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ffmpeg / libavformat / udp.c @ 20cd83e2

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1 de6d9b64 Fabrice Bellard
/*
2
 * UDP prototype streaming system
3 2d225591 Fabrice Bellard
 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
4 de6d9b64 Fabrice Bellard
 *
5 b78e7197 Diego Biurrun
 * This file is part of FFmpeg.
6
 *
7
 * FFmpeg is free software; you can redistribute it and/or
8 19720f15 Fabrice Bellard
 * modify it under the terms of the GNU Lesser General Public
9
 * License as published by the Free Software Foundation; either
10 b78e7197 Diego Biurrun
 * version 2.1 of the License, or (at your option) any later version.
11 de6d9b64 Fabrice Bellard
 *
12 b78e7197 Diego Biurrun
 * FFmpeg is distributed in the hope that it will be useful,
13 de6d9b64 Fabrice Bellard
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 19720f15 Fabrice Bellard
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
16 de6d9b64 Fabrice Bellard
 *
17 19720f15 Fabrice Bellard
 * You should have received a copy of the GNU Lesser General Public
18 b78e7197 Diego Biurrun
 * License along with FFmpeg; if not, write to the Free Software
19 5509bffa Diego Biurrun
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 de6d9b64 Fabrice Bellard
 */
21 8be1c656 Fabrice Bellard
#include "avformat.h"
22 de6d9b64 Fabrice Bellard
#include <unistd.h>
23
#include <sys/types.h>
24 b8a78f41 Michael Niedermayer
#include <sys/socket.h>
25 de6d9b64 Fabrice Bellard
#include <netinet/in.h>
26 9ddd71fc François Revol
#ifndef __BEOS__
27
# include <arpa/inet.h>
28
#else
29
# include "barpainet.h"
30
#endif
31 de6d9b64 Fabrice Bellard
#include <netdb.h>
32
33 9c633e9a Alex Beregszaszi
#ifndef IPV6_ADD_MEMBERSHIP
34
#define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
35
#define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP
36
#endif
37
38 de6d9b64 Fabrice Bellard
typedef struct {
39 2d225591 Fabrice Bellard
    int udp_fd;
40
    int ttl;
41
    int is_multicast;
42
    int local_port;
43 34ecc397 Thijs
    int reuse_socket;
44 7a91333f Hans Zandbelt
#ifndef CONFIG_IPV6
45 2d225591 Fabrice Bellard
    struct ip_mreq mreq;
46
    struct sockaddr_in dest_addr;
47 7a91333f Hans Zandbelt
#else
48
    struct sockaddr_storage dest_addr;
49
    size_t dest_addr_len;
50
#endif
51 de6d9b64 Fabrice Bellard
} UDPContext;
52
53
#define UDP_TX_BUF_SIZE 32768
54
55 7a91333f Hans Zandbelt
#ifdef CONFIG_IPV6
56
57 7b49ce2e Stefan Huehner
static int udp_ipv6_is_multicast_address(const struct sockaddr *addr) {
58 7a91333f Hans Zandbelt
    if (addr->sa_family == AF_INET)
59 115329f1 Diego Biurrun
        return IN_MULTICAST(ntohl(((struct sockaddr_in *)addr)->sin_addr.s_addr));
60 7a91333f Hans Zandbelt
    if (addr->sa_family == AF_INET6)
61 115329f1 Diego Biurrun
        return IN6_IS_ADDR_MULTICAST(&((struct sockaddr_in6 *)addr)->sin6_addr);
62 7a91333f Hans Zandbelt
    return -1;
63
}
64
65 7b49ce2e Stefan Huehner
static int udp_ipv6_set_multicast_ttl(int sockfd, int mcastTTL, struct sockaddr *addr) {
66 7a91333f Hans Zandbelt
    if (addr->sa_family == AF_INET) {
67
        if (setsockopt(sockfd, IPPROTO_IP, IP_MULTICAST_TTL, &mcastTTL, sizeof(mcastTTL)) < 0) {
68
            perror("setsockopt(IP_MULTICAST_TTL)");
69
            return -1;
70
        }
71
    }
72
    if (addr->sa_family == AF_INET6) {
73
        if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &mcastTTL, sizeof(mcastTTL)) < 0) {
