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Libosmocore

Osmocom core libraries; mirrored from https://gitea.osmocom.org/osmocom/libosmocore

From osmocom·Updated May 17, 2026·View on GitHub·

libosmocore - set of Osmocom core libraries =========================================== The project is written primarily in C, distributed under the GNU General Public License v2.0 license, first published in 2012. Key topics include: 3gpp, cellular, gsm, telecommunication, umts.

libosmocore - set of Osmocom core libraries

This repository contains a set of C-language libraries that form the
core infrastructure of many Osmocom Open Source
Mobile Communications projects.

Historically, a lot of this code was developed as part of the
OpenBSC project, but which are
of a more generic nature and thus useful to (at least) other programs
that we develop in the sphere of Free Software / Open Source mobile
communications.

There is no clear scope of it. We simply move all shared code between
the various Osmocom projects in this library to avoid code duplication.

The libosmocore.git repository build multiple libraries:

  • libosmocore contains some general-purpose functions like select-loop
    abstraction, message buffers, timers, linked lists
  • libosmovty contains routines related to the interactive command-line
    interface called VTY
  • libosmogsm contains definitions and helper code related to GSM protocols
  • libosmoctrl contains a shared implementation of the Osmocom control
    interface
  • libosmogb contains an implementation of the Gb interface with its
    NS/BSSGP protocols
  • libosmocodec contains an implementation of GSM voice codecs
  • libosmocoding contains an implementation of GSM channel coding
  • libosmosim contains infrastructure to interface SIM/UICC/USIM cards

Homepage

The official homepage of the project is
https://osmocom.org/projects/libosmocore/wiki/Libosmocore

GIT Repository

You can clone from the official libosmocore.git repository using

git clone https://gitea.osmocom.org/osmocom/libosmocore

There is a web interface at https://gitea.osmocom.org/osmocom/libosmocore

Documentation

Doxygen-generated API documentation is generated during the build
process, but also available online for each of the sub-libraries at
https://ftp.osmocom.org/api/latest/libosmocore/

Mailing List

Discussions related to libosmocore are happening on the
openbsc@lists.osmocom.org mailing list, please see
https://lists.osmocom.org/mailman/listinfo/openbsc for subscription
options and the list archive.

Please observe the Osmocom Mailing List
Rules

when posting.

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 libosmocore can be seen at
https://gerrit.osmocom.org/#/q/project:libosmocore+status:open

Contributors

Showing top 12 contributors by commit count.

View all contributors on GitHub →

This article is auto-generated from osmocom/libosmocore via the GitHub API.Last fetched: 6/14/2026