OpenBSC

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Notes from the 27C3 network
by Holger Hans Peter Freyther 31 Dec '10

31 Dec '10

Hi all, here are some notes about bsc_hack as it ran on the 27C3. In day0 we discovered a nice SQL injection bug, in day1 we had plenty of segfaults, mostly in the error and time-out paths of the MSC (but also some in the BSC API). These included crashes due clearing the channel and removing the ->lchan from the conn, RLL time out handling in the SMS code and some more. The network ran without segfault (only one crash due my stupidity on a new VTY command) after this. The biggest issue as that SMS got stuck. Code review has found some issues immediately but this didn't fix it. On more code review an issue with the 'subscr_get_channel' was identified. First of all the transaction layer just stopped paging requests, e.g. stopping the paging for someone else's subscr_get_channel, then the Call Control code never called subscr_put_channel when it is done. I have created two band aids for this situation but there is a bigger issue with the code. If somebody has spare time and wants to do some simple changes one can do: 1.) The subscriber layer passes the 'subscr' pointer to the paging layer, it should pass the request to it. 2.) It should be possible to cancel channel requests that were not scheduled yet. 3.) Once we started auth on the channel the 'request' state should be changed too. It is not right now due 1.). 4.) ....

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AW: OpenBSC Digest, Vol 24, Issue 26
by Lud Gidiya 29 Dec '10

29 Dec '10

--- openbsc-request(a)lists.gnumonks.org <openbsc-request(a)lists.gnumonks.org> schrieb am Mo, 27.12.2010: Von: openbsc-request(a)lists.gnumonks.org <openbsc-request(a)lists.gnumonks.org> Betreff: OpenBSC Digest, Vol 24, Issue 26 An: openbsc(a)lists.gnumonks.org Datum: Montag, 27. Dezember, 2010 13:00 Uhr Send OpenBSC mailing list submissions to openbsc(a)lists.gnumonks.org To subscribe or unsubscribe via the World Wide Web, visit https://lists.gnumonks.org/mailman/listinfo/openbsc or, via email, send a message with subject or body 'help' to openbsc-request(a)lists.gnumonks.org You can reach the person managing the list at openbsc-owner(a)lists.gnumonks.org When replying, please edit your Subject line so it is more specific than "Re: Contents of OpenBSC digest..." Today's Topics: 1. RE: OpenBSC+LCR+Asterisk installation problem (Caleb Pal) ---------------------------------------------------------------------- Message: 1 Date: Sun, 26 Dec 2010 14:41:39 -0800 From: "Caleb Pal" <cleb(a)defcon-3.net> Subject: RE: OpenBSC+LCR+Asterisk installation problem To: "'jason mercury'" <jmercury313(a)gmail.com>, <openbsc(a)lists.gnumonks.org> Message-ID: <004901cba54e$0ffe0950$2ffa1bf0$@net> Content-Type: text/plain; charset="us-ascii" Are you using Asterisk 1.8? If so, you should checkout the asterisk_1_8 branch of LCR. LCR git was down, it is now back up at a slightly different location, git://git.misdn.org/lcr.git/. mISDN and mISDNuser git are also at the new path. HTH, Caleb From: openbsc-bounces(a)lists.gnumonks.org [mailto:openbsc-bounces@lists.gnumonks.org] On Behalf Of jason mercury Sent: Thursday, December 23, 2010 8:15 AM To: openbsc(a)lists.gnumonks.org Subject: OpenBSC+LCR+Asterisk installation problem Hi, I am trying to install a OpenBSC+LCR+Asterisk system according to the how to send to the mail list by Konrad Meier on Tue Oct 12 18:27:33 2010. During installation of LCR I got following error: make[1]: Entering directory `/home/idb/openbsc/lcr' gcc -DWITH_GSM_BS -I./openbsc/include -I./libosmocore/include -I./openbsc -Wall -DCONFIG_DATA="\"/usr/local/lcr\"" -DSHARE_DATA="\"/usr/local/lcr\"" -DLOG_DIR="\"/usr/local/lcr\"" -DEXTENSION_DATA="\"/usr/local/lcr/extensions\"" -D_GNU_SOURCE -fPIC -c chan_lcr.c -o chan_lcr.po chan_lcr.c: In function 'lcr_indicate': chan_lcr.c:2274: warning: assignment from incompatible pointer type chan_lcr.c:2289: warning: assignment from incompatible pointer type chan_lcr.c:2316: warning: assignment from incompatible pointer type chan_lcr.c:2381: error: dereferencing pointer to incomplete type chan_lcr.c:2382: error: dereferencing pointer to incomplete type chan_lcr.c: In function 'load_module': chan_lcr.c:2818: warning: passing argument 2 of 'ast_register_application2' from incompatible pointer type /usr/include/asterisk/module.h:427: note: expected 'int (*)(struct ast_channel *, void *)' but argument is of type 'int (*)(struct ast_channel *, void *)' make[1]: *** [chan_lcr.po] Error 1 make[1]: Leaving directory `/home/idb/openbsc/lcr' make: *** [all] Error 2 Why is this occur? My ubuntu kernel is 2.6.32-24-generic and i exactly followed the steps. I am attaching that how to again. I also couldn't git check out OpenBSC, LCR , mISDN, mISDNuser and i download them from http://www.linux-call-router.de/download/lcr-1.7/. I want to ask that why i can't git clone. When i try to git clone i take following: git clone git://git.misdn.org/git/lcr.git/ Initialized empty Git repository in /home/idb/op/lcr/.git/ fatal: The remote end hung up unexpectedly If any you have idea please help. Thanks. Jason.