74
            perror("setsockopt(IPV6_MULTICAST_HOPS)");
75
            return -1;
76
        }
77
    }
78
    return 0;
79
}
80
81 7b49ce2e Stefan Huehner
static int udp_ipv6_join_multicast_group(int sockfd, struct sockaddr *addr) {
82 7a91333f Hans Zandbelt
    struct ip_mreq   mreq;
83 115329f1 Diego Biurrun
    struct ipv6_mreq mreq6;
84 7a91333f Hans Zandbelt
    if (addr->sa_family == AF_INET) {
85
        mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
86
        mreq.imr_interface.s_addr= INADDR_ANY;
87
        if (setsockopt(sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
88
            perror("setsockopt(IP_ADD_MEMBERSHIP)");
89
            return -1;
90
        }
91
    }
92
    if (addr->sa_family == AF_INET6) {
93
        memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
94
        mreq6.ipv6mr_interface= 0;
95
        if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
96
            perror("setsockopt(IPV6_ADD_MEMBERSHIP)");
97
            return -1;
98
        }
99
    }
100
    return 0;
101
}
102
103 7b49ce2e Stefan Huehner
static int udp_ipv6_leave_multicast_group(int sockfd, struct sockaddr *addr) {
104 7a91333f Hans Zandbelt
    struct ip_mreq   mreq;
105 115329f1 Diego Biurrun
    struct ipv6_mreq mreq6;
106 7a91333f Hans Zandbelt
    if (addr->sa_family == AF_INET) {
107
        mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
108
        mreq.imr_interface.s_addr= INADDR_ANY;
109
        if (setsockopt(sockfd, IPPROTO_IP, IP_DROP_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
110
            perror("setsockopt(IP_DROP_MEMBERSHIP)");
111
            return -1;
112
        }
113
    }
114
    if (addr->sa_family == AF_INET6) {
115
        memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
116
        mreq6.ipv6mr_interface= 0;
117
        if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
118
            perror("setsockopt(IPV6_DROP_MEMBERSHIP)");
119
            return -1;
120
        }
121
    }
122
    return 0;
123
}
124
125 7b49ce2e Stefan Huehner
static struct addrinfo* udp_ipv6_resolve_host(const char *hostname, int port, int type, int family, int flags) {
126 7a91333f Hans Zandbelt
    struct addrinfo hints, *res = 0;
127
    int error;
128
    char sport[16];
129
    const char *node = 0, *service = 0;
130
131
    if (port > 0) {
132 2fc8ea24 Michael Niedermayer
        snprintf(sport, sizeof(sport), "%d", port);
133 7a91333f Hans Zandbelt
        service = sport;
134
    }
135
    if ((hostname) && (hostname[0] != '\0') && (hostname[0] != '?')) {
136
        node = hostname;
137
    }
138
    if ((node) || (service)) {
139
        memset(&hints, 0, sizeof(hints));
140
        hints.ai_socktype = type;
141
        hints.ai_family   = family;
142 115329f1 Diego Biurrun
        hints.ai_flags = flags;
143 7a91333f Hans Zandbelt
        if ((error = getaddrinfo(node, service, &hints, &res))) {
144 58379c06 Benjamin Larsson
            av_log(NULL, AV_LOG_ERROR, "udp_ipv6_resolve_host: %s\n", gai_strerror(error));
145 7a91333f Hans Zandbelt
        }
146
    }
147
    return res;
148
}
149
150 7b49ce2e Stefan Huehner
static int udp_ipv6_set_remote_url(URLContext *h, const char *uri) {
151 7a91333f Hans Zandbelt
    UDPContext *s = h->priv_data;
152
    char hostname[256];
153
    int port;
154
    struct addrinfo *res0;
155
    url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
156
    res0 = udp_ipv6_resolve_host(hostname, port, SOCK_DGRAM, AF_UNSPEC, 0);
