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cannot run ttcn3-msc-tests locally, any ideas?
by Neels Hofmeyr 04 Feb '23

04 Feb '23

I'm currently stumped here, thanks for any hints what to try next: All of a sudden, all attempst to run the MSC_Tests.ttcn locally, from osmo-ttcn3-hacks/msc, are failing with the same error. This happens regardless of the selection of tests to run, i.e. even if not related to SMPP at all. Our jenkins doesn't seem to encounter that error. It seems that titan is sending an invalid SMPP packet, then something happens that SMPP_Emulation does not expect to happen, and the entire run of tests is aborted. I've already tried to 'make clean' in the osmo-ttcn3-hacks root dir, 'make deps', and re-ran the gen_links and regen_makefile scripts in msc/. I'm still getting the same error: none -> fail reason: "Unexpected SMPP from peer" [...] terminate called after throwing an instance of 'TC_Error' ./MSC_Tests: Abort was called /usr/lib/titan/libttcn3-parallel-dynamic.so(_Z14signal_handleri+0xa3)[0x7f1e319950a3] /lib/x86_64-linux-gnu/libc.so.6(+0x3bf90)[0x7f1e3085af90] [...] /usr/lib/titan/libttcn3-parallel-dynamic.so(+0x24c077)[0x7f1e3164c077] Error: Receiving of data failed from the MTC at 127.0.0.1 [127.0.0.1]: Connection reset by peer MC@x43: The control connection to MTC is lost. Destroying all PTC connections. MC@x43: MTC terminated. ttcn3_start: error: the MTC terminated unexpectedly exit MC@x43: Shutting down session. MC@x43: Shutdown complete. Comparing expected results './expected-results.xml' against results in 'junit-xml-1051482.log' -------------------- pass MSC_Tests.TC_cr_before_reset Summary: pass: 1 skip: 202 So when encountering the SMPP failure, titan exits and stops running the remaining tests. osmo-msc logs: 20230201010116947 DSMPP DEBUG [] smpp_pdu_rx(00 00 00 2e 00 00 00 09 00 00 00 00 00 00 00 01 6d 73 63 5f 74 65 73 74 65 72 00 6f 73 6d 6f 63 6f 6d 31 00 4d 53 43 5f 54 65 73 74 73 00 ) (smpp_smsc.c:718) 20230201010116947 DSMPP ERROR [] Error ([command_length:0000002E(OK)][command_id:00000009(OK)][command_status:00000000(OK)][sequence_number:00000001(OK)][system_id:msc_tester(OK)][password:osmocom1(OK)][system_type:MSC_Tests(OK)][interface_version:00(Value length exceed buffer length)]) in smpp34_unpack() (smpp_smsc.c:513) 20230201010116948 DSMPP ERROR [] length invalid 872415232 (smpp_smsc.c:805) Attached is a pcap showing an SMPP from titan that seems to cause the trouble. Could a debian dist-upgrade have caused this error? TTCN-3 and ASN.1 Compiler for the TTCN-3 Test Executor Version: 8.2.0 Build date: Sep 10 2022 11:52:51 Compiled with: GCC 12.2.0 Using OpenSSL 3.0.7 1 Nov 2022 FYI, I have this in my apt/sources.list.d: deb https://downloads.osmocom.org/packages/osmocom:/nightly/Debian_Unstable/ ./ ~N

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Card reader initialization failed
by bhogendra.rao＠gmail.com 03 Feb '23

03 Feb '23

Hi, I am a new bee into pysim and python too. I successfully installed all dependencies and was able to run my pysim-read. Then connected my sim reader and gave the following command $python3 pySim-read.py -p 0 The response is like qt5ct: using qt5ct plugin Using PC/SC reader interface Card reader initialization failed with exception: The response is a exception with empty string. any hint ? if i run pcsc_scan, the output is like PC/SC device scanner V 1.5.2 (c) 2001-2017, Ludovic Rousseau <ludovic.rousseau(a)free.fr> Using reader plug'n play mechanism Scanning present readers... Waiting for the first reader... and dosenot come out of the waiting.

