2 * Copyright (C) 2011-2012 Juho Vähä-Herttua
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
23 #include "raop_buffer.h"
29 #define NO_FLUSH (-42)
33 raop_callbacks_t callbacks
;
35 /* Buffer to handle all resends */
36 raop_buffer_t
*buffer
;
38 /* Remote address as sockaddr */
39 struct sockaddr_storage remote_saddr
;
40 socklen_t remote_saddr_len
;
42 /* These variables only edited mutex locked */
47 thread_handle_t thread
;
48 mutex_handle_t run_mutex
;
50 /* Remote control and timing ports */
51 unsigned short control_rport
;
52 unsigned short timing_rport
;
54 /* Sockets for control, timing and data */
55 int csock
, tsock
, dsock
;
57 /* Local control, timing and data ports */
58 unsigned short control_lport
;
59 unsigned short timing_lport
;
60 unsigned short data_lport
;
62 /* Initialized after the first control packet */
63 struct sockaddr_storage control_saddr
;
64 socklen_t control_saddr_len
;
65 unsigned short control_seqnum
;
69 raop_rtp_parse_remote(raop_rtp_t
*raop_rtp
, const char *remote
)
79 current
= original
= strdup(remote
);
83 tmpstr
= utils_strsep(¤t
, " ");
84 if (strcmp(tmpstr
, "IN")) {
88 tmpstr
= utils_strsep(¤t
, " ");
89 if (!strcmp(tmpstr
, "IP4") && current
) {
91 } else if (!strcmp(tmpstr
, "IP6") && current
) {
97 ret
= netutils_parse_address(family
, current
,
98 &raop_rtp
->remote_saddr
,
99 sizeof(raop_rtp
->remote_saddr
));
104 raop_rtp
->remote_saddr_len
= ret
;
110 raop_rtp_init(logger_t
*logger
, raop_callbacks_t
*callbacks
, const char *remote
,
111 const char *fmtp
, const unsigned char *aeskey
, const unsigned char *aesiv
)
113 raop_rtp_t
*raop_rtp
;
120 raop_rtp
= calloc(1, sizeof(raop_rtp_t
));
124 raop_rtp
->logger
= logger
;
125 memcpy(&raop_rtp
->callbacks
, callbacks
, sizeof(raop_callbacks_t
));
126 raop_rtp
->buffer
= raop_buffer_init(fmtp
, aeskey
, aesiv
);
127 if (!raop_rtp
->buffer
) {
131 if (raop_rtp_parse_remote(raop_rtp
, remote
) < 0) {
136 raop_rtp
->running
= 0;
137 raop_rtp
->joined
= 1;
138 raop_rtp
->flush
= NO_FLUSH
;
139 MUTEX_CREATE(raop_rtp
->run_mutex
);
145 raop_rtp_destroy(raop_rtp_t
*raop_rtp
)
148 raop_rtp_stop(raop_rtp
);
150 MUTEX_DESTROY(raop_rtp
->run_mutex
);
151 raop_buffer_destroy(raop_rtp
->buffer
);
157 raop_rtp_init_sockets(raop_rtp_t
*raop_rtp
, int use_ipv6
, int use_udp
)
159 int csock
= -1, tsock
= -1, dsock
= -1;
160 unsigned short cport
= 0, tport
= 0, dport
= 0;
165 csock
= netutils_init_socket(&cport
, use_ipv6
, use_udp
);
166 tsock
= netutils_init_socket(&tport
, use_ipv6
, use_udp
);
167 if (csock
== -1 || tsock
== -1) {
168 goto sockets_cleanup
;
171 dsock
= netutils_init_socket(&dport
, use_ipv6
, use_udp
);
173 goto sockets_cleanup
;
176 /* Listen to the data socket if using TCP */
178 if (listen(dsock
, 1) < 0)
179 goto sockets_cleanup
;
182 /* Set socket descriptors */
183 raop_rtp
->csock
= csock
;
184 raop_rtp
->tsock
= tsock
;
185 raop_rtp
->dsock
= dsock
;
187 /* Set port values */
188 raop_rtp
->control_lport
= cport
;
189 raop_rtp
->timing_lport
= tport
;
190 raop_rtp
->data_lport
= dport
;
194 if (csock
!= -1) closesocket(csock
);
195 if (tsock
!= -1) closesocket(tsock
);
196 if (dsock
!= -1) closesocket(dsock
);
201 raop_rtp_resend_callback(void *opaque
, unsigned short seqnum
