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/* $Id$ */
/***
This file is part of polypaudio.
polypaudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
polypaudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with polypaudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <assert.h>
#include <time.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <polypcore/util.h>
#include <polypcore/log.h>
#include <polypcore/xmalloc.h>
#include "sap.h"
pa_sap_context* pa_sap_context_init_send(pa_sap_context *c, int fd, char *sdp_data) {
assert(c);
assert(fd >= 0);
assert(sdp_data);
c->fd = fd;
c->sdp_data = sdp_data;
c->msg_id_hash = (uint16_t) (rand()*rand());
return c;
}
void pa_sap_context_destroy(pa_sap_context *c) {
assert(c);
close(c->fd);
pa_xfree(c->sdp_data);
}
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);
struct iovec iov[4];
struct msghdr m;
int k;
if (getsockname(c->fd, sa, &salen) < 0) {
pa_log("getsockname() failed: %s\n", strerror(errno));
return -1;
}
assert(sa->sa_family == AF_INET || sa->sa_family == AF_INET6);
header = htonl(((uint32_t) 1 << 29) |
(sa->sa_family == AF_INET6 ? (uint32_t) 1 << 28 : 0) |
(goodbye ? (uint32_t) 1 << 26 : 0) |
(c->msg_id_hash));
iov[0].iov_base = &header;
iov[0].iov_len = sizeof(header);
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[3].iov_base = c->sdp_data;
iov[3].iov_len = strlen(c->sdp_data);
m.msg_name = NULL;
m.msg_namelen = 0;
m.msg_iov = iov;
m.msg_iovlen = 4;
m.msg_control = NULL;
m.msg_controllen = 0;
m.msg_flags = 0;
if ((k = sendmsg(c->fd, &m, MSG_DONTWAIT)) < 0)
pa_log("sendmsg() failed: %s\n", strerror(errno));
return k;
}
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