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Open BSC sources...
by Omar Atia 28 Dec '10

28 Dec '10

Dear All, I will introduce myself , It is Omar Atia from Lebanon , 8 years telecom experience , willing to know more about open BSC , how can I get the sources if it is free download them (not through unix), from where could I buy the BTS stations are they available it has been sold out as written on the web site . can we configure OpenBTS with OpenBSC ? is it configurable or not tested yet . I have a lot of questions related to this Area as I want to implement the GSM network for testing purposes only to go deeply into it . Thanks,,, Omar Atia TPSG - Functional Consultant ITS Logo.png T. + (961) 9 641555 ext. 416 M. + (961) 3 001294 F. + (961) 9 641555 ext. 217 degital signeture.pngE. <mailto:omar.atia@its.ws> omar.atia(a)its.ws

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OpenBSC+LCR+Asterisk installation problem
by jason mercury 26 Dec '10

26 Dec '10

Hi, I am trying to install a OpenBSC+LCR+Asterisk system according to the how to send to the mail list by Konrad Meier on *Tue Oct 12 18:27:33 2010. *During installation of LCR I got following error: make[1]: Entering directory `/home/idb/openbsc/lcr' gcc -DWITH_GSM_BS -I./openbsc/include -I./libosmocore/include -I./openbsc -Wall -DCONFIG_DATA="\"/usr/local/lcr\"" -DSHARE_DATA="\"/usr/local/lcr\"" -DLOG_DIR="\"/usr/local/lcr\"" -DEXTENSION_DATA="\"/usr/local/lcr/extensions\"" -D_GNU_SOURCE -fPIC -c chan_lcr.c -o chan_lcr.po chan_lcr.c: In function ‘lcr_indicate’: chan_lcr.c:2274: warning: assignment from incompatible pointer type chan_lcr.c:2289: warning: assignment from incompatible pointer type chan_lcr.c:2316: warning: assignment from incompatible pointer type chan_lcr.c:2381: error: dereferencing pointer to incomplete type chan_lcr.c:2382: error: dereferencing pointer to incomplete type chan_lcr.c: In function ‘load_module’: chan_lcr.c:2818: warning: passing argument 2 of ‘ast_register_application2’ from incompatible pointer type /usr/include/asterisk/module.h:427: note: expected ‘int (*)(struct ast_channel *, void *)’ but argument is of type ‘int (*)(struct ast_channel *, void *)’ make[1]: *** [chan_lcr.po] Error 1 make[1]: Leaving directory `/home/idb/openbsc/lcr' make: *** [all] Error 2 Why is this occur? My ubuntu kernel is 2.6.32-24-generic and i exactly followed the steps. I am attaching that how to again. I also couldn't git check out OpenBSC, LCR , mISDN, mISDNuser and i download them from http://www.linux-call-router.de/download/lcr-1.7/. I want to ask that why i can't git clone. When i try to git clone i take following: git clone git://git.misdn.org/git/lcr.git/ Initialized empty Git repository in /home/idb/op/lcr/.git/ fatal: The remote end hung up unexpectedly If any you have idea please help. Thanks. Jason.

