Commit | Line | Data |
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7a2c7068 RK |
1 | /* |
2 | * This file is part of DisOrder. | |
80fb0bd9 | 3 | * Copyright (C) 2009, 2013 Richard Kettlewell |
7a2c7068 RK |
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 3 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, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU 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, see <http://www.gnu.org/licenses/>. | |
17 | */ | |
e8c185c3 | 18 | /** @file lib/uaudio-rtp.c |
7a2c7068 RK |
19 | * @brief Support for RTP network play backend */ |
20 | #include "common.h" | |
21 | ||
dfa51bb7 | 22 | #include <errno.h> |
60e5bc86 | 23 | #include <sys/socket.h> |
dfa51bb7 RK |
24 | #include <ifaddrs.h> |
25 | #include <net/if.h> | |
adeb58a0 RK |
26 | #include <arpa/inet.h> |
27 | #include <netinet/in.h> | |
dfa51bb7 RK |
28 | #include <gcrypt.h> |
29 | #include <unistd.h> | |
30 | #include <time.h> | |
60e5bc86 | 31 | #include <sys/uio.h> |
80fb0bd9 | 32 | #include <pthread.h> |
7a2c7068 RK |
33 | |
34 | #include "uaudio.h" | |
35 | #include "mem.h" | |
36 | #include "log.h" | |
37 | #include "syscalls.h" | |
dfa51bb7 RK |
38 | #include "rtp.h" |
39 | #include "addr.h" | |
40 | #include "ifreq.h" | |
41 | #include "timeval.h" | |
ba70caca | 42 | #include "configuration.h" |
dfa51bb7 | 43 | |
2a2b84aa MW |
44 | /** @brief Bytes to send per network packet */ |
45 | static int rtp_max_payload; | |
dfa51bb7 RK |
46 | |
47 | /** @brief RTP payload type */ | |
48 | static int rtp_payload; | |
49 | ||
ac52c873 | 50 | /** @brief RTP broadcast/multicast output socket */ |
4285d0cf | 51 | static int rtp_fd = -1; |
dfa51bb7 | 52 | |
ac52c873 MW |
53 | /** @brief RTP unicast output socket (IPv4) */ |
54 | static int rtp_fd4 = -1; | |
55 | ||
4285d0cf MW |
56 | /** @brief RTP unicast output socket (IPv6) */ |
57 | static int rtp_fd6 = -1; | |
80fb0bd9 | 58 | |
dfa51bb7 RK |
59 | /** @brief RTP SSRC */ |
60 | static uint32_t rtp_id; | |
61 | ||
b1f6ca8c RK |
62 | /** @brief Base for timestamp */ |
63 | static uint32_t rtp_base; | |
64 | ||
dfa51bb7 RK |
65 | /** @brief RTP sequence number */ |
66 | static uint16_t rtp_sequence; | |
67 | ||
dfa51bb7 RK |
68 | /** @brief Network error count |
69 | * | |
70 | * If too many errors occur in too short a time, we give up. | |
71 | */ | |
72 | static int rtp_errors; | |
73 | ||
80fb0bd9 RK |
74 | /** @brief RTP mode */ |
75 | static int rtp_mode; | |
76 | ||
77 | #define RTP_BROADCAST 1 | |
78 | #define RTP_MULTICAST 2 | |
79 | #define RTP_UNICAST 3 | |
80 | #define RTP_REQUEST 4 | |
81 | #define RTP_AUTO 5 | |
82 | ||
83 | /** @brief A unicast client */ | |
84 | struct rtp_recipient { | |
85 | struct rtp_recipient *next; | |
86 | struct sockaddr_storage sa; | |
87 | }; | |
88 | ||
89 | /** @brief List of unicast clients */ | |
90 | static struct rtp_recipient *rtp_recipient_list; | |
91 | ||
92 | /** @brief Mutex protecting data structures */ | |
93 | static pthread_mutex_t rtp_lock = PTHREAD_MUTEX_INITIALIZER; | |
94 | ||
7a2c7068 | 95 | static const char *const rtp_options[] = { |
dfa51bb7 RK |
96 | "rtp-destination", |
97 | "rtp-destination-port", | |