, unsigned short count
)
203 raop_rtp_t
*raop_rtp
= opaque
;
204 unsigned char packet
[8];
205 unsigned short ourseqnum
;
206 struct sockaddr
*addr
;
210 addr
= (struct sockaddr
*)&raop_rtp
->control_saddr
;
211 addrlen
= raop_rtp
->control_saddr_len
;
213 logger_log(raop_rtp
->logger
, LOGGER_DEBUG
, "Got resend request %d %d", seqnum
, count
);
214 ourseqnum
= raop_rtp
->control_seqnum
++;
216 /* Fill the request buffer */
218 packet
[1] = 0x55|0x80;
219 packet
[2] = (ourseqnum
>> 8);
220 packet
[3] = ourseqnum
;
221 packet
[4] = (seqnum
>> 8);
223 packet
[6] = (count
>> 8);
226 ret
= sendto(raop_rtp
->csock
, (const char *)packet
, sizeof(packet
), 0, addr
, addrlen
);
228 logger_log(raop_rtp
->logger
, LOGGER_WARNING
, "Resend failed: %d", SOCKET_GET_ERROR());
235 raop_rtp_thread_udp(void *arg
)
237 raop_rtp_t
*raop_rtp
= arg
;
238 unsigned char packet
[RAOP_PACKET_LEN
];
239 unsigned int packetlen
;
240 struct sockaddr_storage saddr
;
244 const ALACSpecificConfig
*config
;
245 void *cb_data
= NULL
;
249 config
= raop_buffer_get_config(raop_rtp
->buffer
);
250 cb_data
= raop_rtp
->callbacks
.audio_init(raop_rtp
->callbacks
.cls
,
263 MUTEX_LOCK(raop_rtp
->run_mutex
);
264 if (!raop_rtp
->running
) {
265 MUTEX_UNLOCK(raop_rtp
->run_mutex
);
268 /* Read the volume level */
269 volume_changed
= (volume
!= raop_rtp
->volume
);
270 volume
= raop_rtp
->volume
;
272 /* Read the flush value */
273 flush
= raop_rtp
->flush
;
274 raop_rtp
->flush
= NO_FLUSH
;
275 MUTEX_UNLOCK(raop_rtp
->run_mutex
);
277 /* Call set_volume callback if changed */
278 if (volume_changed
) {
279 raop_rtp
->callbacks
.audio_set_volume(raop_rtp
->callbacks
.cls
, cb_data
, volume
);
281 if (flush
!= NO_FLUSH
) {
282 raop_buffer_flush(raop_rtp
->buffer
, flush
);
283 raop_rtp
->callbacks
.audio_flush(raop_rtp
->callbacks
.cls
, cb_data
);
286 /* Set timeout value to 5ms */
290 /* Get the correct nfds value */
291 nfds
= raop_rtp
->csock
+1;
292 if (raop_rtp
->tsock
>= nfds
)
293 nfds
= raop_rtp
->tsock
+1;
294 if (raop_rtp
->dsock
>= nfds
)
295 nfds
= raop_rtp
->dsock
+1;
297 /* Set rfds and call select */
299 FD_SET(raop_rtp
->csock
, &rfds
);
300 FD_SET(raop_rtp
->tsock
, &rfds
);
301 FD_SET(raop_rtp
->dsock
, &rfds
);
302 ret
= select(nfds
, &rfds
, NULL
, NULL
, &tv
);
304 /* Timeout happened */
306 } else if (ret
== -1) {
307 /* FIXME: Error happened */
311 if (FD_ISSET(raop_rtp
->csock
, &rfds
)) {
312 saddrlen
= sizeof(saddr
);
313 packetlen
= recvfrom(raop_rtp
->csock
, (char *)packet
, sizeof(packet
), 0,
314 (struct sockaddr
*)&saddr
, &saddrlen
);
316 /* Get the destination address here, because we need the sin6_scope_id */
317 memcpy(&raop_rtp
->control_saddr
, &saddr
, saddrlen
);
318 raop_rtp
->control_saddr_len
= saddrlen
;
320 if (packetlen
>= 12) {
321 char type
= packet
[1] & ~0x80;
323 logger_log(raop_rtp
->logger
, LOGGER_DEBUG
, "Got control packet of type 0x%02x", type
);
325 /* Handle resent data packet */
326 int ret
= raop_buffer_queue(raop_rtp
->buffer
, packet
+4, packetlen
-4, 1);
330 } else if (FD_ISSET(raop_rtp
->tsock
, &rfds
)) {
331 logger_log(raop_rtp
->logger
, LOGGER_INFO
, "Would have timing packet in queue");
332 } else if (FD_ISSET(raop_rtp
->dsock
, &rfds
)) {
333 saddrlen
