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e83d0967 RK |
1 | /* |
2 | * This file is part of DisOrder. | |
3 | * Copyright (C) 2007 Richard Kettlewell | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
18 | * USA | |
19 | */ | |
28bacdc0 RK |
20 | /** @file clients/playrtp.c |
21 | * @brief RTP player | |
22 | * | |
b0fdc63d | 23 | * This player supports Linux (<a href="http://www.alsa-project.org/">ALSA</a>) |
24 | * and Apple Mac (<a | |
25 | * href="http://developer.apple.com/audio/coreaudio.html">Core Audio</a>) | |
26 | * systems. There is no support for Microsoft Windows yet, and that will in | |
27 | * fact probably an entirely separate program. | |
28 | * | |
189e9830 RK |
29 | * The program runs (at least) three threads. listen_thread() is responsible |
30 | * for reading RTP packets off the wire and adding them to the linked list @ref | |
31 | * received_packets, assuming they are basically sound. queue_thread() takes | |
32 | * packets off this linked list and adds them to @ref packets (an operation | |
33 | * which might be much slower due to contention for @ref lock). | |
b0fdc63d | 34 | * |
35 | * The main thread is responsible for actually playing audio. In ALSA this | |
36 | * means it waits until ALSA says it's ready for more audio which it then | |
c593cf7c | 37 | * plays. See @ref clients/playrtp-alsa.c. |
b0fdc63d | 38 | * |
8e3fe3d8 | 39 | * In Core Audio the main thread is only responsible for starting and stopping |
b0fdc63d | 40 | * play: the system does the actual playback in its own private thread, and |
c593cf7c | 41 | * calls adioproc() to fetch the audio data. See @ref |
42 | * clients/playrtp-coreaudio.c. | |
b0fdc63d | 43 | * |
44 | * Sometimes it happens that there is no audio available to play. This may | |
45 | * because the server went away, or a packet was dropped, or the server | |
46 | * deliberately did not send any sound because it encountered a silence. | |
189e9830 RK |
47 | * |
48 | * Assumptions: | |
49 | * - it is safe to read uint32_t values without a lock protecting them | |
28bacdc0 | 50 | */ |
e83d0967 RK |
51 | |
52 | #include <config.h> | |
53 | #include "types.h" | |
54 | ||
55 | #include <getopt.h> | |
56 | #include <stdio.h> | |
57 | #include <stdlib.h> | |
58 | #include <sys/socket.h> | |
59 | #include <sys/types.h> | |
60 | #include <sys/socket.h> | |
61 | #include <netdb.h> | |
62 | #include <pthread.h> | |
0b75463f | 63 | #include <locale.h> |
2c7c9eae | 64 | #include <sys/uio.h> |
28bacdc0 | 65 | #include <string.h> |
8e3fe3d8 | 66 | #include <assert.h> |
c593cf7c | 67 | #include <errno.h> |
e83d0967 RK |
68 | |
69 | #include "log.h" | |
70 | #include "mem.h" | |
71 | #include "configuration.h" | |
72 | #include "addr.h" | |
73 | #include "syscalls.h" | |
74 | #include "rtp.h" | |
0b75463f | 75 | #include "defs.h" |
28bacdc0 RK |
76 | #include "vector.h" |
77 | #include "heap.h" | |
189e9830 | 78 | #include "timeval.h" |
8e3fe3d8 | 79 | #include "playrtp.h" |
e83d0967 | 80 | |
1153fd23 | 81 | #define readahead linux_headers_are_borked |
82 | ||
0b75463f | 83 | /** @brief RTP socket */ |
e83d0967 RK |
84 | static int rtpfd; |
85 | ||
345ebe66 RK |
86 | /** @brief Log output */ |
