osmith has uploaded a new patch set (#19) to the change originally created by 
neels. ( https://gerrit.osmocom.org/c/osmo-hlr/+/16258 )

Change subject: D-GSM 3/n: implement roaming by mslookup in osmo-hlr

D-GSM 3/n: implement roaming by mslookup in osmo-hlr

Add mslookup client to find remote home HLRs of unknown IMSIs, and
proxy/forward GSUP for those to the right remote HLR instances.

Add remote_hlr.c to manage one GSUP client per remote HLR GSUP address.

Add proxy.c to keep state about remotely handled IMSIs (remote GSUP address,
MSISDN, and probably more in future patches).  The mslookup_server that
determines whether a given MSISDN is attached locally now also needs to look in
the proxy record: it is always the osmo-hlr immediately peering for the MSC
that should respond to mslookup service address queries like SIP and SMPP.
(Only gsup.hlr service is always answered by the home HLR.)

Add dgsm.c to set up an mdns mslookup client, ask for IMSI homes, and to decide
which GSUP is handled locally and which needs to go to a remote HLR.

Add full VTY config and VTY tests.

For a detailed overview of the D-GSM and mslookup related files, please see the
elaborate comment at the top of mslookup.c (already added in an earlier patch).

Change-Id: I2fe453553c90e6ee527ed13a13089900efd488aa
M include/osmocom/hlr/Makefile.am
A include/osmocom/hlr/dgsm.h
M include/osmocom/hlr/gsup_server.h
M include/osmocom/hlr/hlr.h
M include/osmocom/hlr/hlr_vty.h
M include/osmocom/hlr/logging.h
M include/osmocom/hlr/mslookup_server.h
A include/osmocom/hlr/proxy.h
A include/osmocom/hlr/remote_hlr.h
M src/Makefile.am
A src/dgsm.c
M src/dgsm_vty.c
M src/gsup_server.c
M src/hlr.c
M src/hlr_vty.c
M src/logging.c
M src/mslookup_server.c
A src/proxy.c
A src/remote_hlr.c
M tests/gsup_server/Makefile.am
M tests/test_nodes.vty
21 files changed, 2,005 insertions(+), 8 deletions(-)

  git pull ssh://gerrit.osmocom.org:29418/osmo-hlr refs/changes/58/16258/19
To view, visit https://gerrit.osmocom.org/c/osmo-hlr/+/16258
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Gerrit-Project: osmo-hlr
Gerrit-Branch: master
Gerrit-Change-Id: I2fe453553c90e6ee527ed13a13089900efd488aa
Gerrit-Change-Number: 16258
Gerrit-PatchSet: 19
Gerrit-Owner: neels <nhofm...@sysmocom.de>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: laforge <lafo...@osmocom.org>
Gerrit-Reviewer: neels <nhofm...@sysmocom.de>
Gerrit-Reviewer: osmith <osm...@sysmocom.de>
Gerrit-Reviewer: pespin <pes...@sysmocom.de>
Gerrit-MessageType: newpatchset

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