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ffmpeg / libavformat / udp.c @ 47772399

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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 42572ef5 Ramiro Polla
#include "network.h"
24 de6d9b64 Fabrice Bellard
25 9c633e9a Alex Beregszaszi
#ifndef IPV6_ADD_MEMBERSHIP
26
#define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
27
#define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP
28
#endif
29
30 de6d9b64 Fabrice Bellard
typedef struct {
31 2d225591 Fabrice Bellard
    int udp_fd;
32
    int ttl;
33
    int is_multicast;
34
    int local_port;
35 34ecc397 Thijs
    int reuse_socket;
36 7a91333f Hans Zandbelt
#ifndef CONFIG_IPV6
37 2d225591 Fabrice Bellard
    struct ip_mreq mreq;
38
    struct sockaddr_in dest_addr;
39 7a91333f Hans Zandbelt
#else
40
    struct sockaddr_storage dest_addr;
41
    size_t dest_addr_len;
42
#endif
43 de6d9b64 Fabrice Bellard
} UDPContext;
44
45
#define UDP_TX_BUF_SIZE 32768
46
47 7a91333f Hans Zandbelt
#ifdef CONFIG_IPV6
48
49 7b49ce2e Stefan Huehner
static int udp_ipv6_set_multicast_ttl(int sockfd, int mcastTTL, struct sockaddr *addr) {
50 7a91333f Hans Zandbelt
    if (addr->sa_family == AF_INET) {
51
        if (setsockopt(sockfd, IPPROTO_IP, IP_MULTICAST_TTL, &mcastTTL, sizeof(mcastTTL)) < 0) {
52
            perror("setsockopt(IP_MULTICAST_TTL)");
53
            return -1;
54
        }
55
    }
56
    if (addr->sa_family == AF_INET6) {
57
        if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &mcastTTL, sizeof(mcastTTL)) < 0) {
58
            perror("setsockopt(IPV6_MULTICAST_HOPS)");
59
            return -1;
60
        }
61
    }
62
    return 0;
63
}
64
65 7b49ce2e Stefan Huehner
static int udp_ipv6_join_multicast_group(int sockfd, struct sockaddr *addr) {
66 7a91333f Hans Zandbelt
    struct ip_mreq   mreq;
67 115329f1 Diego Biurrun
    struct ipv6_mreq mreq6;
68 7a91333f Hans Zandbelt
    if (addr->sa_family == AF_INET) {
69
        mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
70
        mreq.imr_interface.s_addr= INADDR_ANY;
71
        if (setsockopt(sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
72
            perror("setsockopt(IP_ADD_MEMBERSHIP)");
73
            return -1;
74
        }
75
    }
76
    if (addr->sa_family == AF_INET6) {
77
        memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
78
        mreq6.ipv6mr_interface= 0;
79
        if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
80
            perror("setsockopt(IPV6_ADD_MEMBERSHIP)");
81
            return -1;
82
        }
83
    }
84
    return 0;
85
}
86
87 7b49ce2e Stefan Huehner
static int udp_ipv6_leave_multicast_group(int sockfd, struct sockaddr *addr) {
88 7a91333f Hans Zandbelt
    struct ip_mreq   mreq;
89 115329f1 Diego Biurrun
    struct ipv6_mreq mreq6;
90 7a91333f Hans Zandbelt
    if (addr->sa_family == AF_INET) {
91
        mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
92
        mreq.imr_interface.s_addr= INADDR_ANY;
93
        if (setsockopt(sockfd, IPPROTO_IP, IP_DROP_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
94
            perror("setsockopt(IP_DROP_MEMBERSHIP)");
95
            return -1;
96
        }
97
    }
98
    if (addr->sa_family == AF_INET6) {