87 | static FILE *logfp; | |
88 | ||
0b75463f | 89 | /** @brief Output device */ |
8e3fe3d8 | 90 | const char *device; |
0b75463f | 91 | |
9086a105 | 92 | /** @brief Minimum low watermark |
0b75463f | 93 | * |
94 | * We'll stop playing if there's only this many samples in the buffer. */ | |
c593cf7c | 95 | unsigned minbuffer = 2 * 44100 / 10; /* 0.2 seconds */ |
0b75463f | 96 | |
9086a105 | 97 | /** @brief Buffer high watermark |
1153fd23 | 98 | * |
99 | * We'll only start playing when this many samples are available. */ | |
8d0c14d7 | 100 | static unsigned readahead = 2 * 2 * 44100; |
0b75463f | 101 | |
9086a105 RK |
102 | /** @brief Maximum buffer size |
103 | * | |
104 | * We'll stop reading from the network if we have this many samples. */ | |
105 | static unsigned maxbuffer; | |
106 | ||
189e9830 RK |
107 | /** @brief Received packets |
108 | * Protected by @ref receive_lock | |
109 | * | |
110 | * Received packets are added to this list, and queue_thread() picks them off | |
111 | * it and adds them to @ref packets. Whenever a packet is added to it, @ref | |
112 | * receive_cond is signalled. | |
113 | */ | |
8e3fe3d8 | 114 | struct packet *received_packets; |
189e9830 RK |
115 | |
116 | /** @brief Tail of @ref received_packets | |
117 | * Protected by @ref receive_lock | |
118 | */ | |
8e3fe3d8 | 119 | struct packet **received_tail = &received_packets; |
189e9830 RK |
120 | |
121 | /** @brief Lock protecting @ref received_packets | |
122 | * | |
123 | * Only listen_thread() and queue_thread() ever hold this lock. It is vital | |
124 | * that queue_thread() not hold it any longer than it strictly has to. */ | |
8e3fe3d8 | 125 | pthread_mutex_t receive_lock = PTHREAD_MUTEX_INITIALIZER; |
189e9830 RK |
126 | |
127 | /** @brief Condition variable signalled when @ref received_packets is updated | |
128 | * | |
129 | * Used by listen_thread() to notify queue_thread() that it has added another | |
130 | * packet to @ref received_packets. */ | |
8e3fe3d8 | 131 | pthread_cond_t receive_cond = PTHREAD_COND_INITIALIZER; |
189e9830 RK |
132 | |
133 | /** @brief Length of @ref received_packets */ | |
8e3fe3d8 | 134 | uint32_t nreceived; |
28bacdc0 RK |
135 | |
136 | /** @brief Binary heap of received packets */ | |
8e3fe3d8 | 137 | struct pheap packets; |
28bacdc0 | 138 | |
189e9830 RK |
139 | /** @brief Total number of samples available |
140 | * | |
141 | * We make this volatile because we inspect it without a protecting lock, | |
142 | * so the usual pthread_* guarantees aren't available. | |
143 | */ | |
8e3fe3d8 | 144 | volatile uint32_t nsamples; |
0b75463f | 145 | |
146 | /** @brief Timestamp of next packet to play. | |
147 | * | |
148 | * This is set to the timestamp of the last packet, plus the number of | |
09ee2f0d | 149 | * samples it contained. Only valid if @ref active is nonzero. |
0b75463f | 150 | */ |
8e3fe3d8 | 151 | uint32_t next_timestamp; |
e83d0967 | 152 | |
09ee2f0d | 153 | /** @brief True if actively playing |
154 | * | |
155 | * This is true when playing and false when just buffering. */ | |
8e3fe3d8 | 156 | int active; |
09ee2f0d | 157 | |
189e9830 | 158 | /** @brief Lock protecting @ref packets */ |
