By default, the "join" events contain the whole userdata as received
from the "auth" response. This might include a "displayname" field
containing the display name of the associated user.
For privacy reasons in certain scenarios, some attendees should not
be able to know which other users are connected to a room, therefore
the "displayname" should be hidden for them. By default, no filtering
occurrs.
When a publisher has a connection the publisher can update the
connection (for example, to add a video track to an audio only
connection) by sending an updated offer to Janus. Janus detects that,
adjusts the connection and then sends back an answer. Once the publisher
connection is updated Janus starts a renegotiation for the subscribers
and generates the offers to be sent to them.
The signaling server did not handle the event, so the offers were not
sent and the subscriber connections were not updated. Now the offers are
sent as needed, which makes possible for the renegotiation to be
completed by the clients.
In this case the "offer" message will also include an "update" parameter
so clients can differentiate between offers to create new connections or
update the existing one.
Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>
