July 2012 - OpenBSC - lists.osmocom.org

GPRS - local and foreign TLLIs
by Luca Melette 04 Feb '26

04 Feb '26

Hello everybody, after setting up a nanoBTS with OpenBSC/SGSN/GGSN, I had some troubles trying to connect my smartphone to the GPRS cell. Investigating the BTS-to-SGSN traffic, I saw that the frames sent by the SGSN were all marked with the same N(U) value (at LLC layer), the value was 0. With some debug, I found that the there was a mismatch in the TLLI storage, used to keep the status of attached terminals. The mentioned code is contained in gprs_llc.c, involving LL Entity functions and gprs_llc_tx_ui(). /* look-up or create the LL Entity for this (TLLI, SAPI) tuple */ lle = lle_by_tlli_sapi(msgb_tlli(msg), sapi); if (!lle) { struct gprs_llc_llme *llme; LOGP(DLLC, LOGL_ERROR, "LLC TX: unknown TLLI 0x%08x, " "creating LLME on the fly\n", msgb_tlli(msg)); llme = llme_alloc(msgb_tlli(msg)); lle = &llme->lle[sapi]; } The TX function uses the previously received TLLI to lookup for the LLE. The lle_by_tlli_sapi() performs the search, but preliminary it applies a foreign2local TLLI conversion to ensure to have a local one. Since no valid entry for the searched TLLI is found, a new one is created. And the problem is here. The new entry has the foreign TLLI. Next time the lookup fails again, and a new entry is created. This way, the counter N(U) is always reset, and the mobile do not recognize the message sequence and no attach is possible. My question is about foreign and local TLLIs. I patched the lookup, avoiding the conversion, so that the LLE is found and everything works fine... but... What is the sense of the conversion? Should the TLLI be always stored as a local one? Can this problem be solved with another foreign2local while allocating new entries? Actually, my problem has been solved with that workaround. But I'm curious to know what is the right way. Hope somebody can answer :) Thanks. Cheers, LM

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Re: Help with sccp library
by mosbah abdelkader 07 Jul '25

07 Jul '25

> I don't understand. This callback will be called with data you need to write > to the network. In case of MTP Level3 you will need to wrap that around the > msgb you got. I means: is the interaction with mtp3 layer implemented (is sending sccp data by mtp3 implemented by the library?)? Also, what about the reception of data from mtp3 layer. is that implemented in the sccp lib. I am asking these questions because I see the code of mtp3 in the lib but no significant call is present in the sccp part of the lib. Thank you for your help.

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SimpleHLR: A web interface for OpenBSC
by Peter Caprioli 03 Jun '13

03 Jun '13

Hello everyone, I've just finnished writing together a small web interface for the OpenBSC HLR. It allows you to modify various parameters in the database and also provides a set of functions to modify the HLR or sending SMSes in your own scripts. The project is still very alpha but it seems to work reasonably good. Feel free to give any feedback! Screenshots and source code is available on my website: https://stormhub.org/simplehlr/ -- *Best regards, Peter Caprioli*

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Several questions
by jason mercury 06 Dec '12

06 Dec '12

I have some questions: 1) When I start bsc_hack bsc_init.c first establishes OML link and initializes the bts then it establishes RSL link and bts starts broadcasting. However, it takes so much time to start the bts. Instead of this I want to do the following: it establishes OML link at the beginning and only once, then when i want to start broadcasting it establishes just the RSL link and bts will start faster since i don't have to wait for OML link. What should be done for this? 2) If i send one or two word messages from telnet interface it is okay. But if i send a longer message the phone could't receive the end of the message correctly(last words may be incomplete). Did any one encounter with this problem? What is wrong with me? 3) Could I send SMS in which extension of the sender is text not integer. For example, i want to send an information SMS that this is a test network. For this purpose i want to send an SMS from 'OpenBSC'. I set the extension of the first subscriber in database as text and tried to send the SMS but SMS wasn't delivered. What should i do? 4) Can i add SMS externally to SMS table of database? Thanks. Jason

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libosmo-sccp and static archives
by Diego Elio Pettenò 12 Aug '12

