TCPMux before would create one internal connection per ufrag. This could
cause remote IPv6 traffic to be dispatched to a local IPv4 handler (or
the inverse). The ice.Agent would then discard the traffic since a
candidate pair must be the same IP version.
This commit now creates two connections per ufrag. When requesting a
connection for a ufrag the user must specify if they want IPv4 or IPv6.
Relates to pion/webrtc#2125
Relates to pion/webrtc#1356
This addresses a few points issue of #245:
- Take a net.Listener instead of having global state
- Expose a net.TCPMux based API
Also, the unused closeChannel was removed from tcp_mux.go
Closes#253.