98 | "rtp-source", | |
99 | "rtp-source-port", | |
100 | "multicast-ttl", | |
101 | "multicast-loop", | |
80fb0bd9 | 102 | "rtp-mode", |
2a2b84aa | 103 | "rtp-max-payload", |
10511fad | 104 | "rtp-mtu-discovery", |
7a2c7068 RK |
105 | NULL |
106 | }; | |
107 | ||
76e72f65 RK |
108 | static void rtp_get_netconfig(const char *af, |
109 | const char *addr, | |
110 | const char *port, | |
111 | struct netaddress *na) { | |
112 | char *vec[3]; | |
113 | ||
114 | vec[0] = uaudio_get(af, NULL); | |
115 | vec[1] = uaudio_get(addr, NULL); | |
116 | vec[2] = uaudio_get(port, NULL); | |
117 | if(!*vec) | |
118 | na->af = -1; | |
119 | else | |
120 | if(netaddress_parse(na, 3, vec)) | |
2e9ba080 | 121 | disorder_fatal(0, "invalid RTP address"); |
76e72f65 RK |
122 | } |
123 | ||
124 | static void rtp_set_netconfig(const char *af, | |
125 | const char *addr, | |
126 | const char *port, | |
127 | const struct netaddress *na) { | |
128 | uaudio_set(af, NULL); | |
129 | uaudio_set(addr, NULL); | |
130 | uaudio_set(port, NULL); | |
131 | if(na->af != -1) { | |
132 | int nvec; | |
133 | char **vec; | |
134 | ||
135 | netaddress_format(na, &nvec, &vec); | |
136 | if(nvec > 0) { | |
137 | uaudio_set(af, vec[0]); | |
138 | xfree(vec[0]); | |
139 | } | |
140 | if(nvec > 1) { | |
141 | uaudio_set(addr, vec[1]); | |
142 | xfree(vec[1]); | |
143 | } | |
144 | if(nvec > 2) { | |
145 | uaudio_set(port, vec[2]); | |
146 | xfree(vec[2]); | |
147 | } | |
148 | xfree(vec); | |
149 | } | |
150 | } | |
151 | ||
b1f6ca8c | 152 | static size_t rtp_play(void *buffer, size_t nsamples, unsigned flags) { |
dfa51bb7 RK |
153 | struct rtp_header header; |
154 | struct iovec vec[2]; | |
b1f6ca8c RK |
155 | |
156 | #if 0 | |
157 | if(flags & (UAUDIO_PAUSE|UAUDIO_RESUME)) | |
158 | fprintf(stderr, "rtp_play %zu samples%s%s%s%s\n", nsamples, | |
159 | flags & UAUDIO_PAUSE ? " UAUDIO_PAUSE" : "", | |
160 | flags & UAUDIO_RESUME ? " UAUDIO_RESUME" : "", | |
161 | flags & UAUDIO_PLAYING ? " UAUDIO_PLAYING" : "", | |
162 | flags & UAUDIO_PAUSED ? " UAUDIO_PAUSED" : ""); | |
163 | #endif | |
164 | ||
dfa51bb7 RK |
165 | /* We do as much work as possible before checking what time it is */ |
166 | /* Fill out header */ | |
167 | header.vpxcc = 2 << 6; /* V=2, P=0, X=0, CC=0 */ | |
168 | header.seq = htons(rtp_sequence++); | |
169 | header.ssrc = rtp_id; | |
b1f6ca8c RK |
170 | header.mpt = rtp_payload; |
171 | /* If we've come out of a pause, set the marker bit */ | |
172 | if(flags & UAUDIO_RESUME) | |
173 | header.mpt |= 0x80; | |
dfa51bb7 RK |
174 | #if !WORDS_BIGENDIAN |
175 | /* Convert samples to network byte order */ | |
176 | uint16_t *u = buffer, *const limit = u + nsamples; | |
177 | while(u < limit) { | |
178 | *u = htons(*u); | |
179 | ++u; | |
180 | } | |
181 | #endif | |
182 | vec[0].iov_base = (void *)&header; | |
183 | vec[0].iov_len = sizeof header; | |
184 | vec[1].iov_base = buffer; | |
185 | vec[1].iov_len = nsamples * uaudio_sample_size; | |
b1f6ca8c RK |
186 | const uint32_t timestamp = uaudio_schedule_sync(); |
187 | header.timestamp = htonl(rtp_base + (uint32_t)timestamp); | |
87864f77 RK |
188 | |
189 | /* We send ~120 packets a second with current arrangements. So if we log | |
