Attention is currently required from: fixeria, laforge, neels, osmith.

pespin uploaded patch set #5 to this change.

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The following approvals got outdated and were removed: Code-Review+1 by osmith, Verified+1 by Jenkins Builder

Support tearing down PFCP upon PS-RAB-ASS-REQ (REL)

Before this patch, RAB Assign Request containing only a ReleaseList
where being discarded with an error.

This commit adds logic to allow passing those messages, and upon RAB
Assign Response, tear down the related PFCP sessions before forwarding
it back to the CN.

This is scenario is tested in TTCN-3 testsuite
HNBGW_Tests.TC_ps_rab_release.

Related: SYS#7451
Change-Id: Iea7f2cea4aa1fbab12cb8bf0275cd43d9e0713c2
---
M include/osmocom/hnbgw/ps_rab_ass_fsm.h
M include/osmocom/hnbgw/ps_rab_fsm.h
M src/osmo-hnbgw/ps_rab_ass_fsm.c
M src/osmo-hnbgw/ps_rab_fsm.c
4 files changed, 143 insertions(+), 66 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-hnbgw refs/changes/75/40275/5

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Gerrit-MessageType: newpatchset
Gerrit-Project: osmo-hnbgw
Gerrit-Branch: master
Gerrit-Change-Id: Iea7f2cea4aa1fbab12cb8bf0275cd43d9e0713c2
Gerrit-Change-Number: 40275
Gerrit-PatchSet: 5
Gerrit-Owner: pespin <pespin@sysmocom.de>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: fixeria <vyanitskiy@sysmocom.de>
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