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2ba45a60 DM |
1 | /* |
2 | * various OS-feature replacement utilities | |
3 | * Copyright (c) 2000, 2001, 2002 Fabrice Bellard | |
4 | * copyright (c) 2002 Francois Revol | |
5 | * | |
6 | * This file is part of FFmpeg. | |
7 | * | |
8 | * FFmpeg is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License as published by the Free Software Foundation; either | |
11 | * version 2.1 of the License, or (at your option) any later version. | |
12 | * | |
13 | * FFmpeg is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * Lesser General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU Lesser General Public | |
19 | * License along with FFmpeg; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
21 | */ | |
22 | ||
23 | /* needed by inet_aton() */ | |
f6fa7814 | 24 | #define _DEFAULT_SOURCE |
2ba45a60 DM |
25 | #define _SVID_SOURCE |
26 | ||
27 | #include "config.h" | |
28 | #include "avformat.h" | |
29 | #include "os_support.h" | |
30 | ||
31 | #if CONFIG_NETWORK | |
32 | #include <fcntl.h> | |
33 | #if !HAVE_POLL_H | |
34 | #if HAVE_SYS_TIME_H | |
35 | #include <sys/time.h> | |
36 | #endif /* HAVE_SYS_TIME_H */ | |
37 | #if HAVE_WINSOCK2_H | |
38 | #include <winsock2.h> | |
39 | #elif HAVE_SYS_SELECT_H | |
40 | #include <sys/select.h> | |
41 | #endif /* HAVE_WINSOCK2_H */ | |
42 | #endif /* !HAVE_POLL_H */ | |
43 | ||
44 | #include "network.h" | |
45 | ||
46 | #if !HAVE_INET_ATON | |
47 | #include <stdlib.h> | |
48 | ||
49 | int ff_inet_aton(const char *str, struct in_addr *add) | |
50 | { | |
51 | unsigned int add1 = 0, add2 = 0, add3 = 0, add4 = 0; | |
52 | ||
53 | if (sscanf(str, "%d.%d.%d.%d", &add1, &add2, &add3, &add4) != 4) | |
54 | return 0; | |
55 | ||
56 | if (!add1 || (add1 | add2 | add3 | add4) > 255) | |
57 | return 0; | |
58 | ||
59 | add->s_addr = htonl((add1 << 24) + (add2 << 16) + (add3 << 8) + add4); | |
60 | ||
61 | return 1; | |
62 | } | |
63 | #else | |
64 | int ff_inet_aton(const char *str, struct in_addr *add) | |
65 | { | |
66 | return inet_aton(str, add); | |
67 | } | |
68 | #endif /* !HAVE_INET_ATON */ | |
69 | ||
70 | #if !HAVE_GETADDRINFO | |
71 | int ff_getaddrinfo(const char *node, const char *service, | |
72 | const struct addrinfo *hints, struct addrinfo **res) | |
73 | { | |
74 | struct hostent *h = NULL; | |
75 | struct addrinfo *ai; | |
76 | struct sockaddr_in *sin; | |
77 | ||
78 | #if HAVE_WINSOCK2_H | |
79 | int (WSAAPI *win_getaddrinfo)(const char *node, const char *service, | |
80 | const struct addrinfo *hints, | |
81 | struct addrinfo **res); | |
82 | HMODULE ws2mod = GetModuleHandle("ws2_32.dll"); | |
83 | win_getaddrinfo = GetProcAddress(ws2mod, "getaddrinfo"); | |
84 | if (win_getaddrinfo) | |
85 | return win_getaddrinfo(node, service, hints, res); | |
86 | #endif /* HAVE_WINSOCK2_H */ | |
87 | ||
88 | *res = NULL; | |
89 | sin = av_mallocz(sizeof(struct sockaddr_in)); | |
90 | if (!sin) | |
91 | return EAI_FAIL; | |
92 | sin->sin_family = AF_INET; | |
93 | ||
94 | if (node) { | |
95 | if (!ff_inet_aton(node, &sin->sin_addr)) { | |
96 | if (hints && (hints->ai_flags & AI_NUMERICHOST)) { | |
97 | av_free(sin); | |
98 | return EAI_FAIL; | |
99 | } | |
100 | h = gethostbyname(node); | |
101 | if (!h) { | |
102 | av_free(sin); | |
103 | return EAI_FAIL; | |
104 | } | |
105 | memcpy(&sin->sin_addr, h->h_addr_list[0], sizeof(struct in_addr)); | |
106 | } | |
107 | } else { | |
108 | if (hints && (hints->ai_flags & AI_PASSIVE)) | |
109 | sin->sin_addr.s_addr = INADDR_ANY; | |
110 | else | |
111 | sin->sin_addr.s_addr = INADDR_LOOPBACK; | |
112 | } | |
113 | ||
114 | /* Note: getaddrinfo allows service to be a string, which | |
