OpenBSC February 2022

openbsc@lists.osmocom.org

6 participants
19 discussions

Re: Help with sccp library
by mosbah abdelkader 08 Jul '25

08 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.

4 3

dynamic traffic channels
by Neels Hofmeyr 20 May '25

20 May '25

On Tue, Jun 28, 2016 at 10:05:28AM +0200, Harald Welte wrote: > [translated from german] > is it certain that we switch a channel to PDCH only when > gprs mode != none? A TS can be GSM_PCHAN_TCH_F_PDCH; those are the only ones for which we send a PDCH ACT message. We send a PDCH ACT message - during init (CHANNEL OML's state changed to enabled -> send PDCH ACT), - and upon channel release ack when pchan == GSM_PCHAN_TCH_F_PDCH. So the question is, when we receive a channel release ack, could that be the PDCH release and we switch PDCH right back on by accident? No, because we only receive a chan rel ack when the *TCH/F* is being released. That is because the PDCH release is initiated "internally" from the PDCH DEACT, and thus this condition in common/rsl.c rsl_tx_rf_rel_ack() catches on, which existed before dyn PDCH: if (lchan->rel_act_kind != LCHAN_REL_ACT_RSL) { LOGP(DRSL, LOGL_NOTICE, "%s not sending REL ACK\n", gsm_lchan_name(lchan)); return 0; } In rsl_rx_rf_chan_rel() the rel_act_kind is set to LCHAN_REL_ACT_RSL, but not in the rsl_rx_dyn_pdch(). This is analogous to the ip.access way -- the ip.access nanobts replies to a PDCH DEACT with a PDCH DEACT ACK and doesn't send a separate channel release ack. Maybe we could set rel_act_kind to some new LCHAN_REL_ACT_IPAC_DYN_PDCH for clarity? (But we shouldn't actually send a release ack, to stay compatible.) Even though it works as-is, we should indeed add another flag check: - We do check the flags that no ACT/DEACT is already pending; - And we do send a PDCH DEACT only if ts->flags & TS_F_PDCH_ACTIVE; - But we would send a PDCH ACT despite ts->flags & TS_F_PDCH_ACTIVE. This should never happen, but it would make sense to ensure that. ~Neels

3 5

Problem while running NIB on Open Cellular Base sation
by Brackley Casinga 31 Jan '24

31 Jan '24

Hi, My name is Brackley Cassinga Form DRC, we run a community network called pamoja net where we offer gsm services using osmocom open source software and OC Base station. Recently I have tried to install another base station as the same installed but I could not find any resource guiding through all the steps to take to run NIB on a base station. I'm currently running Ubuntu and I will appreciate if you could guide me on the installation of BSC,hlr,MSC , in order to run a basic gsm network. Thank you. Regards -- *Ir Brackley heshima Casinga **Pacifique* *CEO and Founder of kwanzatechnologie* KwanzaTechnologies ,GlobalElectronics +243977265291 | +243977265291 | Pcassinga(a)gmail.com/ brackley(a)ensemblepourladifference.org www.kwantechnologies.jimdosite.com <http://www.kwantechnologies.com/> | Skype: Brackley cassinga <https://webapp.wisestamp.com/#> Av Semliki N 43

2 1

RFC: migrating git.osmocom.org to gitea?
by Harald Welte 01 Apr '22

01 Apr '22

Hi all! [please follow-up-to the openbsc(a)lists.osmocom.org mailing list, if there is any discussion, we don't want to drag it over tons of mailing lists in parallel] Some weeks ago, I created https://osmocom.org/issues/5397 but it seems nobody noticed the ticket or had any comments to it. So let me post this as RFC here on the mailing list: In the past, we had a gitolite/gitosis setup, which was fine in the early days of git, but it means that people cannot easily create new repositories, see who has permissions, and we cannot delegate ownership. Even updating SSH keys requires manual interaction of a sysadmin like me. I would therefore suggest to migrate git.osmocom.org to gitea[1] This would allow the following features: * users can self-create any number of personal repositories (like gitlab/github) * we can create 'organizations' along the line of reasonably independent osmocom member projects like op25, who can then manage their own repos/permissions/... * gitea can link to redmine wiki and redmine issue trackers (rather than using its own built-in) For those repositories hosted in gerrit (mainly CNI), we would still keep git.osmocom.org a read-only mirror, like we do it right now. For those repositories not hosted in gerrit, users/projects could then accept merge requests in gitea. Coupling this with 3rd party authentication via github/gitlab/etc should make it easier for the occasional contributor to submit changes. There is a downside, of course; A lot of repo URLs have to change. Most of our current repositories are at git.osmocom.org/project.git while gitea follows a git.osmocom.org/organization/project.git scheme. I'm not sure there is any way to help to mitigate this... Any thoughts, comments? [1] https://gitea.io/ -- - Harald Welte <laforge(a)osmocom.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)

