OpenBSC July 2016

openbsc@lists.osmocom.org

19 participants
42 discussions

Re: OsmoNITB + Asterisk
by Anonim Stefan 31 Jul '16

31 Jul '16

Hi, Is there any intention / interest among current community developers to implement the DTMF for osmo sip connector?! Thanks, Stefan On Jul 27, 2016 3:33 PM, "Holger Freyther" <holger(a)freyther.de> wrote: > On 27 Jul 2016, at 20:19, Brian Butterly <bbutterly(a)ernw.de> wrote: > > Hi, Hi! > has anyone recently put together a functional setup with OsmoNITB and > Asterisk (+LCR)? why asterisk? why LCR? The osmo-sip-connector is a "trivial" piece of software that bridges MNCC to SIP (and back) and let's everyone else do the heavy lifting. In contrast to LCR it currently lacks: * Multi-party calls (a bit harder) * DTMF (quite easy but not done) holger

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OsmoNITB + Asterisk
by Brian Butterly 30 Jul '16

30 Jul '16

Hi, has anyone recently put together a functional setup with OsmoNITB and Asterisk (+LCR)? I've got multiple errors while compiling LCR with Asterisk, mainly unknown definitions and a set of missing functions. My setup: -NanoBTS -current OpenBSC (running perfectly) -Ubuntu Xenial, 64Bit, VBox VM -current LCR from Osmocom Repos -Asterisk (build without any issues) --1.8.32.3 from Asterisk Page --1.6.2.24 from Asterisk Page --11.32.0 form Asterisk Page --last 13.x release vie apt I had expected the newer versions to be incompatible, still gave them a shot anyways. I've started fiddling with LCR, but before I go deeper into that, I just wanted to check if there was some defined approach which would get everything up and running. I'd be very thankful for any hint or maybe some information on which versions of what will actually work together. Thanks! Brian

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dyn TS tweaks and fixes
by Neels Hofmeyr 29 Jul '16

29 Jul '16

Hi all, I have some patches that probably fix some corner cases of dynamic pchan switching. However, since I'm technically already in vacation, I will only be able to properly test them in about 10 days' time. If they should become interesting before that, the changes are pushed to branches called neels/dyn_fixes in openbsc and osmo-bts. ~Neels -- - Neels Hofmeyr <nhofmeyr(a)sysmocom.de> http://www.sysmocom.de/ ======================================================================= * sysmocom - systems for mobile communications GmbH * Alt-Moabit 93 * 10559 Berlin, Germany * Sitz / Registered office: Berlin, HRB 134158 B * Geschäftsführer / Managing Directors: Harald Welte

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osmo-bts: rach_ind.ra size
by Neels Hofmeyr 27 Jul '16

27 Jul '16

I just came across this compiler warning: l1sap.c: In function 'gsmtap_ph_rach': l1sap.c:291:8: warning: assignment from incompatible pointer type [enabled by default] *data = &l1sap->u.rach_ind.ra; ^ It's a uint16_t ra and used like this in common/l1sap.c: static int gsmtap_ph_rach(struct osmo_phsap_prim *l1sap, uint8_t *chan_type, uint8_t *tn, uint8_t *ss, uint32_t *fn, uint8_t **data, int *len) { [...] *data = &l1sap->u.rach_ind.ra; *len = 1; A cast like this would fix the compiler warning and make sense if data is interpreted to point at a 16 bit data block, probably in host byte order though: *data = (uint8_t*)&l1sap->u.rach_ind.ra; *len = 1; But *len = 1 means that **data is an 8bit value? This is sent to gsmtap. Is *len = 1 something we should fix? ~Neels -- - Neels Hofmeyr <nhofmeyr(a)sysmocom.de> http://www.sysmocom.de/ ======================================================================= * sysmocom - systems for mobile communications GmbH * Alt-Moabit 93 * 10559 Berlin, Germany * Sitz / Registered office: Berlin, HRB 134158 B * Geschäftsführer / Managing Directors: Harald Welte

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New subscriber not created automatically with accept-all/subscriber-create-on-demand configuration
by Shaddi Hasan 27 Jul '16

27 Jul '16

Hi folks, I'm seeing some unexpected behavior from OsmoNITB. I am running from the Debian 8 nightly builds from July 25 for everything. My OpenBSC configuration is set as follows: network [...] auth policy accept-all [...] nitb subscriber-create-on-demand assign-tmsi [...] When a new phone tries to camp to the network, it's rejected as follows: https://gist.github.com/shaddi/7674680c329f14c0042fbeca5227962e ("Failed to find subscriber"). My full openbsc.cfg is in that gist as well. If I create the subscriber by IMSI via the VTY though, it camps fine and everything else works as expected. When I tested this this configuration a few weeks ago with an earlier build (sorry, can't recall which one), adding the subscriber manually wasn't necessary, and with the configuration above seems like it also shouldn't be necessary. Couple questions: - Is this the expected behavior for this configuration? - If so, is there currently a way to achieve the prior behavior (subscriber created automatically when a new phone tries to camp, rather than being rejected)? Thanks, Shaddi

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HEADS UP: openbsc.git: force push on master
by Neels Hofmeyr 25 Jul '16

25 Jul '16

Today, gerrit has merged four of my changesets twice for some reason (even though they had the very same Change-Id), meaning that openbsc.git master got four empty commits. It could end up being a stupid thing to do, but I thought if at all then right now and no later: I forced master HEAD back so that we don't have empty commits in it, back to d1c0e3755f2832270a16bdb2d350463409cad887. I apologize in advance for any inconvenience caused. If you need help to recover from a diverged master branch, don't hesitate to ask! ~Neels -- - Neels Hofmeyr <nhofmeyr(a)sysmocom.de> http://www.sysmocom.de/ ======================================================================= * sysmocom - systems for mobile communications GmbH * Alt-Moabit 93 * 10559 Berlin, Germany * Sitz / Registered office: Berlin, HRB 134158 B * Geschäftsführer / Managing Directors: Harald Welte

