Osmocom Mobile Switching Centre
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Alexander Couzens e400b1161d ran_msg_iu: do not pass UEA0 to ranap_new_msg_sec_mod_cmd2()
On the protocol level, it's impossible to indicate UEA0 together
with the other algorithms.  The encryption is either a) disabled,
so the Encryption Information IE is not present, or b) enabled,
so the Encryption Information IE indicates UEA1 and/or UEA2.

Because of that, the ranap_new_msg_sec_mod_cmd2() would fail to
generate the RANAP PDU if the given bitmask has the UEA0 bit set.

Fixes: 505a94a610 ("Make UTRAN encryption algorithms configurable")
Change-Id: I3271d27c09fc8d70a912bce998ceffbce64dd95e
2021-12-09 13:42:28 +00:00
contrib Bump version: 1.7.0.43-aefbf-dirty → 1.8.0 2021-11-16 17:44:54 +01:00
debian Bump version: 1.7.0.43-aefbf-dirty → 1.8.0 2021-11-16 17:44:54 +01:00
doc Do not mention deprecated -l / --database options 2021-11-12 20:28:08 +03:00
include libvlr: vlr_set_ciph_mode(): avoid redundant check 2021-11-30 09:53:47 +00:00
m4 move openbsc/* to repos root 2017-07-12 23:17:10 +00:00
src ran_msg_iu: do not pass UEA0 to ranap_new_msg_sec_mod_cmd2() 2021-12-09 13:42:28 +00:00
tests libvlr: fix is_ciph_required(): always send SecModeCmd for UTRAN 2021-11-30 13:14:16 +00:00
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.gitreview update .gitreview to new repo url 2017-08-08 17:26:28 +02:00
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Makefile.am manuals: generate vty reference xml at build time 2020-07-12 12:30:28 +00:00
README README update. Explain more what it is than just the history 2021-01-06 13:13:46 +01:00
README.vty-tests Remove obsolete ./configure option 2017-11-29 14:24:54 +00:00
TODO-RELEASE Bump version: 1.7.0.43-aefbf-dirty → 1.8.0 2021-11-16 17:44:54 +01:00
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osmoappdesc.py osmoappdesc.py, tests: switch to python 3 2019-12-12 09:29:19 +00:00

README

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

OsmoMSC is an implementation of the 3GPP MSC (Mobile Switching Centre)
network element.  It implements the following core functionality within
the 2G (GSM) and 3G (UMTS) networks:

* mobility management
* call control (either via built-in MNCC handler or external osmo-sip-connector)
* USSD (exposed via GSUP)
* SMS (either via built-in SMSC or external via GSUP)

Historically, 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