115 | * should be looked up using getservbyname. */ | |
116 | if (service) | |
117 | sin->sin_port = htons(atoi(service)); | |
118 | ||
119 | ai = av_mallocz(sizeof(struct addrinfo)); | |
120 | if (!ai) { | |
121 | av_free(sin); | |
122 | return EAI_FAIL; | |
123 | } | |
124 | ||
125 | *res = ai; | |
126 | ai->ai_family = AF_INET; | |
127 | ai->ai_socktype = hints ? hints->ai_socktype : 0; | |
128 | switch (ai->ai_socktype) { | |
129 | case SOCK_STREAM: | |
130 | ai->ai_protocol = IPPROTO_TCP; | |
131 | break; | |
132 | case SOCK_DGRAM: | |
133 | ai->ai_protocol = IPPROTO_UDP; | |
134 | break; | |
135 | default: | |
136 | ai->ai_protocol = 0; | |
137 | break; | |
138 | } | |
139 | ||
140 | ai->ai_addr = (struct sockaddr *)sin; | |
141 | ai->ai_addrlen = sizeof(struct sockaddr_in); | |
142 | if (hints && (hints->ai_flags & AI_CANONNAME)) | |
143 | ai->ai_canonname = h ? av_strdup(h->h_name) : NULL; | |
144 | ||
145 | ai->ai_next = NULL; | |
146 | return 0; | |
147 | } | |
148 | ||
149 | void ff_freeaddrinfo(struct addrinfo *res) | |
150 | { | |
151 | #if HAVE_WINSOCK2_H | |
152 | void (WSAAPI *win_freeaddrinfo)(struct addrinfo *res); | |
153 | HMODULE ws2mod = GetModuleHandle("ws2_32.dll"); | |
154 | win_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *res)) | |
155 | GetProcAddress(ws2mod, "freeaddrinfo"); | |
156 | if (win_freeaddrinfo) { | |
157 | win_freeaddrinfo(res); | |
158 | return; | |
159 | } | |
160 | #endif /* HAVE_WINSOCK2_H */ | |
161 | ||
162 | av_free(res->ai_canonname); | |
163 | av_free(res->ai_addr); | |
164 | av_free(res); | |
165 | } | |
166 | ||
167 | int ff_getnameinfo(const struct sockaddr *sa, int salen, | |
168 | char *host, int hostlen, | |
169 | char *serv, int servlen, int flags) | |
170 | { | |
171 | const struct sockaddr_in *sin = (const struct sockaddr_in *)sa; | |
172 | ||
173 | #if HAVE_WINSOCK2_H | |
174 | int (WSAAPI *win_getnameinfo)(const struct sockaddr *sa, socklen_t salen, | |
175 | char *host, DWORD hostlen, | |
176 | char *serv, DWORD servlen, int flags); | |
177 | HMODULE ws2mod = GetModuleHandle("ws2_32.dll"); | |
178 | win_getnameinfo = GetProcAddress(ws2mod, "getnameinfo"); | |
179 | if (win_getnameinfo) | |
180 | return win_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags); | |
181 | #endif /* HAVE_WINSOCK2_H */ | |
182 | ||
183 | if (sa->sa_family != AF_INET) | |
184 | return EAI_FAMILY; | |
185 | if (!host && !serv) | |
186 | return EAI_NONAME; | |
187 | ||
188 | if (host && hostlen > 0) { | |
189 | struct hostent *ent = NULL; | |
190 | uint32_t a; | |
191 | if (!(flags & NI_NUMERICHOST)) | |
192 | ent = gethostbyaddr((const char *)&sin->sin_addr, | |
193 | sizeof(sin->sin_addr), AF_INET); | |
194 | ||
195 | if (ent) { | |
196 | snprintf(host, hostlen, "%s", ent->h_name); | |
197 | } else if (flags & NI_NAMERQD) { | |
198 | return EAI_NONAME; | |
199 | } else { | |
200 | a = ntohl(sin->sin_addr.s_addr); | |
201 | snprintf(host, hostlen, "%d.%d.%d.%d", | |
202 | ((a >> 24) & 0xff), ((a >> 16) & 0xff), | |
203 | ((a >> 8) & 0xff), (a & 0xff)); | |
204 | } | |
205 | } | |
206 | ||
207 | if (serv && servlen > 0) { | |
208 | struct servent *ent = NULL; | |
209 | #if HAVE_GETSERVBYPORT | |
210 | if (!(flags & NI_NUMERICSERV)) | |
211 | ent = getservbyport(sin->sin_port, flags & NI_DGRAM ? "udp" : "tcp"); | |
212 | #endif /* HAVE_GETSERVBYPORT */ | |
213 | ||
214 | if (ent) | |
215 | snprintf(serv, servlen, "%s", ent->s_name); | |
216 | else | |
217 | snprintf(serv, servlen, "%d", ntohs(sin->sin_port)); | |
218 | } | |
219 | ||
220 | return 0; | |
221 | } | |
222 | #endif /* !HAVE_GETADDRINFO */ | |
223 | ||
224 | #if !HAVE_GETADDRINFO || HAVE_WINSOCK2_H | |
