free(ut);
}
+/**
+ * Perform AF-independent multicast sender setup.
+ *
+ * \param fd The connected socket descriptor.
+ * \param ttl UDPv4 multicast TTL or UDPv6 multicast number of hops.
+ * Use -1 to mean default, 0..255 otherwise.
+ * \param iface The outgoing multicast interface, or NULL for the default.
+ *
+ * \return Zero if okay, negative on error.
+ */
+static int mcast_sender_setup(struct udp_target *ut, int ttl, char *iface)
+{
+ struct sockaddr_storage ss;
+ socklen_t sslen = sizeof(ss);
+
+ const int on = 1;
+ int id = iface == NULL ? 0 : if_nametoindex(iface);
+
+ if (getpeername(ut->fd, (struct sockaddr *)&ss, &sslen) < 0)
+ goto err;
+
+ if (iface != NULL && id == 0)
+ PARA_WARNING_LOG("could not resolve interface %s, using default", iface);
+
+ /* RFC 3493, 5.2: -1 means 'use kernel default' */
+ if (ttl < 0 || ttl > 255)
+ ttl = -1;
+
+ switch (ss.ss_family) {
+ case AF_INET:
+ if (!IN_MULTICAST(htonl(((struct sockaddr_in *)&ss)->sin_addr.s_addr)))
+ return 0;
+ if (id != 0) {
+#ifdef HAVE_IP_MREQN
+ struct ip_mreqn mn;
+
+ memset(&mn, 0, sizeof(mn));
+ mn.imr_ifindex = id;
+ if (setsockopt(ut->fd, IPPROTO_IP, IP_MULTICAST_IF, &mn, sizeof(mn)) < 0)
+ goto err;
+#else
+ PARA_ERROR_LOG("No support for setting outgoing IPv4 mcast interface.");
+#endif
+ }
+ /*
+ * Enable receiving multicast messages generated on the local host
+ * At least on Linux, this is enabled by default.
+ */
+ if (setsockopt(ut->fd, IPPROTO_IP, IP_MULTICAST_LOOP, &on, sizeof(on)) < 0)
+ break;
+
+ /* Default: use local subnet (do not flood out into the WAN) */
+ if (ttl == -1)
+ ttl = 1;
+ if (setsockopt(ut->fd, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl)) < 0)
+ break;
+ return 0;
+ case AF_INET6:
+ if (!IN6_IS_ADDR_MULTICAST(&((struct sockaddr_in6 *)&ss)->sin6_addr))
+ return 0;
+ if (id != 0 &&
+ setsockopt(ut->fd, IPPROTO_IPV6, IPV6_MULTICAST_IF, &id, sizeof(id)) < 0)
+ break;
+ if (setsockopt(ut->fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, &on, sizeof(on)) < 0)
+ break;
+ if (setsockopt(ut->fd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &ttl, sizeof(ttl)) < 0)
+ break;
+ return 0;
+ default:
+ PARA_ERROR_LOG("address family %d not supported", ss.ss_family);
+ return -E_ADDRESS_LOOKUP;
+ }
+err:
+ return -ERRNO_TO_PARA_ERROR(errno);
+}
+
+/** The maximal size of the per-target chunk queue. */
+#define UDP_CQ_BYTES 40000
+
+static int udp_init_session(struct udp_target *ut)
+{
+ int ret;
+ char *iface = NULL;
+
+ if (ut->fd >= 0) /* nothing to do */
+ return 0;
+
+ ret = makesock(AF_UNSPEC, IPPROTO_UDP, 0, TARGET_ADDR(ut), ut->port);
+ if (ret < 0)
+ return ret;
+ ut->fd = ret;
+
+ if (conf.udp_mcast_iface_given)
+ iface = conf.udp_mcast_iface_arg;
+
+ ret = mcast_sender_setup(ut, conf.udp_ttl_arg, iface);
+ if (ret < 0) {
+ close(ut->fd);
+ return ret;
+ }
+
+ ret = mark_fd_nonblocking(ut->fd);
+ if (ret < 0) {
+ close(ut->fd);
+ return ret;
+ }
+ add_close_on_fork_list(ut->fd);
+ ut->cq = cq_new(UDP_CQ_BYTES);
+ PARA_NOTICE_LOG("sending to udp %s:%d\n", TARGET_ADDR(ut), ut->port);
+ return 1;
+}
+
static void udp_send_buf(char *buf, size_t len)
{
struct udp_target *ut, *tmp;