12 Aug '12

Hello, I was going on with the autotools cleanup (in order of listing in cgit) but I'm a bit surprised about the libosmo-sccp structure, which contrarily to libosmocore, libosmo-abis and libosmo-dsp is not using libtool, but it's actually building three static archives, with one source file each. Now, I don't know if it might be too late to consider changing this but I'm wondering why it has been done this way; when using a shared object it might make sense (although the overhead of using more than one object is probably higher than loading the unused code), but with static archives all the Unix link editors I know only take by default only the objects that are actually needed by what it's being linked; that is using a single libosmo-sccp.a will only bring in the final linking the object files that are actually needed. I also wonder if it wouldn't make more sense to have everything built in the same project/source tree with libosmocore — in general this seems to be small enough, and the time/space spent for these three files is probably well recovered by the extra ./configure run that it has to run. Let me know if I can be of help — I'll still send the autotools cleanup for this project today I think. -- Diego Elio Pettenò — Flameeyes flameeyes(a)flameeyes.eu — http://blog.flameeyes.eu/

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GN A-Bis test sets on eBay.
by Andrew Back 28 Jul '12

28 Jul '12

Hello, Interesting looking A-Bis test equipment on eBay right now: http://www.ebay.co.uk/itm/GN-EGM-Nettest-35-GSM-A-Bis-Test-Meter-Elmi-EGM35… Appears to be PCM only though and I imagine of limited usefulness. Best, Andrew -- Andrew Back http://carrierdetect.com

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Re: Calls with OpenBSC+LCR+Asterisk
by George News 24 Jul '12

24 Jul '12

Hi, I'm trying to answer this question. I think the issue is just including <linux/export.h>. Here is the additional patch attached. I think someone with access to wiki should update the mISDN.diff. See you Jorge

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Calls with OpenBSC+LCR+Asterisk
by Arturo Rivas 24 Jul '12