99
        memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
100
        mreq6.ipv6mr_interface= 0;
101
        if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
102
            perror("setsockopt(IPV6_DROP_MEMBERSHIP)");
103
            return -1;
104
        }
105
    }
106
    return 0;
107
}
108
109 7b49ce2e Stefan Huehner
static struct addrinfo* udp_ipv6_resolve_host(const char *hostname, int port, int type, int family, int flags) {
110 7a91333f Hans Zandbelt
    struct addrinfo hints, *res = 0;
111
    int error;
112
    char sport[16];
113
    const char *node = 0, *service = 0;
114
115
    if (port > 0) {
116 2fc8ea24 Michael Niedermayer
        snprintf(sport, sizeof(sport), "%d", port);
117 7a91333f Hans Zandbelt
        service = sport;
118
    }
119
    if ((hostname) && (hostname[0] != '\0') && (hostname[0] != '?')) {
120
        node = hostname;
121
    }
122
    if ((node) || (service)) {
123
        memset(&hints, 0, sizeof(hints));
124
        hints.ai_socktype = type;
125
        hints.ai_family   = family;
126 115329f1 Diego Biurrun
        hints.ai_flags = flags;
127 7a91333f Hans Zandbelt
        if ((error = getaddrinfo(node, service, &hints, &res))) {
128 58379c06 Benjamin Larsson
            av_log(NULL, AV_LOG_ERROR, "udp_ipv6_resolve_host: %s\n", gai_strerror(error));
129 7a91333f Hans Zandbelt
        }
130
    }
131
    return res;
132
}
133
134 7b49ce2e Stefan Huehner
static int udp_ipv6_set_remote_url(URLContext *h, const char *uri) {
135 7a91333f Hans Zandbelt
    UDPContext *s = h->priv_data;
136
    char hostname[256];
137
    int port;
138
    struct addrinfo *res0;
139
    url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
140
    res0 = udp_ipv6_resolve_host(hostname, port, SOCK_DGRAM, AF_UNSPEC, 0);
141 6f3e0b21 Panagiotis Issaris
    if (res0 == 0) return AVERROR(EIO);
142 7a91333f Hans Zandbelt
    memcpy(&s->dest_addr, res0->ai_addr, res0->ai_addrlen);
143
    s->dest_addr_len = res0->ai_addrlen;
144
    freeaddrinfo(res0);
145
    return 0;
146
}
147
148 7b49ce2e Stefan Huehner
static int udp_ipv6_set_local(URLContext *h) {
149 7a91333f Hans Zandbelt
    UDPContext *s = h->priv_data;
150
    int udp_fd = -1;
151
    struct sockaddr_storage clientaddr;
152
    socklen_t addrlen;
153
    char sbuf[NI_MAXSERV];
154
    char hbuf[NI_MAXHOST];
155 276358c1 Hans Zandbelt
    struct addrinfo *res0 = NULL, *res = NULL;
156 115329f1 Diego Biurrun
157
    if (s->local_port != 0) {
158 7a91333f Hans Zandbelt
        res0 = udp_ipv6_resolve_host(0, s->local_port, SOCK_DGRAM, AF_UNSPEC, AI_PASSIVE);
159 88730be6 Måns Rullgård
        if (res0 == 0)
160
            goto fail;
161 115329f1 Diego Biurrun
        for (res = res0; res; res=res->ai_next) {
162 276358c1 Hans Zandbelt
            udp_fd = socket(res->ai_family, SOCK_DGRAM, 0);
163
            if (udp_fd > 0) break;
164
            perror("socket");
165
        }
166 7a91333f Hans Zandbelt
    } else {
167 276358c1 Hans Zandbelt
        udp_fd = socket(s->dest_addr.ss_family, SOCK_DGRAM, 0);
168 115329f1 Diego Biurrun
        if (udp_fd < 0)
169 276358c1 Hans Zandbelt
            perror("socket");
170 7a91333f Hans Zandbelt
    }
171 276358c1 Hans Zandbelt
172
    if (udp_fd < 0)