= sizeof(saddr
);
334 packetlen
= recvfrom(raop_rtp
->dsock
, (char *)packet
, sizeof(packet
), 0,
335 (struct sockaddr
*)&saddr
, &saddrlen
);
336 if (packetlen
>= 12) {
337 int no_resend
= (raop_rtp
->control_rport
== 0);
340 const void *audiobuf
;
343 ret
= raop_buffer_queue(raop_rtp
->buffer
, packet
, packetlen
, 1);
346 /* Decode all frames in queue */
347 while ((audiobuf
= raop_buffer_dequeue(raop_rtp
->buffer
, &audiobuflen
, no_resend
))) {
348 raop_rtp
->callbacks
.audio_process(raop_rtp
->callbacks
.cls
, cb_data
, audiobuf
, audiobuflen
);
351 /* Handle possible resend requests */
353 raop_buffer_handle_resends(raop_rtp
->buffer
, raop_rtp_resend_callback
, raop_rtp
);
358 logger_log(raop_rtp
->logger
, LOGGER_INFO
, "Exiting UDP RAOP thread");
359 raop_rtp
->callbacks
.audio_destroy(raop_rtp
->callbacks
.cls
, cb_data
);
365 raop_rtp_thread_tcp(void *arg
)
367 raop_rtp_t
*raop_rtp
= arg
;
369 unsigned char packet
[RAOP_PACKET_LEN
];
370 unsigned int packetlen
= 0;
373 const ALACSpecificConfig
*config
;
374 void *cb_data
= NULL
;
378 config
= raop_buffer_get_config(raop_rtp
->buffer
);
379 cb_data
= raop_rtp
->callbacks
.audio_init(raop_rtp
->callbacks
.cls
,
391 MUTEX_LOCK(raop_rtp
->run_mutex
);
392 if (!raop_rtp
->running
) {
393 MUTEX_UNLOCK(raop_rtp
->run_mutex
);
396 volume_changed
= (volume
!= raop_rtp
->volume
);
397 volume
= raop_rtp
->volume
;
398 MUTEX_UNLOCK(raop_rtp
->run_mutex
);
400 /* Call set_volume callback if changed */
401 if (volume_changed
) {
402 raop_rtp
->callbacks
.audio_set_volume(raop_rtp
->callbacks
.cls
, cb_data
, volume
);
405 /* Set timeout value to 5ms */
409 /* Get the correct nfds value and set rfds */
411 if (stream_fd
== -1) {
412 FD_SET(raop_rtp
->dsock
, &rfds
);
413 nfds
= raop_rtp
->dsock
+1;
415 FD_SET(stream_fd
, &rfds
);
418 ret
= select(nfds
, &rfds
, NULL
, NULL
, &tv
);
420 /* Timeout happened */
422 } else if (ret
== -1) {
423 /* FIXME: Error happened */
424 logger_log(raop_rtp
->logger
, LOGGER_INFO
, "Error in select");
427 if (stream_fd
== -1 && FD_ISSET(raop_rtp
->dsock
, &rfds
)) {
428 struct sockaddr_storage saddr
;
431 logger_log(raop_rtp
->logger
, LOGGER_INFO
, "Accepting client");
432 saddrlen
= sizeof(saddr
);
433 stream_fd
= accept(raop_rtp
->dsock
, (struct sockaddr
*)&saddr
, &saddrlen
);
434 if (stream_fd
== -1) {
435 /* FIXME: Error happened */
436 logger_log(raop_rtp
->logger
, LOGGER_INFO
, "Error in accept %d %s", errno
, strerror(errno
));
440 if (stream_fd
!= -1 && FD_ISSET(stream_fd
, &rfds
)) {
441 unsigned int rtplen
=0;
443 const void *audiobuf
;
446 ret
= recv(stream_fd
, (char *)(packet
+packetlen
), sizeof(packet
)-packetlen
, 0);
448 /* TCP socket closed */
449 logger_log(raop_rtp
->logger
, LOGGER_INFO
, "TCP socket closed");
451 } else if (ret
== -1) {
452 /* FIXME: Error happened */
453 logger_log(raop_rtp
->logger
, LOGGER_INFO
, "Error in recv");
458 /* Check that we have enough bytes */
462 if (packet
[0] != '$' || packet
[1] != '\0') {
463 /* FIXME: Incorrect RTP magic bytes */
466 rtplen
= (packet
[2] << 8) | packet
[3];
467 if (rtplen
> sizeof(packet
)) {
468 /* FIXME: Too long packet */
469 logger_log(raop_rtp
->logger
, LOGGER_INFO
, "Error, packet too long %d", rtplen
);
472 if (packetlen
