osmo-msc

History

Neels Hofmeyr 35706ddd80 gsm0408_rcv_cc: guard against NULL subscriber Check conn->subscr against NULL. gsm0408_rcv_cc() dereferences many conn members without checking presence: the bts and lchan members may be expected to be NULL in the ongoing MSC split and 3G developments. But the conn->subscr is initially NULL, so an MS sending a CC message before something like a LU or CM Service Request will result in a segfault. Prevent that. Note: the upcoming VLR will be more restrictive on what messages are processed, this is a "backport" to the situation on current master. Change-Id: If067db7cc0dd3210d9eb1da15be6b637795a3ecf		2017-02-03 00:34:02 +01:00
..
contrib	bsc_control.py: fix blocking	2017-01-23 12:31:45 +00:00
doc	Consistenly format variables in */Makefile.am files	2016-09-15 15:55:02 +02:00
include	paging.h: use '<>' include, not '""'	2017-02-02 04:26:36 +01:00
m4	Remove dependency to autoconf-archive	2017-01-31 19:54:58 +01:00
src	gsm0408_rcv_cc: guard against NULL subscriber	2017-02-03 00:34:02 +01:00
tests	CTRL: remove boilerplate	2017-01-25 11:52:45 +00:00
tools	hlrstat: Print numeric MCC/MNC in case no name is available	2010-01-01 15:08:38 +01:00
.gitignore	gitignore: gsup_test_client binary	2016-12-21 14:30:30 +01:00
AUTHORS	AUTHORS: Add Jacob and Neels	2015-12-05 23:04:11 +01:00
COPYING	License change: We are now AGPLv3+ instead of GPLv2+	2011-01-01 15:39:34 +01:00
Makefile.am	Consistenly format variables in */Makefile.am files	2016-09-15 15:55:02 +02:00
README	openbsc/README: some fixes, add CSCN and Iu*	2016-01-28 13:36:07 +01:00
README.vty-tests	Add README.vty-tests	2016-01-28 13:36:07 +01:00
configure.ac	Remove dependency to autoconf-archive	2017-01-31 19:54:58 +01:00
git-version-gen	automatically include program version and print it from vty and --version	2010-03-23 00:09:32 +08:00
openbsc.pc.in	Install gsm_04_08.h and required headers into a openbsc/	2010-02-16 17:51:42 +01:00
osmoappdesc.py	gtphub: Fix the VTY prompt to make the tests move forward	2015-12-14 15:24:50 +01:00

README

About OpenBSC
=============

OpenBSC started as a minimalistic all-in-one implementation of the GSM Network,
with particular emphasis on the functionality typically provided by the BSC,
MSC, HLR, VLR and SMSC.  Today it is a growing suite of libraries and programs,
implementing protocol stacks and functional elements, including

 * OsmoBSC - a pure GSM BSC, speaking Abis/IP to the BTS and A/IP to the MSC
 * OsmoBSC-MGCP - MGCP helper to the OsmoBSC software
 * OsmoNITB - a BSC+MSC+VLR+HLR+SMSC "Network in the box".
 * OsmoCSCN - a voice CN with A/IP and IuCS/IP towards the BSC and/or HNB-GW
 * OsmoSGSN - a GPRS SGSN with Gb/IP and IuPS/IP towards the PCU and/or HNB-GW
 * Osmo-GbProxy - a Proxy to aggregate many Gb links as one Gb link to the SGSN
 * OsmoBSCNAT - a gateway aggregating many A links as one A link to the MSC
 * OsmoGTPHUB - a hub aggregating many GTP links (between SGSN and GGSN)
 * ipaccess-utils - some tools to discover + configure ip.access nanoBTS
 * bs11_config - a tool to configure the Siemens BS-11 microBTS

Various interfaces towards the BTS are supported, among which are:

 * Classic A-bis over E1 using a mISDN based E1 interface. In other
   words, you can connect existing GSM Base Transceiver Station (BTS)
   through E1 to OpenBSC.  So far, we have made it work with the Siemens BS-11,
   various Ericsson RBS2xxx BTS models and the Nokia MetroSite.

 * A-bis over IP as used by the ip.access nanoBTS product family as well as
   the Open Source OsmoBTS software (by the same authors as OpenBSC).  OsmoBTS
   in turn supports various transceiver hardware, including the sysmoBTS
   product family, as well as SDR transceivers supported by OsmoTRX, such as
   the UmTRX or USRP boardss.

 * IuCS and IuPS over IP towards an HNB-GW (see osmo-iuh) for UMTS (3G)
   voice and data links.

Find OpenBSC online at
http://openbsc.osmocom.org/

	Harald Welte <laforge@gnumonks.org>