173 7a91333f Hans Zandbelt
        goto fail;
174 115329f1 Diego Biurrun
175 7a91333f Hans Zandbelt
    if (s->local_port != 0) {
176
        if (bind(udp_fd, res0->ai_addr, res0->ai_addrlen) < 0) {
177
            perror("bind");
178
            goto fail;
179
        }
180 88730be6 Måns Rullgård
        freeaddrinfo(res0);
181
        res0 = NULL;
182 115329f1 Diego Biurrun
    }
183 7a91333f Hans Zandbelt
184
    addrlen = sizeof(clientaddr);
185
    if (getsockname(udp_fd, (struct sockaddr *)&clientaddr, &addrlen) < 0) {
186
        perror("getsockname");
187
        goto fail;
188
    }
189
190
    if (getnameinfo((struct sockaddr *)&clientaddr, addrlen, hbuf, sizeof(hbuf),  sbuf, sizeof(sbuf), NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
191
        perror("getnameinfo");
192
        goto fail;
193
    }
194
195
    s->local_port = strtol(sbuf, NULL, 10);
196 115329f1 Diego Biurrun
197 7a91333f Hans Zandbelt
    return udp_fd;
198 115329f1 Diego Biurrun
199 7a91333f Hans Zandbelt
 fail:
200
    if (udp_fd >= 0)
201
        closesocket(udp_fd);
202 88730be6 Måns Rullgård
    if(res0)
203
        freeaddrinfo(res0);
204 7a91333f Hans Zandbelt
    return -1;
205
}
206
207 0a4f20c6 Diego Biurrun
#endif /* CONFIG_IPV6 */
208 7a91333f Hans Zandbelt
209
210 2d225591 Fabrice Bellard
/**
211
 * If no filename is given to av_open_input_file because you want to
212
 * get the local port first, then you must call this function to set
213
 * the remote server address.
214
 *
215
 * url syntax: udp://host:port[?option=val...]
216 115329f1 Diego Biurrun
 * option: 'multicast=1' : enable multicast
217 2d225591 Fabrice Bellard
 *         'ttl=n'       : set the ttl value (for multicast only)
218
 *         'localport=n' : set the local port
219 9899efb4 Max Krasnyansky
 *         'pkt_size=n'  : set max packet size
220 34ecc397 Thijs
 *         'reuse=1'     : enable reusing the socket
221 2d225591 Fabrice Bellard
 *
222
 * @param s1 media file context
223
 * @param uri of the remote server
224
 * @return zero if no error.
225
 */
226
int udp_set_remote_url(URLContext *h, const char *uri)
227
{
228 7a91333f Hans Zandbelt
#ifdef CONFIG_IPV6
229
    return udp_ipv6_set_remote_url(h, uri);
230
#else
231 2d225591 Fabrice Bellard
    UDPContext *s = h->priv_data;
232
    char hostname[256];
233
    int port;
234 115329f1 Diego Biurrun
235 6ba5cbc6 Petr Doubek
    url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
236 de6d9b64 Fabrice Bellard
237 2d225591 Fabrice Bellard
    /* set the destination address */
238
    if (resolve_host(&s->dest_addr.sin_addr, hostname) < 0)
239 6f3e0b21 Panagiotis Issaris
        return AVERROR(EIO);
240 2d225591 Fabrice Bellard
    s->dest_addr.sin_family = AF_INET;
241
    s->dest_addr.sin_port = htons(port);
242
    return 0;
243 7a91333f Hans Zandbelt
#endif
244 2d225591 Fabrice Bellard
}
245
246
/**
247
 * Return the local port used by the UDP connexion
248
 * @param s1 media file context
249
 * @return the local port number
250
 */
251
int udp_get_local_port(URLContext *h)
252
{
253
    UDPContext *s = h->priv_data;
254
    return s->local_port;
255
}
256
257
/**
258
 * Return the udp file handle for select() usage to wait for several RTP
259
 * streams at the same time.