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NITB hangs if many subscribes and/or subsr. exists with empty extension in hlr
by Keith 25 Jul '16

25 Jul '16

Hi All, On one of our sites osmo-nitb was hanging a few seconds after startup. It took me a while to track it down, and I'm sorry I do not have log output as it has gone to scroll buffer heaven, and I do not want to break the system again right now to get another output, but I can say more or less what happens. If I see it again, I'll be sure to capture full debug log. I also have a backup of the state of the offending hlr, so I can bring it up locally and see if I can replicate and send the log. In fact, there was nothing out of the ordinary in the log anyway before nitb simply stops responding. (CTRL-C still shuts down cleanly if would seem) This 'bad' hlr has some 30,815 subscriber entries, one of them has empty string for extension. (We normally never get to anything near 30,000 as we purge inactive subscribers regularly, but the blank extension had broken our purge job) On this blank extension issue, i'm not sure it coincides with the hang, but I noted this error followed by DBI traceback from here: http://git.osmocom.org/openbsc/tree/openbsc/src/libmsc/db.c#n54 Error was non unique value for column extension, which makes sense of course, as we don't give it a value. Also seems we don't recover from this, as |db_subscriber_alloc_exten() will never be called? | I deleted some 28,000 subscriber entries that were not commissioned users, and the nitb then functions, so I'm at a loss to know where it might have been actually stuck, or if it might be related to the blank extension, or to the large amount of subscriber entries, or something else. Maybe it's obvious to somebody. I have of course deleted the blank extension entry now from the hlr. Thanks! Keith.

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openbsc build broken due to new GSM_PCHAN value
by Neels Hofmeyr 25 Jul '16

25 Jul '16

Just to let you know, the addition of GSM_PCHAN_TCH_F_TCH_H_PDCH in libosmocore implicitly broke the ctrl interface tests in openbsc. FAIL: testBtsChannelLoad (__main__.TestCtrlBSC) ---------------------------------------------------------------------- Traceback (most recent call last): File "./ctrl_test_runner.py", line 237, in testBtsChannelLoad self.assertEquals(r['value'], 'CCCH+SDCCH4,0,0 TCH/F,0,0 TCH/H,0,0 SDCCH8,0,0 TCH/F_PDCH,0,0 CCCH+SDCCH4+CBCH,0,0 SDCCH8+CBCH,0,0') AssertionError: 'CCCH+SDCCH4,0,0 TCH/F,0,0 TCH/H,0,0 SDCCH8,0,0 TCH/F_PDCH,0,0 CCCH+SDCCH4+CBCH,0,0 SDCCH8+CBCH,0,0 unknown 0xb,0,0' != 'CCCH+SDCCH4,0,0 TCH/F,0,0 TCH/H,0,0 SDCCH8,0,0 TCH/F_PDCH,0,0 CCCH+SDCCH4+CBCH,0,0 SDCCH8+CBCH,0,0' because this is unexpected output: "unknown 0xb,0,0" So *any* commit submitted to openbsc will currenty fail. I'll probably fix it shortly with a commit to openbsc... This also directed my attention towards the pchan_load mechanics. It always shows a TCH/F_PDCH entry, but in PDCH mode those would not have any load. I guess it makes sense in the current scheme of things, though it could make even more sense to record channel load not as separate TCH/F_PDCH but in the TCH/F slot, depending on current pchan mode? Similarly for upcoming TCH/F_TCH/H_PDCH: record in the TCH/F or TCH/H slot according to current pchan mode... (For now I'm focusing on completion of TCH/F_TCH/H_PDCH usability, if at all pchan_load tweaks would come later) ~Neels -- - Neels Hofmeyr <nhofmeyr(a)sysmocom.de> http://www.sysmocom.de/ ======================================================================= * sysmocom - systems for mobile communications GmbH * Alt-Moabit 93 * 10559 Berlin, Germany * Sitz / Registered office: Berlin, HRB 134158 B * Geschäftsführer / Managing Directors: Harald Welte

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gerrit: permission to submit
by Neels Hofmeyr 25 Jul '16

25 Jul '16

I've added permission to submit a reviewed patch to the known users group, re: On Sun, Jul 24, 2016 at 04:08:35PM +0000, lynxis lazus wrote: > @Holger: I'm not allowed to do so on gerrit. On Mon, Jul 25, 2016 at 08:08:00AM +0000, Tom Tsou wrote: > Holger, Gerrit does not allow me to submit. ~Neels -- - Neels Hofmeyr <nhofmeyr(a)sysmocom.de> http://www.sysmocom.de/ ======================================================================= * sysmocom - systems for mobile communications GmbH * Alt-Moabit 93 * 10559 Berlin, Germany * Sitz / Registered office: Berlin, HRB 134158 B * Geschäftsführer / Managing Directors: Harald Welte

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Looking for trace with GPRS XID / SNDCP-CID messages
by Philipp Maier 25 Jul '16

25 Jul '16

Hi Folks, I am busy with implementing XID / SNDCP-XID parameter negotiation to use data and header compression with GPRS. It would be very helpful to have an example at hand that shows me how an SNDCP-XID is performed in real life. If someone of you has a GB-Interface trace at hand it would be very helpful for me. regards. Philipp

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OpenBSC July 2016