8e3fe3d8 | 159 | pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER; |
189e9830 RK |
160 | |
161 | /** @brief Condition variable signalled whenever @ref packets is changed */ | |
8e3fe3d8 | 162 | pthread_cond_t cond = PTHREAD_COND_INITIALIZER; |
2c7c9eae | 163 | |
146e86fb | 164 | #if HAVE_ALSA_ASOUNDLIB_H |
c593cf7c | 165 | # define DEFAULT_BACKEND playrtp_alsa |
166 | #elif HAVE_SYS_SOUNDCARD_H | |
167 | # define DEFAULT_BACKEND playrtp_oss | |
168 | #elif HAVE_COREAUDIO_AUDIOHARDWARE_H | |
169 | # define DEFAULT_BACKEND playrtp_coreaudio | |
170 | #else | |
171 | # error No known backend | |
172 | #endif | |
173 | ||
174 | /** @brief Backend to play with */ | |
175 | static void (*backend)(void) = &DEFAULT_BACKEND; | |
176 | ||
8e3fe3d8 | 177 | HEAP_DEFINE(pheap, struct packet *, lt_packet); |
e83d0967 RK |
178 | |
179 | static const struct option options[] = { | |
180 | { "help", no_argument, 0, 'h' }, | |
181 | { "version", no_argument, 0, 'V' }, | |
182 | { "debug", no_argument, 0, 'd' }, | |
0b75463f | 183 | { "device", required_argument, 0, 'D' }, |
1153fd23 | 184 | { "min", required_argument, 0, 'm' }, |
9086a105 | 185 | { "max", required_argument, 0, 'x' }, |
1153fd23 | 186 | { "buffer", required_argument, 0, 'b' }, |
1f10f780 | 187 | { "rcvbuf", required_argument, 0, 'R' }, |
23205f9c | 188 | { "multicast", required_argument, 0, 'M' }, |
c593cf7c | 189 | #if HAVE_SYS_SOUNDCARD_H |
190 | { "oss", no_argument, 0, 'o' }, | |
191 | #endif | |
146e86fb | 192 | #if HAVE_ALSA_ASOUNDLIB_H |
c593cf7c | 193 | { "alsa", no_argument, 0, 'a' }, |
194 | #endif | |
195 | #if HAVE_COREAUDIO_AUDIOHARDWARE_H | |
196 | { "core-audio", no_argument, 0, 'c' }, | |
197 | #endif | |
e83d0967 RK |
198 | { 0, 0, 0, 0 } |
199 | }; | |
200 | ||
28bacdc0 RK |
201 | /** @brief Drop the first packet |
202 | * | |
203 | * Assumes that @ref lock is held. | |
204 | */ | |
205 | static void drop_first_packet(void) { | |
206 | if(pheap_count(&packets)) { | |
207 | struct packet *const p = pheap_remove(&packets); | |
208 | nsamples -= p->nsamples; | |
c593cf7c | 209 | playrtp_free_packet(p); |
2c7c9eae | 210 | pthread_cond_broadcast(&cond); |
2c7c9eae | 211 | } |
9086a105 RK |
212 | } |
213 | ||
189e9830 RK |
214 | /** @brief Background thread adding packets to heap |
215 | * | |
216 | * This just transfers packets from @ref received_packets to @ref packets. It | |
217 | * is important that it holds @ref receive_lock for as little time as possible, | |
218 | * in order to minimize the interval between calls to read() in | |
219 | * listen_thread(). | |
220 | */ | |
221 | static void *queue_thread(void attribute((unused)) *arg) { | |
222 | struct packet *p; | |
223 | ||
224 | for(;;) { | |
225 | /* Get the next packet */ | |
226 | pthread_mutex_lock(&receive_lock); | |
227 | while(!received_packets) | |
228 | pthread_cond_wait(&receive_cond, &receive_lock); | |
229 | p = received_packets; | |
230 | received_packets = p->next; | |
231 | if(!received_packets) | |
232 | received_tail = &received_packets; | |
233 | --nreceived; | |
234 | pthread_mutex_unlock(&receive_lock); | |
235 | /* Add it to the heap */ | |
236 | pthread_mutex_lock(&lock); | |
237 | pheap_insert(&packets, p); | |
