network: use originating RTP packet address for loopback

When a connection is created in loopback mode all incoming
packets should be reflected back to their origin. If the
user did not supply a destination address with the CRCX
command all incoming packets will be tossed because no
destination address is officially known yet.

If there is no destination address set and the connection
is in loopback mode. Then use the originating address of
the incoming packet as destination address.

Change-Id: I3d1abe56d016e28c97f60635eb574679d36e2c52
1 file changed