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Call for Help: Test data from SIM cards for pySim-shell decoder unit tests
by Harald Welte 29 Jan '23

29 Jan '23

Hi all! I'm currently adding unit tests for the various pySim encoder/decoder classes for the variouus SIM/UICC/USIM/ISIM files. [1] In order to increase the test coverage, I would appreciate any help in obtaining test data, particularly for the more "exotic" (or recently introduced) files, related to DF.5GS, ADF.ISIM or even DF.WLAN or the like. So if you have any SIM cards with related files populated, I would appreciate some test data. You can simply send me a copy+paste of the respective 'read_binary' / 'read_records' command, or a partial 'export'. In the latter case, please make sure to redact/remove your IMSI/ICCID/MSISDN/Kc data to prevent leaking privacy related information. Thanks in advance. Regards, Harald [1] https://gerrit.osmocom.org/c/pysim/+/24012 -- - Harald Welte <laforge(a)gnumonks.org> https://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)

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Phones jumping ship from commercial networks to test network
by Mychaela Falconia 24 Jan '23

24 Jan '23

Hello GSM community, I have a question for those who operate their own GSM networks (be it for fun or for research or for any other purpose) in places that DO have regular commercial cell service, i.e., NOT ship-at-sea, middle of desert or Rhizomatica-type environments: how do you deal with, and ideally prevent, the highly undesirable situation of other people's phones, not related to your operation, "jumping ship" from being registered to their regular commercial network to trying to register to your test network instead? I live and operate in an area where ONE commercial operator still provides GSM/2G service (although only to "grandfathered" customers, closed to new subscribers), plus there are super-strong 4G and 5G signals from all 3 USA-wide carriers. I also operate my own "pirate" GSM network on a test/experimental basis, meaning not always on, but only turned on for brief intervals when I am playing with it. When I do turn on my test GSM network, I squat on an ARFCN in the middle of a 5 MHz wide "dead" spot (SA shows noise floor over the whole 5 MHz block in question), and most of the time I set my power output to the lowest possible setting: I set max_power_red to the maximum of 20, which should result in 3 dBm output from the sysmoBTS box. I also recently changed my MCC-MNC from 310-222 (an unallocated MNC within MCC 310) to 001-325 (MCC meaning test network, MNC is a feeble attempt to indicate that it's me - I got 00440325 as my test IMEI range in my "other" capacity as ME manuf), but the problematic behaviour of at least some phones erratically "jumping ship" from T-Mobile GSM to the test network still occurs. Here is a concrete example of inexplicable erratic behaviour I am seeing: * Last night I powered up my test network at around 19:41 local time. My wife was with me the whole evening; her primary personal phone is Nokia C3-00 (circa 2011, late in GSM terms, but still 2G-only in terms of RAN support) with service on T-Mobile. * About 3.5 hours later, at around 23:14 local time, my wife noticed that her phone "went into the black hole" (our term for times when phones show "no service" even though T-Mobile GSM signal is there just fine), and she alerted me. I looked at OsmoCNI logs in syslog, and I saw that just a little earlier, at around 22:38 local time, there was an attempt from my wife's phone (her T-Mobile IMSI) to register to our test network. Of course that registration attempt failed - I don't have a roaming agreement with T-Mobile, there is no MAP roaming support in OsmoCNI, I don't have any T-Mobile or other operators' IMSIs in my OsmoHLR, and I am NOT running with "create sub on demand" feature. * At around 23:14 local time, when my wife noticed that her phone went into the black hole, she immediately proceeded to reboot it - such reflexive reboots are now an "autopilot" action for her - and on its next boot cycle, it immediately proceeded to make another attempt to register to our test network instead of T-Mobile, as evidenced by OsmoCNI logs! * At that point I turned off the test network GSM signal, as there did not appear to be any other way to convince my wife's Nokia phone to go back to its rightful network of T-Mobile. Now let me add some noteworthy details: * The ARFCN on which I squat for my test network is NOT listed in the neighbor cell list advertised by the sole and single commercial GSM/2G operator we have around here. * When I mentioned this issue previously in an OsmoDevCall USSE, I was asked if perhaps the ARFCN I squat on might be listed as a 2G neighbor in the neighbor list of some newer-G cell. I don't have any direct way to disprove this idea, but my wife's phone, the one that exhibits this inexplicable behaviour, is a 2G-only model, NOT supporting LTE or even UMTS. And the last 3G/UMTS service in our area was shut down last summer, leaving only LTE+5G for the masses and GSM for the tiny sliver of "grandfathered" users who won't give it up until we die. * In last night's episode, my wife's phone sat quite happily within our dwelling, mere meters from the sysmoBTS antenna putting out its 3 dBm, for almost 3 hours before it made its first attempt to jump ship. During the entirely of this almost-3-hours interval, the signal from our test network as received by the phone was overwhelmingly stronger than the commercial signal (being meters away from the BTS), yet the phone behaved like it should (listened to its serving cell and advertised neighbor cells, no searching around) for almost 3 h. * The location update interval set by T-Mobile's network is 1 hour - thus periodic LU could not have been the trigger that told Nokia's bugger to abandon its serving cell and go into open-ended search of all possible ARFCNs. So what in the world could have been the trigger then, that caused the bugger to misbehave after almost 3 hours of behaving properly and correctly? * Aside from whatever the trigger might be, once that Nokia bugger attempts to register to the test GSM network and fails, why in the bloody hell is it not going back to the weaker (in terms of RSSI) but working T-Mobile network, why does it "park" itself in no-service state instead? I have heard of other people operating test GSM cells/networks in areas where commercial services do exist: I have heard that Neels, of Sysmocom team, operates a test cell under a test license, and when Keith gave an OsmoDevCall presentation on Rhizomatica back in 2021, that presentation was done from an office in some "big" city in Oaxaca, a place where test signals had to coexist peacefully with commercial operators' signals. So how do you guys do it? What additional magic are you doing, which I must be missing, to prevent the situation of phones jumping ship from commercial networks to the test network when the signal from the test network is much stronger due to proximity? Perplexed, Mother Mychaela