238 | nsamples += p->nsamples; | |
239 | pthread_cond_broadcast(&cond); | |
240 | pthread_mutex_unlock(&lock); | |
241 | } | |
242 | } | |
243 | ||
09ee2f0d | 244 | /** @brief Background thread collecting samples |
0b75463f | 245 | * |
246 | * This function collects samples, perhaps converts them to the target format, | |
b0fdc63d | 247 | * and adds them to the packet list. |
248 | * | |
249 | * It is crucial that the gap between successive calls to read() is as small as | |
250 | * possible: otherwise packets will be dropped. | |
251 | * | |
252 | * We use a binary heap to ensure that the unavoidable effort is at worst | |
253 | * logarithmic in the total number of packets - in fact if packets are mostly | |
254 | * received in order then we will largely do constant work per packet since the | |
255 | * newest packet will always be last. | |
256 | * | |
257 | * Of more concern is that we must acquire the lock on the heap to add a packet | |
258 | * to it. If this proves a problem in practice then the answer would be | |
259 | * (probably doubly) linked list with new packets added the end and a second | |
260 | * thread which reads packets off the list and adds them to the heap. | |
261 | * | |
262 | * We keep memory allocation (mostly) very fast by keeping pre-allocated | |
c593cf7c | 263 | * packets around; see @ref playrtp_new_packet(). |
b0fdc63d | 264 | */ |
0b75463f | 265 | static void *listen_thread(void attribute((unused)) *arg) { |
2c7c9eae | 266 | struct packet *p = 0; |
0b75463f | 267 | int n; |
2c7c9eae RK |
268 | struct rtp_header header; |
269 | uint16_t seq; | |
270 | uint32_t timestamp; | |
271 | struct iovec iov[2]; | |
e83d0967 RK |
272 | |
273 | for(;;) { | |
189e9830 | 274 | if(!p) |
c593cf7c | 275 | p = playrtp_new_packet(); |
2c7c9eae RK |
276 | iov[0].iov_base = &header; |
277 | iov[0].iov_len = sizeof header; | |
278 | iov[1].iov_base = p->samples_raw; | |
b64efe7e | 279 | iov[1].iov_len = sizeof p->samples_raw / sizeof *p->samples_raw; |
2c7c9eae | 280 | n = readv(rtpfd, iov, 2); |
e83d0967 RK |
281 | if(n < 0) { |
282 | switch(errno) { | |
283 | case EINTR: | |
284 | continue; | |
285 | default: | |
286 | fatal(errno, "error reading from socket"); | |
287 | } | |
288 | } | |
0b75463f | 289 | /* Ignore too-short packets */ |
345ebe66 RK |
290 | if((size_t)n <= sizeof (struct rtp_header)) { |
291 | info("ignored a short packet"); | |
0b75463f | 292 | continue; |
345ebe66 | 293 | } |
2c7c9eae RK |
294 | timestamp = htonl(header.timestamp); |
295 | seq = htons(header.seq); | |
09ee2f0d | 296 | /* Ignore packets in the past */ |
2c7c9eae | 297 | if(active && lt(timestamp, next_timestamp)) { |
c0e41690 | 298 | info("dropping old packet, timestamp=%"PRIx32" < %"PRIx32, |
2c7c9eae | 299 | timestamp, next_timestamp); |
09ee2f0d | 300 | continue; |
c0e41690 | 301 | } |
189e9830 | 302 | p->next = 0; |
58b5a68f | 303 | p->flags = 0; |
2c7c9eae | 304 | p->timestamp = timestamp; |
e83d0967 | 305 | /* Convert to target format */ |
58b5a68f RK |
306 | if(header.mpt & 0x80) |
307 | p->flags |= IDLE; | |
2c7c9eae | 308 | switch(header.mpt & 0x7F) { |
e83d0967 | 309 | case 10: |
2c7c9eae | 310 | p->nsamples = (n - sizeof header) / sizeof(uint16_t); |