225 | const char *ff_gai_strerror(int ecode) | |
226 | { | |
227 | switch (ecode) { | |
228 | case EAI_AGAIN: | |
229 | return "Temporary failure in name resolution"; | |
230 | case EAI_BADFLAGS: | |
231 | return "Invalid flags for ai_flags"; | |
232 | case EAI_FAIL: | |
233 | return "A non-recoverable error occurred"; | |
234 | case EAI_FAMILY: | |
235 | return "The address family was not recognized or the address " | |
236 | "length was invalid for the specified family"; | |
237 | case EAI_MEMORY: | |
238 | return "Memory allocation failure"; | |
239 | #if EAI_NODATA != EAI_NONAME | |
240 | case EAI_NODATA: | |
241 | return "No address associated with hostname"; | |
242 | #endif /* EAI_NODATA != EAI_NONAME */ | |
243 | case EAI_NONAME: | |
244 | return "The name does not resolve for the supplied parameters"; | |
245 | case EAI_SERVICE: | |
246 | return "servname not supported for ai_socktype"; | |
247 | case EAI_SOCKTYPE: | |
248 | return "ai_socktype not supported"; | |
249 | } | |
250 | ||
251 | return "Unknown error"; | |
252 | } | |
253 | #endif /* !HAVE_GETADDRINFO || HAVE_WINSOCK2_H */ | |
254 | ||
255 | int ff_socket_nonblock(int socket, int enable) | |
256 | { | |
257 | #if HAVE_WINSOCK2_H | |
258 | u_long param = enable; | |
259 | return ioctlsocket(socket, FIONBIO, ¶m); | |
260 | #else | |
261 | if (enable) | |
262 | return fcntl(socket, F_SETFL, fcntl(socket, F_GETFL) | O_NONBLOCK); | |
263 | else | |
264 | return fcntl(socket, F_SETFL, fcntl(socket, F_GETFL) & ~O_NONBLOCK); | |
265 | #endif /* HAVE_WINSOCK2_H */ | |
266 | } | |
267 | ||
268 | #if !HAVE_POLL_H | |
269 | int ff_poll(struct pollfd *fds, nfds_t numfds, int timeout) | |
270 | { | |
271 | fd_set read_set; | |
272 | fd_set write_set; | |
273 | fd_set exception_set; | |
274 | nfds_t i; | |
275 | int n; | |
276 | int rc; | |
277 | ||
278 | #if HAVE_WINSOCK2_H | |
279 | if (numfds >= FD_SETSIZE) { | |
280 | errno = EINVAL; | |
281 | return -1; | |
282 | } | |
283 | #endif /* HAVE_WINSOCK2_H */ | |
284 | ||
285 | FD_ZERO(&read_set); | |
286 | FD_ZERO(&write_set); | |
287 | FD_ZERO(&exception_set); | |
288 | ||
289 | n = 0; | |
290 | for (i = 0; i < numfds; i++) { | |
291 | if (fds[i].fd < 0) | |
292 | continue; | |
293 | #if !HAVE_WINSOCK2_H | |
294 | if (fds[i].fd >= FD_SETSIZE) { | |
295 | errno = EINVAL; | |
296 | return -1; | |
297 | } | |
298 | #endif /* !HAVE_WINSOCK2_H */ | |
299 | ||
300 | if (fds[i].events & POLLIN) | |
301 | FD_SET(fds[i].fd, &read_set); | |
302 | if (fds[i].events & POLLOUT) | |
303 | FD_SET(fds[i].fd, &write_set); | |
304 | if (fds[i].events & POLLERR) | |
305 | FD_SET(fds[i].fd, &exception_set); | |
306 | ||
307 | if (fds[i].fd >= n) | |
308 | n = fds[i].fd + 1; | |
309 | } | |
310 | ||
311 | if (n == 0) | |
312 | /* Hey!? Nothing to poll, in fact!!! */ | |
313 | return 0; | |
314 | ||
315 | if (timeout < 0) { | |
316 | rc = select(n, &read_set, &write_set, &exception_set, NULL); | |
317 | } else { | |
318 | struct timeval tv; | |
319 | tv.tv_sec = timeout / 1000; | |
320 | tv.tv_usec = 1000 * (timeout % 1000); | |
321 | rc = select(n, &read_set, &write_set, &exception_set, &tv); | |
322 | } | |
323 | ||
324 | if (rc < 0) | |
325 | return rc; | |
326 | ||
327 | for (i = 0; i < numfds; i++) { | |
328 | fds[i].revents = 0; | |
329 | ||
330 | if (FD_ISSET(fds[i].fd, &read_set)) | |
331 | fds[i].revents |= POLLIN; | |
332 | if (FD_ISSET(fds[i].fd, &write_set)) | |
333 | fds[i].revents |= POLLOUT; | |
334 | if (FD_ISSET(fds[i].fd, &exception_set)) | |
335 | fds[i].revents |= POLLERR; | |
336 | } | |
337 | ||
338 | return rc; | |
339 | } | |
340 | #endif /* !HAVE_POLL_H */ | |
341 | ||
342 | #endif /* CONFIG_NETWORK */ |