Change in osmo-msc[master]: implement periodic Location Update expiry in the VLR

[Stefan Sperling]

Hello Neels Hofmeyr, Harald Welte, Jenkins Builder, 

I'd like you to reexamine a change. Please visit

    https://gerrit.osmocom.org/9211

to look at the new patch set (#4).

Change subject: implement periodic Location Update expiry in the VLR
......................................................................

implement periodic Location Update expiry in the VLR

Remove subscribers which fail to send periodic Location Updates from the
list of subscribers known to the VLR. This complements the IMSI detach
procedure: periodic LU expiry triggers an implicit IMSI detach.

Expired subscribers are purged from a periodic timer which iterates
over all subscribers once per minute.

Subscribers with an active connection do not expire. This is controlled
by the subscriber conn FSM which sets a subscriber's the LU expiry timeout
value to GSM_SUBSCRIBER_NO_EXPIRATION while a connection is active.

Add support for fake time with osmo_clock_gettime() to msc_vlr tests.

Related: OS#1976
Change-Id: Iebdee8b12d22acfcfb265ee41e71cfc8d9eb3ba9
---
M include/osmocom/msc/gsm_subscriber.h
M include/osmocom/msc/vlr.h
M src/libmsc/subscr_conn.c
M src/libvlr/vlr.c
M src/libvlr/vlr_lu_fsm.c
M tests/msc_vlr/msc_vlr_test_no_authen.c
M tests/msc_vlr/msc_vlr_test_no_authen.err
M tests/msc_vlr/msc_vlr_tests.c
M tests/msc_vlr/msc_vlr_tests.h
9 files changed, 281 insertions(+), 3 deletions(-)


  git pull ssh://gerrit.osmocom.org:29418/osmo-msc refs/changes/11/9211/4
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Gerrit-Project: osmo-msc
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: Iebdee8b12d22acfcfb265ee41e71cfc8d9eb3ba9
Gerrit-Change-Number: 9211
Gerrit-PatchSet: 4
Gerrit-Owner: Stefan Sperling <ssperling at sysmocom.de>
Gerrit-Reviewer: Harald Welte <laforge at gnumonks.org>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Gerrit-Reviewer: Stefan Sperling <ssperling at sysmocom.de>
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