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102 commits

Author SHA1 Message Date
Juliusz Chroboczek
48a9b10ce8 Use spatial scalability when simulcast is not available.
If the client requested a low-resolution stream and there is none,
switch to SID=0.
2021-08-03 13:14:11 +02:00
Juliusz Chroboczek
3d21a79880 Don't carry up tracks explicitly.
Left over from the old data structure.
2021-08-03 02:51:44 +02:00
Juliusz Chroboczek
51c31ab729 Improve error handling for negotiation failures.
Now that we constrain tracks in offers properly, there is no need
to manually check that the codecs have been matched correctly.
2021-08-02 20:00:23 +02:00
Juliusz Chroboczek
816b7a54df Restrict negotiation of downstream codecs, allow multiple profiles.
We now restrict the allowable codecs in the downstream direction,
which leads to a clean failure instead of a silent track.  We also
allow multiple profiles for a single codec.
2021-08-02 18:08:37 +02:00
Juliusz Chroboczek
efb298f002 Use sendonly transceiver for down tracks, embed receiver in track. 2021-08-01 13:33:01 +02:00
Juliusz Chroboczek
b527c8757a Add chathistory message. 2021-07-31 14:42:26 +02:00
Juliusz Chroboczek
97a5bf60ad Send the locked user-friendly message in the group status. 2021-07-30 19:44:39 +02:00
Juliusz Chroboczek
3b98e123e0 Send a message of kind "kicked" instead of "error". 2021-07-30 19:38:02 +02:00
Juliusz Chroboczek
a5c97fd849 Add System permission.
This replaces the OverridePermissions method, and is communicated
to clients that can reliably and safely identify a system user.
2021-07-30 19:26:34 +02:00
Juliusz Chroboczek
52a26327d7 Implement group status.
We now inform clients of the status of a group (locked, etc.).  Also
cleans up the handling of administrative messages, which solves the
issue of receiving "user" before "joined".
2021-07-16 19:51:54 +02:00
Juliusz Chroboczek
6ae79f21d6 Use unbounded buffer for track actions.
Without that, we might deadlock if the reader is blocked in read.
2021-07-16 03:03:45 +02:00
Juliusz Chroboczek
c540cad994 Move pushClientConnection into its own function. 2021-07-16 01:40:42 +02:00
Juliusz Chroboczek
053067548a Ensure that replaced down tracks are closed even on failure.
Thanks to Ludovic Rateau.
2021-07-15 23:52:03 +02:00
Juliusz Chroboczek
9b8d868647 Fix a race between delUpConn and addLocal.
We could call addLocal after the remote was closed, which
would cause the local connection to remain forever.

Thanks to Ludovic Rateau.
2021-07-15 16:03:06 +02:00
Juliusz Chroboczek
36d31f0db8 Maintain a reference to the connection associated to each track.
This avoids carrying an extra parameter in many places.
2021-07-14 14:05:23 +02:00
Juliusz Chroboczek
2da8faa8cf Implement per-stream requests. 2021-05-14 23:21:14 +02:00
Juliusz Chroboczek
515c4a5cd0 Rename pushConns to requestConns, move into Client interface.
Also allow selecting just a single connection.
2021-05-14 23:21:14 +02:00
Juliusz Chroboczek
6f9d7fc306 Scalable video coding (SVC). 2021-05-14 23:21:14 +02:00
Juliusz Chroboczek
7590588a54 Don't renegotiate if nothing changed during a request. 2021-05-14 18:19:44 +02:00
Juliusz Chroboczek
d236f4c6df Work around empty track id and msid. 2021-05-13 03:45:32 +02:00
Juliusz Chroboczek
26bf8a341a Don't send client parameters in delete message.
This avoids a race condition since the delete messages are sent
asynchronously.
2021-05-10 16:58:28 +02:00
Juliusz Chroboczek
795a40ceaf Simulcast. 2021-05-08 21:12:29 +02:00
Juliusz Chroboczek
be73380f9f Label streams, not tracks.
We used to label tracks individually, in a view to using the labelling
for simulcast.  Since then, the WebRTC community has converged on a
different strategy, where multiple tracks share a single mid and
are labelled with the rid extension.

