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module-rtp: Add configurable DSCP support

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Add configurable DSCP support with the net.dscp option. Applying only on
RTP, not on SAP discovery.
This commit is contained in:
Robert Rosengren 2023-03-03 14:01:24 +01:00 • committed by Wim Taymans
parent a7322d5043
commit 57a89e5723
1 changed files with 14 additions and 7 deletions
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21
src/modules/module-rtp-sink.c
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@ -129,6 +129,7 @@ PW_LOG_TOPIC_STATIC(mod_topic, "mod." NAME);
#define DEFAULT_TTL 1
#define DEFAULT_MTU 1280
#define DEFAULT_LOOP false
#define DEFAULT_DSCP 34 /* Default to AES-67 AF41 (34) */
#define DEFAULT_MIN_PTIME 2
#define DEFAULT_MAX_PTIME 20
@ -142,6 +143,7 @@ PW_LOG_TOPIC_STATIC(mod_topic, "mod." NAME);
"net.mtu=<desired MTU, default:"SPA_STRINGIFY(DEFAULT_MTU)"> " \
"net.ttl=<desired TTL, default:"SPA_STRINGIFY(DEFAULT_TTL)"> " \
"net.loop=<desired loopback, default:"SPA_STRINGIFY(DEFAULT_LOOP)"> " \
"net.dscp=<desired DSCP, default:"SPA_STRINGIFY(DEFAULT_DSCP)"> " \
"sess.name=<a name for the session> " \
"sess.min-ptime=<minimum packet time in milliseconds, default:2> " \
"sess.max-ptime=<maximum packet time in milliseconds, default:20> " \
@ -185,6 +187,7 @@ struct impl {
uint32_t mtu;
bool ttl;
bool mcast_loop;
uint32_t dscp;
float min_ptime;
float max_ptime;
uint32_t psamples;
@ -627,7 +630,7 @@ static bool is_multicast(struct sockaddr *sa, socklen_t salen)
static int make_socket(struct sockaddr_storage *src, socklen_t src_len,
struct sockaddr_storage *dst, socklen_t dst_len,
bool loop, int ttl)
bool loop, int ttl, int dscp)
{
int af, fd, val, res;
@ -660,10 +663,11 @@ static int make_socket(struct sockaddr_storage *src, socklen_t src_len,
if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &val, sizeof(val)) < 0)
pw_log_warn("setsockopt(SO_PRIORITY) failed: %m");
#endif
/* FIXME AES67 wants IPTOS_DSCP_AF41 */
val = IPTOS_LOWDELAY;
if (setsockopt(fd, IPPROTO_IP, IP_TOS, &val, sizeof(val)) < 0)
pw_log_warn("setsockopt(IP_TOS) failed: %m");
if (dscp > 0) {
val = IPTOS_DSCP(dscp << 2);
if (setsockopt(fd, IPPROTO_IP, IP_TOS, &val, sizeof(val)) < 0)
pw_log_warn("setsockopt(IP_TOS) failed: %m");
}
return fd;
@ -730,7 +734,8 @@ static int setup_stream(struct impl *impl)
if ((fd = make_socket(&impl->src_addr, impl->src_len,
&impl->dst_addr, impl->dst_len,
impl->mcast_loop, impl->ttl)) < 0)
impl->mcast_loop, impl->ttl,
impl->dscp)) < 0)
return fd;
impl->rtp_fd = fd;
@ -872,7 +877,7 @@ static int start_sap_announce(struct impl *impl)
if ((fd = make_socket(&impl->src_addr, impl->src_len,
&impl->sap_addr, impl->sap_len,
impl->mcast_loop, impl->ttl)) < 0)
impl->mcast_loop, impl->ttl, 0)) < 0)
return fd;
impl->sap_fd = fd;
@ -1184,6 +1189,7 @@ int pipewire__module_init(struct pw_impl_module *module, const char *args)
impl->mtu = pw_properties_get_uint32(props, "net.mtu", DEFAULT_MTU);
impl->ttl = pw_properties_get_uint32(props, "net.ttl", DEFAULT_TTL);
impl->mcast_loop = pw_properties_get_bool(props, "net.loop", DEFAULT_LOOP);
impl->dscp = pw_properties_get_uint32(props, "net.dscp", DEFAULT_DSCP);
ts_offset = pw_properties_get_int64(props, "sess.ts-offset", DEFAULT_TS_OFFSET);
impl->ts_offset = ts_offset < 0 ? rand() : ts_offset;
@ -1221,6 +1227,7 @@ int pipewire__module_init(struct pw_impl_module *module, const char *args)
pw_properties_setf(stream_props, "rtp.ttl", "%u", impl->ttl);
pw_properties_setf(stream_props, "rtp.ptime", "%u",
impl->psamples * 1000 / impl->rate);
pw_properties_setf(stream_props, "rtp.dscp", "%u", impl->dscp);
impl->core = pw_context_get_object(impl->module_context, PW_TYPE_INTERFACE_Core);
if (impl->core == NULL) {