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* add RTP/SAP/SDP reciever module

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* use server cookie as RTP SSRC
* enable SVN keywords
* add new option "loop" for RTP sender module


git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@716 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2006-04-16 00:16:53 +00:00
parent 1fec416db7
commit f1ddf05236
9 changed files with 1012 additions and 53 deletions
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116
src/modules/rtp/sap.c
View file

@ -32,12 +32,16 @@
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <polypcore/util.h>
#include <polypcore/log.h>
#include <polypcore/xmalloc.h>
#include "sap.h"
#include "sdp.h"
#define MIME_TYPE "application/sdp"
pa_sap_context* pa_sap_context_init_send(pa_sap_context *c, int fd, char *sdp_data) {
assert(c);
@ -60,7 +64,6 @@ void pa_sap_context_destroy(pa_sap_context *c) {
int pa_sap_send(pa_sap_context *c, int goodbye) {
uint32_t header;
const char mime[] = "application/sdp";
struct sockaddr_storage sa_buf;
struct sockaddr *sa = (struct sockaddr*) &sa_buf;
socklen_t salen = sizeof(sa_buf);
@ -86,8 +89,8 @@ int pa_sap_send(pa_sap_context *c, int goodbye) {
iov[1].iov_base = sa->sa_family == AF_INET ? (void*) &((struct sockaddr_in*) sa)->sin_addr : (void*) &((struct sockaddr_in6*) sa)->sin6_addr;
iov[1].iov_len = sa->sa_family == AF_INET ? 4 : 16;
iov[2].iov_base = (char*) mime;
iov[2].iov_len = sizeof(mime);
iov[2].iov_base = (char*) MIME_TYPE;
iov[2].iov_len = sizeof(MIME_TYPE);
iov[3].iov_base = c->sdp_data;
iov[3].iov_len = strlen(c->sdp_data);
@ -105,3 +108,110 @@ int pa_sap_send(pa_sap_context *c, int goodbye) {
return k;
}
pa_sap_context* pa_sap_context_init_recv(pa_sap_context *c, int fd) {
assert(c);
assert(fd >= 0);
c->fd = fd;
c->sdp_data = NULL;
return c;
}
int pa_sap_recv(pa_sap_context *c, int *goodbye) {
struct msghdr m;
struct iovec iov;
int size, k;
char *buf = NULL, *e;
uint32_t header;
int six, ac;
ssize_t r;
assert(c);
assert(goodbye);
if (ioctl(c->fd, FIONREAD, &size) < 0) {
pa_log(__FILE__": FIONREAD failed: %s", strerror(errno));
goto fail;
}
if (!size)
return 0;
buf = pa_xnew(char, size+1);
buf[size] = 0;
iov.iov_base = buf;
iov.iov_len = size;
m.msg_name = NULL;
m.msg_namelen = 0;
m.msg_iov = &iov;
m.msg_iovlen = 1;
m.msg_control = NULL;
m.msg_controllen = 0;
m.msg_flags = 0;
if ((r = recvmsg(c->fd, &m, 0)) != size) {
pa_log(__FILE__": recvmsg() failed: %s", r < 0 ? strerror(errno) : "size mismatch");
goto fail;
}
if (size < 4) {
pa_log(__FILE__": SAP packet too short.");
goto fail;
}
memcpy(&header, buf, sizeof(uint32_t));
header = ntohl(header);
if (header >> 29 != 1) {
pa_log(__FILE__": Unsupported SAP version.");
goto fail;
}
if ((header >> 25) & 1) {
pa_log(__FILE__": Encrypted SAP not supported.");
goto fail;
}
if ((header >> 24) & 1) {
pa_log(__FILE__": Compressed SAP not supported.");
goto fail;
}
six = (header >> 28) & 1;
ac = (header >> 16) & 0xFF;
k = 4 + (six ? 16 : 4) + ac*4;
if (size < k) {
pa_log(__FILE__": SAP packet too short (AD).");
goto fail;
}
e = buf + k;
size -= k;
if ((unsigned) size >= sizeof(MIME_TYPE) && !strcmp(e, MIME_TYPE)) {
e += sizeof(MIME_TYPE);
size -= sizeof(MIME_TYPE);
} else if ((unsigned) size < sizeof(PA_SDP_HEADER)-1 || strncmp(e, PA_SDP_HEADER, sizeof(PA_SDP_HEADER)-1)) {
pa_log(__FILE__": Invalid SDP header.");
goto fail;
}
if (c->sdp_data)
pa_xfree(c->sdp_data);
c->sdp_data = pa_xstrndup(e, size);
pa_xfree(buf);
*goodbye = !!((header >> 26) & 1);
return 0;
fail:
pa_xfree(buf);
return -1;
}