190 | * once every 8192 packets we log about once a minute. */ | |
191 | ||
192 | if(!(ntohs(header.seq) & 8191) | |
193 | && config->rtp_verbose) | |
194 | disorder_info("RTP: seq %04"PRIx16" %08"PRIx32"+%08"PRIx32"=%08"PRIx32" ns %zu%s", | |
195 | ntohs(header.seq), | |
196 | rtp_base, | |
197 | timestamp, | |
198 | header.timestamp, | |
199 | nsamples, | |
200 | flags & UAUDIO_PAUSED ? " [paused]" : ""); | |
201 | ||
b1f6ca8c RK |
202 | /* If we're paused don't actually end a packet, we just pretend */ |
203 | if(flags & UAUDIO_PAUSED) { | |
204 | uaudio_schedule_sent(nsamples); | |
205 | return nsamples; | |
206 | } | |
43e7474d MW |
207 | /* Send stuff to explicitly registerd unicast addresses unconditionally */ |
208 | struct rtp_recipient *r; | |
209 | struct msghdr m; | |
210 | memset(&m, 0, sizeof m); | |
211 | m.msg_iov = vec; | |
212 | m.msg_iovlen = 2; | |
213 | pthread_mutex_lock(&rtp_lock); | |
214 | for(r = rtp_recipient_list; r; r = r->next) { | |
215 | m.msg_name = &r->sa; | |
216 | m.msg_namelen = r->sa.ss_family == AF_INET ? | |
217 | sizeof(struct sockaddr_in) : sizeof (struct sockaddr_in6); | |
218 | sendmsg(r->sa.ss_family == AF_INET ? rtp_fd4 : rtp_fd6, | |
219 | &m, MSG_DONTWAIT|MSG_NOSIGNAL); | |
220 | // TODO similar error handling to other case? | |
221 | } | |
222 | pthread_mutex_unlock(&rtp_lock); | |
223 | if(rtp_mode != RTP_REQUEST) { | |
80fb0bd9 RK |
224 | int written_bytes; |
225 | do { | |
226 | written_bytes = writev(rtp_fd, vec, 2); | |
227 | } while(written_bytes < 0 && errno == EINTR); | |
228 | if(written_bytes < 0) { | |
229 | disorder_error(errno, "error transmitting audio data"); | |
230 | ++rtp_errors; | |
231 | if(rtp_errors == 10) | |
232 | disorder_fatal(0, "too many audio transmission errors"); | |
233 | return 0; | |
234 | } else | |
235 | rtp_errors /= 2; /* gradual decay */ | |
236 | } | |
b1f6ca8c RK |
237 | /* TODO what can we sensibly do about short writes here? Really that's just |
238 | * an error and we ought to be using smaller packets. */ | |
239 | uaudio_schedule_sent(nsamples); | |
240 | return nsamples; | |
dfa51bb7 RK |
241 | } |
242 | ||
d5172201 MW |
243 | static void hack_send_buffer_size(int fd, const char *what) { |
244 | int sndbuf, target_sndbuf = 131072; | |
245 | socklen_t len = sizeof sndbuf; | |
246 | ||
247 | if(getsockopt(fd, SOL_SOCKET, SO_SNDBUF, | |
248 | &sndbuf, &len) < 0) | |
249 | disorder_fatal(errno, "error getting SO_SNDBUF on %s socket", what); | |
250 | if(target_sndbuf > sndbuf) { | |
251 | if(setsockopt(fd, SOL_SOCKET, SO_SNDBUF, | |
252 | &target_sndbuf, sizeof target_sndbuf) < 0) | |
253 | disorder_error(errno, "error setting SO_SNDBUF on %s socket to %d", | |
254 | what, target_sndbuf); | |
255 | else | |
256 | disorder_info("changed socket send buffer size on %socket from %d to %d", | |
257 | what, sndbuf, target_sndbuf); | |
258 | } else | |
259 | disorder_info("default socket send buffer on %s socket is %d", | |
260 | what, sndbuf); | |
261 | } | |
262 | ||
dfa51bb7 | 263 | static void rtp_open(void) { |
802bb596 MW |
264 | struct resolved *dres, *sres; |
265 | size_t ndres, nsres; | |