e83d0967 RK |
311 | break; |
312 | /* TODO support other RFC3551 media types (when the speaker does) */ | |
313 | default: | |
0b75463f | 314 | fatal(0, "unsupported RTP payload type %d", |
2c7c9eae | 315 | header.mpt & 0x7F); |
e83d0967 | 316 | } |
345ebe66 RK |
317 | if(logfp) |
318 | fprintf(logfp, "sequence %u timestamp %"PRIx32" length %"PRIx32" end %"PRIx32"\n", | |
2c7c9eae | 319 | seq, timestamp, p->nsamples, timestamp + p->nsamples); |
0b75463f | 320 | /* Stop reading if we've reached the maximum. |
321 | * | |
322 | * This is rather unsatisfactory: it means that if packets get heavily | |
323 | * out of order then we guarantee dropouts. But for now... */ | |
345ebe66 | 324 | if(nsamples >= maxbuffer) { |
189e9830 | 325 | pthread_mutex_lock(&lock); |
345ebe66 RK |
326 | while(nsamples >= maxbuffer) |
327 | pthread_cond_wait(&cond, &lock); | |
189e9830 | 328 | pthread_mutex_unlock(&lock); |
345ebe66 | 329 | } |
189e9830 RK |
330 | /* Add the packet to the receive queue */ |
331 | pthread_mutex_lock(&receive_lock); | |
332 | *received_tail = p; | |
333 | received_tail = &p->next; | |
334 | ++nreceived; | |
335 | pthread_cond_signal(&receive_cond); | |
336 | pthread_mutex_unlock(&receive_lock); | |
58b5a68f RK |
337 | /* We'll need a new packet */ |
338 | p = 0; | |
e83d0967 RK |
339 | } |
340 | } | |
341 | ||
5626f6d2 RK |
342 | /** @brief Wait until the buffer is adequately full |
343 | * | |
344 | * Must be called with @ref lock held. | |
345 | */ | |
c593cf7c | 346 | void playrtp_fill_buffer(void) { |
bfd27c14 RK |
347 | while(nsamples) |
348 | drop_first_packet(); | |
5626f6d2 RK |
349 | info("Buffering..."); |
350 | while(nsamples < readahead) | |
351 | pthread_cond_wait(&cond, &lock); | |
352 | next_timestamp = pheap_first(&packets)->timestamp; | |
353 | active = 1; | |
354 | } | |
355 | ||
356 | /** @brief Find next packet | |
357 | * @return Packet to play or NULL if none found | |
358 | * | |
359 | * The return packet is merely guaranteed not to be in the past: it might be | |
360 | * the first packet in the future rather than one that is actually suitable to | |
361 | * play. | |
362 | * | |
363 | * Must be called with @ref lock held. | |
364 | */ | |
c593cf7c | 365 | struct packet *playrtp_next_packet(void) { |
5626f6d2 RK |
366 | while(pheap_count(&packets)) { |
367 | struct packet *const p = pheap_first(&packets); | |
368 | if(le(p->timestamp + p->nsamples, next_timestamp)) { | |
369 | /* This packet is in the past. Drop it and try another one. */ | |
370 | drop_first_packet(); | |
371 | } else | |
372 | /* This packet is NOT in the past. (It might be in the future | |
373 | * however.) */ | |
374 | return p; | |
375 | } | |
376 | return 0; | |
377 | } | |
378 | ||
09ee2f0d | 379 | /** @brief Play an RTP stream |
380 | * | |
381 | * This is the guts of the program. It is responsible for: | |
382 | * - starting the listening thread | |
383 | * - opening the audio device | |
384 | * - reading ahead to build up a buffer | |
385 | * - arranging for audio to be played | |
386 | * - detecting when the buffer has got too small and re-buffering | |
387 | */ | |
0b75463f | 388 | static void play_rtp(void) { |
