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Harald Welte 0e2fa5dcb5 DTAP: Ensure proper DLCI is used in MSC-originated DTAP 
The DLCI field of the DTAP header indicates the SAPI as well as the
data link (main DCCH or SACCH).  We must make sure to use the correct
DLCI when sending DTAP to the BSC.

We achieve this by
* storing the DLCI in the msgb->cb while parsing the DTAP header
* storing the received DLCI (from msgb->cb) in the transaction for
  mobile-originated transactions
* using the trans->dlci to sent msgb->cb when transmitting L3
* filling the DTAP DLCI value from msgb->cb when transmitting DTAP

For MSC-originated transactions, we choose a DLCI value corresponding
to the service (SAPI=0 for CC, SAPI=3 for SMS) and store that in
trans->dlci.

Closes: OS#3150
Change-Id: If511b20f52575054cab1346d99a8cb68d827fdbf
 		2018-04-09 16:41:10 +02:00
contrib contrib: osmo-msc.service: Depend on osmo-mgw.service 2018-03-23 15:58:06 +01:00
debian Migrate from OpenSSL to osmo_get_rand_id() 2017-12-27 11:11:14 +00:00
doc remove unused "auth policy" VTY command 2018-02-14 09:04:56 +01:00
include DTAP: Ensure proper DLCI is used in MSC-originated DTAP 2018-04-09 16:41:10 +02:00
m4 move openbsc/* to repos root 2017-07-12 23:17:10 +00:00
src DTAP: Ensure proper DLCI is used in MSC-originated DTAP 2018-04-09 16:41:10 +02:00
tests unify allocation of gsm_subscriber_connection 2018-04-05 01:10:32 +02:00
.gitignore Remove traces of meas_feed 2018-01-24 14:04:46 +00:00
.gitreview update .gitreview to new repo url 2017-08-08 17:26:28 +02:00
.mailmap add .mailmap file for mapping git author name/mail in shortlog 2016-08-08 17:40:28 +00:00
AUTHORS move openbsc/* to repos root 2017-07-12 23:17:10 +00:00
COPYING move openbsc/* to repos root 2017-07-12 23:17:10 +00:00
Makefile.am Remove unneeded .py scripts 2017-12-03 21:14:10 +00:00
README rewrite README 2017-09-06 16:33:41 +02:00
README.vty-tests Remove obsolete ./configure option 2017-11-29 14:24:54 +00:00
configure.ac remove empty libcommon-cs 2018-03-22 17:11:30 +01:00
git-version-gen git-version-gen: look for .git in ./, not ../ 2017-07-12 23:28:38 +00:00
osmoappdesc.py doc/examples: add detailed cs7 config examples 2017-09-07 03:10:36 +02:00

README 

About OsmoMSC
=============

OsmoMSC originated from the OpenBSC project, which started as a minimalistic
all-in-one implementation of the GSM Network. In 2017, OpenBSC had reached
maturity and diversity (including M3UA SIGTRAN and 3G support in the form of
IuCS and IuPS interfaces) that naturally lead to a separation of the all-in-one
approach to fully independent separate programs as in typical GSM networks.

OsmoMSC was one of the parts split off from the old openbsc.git. Before, it was
the libmsc part of the old OsmoNITB. Since a true A interface and IuCS for 3G
support is available, OsmoMSC exists only as a separate standalone entity.

OsmoMSC exposes
- GSUP towards OsmoHLR (or a MAP proxy);
- A over IP towards a BSC (e.g. OsmoBSC);
- IuCS towards an RNC or HNB-GW (e.g. OsmoHNBGW) for 3G voice;
- MNCC (Mobile Network Call Control derived from GSM TS 04.07);
- SMPP 3.4 (Short Message Peer-to-Peer);
- The Osmocom typical telnet VTY and CTRL interfaces.

Find OsmoMSC issue tracker and wiki online at
https://osmocom.org/projects/osmomsc
https://osmocom.org/projects/osmomsc/wiki