157
    if (res0 == 0) return AVERROR_IO;
158
    memcpy(&s->dest_addr, res0->ai_addr, res0->ai_addrlen);
159
    s->dest_addr_len = res0->ai_addrlen;
160
    freeaddrinfo(res0);
161
    return 0;
162
}
163
164 7b49ce2e Stefan Huehner
static int udp_ipv6_set_local(URLContext *h) {
165 7a91333f Hans Zandbelt
    UDPContext *s = h->priv_data;
166
    int udp_fd = -1;
167
    struct sockaddr_storage clientaddr;
168
    socklen_t addrlen;
169
    char sbuf[NI_MAXSERV];
170
    char hbuf[NI_MAXHOST];
171 276358c1 Hans Zandbelt
    struct addrinfo *res0 = NULL, *res = NULL;
172 115329f1 Diego Biurrun
173
    if (s->local_port != 0) {
174 7a91333f Hans Zandbelt
        res0 = udp_ipv6_resolve_host(0, s->local_port, SOCK_DGRAM, AF_UNSPEC, AI_PASSIVE);
175 88730be6 Måns Rullgård
        if (res0 == 0)
176
            goto fail;
177 115329f1 Diego Biurrun
        for (res = res0; res; res=res->ai_next) {
178 276358c1 Hans Zandbelt
            udp_fd = socket(res->ai_family, SOCK_DGRAM, 0);
179
            if (udp_fd > 0) break;
180
            perror("socket");
181
        }
182 7a91333f Hans Zandbelt
    } else {
183 276358c1 Hans Zandbelt
        udp_fd = socket(s->dest_addr.ss_family, SOCK_DGRAM, 0);
184 115329f1 Diego Biurrun
        if (udp_fd < 0)
185 276358c1 Hans Zandbelt
            perror("socket");
186 7a91333f Hans Zandbelt
    }
187 276358c1 Hans Zandbelt
188
    if (udp_fd < 0)
189 7a91333f Hans Zandbelt
        goto fail;
190 115329f1 Diego Biurrun
191 7a91333f Hans Zandbelt
    if (s->local_port != 0) {
192
        if (bind(udp_fd, res0->ai_addr, res0->ai_addrlen) < 0) {
193
            perror("bind");
194
            goto fail;
195
        }
196 88730be6 Måns Rullgård
        freeaddrinfo(res0);
197
        res0 = NULL;
198 115329f1 Diego Biurrun
    }
199 7a91333f Hans Zandbelt
200
    addrlen = sizeof(clientaddr);
201
    if (getsockname(udp_fd, (struct sockaddr *)&clientaddr, &addrlen) < 0) {
202
        perror("getsockname");
203
        goto fail;
204
    }
205
206
    if (getnameinfo((struct sockaddr *)&clientaddr, addrlen, hbuf, sizeof(hbuf),  sbuf, sizeof(sbuf), NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
207
        perror("getnameinfo");
208
        goto fail;
209
    }
210
211
    s->local_port = strtol(sbuf, NULL, 10);
212 115329f1 Diego Biurrun
213 7a91333f Hans Zandbelt
    return udp_fd;
214 115329f1 Diego Biurrun
215 7a91333f Hans Zandbelt
 fail:
216
    if (udp_fd >= 0)
217
#ifdef CONFIG_BEOS_NETSERVER
218
        closesocket(udp_fd);
219
#else
220
        close(udp_fd);
221
#endif
222 88730be6 Måns Rullgård
    if(res0)
223
        freeaddrinfo(res0);
224 7a91333f Hans Zandbelt
    return -1;
225
}
226
227
#endif
228
229
230 2d225591 Fabrice Bellard
/**
231
 * If no filename is given to av_open_input_file because you want to
232
 * get the local port first, then you must call this function to set
233
 * the remote server address.
234
 *
235
 * url syntax: udp://host:port[?option=val...]
236 115329f1 Diego Biurrun
 * option: 'multicast=1' : enable multicast
237 2d225591 Fabrice Bellard
 *         'ttl=n'       : set the ttl value (for multicast only)
238
 *         'localport=n' : set the local port
239 9899efb4 Max Krasnyansky
 *         'pkt_size=n'  : set max packet size
240 34ecc397 Thijs
 *         'reuse=1'     : enable reusing the socket
241 2d225591 Fabrice Bellard
 *
242
 * @param s1 media file context
243
 * @param uri of the remote server
244
 * @return zero if no error.