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AW: OpenBSC / lcr integration through unix domain socket
by Andreas.Eversberg 23 Dec '10

23 Dec '10

> The lcr side is less finished, especially > * it will not drop all calls when the OpenBSC [socket] goes away > * it will not re-connect if OpenBSC has disappeared > I hope those can still be adressed properly ahead of 27C3. Andreas: Not sure > if you have some time to look at it. I'll be working on higher priority > items for the 27C3 deployment tomorrow... hi harald, good work. i hope we can complete it before 27c3. (my priority is on packing/preparing for 27c3.) the missing things i will implement then. also i will do the same thing for osmocom-bb. then i will merge everything with the "develop" branch of lcr. best regards, andreas

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Regarding implementation of RLC/MAC in open BSC
by satishn 23 Dec '10

23 Dec '10

hi , Im new to Open BSC .In your website it is given that "have the BTS interoperate a SGSN with Gb (NS-over-IP) interface " Does this mean that PCU Stacks(RLC/MAC,BSSGP and NS) are implemented at the BTS. Does Open BSC support PCU stacks. Kindly respond. Regards Satish N

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OpenBSC / lcr integration through unix domain socket
by Harald Welte 23 Dec '10

23 Dec '10

Hi! I've finally taken up the taks to split the 'siamese twin' of linking lcr with bsc_hack and replace it with a PF_UNIX, SOCK_SEQPACKET socket. I've done quite a bit of testing and it seems to work fine. The bsc_hack side is complete, i.e. it properly handles the loss of the lcr connection and drops all CC transactions at that point. The lcr side is less finished, especially * it will not drop all calls when the OpenBSC [socket] goes away * it will not re-connect if OpenBSC has disappeared I hope those can still be adressed properly ahead of 27C3. Andreas: Not sure if you have some time to look at it. I'll be working on higher priority items for the 27C3 deployment tomorrow... The openbsc code is in the laforge/mncc_sock branch of openbsc.git The lcr code can be found in the mncc_sockk branch of the unofficial lcr.git repo at git://git.osmocom.org/lcr.git Regards, Harald -- - Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)

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AW: mISDN-problem
by Andreas.Eversberg 20 Dec '10

20 Dec '10

> newbie question: what does this dmesg mean? hi thomas, this happens, if the user space process does not read from the b-channel socket. since the b-channels have no flow control, the packets get dropped and an error message is printed by the kernel. what program do you use? andreas

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hlrsync.py question
by Thomas Ansorg 18 Dec '10

18 Dec '10

hi someone please tell a linux newbie like me: what this script does and how it is executed (hlrsync hlr.sqlite3 dont work) i'm just at the beginning of learning pearl,python and other script stuff T. -- Wer Rechtschreibfehler findet, darf sie behalten!

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mISDN-problem
by Thomas Ansorg 17 Dec '10

17 Dec '10

hello newbie question: what does this dmesg mean? T. -- Wer Rechtschreibfehler findet, darf sie behalten!

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