260
 * @param h media file context
261
 */
262
int udp_get_file_handle(URLContext *h)
263
{
264
    UDPContext *s = h->priv_data;
265
    return s->udp_fd;
266
}
267
268
/* put it in UDP context */
269 de6d9b64 Fabrice Bellard
/* return non zero if error */
270
static int udp_open(URLContext *h, const char *uri, int flags)
271
{
272
    char hostname[1024];
273 2d225591 Fabrice Bellard
    int port, udp_fd = -1, tmp;
274
    UDPContext *s = NULL;
275 88730be6 Måns Rullgård
    int is_output;
276 2d225591 Fabrice Bellard
    const char *p;
277
    char buf[256];
278 88730be6 Måns Rullgård
#ifndef CONFIG_IPV6
279
    struct sockaddr_in my_addr, my_addr1;
280
    int len;
281
#endif
282 de6d9b64 Fabrice Bellard
283
    h->is_streamed = 1;
284 9899efb4 Max Krasnyansky
    h->max_packet_size = 1472;
285 de6d9b64 Fabrice Bellard
286 2d225591 Fabrice Bellard
    is_output = (flags & URL_WRONLY);
287 115329f1 Diego Biurrun
288 2d225591 Fabrice Bellard
    s = av_malloc(sizeof(UDPContext));
289
    if (!s)
290 8fa36ae0 François Revol
        return AVERROR(ENOMEM);
291 2d225591 Fabrice Bellard
292
    h->priv_data = s;
293
    s->ttl = 16;
294
    s->is_multicast = 0;
295 cc74aafb Michael Niedermayer
    s->local_port = 0;
296 34ecc397 Thijs
    s->reuse_socket = 0;
297 2d225591 Fabrice Bellard
    p = strchr(uri, '?');
298
    if (p) {
299
        s->is_multicast = find_info_tag(buf, sizeof(buf), "multicast", p);
300 34ecc397 Thijs
        s->reuse_socket = find_info_tag(buf, sizeof(buf), "reuse", p);
301 2d225591 Fabrice Bellard
        if (find_info_tag(buf, sizeof(buf), "ttl", p)) {
302
            s->ttl = strtol(buf, NULL, 10);
303
        }
304
        if (find_info_tag(buf, sizeof(buf), "localport", p)) {
305
            s->local_port = strtol(buf, NULL, 10);
306
        }
307 9899efb4 Max Krasnyansky
        if (find_info_tag(buf, sizeof(buf), "pkt_size", p)) {
308
            h->max_packet_size = strtol(buf, NULL, 10);
309
        }
310 de6d9b64 Fabrice Bellard
    }
311 2d225591 Fabrice Bellard
312
    /* fill the dest addr */
313 6ba5cbc6 Petr Doubek
    url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
314 115329f1 Diego Biurrun
315 2d225591 Fabrice Bellard
    /* XXX: fix url_split */
316
    if (hostname[0] == '\0' || hostname[0] == '?') {
317
        /* only accepts null hostname if input */
318
        if (s->is_multicast || (flags & URL_WRONLY))
319
            goto fail;
320
    } else {
321
        udp_set_remote_url(h, uri);
322
    }
323 de6d9b64 Fabrice Bellard
324 7a91333f Hans Zandbelt
#ifndef CONFIG_IPV6
325 b5cccea0 Alex Beregszaszi
    udp_fd = socket(AF_INET, SOCK_DGRAM, 0);
326 2d225591 Fabrice Bellard
    if (udp_fd < 0)
327
        goto fail;
328
329 772956c5 Fabrice Bellard
    my_addr.sin_family = AF_INET;
330
    my_addr.sin_addr.s_addr = htonl (INADDR_ANY);
331 2d225591 Fabrice Bellard
    if (s->is_multicast && !(h->flags & URL_WRONLY)) {
332 772956c5 Fabrice Bellard
        /* special case: the bind must be done on the multicast address port */
333
        my_addr.sin_port = s->dest_addr.sin_port;