245
 */
246
int udp_set_remote_url(URLContext *h, const char *uri)
247
{
248 7a91333f Hans Zandbelt
#ifdef CONFIG_IPV6
249
    return udp_ipv6_set_remote_url(h, uri);
250
#else
251 2d225591 Fabrice Bellard
    UDPContext *s = h->priv_data;
252
    char hostname[256];
253
    int port;
254 115329f1 Diego Biurrun
255 6ba5cbc6 Petr Doubek
    url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
256 de6d9b64 Fabrice Bellard
257 2d225591 Fabrice Bellard
    /* set the destination address */
258
    if (resolve_host(&s->dest_addr.sin_addr, hostname) < 0)
259 0bd586c5 Mike Melanson
        return AVERROR_IO;
260 2d225591 Fabrice Bellard
    s->dest_addr.sin_family = AF_INET;
261
    s->dest_addr.sin_port = htons(port);
262
    return 0;
263 7a91333f Hans Zandbelt
#endif
264 2d225591 Fabrice Bellard
}
265
266
/**
267
 * Return the local port used by the UDP connexion
268
 * @param s1 media file context
269
 * @return the local port number
270
 */
271
int udp_get_local_port(URLContext *h)
272
{
273
    UDPContext *s = h->priv_data;
274
    return s->local_port;
275
}
276
277
/**
278
 * Return the udp file handle for select() usage to wait for several RTP
279
 * streams at the same time.
280
 * @param h media file context
281
 */
282
int udp_get_file_handle(URLContext *h)
283
{
284
    UDPContext *s = h->priv_data;
285
    return s->udp_fd;
286
}
287
288
/* put it in UDP context */
289 de6d9b64 Fabrice Bellard
/* return non zero if error */
290
static int udp_open(URLContext *h, const char *uri, int flags)
291
{
292
    char hostname[1024];
293 2d225591 Fabrice Bellard
    int port, udp_fd = -1, tmp;
294
    UDPContext *s = NULL;
295 88730be6 Måns Rullgård
    int is_output;
296 2d225591 Fabrice Bellard
    const char *p;
297
    char buf[256];
298 88730be6 Måns Rullgård
#ifndef CONFIG_IPV6
299
    struct sockaddr_in my_addr, my_addr1;
300
    int len;
301
#endif
302 de6d9b64 Fabrice Bellard
303
    h->is_streamed = 1;
304 9899efb4 Max Krasnyansky
    h->max_packet_size = 1472;
305 de6d9b64 Fabrice Bellard
306 2d225591 Fabrice Bellard
    is_output = (flags & URL_WRONLY);
307 115329f1 Diego Biurrun
308 2d225591 Fabrice Bellard
    s = av_malloc(sizeof(UDPContext));
309
    if (!s)
310
        return -ENOMEM;
311
312
    h->priv_data = s;
313
    s->ttl = 16;
314
    s->is_multicast = 0;
315 cc74aafb Michael Niedermayer
    s->local_port = 0;
316 34ecc397 Thijs
    s->reuse_socket = 0;
317 2d225591 Fabrice Bellard
    p = strchr(uri, '?');
318
    if (p) {
319
        s->is_multicast = find_info_tag(buf, sizeof(buf), "multicast", p);
320 34ecc397 Thijs
        s->reuse_socket = find_info_tag(buf, sizeof(buf), "reuse", p);
321 2d225591 Fabrice Bellard
        if (find_info_tag(buf, sizeof(buf), "ttl", p)) {
322
            s->ttl = strtol(buf, NULL, 10);
323
        }
324
        if (find_info_tag(buf, sizeof(buf), "localport", p)) {
325
            s->local_port = strtol(buf, NULL, 10);
326
        }
327 9899efb4 Max Krasnyansky
        if (find_info_tag(buf, sizeof(buf), "pkt_size", p)) {
328
            h->max_packet_size = strtol(buf, NULL, 10);
329
        }
330 de6d9b64 Fabrice Bellard
    }
331 2d225591 Fabrice Bellard
332
    /* fill the dest addr */
333 6ba5cbc6 Petr Doubek
    url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
334 115329f1 Diego Biurrun
335 2d225591 Fabrice Bellard
    /* XXX: fix url_split */
336
    if (hostname[0] == '\0' || hostname[0] == '?') {
337
        /* only accepts null hostname if input */
