Adding and disposing remote data channels is done from different
threads; they are added from the WebRTC signaling thread when
"onDataChannel" is called, while they can be disposed potentially from
any thread when "removePeerConnection" is called. To prevent race
conditions between them now both operations are synchronized.
However, as "onDataChannel" belongs to an inner class it needs to use a
synchronized statement with the outer class lock. This could still cause
a race condition if the same data channel was added again; this should
not happen, but it is handled just in case.
Moreover, once a data channel is disposed it can be no longer used, and
trying to call any of its methods throws an "IllegalStateException". Due
to this, as sending can be also done potentially from any thread, it
needs to be synchronized too with removing the peer connection.
State changes on data channels as well as receiving messages are also
done in the WebRTC signaling thread. State changes needs synchronization
as well, although receiving messages should not, as it does not directly
use the data channel (and it is assumed that using the buffers of a
disposed data channel is safe). Nevertheless a little check (which in
this case requires synchronization) was added to ignore the received
messages if the peer connection was removed already.
Finally, the synchronization added to "send" and "onStateChange" had the
nice side effect of making the pending data channel messages thread-safe
too, as before it could happen that a message was enqueued when the
pending messages were being sent, which caused a
"ConcurrentModificationException".
Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>
Data channel messages can be sent only when the data channel is open.
Otherwise the message is simply lost. Clients of the
PeerConnectionWrapper do not need to be aware of that detail or keep
track of whether the data channel was open already or not, so now data
channel messages sent before the data channel is open are queued and
sent once the data channel is opened.
Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>
Data channel messages are expected to be sent using the "status" data
channel that is locally created. However, if another data channel was
opened by the remote peer the reference to the "status" data channel was
overwritten with the new data channel, and messages were sent instead on
the remote data channel.
In current Talk versions that was not a problem, and the change makes no
difference either, because since the support for Janus 1.x was added
data channel messages are listened on all data channels, independently
of their label or whether they were created by the local or remote peer.
However, in older Talk versions this fixes a regression introduced with
the support for Janus 1.x. In those versions only messages coming from
the "status" or "JanusDataChannel" data channels were taken into
account. When Janus is not used the WebUI opens the legacy
"simplewebrtc" data channel, so that data channel may be the one used to
send data channel messages (if it is open after the "status" data
channel), but the messages received on that data channel were ignored by
the WebUI. Nevertheless, at this point this is more an academic problem
than a real world problem, as it is unlikely that there are many
Nextcloud servers with Talk < 16 and without HPB being used.
Independently of all that, when the peer connection is removed only the
"status" data channel is disposed, but none of the remote data channels
are. This is just a variation of an already existing bug (the last open
data channel was the one disposed due to being the last saved reference,
but the rest were not) and it will be fixed in another commit.
Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>
Log methods are static, so they can not be mocked using Mockito.
Although it might be possible to use PowerMockito a dummy implementation
was added instead, as Log uses are widespread and it is not something
worth mocking anyway.
Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>
When the message applies to all participants the property is all in
lower case. The comparison is case sensitive, so the message was ignored
and the call was not left by the Talk Android app.
Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>
This test respects different API versions and checks if default values are set as expected.
- remove deprecated+unused methods
- remove comments
- remove unnecessary double-bang operator
Signed-off-by: Marcel Hibbe <dev@mhibbe.de>
Starting with Talk 20 the signaling messages that provide updates to the
participants ("participants->update" in the external signaling server,
"usersInRoom" in the internal signaling server) now include "actorType"
and "actorId" properties for each participant.
Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>
To support federated rooms, capabilities have to be checked from the room which now also has capabilities.
If room is not federated, capabilities fromuser are still checked.
This is why CapabilitiesUtil had to be refactored to accept SpreedCapabilities which can come from room or user.
Other than that, many other changes were made as a result of this change.
Signed-off-by: Marcel Hibbe <dev@mhibbe.de>
- replace remaining controllers with activities
- remove conductor lib
- modify some code related to account management and conductor
Signed-off-by: Marcel Hibbe <dev@mhibbe.de>