389 | pthread_t ltid; | |
e83d0967 RK |
390 | |
391 | /* We receive and convert audio data in a background thread */ | |
0b75463f | 392 | pthread_create(<id, 0, listen_thread, 0); |
189e9830 RK |
393 | /* We have a second thread to add received packets to the queue */ |
394 | pthread_create(<id, 0, queue_thread, 0); | |
c593cf7c | 395 | /* The rest of the work is backend-specific */ |
396 | backend(); | |
e83d0967 RK |
397 | } |
398 | ||
399 | /* display usage message and terminate */ | |
400 | static void help(void) { | |
401 | xprintf("Usage:\n" | |
402 | " disorder-playrtp [OPTIONS] ADDRESS [PORT]\n" | |
403 | "Options:\n" | |
1153fd23 | 404 | " --device, -D DEVICE Output device\n" |
405 | " --min, -m FRAMES Buffer low water mark\n" | |
9086a105 RK |
406 | " --buffer, -b FRAMES Buffer high water mark\n" |
407 | " --max, -x FRAMES Buffer maximum size\n" | |
1f10f780 | 408 | " --rcvbuf, -R BYTES Socket receive buffer size\n" |
23205f9c | 409 | " --multicast, -M GROUP Join multicast group\n" |
146e86fb | 410 | #if HAVE_ALSA_ASOUNDLIB_H |
c593cf7c | 411 | " --alsa, -a Use ALSA to play audio\n" |
412 | #endif | |
413 | #if HAVE_SYS_SOUNDCARD_H | |
414 | " --oss, -o Use OSS to play audio\n" | |
415 | #endif | |
416 | #if HAVE_COREAUDIO_AUDIOHARDWARE_H | |
417 | " --core-audio, -c Use Core Audio to play audio\n" | |
418 | #endif | |
9086a105 RK |
419 | " --help, -h Display usage message\n" |
420 | " --version, -V Display version number\n" | |
421 | ); | |
e83d0967 RK |
422 | xfclose(stdout); |
423 | exit(0); | |
424 | } | |
425 | ||
426 | /* display version number and terminate */ | |
427 | static void version(void) { | |
428 | xprintf("disorder-playrtp version %s\n", disorder_version_string); | |
429 | xfclose(stdout); | |
430 | exit(0); | |
431 | } | |
432 | ||
433 | int main(int argc, char **argv) { | |
434 | int n; | |
435 | struct addrinfo *res; | |
436 | struct stringlist sl; | |
0b75463f | 437 | char *sockname; |
1f10f780 RK |
438 | int rcvbuf, target_rcvbuf = 131072; |
439 | socklen_t len; | |
23205f9c RK |
440 | char *multicast_group = 0; |
441 | struct ip_mreq mreq; | |
442 | struct ipv6_mreq mreq6; | |
e83d0967 | 443 | |
0b75463f | 444 | static const struct addrinfo prefs = { |
e83d0967 RK |
445 | AI_PASSIVE, |
446 | PF_INET, | |
447 | SOCK_DGRAM, | |
448 | IPPROTO_UDP, | |
449 | 0, | |
450 | 0, | |
451 | 0, | |
452 | 0 | |
453 | }; | |
454 | ||
455 | mem_init(); | |
456 | if(!setlocale(LC_CTYPE, "")) fatal(errno, "error calling setlocale"); | |
c593cf7c | 457 | while((n = getopt_long(argc, argv, "hVdD:m:b:x:L:R:M:aoc", options, 0)) >= 0) { |
e83d0967 RK |
458 | switch(n) { |
459 | case 'h': help(); | |
460 | case 'V': version(); | |
461 | case 'd': debugging = 1; break; | |
0b75463f | 462 | case 'D': device = optarg; break; |
1153fd23 | 463 | case 'm': minbuffer = 2 * atol(optarg); break; |
464 | case 'b': readahead = 2 * atol(optarg); break; | |
9086a105 | 465 | case 'x': maxbuffer = 2 * atol(optarg); break; |
345ebe66 | 466 | case 'L': logfp = fopen(optarg, "w"); break; |
1f10f780 | 467 | case 'R': target_rcvbuf = atoi(optarg); break; |
23205f9c | 468 | case 'M': multicast_group = optarg; break; |
146e86fb | 469 | #if HAVE_ALSA_ASOUNDLIB_H |