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GCR (osmo_store16be/osmo_store32be)
by Keith 19 Jan '23

19 Jan '23

Hi All, I was working a few months back on some LCLS implementation with bts-loop and I got it working, including that the pbx can use SIP Re-INVITES to get in and out of the audio loop during calls. However, I only ever tested it with one call, that is with two phones. When I tested it on alive site, immediately there where problems so I reverted and left it. Looking at it again now, there's a very obvious problem which is that osmo-msc generates the same GCR for (almost) every call. I had noticed this before but for some reason I thought I had seen it generating different GCR for a second simultaneous call, but no. Anyway, the above is extraneous info to the question: Could somebody take a look at this: https://gitea.osmocom.org/cellular-infrastructure/osmo-msc/src/branch/maste… where we have: osmo_store32be(trans->callref, lcls->gcr.cr); osmo_store16be(use_lac ? trans->msc_a->via_cell.lai.lac : trans->msc_a->via_cell.cell_identity, lcls->gcr.cr + 3); Now, If I change the order, such that would seem logical: osmo_store16be(use_lac ? trans->msc_a->via_cell.lai.lac : trans->msc_a->via_cell.cell_identity, lcls->gcr.cr + 3); osmo_store32be(trans->callref, lcls->gcr.cr); Then I get a different GCR, reflecting the trans->callref for each call. But am I then maybe overwriting the LAC/CI ? Would seem to make sense, but I'm just not sure if that is all there is to it, as I don't really grok osmo_store_xxxx for(i = 0; i < n; q[i] = (x >> ((n - 1 - i) * 8)) & 0xFF, i++); Is it just a simple order error, and is everything OK with lcls->gcr.cr + 3 as the pointer *p passed to osmo_store32be_ext() ? given that: struct osmo_lcls *lcls; where: struct osmo_lcls { struct osmo_gcr_parsed gcr; }; struct osmo_gcr_parsed { uint8_t cr[5]; }; I guess I'm still not really 100% on the char/uint8_t thing and advancing pointers. Thanks! k.

