-/* $Id$ */
-
/***
- This file is part of polypaudio.
-
- polypaudio is free software; you can redistribute it and/or modify
+ This file is part of PulseAudio.
+
+ Copyright 2006 Lennart Poettering
+
+ PulseAudio 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,
+ by the Free Software Foundation; either version 2.1 of the License,
or (at your option) any later version.
-
- polypaudio is distributed in the hope that it will be useful, but
+
+ PulseAudio 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
+ along with PulseAudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#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 <netinet/in.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
+#include <sys/ioctl.h>
+
+#ifdef HAVE_SYS_FILIO_H
+#include <sys/filio.h>
+#endif
+
+#ifdef HAVE_SYS_UIO_H
+#include <sys/uio.h>
+#endif
+
+#include <pulse/xmalloc.h>
-#include <polypcore/util.h>
-#include <polypcore/log.h>
-#include <polypcore/xmalloc.h>
+#include <pulsecore/core-error.h>
+#include <pulsecore/core-util.h>
+#include <pulsecore/log.h>
+#include <pulsecore/macro.h>
+#include <pulsecore/arpa-inet.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);
- assert(fd >= 0);
- assert(sdp_data);
+ pa_assert(c);
+ pa_assert(fd >= 0);
+ pa_assert(sdp_data);
c->fd = fd;
c->sdp_data = sdp_data;
c->msg_id_hash = (uint16_t) (rand()*rand());
-
- return c;
+
+ return c;
}
void pa_sap_context_destroy(pa_sap_context *c) {
- assert(c);
+ pa_assert(c);
- close(c->fd);
+ pa_close(c->fd);
pa_xfree(c->sdp_data);
}
-int pa_sap_send(pa_sap_context *c, int goodbye) {
+int pa_sap_send(pa_sap_context *c, bool 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;
+ ssize_t k;
if (getsockname(c->fd, sa, &salen) < 0) {
- pa_log("getsockname() failed: %s\n", strerror(errno));
+ pa_log("getsockname() failed: %s\n", pa_cstrerror(errno));
return -1;
}
- assert(sa->sa_family == AF_INET || sa->sa_family == AF_INET6);
-
+#ifdef HAVE_IPV6
+ pa_assert(sa->sa_family == AF_INET || sa->sa_family == AF_INET6);
+#else
+ pa_assert(sa->sa_family == AF_INET);
+#endif
+
header = htonl(((uint32_t) 1 << 29) |
+#ifdef HAVE_IPV6
(sa->sa_family == AF_INET6 ? (uint32_t) 1 << 28 : 0) |
+#endif
(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;
+ if (sa->sa_family == AF_INET) {
+ iov[1].iov_base = (void*) &((struct sockaddr_in*) sa)->sin_addr;
+ iov[1].iov_len = 4U;
+#ifdef HAVE_IPV6
+ } else {
+ iov[1].iov_base = (void*) &((struct sockaddr_in6*) sa)->sin6_addr;
+ iov[1].iov_len = 16U;
+#endif
+ }
- 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);
-
+
m.msg_name = NULL;
m.msg_namelen = 0;
m.msg_iov = iov;
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));
+ pa_log_warn("sendmsg() failed: %s\n", pa_cstrerror(errno));
+
+ return (int) k;
+}
+
+pa_sap_context* pa_sap_context_init_recv(pa_sap_context *c, int fd) {
+ pa_assert(c);
+ pa_assert(fd >= 0);
+
+ c->fd = fd;
+ c->sdp_data = NULL;
+ return c;
+}
+
+int pa_sap_recv(pa_sap_context *c, bool *goodbye) {
+ struct msghdr m;
+ struct iovec iov;
+ int size;
+ char *buf = NULL, *e;
+ uint32_t header;
+ unsigned six, ac, k;
+ ssize_t r;
+
+ pa_assert(c);
+ pa_assert(goodbye);
+
+ if (ioctl(c->fd, FIONREAD, &size) < 0) {
+ pa_log_warn("FIONREAD failed: %s", pa_cstrerror(errno));
+ goto fail;
+ }
+
+ buf = pa_xnew(char, (unsigned) size+1);
+ buf[size] = 0;
+
+ iov.iov_base = buf;
+ iov.iov_len = (size_t) 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_warn("recvmsg() failed: %s", r < 0 ? pa_cstrerror(errno) : "size mismatch");
+ goto fail;
+ }
+
+ if (size < 4) {
+ pa_log_warn("SAP packet too short.");
+ goto fail;
+ }
+
+ memcpy(&header, buf, sizeof(uint32_t));
+ header = ntohl(header);
+
+ if (header >> 29 != 1) {
+ pa_log_warn("Unsupported SAP version.");
+ goto fail;
+ }
+
+ if ((header >> 25) & 1) {
+ pa_log_warn("Encrypted SAP not supported.");
+ goto fail;
+ }
+
+ if ((header >> 24) & 1) {
+ pa_log_warn("Compressed SAP not supported.");
+ goto fail;
+ }
+
+ six = (header >> 28) & 1U;
+ ac = (header >> 16) & 0xFFU;
+
+ k = 4 + (six ? 16U : 4U) + ac*4U;
+ if ((unsigned) size < k) {
+ pa_log_warn("SAP packet too short (AD).");
+ goto fail;
+ }
+
+ e = buf + k;
+ size -= (int) k;
+
+ if ((unsigned) size >= sizeof(MIME_TYPE) && pa_streq(e, MIME_TYPE)) {
+ e += sizeof(MIME_TYPE);
+ size -= (int) sizeof(MIME_TYPE);
+ } else if ((unsigned) size < sizeof(PA_SDP_HEADER)-1 || strncmp(e, PA_SDP_HEADER, sizeof(PA_SDP_HEADER)-1)) {
+ pa_log_warn("Invalid SDP header.");
+ goto fail;
+ }
+
+ if (c->sdp_data)
+ pa_xfree(c->sdp_data);
+
+ c->sdp_data = pa_xstrndup(e, (unsigned) size);
+ pa_xfree(buf);
+
+ *goodbye = !!((header >> 26) & 1);
+
+ return 0;
+
+fail:
+ pa_xfree(buf);
- return k;
+ return -1;
}