< 4+rtplen
) {
476 /* Packet is valid, process it */
477 ret
= raop_buffer_queue(raop_rtp
->buffer
, packet
+4, rtplen
, 0);
480 /* Remove processed bytes from packet buffer */
481 memmove(packet
, packet
+4+rtplen
, packetlen
-rtplen
);
482 packetlen
-= 4+rtplen
;
484 /* Decode the received frame */
485 if ((audiobuf
= raop_buffer_dequeue(raop_rtp
->buffer
, &audiobuflen
, 1))) {
486 raop_rtp
->callbacks
.audio_process(raop_rtp
->callbacks
.cls
, cb_data
, audiobuf
, audiobuflen
);
491 /* Close the stream file descriptor */
492 if (stream_fd
!= -1) {
493 closesocket(stream_fd
);
496 logger_log(raop_rtp
->logger
, LOGGER_INFO
, "Exiting TCP RAOP thread");
497 raop_rtp
->callbacks
.audio_destroy(raop_rtp
->callbacks
.cls
, cb_data
);
503 raop_rtp_start(raop_rtp_t
*raop_rtp
, int use_udp
, unsigned short control_rport
, unsigned short timing_rport
,
504 unsigned short *control_lport
, unsigned short *timing_lport
, unsigned short *data_lport
)
510 MUTEX_LOCK(raop_rtp
->run_mutex
);
511 if (raop_rtp
->running
|| !raop_rtp
->joined
) {
512 MUTEX_UNLOCK(raop_rtp
->run_mutex
);
516 /* Initialize ports and sockets */
517 raop_rtp
->control_rport
= control_rport
;
518 raop_rtp
->timing_rport
= timing_rport
;
519 if (raop_rtp
->remote_saddr
.ss_family
== AF_INET6
) {
522 if (raop_rtp_init_sockets(raop_rtp
, use_ipv6
, use_udp
) < 0) {
523 logger_log(raop_rtp
->logger
, LOGGER_INFO
, "Initializing sockets failed");
524 MUTEX_UNLOCK(raop_rtp
->run_mutex
);
527 if (control_lport
) *control_lport
= raop_rtp
->control_lport
;
528 if (timing_lport
) *timing_lport
= raop_rtp
->timing_lport
;
529 if (data_lport
) *data_lport
= raop_rtp
->data_lport
;
531 /* Create the thread and initialize running values */
532 raop_rtp
->running
= 1;
533 raop_rtp
->joined
= 0;
535 THREAD_CREATE(raop_rtp
->thread
, raop_rtp_thread_udp
, raop_rtp
);
537 THREAD_CREATE(raop_rtp
->thread
, raop_rtp_thread_tcp
, raop_rtp
);
539 MUTEX_UNLOCK(raop_rtp
->run_mutex
);
543 raop_rtp_set_volume(raop_rtp_t
*raop_rtp
, float volume
)
549 } else if (volume
< -144.0f
) {
553 /* Set volume in thread instead */
554 MUTEX_LOCK(raop_rtp
->run_mutex
);
555 raop_rtp
->volume
= volume
;
556 MUTEX_UNLOCK(raop_rtp
->run_mutex
);
560 raop_rtp_flush(raop_rtp_t
*raop_rtp
, int next_seq
)
564 /* Call flush in thread instead */
565 MUTEX_LOCK(raop_rtp
->run_mutex
);
566 raop_rtp
->flush
= next_seq
;
567 MUTEX_UNLOCK(raop_rtp
->run_mutex
);
571 raop_rtp_stop(raop_rtp_t
*raop_rtp
)
575 /* Check that we are running and thread is not
576 * joined (should never be while still running) */
577 MUTEX_LOCK(raop_rtp
->run_mutex
);
578 if (!raop_rtp
->running
|| raop_rtp
->joined
) {
579 MUTEX_UNLOCK(raop_rtp
->run_mutex
);
582 raop_rtp
->running
= 0;
583 MUTEX_UNLOCK(raop_rtp
->run_mutex
);
585 /* Join the thread */
586 THREAD_JOIN(raop_rtp
->thread
);
587 if (raop_rtp
->csock
!= -1) closesocket(raop_rtp
->csock
);
588 if (raop_rtp
->tsock
!= -1) closesocket(raop_rtp
->tsock
);
589 if (raop_rtp
->dsock
!= -1) closesocket(raop_rtp
->dsock
);
591 /* Flush buffer into initial state */
592 raop_buffer_flush(raop_rtp
->buffer
, -1);
594 /* Mark thread as joined */
595 MUTEX_LOCK(raop_rtp
->run_mutex
);
596 raop_rtp
->joined
= 1;
597 MUTEX_UNLOCK(raop_rtp
->run_mutex
);