334 2d225591 Fabrice Bellard
    } else {
335
        my_addr.sin_port = htons(s->local_port);
336
    }
337 de6d9b64 Fabrice Bellard
338 34ecc397 Thijs
    if (s->reuse_socket)
339
        if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0)
340
            goto fail;
341
342 de6d9b64 Fabrice Bellard
    /* the bind is needed to give a port to the socket now */
343 115329f1 Diego Biurrun
    if (bind(udp_fd,(struct sockaddr *)&my_addr, sizeof(my_addr)) < 0)
344 de6d9b64 Fabrice Bellard
        goto fail;
345
346 2d225591 Fabrice Bellard
    len = sizeof(my_addr1);
347
    getsockname(udp_fd, (struct sockaddr *)&my_addr1, &len);
348
    s->local_port = ntohs(my_addr1.sin_port);
349 de6d9b64 Fabrice Bellard
350 c9c1a8e7 François Revol
#ifdef IP_MULTICAST_TTL
351 2d225591 Fabrice Bellard
    if (s->is_multicast) {
352
        if (h->flags & URL_WRONLY) {
353
            /* output */
354 115329f1 Diego Biurrun
            if (setsockopt(udp_fd, IPPROTO_IP, IP_MULTICAST_TTL,
355 2d225591 Fabrice Bellard
                           &s->ttl, sizeof(s->ttl)) < 0) {
356
                perror("IP_MULTICAST_TTL");
357
                goto fail;
358
            }
359
        } else {
360
            /* input */
361
            memset(&s->mreq, 0, sizeof(s->mreq));
362
            s->mreq.imr_multiaddr = s->dest_addr.sin_addr;
363
            s->mreq.imr_interface.s_addr = htonl (INADDR_ANY);
364 115329f1 Diego Biurrun
            if (setsockopt(udp_fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
365 2d225591 Fabrice Bellard
                           &s->mreq, sizeof(s->mreq)) < 0) {
366
                perror("rtp: IP_ADD_MEMBERSHIP");
367
                goto fail;
368
            }
369
        }
370 de6d9b64 Fabrice Bellard
    }
371 9ddd71fc François Revol
#endif
372 7a91333f Hans Zandbelt
#else
373
    if (s->is_multicast && !(h->flags & URL_WRONLY))
374
        s->local_port = port;
375
    udp_fd = udp_ipv6_set_local(h);
376
    if (udp_fd < 0)
377
        goto fail;
378
    if (s->is_multicast) {
379
        if (h->flags & URL_WRONLY) {
380
            if (udp_ipv6_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0)
381
                goto fail;
382
        } else {
383
            if (udp_ipv6_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr) < 0)
384
                goto fail;
385
        }
386
    }
387 0a4f20c6 Diego Biurrun
#endif /* CONFIG_IPV6 */
388 de6d9b64 Fabrice Bellard
389 2d225591 Fabrice Bellard
    if (is_output) {
390
        /* limit the tx buf size to limit latency */
391
        tmp = UDP_TX_BUF_SIZE;
392
        if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) {
393
            perror("setsockopt sndbuf");
394
            goto fail;
395
        }
396
    }
397
398
    s->udp_fd = udp_fd;
399 de6d9b64 Fabrice Bellard
    return 0;
400
 fail:
401 2d225591 Fabrice Bellard
    if (udp_fd >= 0)
402 9ddd71fc François Revol
        closesocket(udp_fd);
403 2d225591 Fabrice Bellard
    av_free(s);
404 6f3e0b21 Panagiotis Issaris
    return AVERROR(EIO);
405 de6d9b64 Fabrice Bellard
}
406
407 0c1a9eda Zdenek Kabelac