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OsmoDevCall on Jan 18, 2023: ice40-usbtrace OSHW USB protocol tracer
by Harald Welte 17 Jan '23

17 Jan '23

Dear Osmocom community, we're happy to announce the next incarnation of OsmoDevCall. when: January 18, 2023 at 20:00 CET where: https://osmocom.org/OsmoDevCall This time, @tnt will be presenting on ice40-usbtrace OSHW USB protocol tracer In case you never heard about ice40-usbtrace before: It's a low-cost full-speed USB protocol tracer built around the iCE40 FPGA. This meeting will have the following schedule: 20:00 meet + greet 20:10 presentation as outlined above 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 soon! 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)

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Distributed GSM
by Keith 17 Jan '23

17 Jan '23

Hi all, I was thinking about how to deal with the so called "evil twins" in the distributed hlr, and also how to have a subscriber-create-on-demand situation at the same time as a having an mslookup client. The problem being that if we have mslookup client + fallback to create-on-demand if no HLR responds for an IMSI, we will eventually create a duplicate because the HLR that owns the IMSI is not contactable at the time of an IMSI ATTACH attempt. Anyway, just in terms of investigating the situation on my HLRs, I added features [1] - so far, an ability to do a gsup.hlr lookup and not exit on the first age:0 - so that I can see all HLRs that respond as having the imsi in local HLR, and also to ask via mDNS for HLRs that have an IMSI, but only if it's active on that HLR, that is, it has nam_cs/nam_ps So this is really asking about what people feel about expanding the D-GSM features in osmo-hlr, as I think it may be the case that rhizomatica/TIC are the only people that use it? [1] https://gitlab.tic-ac.org/rhizomatica/osmo-hlr

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Soapymultisdr
by Lanea Lucy 26 Dec '22

26 Dec '22

Hi, is it possible to use soapyMultiSdr for osmo-trx? I have a hackrf one, which isn't full duplex, so my idea is to use the hackrf for tx, and something else for Rx. With soapymultisdr it is possible to use multiple devices as a single soapysdr device.

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SGSNemu performance
by Sipos Csaba 25 Dec '22

25 Dec '22

Dear Harald, Sorry to spam the openbsc list with this, but if you (or someone) can confirm if the Sgsn-emu part of Osmo-GGSN utilizing the kernel GTP module or not, that would be lovely. FYI, I was not able to pass more than 280Mbit and the sgsn-emu process was maxing out a single core. Based on this I suspect that it does not use the kernel GTP module. I have seen some commits that indicates preparation work for this feature, but it is unclear at least to me, if this was finished or not. In the Osmo-GGSN.cfg example config I can see the config option for kernel GTP, but not in the sgsn-emu.cfg example. Regards, Csaba

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Re: OpenBSC Digest, Vol 98, Issue 9
by Sipos Csaba 25 Dec '22

