add RTP proxy mode for ip.access

Up until now, we only supported direct RTP streams between ip.access BTS.
With this commit, the user can specify '-P' to the command line to enable
a RTP/RTCP proxy inside OpenBSC.  The nanoBTS will then send all their voice
data to OpenBSC, which will relay it to the respective destination BTS (which
can be the same BTS).

The default behaviour remains unchanged.  Without '-P' on the command line,
RTP/RTCP is exchanged directly.
6 files changed
tree: d9e4fd82232b2dd80a19ecba40a1509a8fac2501
  1. linux-kernel/
  2. openbsc/
  3. wireshark/