FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/os_support.c
Date: 2022-12-09 07:38:14
Exec Total Coverage
Lines: 0 4 0.0%
Functions: 0 1 0.0%
Branches: 0 2 0.0%

Line Branch Exec Source
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 "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_GETADDRINFO
47 #if !HAVE_INET_ATON
48 #include <stdlib.h>
49
50 static int inet_aton(const char *str, struct in_addr *add)
51 {
52 unsigned int add1 = 0, add2 = 0, add3 = 0, add4 = 0;
53
54 if (sscanf(str, "%d.%d.%d.%d", &add1, &add2, &add3, &add4) != 4)
55 return 0;
56
57 if (!add1 || (add1 | add2 | add3 | add4) > 255)
58 return 0;
59
60 add->s_addr = htonl((add1 << 24) + (add2 << 16) + (add3 << 8) + add4);
61
62 return 1;
63 }
64 #endif /* !HAVE_INET_ATON */
65
66 int ff_getaddrinfo(const char *node, const char *service,
67 const struct addrinfo *hints, struct addrinfo **res)
68 {
69 struct hostent *h = NULL;
70 struct addrinfo *ai;
71 struct sockaddr_in *sin;
72
73 *res = NULL;
74 sin = av_mallocz(sizeof(struct sockaddr_in));
75 if (!sin)
76 return EAI_FAIL;
77 sin->sin_family = AF_INET;
78
79 if (node) {
80 if (!inet_aton(node, &sin->sin_addr)) {
81 if (hints && (hints->ai_flags & AI_NUMERICHOST)) {
82 av_free(sin);
83 return EAI_FAIL;
84 }
85 h = gethostbyname(node);
86 if (!h) {
87 av_free(sin);
88 return EAI_FAIL;
89 }
90 memcpy(&sin->sin_addr, h->h_addr_list[0], sizeof(struct in_addr));
91 }
92 } else {
93 if (hints && (hints->ai_flags & AI_PASSIVE))
94 sin->sin_addr.s_addr = INADDR_ANY;
95 else
96 sin->sin_addr.s_addr = INADDR_LOOPBACK;
97 }
98
99 /* Note: getaddrinfo allows service to be a string, which
100 * should be looked up using getservbyname. */
101 if (service)
102 sin->sin_port = htons(atoi(service));
103
104 ai = av_mallocz(sizeof(struct addrinfo));
105 if (!ai) {
106 av_free(sin);
107 return EAI_FAIL;
108 }
109
110 *res = ai;
111 ai->ai_family = AF_INET;
112 ai->ai_socktype = hints ? hints->ai_socktype : 0;
113 switch (ai->ai_socktype) {
114 case SOCK_STREAM:
115 ai->ai_protocol = IPPROTO_TCP;
116 break;
117 case SOCK_DGRAM:
118 ai->ai_protocol = IPPROTO_UDP;
119 break;
120 default:
121 ai->ai_protocol = 0;
122 break;
123 }
124
125 ai->ai_addr = (struct sockaddr *)sin;
126 ai->ai_addrlen = sizeof(struct sockaddr_in);
127 if (hints && (hints->ai_flags & AI_CANONNAME))
128 ai->ai_canonname = h ? av_strdup(h->h_name) : NULL;
129
130 ai->ai_next = NULL;
131 return 0;
132 }
133
134 void ff_freeaddrinfo(struct addrinfo *res)
135 {
136 av_freep(&res->ai_canonname);
137 av_freep(&res->ai_addr);
138 av_freep(&res);
139 }
140
141 int ff_getnameinfo(const struct sockaddr *sa, int salen,
142 char *host, int hostlen,
143 char *serv, int servlen, int flags)
144 {
145 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
146
147 if (sa->sa_family != AF_INET)
148 return EAI_FAMILY;
149 if (!host && !serv)
150 return EAI_NONAME;
151
152 if (host && hostlen > 0) {
153 struct hostent *ent = NULL;
154 uint32_t a;
155 if (!(flags & NI_NUMERICHOST))
156 ent = gethostbyaddr((const char *)&sin->sin_addr,
157 sizeof(sin->sin_addr), AF_INET);
158
159 if (ent) {
160 snprintf(host, hostlen, "%s", ent->h_name);
161 } else if (flags & NI_NAMERQD) {
162 return EAI_NONAME;
163 } else {
164 a = ntohl(sin->sin_addr.s_addr);
165 snprintf(host, hostlen, "%d.%d.%d.%d",
