d8e8ea9c8f
Go through all callers of as_dl_tbf() and as_ul_tbf(), and make sure they can handle the possible NULL return value. OS#5205 reports a NULL deref crash of osmo-pcu at pdch.cpp:525. The immediate cause is that as_dl_tbf() may well return NULL, which this caller does not handle and instead dereferences immediately. This is a code path that apparently assumes that a DL-TBF should always be present. The higher level cause for the NULL DL-TBF has not been identified. Related: OS#5205 SYS#5561 Change-Id: I8ce21be6836549b47a606c00b793d6f005964c5c |
||
---|---|---|
contrib | ||
debian | ||
doc | ||
include | ||
src | ||
tests | ||
.gitignore | ||
.gitreview | ||
COPYING | ||
Makefile.am | ||
README.md | ||
TODO | ||
TODO-RELEASE | ||
configure.ac | ||
git-version-gen | ||
osmoappdesc.py |
README.md
osmo-pcu - Osmocom Packet Control Unit
This repository contains a C/C++-language implementation of a GPRS Packet Control Unit, as specified by ETSI/3GPP. It is part of the Osmocom Open Source Mobile Communications project.
The Packet Control Unit is terminating the Layer 2 (RLC/MAC) of the GPRS radio interface and adapting it to the Gb Interface (BSSGP+NS Protocol) towards the SGSN.
The PCU interfaces with the physical layer of the radio interface. OsmoPCU is typically used co-located with the BTS, specifically OsmoBTS. For legacy BTSs that run proprietary sotware without an interface to OsmoPCU, you may also co-locate it with the BSC, specifically OsmoBSC
Homepage
The official homepage of the project is https://osmocom.org/projects/osmopcu/wiki/OsmoPCU
GIT Repository
You can clone from the official osmo-pcu.git repository using
git clone git://git.osmocom.org/osmo-pcu.git
There is a cgit interface at http://git.osmocom.org/osmo-pcu/
Documentation
We provide a user manual as well as a vty reference manual
Please note that a lot of the PCU configuration actually happens inside the BSC, which passes this configuration via A-bis OML to the BTS, which then in turn passes it via the PCU socket into OsmoPCU.
Mailing List
Discussions related to osmo-pcu are happening on the osmocom-net-gprs@lists.osmocom.org mailing list, please see https://lists.osmocom.org/mailman/listinfo/osmocom-net-gprs 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 osmo-pcu can be seen at https://gerrit.osmocom.org/#/q/project:osmo-pcu+status:open
Current limitations
- No PFC support
- No fixed allocation support (was removed from 3GPP Rel >= 5 anyway)
- No extended dynamic allocation support
- No unacknowledged mode operation
- Only single slot assignment on uplink direction
- No half-duplex class support (only semi-duplex)
- No TA loop
- No power loop
- Multi-BTS support not tested