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module-rtp: for multicast we need to add the TTL

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This commit is contained in:
Wim Taymans 2022-10-07 16:40:04 +02:00
parent c06f936a88
commit 9dd1c78f50
2 changed files with 32 additions and 12 deletions
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42
src/modules/module-rtp-sink.c
View file

@ -396,7 +396,20 @@ static int parse_address(const char *address, uint16_t port,
return 0;
}
static int make_multicast_socket(struct sockaddr_storage *src, socklen_t src_len,
static bool is_multicast(struct sockaddr *sa, socklen_t salen)
{
if (sa->sa_family == AF_INET) {
static const uint32_t ipv4_mcast_mask = 0xe0000000;
struct sockaddr_in *sa4 = (struct sockaddr_in*)sa;
return (ntohl(sa4->sin_addr.s_addr) & ipv4_mcast_mask) == ipv4_mcast_mask;
} else if (sa->sa_family == AF_INET6) {
struct sockaddr_in6 *sa6 = (struct sockaddr_in6*)sa;
return sa6->sin6_addr.s6_addr[0] == 0xff;
}
return false;
}
static int make_socket(struct sockaddr_storage *src, socklen_t src_len,
struct sockaddr_storage *dst, socklen_t dst_len,
bool loop, int ttl)
{
@ -417,13 +430,14 @@ static int make_multicast_socket(struct sockaddr_storage *src, socklen_t src_len
pw_log_error("connect() failed: %m");
goto error;
}
val = loop;
if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP, &val, sizeof(val)) < 0)
pw_log_warn("setsockopt(IP_MULTICAST_LOOP) failed: %m");
if (is_multicast((struct sockaddr*)dst, dst_len)) {
if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP, &val, sizeof(val)) < 0)
pw_log_warn("setsockopt(IP_MULTICAST_LOOP) failed: %m");
val = ttl;
if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_TTL, &val, sizeof(val)) < 0)
pw_log_warn("setsockopt(IP_MULTICAST_TTL) failed: %m");
val = ttl;
if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_TTL, &val, sizeof(val)) < 0)
pw_log_warn("setsockopt(IP_MULTICAST_TTL) failed: %m");
}
val = 6;
if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &val, sizeof(val)) < 0)
@ -484,7 +498,7 @@ static int setup_stream(struct impl *impl)
return res;
if ((fd = make_multicast_socket(&impl->src_addr, impl->src_len,
if ((fd = make_socket(&impl->src_addr, impl->src_len,
&impl->dst_addr, impl->dst_len,
impl->mcast_loop, impl->ttl)) < 0)
return fd;
@ -508,7 +522,7 @@ static int get_ip(const struct sockaddr_storage *sa, char *ip, size_t len)
}
static void send_sap(struct impl *impl, bool bye)
{
char buffer[2048], src_addr[64], dst_addr[64];
char buffer[2048], src_addr[64], dst_addr[64], dst_ttl[8];
const char *user_name, *af;
struct sockaddr *sa = (struct sockaddr*)&impl->src_addr;
struct sap_header header;
@ -542,11 +556,15 @@ static void send_sap(struct impl *impl, bool bye)
if ((user_name = pw_get_user_name()) == NULL)
user_name = "-";
spa_zero(dst_ttl);
if (is_multicast((struct sockaddr*)&impl->dst_addr, impl->dst_len))
snprintf(dst_ttl, sizeof(dst_ttl), "/%d", impl->ttl);
snprintf(buffer, sizeof(buffer),
"v=0\n"
"o=%s %u 0 IN %s %s\n"
"s=%s\n"
"c=IN %s %s\n"
"c=IN %s %s%s\n"
"t=%u 0\n"
"a=recvonly\n"
"m=audio %u RTP/AVP %i\n"
@ -554,7 +572,7 @@ static void send_sap(struct impl *impl, bool bye)
"a=type:broadcast\n",
user_name, impl->ntp, af, src_addr,
impl->session_name,
af, dst_addr,
af, dst_addr, dst_ttl,
impl->ntp,
impl->port, impl->payload,
impl->payload, impl->format_info->mime,
@ -585,7 +603,7 @@ static int start_sap_announce(struct impl *impl)
int fd, res;
struct timespec value, interval;
if ((fd = make_multicast_socket(&impl->src_addr, impl->src_len,
if ((fd = make_socket(&impl->src_addr, impl->src_len,
&impl->sap_addr, impl->sap_len,
impl->mcast_loop, impl->ttl)) < 0)
return fd;

2
src/modules/module-rtp-source.c
View file

@ -559,6 +559,8 @@ static int session_new(struct impl *impl, struct sdp_info *info)
session->target_buffer / (2 * info->stride), info->info.rate);
pw_properties_set(props, "rtp.origin", info->origin);
pw_properties_setf(props, "rtp.payload", "%u", info->payload);
pw_properties_setf(props, "rtp.fmt", "%s/%u/%u", info->format_info->mime,
info->info.rate, info->info.channels);
if (info->session[0]) {
pw_properties_set(props, "rtp.session", info->session);
pw_properties_setf(props, PW_KEY_MEDIA_NAME, "RTP Stream (%s)",