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Osmocom Packet control Unit (PCU): Network-side GPRS (RLC/MAC); BTS- or BSC-colocated https://osmocom.org/projects/osmopcu
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Holger Hans Peter Freyther 9d938388f6 emu: Add a crash re-producer for the SGSN (and the concept of tests) 
Introduce the concept of tests that will be ran one after the other.
This new test will send static message that will lead to the opening
of a PDP context. At this point one should use ping with a large
packet size and suspend/stop the emulator. Once the NS connection is
considered dead the SGSN will crash with a double free.

Reproduce:
0.) Add IMSI 901700000003094 to the ACL
1.) Stop/Suspend the emulation process so the NS Alive times out
2.) Use ping IP -s 2048

This will create a double free...

 #4  0xb7bb2646 in talloc_abort_double_free () at talloc.c:175
 #5  0xb7bbd41a in talloc_chunk_from_ptr (ptr=0x8091208) at talloc.c:190
 #6  _talloc_free (ptr=0x8091208) at talloc.c:517
 #7  talloc_free (ptr=ptr@entry=0x8091208) at talloc.c:990
 #8  0xb7bb319b in msgb_free (m=m@entry=0x8091208) at msgb.c:72
 #9  0x0804db54 in sndcp_send_ud_frag (fs=0xbfffcc6c) at gprs_sndcp.c:423
 #10 sndcp_unitdata_req (msg=msg@entry=0x808eed8, lle=0x808fbc8, nsapi=5 '\005',
    mmcontext=mmcontext@entry=0x80903e8) at gprs_sndcp.c:471
 		2013-09-04 21:29:00 +04:00
examples add missing examples/Makefile.am 2013-01-11 18:03:25 +01:00
src bssgp: Add callback UNITDATA.DL messaes with the data 2013-09-04 21:28:53 +04:00
tests emu: Add a crash re-producer for the SGSN (and the concept of tests) 2013-09-04 21:29:00 +04:00
.gitignore emu: Create an app that allows to communicate with a SGSN 2013-09-04 21:28:53 +04:00
COPYING import GPLv2 license text to this project 2012-07-22 22:05:44 +02:00
Makefile.am tests: Create tests directory and move the VTY testing into there 2013-08-02 13:39:55 +04:00
README Doc: Update on README and tbf.txt 2012-12-18 10:04:03 +01:00
configure.ac tests: Move the RLCMACTest into the test directory and setup autotest 2013-08-02 13:40:20 +04:00
git-version-gen Add auto-foo (partial cleanup, master makefile/configure.ac 2012-06-14 21:05:44 +08:00
osmoappdesc.py Added conditional python-based tests for VTY/config handling 2013-04-06 11:00:20 +02:00

README 

This is an implementation of Packet Control Unit (PCU) according to TS 04.60

The PCU is part of BSS, so it connects directly to SGSN.


== Current limitations ==

 * No PFC support
 * No fixed allocation support
 * No extended dynamic allocation support
 * No unacknowledged mode operation
 * No PCCCH/PBCCH support
 * Only single slot assignment on uplink direction
 * No half-duplex class support (only semi-duplex)
 * No handover support
 * No measurement support
 * No TA loop
 * No power loop
 * No CS loop
 * No EGPRS