dfa51bb7 | 266 | static const int one = 1; |
76e72f65 | 267 | struct netaddress dst[1], src[1]; |
80fb0bd9 | 268 | const char *mode; |
10511fad MW |
269 | #ifdef IP_MTU_DISCOVER |
270 | const char *mtu_disc; | |
271 | int opt; | |
272 | #endif | |
dfa51bb7 | 273 | |
80fb0bd9 RK |
274 | /* Get the mode */ |
275 | mode = uaudio_get("rtp-mode", "auto"); | |
276 | if(!strcmp(mode, "broadcast")) rtp_mode = RTP_BROADCAST; | |
277 | else if(!strcmp(mode, "multicast")) rtp_mode = RTP_MULTICAST; | |
278 | else if(!strcmp(mode, "unicast")) rtp_mode = RTP_UNICAST; | |
279 | else if(!strcmp(mode, "request")) rtp_mode = RTP_REQUEST; | |
280 | else rtp_mode = RTP_AUTO; | |
281 | /* Get the source and destination addresses (which might be missing) */ | |
76e72f65 RK |
282 | rtp_get_netconfig("rtp-destination-af", |
283 | "rtp-destination", | |
284 | "rtp-destination-port", | |
285 | dst); | |
286 | rtp_get_netconfig("rtp-source-af", | |
287 | "rtp-source", | |
288 | "rtp-source-port", | |
289 | src); | |
80fb0bd9 | 290 | if(dst->af != -1) { |
802bb596 | 291 | if(netaddress_resolve(dst, 0, SOCK_DGRAM, &dres, &ndres)) |
80fb0bd9 | 292 | exit(-1); |
802bb596 | 293 | } else { |
80fb0bd9 | 294 | dres = 0; |
802bb596 MW |
295 | ndres = 0; |
296 | } | |
76e72f65 | 297 | if(src->af != -1) { |
802bb596 | 298 | if(netaddress_resolve(src, 0, SOCK_DGRAM, &sres, &nsres)) |
76e72f65 | 299 | exit(-1); |
802bb596 | 300 | } else { |
dfa51bb7 | 301 | sres = 0; |
802bb596 MW |
302 | nsres = 0; |
303 | } | |
80fb0bd9 RK |
304 | /* _AUTO inspects the destination address and acts accordingly */ |
305 | if(rtp_mode == RTP_AUTO) { | |
306 | if(!dres) | |
307 | rtp_mode = RTP_REQUEST; | |
802bb596 | 308 | else if(multicast(dres->sa)) |
80fb0bd9 RK |
309 | rtp_mode = RTP_MULTICAST; |
310 | else { | |
311 | struct ifaddrs *ifs; | |
312 | ||
313 | if(getifaddrs(&ifs) < 0) | |
314 | disorder_fatal(errno, "error calling getifaddrs"); | |
315 | while(ifs) { | |
316 | /* (At least on Darwin) IFF_BROADCAST might be set but ifa_broadaddr | |
317 | * still a null pointer. It turns out that there's a subsequent entry | |
318 | * for he same interface which _does_ have ifa_broadaddr though... */ | |
319 | if((ifs->ifa_flags & IFF_BROADCAST) | |
320 | && ifs->ifa_broadaddr | |
802bb596 | 321 | && sockaddr_equal(ifs->ifa_broadaddr, dres->sa)) |
80fb0bd9 RK |
322 | break; |
323 | ifs = ifs->ifa_next; | |
324 | } | |
325 | if(ifs) | |
326 | rtp_mode = RTP_BROADCAST; | |
327 | else | |
328 | rtp_mode = RTP_UNICAST; | |
329 | } | |
330 | } | |
2a2b84aa MW |
331 | rtp_max_payload = atoi(uaudio_get("rtp-max-payload", "-1")); |
332 | if(rtp_max_payload < 0) | |
333 | rtp_max_payload = 1500 - 8/*UDP*/ - 40/*IP*/ - 8/*conservatism*/; | |
ac52c873 | 334 | /* Create the sockets */ |
80fb0bd9 | 335 | if(rtp_mode != RTP_REQUEST) { |
802bb596 | 336 | if((rtp_fd = socket(dres->sa->sa_family, SOCK_DGRAM, IPPROTO_UDP)) < 0) |
80fb0bd9 | 337 | disorder_fatal(errno, "error creating RTP transmission socket"); |
80fb0bd9 | 338 | } |
ac52c873 MW |
339 | if((rtp_fd4 = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) |
340 | disorder_fatal(errno, "error creating v4 RTP transmission socket"); | |