24 Jul '12

Hi list! I'm trying make calls between sip phones and mobiles throw OpenBSC but doesn't works. I've registered extensions in Asterisk and mobile phones in OpenBSC. When I try call inter mobile phones and LCR shows (error in red): *000000 DEBUG (in Port() line 149): new port of type 4625, name 'GSM-1-in'* *000000 DEBUG (in PmISDN() line 182): Created new mISDNPort(GSM-1-in). Currently 1 objects use, port #1* *000000 DEBUG (in Pgsm() line 151): Created new GSMPort(GSM-1-in).* *000000 DEBUG (in Pgsm_bs() line 54): Created new GSMBSPort(GSM-1-in).* *000000 TRACE 25.06.12 18:48:30.344 CH(18): MT_NEW_L3ID INDICATION port 1 callref new=0x8000000c* *000000 TRACE 25.06.12 18:48:30.344 CH(18): CHANNEL SELECTION (setup) port 1 channel reserved=0 conclusion 'channel available' connect channel=1* *000000 DEBUG (in seize_bchannel() line 1028): PmISDN(GSM-1-in) seizing bchannel 1 (index 0)* *000000 ERROR (in _bchannel_create() line 415): Error: Failed to bind bchannel-socket for index 0 with mISDN-DSP layer (errno=92). Did you load mISDN_dsp.ko?* *000000 DEBUG (in bchannel_open() line 228): Activating GSM side channel index 0.* *000000 TRACE 25.06.12 18:48:30.345 CH(18): MNCC_SETUP_IND LCR<->BSC port 1 calling number=29848 imsi=460003113237934 dialing number=02000* *000000 DEBUG (in Endpoint() line 48): EPOINT(18): Allocating enpoint 18 and connecting it with: ioport* *000000 DEBUG (in portlist_new() line 146): EPOINT(18) allocating port_list. * *000000 DEBUG (in epointlist_new() line 125): PORT(18) allocating epoint_list.* *000000 TRACE 25.06.12 18:48:30.345 CH(18): unknown LCR<->BSC port 1 mode 0x01* *000000 TRACE 25.06.12 18:48:30.345 CH(18): MNCC_CALL_PROC_REQ LCR<->BSC port 1 progress coding=3 location=1 descr=8* *000000 DEBUG (in new_state() line 252): PORT(GSM-1-in) new state PORT_STATE_IDLE --> PORT_STATE_IN_PROCEEDING* *000000 TRACE 25.06.12 18:48:30.345 CH(18): unknown LCR<->BSC port 1* *000000 DEBUG (in message_put() line 61): message MESSAGE_SETUP written from 18 to 18 (memory 8ccc588)* *000000 DEBUG (in message_get() line 107): message MESSAGE_SETUP reading from 18 to 18 (memory 8ccc588)* *000000 DEBUG (in ea_message_port() line 2649): EPOINT(18) incoming call from callerid=29848, dialing=02000* *000000 TRACE 25.06.12 18:48:30.345 EP(18): SETUP from CH(18) caller id number=29848 present=allowed dialing 02000 complete true* *000000 DEBUG (in port_setup() line 1535): EPOINT(18) incoming call is external or voip* *000000 DEBUG (in port_setup() line 1616): EPOINT(18) call from external port* *000000 DEBUG (in message_put() line 61): message MESSAGE_TONE written from 18 to 18 (memory 8ccfe40)* *000000 TRACE 25.06.12 18:48:30.345 EP(18): TONE to CH(18) directory default name dialing* *000000 DEBUG (in process_dialing() line 2300): EPOINT(18): terminal '' dialing: '02000', checking matching rule of ruleset 'main'* *000000 DEBUG (in route() line 1914): parsing ruleset 'main'* *000000 DEBUG (in route() line 1916): checking rule in line 8* *000000 TRACE 25.06.12 18:48:30.345 EP(18): ACTION (match) action remote line 8* *000000 DEBUG (in process_dialing() line 2324): EPOINT(18): a rule with action 'remote' matches.* *000000 DEBUG (in process_dialing() line 2361): EPOINT(18): terminal : current action 'remote' has a init function, so we call it...* *000000 DEBUG (in process_dialing() line 2372): EPOINT(18): terminal '' action: remote (dialing '02000')* *000000 DEBUG (in process_dialing() line 2375): EPOINT(18): terminal : current action 'remote' has a dialing function, so we call it...* *000000 DEBUG (in _action_init_call() line 34): EPOINT(18): Creating new join instance.* *000000 TRACE 25.06.12 18:48:30.346 EP(18): ACTION remote (not available) applicatio astersik* *000000 DEBUG (in message_put() line 61): message MESSAGE_DISCONNECT written from 18 to 18 (memory 8cd36f8)* *000000 TRACE 25.06.12 18:48:30.346 EP(18): DISCONNECT to CH(18) cause value=27 location=1-Local-PBX* *000000 DEBUG (in message_put() line 61): message MESSAGE_TONE written from 18 to 18 (memory 8cd6fb0)* *000000 TRACE 25.06.12 18:48:30.346 EP(18): TONE to CH(18) directory default name cause_1b* *000000 DEBUG (in message_get() line 107): message MESSAGE_TONE reading from 18 to 18 (memory 8ccfe40)* *000000 DEBUG (in message_epoint() line 602): PORT(GSM-1-in) isdn port with (caller id 29848) setting tone 'dialing' dir ''* *000000 DEBUG (in set_tone() line 1532): isdn port now plays tone:'dialing'. * *000000 DEBUG (in message_get() line 107): message MESSAGE_DISCONNECT reading from 18 to 18 (memory 8cd36f8)* *000000 TRACE 25.06.12 18:48:30.346 CH(18): MNCC_DISC_REQ LCR<->BSC port 1 progress coding=3 location=1 descr=8 cause coding=3 location=1 value=27* *000000 DEBUG (in new_state() line 252): PORT(GSM-1-in) new state PORT_STATE_IN_PROCEEDING --> PORT_STATE_OUT_DISCONNECT* *000000 DEBUG (in message_epoint() line 778): Pgsm_bs(GSM-1-in) gsm port with (caller id 29848) received unhandled nessage: 11* *000000 DEBUG (in message_get() line 107): message MESSAGE_TONE reading from 18 to 18 (memory 8cd6fb0)* *000000 DEBUG (in message_epoint() line 602): PORT(GSM-1-in) isdn port with (caller id 29848) setting tone 'cause_1b' dir ''* *000000 DEBUG (in set_tone() line 1532): isdn port now plays tone:'cause_1b'.