_count >= 1);
fenv->plugin_id = stellar_session_plugin_register(st, ftp_context_ctx_new_cb, ftp_context_ctx_free_cb, fenv);
fenv->tcp_sub_topic_id = stellar_session_mq_get_topic_id(st, TOPIC_TCP_STREAM);
stellar_session_mq_subscribe(st, fenv->tcp_sub_topic_id, ftp_decoder_entry, fenv->plugin_id);
fenv->ftp_pub_ctrl_topic_id = stellar_session_mq_create_topic(st, FTP_DECODER_CTRL_TOPIC, ftp_msg_free_cb, fenv);
fenv->ftp_pub_data_topic_id = stellar_session_mq_create_topic(st, FTP_DECODER_DATA_TOPIC, ftp_msg_free_cb, fenv);
ftp_hash_table_create(fenv);
ftp_decoder_stat_init(fenv);
ftpd_logger_init(fenv);
ftp_runtime_log(RLOG_LV_DEBUG, "FTP_ONLOAD success.");
return fenv;
}
extern "C" void FTP_UNLOAD(void *plugin_env)
{
struct ftp_decoder_env *fenv = (struct ftp_decoder_env *)plugin_env;
ftp_runtime_log(RLOG_LV_DEBUG, "FTP_UNLOAD ...");
ftp_hash_table_destroy(fenv);
ftp_decoder_stat_free(fenv);
__ftp_decoder_logger_handle = NULL;
MESA_destroy_runtime_log_handle(fenv->logger_handle);
free(fenv);
}
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