This change adapts pion/ice to use a new interface for most network
related operations. The interface was formerly a simple struct vnet.Net
which was originally intended to facilicate testing. By replacing it
with an interface we have greater flexibility and allow users to hook
into the networking stack by providing their own implementation of
the interface.
Before we would set the PeerConnection to failed, but we would leave the
DTLSTransport. This means that a user could still interact with the
other transports.
Relates to #1708
ReadDeadline is supported by RTPReceiver but not RTPSender. This
commit attempts to provide similar method for RTPSender.
If SetReadDeadine is called with:
- an empty time.Time: it will clear all previous set deadline.
- a non-empty time.Time: it will abort all pending "ReadRTCP" calls if
the specified time is up.