25 Dec '22

Hi Pau and Harald, > So sgsnemu is passing use_kernel=false, which makes the lib skip gtp-kernel functions That is nice, I can play with that part quite nicely and take a look how the GGSN handles the switch between kernel and non-kernel GTP. Thanks for that! @Harald: In gtpnl.h there is int gtp_dev_create() and int gtp_dev_create_sgsn() So it seems there is a different dev create for the SGSN mode. And in the later one the role is set to "GTP_ROLE_SGSN" int gtp_dev_create(int dest_ns, const char *gtp_ifname, int fd0, int fd1) { return _gtp_dev_create(dest_ns, gtp_ifname, fd0, fd1, GTP_ROLE_GGSN); } EXPORT_SYMBOL(gtp_dev_create); int gtp_dev_create_sgsn(int dest_ns, const char *gtp_ifname, int fd0, int fd1) { return _gtp_dev_create(dest_ns, gtp_ifname, fd0, fd1, GTP_ROLE_SGSN); } EXPORT_SYMBOL(gtp_dev_create_sgsn); I just need to find the relevant part is sgsn-emu to see where these parts are invoked so I can make the modifications. Regards, Csaba <openbsc-request(a)lists.osmocom.org> ezt írta (időpont: 2022. dec. 24., Szo, 13:00): > > Send OpenBSC mailing list submissions to > openbsc(a)lists.osmocom.org > > To subscribe or unsubscribe via email, send a message with subject or > body 'help' to > openbsc-request(a)lists.osmocom.org > > You can reach the person managing the list at > openbsc-owner(a)lists.osmocom.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of OpenBSC digest..." > > Today's Topics: > > 1. Re: SGSNemu performance (Pau Espin Pedrol) > 2. Re: SGSNemu performance (Harald Welte) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Fri, 23 Dec 2022 18:38:55 +0100 > From: Pau Espin Pedrol <pespin(a)sysmocom.de> > Subject: Re: SGSNemu performance > To: Sipos Csaba <dchardware(a)gmail.com>, > "openbsc-request(a)lists.osmocom.org" <openbsc(a)lists.osmocom.org>, > laforge(a)osmocom.org > Message-ID: <782d5c68-0393-e63a-ddbd-a78ca04256e0(a)sysmocom.de> > Content-Type: text/plain; charset=UTF-8; format=flowed > > Hi Csaba, > > > > On 12/22/22 15:00, Sipos Csaba wrote: > > Dear Harald, > > > > Sorry to spam the openbsc list with this, but if you (or someone) can > > confirm if the Sgsn-emu part of Osmo-GGSN utilizing the kernel GTP > > module or not, that would be lovely. > > sgsnemu is not using the kernel module, only osmo-ggsn has support for > it so far. > > See osmo-ggsn.git/./sgsnemu/sgsnemu.c line 1905 calling: > """ > if (tun_new((struct tun_t **)&tun, options.tun_dev_name, false, -1, -1)) > """ > > See tun_new() function used by both osmo-ggsn and sgsnemu: > """ > int tun_new(struct tun_t **tun, const char *dev_name, bool use_kernel, > int fd0, int fd1u) { > """ > > So sgsnemu is passing use_kernel=false, which makes the lib skip > gtp-kernel functions like gtp_kernel_create(). > > > > > FYI, I was not able to pass more than 280Mbit and the sgsn-emu process > > was maxing out a single core. Based on this I suspect that it does not > > use the kernel GTP module. I have seen some commits that indicates > > preparation work for this feature, but it is unclear at least to me, > > if this was finished or not. In the Osmo-GGSN.cfg example config I can > > see the config option for kernel GTP, but not in the sgsn-emu.cfg > > example. > > > > You could try passing use_kernel=true to tun_new(), and see how far you > can get. Patches welcome. > > Regards, > Pau > > > -- > - Pau Espin Pedrol <pespin(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 > * Geschaeftsfuehrer / Managing Director: Harald Welte > > ------------------------------ > > Message: 2 > Date: Fri, 23 Dec 2022 18:47:57 +0100 > From: Harald Welte <laforge(a)gnumonks.org> > Subject: Re: SGSNemu performance > To: Pau Espin Pedrol <pespin(a)sysmocom.de> > Cc: Sipos Csaba <dchardware(a)gmail.com>, > "openbsc-request(a)lists.osmocom.org" <openbsc(a)lists.osmocom.org> > Message-ID: <Y6XpzZoYYdVxYKdb@nataraja> > Content-Type: text/plain; charset=us-ascii > > Hi Csaba and Pau, > > On Fri, Dec 23, 2022 at 06:38:55PM +0100, Pau Espin Pedrol wrote: > > You could try passing use_kernel=true to tun_new(), and see how far you can > > get. Patches welcome. > > The GTP kernel module needs to be told if it operates in SGSN or GGSN mode. > > grep for GTP_ROLE_SGSN in libgtpnl. I don't know all of the related functions > off my head, but on the SGSN side you need to make sure to initialize the kernel > GTP with GTP_ROLE_SGSN instead of GTP_ROLE_GGSN. > > -- > - Harald Welte <laforge(a)gnumonks.org> https://laforge.gnumonks.org/ > ============================================================================ > "Privacy in residential applications is a desirable marketing option." > (ETSI EN 300 175-7 Ch. A6) > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > OpenBSC mailing list -- openbsc(a)lists.osmocom.org > To unsubscribe send an email to openbsc-leave(a)lists.osmocom.org > > > ------------------------------ > > End of OpenBSC Digest, Vol 98, Issue 9 > **************************************

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