2 This file is part of PulseAudio.
4 Copyright 2008 Colin Guthrie
6 PulseAudio is free software; you can redistribute it and/or modify
7 it under the terms of the GNU Lesser General Public License as published
8 by the Free Software Foundation; either version 2.1 of the License,
9 or (at your option) any later version.
11 PulseAudio is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with PulseAudio; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
30 #include <arpa/inet.h>
32 #include <sys/ioctl.h>
34 #ifdef HAVE_SYS_FILIO_H
35 #include <sys/filio.h>
38 #include <pulse/xmalloc.h>
40 #include <pulsecore/core-error.h>
41 #include <pulsecore/core-util.h>
42 #include <pulsecore/socket-util.h>
43 #include <pulsecore/log.h>
44 #include <pulsecore/macro.h>
45 #include <pulsecore/strbuf.h>
46 #include <pulsecore/ioline.h>
51 #include <pulsecore/poll.h>
54 #include "rtsp_client.h"
56 struct pa_rtsp_client {
57 pa_mainloop_api *mainloop;
65 pa_rtsp_cb_t callback;
68 const char *useragent;
73 pa_headerlist* headers;
75 pa_strbuf *header_buffer;
76 pa_headerlist* response_headers;
86 pa_rtsp_client* pa_rtsp_client_new(pa_mainloop_api *mainloop, const char* hostname, uint16_t port, const char* useragent) {
93 c = pa_xnew0(pa_rtsp_client, 1);
94 c->mainloop = mainloop;
95 c->hostname = pa_xstrdup(hostname);
97 c->headers = pa_headerlist_new();
100 c->useragent = useragent;
102 c->useragent = "PulseAudio RTSP Client";
108 void pa_rtsp_client_free(pa_rtsp_client* c) {
112 pa_socket_client_unref(c->sc);
114 pa_ioline_close(c->ioline);
116 pa_iochannel_free(c->io);
118 pa_xfree(c->hostname);
120 pa_xfree(c->localip);
121 pa_xfree(c->session);
122 pa_xfree(c->transport);
123 pa_xfree(c->last_header);
124 if (c->header_buffer)
125 pa_strbuf_free(c->header_buffer);
126 if (c->response_headers)
127 pa_headerlist_free(c->response_headers);
128 pa_headerlist_free(c->headers);
134 static void headers_read(pa_rtsp_client *c) {
136 char delimiters[] = ";";
139 pa_assert(c->response_headers);
140 pa_assert(c->callback);
142 /* Deal with a SETUP response */
143 if (STATE_SETUP == c->state) {
144 const char* token_state = NULL;
145 const char* pc = NULL;
146 c->session = pa_xstrdup(pa_headerlist_gets(c->response_headers, "Session"));
147 c->transport = pa_xstrdup(pa_headerlist_gets(c->response_headers, "Transport"));
149 if (!c->session || !c->transport) {
150 pa_log("Invalid SETUP response.");
154 /* Now parse out the server port component of the response. */
155 while ((token = pa_split(c->transport, delimiters, &token_state))) {
156 if ((pc = strstr(token, "="))) {
157 if (0 == strncmp(token, "server_port", 11)) {
158 pa_atou(pc+1, (uint32_t*)(&c->rtp_port));
165 if (0 == c->rtp_port) {
166 /* Error no server_port in response */
167 pa_log("Invalid SETUP response (no port number).");
172 /* Call our callback */
173 c->callback(c, c->state, c->response_headers, c->userdata);
177 static void line_callback(pa_ioline *line, const char *s, void *userdata) {
181 pa_rtsp_client *c = userdata;
184 pa_assert(c->callback);
187 /* Keep the ioline/iochannel open as they will be freed automatically */
190 c->callback(c, STATE_DISCONNECTED, NULL, c->userdata);
195 /* Trim trailing carriage returns */
196 s2p = s2 + strlen(s2) - 1;
197 while (s2p >= s2 && '\r' == *s2p) {
201 if (c->waiting && 0 == strcmp("RTSP/1.0 200 OK", s2)) {