int ret;
list_for_each_entry_safe(ut, tmp, &targets, node) {
- if (ut->fd < 0)
+ ret = udp_init_session(ut);
+ if (ret < 0) {
+ udp_delete_target(ut, para_strerror(-ret));
continue;
+ }
ret = send_queued_chunks(ut->fd, ut->cq, 0);
if (ret < 0) {
udp_delete_target(ut, para_strerror(-ret));
}
}
-#define UDP_CQ_BYTES 40000
-
-static int udp_init_session(struct udp_target *ut)
-{
- int ret;
-
- if (ut->fd >= 0) /* nothing to do */
- return 0;
- PARA_NOTICE_LOG("sending to udp %s:%d\n", TARGET_ADDR(ut), ut->port);
- ret = create_udp_send_socket(TARGET_ADDR(ut), ut->port,
- conf.udp_ttl_arg);
- if (ret < 0)
- return ret;
- ut->fd = ret;
- ret = mark_fd_nonblocking(ut->fd);
- if (ret < 0) {
- close(ut->fd);
- return ret;
- }
- add_close_on_fork_list(ut->fd);
- ut->cq = cq_new(UDP_CQ_BYTES);
- return 1;
-}
-
static void udp_shutdown_targets(void)
{
char buf[UDP_AUDIO_HEADER_LEN];
struct udp_target *ut, *tmp;
+ struct udp_audio_header uah = {
+ .stream_type = UDP_UNKNOWN_STREAM,
+ .packet_type = UDP_EOF_PACKET,
+ };
- udp_write_packet_type(buf, UDP_EOF_PACKET);
- udp_write_magic(buf);
+ write_udp_audio_header(buf, &uah);
list_for_each_entry_safe(ut, tmp, &targets, node) {
if (ut->fd < 0)
continue;
const char *buf, size_t len, const char *header_buf,
size_t header_len)
{
- struct udp_target *ut, *tmp;
- size_t sendbuf_len;
- uint8_t packet_type = UDP_DATA_PACKET;
- int ret;
char *sendbuf;
+ size_t sendbuf_len;
struct timeval *chunk_tv;
- uint8_t stream_type = header_len? UDP_HEADER_STREAM : UDP_PLAIN_STREAM;
+ struct udp_audio_header uah;
-// PARA_NOTICE_LOG("header_len: %zd, header_buf: %p\n", header_len,
-// header_buf);
+// PARA_NOTICE_LOG("len: %zd, header_len: %zd\n", len, header_len);
if (sender_status != SENDER_ON)
return;
return;
if (list_empty(&targets))
return;
- list_for_each_entry_safe(ut, tmp, &targets, node) {
- ret = udp_init_session(ut);
- if (ret < 0)
- udp_delete_target(ut, para_strerror(-ret));
- }
- if (!need_extra_header(current_chunk))
- header_len = 0;
+ uah.stream_type = header_len? UDP_HEADER_STREAM : UDP_PLAIN_STREAM;
+ uah.header_len = need_extra_header(current_chunk)? header_len : 0;
if (!current_chunk)
- packet_type = UDP_BOF_PACKET;
- else if (header_len)
- packet_type = UDP_HEADER_PACKET;
- sendbuf_len = UDP_AUDIO_HEADER_LEN + header_len + len;
+ uah.packet_type = UDP_BOF_PACKET;
+ else if (uah.header_len)
+ uah.packet_type = UDP_HEADER_PACKET;
+ else
+ uah.packet_type = UDP_DATA_PACKET;
+ uah.payload_len = uah.header_len + len;
+ sendbuf_len = UDP_AUDIO_HEADER_LEN + uah.payload_len;
sendbuf = para_malloc(sendbuf_len);
- udp_write_magic(sendbuf);
- udp_write_stream_type(sendbuf, stream_type);
- udp_write_packet_type(sendbuf, packet_type);
- udp_write_header_len(sendbuf, header_len);
- if (header_len)
+ write_udp_audio_header(sendbuf, &uah);
+ if (uah.header_len)
memcpy(sendbuf + UDP_AUDIO_HEADER_LEN, header_buf,
- header_len);
- memcpy(sendbuf + UDP_AUDIO_HEADER_LEN + header_len, buf, len);
+ uah.header_len);
+ memcpy(sendbuf + UDP_AUDIO_HEADER_LEN + uah.header_len, buf, len);
udp_send_buf(sendbuf, sendbuf_len);
free(sendbuf);
}
projects / paraslash.git / blobdiff