Pau Espin
3278f0fb3c
Once the IuUP FSM moved away from Init state, it stopped handling Initialization messages received from peers and simply ignored them starting from that point. As a result, if the first IuUP Init ACK it sent to the peer was lost, the peer would keep retrying with more IuUP Init and getting no answer. In any case, it seems possible and desirable that a peer may send an IuUP Init at a later point, as pointed out vaguely in 3GPP TS 25.415. sec 6.5.2.1: """ Upon reception of a frame indicating that an Initialisation procedure is active in the peer Iu UP entity, the Iu UP protocol layer forwards the whole protocol information contained in the INITIALISATION control frame to the upper layers. It also stores the RAB sub-Flow Combination set (and thus replaces a possible previous set) in order to control during the transfer of user data, that the Iu UP payload is correctly formatted (e.g. RFCI matches the expected Iu UP frame payload total length). The peer Iu UP entity receiving the INITIALISATION control frame shall choose a version that it supports among the proposed versions indicated by the sender for which it has enough initialisation information. """ sec B.2.2 "Initialisation State": """ After sending a positive acknowledgement of the last INITIALISATION control frame, the Iu UP instance enters SMpSDU data transfer ready state. Note that CN does not know if the initialisation ACK was correctly received by the RNC (and Initialisation procedure successfully completed) until it receives RAB assignment response, or use data from the RNC. The CN must therefore be able to continue receiving INITIALISATION control frames by re-entering the Initialisation state (from Support Mode Data Transfer Ready State), if the CN has started to send user data before receiving the indication that Initialisation was successfully completed """ sec B.2.3 "Support Mode Data Transfer Ready State": """ In case of handover or relocation, Initialisation procedures may have to be performed and Iu UP instance may have to enter the initialisation state. """ Related: SYS#5995 Change-Id: I5cb740702805693cc7f0a550e2e093f9bfdd507c |
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| Doxyfile.codec.in | ||
| Doxyfile.coding.in | ||
| Doxyfile.core.in | ||
| Doxyfile.ctrl.in | ||
| Doxyfile.gb.in | ||
| Doxyfile.gsm.in | ||
| Doxyfile.vty.in | ||
| Makefile.am | ||
| README.md | ||
| TODO-RELEASE | ||
| configure.ac | ||
| git-version-gen | ||
| libosmocodec.pc.in | ||
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| libosmocore.pc.in | ||
| libosmoctrl.pc.in | ||
| libosmogb.pc.in | ||
| libosmogsm.pc.in | ||
| libosmosim.pc.in | ||
| libosmousb.pc.in | ||
| libosmovty.pc.in | ||
| osmo-release.mk | ||
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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