338
        if (s->is_multicast || (flags & URL_WRONLY))
339
            goto fail;
340
    } else {
341
        udp_set_remote_url(h, uri);
342
    }
343 de6d9b64 Fabrice Bellard
344 7a91333f Hans Zandbelt
#ifndef CONFIG_IPV6
345 2d225591 Fabrice Bellard
    udp_fd = socket(PF_INET, SOCK_DGRAM, 0);
346
    if (udp_fd < 0)
347
        goto fail;
348
349 772956c5 Fabrice Bellard
    my_addr.sin_family = AF_INET;
350
    my_addr.sin_addr.s_addr = htonl (INADDR_ANY);
351 2d225591 Fabrice Bellard
    if (s->is_multicast && !(h->flags & URL_WRONLY)) {
352 772956c5 Fabrice Bellard
        /* special case: the bind must be done on the multicast address port */
353
        my_addr.sin_port = s->dest_addr.sin_port;
354 2d225591 Fabrice Bellard
    } else {
355
        my_addr.sin_port = htons(s->local_port);
356
    }
357 de6d9b64 Fabrice Bellard
358 34ecc397 Thijs
    if (s->reuse_socket)
359
        if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0)
360
            goto fail;
361
362 de6d9b64 Fabrice Bellard
    /* the bind is needed to give a port to the socket now */
363 115329f1 Diego Biurrun
    if (bind(udp_fd,(struct sockaddr *)&my_addr, sizeof(my_addr)) < 0)
364 de6d9b64 Fabrice Bellard
        goto fail;
365
366 2d225591 Fabrice Bellard
    len = sizeof(my_addr1);
367
    getsockname(udp_fd, (struct sockaddr *)&my_addr1, &len);
368
    s->local_port = ntohs(my_addr1.sin_port);
369 de6d9b64 Fabrice Bellard
370 9ddd71fc François Revol
#ifndef CONFIG_BEOS_NETSERVER
371 2d225591 Fabrice Bellard
    if (s->is_multicast) {
372
        if (h->flags & URL_WRONLY) {
373
            /* output */
374 115329f1 Diego Biurrun
            if (setsockopt(udp_fd, IPPROTO_IP, IP_MULTICAST_TTL,
375 2d225591 Fabrice Bellard
                           &s->ttl, sizeof(s->ttl)) < 0) {
376
                perror("IP_MULTICAST_TTL");
377
                goto fail;
378
            }
379
        } else {
380
            /* input */
381
            memset(&s->mreq, 0, sizeof(s->mreq));
382
            s->mreq.imr_multiaddr = s->dest_addr.sin_addr;
383
            s->mreq.imr_interface.s_addr = htonl (INADDR_ANY);
384 115329f1 Diego Biurrun
            if (setsockopt(udp_fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
385 2d225591 Fabrice Bellard
                           &s->mreq, sizeof(s->mreq)) < 0) {
386
                perror("rtp: IP_ADD_MEMBERSHIP");
387
                goto fail;
388
            }
389
        }
390 de6d9b64 Fabrice Bellard
    }
391 9ddd71fc François Revol
#endif
392 7a91333f Hans Zandbelt
#else
393
    if (s->is_multicast && !(h->flags & URL_WRONLY))
394
        s->local_port = port;
395
    udp_fd = udp_ipv6_set_local(h);
396
    if (udp_fd < 0)
397
        goto fail;
398
#ifndef CONFIG_BEOS_NETSERVER
399
    if (s->is_multicast) {
400
        if (h->flags & URL_WRONLY) {
401
            if (udp_ipv6_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0)
402
                goto fail;
403
        } else {
404
            if (udp_ipv6_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr) < 0)
405
                goto fail;
406
        }
407
    }
408 115329f1 Diego Biurrun
#endif
409 7a91333f Hans Zandbelt
#endif
410 de6d9b64 Fabrice Bellard
411 2d225591 Fabrice Bellard
    if (is_output) {
412
        /* limit the tx buf size to limit latency */
413
        tmp = UDP_TX_BUF_SIZE;
414
        if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) {
415
            perror("setsockopt sndbuf");
416
