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178 lines
5.8 KiB
C
178 lines
5.8 KiB
C
/*-
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* SSLsplit - transparent SSL/TLS interception
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* https://www.roe.ch/SSLsplit
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*
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* Copyright (c) 2009-2019, Daniel Roethlisberger <daniel@roe.ch>.
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* Copyright (c) 2017-2020, Soner Tari <sonertari@gmail.com>.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef PXYCONN_H
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#define PXYCONN_H
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#if defined(__FreeBSD__) || defined(__DragonFly__)
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#include <netinet/in.h>
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#endif
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#include "proxy.h"
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#include "opts.h"
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#include "attrib.h"
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#include "pxythrmgr.h"
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#include "log.h"
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <event2/buffer.h>
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#include <event2/bufferevent.h>
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#define WANT_CONNECT_LOG(ctx) ((ctx)->opts->connectlog||!(ctx)->opts->detach||(ctx)->opts->statslog)
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#define WANT_CONTENT_LOG(ctx) ((ctx)->opts->contentlog)
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typedef void (*callback_func_t)(struct bufferevent *, void *);
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typedef void (*eventcb_func_t)(struct bufferevent *, short, void *);
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typedef void (*bev_free_func_t)(struct bufferevent *, pxy_conn_ctx_t *);
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/*
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* Proxy connection context state, describes a proxy connection
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* with source and destination socket bufferevents, SSL context and
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* other session state. One of these exists per handled proxy
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* connection.
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*/
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/* single socket bufferevent descriptor */
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typedef struct pxy_conn_desc {
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struct bufferevent *bev;
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unsigned int closed : 1;
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bev_free_func_t free;
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} pxy_conn_desc_t;
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typedef enum protocol {
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PROTO_ERROR = -1,
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PROTO_TCP = 0,
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} protocol_t;
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typedef struct proto_ctx proto_ctx_t;
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struct proto_ctx {
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protocol_t proto;
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callback_func_t bev_readcb;
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callback_func_t bev_writecb;
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eventcb_func_t bev_eventcb;
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};
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/* connection state consisting of two connection descriptors,
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* connection-wide state and the specs and options */
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struct pxy_conn_ctx {
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protocol_t proto;
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/* per-connection state */
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struct pxy_conn_desc src;
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struct pxy_conn_desc dst;
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/* store fd and fd event while connected is 0 */
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evutil_socket_t fd;
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// For protocol specific fields, never NULL
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proto_ctx_t *protoctx;
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/* log strings from socket */
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char *srchost_str;
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char *srcport_str;
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char *dsthost_str;
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char *dstport_str;
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/* content log context */
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log_content_ctx_t logctx;
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/* status flags */
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unsigned int src_connected : 1; /* 0 until src connected */
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unsigned int dst_connected : 1; /* 0 until dst connected */
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unsigned int enomem : 1; /* 1 if out of memory */
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unsigned int term : 1; /* 0 until term requested */
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unsigned int term_requestor : 1; /* 1 client, 0 server side */
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unsigned int seen_sslproxy_line : 1; /* 1 if seen sslproxy line */
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struct event *ev;
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/* original source and destination address */
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struct sockaddr_storage srcaddr;
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socklen_t srcaddrlen;
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struct sockaddr_storage dstaddr;
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socklen_t dstaddrlen;
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// Thread that the conn is attached to
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pxy_thr_ctx_t *thr;
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// Unique id of the conn
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long long unsigned int id;
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pxy_thrmgr_ctx_t *thrmgr;
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opts_t *opts;
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evutil_socket_t dst_fd;
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// Conn create time
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time_t ctime;
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// Conn last access time, used to determine expired conns
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// Updated on entry to callback functions, parent or child
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time_t atime;
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// Per-thread conn list, used to determine idle and expired conns, and to close them
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pxy_conn_ctx_t *next;
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pxy_conn_ctx_t *prev;
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};
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void pxy_log_connect(pxy_conn_ctx_t *) NONNULL(1);
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int pxy_log_content_inbuf(pxy_conn_ctx_t *, struct evbuffer *, int) NONNULL(1);
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void pxy_log_connect_nonhttp(pxy_conn_ctx_t *) NONNULL(1);
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void pxy_log_dbg_evbuf_info(pxy_conn_ctx_t *, pxy_conn_desc_t *, pxy_conn_desc_t *) NONNULL(1,2,3);
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void pxy_try_set_watermark(struct bufferevent *, pxy_conn_ctx_t *, struct bufferevent *) NONNULL(1,2,3);
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void pxy_try_unset_watermark(struct bufferevent *, pxy_conn_ctx_t *, pxy_conn_desc_t *) NONNULL(1,2,3);
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int pxy_try_close_conn_end(pxy_conn_desc_t *, pxy_conn_ctx_t *) NONNULL(1,2);
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void pxy_try_disconnect(pxy_conn_ctx_t *, pxy_conn_desc_t *, pxy_conn_desc_t *, int) NONNULL(1,2,3);
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int pxy_try_consume_last_input(struct bufferevent *, pxy_conn_ctx_t *) NONNULL(1,2);
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void pxy_discard_inbuf(struct bufferevent *) NONNULL(1);
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void pxy_conn_ctx_free(pxy_conn_ctx_t *, int) NONNULL(1);
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void pxy_conn_free(pxy_conn_ctx_t *, int) NONNULL(1);
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void pxy_conn_term(pxy_conn_ctx_t *, int) NONNULL(1);
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int pxy_bev_readcb_preexec_logging_and_stats(struct bufferevent *, pxy_conn_ctx_t *) NONNULL(1,2);
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int pxy_bev_eventcb_postexec_logging_and_stats(struct bufferevent *, short , pxy_conn_ctx_t *) NONNULL(1,3);
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void pxy_bev_readcb(struct bufferevent *, void *);
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void pxy_bev_writecb(struct bufferevent *, void *);
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void pxy_bev_eventcb(struct bufferevent *, short, void *);
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#endif /* !PXYCONN_H */
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/* vim: set noet ft=c: */
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