baseband-devel July 2019

baseband-devel@lists.osmocom.org

2 participants
4 discussions

SMS not received in mobile - Virtual layer1 (osmo-nitb + osmo-bts + osmocom-bb/mobile)
by Sebastian Stumpf 05 Jan '26

05 Jan '26

Hi, Some of my sent SMS are not received by my mobile and I try to figure out if this is a problem with my virtual layer 1, configuration or something in the layers 2+. I use: osmo-nitb: 1 subscriber in hlr (id 1, ext 017519191919) osmo-bts: virt-phy, arfcn 666, TS0=CCCH+SDCCH4, TS1=SDCCH8 MS layer23 app mobile: is the subscriber from osmo-nitb MS layer1 virt-phy: virtual gsmtap layer between bts and mobile I want: Send a sms to subscriber 017519191919. osmo-nitb VTY: OpenBSC# subscriber id 1 sms sender id 1 send Test I have 2 outcomes, first one is the failure. See https://www.dropbox.com/s/eunpfioq518t09a/mobile--ms-virt--bts-virt--bsc-ni… for the pcap. Do not wonder about the duplicated gsmtap messages from mobile, the ones to ip 225.0.0.1 are over virt-phy layer, the ones to localhost from the gsmtap logging option from mobile. Filter them out via "gsmtap && (ip.dst != 127.0.0.1)". 602-613: RR channel establishment with RA and IA as reaction to paging in 590 627,631: SABM from BTS to establish async balanced mode on SAPI3 (SMS) and the ACK from MS 656,684,699: I-Data frames on SAPI3 containing the sms 660,688,703: ReceiveReady's from MS (That ACK all I-frames before N(R)-1 as far as I understood) For me, that looks good and I really do not understand why the MS will not answer with the CP-ACK/RP-ACK after receiving the SMS Data in 699. The LAPDM link will stay up for some more time and be used by the network for retransmission of the sms (1149), but MS will never react to it on the SMS layer (CP-ACK, RP-ACK). Here is the console log for the mobile (https://www.dropbox.com/s/6gug5cd4up5qv7y/mobile--ms-virt--bts-virt--bsc-ni…). The paging is answered in line 378: Fri Mar 10 10:42:06 2017 DLLAPD <0012> lapd_core.c:793 SABM(E) received in state LAPD_STATE_IDLE Second outcome is a successfully sent sms from network to ms. See https://www.dropbox.com/s/ghdn7pc0j4vifbe/mobile--ms-virt--bts-virt--bsc-ni… for the pcap. What is different here? There is no paging, but the sms is sent within the dedicated channel used for the location update initiated by the phone started up. Why there is another outcome, I don't know. 169-181: RR channel establishment with RA and IA as part of mibiles startup routine to make location update 188,416: Location udpdate procedure on SAPI0 230,234: SABM from BTS to establish async balanced mode on SAPI3 (SMS) and the ACK from MS 396,444: I-Data frames on SAPI3 containing the sms 400,449: RR's from MS 450: CP-ACK for BTS 482,499: RP-ACK I-Frames for Network (osmo-nitb) Again, the console log of the mobile (https://www.dropbox.com/s/cujsn40d43g6wxk/mobile--ms-virt--bts-virt--bsc-ni…). The SABM on SAPI3 on downlink is received in line 206: Fri Mar 10 11:06:13 2017 DLLAPD <0012> lapd_core.c:793 SABM(E) received in state LAPD_STATE_IDLE The signaling looks quite similar in both cases, but one time the mobiles sms handler responds to CP-DATA msg containing the SMS, the other time not. Can someone find an error in the signaling I did not see? Is there a known Bug? To be honest, I last merged my branch with master some time ago (~ Jan 18 2017) and thus did not update osmo-nitb and the libraries since then to avoid compatibility problems. Have there been recent changes that could cause that behavior? Thank you and Kind Regards, Sebastian

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Engagetted !
by Sébastien Lorquet 14 Oct '25

14 Oct '25

http://www.engadget.com/2010/12/29/researchers-eavesdrop-on-encrypted-gsm-c… Congrats!

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Calypso BTS
by phreaker1983 16 Nov '19

16 Nov '19

I tried to install CalypsoBTS have libosmocore installed, osmo-bts osmobsc, libosmo-netif, libosmo-abis, ortp, trx, libosmo-dsp everything went without errors, following the instructions I created: touch ~/.osmocom/open-bsc.cfg , then when you run : osmo-nitb -c ~/.osmocom/open-bsc.cfg-l ~/.osmocom/hlr.sqlite3-P-C --debug=DRLL:CC:MM:RR:RSL:NM shows me:<0005> bsc_init.c:498 Failed to parse the config file: '/root/.osmocom/open-bsc.cfg' file tried to create as administrator but without success , pleas help me -- View this message in context: http://baseband-devel.722152.n3.nabble.com/Calypso-BTS-tp4026753.html Sent from the baseband-devel mailing list archive at Nabble.com.

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Osmocom Village at CCC Camp 2019
by Harald Welte 29 Jul '19

29 Jul '19

Dear all, I've been asked by a number of pepole about a possible Osmocom village at the CCC Camp 2019. I personally didn't really have any plans, but given related e-mails and "encouragement" I went ahead and registered an "Osmocom Village", see https://signup.c3assemblies.de/assembly/3b8f7aa2-95d5-4c44-aadc-de8f2680e9c3 I also created a wiki page (as nobody else did, despite earlier discussion on IRC, SCNR) for coordinating related efforts at https://osmocom.org/projects/osmo-dev-con/wiki/CCC_Camp_2019 One of the bigger questions is about having a tent as well as some tables/benches to sit on and work. The Camp orga team nas been negotiating rates with a tent rental company, but to be honest I'm rather surprised by the extremely steep pricing. The smallest possible tent (6m x 3m) would cost 825 EUR. I'm not sure we want to raise that amount of money? Even if we'd be 10 people sharing it, its still 82.50 EUR per person. And that excludes any tables/chairs. I'm attaching the relevant parts of a mail from the assemblies orga team FYI. Please note there also is some kind of fragmentation / overlap with the team planning to run the GSM/3G networks at the camp, see Lynxis' related post at https://lists.osmocom.org/mailman/private/osmocom-event-orga/2019-June/0003… It's questionable whether it makes sense to have tow distinct 'villages', but given that e.g. I don't know anyone of that singularity city, I'm not sure if we'd either be welcome there, nor whether we'd want to associate us with them? Also, while the GSM network operation for sure has good reasons to mingle with the POC and whatever facilities they have, I'm not sure if the wider Osmocom community attendees unrelated to the GSM network operation wouldn't just be a disturbance/nuisance. In the end, to be honest, I personally do not feel I have the time and mental capacity to take on any additional tasks in terms of organizing anything. I just created the entry in c3assemblies as I was asked to, and I similarly created the related mailing list and wiki page. So please, anyone interested in making an Osmocom village happen one way or another, step up [and continue this discussion on the camp2019-village(a)lists.osmocom.org mailing list, without crossposting everywhere else :) 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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baseband-devel July 2019