Instead of using timerfd, use the context timer-queue to schedule
timeouts. This saves fds and removes some redundant code.
Make the rtp-source timeout and standby code a bit better by using
atomic operations.
Move the code to recalculate the hash and version into make_sdp. Add a
boolean argument to the make_sdp function. Recalculate the hash and
version when we are making a new SDP and leave the old values if we
are making an SDP to compare against the current one.
We don't initially have the SAP socket open, so we can't generate an SDP
(because we don't have the interface address). So in addition to the
regular flow, also trigger SDP creation after opening the SAP socket, so
we can have a valid SDP for the announcement.
The sending was broken in commit a44afd84. We delay the SAP fd openeing
for reasons explained in commit f2f204d6).
Reorganize some code to separate the creation and sending of the SAP
message.
Check if when the node changed, we have an actual change in the SDP
before we send BYE and the new SAP message. It's possible that nothing
changed, for example when the node simply changed state or an unrelated
property.
In line also with da8e207de9,
make sure that the rtp-sap receive socket listens only to the configured
sap.ip in unicast mode, instead of accepting all packets on the port.
This additionally fixes breakage that was inadvertently introduced in
f2f204d604. Because the
`struct sockaddr_storage *sa` argument in `make_recv_socket` points
to `impl->sap_addr`, changing the address to INADDR_ANY in the unicast
code path would also silently cause the sender socket to try to
connect to INADDR_ANY and fail.
The "connection" address ("c=") is meant to be the address that the
RTP receiver will use to filter for incoming packets. In multicast,
it must be the multicast address, which is also the "destination"
address in this context. In unicast, however, it must be the sender's
address, i.e. the "source" in this context. The RTP receiver will
then call connect() on this address, effectively filtering the incoming
packets to the ones coming from that particular source.
Add spa_json_begin_array/object to replace
spa_json_init+spa_json_begin_array/object
This function is better because it does not waste a useless spa_json
structure as an iterator. The relaxed versions also error out when the
container is mismatched because parsing a mismatched container is not
going to give any results anyway.
Avoids need for additional configuration to allow disabling send (which
in turn was needed to avoid errors when a network interface is not
available on start).
In circumstances where the network interface is not ready yet,
creating a send socket will fail. This may be ok if we only
intend to use rtp-sap as a listener, therefore add an option for it.
This allows us to specify a static session ID, so that (Dante) receivers
can uniquely identify us as a sender. This prevents duplicate streams in
Dante Controller, for example.
Make a method to get the current time to compare agains the pw_time-now
field. This is currently CLOCK_MONOTONIC but make this into a method
so that we can more easily change it later.
Use `getaddrinfo` in `parse_address` instead of `inet_pton`.
Display Ipv6 addresses with scope identifiers correctly in `get_ip`
functions using `if_indextoname`.
Make a socket of the same address family as the address we're going to
bind it to.
When the source.ip is not specified, use the default in the same address
family as the sap.ip.
Probe the interface for addresses of the same family as the sap.ip.
Makes pactl load-module module-rtp-recv sap_address=:: work.
See #3851
That is indeed 0 for nearly any device. However the NTP value in the session identification part plays a crucial role for distinguishing between streams in some implementations, e.g. Dante.
Dante Controller does not recognize next stream having the same NTP value. Work around that by adding current number of sessions to the time and the magic value.
Co-authored-by: Dewi Seignard <dewiweb@gmail.com>
