1 /*
2 * TLS/SSL Protocol
3 * Copyright (c) 2011 Martin Storsjo
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "avformat.h"
23 #include "internal.h"
24 #include "network.h"
25 #include "os_support.h"
26 #include "url.h"
27 #include "tls.h"
28 #include "libavutil/avstring.h"
29 #include "libavutil/getenv_utf8.h"
30 #include "libavutil/opt.h"
31 #include "libavutil/parseutils.h"
32
set_options(TLSShared * c,const char * uri)33 static void set_options(TLSShared *c, const char *uri)
34 {
35 char buf[1024];
36 const char *p = strchr(uri, '?');
37 if (!p)
38 return;
39
40 if (!c->ca_file && av_find_info_tag(buf, sizeof(buf), "cafile", p))
41 c->ca_file = av_strdup(buf);
42
43 if (!c->verify && av_find_info_tag(buf, sizeof(buf), "verify", p)) {
44 char *endptr = NULL;
45 c->verify = strtol(buf, &endptr, 10);
46 if (buf == endptr)
47 c->verify = 1;
48 }
49
50 if (!c->cert_file && av_find_info_tag(buf, sizeof(buf), "cert", p))
51 c->cert_file = av_strdup(buf);
52
53 if (!c->key_file && av_find_info_tag(buf, sizeof(buf), "key", p))
54 c->key_file = av_strdup(buf);
55 }
56
ff_tls_open_underlying(TLSShared * c,URLContext * parent,const char * uri,AVDictionary ** options)57 int ff_tls_open_underlying(TLSShared *c, URLContext *parent, const char *uri, AVDictionary **options)
58 {
59 int port;
60 const char *p;
61 char buf[200], opts[50] = "";
62 struct addrinfo hints = { 0 }, *ai = NULL;
63 const char *proxy_path;
64 char *env_http_proxy, *env_no_proxy;
65 int use_proxy;
66
67 set_options(c, uri);
68
69 if (c->listen)
70 snprintf(opts, sizeof(opts), "?listen=1");
71
72 av_url_split(NULL, 0, NULL, 0, c->underlying_host, sizeof(c->underlying_host), &port, NULL, 0, uri);
73
74 p = strchr(uri, '?');
75
76 if (!p) {
77 p = opts;
78 } else {
79 if (av_find_info_tag(opts, sizeof(opts), "listen", p))
80 c->listen = 1;
81 }
82
83 ff_url_join(buf, sizeof(buf), "tcp", NULL, c->underlying_host, port, "%s", p);
84
85 hints.ai_flags = AI_NUMERICHOST;
86 if (!getaddrinfo(c->underlying_host, NULL, &hints, &ai)) {
87 c->numerichost = 1;
88 freeaddrinfo(ai);
89 }
90
91 if (!c->host && !(c->host = av_strdup(c->underlying_host)))
92 return AVERROR(ENOMEM);
93
94 env_http_proxy = getenv_utf8("http_proxy");
95 proxy_path = c->http_proxy ? c->http_proxy : env_http_proxy;
96
97 env_no_proxy = getenv_utf8("no_proxy");
98 use_proxy = !ff_http_match_no_proxy(env_no_proxy, c->underlying_host) &&
99 proxy_path && av_strstart(proxy_path, "http://", NULL);
100 freeenv_utf8(env_no_proxy);
101
102 if (use_proxy) {
103 char proxy_host[200], proxy_auth[200], dest[200];
104 int proxy_port;
105 av_url_split(NULL, 0, proxy_auth, sizeof(proxy_auth),
106 proxy_host, sizeof(proxy_host), &proxy_port, NULL, 0,
107 proxy_path);
108 ff_url_join(dest, sizeof(dest), NULL, NULL, c->underlying_host, port, NULL);
109 ff_url_join(buf, sizeof(buf), "httpproxy", proxy_auth, proxy_host,
110 proxy_port, "/%s", dest);
111 }
112
113 freeenv_utf8(env_http_proxy);
114 return ffurl_open_whitelist(&c->tcp, buf, AVIO_FLAG_READ_WRITE,
115 &parent->interrupt_callback, options,
116 parent->protocol_whitelist, parent->protocol_blacklist, parent);
117 }
118