203 if (c->response_headers)
204 pa_headerlist_free(c->response_headers);
205 c->response_headers = pa_headerlist_new();
209 pa_log_warn("Unexpected response: %s", s2);
214 /* We will have a header left from our looping iteration, so add it in :) */
215 if (c->last_header) {
216 /* This is not a continuation header so let's dump it into our proplist */
217 pa_headerlist_puts(c->response_headers, c->last_header, pa_strbuf_tostring_free(c->header_buffer));
218 pa_xfree(c->last_header);
219 c->last_header = NULL;
220 c->header_buffer= NULL;
223 pa_log_debug("Full response received. Dispatching");
229 /* Read and parse a header (we know it's not empty) */
230 /* TODO: Move header reading into the headerlist. */
232 /* If the first character is a space, it's a continuation header */
233 if (c->last_header && ' ' == s2[0]) {
234 pa_assert(c->header_buffer);
236 /* Add this line to the buffer (sans the space. */
237 pa_strbuf_puts(c->header_buffer, &(s2[1]));
241 if (c->last_header) {
242 /* This is not a continuation header so let's dump the full
243 header/value into our proplist */
244 pa_headerlist_puts(c->response_headers, c->last_header, pa_strbuf_tostring_free(c->header_buffer));
245 pa_xfree(c->last_header);
246 c->last_header = NULL;
247 c->header_buffer = NULL;
250 delimpos = strstr(s2, ":");
252 pa_log_warn("Unexpected response when expecting header: %s", s);
256 pa_assert(!c->header_buffer);
257 pa_assert(!c->last_header);
259 c->header_buffer = pa_strbuf_new();
260 if (strlen(delimpos) > 1) {
261 /* Cut our line off so we can copy the header name out */
264 /* Trim the front of any spaces */
265 while (' ' == *delimpos)
268 pa_strbuf_puts(c->header_buffer, delimpos);
270 /* Cut our line off so we can copy the header name out */
274 /* Save the header name */
275 c->last_header = pa_xstrdup(s2);
281 static void on_connection(pa_socket_client *sc, pa_iochannel *io, void *userdata) {
282 pa_rtsp_client *c = userdata;
285 struct sockaddr_in in;
286 struct sockaddr_in6 in6;
288 socklen_t sa_len = sizeof(sa);
292 pa_assert(STATE_CONNECT == c->state);
293 pa_assert(c->sc == sc);
294 pa_socket_client_unref(c->sc);
298 pa_log("Connection failed: %s", pa_cstrerror(errno));
304 c->ioline = pa_ioline_new(io);
305 pa_ioline_set_callback(c->ioline, line_callback, c);
307 /* Get the local IP address for use externally */
308 if (0 == getsockname(pa_iochannel_get_recv_fd(io), &sa.sa, &sa_len)) {
309 char buf[INET6_ADDRSTRLEN];
310 const char *res = NULL;
312 if (AF_INET == sa.sa.sa_family) {
313 if ((res = inet_ntop(sa.sa.sa_family, &sa.in.sin_addr, buf, sizeof(buf)))) {
314 c->localip = pa_xstrdup(res);
316 } else if (AF_INET6 == sa.sa.sa_family) {
317 if ((res = inet_ntop(AF_INET6, &sa.in6.sin6_addr, buf, sizeof(buf)))) {
318 c->localip = pa_sprintf_malloc("[%s]", res);
322 pa_log_debug("Established RTSP connection from local ip %s", c->localip);
325 c->callback(c, c->state, NULL, c->userdata);
328 int pa_rtsp_connect(pa_rtsp_client *c) {
332 pa_xfree(c->session);
335 if (!(c->sc = pa_socket_client_new_string(c->mainloop, c->hostname, c->port))) {
336 pa_log("failed to connect to server '%s:%d'", c->hostname, c->port);
340 pa_socket_client_set_callback(c->sc, on_connection, c);
342 c->state = STATE_CONNECT;
346 void pa_rtsp_set_callback(pa_rtsp_client *c, pa_rtsp_cb_t callback, void *userdata) {