341 | if((rtp_fd6 = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP)) < 0) | |
342 | disorder_fatal(errno, "error creating v6 RTP transmission socket"); | |
80fb0bd9 RK |
343 | /* Configure the socket according to the desired mode */ |
344 | switch(rtp_mode) { | |
345 | case RTP_MULTICAST: { | |
dfa51bb7 | 346 | /* Enable multicast options */ |
b50cfb8a RK |
347 | const int ttl = atoi(uaudio_get("multicast-ttl", "1")); |
348 | const int loop = !strcmp(uaudio_get("multicast-loop", "yes"), "yes"); | |
802bb596 | 349 | switch(dres->sa->sa_family) { |
dfa51bb7 RK |
350 | case PF_INET: { |
351 | if(setsockopt(rtp_fd, IPPROTO_IP, IP_MULTICAST_TTL, | |
352 | &ttl, sizeof ttl) < 0) | |
2e9ba080 | 353 | disorder_fatal(errno, "error setting IP_MULTICAST_TTL on multicast socket"); |
dfa51bb7 RK |
354 | if(setsockopt(rtp_fd, IPPROTO_IP, IP_MULTICAST_LOOP, |
355 | &loop, sizeof loop) < 0) | |
2e9ba080 | 356 | disorder_fatal(errno, "error setting IP_MULTICAST_LOOP on multicast socket"); |
dfa51bb7 RK |
357 | break; |
358 | } | |
359 | case PF_INET6: { | |
360 | if(setsockopt(rtp_fd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, | |
361 | &ttl, sizeof ttl) < 0) | |
2e9ba080 | 362 | disorder_fatal(errno, "error setting IPV6_MULTICAST_HOPS on multicast socket"); |
dfa51bb7 RK |
363 | if(setsockopt(rtp_fd, IPPROTO_IP, IPV6_MULTICAST_LOOP, |
364 | &loop, sizeof loop) < 0) | |
2e9ba080 | 365 | disorder_fatal(errno, "error setting IPV6_MULTICAST_LOOP on multicast socket"); |
dfa51bb7 RK |
366 | break; |
367 | } | |
368 | default: | |
802bb596 | 369 | disorder_fatal(0, "unsupported address family %d", dres->sa->sa_family); |
dfa51bb7 | 370 | } |
2e9ba080 | 371 | disorder_info("multicasting on %s TTL=%d loop=%s", |
802bb596 | 372 | format_sockaddr(dres->sa), ttl, loop ? "yes" : "no"); |
80fb0bd9 RK |
373 | break; |
374 | } | |
375 | case RTP_UNICAST: { | |
802bb596 | 376 | disorder_info("unicasting on %s", format_sockaddr(dres->sa)); |
80fb0bd9 RK |
377 | break; |
378 | } | |
379 | case RTP_BROADCAST: { | |
380 | if(setsockopt(rtp_fd, SOL_SOCKET, SO_BROADCAST, &one, sizeof one) < 0) | |
381 | disorder_fatal(errno, "error setting SO_BROADCAST on broadcast socket"); | |
382 | disorder_info("broadcasting on %s", | |
802bb596 | 383 | format_sockaddr(dres->sa)); |
80fb0bd9 RK |
384 | break; |
385 | } | |
386 | case RTP_REQUEST: { | |
387 | disorder_info("will transmit on request"); | |
388 | break; | |
389 | } | |
dfa51bb7 | 390 | } |
d5172201 | 391 | /* Enlarge the socket buffers */ |
ac52c873 MW |
392 | if (rtp_fd != -1) hack_send_buffer_size(rtp_fd, "master socket"); |
393 | hack_send_buffer_size(rtp_fd4, "IPv4 on-demand socket"); | |
dc24572f | 394 | hack_send_buffer_size(rtp_fd6, "IPv6 on-demand socket"); |
dfa51bb7 RK |
395 | /* We might well want to set additional broadcast- or multicast-related |
396 | * options here */ | |
80fb0bd9 | 397 | if(rtp_mode != RTP_REQUEST) { |
802bb596 | 398 | if(sres && bind(rtp_fd, sres->sa, sres->len) < 0) |
80fb0bd9 | 399 | disorder_fatal(errno, "error binding broadcast socket to %s", |
802bb596 MW |
400 | format_sockaddr(sres->sa)); |
401 | if(connect(rtp_fd, dres->sa, dres->len) < 0) | |
