commit 1626f909461becfe1bb09707640ab23685b970dd
author Harald Welte <laforge@gnumonks.org> Sat May 26 22:56:59 2018 +0200
committer laforge <laforge@gnumonks.org> Tue Jun 18 18:09:26 2019 +0000
tree 53813aaf3aef62737bb66bc25d97c14b48fecb56
parent 062cd20993f6c6c0525c17cfe94b8721db79964d

Re-introduce support for IPA-encapsulated MGCP

Old osmo-bsc-sccplite already supported this, but in the migration
over to libosmo-sigtran and to real 3GPP AoIP, this functionality
got lost.

We now create a UDP proxy socket. Any MGCP commands received via IPA
from MSC (or rather: bsc_nat) are retransmitted to the MGW via UDP on
this socket.  Any responses back from the MGW received on the UDP
socket are retransmitted back to MSC/bsc_nat as MGCP inside the IPA
multiplex.

Closes: OS#2536
Change-Id: I38ad8fa645c08900e0e1f1b4b96136bc6d96b3ab