Change in osmo-msc[master]: libmsc/VTY: introduce kill-switch for routing SMS over GSUP

[Vadim Yanitskiy]

Hello Harald Welte, Jenkins Builder, 

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

    https://gerrit.osmocom.org/11918

to look at the new patch set (#8).

Change subject: libmsc/VTY: introduce kill-switch for routing SMS over GSUP
......................................................................

libmsc/VTY: introduce kill-switch for routing SMS over GSUP

As a rudiment of OsmoNiTB, OsmoMSC is still involved in SMS
processing, storage (in SQLite DB), and routing (via SMPP).
In real networks this is done by the external entity called
SMSC (SMS Centre), while the MSC is doing re-encapsulation
of GSM 04.11 SM-TL (Transport Layer) payload (i.e. TPDU)
between SM-RL (Relay Layer) and MAP.

Since OsmoMSC itself is not a 'Network in The Box' anymore, it
makes sense to replicate the 'traditional' behaviour of MSC.
The problem is that this behaviour cannot co-exist with the
current implementation, so the key idea is to rip out the
local SMS storage and routing from OsmoMSC, and (re)implement
it in a separate process (OsmoSMSC?).

As a temporary solution, this change introduces a 'kill-switch'
VTY option that enables routing of SMS messages over GSUP
towards ESME (through VLR and HLR), but breaks the local
storage and routing. This is why it's disabled by default.

As soon as we move the SMS processing and storage away from
OsmoMSC, this behaviour would be enabled by default, and
the VTY option would be hidden and deprecated. At the moment,
this option basically does nothing, and will take an effect
in the follow-up changes.

Change-Id: Ie57685ed2ce1e4c978e775b68fdffe58de44882b
Related: OS#3587
---
M include/osmocom/msc/gsm_data.h
M src/libmsc/msc_vty.c
M tests/test_nodes.vty
3 files changed, 33 insertions(+), 0 deletions(-)


  git pull ssh://gerrit.osmocom.org:29418/osmo-msc refs/changes/18/11918/8
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Gerrit-Project: osmo-msc
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: Ie57685ed2ce1e4c978e775b68fdffe58de44882b
Gerrit-Change-Number: 11918
Gerrit-PatchSet: 8
Gerrit-Owner: Vadim Yanitskiy <axilirator at gmail.com>
Gerrit-Reviewer: Harald Welte <laforge at gnumonks.org>
Gerrit-Reviewer: Jenkins Builder (1000002)
Gerrit-Reviewer: Vadim Yanitskiy <axilirator at gmail.com>
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