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gerrit.osmocom.org / libosmocore / 9fe1f9fb0b3197cdecaa55017d3afd7355e59c36
commit9fe1f9fb0b3197cdecaa55017d3afd7355e59c36[log] [tgz]
authorHarald Welte <laforge@gnumonks.org>Thu Nov 29 13:47:39 2018 +0100
committerPau Espin Pedrol <pespin@sysmocom.de>Wed Dec 22 14:58:31 2021 +0100
tree666217e80ab72b8c2fb2ae7c408a4fdb477d004c
parent28c438845f327f7f022a8adfc966a3670b8c8146 [diff]
Introduce CRC and FSM for IuUP (user plane) as used in 3G RTP data

Only support for SMpSDU mode is introduced in this commit.

Not supported explicit list:
- Transparent mode
- ATM/AAL2 based Transport layer
- GTP-U based Transport Layer
- Iu Rate Control procedure
- Time Alignment procedure

APIs are provided to allocate the primitives properly inside the related
msgb. This way primitives can be placed in the headroom, leaving the
data part of the msgb for the IuUP payload, hence allowing re-use of the
msgb and 0 copy of IuUP payload when forwarding data over RNL<->TNL.
Since RNL and TNL primitives relu struct osmo_prim_header, which is not
packed, they cannot be set to packed, and hence proper memory alignment
in the msgb must be done to avoid misaligned accesses (Asan errors about
it otherwise).

Related: SYS#5516
Change-Id: Ibe356fa7b1abaca0091e368db8478e79c09c6cb0
14 files changed
tree: 666217e80ab72b8c2fb2ae7c408a4fdb477d004c
  1. contrib/
  2. debian/
  3. doc/
  4. include/
  5. m4/
  6. src/
  7. tapset/
  8. tests/
  9. utils/
  10. .gitignore
  11. .gitreview
  12. .mailmap
  13. configure.ac
  14. COPYING
  15. Doxyfile.codec.in
  16. Doxyfile.coding.in
  17. Doxyfile.core.in
  18. Doxyfile.ctrl.in
  19. Doxyfile.gb.in
  20. Doxyfile.gsm.in
  21. Doxyfile.vty.in
  22. git-version-gen
  23. libosmocodec.pc.in
  24. libosmocoding.pc.in
  25. libosmocore.pc.in
  26. libosmoctrl.pc.in
  27. libosmogb.pc.in
  28. libosmogsm.pc.in
  29. libosmosim.pc.in
  30. libosmousb.pc.in
  31. libosmovty.pc.in
  32. Makefile.am
  33. osmo-release.mk
  34. osmo-release.sh
  35. README.md
  36. TODO-RELEASE
README.md

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 git://git.osmocom.org/libosmocore.git

There is a cgit interface at https://git.osmocom.org/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 us 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