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/*-
* SSLsplit - transparent SSL/TLS interception
* https://www.roe.ch/SSLsplit
*
* Copyright (c) 2009-2018, Daniel Roethlisberger <[email protected]>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef PXYCONN_H
#define PXYCONN_H
#include "compat.h"
#include "opts.h"
#include "attrib.h"
#include "pxythrmgr.h"
#include <sys/types.h>
#include <sys/socket.h>
#include <event2/event.h>
#include <event2/util.h>
#include <iterator>
#include <sstream>
/*
* Proxy connection context state, describes a proxy connection
* with source and destination socket bufferevents, SSL context and
* other session state. One of these exists per handled proxy
* connection.
*/
/* single dst or src socket bufferevent descriptor */
typedef struct pxy_conn_desc
{
/* Normal */
struct bufferevent *bev;
SSL *ssl;
unsigned int closed : 1;
/* For Debug */
size_t read_bytes;
size_t write_bytes;
} pxy_conn_desc_t;
/* actual proxy connection state consisting of two connection descriptors,
* connection-wide state and the specs and options */
struct pxy_conn_ctx_extend
{
public:
void WriteDebugInfo(const std::string & str)
{
vec_debug_info.push_back(str);
}
std::string DumpToString()
{
std::ostringstream str_dump_stream;
std::copy(vec_debug_info.begin(), vec_debug_info.end(),std::ostream_iterator<std::string>(str_dump_stream, " "));
return str_dump_stream.str();
}
private:
std::vector<std::string> vec_debug_info;
};
typedef struct pxy_conn_ctx
{
/* per-connection state */
struct pxy_conn_desc src;
struct pxy_conn_desc dst;
/* status flags */
unsigned int connected : 1; /* 0 until both ends are connected */
unsigned int enomem : 1; /* 1 if out of memory */
/* ssl */
unsigned int sni_peek_retries : 6; /* max 64 SNI parse retries */
unsigned int immutable_cert : 1; /* 1 if the cert cannot be changed */
unsigned int generated_cert : 1; /* 1 if we generated a new cert */
unsigned int passthrough : 1; /* 1 if SSL passthrough is active */
/* http */
unsigned int seen_req_header : 1; /* 0 until request header complete */
unsigned int seen_resp_header : 1; /* 0 until response hdr complete */
unsigned int sent_http_conn_close : 1; /* 0 until Conn: close sent */
unsigned int ocsp_denied : 1; /* 1 if OCSP was denied */
/* autossl */
unsigned int clienthello_search : 1; /* 1 if waiting for hello */
unsigned int clienthello_found : 1; /* 1 if conn upgrade to SSL */
/* server name indicated by client in SNI TLS extension */
char *sni;
/* log strings from socket */
char *srchost_str;
char *srcport_str;
char *dsthost_str;
char *dstport_str;
/* log strings from HTTP request */
char *http_method;
char *http_uri;
char *http_host;
char *http_content_type;
/* log strings from HTTP response */
char *http_status_code;
char *http_status_text;
char *http_content_length;
/* log strings related to SSL */
char *ssl_names;
char *origcrtfpr;
char *usedcrtfpr;
/* store fd and fd event while connected is 0 */
evutil_socket_t fd;
struct event *ev;
/* peer fd, used by forge socket */
evutil_socket_t peer_fd;
/* original destination address, family and certificate */
struct sockaddr_storage addr;
socklen_t addrlen;
int af;
X509 *origcrt;
/* references to event base and configuration */
struct event_base *evbase;
struct evdns_base *dnsbase;
int thridx;
tfe_thread_manager_ctx *thrmgr;
proxyspec *spec;
tfe_config *opts;
tfe_instance *instance;
/* Protocol Ctxs*/
void * protocol_conn_ctx;
struct pxy_conn_ctx_extend * extend;
/* SSL CA */
X509 * cacrt;
EVP_PKEY * cakey;
STACK_OF(X509) * chain;
} pxy_conn_ctx_t;
void pxy_conn_setup(evutil_socket_t fd_downstream, evutil_socket_t fd_upstream, struct sockaddr *peeraddr,
int peeraddrlen, tfe_thread_manager_ctx *thrmgr, proxyspec *spec, tfe_config *opts);
#endif /* !PXYCONN_H */
/* vim: set noet ft=c: */
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