network: Don't redefine error codes if they already exist in errno.h
[libav.git] / libavformat / network.c
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1/*
2 * Copyright (c) 2007 The Libav Project
3 *
4 * This file is part of Libav.
5 *
6 * Libav is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * Libav is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21#include "network.h"
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22#include "libavcodec/internal.h"
23
24#define THREADS (HAVE_PTHREADS || (defined(WIN32) && !defined(__MINGW32CE__)))
25
26#if THREADS
27#if HAVE_PTHREADS
28#include <pthread.h>
29#else
30#include "libavcodec/w32pthreads.h"
31#endif
32#endif
33
34#if CONFIG_OPENSSL
35#include <openssl/ssl.h>
36static int openssl_init;
37#if THREADS
38#include <openssl/crypto.h>
39#include "libavutil/avutil.h"
40pthread_mutex_t *openssl_mutexes;
41static void openssl_lock(int mode, int type, const char *file, int line)
42{
43 if (mode & CRYPTO_LOCK)
44 pthread_mutex_lock(&openssl_mutexes[type]);
45 else
46 pthread_mutex_unlock(&openssl_mutexes[type]);
47}
24612846 48#if !defined(WIN32) && OPENSSL_VERSION_NUMBER < 0x10000000
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49static unsigned long openssl_thread_id(void)
50{
51 return (intptr_t) pthread_self();
52}
53#endif
54#endif
55#endif
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56#if CONFIG_GNUTLS
57#include <gnutls/gnutls.h>
58#if THREADS && GNUTLS_VERSION_NUMBER <= 0x020b00
59#include <gcrypt.h>
60#include <errno.h>
61#undef malloc
62#undef free
63GCRY_THREAD_OPTION_PTHREAD_IMPL;
64#endif
65#endif
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66
67void ff_tls_init(void)
68{
69 avpriv_lock_avformat();
70#if CONFIG_OPENSSL
71 if (!openssl_init) {
72 SSL_library_init();
73 SSL_load_error_strings();
74#if THREADS
75 if (!CRYPTO_get_locking_callback()) {
76 int i;
77 openssl_mutexes = av_malloc(sizeof(pthread_mutex_t) * CRYPTO_num_locks());
78 for (i = 0; i < CRYPTO_num_locks(); i++)
79 pthread_mutex_init(&openssl_mutexes[i], NULL);
80 CRYPTO_set_locking_callback(openssl_lock);
24612846 81#if !defined(WIN32) && OPENSSL_VERSION_NUMBER < 0x10000000
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82 CRYPTO_set_id_callback(openssl_thread_id);
83#endif
84 }
85#endif
86 }
87 openssl_init++;
88#endif
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89#if CONFIG_GNUTLS
90#if THREADS && GNUTLS_VERSION_NUMBER < 0x020b00
91 if (gcry_control(GCRYCTL_ANY_INITIALIZATION_P) == 0)
92 gcry_control(GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
93#endif
94 gnutls_global_init();
95#endif
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96 avpriv_unlock_avformat();
97}
98
99void ff_tls_deinit(void)
100{
101 avpriv_lock_avformat();
102#if CONFIG_OPENSSL
103 openssl_init--;
104 if (!openssl_init) {
105#if THREADS
106 if (CRYPTO_get_locking_callback() == openssl_lock) {
107 int i;
108 CRYPTO_set_locking_callback(NULL);
109 for (i = 0; i < CRYPTO_num_locks(); i++)
110 pthread_mutex_destroy(&openssl_mutexes[i]);
111 av_free(openssl_mutexes);
112 }
113#endif
114 }
115#endif
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116#if CONFIG_GNUTLS
117 gnutls_global_deinit();
118#endif
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119 avpriv_unlock_avformat();
120}
f6d37100 121
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122int ff_network_inited_globally;
123
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124int ff_network_init(void)
125{
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126#if HAVE_WINSOCK2_H
127 WSADATA wsaData;
128#endif
129
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130 if (!ff_network_inited_globally)
131 av_log(NULL, AV_LOG_WARNING, "Using network protocols without global "
132 "network initialization. Please use "
133 "avformat_network_init(), this will "
134 "become mandatory later.\n");
f6d37100 135#if HAVE_WINSOCK2_H
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136 if (WSAStartup(MAKEWORD(1,1), &wsaData))
137 return 0;
138#endif
139 return 1;
140}
141
142int ff_network_wait_fd(int fd, int write)
143{
144 int ev = write ? POLLOUT : POLLIN;
145 struct pollfd p = { .fd = fd, .events = ev, .revents = 0 };
146 int ret;
147 ret = poll(&p, 1, 100);
148 return ret < 0 ? ff_neterrno() : p.revents & (ev | POLLERR | POLLHUP) ? 0 : AVERROR(EAGAIN);
149}
150
151void ff_network_close(void)
152{
153#if HAVE_WINSOCK2_H
154 WSACleanup();
155#endif
156}
157
158#if HAVE_WINSOCK2_H
159int ff_neterrno(void)
160{
161 int err = WSAGetLastError();
162 switch (err) {
163 case WSAEWOULDBLOCK:
164 return AVERROR(EAGAIN);
165 case WSAEINTR:
166 return AVERROR(EINTR);
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167 case WSAEPROTONOSUPPORT:
168 return AVERROR(EPROTONOSUPPORT);
169 case WSAETIMEDOUT:
170 return AVERROR(ETIMEDOUT);
171 case WSAECONNREFUSED:
172 return AVERROR(ECONNREFUSED);
173 case WSAEINPROGRESS:
174 return AVERROR(EINPROGRESS);
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175 }
176 return -err;
177}
178#endif
179
180int ff_is_multicast_address(struct sockaddr *addr)
181{
182 if (addr->sa_family == AF_INET) {
183 return IN_MULTICAST(ntohl(((struct sockaddr_in *)addr)->sin_addr.s_addr));
184 }
185#if HAVE_STRUCT_SOCKADDR_IN6
186 if (addr->sa_family == AF_INET6) {
187 return IN6_IS_ADDR_MULTICAST(&((struct sockaddr_in6 *)addr)->sin6_addr);
188 }
189#endif
190
191 return 0;
192}