            goto fail;
417
        }
418
    }
419
420
    s->udp_fd = udp_fd;
421 de6d9b64 Fabrice Bellard
    return 0;
422
 fail:
423 2d225591 Fabrice Bellard
    if (udp_fd >= 0)
424 9ddd71fc François Revol
#ifdef CONFIG_BEOS_NETSERVER
425
        closesocket(udp_fd);
426
#else
427 2d225591 Fabrice Bellard
        close(udp_fd);
428 9ddd71fc François Revol
#endif
429 2d225591 Fabrice Bellard
    av_free(s);
430 0bd586c5 Mike Melanson
    return AVERROR_IO;
431 de6d9b64 Fabrice Bellard
}
432
433 0c1a9eda Zdenek Kabelac
static int udp_read(URLContext *h, uint8_t *buf, int size)
434 de6d9b64 Fabrice Bellard
{
435
    UDPContext *s = h->priv_data;
436 7a91333f Hans Zandbelt
#ifndef CONFIG_IPV6
437 2d225591 Fabrice Bellard
    struct sockaddr_in from;
438 7a91333f Hans Zandbelt
#else
439
    struct sockaddr_storage from;
440
#endif
441 191e8ca7 Måns Rullgård
    socklen_t from_len;
442
    int len;
443 2d225591 Fabrice Bellard
444
    for(;;) {
445
        from_len = sizeof(from);
446
        len = recvfrom (s->udp_fd, buf, size, 0,
447
                        (struct sockaddr *)&from, &from_len);
448
        if (len < 0) {
449
            if (errno != EAGAIN && errno != EINTR)
450 0bd586c5 Mike Melanson
                return AVERROR_IO;
451 2d225591 Fabrice Bellard
        } else {
452
            break;
453
        }
454
    }
455
    return len;
456 de6d9b64 Fabrice Bellard
}
457
458 0c1a9eda Zdenek Kabelac
static int udp_write(URLContext *h, uint8_t *buf, int size)
459 de6d9b64 Fabrice Bellard
{
460
    UDPContext *s = h->priv_data;
461 2d225591 Fabrice Bellard
    int ret;
462
463
    for(;;) {
464 115329f1 Diego Biurrun
        ret = sendto (s->udp_fd, buf, size, 0,
465 2d225591 Fabrice Bellard
                      (struct sockaddr *) &s->dest_addr,
466 7a91333f Hans Zandbelt
#ifndef CONFIG_IPV6
467 2d225591 Fabrice Bellard
                      sizeof (s->dest_addr));
468 7a91333f Hans Zandbelt
#else
469
                      s->dest_addr_len);
470
#endif
471 2d225591 Fabrice Bellard
        if (ret < 0) {
472
            if (errno != EINTR && errno != EAGAIN)
473 0bd586c5 Mike Melanson
                return AVERROR_IO;
474 2d225591 Fabrice Bellard
        } else {
475
            break;
476
        }
477 de6d9b64 Fabrice Bellard
    }
478 2d225591 Fabrice Bellard
    return size;
479
}
480
481
static int udp_close(URLContext *h)
482
{
483
    UDPContext *s = h->priv_data;
484
485 9ddd71fc François Revol
#ifndef CONFIG_BEOS_NETSERVER
486 7a91333f Hans Zandbelt
#ifndef CONFIG_IPV6
487 2d225591 Fabrice Bellard
    if (s->is_multicast && !(h->flags & URL_WRONLY)) {
488 115329f1 Diego Biurrun
        if (setsockopt(s->udp_fd, IPPROTO_IP, IP_DROP_MEMBERSHIP,
489 2d225591 Fabrice Bellard
                       &s->mreq, sizeof(s->mreq)) < 0) {
490
            perror("IP_DROP_MEMBERSHIP");
491
        }
492
    }
493 7a91333f Hans Zandbelt
#else
494
    if (s->is_multicast && !(h->flags & URL_WRONLY))
495
        udp_ipv6_leave_multicast_group(s->udp_fd, (struct sockaddr *)&s->dest_addr);
496
#endif
497 2d225591 Fabrice Bellard
    close(s->udp_fd);
498 9ddd71fc François Revol
#else
499
    closesocket(s->udp_fd);
500
#endif
501 2d225591 Fabrice Bellard
    av_free(s);
502
    return 0;
503 de6d9b64 Fabrice Bellard
}
504
505
URLProtocol udp_protocol = {
506
    "udp",
507
    udp_open,
508 2d225591 Fabrice Bellard
    udp_read,
509 de6d9b64 Fabrice Bellard
    udp_write,
510
    NULL, /* seek */
511
    udp_close,
512
};