166 ((a >> 24) & 0xff), ((a >> 16) & 0xff),
167 ((a >> 8) & 0xff), (a & 0xff));
168 }
169 }
170
171 if (serv && servlen > 0) {
172 if (!(flags & NI_NUMERICSERV))
173 return EAI_FAIL;
174 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
175 }
176
177 return 0;
178 }
179 #endif /* !HAVE_GETADDRINFO */
180
181 #if !HAVE_GETADDRINFO || HAVE_WINSOCK2_H
182 const char *ff_gai_strerror(int ecode)
183 {
184 switch (ecode) {
185 case EAI_AGAIN:
186 return "Temporary failure in name resolution";
187 case EAI_BADFLAGS:
188 return "Invalid flags for ai_flags";
189 case EAI_FAIL:
190 return "A non-recoverable error occurred";
191 case EAI_FAMILY:
192 return "The address family was not recognized or the address "
193 "length was invalid for the specified family";
194 case EAI_MEMORY:
195 return "Memory allocation failure";
196 #if EAI_NODATA != EAI_NONAME
197 case EAI_NODATA:
198 return "No address associated with hostname";
199 #endif /* EAI_NODATA != EAI_NONAME */
200 case EAI_NONAME:
201 return "The name does not resolve for the supplied parameters";
202 case EAI_SERVICE:
203 return "servname not supported for ai_socktype";
204 case EAI_SOCKTYPE:
205 return "ai_socktype not supported";
206 }
207
208 return "Unknown error";
209 }
210 #endif /* !HAVE_GETADDRINFO || HAVE_WINSOCK2_H */
211
212 int ff_socket_nonblock(int socket, int enable)
213 {
214 #if HAVE_WINSOCK2_H
215 u_long param = enable;
216 return ioctlsocket(socket, FIONBIO, &param);
217 #else
218 if (enable)
219 return fcntl(socket, F_SETFL, fcntl(socket, F_GETFL) | O_NONBLOCK);
220 else
221 return fcntl(socket, F_SETFL, fcntl(socket, F_GETFL) & ~O_NONBLOCK);
222 #endif /* HAVE_WINSOCK2_H */
223 }
224
225 #if !HAVE_POLL_H
226 int ff_poll(struct pollfd *fds, nfds_t numfds, int timeout)
227 {
228 fd_set read_set;
229 fd_set write_set;
230 fd_set exception_set;
231 nfds_t i;
232 int n;
233 int rc;
234
235 #if HAVE_WINSOCK2_H
236 if (numfds >= FD_SETSIZE) {
237 errno = EINVAL;
238 return -1;
239 }
240 #endif /* HAVE_WINSOCK2_H */
241
242 FD_ZERO(&read_set);
243 FD_ZERO(&write_set);
244 FD_ZERO(&exception_set);
245
246 n = 0;
247 for (i = 0; i < numfds; i++) {
248 if (fds[i].fd < 0)
249 continue;
250 #if !HAVE_WINSOCK2_H
251 if (fds[i].fd >= FD_SETSIZE) {
252 errno = EINVAL;
253 return -1;
254 }
255 #endif /* !HAVE_WINSOCK2_H */
256
257 if (fds[i].events & POLLIN)
258 FD_SET(fds[i].fd, &read_set);
259 if (fds[i].events & POLLOUT)
260 FD_SET(fds[i].fd, &write_set);
261 if (fds[i].events & POLLERR)
262 FD_SET(fds[i].fd, &exception_set);
263
264 if (fds[i].fd >= n)
265 n = fds[i].fd + 1;
266 }
267
268 if (n == 0)
269 /* Hey!? Nothing to poll, in fact!!! */
270 return 0;
271
272 if (timeout < 0) {
273 rc = select(n, &read_set, &write_set, &exception_set, NULL);
274 } else {
275 struct timeval tv;
276 tv.tv_sec = timeout / 1000;
277 tv.tv_usec = 1000 * (timeout % 1000);
278 rc = select(n, &read_set, &write_set, &exception_set, &tv);
279 }
280
281 if (rc < 0)
282 return rc;
283
284 for (i = 0; i < numfds; i++) {
285 fds[i].revents = 0;
286
287 if (FD_ISSET(fds[i].fd, &read_set))
288 fds[i].revents |= POLLIN;
289 if (FD_ISSET(fds[i].fd, &write_set))
290 fds[i].revents |= POLLOUT;
291 if (FD_ISSET(fds[i].fd, &exception_set))
292 fds[i].revents |= POLLERR;
293 }
294
295 return rc;
296 }
297 #endif /* !HAVE_POLL_H */
298
299 #endif /* CONFIG_NETWORK */
300