neels uploaded patch set #4 to this change.

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allow (second) CS RAB Assignment Request without RTP info

In the field, we've encountered a so far unsupported scenario: after a
RAB Assignment Request and Response have successfully set up an RTP
stream, the CN sends *another* RAB Assignment Request to modify some SDU
parameters, omitting the transportLayerInformation IE (not modifying the
RTP address).

Directly forward all RAB Assignment Requests that have no RTP
information. This covers above use case, and also generally applies: no
RTP info means nothing to tell the MGW about.

Do not (yet?) support modifying the RTP address/port.

Related: osmo-ttcn3-hacks Iadaba0e5e82ad6d163ad509904ede213e2462d5c
Related: SYS#6624
Change-Id: I25bf19981cd75a87a7ceb3382dae1ec626ae475c
---
M src/osmo-hnbgw/mgw_fsm.c
1 file changed, 80 insertions(+), 0 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-hnbgw refs/changes/74/34974/4

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