80fb0bd9 | 402 | disorder_fatal(errno, "error connecting broadcast socket to %s", |
802bb596 | 403 | format_sockaddr(dres->sa)); |
80fb0bd9 | 404 | } |
10511fad MW |
405 | #ifdef IP_MTU_DISCOVER |
406 | mtu_disc = uaudio_get("rtp-mtu-discovery", "default"); | |
407 | do { | |
408 | if(!strcmp(mtu_disc, "yes")) opt = IP_PMTUDISC_DO; | |
409 | else if(!strcmp(mtu_disc, "no")) opt = IP_PMTUDISC_DONT; | |
410 | else break; | |
411 | if(setsockopt(rtp_fd4, IPPROTO_IP, IP_MTU_DISCOVER, &opt, sizeof opt)) | |
412 | disorder_fatal(errno, "error setting MTU discovery"); | |
802bb596 | 413 | if(sres->sa->sa_family == AF_INET && |
10511fad MW |
414 | setsockopt(rtp_fd, IPPROTO_IP, IP_MTU_DISCOVER, &opt, sizeof opt)) |
415 | disorder_fatal(errno, "error setting MTU discovery"); | |
416 | } while (0); | |
417 | #endif | |
87864f77 RK |
418 | if(config->rtp_verbose) |
419 | disorder_info("RTP: prepared socket"); | |
dfa51bb7 RK |
420 | } |
421 | ||
7a2c7068 RK |
422 | static void rtp_start(uaudio_callback *callback, |
423 | void *userdata) { | |
dfa51bb7 RK |
424 | /* We only support L16 (but we do stereo and mono and will convert sign) */ |
425 | if(uaudio_channels == 2 | |
426 | && uaudio_bits == 16 | |
427 | && uaudio_rate == 44100) | |
428 | rtp_payload = 10; | |
429 | else if(uaudio_channels == 1 | |
430 | && uaudio_bits == 16 | |
431 | && uaudio_rate == 44100) | |
432 | rtp_payload = 11; | |
433 | else | |
2e9ba080 RK |
434 | disorder_fatal(0, "asked for %d/%d/%d 16/44100/1 and 16/44100/2", |
435 | uaudio_bits, uaudio_rate, uaudio_channels); | |
87864f77 RK |
436 | if(config->rtp_verbose) |
437 | disorder_info("RTP: %d channels %d bits %d Hz payload type %d", | |
438 | uaudio_channels, uaudio_bits, uaudio_rate, rtp_payload); | |
ec57f6c9 RK |
439 | /* Various fields are required to have random initial values by RFC3550. The |
440 | * packet contents are highly public so there's no point asking for very | |
441 | * strong randomness. */ | |
442 | gcry_create_nonce(&rtp_id, sizeof rtp_id); | |
b1f6ca8c | 443 | gcry_create_nonce(&rtp_base, sizeof rtp_base); |
ec57f6c9 | 444 | gcry_create_nonce(&rtp_sequence, sizeof rtp_sequence); |
87864f77 RK |
445 | if(config->rtp_verbose) |
446 | disorder_info("RTP: id %08"PRIx32" base %08"PRIx32" initial seq %08"PRIx16, | |
447 | rtp_id, rtp_base, rtp_sequence); | |
dfa51bb7 | 448 | rtp_open(); |
ec57f6c9 | 449 | uaudio_schedule_init(); |
87864f77 RK |
450 | if(config->rtp_verbose) |
451 | disorder_info("RTP: initialized schedule"); | |
dfa51bb7 RK |
452 | uaudio_thread_start(callback, |
453 | userdata, | |
454 | rtp_play, | |
455 | 256 / uaudio_sample_size, | |
2a2b84aa | 456 | (rtp_max_payload - sizeof(struct rtp_header)) |
63761c19 RK |
457 | / uaudio_sample_size, |
458 | 0); | |
87864f77 RK |
459 | if(config->rtp_verbose) |
460 | disorder_info("RTP: created thread"); | |
7a2c7068 RK |
461 | } |
462 | ||
463 | static void rtp_stop(void) { | |
dfa51bb7 | 464 | uaudio_thread_stop(); |
ac52c873 MW |
465 | if(rtp_fd >= 0) { close(rtp_fd); rtp_fd = -1; } |
466 | if(rtp_fd4 >= 0) { close(rtp_fd4); rtp_fd4 = -1; } | |
2301e915 | 467 | if(rtp_fd6 >= 0) { close(rtp_fd6); rtp_fd6 = -1; } |
7a2c7068 RK |
468 | } |