We now label whole streams, which is simpler, and use the track's
kind (and, in the future, the rid) to disambiguate.  This changes the
protocol in two ways:

  * in offers, the "labels" dictionary is replaced by a single "label"
    field; and
  * the syntax of the "request" message has changed.
2021-04-29 18:28:16 +02:00
Juliusz Chroboczek
3ba2394be7 Implement user statuses.
The server now maintains a set of statuses for each user that are not
interpreted by the server but communicated to the other members of the
group using 'user' messages.
2021-04-28 17:01:05 +02:00
Juliusz Chroboczek
f0a39fca48 Send user permissions to client.
We now maintain the user list in the serverConnection.
2021-04-28 00:07:19 +02:00
Juliusz Chroboczek
fef38bc53f Protect against requesting when no group is joined.
Thanks to gregfr.
2021-04-15 12:07:05 +02:00
Juliusz Chroboczek
ea321be17a Make Kick part of the Client interface.
All clients implement Kick, no need for a separate interface.
2021-02-26 16:20:13 +01:00
Juliusz Chroboczek
ddb6039fa6 Fix error handling in client actions.
Thanks to Yacine.
2021-02-17 20:55:11 +01:00
Juliusz Chroboczek
260597d595 Ensure actions happen in order. 2021-02-15 00:35:09 +01:00
Juliusz Chroboczek
183ab4fed7 Use an unbounded buffer for client actions.
We no longer risk deadlocking when sending actions, which in turn
enables pushing connections synchronously.
2021-02-14 17:24:42 +01:00
Juliusz Chroboczek
3b505a89fe Factor out handling actions. 2021-02-14 16:47:36 +01:00
Juliusz Chroboczek
3c7b32056b Reduce writer timeout, increase amount of buffering.
If the writer gets congested, the whole group might be delayed.  Better
to drop the slow client in that case.
2021-02-14 16:26:56 +01:00
Juliusz Chroboczek
0261558e07 Protect against empty ids. 2021-02-05 16:07:58 +01:00
Juliusz Chroboczek
c3a19c9128 Avoid race between closing connections and terminating client.
We need to terminate all down connections synchronously, otherwise
we risk leaving open connections lying around.
2021-02-05 12:20:33 +01:00
Juliusz Chroboczek
66de0d16e7 Fix closing of replaced connections. 2021-02-04 23:51:51 +01:00
Juliusz Chroboczek
0ce509c62c Revert "Log client errors."
We're already logging in the caller.

This reverts commit f4811e8cf5.
2021-02-04 22:44:14 +01:00
Juliusz Chroboczek
263258a0c1 Implement renegotiation of down streams.
We used to destroy and recreate down streams whenever something changed,
which turned out to be racy.  We now properly implement renegotiation,
as well as atomic replacement of a stream by another one.
2021-02-03 19:15:40 +01:00
Juliusz Chroboczek
f34ec0ab66 Don't hide mismatches in the PeerConnection state automaton.
The previous behaviour led to silent failures, which was confusing.
2021-02-02 22:57:56 +01:00
Juliusz Chroboczek
f4811e8cf5 Log client errors. 2021-02-02 22:46:54 +01:00
Juliusz Chroboczek
d9e72f4fd0 Return an error when adding a duplicate down track. 2021-02-02 22:46:48 +01:00
Juliusz Chroboczek
36d6845dc1 Fix closing of replaced connections. 2021-02-01 14:08:54 +01:00
Juliusz Chroboczek
14a4303664 Rework connection replacement.
We used to signal connection replacement by reusing the same connection
id.  This turned out to be racy, as we couldn't reliably discard old
answers after a connection id was refused.

We now use a new id for every new connection, and explicitly signal
stream replacement in the offer message.  This requires maintaining a
local id on the client side.
2021-01-31 23:59:17 +01:00
Juliusz Chroboczek
f0dcd0b1d9 Rework locking of tracks.
We now add tracks after the stream has been pushed, so we need a lock
on down streams.  Also rework sendUpRTCP to reduce locking.
2021-01-19 23:55:33 +01:00
Juliusz Chroboczek
9a5c8b6b43 Handle answers in stable state.
Don't break the stream, just ignore the SDP.
2021-01-19 23:30:01 +01:00
Juliusz Chroboczek
6098d4af9d Implement autolock. 2021-01-14 03:56:37 +01:00
Juliusz Chroboczek
49bcc342ed Queue negotiation if not in stable state.
If we send two offers back to back, the second answer will arive in
stable state, which will confuse us.  Instead, queue the second offer.
2021-01-12 20:44:48 +01:00
Juliusz Chroboczek
820b303e84 Send localDescription instead of original SDP. 2021-01-11 20:41:34 +01:00
Juliusz Chroboczek
dad113c1f9 Generate transceivers from incoming SDP. 2021-01-11 20:24:09 +01:00
Juliusz Chroboczek
63e2b5a4c4 Implement 'noecho' field in client messages. 2021-01-11 16:30:07 +01:00
Juliusz Chroboczek
617aee325f Reduce ping timetout to 45 to 55s.
Thanks to Jeroen van Veen for the debugging.
2021-01-08 14:05:02 +01:00