static int udp_read(URLContext *h, uint8_t *buf, int size)
408 de6d9b64 Fabrice Bellard
{
409
    UDPContext *s = h->priv_data;
410 7a91333f Hans Zandbelt
#ifndef CONFIG_IPV6
411 2d225591 Fabrice Bellard
    struct sockaddr_in from;
412 7a91333f Hans Zandbelt
#else
413
    struct sockaddr_storage from;
414
#endif
415 191e8ca7 Måns Rullgård
    socklen_t from_len;
416
    int len;
417 2d225591 Fabrice Bellard
418
    for(;;) {
419
        from_len = sizeof(from);
420
        len = recvfrom (s->udp_fd, buf, size, 0,
421
                        (struct sockaddr *)&from, &from_len);
422
        if (len < 0) {
423 8da4034f Alex Beregszaszi
            if (ff_neterrno() != FF_NETERROR(EAGAIN) &&
424
                ff_neterrno() != FF_NETERROR(EINTR))
425 6f3e0b21 Panagiotis Issaris
                return AVERROR(EIO);
426 2d225591 Fabrice Bellard
        } else {
427
            break;
428
        }
429
    }
430
    return len;
431 de6d9b64 Fabrice Bellard
}
432
433 0c1a9eda Zdenek Kabelac
static int udp_write(URLContext *h, uint8_t *buf, int size)
434 de6d9b64 Fabrice Bellard
{
435
    UDPContext *s = h->priv_data;
436 2d225591 Fabrice Bellard
    int ret;
437
438
    for(;;) {
439 115329f1 Diego Biurrun
        ret = sendto (s->udp_fd, buf, size, 0,
440 2d225591 Fabrice Bellard
                      (struct sockaddr *) &s->dest_addr,
441 7a91333f Hans Zandbelt
#ifndef CONFIG_IPV6
442 2d225591 Fabrice Bellard
                      sizeof (s->dest_addr));
443 7a91333f Hans Zandbelt
#else
444
                      s->dest_addr_len);
445
#endif
446 2d225591 Fabrice Bellard
        if (ret < 0) {
447 8da4034f Alex Beregszaszi
            if (ff_neterrno() != FF_NETERROR(EINTR) &&
448
                ff_neterrno() != FF_NETERROR(EAGAIN))
449 6f3e0b21 Panagiotis Issaris
                return AVERROR(EIO);
450 2d225591 Fabrice Bellard
        } else {
451
            break;
452
        }
453 de6d9b64 Fabrice Bellard
    }
454 2d225591 Fabrice Bellard
    return size;
455
}
456
457
static int udp_close(URLContext *h)
458
{
459
    UDPContext *s = h->priv_data;
460
461 7a91333f Hans Zandbelt
#ifndef CONFIG_IPV6
462 e9d511dc François Revol
#ifdef IP_DROP_MEMBERSHIP
463 2d225591 Fabrice Bellard
    if (s->is_multicast && !(h->flags & URL_WRONLY)) {
464 115329f1 Diego Biurrun
        if (setsockopt(s->udp_fd, IPPROTO_IP, IP_DROP_MEMBERSHIP,
465 2d225591 Fabrice Bellard
                       &s->mreq, sizeof(s->mreq)) < 0) {
466
            perror("IP_DROP_MEMBERSHIP");
467
        }
468
    }
469 e9d511dc François Revol
#endif
470 7a91333f Hans Zandbelt
#else
471
    if (s->is_multicast && !(h->flags & URL_WRONLY))
472
        udp_ipv6_leave_multicast_group(s->udp_fd, (struct sockaddr *)&s->dest_addr);
473
#endif
474 9ddd71fc François Revol
    closesocket(s->udp_fd);
475 2d225591 Fabrice Bellard
    av_free(s);
476
    return 0;
477 de6d9b64 Fabrice Bellard
}
478
479
URLProtocol udp_protocol = {
480
    "udp",
481
    udp_open,
482 2d225591 Fabrice Bellard
    udp_read,
483 de6d9b64 Fabrice Bellard
    udp_write,
484
    NULL, /* seek */
485
    udp_close,
486
};