FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/os_support.c
Date: 2025-12-16 02:06:53
Exec Total Coverage
Lines: 0 4 0.0%
Functions: 0 1 0.0%
Branches: 0 2 0.0%
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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() */
24 #define _DEFAULT_SOURCE
25 #define _SVID_SOURCE
26
27 #include "config.h"
28 #include "libavutil/mem.h"
29 #include "avformat.h"
30 #include "os_support.h"
31
32 #if CONFIG_NETWORK
33 #include <fcntl.h>
34 #if !HAVE_POLL_H
35 #if HAVE_SYS_TIME_H
36 #include <sys/time.h>
37 #endif /* HAVE_SYS_TIME_H */
38 #if HAVE_SYS_SELECT_H
39 #include <sys/select.h>
40 #endif /* HAVE_SYS_SELECT_H */
41 #endif /* !HAVE_POLL_H */
42
43 #include "network.h"
44
45 #if !HAVE_GETADDRINFO
46 #if !HAVE_INET_ATON
47 #include <stdlib.h>
48
49 static int 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 #endif /* !HAVE_INET_ATON */
64
65 int ff_getaddrinfo(const char *node, const char *service,
66 const struct addrinfo *hints, struct addrinfo **res)
67 {
68 struct hostent *h = NULL;
69 struct addrinfo *ai;
70 struct sockaddr_in *sin;
71
72 *res = NULL;
73 sin = av_mallocz(sizeof(struct sockaddr_in));
74 if (!sin)
75 return EAI_FAIL;
76 sin->sin_family = AF_INET;
77
78 if (node) {
79 if (!inet_aton(node, &sin->sin_addr)) {
80 if (hints && (hints->ai_flags & AI_NUMERICHOST)) {
81 av_free(sin);
82 return EAI_FAIL;
83 }
84 h = gethostbyname(node);
85 if (!h) {
86 av_free(sin);
87 return EAI_FAIL;
88 }
89 memcpy(&sin->sin_addr, h->h_addr_list[0], sizeof(struct in_addr));
90 }
91 } else {
92 if (hints && (hints->ai_flags & AI_PASSIVE))
93 sin->sin_addr.s_addr = INADDR_ANY;
94 else
95 sin->sin_addr.s_addr = INADDR_LOOPBACK;
96 }
97
98 /* Note: getaddrinfo allows service to be a string, which
99 * should be looked up using getservbyname. */
100 if (service)
101 sin->sin_port = htons(atoi(service));
102
103 ai = av_mallocz(sizeof(struct addrinfo));
104 if (!ai) {
105 av_free(sin);
106 return EAI_FAIL;
107 }
108
109 *res = ai;
110 ai->ai_family = AF_INET;
111 ai->ai_socktype = hints ? hints->ai_socktype : 0;
112 switch (ai->ai_socktype) {
113 case SOCK_STREAM:
114 ai->ai_protocol = IPPROTO_TCP;
115 break;
116 case SOCK_DGRAM:
117 ai->ai_protocol = IPPROTO_UDP;
118 break;
119 default:
120 ai->ai_protocol = 0;
121 break;
122 }
123
124 ai->ai_addr = (struct sockaddr *)sin;
125 ai->ai_addrlen = sizeof(struct sockaddr_in);
126 if (hints && (hints->ai_flags & AI_CANONNAME))
127 ai->ai_canonname = h ? av_strdup(h->h_name) : NULL;
128
129 ai->ai_next = NULL;
130 return 0;
131 }
132
133 void ff_freeaddrinfo(struct addrinfo *res)
134 {
135 av_freep(&res->ai_canonname);
136 av_freep(&res->ai_addr);
137 av_freep(&res);
138 }
139
140 int ff_getnameinfo(const struct sockaddr *sa, int salen,
141 char *host, int hostlen,
142 char *serv, int servlen, int flags)
143 {
144 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
145
146 if (sa->sa_family != AF_INET)
147 return EAI_FAMILY;
148 if (!host && !serv)
149 return EAI_NONAME;
150
151 if (host && hostlen > 0) {
152 struct hostent *ent = NULL;
153 uint32_t a;
154 if (!(flags & NI_NUMERICHOST))
155 ent = gethostbyaddr((const char *)&sin->sin_addr,
156 sizeof(sin->sin_addr), AF_INET);
157
158 if (ent) {
159 snprintf(host, hostlen, "%s", ent->h_name);
160 } else if (flags & NI_NAMERQD) {
161 return EAI_NONAME;
162 } else {
163 a = ntohl(sin->sin_addr.s_addr);
164 snprintf(host, hostlen, "%d.%d.%d.%d",