* *000000 TRACE 25.06.12 18:48:40.552 CH(18): MNCC_REL_IND LCR<->BSC port 1 cause coding=3 location=0 value=16* *000000 DEBUG (in message_put() line 61): message MESSAGE_RELEASE written from 18 to 18 (memory 8ccaf90)* *000000 DEBUG (in free_epointlist() line 81): PORT(18) removed epoint from port* *000000 DEBUG (in new_state() line 252): PORT(GSM-1-in) new state PORT_STATE_OUT_DISCONNECT --> PORT_STATE_RELEASE* *000000 DEBUG (in message_get() line 107): message MESSAGE_RELEASE reading from 18 to 18 (memory 8ccaf90)* *000000 DEBUG (in ea_message_port() line 2735): EPOINT(18) release with cause=16 location=0 (terminal '', caller id '29848')* *000000 TRACE 25.06.12 18:48:40.552 EP(18): RELEASE from CH(18) cause value=16 location=0-User* *000000 DEBUG (in port_disconnect_release() line 2207): EPOINT(18) current multipoint cause 0 location 0, received cause 16 location 0.* *000000 DEBUG (in port_disconnect_release() line 2209): EPOINT(18) new multipoint cause 16 location 0.* *000000 DEBUG (in process_hangup() line 2420): EPOINT(18): terminal ''* *000000 DEBUG (in process_hangup() line 2500): EPOINT(18): terminal : current action 'remote' has a hangup function, so we call it...* *000000 TRACE 25.06.12 18:48:40.553 EP(18): ACTION hangup* *000000 DEBUG (in free_portlist() line 185): EPOINT(18) removed port_list from endpoint* *000000 DEBUG (in release() line 215): EPOINT(18): do pending release (joincause 16 location 0)* *000000 DEBUG (in release() line 233): EPOINT(18) do pending release (portcause 16 portlocation)* *000000 DEBUG (in release() line 310): EPOINT(18) do pending release of epoint itself.* *000000 DEBUG (in ~Pgsm_bs() line 62): Destroyed GSM BS process(GSM-1-in).* *000000 DEBUG (in ~Pgsm() line 159): Destroyed GSM process(GSM-1-in).* *000000 DEBUG (in drop_bchannel() line 1063): PmISDN(GSM-1-in) dropping bchannel* *000000 DEBUG (in ~PmISDN() line 213): destroyed mISDNPort(GSM-1-in). Currently 0 objects* *000000 DEBUG (in ~Port() line 210): removing port of type 4625, name 'GSM-1-in'* *000000 DEBUG (in ~Endpoint() line 134): removed endpoint 18.* * * I've tried: *rivas@pfc:/etc/asterisk$ sudo modprobe mISDN_dsp* *FATAL: Error inserting mISDN_dsp (/lib/modules/3.2.0-24-generic-pae/extra/mISDN_dsp.ko): Unknown symbol in module, or unknown parameter (see dmesg) * Osmo-NITB shows: *<000b> bsc_api.c:349 Sending ChanModify for speech 1 1* *<0001> gsm_04_08.c:1575 Error: RTP proxy is disabled* *<000b> osmo_msc.c:73 Assignment complete should not have been reached.* * * In Asterisk I've configure extensions like the howto: *exten => _02X.,1,GotoIf($[${CALLERID(name)} != ""]?4)* *exten => _02X.,2,Set(CALLIDORIG=${CALLERID(num)})* *exten => _02X.,3,Set(CALLERID(num)=02${CALLIDORIG})* *exten => _02X.,4,Dial(LCR/GSM/${EXTEN:2},120)* * * Extensions number are 02000 and 02001 respectively. Please help me. I believe that the problem is not in asterisk because its CLI doesn't shows anything. Thank you!

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Poll: Osmocom meeting 25th of July?
by Harald Welte 23 Jul '12

23 Jul '12

Hi all! On Wednesday, 25th of July we would have the next Osmocom meeting berlin. However, neither Holger nor I will be in Berlin on that day to host the event. I also know that Tobias will not be in Berlin. Nonetheless, if there are other people that want to meet up, there is no reason to not hold it! So I would like to get some feedback on who would want to attend next wednesday. If there are a couple of people, I'll try to find somebody who can open the CCCB for you. 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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nanoBTS models.
by Andrew Back 17 Jul '12

17 Jul '12

Hello, Am I right in thinking that a nanoBTS supports only one band and this cannot be changed, so a 165B version would be no use in Europe? Regards, Andrew -- Andrew Back http://carrierdetect.com

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