4 This file is part of PulseAudio.
6 Copyright 2006 Lennart Poettering
8 PulseAudio is free software; you can redistribute it and/or modify
9 it under the terms of the GNU Lesser General Public License as published
10 by the Free Software Foundation; either version 2 of the License,
11 or (at your option) any later version.
13 PulseAudio is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with PulseAudio; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
31 #include <sys/types.h>
32 #include <sys/socket.h>
33 #include <netinet/in.h>
34 #include <arpa/inet.h>
37 #include <pulse/xmalloc.h>
39 #include <pulsecore/core-util.h>
40 #include <pulsecore/log.h>
46 char *pa_sdp_build(int af, const void *src, const void *dst, const char *name, uint16_t port, uint8_t payload, const pa_sample_spec *ss) {
48 char buf_src[64], buf_dst[64];
49 const char *u, *f, *a;
53 assert(af == AF_INET || af == AF_INET6);
55 f = pa_rtp_format_to_string(ss->format);
58 if (!(u = getenv("USER")))
59 if (!(u = getenv("USERNAME")))
62 ntp = time(NULL) + 2208988800U;
64 a = inet_ntop(af, src, buf_src, sizeof(buf_src));
66 a = inet_ntop(af, dst, buf_dst, sizeof(buf_dst));
69 return pa_sprintf_malloc(
71 "o=%s %lu 0 IN %s %s\n"
76 "m=audio %u RTP/AVP %i\n"
77 "a=rtpmap:%i %s/%u/%u\n"
79 u, (unsigned long) ntp, af == AF_INET ? "IP4" : "IP6", buf_src,
81 af == AF_INET ? "IP4" : "IP6", buf_dst,
84 payload, f, ss->rate, ss->channels);
87 static pa_sample_spec *parse_sdp_sample_spec(pa_sample_spec *ss, char *c) {
88 unsigned rate, channels;
92 if (pa_startswith(c, "L16/")) {
93 ss->format = PA_SAMPLE_S16BE;
95 } else if (pa_startswith(c, "L8/")) {
96 ss->format = PA_SAMPLE_U8;
98 } else if (pa_startswith(c, "PCMA/")) {
99 ss->format = PA_SAMPLE_ALAW;
101 } else if (pa_startswith(c, "PCMU/")) {
102 ss->format = PA_SAMPLE_ULAW;
107 if (sscanf(c, "%u/%u", &rate, &channels) == 2) {
109 ss->channels = channels;
110 } else if (sscanf(c, "%u", &rate) == 2) {
116 if (!pa_sample_spec_valid(ss))
122 pa_sdp_info *pa_sdp_parse(const char *t, pa_sdp_info *i, int is_goodbye) {
129 i->origin = i->session_name = NULL;
133 if (!pa_startswith(t, PA_SDP_HEADER)) {
134 pa_log("Failed to parse SDP data: invalid header.");
138 t += sizeof(PA_SDP_HEADER)-1;
143 l = strcspn(t, "\n");
146 pa_log("Failed to parse SDP data: line too short: >%s<.", t);
150 if (pa_startswith(t, "o="))
151 i->origin = pa_xstrndup(t+2, l-2);
152 else if (pa_startswith(t, "s="))
153 i->session_name = pa_xstrndup(t+2, l-2);
154 else if (pa_startswith(t, "c=IN IP4 ")) {
158 k = l-8 > sizeof(a) ? sizeof(a) : l-8;
160 pa_strlcpy(a, t+9, k);
161 a[strcspn(a, "/")] = 0;
163 if (inet_pton(AF_INET, a, &((struct sockaddr_in*) &i->sa)->sin_addr) <= 0) {
164 pa_log("Failed to parse SDP data: bad address: >%s<.", a);
168 ((struct sockaddr_in*) &i->sa)->sin_family = AF_INET;
169 ((struct sockaddr_in*) &i->sa)->sin_port = 0;
170 i->salen = sizeof(struct sockaddr_in);
171 } else if (pa_startswith(t, "c=IN IP6 ")) {
175 k = l-8 > sizeof(a) ? sizeof(a) : l-8;
177 pa_strlcpy(a, t+9, k);
178 a[strcspn(a, "/")] = 0;
180 if (inet_pton(AF_INET6, a, &((struct sockaddr_in6*) &i->sa)->sin6_addr) <= 0) {
181 pa_log("Failed to parse SDP data: bad address: >%s<.", a);
185 ((struct sockaddr_in6*) &i->sa)->sin6_family = AF_INET6;
186 ((struct sockaddr_in6*) &i->sa)->sin6_port = 0;
187 i->salen = sizeof(struct sockaddr_in6);
188 } else if (pa_startswith(t, "m=audio ")) {
190 if (i->payload > 127) {
193 if (sscanf(t+8, "%i RTP/AVP %i", &_port, &_payload) == 2) {
195 if (_port <= 0 || _port > 0xFFFF) {
196 pa_log("Failed to parse SDP data: invalid port %i.", _port);
200 if (_payload < 0 || _payload > 127) {
201 pa_log("Failed to parse SDP data: invalid payload %i.", _payload);
205 port = (uint16_t) _port;
206 i->payload = (uint8_t) _payload;
208 if (pa_rtp_sample_spec_from_payload(i->payload, &i->sample_spec))
212 } else if (pa_startswith(t, "a=rtpmap:")) {
214 if (i->payload <= 127) {
218 if (sscanf(t+9, "%i %64c", &_payload, c) == 2) {
220 if (_payload < 0 || _payload > 127) {
221 pa_log("Failed to parse SDP data: invalid payload %i.", _payload);
224 if (_payload == i->payload) {
226 c[strcspn(c, "\n")] = 0;
228 if (parse_sdp_sample_spec(&i->sample_spec, c))
241 if (!i->origin || (!is_goodbye && (!i->salen || i->payload > 127 || !ss_valid || port == 0))) {
242 pa_log("Failed to parse SDP data: missing data.");
246 if (((struct sockaddr*) &i->sa)->sa_family == AF_INET)
247 ((struct sockaddr_in*) &i->sa)->sin_port = htons(port);
249 ((struct sockaddr_in6*) &i->sa)->sin6_port = htons(port);
255 pa_xfree(i->session_name);
260 void pa_sdp_info_destroy(pa_sdp_info *i) {
264 pa_xfree(i->session_name);