165 ((a >> 24) & 0xff), ((a >> 16) & 0xff),
166 ((a >> 8) & 0xff), (a & 0xff));
167 }
168 }
169
170 if (serv && servlen > 0) {
171 if (!(flags & NI_NUMERICSERV))
172 return EAI_FAIL;
173 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
174 }
175
176 return 0;
177 }
178 #endif /* !HAVE_GETADDRINFO */
179
180 #if !HAVE_GETADDRINFO || HAVE_WINSOCK2_H
181 const char *ff_gai_strerror(int ecode)
182 {
183 switch (ecode) {
184 case EAI_AGAIN:
185 return "Temporary failure in name resolution";
186 case EAI_BADFLAGS:
187 return "Invalid flags for ai_flags";
188 case EAI_FAIL:
189 return "A non-recoverable error occurred";
190 case EAI_FAMILY:
191 return "The address family was not recognized or the address "
192 "length was invalid for the specified family";
193 case EAI_MEMORY:
194 return "Memory allocation failure";
195 #if EAI_NODATA != EAI_NONAME
196 case EAI_NODATA:
197 return "No address associated with hostname";
198 #endif /* EAI_NODATA != EAI_NONAME */
199 case EAI_NONAME:
200 return "The name does not resolve for the supplied parameters";
201 case EAI_SERVICE:
202 return "servname not supported for ai_socktype";
203 case EAI_SOCKTYPE:
204 return "ai_socktype not supported";
205 }
206
207 return "Unknown error";
208 }
209 #endif /* !HAVE_GETADDRINFO || HAVE_WINSOCK2_H */
210
211 ✗ int ff_socket_nonblock(int socket, int enable)
212 {
213 #if HAVE_WINSOCK2_H
214 u_long param = enable;
215 return ioctlsocket(socket, FIONBIO, &param);
216 #else
217 ✗ if (enable)
218 ✗ return fcntl(socket, F_SETFL, fcntl(socket, F_GETFL) | O_NONBLOCK);
219 else
220 ✗ return fcntl(socket, F_SETFL, fcntl(socket, F_GETFL) & ~O_NONBLOCK);
221 #endif /* HAVE_WINSOCK2_H */
222 }
223
224 #if !HAVE_POLL_H
225 int ff_poll(struct pollfd *fds, nfds_t numfds, int timeout)
226 {
227 fd_set read_set;
228 fd_set write_set;
229 fd_set exception_set;
230 nfds_t i;
231 int n;
232 int rc;
233
234 #if HAVE_WINSOCK2_H
235 if (numfds >= FD_SETSIZE) {
236 errno = EINVAL;
237 return -1;
238 }
239 #endif /* HAVE_WINSOCK2_H */
240
241 FD_ZERO(&read_set);
242 FD_ZERO(&write_set);
243 FD_ZERO(&exception_set);
244
245 n = 0;
246 for (i = 0; i < numfds; i++) {
247 #if !HAVE_WINSOCK2_H
248 if (fds[i].fd < 0)
249 continue;
250 if (fds[i].fd >= FD_SETSIZE) {
251 errno = EINVAL;
252 return -1;
253 }
254 #else
255 if (fds[i].fd == INVALID_SOCKET)
256 continue;
257 #endif /* !HAVE_WINSOCK2_H */
258
259 if (fds[i].events & POLLIN)
260 FD_SET(fds[i].fd, &read_set);
261 if (fds[i].events & POLLOUT)
262 FD_SET(fds[i].fd, &write_set);
263 if (fds[i].events & POLLERR)
264 FD_SET(fds[i].fd, &exception_set);
265
266 if (fds[i].fd >= n)
267 n = fds[i].fd + 1;
268 }
269
270 if (n == 0)
271 /* Hey!? Nothing to poll, in fact!!! */
272 return 0;
273
274 if (timeout < 0) {
275 rc = select(n, &read_set, &write_set, &exception_set, NULL);
276 } else {
277 struct timeval tv;
278 tv.tv_sec = timeout / 1000;
279 tv.tv_usec = 1000 * (timeout % 1000);
280 rc = select(n, &read_set, &write_set, &exception_set, &tv);
281 }
282
283 if (rc < 0)
284 return rc;
285
286 for (i = 0; i < numfds; i++) {
287 fds[i].revents = 0;
288
289 if (FD_ISSET(fds[i].fd, &read_set))
290 fds[i].revents |= POLLIN;
291 if (FD_ISSET(fds[i].fd, &write_set))
292 fds[i].revents |= POLLOUT;
293 if (FD_ISSET(fds[i].fd, &exception_set))
294 fds[i].revents |= POLLERR;
295 }
296
297 return rc;
298 }
299 #endif /* !HAVE_POLL_H */
300
301 #endif /* CONFIG_NETWORK */
302