2 This file is part of PulseAudio.
4 Copyright 2006 Lennart Poettering
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
28 #include <sys/types.h>
29 #include <sys/socket.h>
30 #include <netinet/in.h>
31 #include <arpa/inet.h>
34 #include <pulse/xmalloc.h>
35 #include <pulse/util.h>
37 #include <pulsecore/core-util.h>
38 #include <pulsecore/log.h>
39 #include <pulsecore/macro.h>
44 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) {
46 char buf_src[64], buf_dst[64], un[64];
53 pa_assert(af == AF_INET || af == AF_INET6);
55 pa_assert(af == AF_INET);
58 pa_assert_se(f = pa_rtp_format_to_string(ss->format));
60 if (!(u = pa_get_user_name(un, sizeof(un))))
63 ntp = (uint32_t) time(NULL) + 2208988800U;
65 pa_assert_se(inet_ntop(af, src, buf_src, sizeof(buf_src)));
66 pa_assert_se(inet_ntop(af, dst, buf_dst, sizeof(buf_dst)));
68 return pa_sprintf_malloc(
70 "o=%s %lu 0 IN %s %s\n"
75 "m=audio %u RTP/AVP %i\n"
76 "a=rtpmap:%i %s/%u/%u\n"
78 u, (unsigned long) ntp, af == AF_INET ? "IP4" : "IP6", buf_src,
80 af == AF_INET ? "IP4" : "IP6", buf_dst,
83 payload, f, ss->rate, ss->channels);
86 static pa_sample_spec *parse_sdp_sample_spec(pa_sample_spec *ss, char *c) {
87 unsigned rate, channels;
91 if (pa_startswith(c, "L16/")) {
92 ss->format = PA_SAMPLE_S16BE;
94 } else if (pa_startswith(c, "L8/")) {
95 ss->format = PA_SAMPLE_U8;
97 } else if (pa_startswith(c, "PCMA/")) {
98 ss->format = PA_SAMPLE_ALAW;
100 } else if (pa_startswith(c, "PCMU/")) {
101 ss->format = PA_SAMPLE_ULAW;
106 if (sscanf(c, "%u/%u", &rate, &channels) == 2) {
107 ss->rate = (uint32_t) rate;
108 ss->channels = (uint8_t) channels;
109 } else if (sscanf(c, "%u", &rate) == 2) {
110 ss->rate = (uint32_t) rate;
115 if (!pa_sample_spec_valid(ss))
121 pa_sdp_info *pa_sdp_parse(const char *t, pa_sdp_info *i, int is_goodbye) {
123 pa_bool_t ss_valid = FALSE;
128 i->origin = i->session_name = NULL;
132 if (!pa_startswith(t, PA_SDP_HEADER)) {
133 pa_log("Failed to parse SDP data: invalid header.");
137 t += sizeof(PA_SDP_HEADER)-1;
142 l = strcspn(t, "\n");
145 pa_log("Failed to parse SDP data: line too short: >%s<.", t);
149 if (pa_startswith(t, "o="))
150 i->origin = pa_xstrndup(t+2, l-2);
151 else if (pa_startswith(t, "s="))
152 i->session_name = pa_xstrndup(t+2, l-2);
153 else if (pa_startswith(t, "c=IN IP4 ")) {
157 k = l-8 > sizeof(a) ? sizeof(a) : l-8;
159 pa_strlcpy(a, t+9, k);
160 a[strcspn(a, "/")] = 0;
162 if (inet_pton(AF_INET, a, &((struct sockaddr_in*) &i->sa)->sin_addr) <= 0) {
163 pa_log("Failed to parse SDP data: bad address: >%s<.", a);
167 ((struct sockaddr_in*) &i->sa)->sin_family = AF_INET;
168 ((struct sockaddr_in*) &i->sa)->sin_port = 0;
169 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);
189 } else if (pa_startswith(t, "m=audio ")) {
191 if (i->payload > 127) {
194 if (sscanf(t+8, "%i RTP/AVP %i", &_port, &_payload) == 2) {
196 if (_port <= 0 || _port > 0xFFFF) {
197 pa_log("Failed to parse SDP data: invalid port %i.", _port);
201 if (_payload < 0 || _payload > 127) {
202 pa_log("Failed to parse SDP data: invalid payload %i.", _payload);
206 port = (uint16_t) _port;
207 i->payload = (uint8_t) _payload;
209 if (pa_rtp_sample_spec_from_payload(i->payload, &i->sample_spec))
213 } else if (pa_startswith(t, "a=rtpmap:")) {
215 if (i->payload <= 127) {
219 if (sscanf(t+9, "%i %64c", &_payload, c) == 2) {
221 if (_payload < 0 || _payload > 127) {
222 pa_log("Failed to parse SDP data: invalid payload %i.", _payload);
225 if (_payload == i->payload) {
227 c[strcspn(c, "\n")] = 0;
229 if (parse_sdp_sample_spec(&i->sample_spec, c))
242 if (!i->origin || (!is_goodbye && (!i->salen || i->payload > 127 || !ss_valid || port == 0))) {
243 pa_log("Failed to parse SDP data: missing data.");
247 if (((struct sockaddr*) &i->sa)->sa_family == AF_INET)
248 ((struct sockaddr_in*) &i->sa)->sin_port = htons(port);
250 ((struct sockaddr_in6*) &i->sa)->sin6_port = htons(port);
256 pa_xfree(i->session_name);
261 void pa_sdp_info_destroy(pa_sdp_info *i) {
265 pa_xfree(i->session_name);