5 5

OsmoDevCon 2022 ?
by Harald Welte 11 Mar '22

11 Mar '22

Dear fellow Osmocom developers, as you all know, we've sadly had to skip OsmoDevCon 2020 and 2021, trying to compensate it at least to some extent with our OsmoDevCall every two weeks. The COVID-19 pandemic is far from over, and we don't know what the upcoming winter season will bring. Nevertheless, I think it would be a good idea to start a discussion of whether we should plan for an OsmoDevCon in 2022. I personally would say let's plan for the usual late April 2022 time frame, and if the pandemic situation deteriorates, we can still cancel it with something like one month lead time. I would also personally suggest to limit attendance to people who are fully vaccinated, and in addition do a self-test for all participants every morning. In terms of venue, we might also consider to move to a venue that allows better ventilation. Irrespective of the above we can also bring the air filters from the sysmocom office. So with that as an input statement, I would like to hear your opinion on the above proposals. Who would want to attend? Any complaints against the "vaccinated only plus daily self-tests in the morning" approach? Regards, Harald -- - Harald Welte <laforge(a)osmocom.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)

9 22

OsmoDevCall on Feb 25, 2022: Advanced SIM topics: SCP02, OTA, ARA-M, ISIM
by Harald Welte 25 Feb '22

25 Feb '22

Dear Osmocom community, It's my pleasure to announce the next OsmoDevCall on February 25, 2022 at 20:00 CET at https://meeting5.franken.de/b/har-xbc-bsx-wvs (URL has changed!) In this edition, I will present about a number of "advanced" SIM card topics, such as GlobalPlatform SCP02, OTA, ARA-M and the ISIM applet. This meeting will have the following schedule: 20:00 meet + greet 20:10 talk on advanced SIM topics by @laforge 21:00 unstructured supplementary social event [*] Attendance is free of charge and open to anyone with an interest in Osmocom or open source cellular technologies. More information about OsmoDevCall, including the schedule for further upcoming events can be found at https://osmocom.org/projects/osmo-dev-con/wiki/OsmoDevCall Looking forward to meeting you on Friday. Best regards, Harald [*] this is how we started to call the "unstructured" part of osmocom developer conferences in the past, basically where anyone can talk about anything, no formal schedule or structure. -- - Harald Welte <laforge(a)osmocom.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)

1 0

OsmoDevCall on Feb 11, 2022: No presentation, just USSE
by Harald Welte 10 Feb '22

10 Feb '22

Dear Osmocom community, It's my pleasure to announce the next OsmoDevCall on February 11, 2022 at 20:00 CET at https://meeting5.franken.de/b/har-xbc-bsx-wvs (URL has changed!) In this edition, we will not have a presentation, as unfortunately nobody has volunteered to present this time. Nevertheless, we will still have the call in case anyone wants to chat about random stuff. This meeting will have the following schedule: 20:00 meet + greet 20:10 unstructured supplementary social event [*] Attendance is free of charge and open to anyone with an interest in Osmocom or open source cellular technologies. More information about OsmoDevCall, including the schedule for further upcoming events can be found at https://osmocom.org/projects/osmo-dev-con/wiki/OsmoDevCall Looking forward to meeting you on Friday. Best regards, Harald [*] this is how we started to call the "unstructured" part of osmocom developer conferences in the past, basically where anyone can talk about anything, no formal schedule or structure. -- - Harald Welte <laforge(a)osmocom.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)

1 0

Re: RFC: migrating git.osmocom.org to gitea?
by ikjtel 08 Feb '22

08 Feb '22

Hello Harald & Co. This sounds like a positive development. If there is any resulting trouble(s) we'll deal with it if / as nec. Let me take this opportunity to thank you and Osmocom for hosting OP25. Best Regards Max

1 0

Applet not showing up after 9000 INSTALL for install
by Sabyrzhan Tasbolatov 05 Feb '22

05 Feb '22

Hello, I need help to understand my problem installing a simple HelloWorld applet on USIM card. There is already a USIM applet (AID: a0000000871002ffXXffXX89) running there, so perhaps that's the issue. 1. Should I remove it? Here is my code to INSTALL (for load), LOAD, INSTALL (for install): https://gist.github.com/Novitoll/2d8146b85f4384eb4dd039eb8116d1ed 2. All of them returns 9000, which is OK, I'm using a simple CardReader, but when I insert the SIM to a phone, no applet comes up. Initially, I thought that the AID for instance is the reason. So when I do https://gist.github.com/Novitoll/2d8146b85f4384eb4dd039eb8116d1ed#file-appl… ... module_aid="d07002CA44900101", app_aid="d07002CA44900101" I'm getting 6A88 (Referenced data not found). I changed it to A0000000871002FFffFFff8900000101 A000000087 - RID for 3GPP 1002 - USIM FFff - country code FFff - card issuer code 89 - Telecom 00000101 - App version? Havent figured out this yet the answer is 9000. But no app pops up on the phone once I insert SIM card back. 3. Also I'm checking if any load file actually ends up by taking some non-volatile space in SIM -- no difference. 4. After Install for install, there is nothing to be done, rght? Like updating EF_DIR is not required, where USIM is the only applet. Could you please assist? My twitter is twitter.com/novitoll Thanks, -- Sabr

2 4

2026

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

OpenBSC February 2022