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Osmocom Serving GPRS Support Node for 2G(GPRS) and 3G(UMTS)
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Oliver Smith 6227129b06 debian/changelog: bump to 1.14.0 unreleased 
Fix that debian/changelog is still on 1.12.0 on current master while the
latest stable version is on 1.13.x. This is confusing, and it also
results in unexpected behavior on debian 13: After enabling the Osmocom
nightly repository and asking apt to install osmo-sgsn or osmo-gtphub,
it will pick the 1.13.x versions from the debian repository instead of
the versions from the Osmocom nightly repository.

Related: OS#6968
Change-Id: Id8763bf96141fcb38f550c7885a1c9fd02cec198
2026-03-06 10:27:04 +01:00
.github Add funding link to github mirror 2024-03-23 17:03:36 +01:00
contrib jenkins.sh: No need to build libosmo-sigtran with doxygen 2024-12-10 16:52:17 +01:00
debian debian/changelog: bump to 1.14.0 unreleased 2026-03-06 10:27:04 +01:00
doc doc: set state-dir to /var/lib/osmocom/osmo-sgsn 2024-05-27 14:36:01 +02:00
include Pass pdp_t to sgsn_pdp_ctx_alloc() 2025-11-18 10:15:53 +01:00
m4 Drop unneeded ax_check_compile_flag.m4 2022-01-11 18:13:46 +01:00
src pdpctx: Use pdp->teic_own as rate_ctr id 2025-11-18 10:17:19 +01:00
tests Introduce iu_rnc FSM 2025-09-02 18:55:03 +02:00
.gitignore Rename bscconfig.h -> config.h 2023-01-11 12:51:38 +01:00
.gitreview .gitreview: update repo url to new location 2017-08-08 17:28:24 +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 2017-08-27 17:40:52 +02:00
configure.ac Add Routing Areas 2024-10-21 20:53:52 +02:00
COPYING move openbsc/* to repos root 2017-08-27 17:40:52 +02:00
git-version-gen git-version-gen: Don't check for .git directory 2018-07-25 07:03:14 +00:00
Makefile.am contrib: remove rpm spec file 2024-05-13 08:39:35 +00:00
osmoappdesc.py doc: set state-dir to /var/lib/osmocom/osmo-sgsn 2024-05-27 14:36:01 +02:00
README.md README.md: cosmetic: fix a typo 2024-06-05 18:34:07 +07:00
README.vty-tests update git URLs (git -> https; gitea) 2022-06-20 10:15:50 +00:00
TODO-RELEASE ranap: Improve error handling in Rx RESET 2025-09-02 18:51:43 +02:00

README.md

osmo-sgsn - Osmocom SGSN Implementation

This repository contains a C-language implementation of a Serving GPRS Support Node (SGSN) for 2.5/2.75G (GPRS/EDGE) and 3G (UMTS). It is part of the Osmocom Open Source Mobile Communications project.

OsmoSGSN exposes

  • Gb towards PCUs (e.g. OsmoPCU): Various GbIP flavors + Gb/FR/E1
  • GTP towards a GGSN (e.g. OsmoGGSN)
  • IuPS over IP towards RNCs / HNBGW (e.g. osmo-hnbgw)
  • The Osmocom typical telnet VTY and CTRL interfaces.
  • The Osmocom typical statsd exporter.
  • GSUP (custom MAP-like protocol) towards osmo-hlr

OsmoSGSN implements

  • GPRS mobility management
  • GPRS session management

Homepage

You can find the OsmoSGSN homepage online at https://osmocom.org/projects/osmosgsn/wiki.

GIT Repository

You can clone from the official osmo-sgsn.git repository using

    git clone https://gitea.osmocom.org/cellular-infrastructure/osmo-sgsn

There is a web interface at https://gitea.osmocom.org/cellular-infrastructure/osmo-sgsn

Documentation

User Manuals and VTY reference manuals are [optionally] built in PDF form as part of the build process.

Pre-rendered PDF version of the current "master" can be found at User Manual as well as the VTY Reference Manual

Forum

We welcome any osmo-sgsn related discussions in the Cellular Network Infratructure -> 2G/3G Core Network. section of the osmocom discourse (web based Forum).

Mailing List

Discussions related to osmo-sgsn are happening on the osmocom-net-gprs@lists.osmocom.org mailing list, please see https://lists.osmocom.org/postorius/lists/osmocom-net-gprs.lists.osmocom.org/ for subscription options and the list archive.

Please observe the Osmocom Mailing List Rules when posting.

Issue Tracker

We use the issue tracker of the osmo-sgsn project on osmocom.org for tracking the state of bug reports and feature requests. Feel free to submit any issues you may find, or help us out by resolving existing issues.

Contributing

Our coding standards are described at https://osmocom.org/projects/cellular-infrastructure/wiki/Coding_standards

We use a Gerrit based patch submission/review process for managing contributions. Please see https://osmocom.org/projects/cellular-infrastructure/wiki/Gerrit for more details

The current patch queue for osmo-sgsn can be seen at https://gerrit.osmocom.org/#/q/project:osmo-sgsn+status:open

History

OsmoSGSN originated from the OpenBSC project, as a separate program within openbsc.git. In 2017, OpenBSC was split in separate repositories, and hence OsmoSGSN was given its own separate git repository.