349 c->callback = callback;
350 c->userdata = userdata;
353 void pa_rtsp_disconnect(pa_rtsp_client *c) {
357 pa_ioline_close(c->ioline);
359 pa_iochannel_free(c->io);
365 const char* pa_rtsp_localip(pa_rtsp_client* c) {
371 uint32_t pa_rtsp_serverport(pa_rtsp_client* c) {
377 void pa_rtsp_set_url(pa_rtsp_client* c, const char* url) {
380 c->url = pa_xstrdup(url);
383 void pa_rtsp_add_header(pa_rtsp_client *c, const char* key, const char* value)
389 pa_headerlist_puts(c->headers, key, value);
392 void pa_rtsp_remove_header(pa_rtsp_client *c, const char* key)
397 pa_headerlist_remove(c->headers, key);
400 static int rtsp_exec(pa_rtsp_client* c, const char* cmd,
401 const char* content_type, const char* content,
403 pa_headerlist* headers) {
414 pa_log_debug("Sending command: %s", cmd);
416 buf = pa_strbuf_new();
417 pa_strbuf_printf(buf, "%s %s RTSP/1.0\r\nCSeq: %d\r\n", cmd, c->url, ++c->cseq);
419 pa_strbuf_printf(buf, "Session: %s\r\n", c->session);
421 /* Add the headers */
423 hdrs = pa_headerlist_to_string(headers);
424 pa_strbuf_puts(buf, hdrs);
428 if (content_type && content) {
429 pa_strbuf_printf(buf, "Content-Type: %s\r\nContent-Length: %d\r\n",
430 content_type, (int)strlen(content));
433 pa_strbuf_printf(buf, "User-Agent: %s\r\n", c->useragent);
436 hdrs = pa_headerlist_to_string(c->headers);
437 pa_strbuf_puts(buf, hdrs);
441 pa_strbuf_puts(buf, "\r\n");
443 if (content_type && content) {
444 pa_strbuf_puts(buf, content);
447 /* Our packet is created... now we can send it :) */
448 hdrs = pa_strbuf_tostring_free(buf);
449 /*pa_log_debug("Submitting request:");
450 pa_log_debug(hdrs);*/
451 l = pa_iochannel_write(c->io, hdrs, strlen(hdrs));
458 int pa_rtsp_announce(pa_rtsp_client *c, const char* sdp) {
463 c->state = STATE_ANNOUNCE;
464 return rtsp_exec(c, "ANNOUNCE", "application/sdp", sdp, 1, NULL);
468 int pa_rtsp_setup(pa_rtsp_client* c) {
469 pa_headerlist* headers;
474 headers = pa_headerlist_new();
475 pa_headerlist_puts(headers, "Transport", "RTP/AVP/TCP;unicast;interleaved=0-1;mode=record");
477 c->state = STATE_SETUP;
478 rv = rtsp_exec(c, "SETUP", NULL, NULL, 1, headers);
479 pa_headerlist_free(headers);
484 int pa_rtsp_record(pa_rtsp_client* c, uint16_t* seq, uint32_t* rtptime) {
485 pa_headerlist* headers;
491 /* No session in progress */
495 /* Todo: Generate these values randomly as per spec */
498 headers = pa_headerlist_new();
499 pa_headerlist_puts(headers, "Range", "npt=0-");
500 info = pa_sprintf_malloc("seq=%u;rtptime=%u", *seq, *rtptime);
501 pa_headerlist_puts(headers, "RTP-Info", info);
504 c->state = STATE_RECORD;
505 rv = rtsp_exec(c, "RECORD", NULL, NULL, 1, headers);
506 pa_headerlist_free(headers);
511 int pa_rtsp_teardown(pa_rtsp_client *c) {
514 c->state = STATE_TEARDOWN;
515 return rtsp_exec(c, "TEARDOWN", NULL, NULL, 0, NULL);
519 int pa_rtsp_setparameter(pa_rtsp_client *c, const char* param) {
524 c->state = STATE_SET_PARAMETER;
525 return rtsp_exec(c, "SET_PARAMETER", "text/parameters", param, 1, NULL);
529 int pa_rtsp_flush(pa_rtsp_client *c, uint16_t seq, uint32_t rtptime) {
530 pa_headerlist* headers;
536 headers = pa_headerlist_new();
537 info = pa_sprintf_malloc("seq=%u;rtptime=%u", seq, rtptime);
538 pa_headerlist_puts(headers, "RTP-Info", info);
541 c->state = STATE_FLUSH;
542 rv = rtsp_exec(c, "FLUSH", NULL, NULL, 1, headers);
543 pa_headerlist_free(headers);