Attention is currently required from: dexter, laforge, neels, pespin.

pespin uploaded patch set #2 to this change.

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The following approvals got outdated and were removed: Code-Review+1 by laforge, Verified+1 by Jenkins Builder

mgw_fsm: Modify RAB on HNB if IuUP local IP addr at MGW changes during MDCX

Allow IP address renegotation between HNB and MGW:
* Upon MGCP MDCX ACK received from the RAN-side conn, if the IP address/port
  changes, then restart the RAB-Ass-Req+Resp procedure on Iuh.
* Upon RAB-Ass-Resp received from the HNB, if the IP address/port changes,
  then go through another MDCX + MDCX ACK prcoedure on MGCP.

An MDCX counter is introduced to avoid infinite loops where the HNB and
the MGW keep changing their IP address triggered by the change on the
other side, eg. due to incorrect network/routing setup.
The counter is also used to track count in order to make sure that
always at least 1 MDCX is transmitted, in order to change conn_mode to
SEND_RECV.

Related: OS#6127
Change-Id: I936a50fed38a201c4a8da99b40f07082049e5157
---
M src/osmo-hnbgw/mgw_fsm.c
1 file changed, 113 insertions(+), 62 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-hnbgw refs/changes/68/35168/2

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