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Python scripting interface to OsmoNITB/OsmoMSC MNCC interface
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Oliver Smith 066fae266a MNCC data size check: allow trailing data 
Verify is the parsed data is at least the size of the struct, not
exactly the size. Make it accept messages with additional data, like
the SDP information the TTCN-3 testsuite is sending since
Ic9568c8927507e161aadfad1a4d20aa896d8ae30.

This change makes the size checks consistent with the other size
checks in MNCC implementations such as osmo-sip-connector

Related: OS#4282
Related: osmo-sip-connector I522ce7f206932a816a64f03d916799c3215bb8c7
Change-Id: Ic8c24e6988ae2d3c4278c4adccae46e248c893b8
 		2023-01-04 15:29:09 +01:00
contrib contrib/manual_test_server: Make executable, add #! 2020-03-06 18:49:35 +01:00
rtpsource rtpsourcec: Fix compilation on Debian 11 / gcc-10.2.1 2023-01-04 15:29:09 +01:00
.gitignore update .gitignore with rtpsource object code file names 2020-04-30 07:01:06 +00:00
.gitreview Add git-review config 2019-03-12 17:06:24 +01:00
README recommend stock Debian/Ubuntu package for fysom 2018-08-09 12:01:51 +02:00
ctrl.py mncc_mt_loadgen.py: Program for MT call load testing with rtpsource 2020-03-07 21:48:08 +01:00
gsm_call_fsm.py GsmCallFsm: permit MNCC_REL_CNF in any state 2020-04-29 16:26:59 +00:00
mncc.h Update to MNCC v7 (Support IPv6 addresses) 2020-09-09 20:11:28 +02:00
mncc.py Update to MNCC v7 (Support IPv6 addresses) 2020-09-09 20:11:28 +02:00
mncc.xml Update to MNCC v7 (Support IPv6 addresses) 2020-09-09 20:11:28 +02:00
mncc_mt_loadgen.py mncc_mt_loadgen.py: add codec arg 2020-04-30 10:05:44 +02:00
mncc_sock.py MNCC data size check: allow trailing data 2023-01-04 15:29:09 +01:00
mncc_test.py mncc_test: add calls() to initiate series of calls 2020-03-07 21:48:08 +01:00
regen-mncc-py.sh regen-mncc-py.sh: Document how to obtain required bins from source 2020-09-09 20:11:27 +02:00
smpp_test.py *.py: use generic logging framework instead of print() 2018-09-30 17:21:41 +07:00

README 

python MNCC interface for OsmoNITB
(C) 2015 by Harald Welte
======================================================================

I've been working on a small python tool that can be used to attach to 
the MNCC interface of OsmoNITB.  It implements the 04.08 CC state 
machine with our MNCC primitives, including support for RTP bridge mode
of the voice streams.

= Requirements =

mncc-python needs python-pykka, and fysom.

On Debian or Ubuntu you can install them via
	sudo apt-get install python-pykka python-fysom

= Getting the code =

The first working version of the tool is available from
        http://git.osmocom.org/mncc-python/
or
        git clone git://git.osmocom.org/mncc-python

The code is pretty hacky in some places.  That's partially due to the 
fact that I'm much more familiar in the C, Perl and Erlang world than in
python.  Still I thought it's a good idea to do it in python to enable 
more people to use/edit/contribute to it.

I'm happy for review / cleanup suggestion by people with more Python-foo 
than I have.

Architecturally, I decided to do things a bit erlang-like, where we have
finite state machines in an actor models, and message passing between 
the actors.  This is what happens with the GsmCallFsm()'s, which are 
created by the GsmCallConnector() representing both legs of a call and 
the MnccActor() that wraps the MNCC socket towards OsmoNITB.

The actual encoding/decoding of MNCC messages is auto-generated from the
mncc header file #defines, enums and c-structures by means of ctypes 
code generation.

The immediate first use case for this was to be able to generate MT 
calls to a set of known MSISDNs and load all 14 TCH/H channels of a
single-TRX BTS.  It will connect the MT calls in pairs, so you end up 
with 7 MS-to-MS calls.

mncc_test.py currently drops you into a python shell where you can e.g.
start more / new calls by calling functions like
        connect_call("7839", "3802")
from that shell.  Above example initiates MT calls to subscribers with
extension number 7839 and 3802.

Exiting the shell by quit() or Ctrl+C will terminate all call FSMs and
terminate.