c593cf7c | 470 | case 'a': backend = playrtp_alsa; break; |
471 | #endif | |
c593cf7c | 472 | #if HAVE_SYS_SOUNDCARD_H |
473 | case 'o': backend = playrtp_oss; break; | |
474 | #endif | |
475 | #if HAVE_COREAUDIO_AUDIOHARDWARE_H | |
476 | case 'c': backend = playrtp_coreaudio; break; | |
c593cf7c | 477 | #endif |
e83d0967 RK |
478 | default: fatal(0, "invalid option"); |
479 | } | |
480 | } | |
9086a105 RK |
481 | if(!maxbuffer) |
482 | maxbuffer = 4 * readahead; | |
e83d0967 RK |
483 | argc -= optind; |
484 | argv += optind; | |
485 | if(argc < 1 || argc > 2) | |
486 | fatal(0, "usage: disorder-playrtp [OPTIONS] ADDRESS [PORT]"); | |
487 | sl.n = argc; | |
488 | sl.s = argv; | |
489 | /* Listen for inbound audio data */ | |
0b75463f | 490 | if(!(res = get_address(&sl, &prefs, &sockname))) |
e83d0967 RK |
491 | exit(1); |
492 | if((rtpfd = socket(res->ai_family, | |
493 | res->ai_socktype, | |
494 | res->ai_protocol)) < 0) | |
495 | fatal(errno, "error creating socket"); | |
496 | if(bind(rtpfd, res->ai_addr, res->ai_addrlen) < 0) | |
497 | fatal(errno, "error binding socket to %s", sockname); | |
23205f9c RK |
498 | if(multicast_group) { |
499 | if((n = getaddrinfo(multicast_group, 0, &prefs, &res))) | |
500 | fatal(0, "getaddrinfo %s: %s", multicast_group, gai_strerror(n)); | |
501 | switch(res->ai_family) { | |
502 | case PF_INET: | |
503 | mreq.imr_multiaddr = ((struct sockaddr_in *)res->ai_addr)->sin_addr; | |
504 | mreq.imr_interface.s_addr = 0; /* use primary interface */ | |
505 | if(setsockopt(rtpfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, | |
506 | &mreq, sizeof mreq) < 0) | |
507 | fatal(errno, "error calling setsockopt IP_ADD_MEMBERSHIP"); | |
508 | break; | |
509 | case PF_INET6: | |
510 | mreq6.ipv6mr_multiaddr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; | |
511 | memset(&mreq6.ipv6mr_interface, 0, sizeof mreq6.ipv6mr_interface); | |
512 | if(setsockopt(rtpfd, IPPROTO_IPV6, IPV6_JOIN_GROUP, | |
513 | &mreq6, sizeof mreq6) < 0) | |
514 | fatal(errno, "error calling setsockopt IPV6_JOIN_GROUP"); | |
515 | break; | |
516 | default: | |
517 | fatal(0, "unsupported address family %d", res->ai_family); | |
518 | } | |
519 | } | |
1f10f780 RK |
520 | len = sizeof rcvbuf; |
521 | if(getsockopt(rtpfd, SOL_SOCKET, SO_RCVBUF, &rcvbuf, &len) < 0) | |
522 | fatal(errno, "error calling getsockopt SO_RCVBUF"); | |
f0bae611 | 523 | if(target_rcvbuf > rcvbuf) { |
1f10f780 RK |
524 | if(setsockopt(rtpfd, SOL_SOCKET, SO_RCVBUF, |
525 | &target_rcvbuf, sizeof target_rcvbuf) < 0) | |
526 | error(errno, "error calling setsockopt SO_RCVBUF %d", | |
527 | target_rcvbuf); | |
528 | /* We try to carry on anyway */ | |
529 | else | |
530 | info("changed socket receive buffer from %d to %d", | |
531 | rcvbuf, target_rcvbuf); | |
532 | } else | |
533 | info("default socket receive buffer %d", rcvbuf); | |
534 | if(logfp) | |
535 | info("WARNING: -L option can impact performance"); | |
e83d0967 RK |
536 | play_rtp(); |
537 | return 0; | |
538 | } | |
539 | ||
540 | /* | |
541 | Local Variables: | |
542 | c-basic-offset:2 | |
543 | comment-column:40 | |
544 | fill-column:79 | |
545 | indent-tabs-mode:nil | |
546 | End: | |
547 | */ |