469 | ||
ba70caca RK |
470 | static void rtp_configure(void) { |
471 | char buffer[64]; | |
472 | ||
b0116b5c | 473 | uaudio_set("rtp-mode", config->rtp_mode); |
76e72f65 RK |
474 | rtp_set_netconfig("rtp-destination-af", |
475 | "rtp-destination", | |
476 | "rtp-destination-port", &config->broadcast); | |
477 | rtp_set_netconfig("rtp-source-af", | |
478 | "rtp-source", | |
479 | "rtp-source-port", &config->broadcast_from); | |
ba70caca RK |
480 | snprintf(buffer, sizeof buffer, "%ld", config->multicast_ttl); |
481 | uaudio_set("multicast-ttl", buffer); | |
482 | uaudio_set("multicast-loop", config->multicast_loop ? "yes" : "no"); | |
2a2b84aa MW |
483 | snprintf(buffer, sizeof buffer, "%ld", config->rtp_max_payload); |
484 | uaudio_set("rtp-max-payload", buffer); | |
10511fad | 485 | uaudio_set("rtp-mtu-discovery", config->rtp_mtu_discovery); |
87864f77 RK |
486 | if(config->rtp_verbose) |
487 | disorder_info("RTP: configured"); | |
ba70caca RK |
488 | } |
489 | ||
80fb0bd9 RK |
490 | /** @brief Add an RTP recipient address |
491 | * @param sa Pointer to recipient address | |
492 | * @return 0 on success, -1 on error | |
493 | */ | |
494 | int rtp_add_recipient(const struct sockaddr_storage *sa) { | |
495 | struct rtp_recipient *r; | |
496 | int rc; | |
497 | pthread_mutex_lock(&rtp_lock); | |
498 | for(r = rtp_recipient_list; | |
499 | r && sockaddrcmp((struct sockaddr *)sa, | |
500 | (struct sockaddr *)&r->sa); | |
501 | r = r->next) | |
502 | ; | |
503 | if(r) | |
504 | rc = -1; | |
505 | else { | |
506 | r = xmalloc(sizeof *r); | |
c0dadbae | 507 | memcpy(&r->sa, sa, sizeof *sa); |
80fb0bd9 RK |
508 | r->next = rtp_recipient_list; |
509 | rtp_recipient_list = r; | |
510 | rc = 0; | |
511 | } | |
512 | pthread_mutex_unlock(&rtp_lock); | |
513 | return rc; | |
514 | } | |
515 | ||
516 | /** @brief Remove an RTP recipient address | |
517 | * @param sa Pointer to recipient address | |
518 | * @return 0 on success, -1 on error | |
519 | */ | |
520 | int rtp_remove_recipient(const struct sockaddr_storage *sa) { | |
521 | struct rtp_recipient *r, **rr; | |
522 | int rc; | |
523 | pthread_mutex_lock(&rtp_lock); | |
524 | for(rr = &rtp_recipient_list; | |
525 | (r = *rr) && sockaddrcmp((struct sockaddr *)sa, | |
526 | (struct sockaddr *)&r->sa); | |
527 | rr = &r->next) | |
528 | ; | |
529 | if(r) { | |
530 | *rr = r->next; | |
531 | xfree(r); | |
532 | rc = 0; | |
533 | } else { | |
534 | disorder_error(0, "bogus rtp_remove_recipient"); | |
535 | rc = -1; | |
536 | } | |
537 | pthread_mutex_unlock(&rtp_lock); | |
538 | return rc; | |
539 | } | |
540 | ||
7a2c7068 RK |
541 | const struct uaudio uaudio_rtp = { |
542 | .name = "rtp", | |
543 | .options = rtp_options, | |
544 | .start = rtp_start, | |
545 | .stop = rtp_stop, | |
b1f6ca8c RK |
546 | .activate = uaudio_thread_activate, |
547 | .deactivate = uaudio_thread_deactivate, | |
ba70caca | 548 | .configure = rtp_configure, |
06385470 | 549 | .flags = UAUDIO_API_SERVER, |
7a2c7068 RK |
550 | }; |
551 | ||
552 | /* | |
553 | Local Variables: | |
554 | c-basic-offset:2 | |
555 | comment-column:40 | |
556 | fill-column:79 | |
557 | indent-tabs-mode:nil | |
558 | End: | |
559 | */ |