baseband-devel June 2013

baseband-devel@lists.osmocom.org

17 participants
21 discussions

Sdcch to TCH
by Akib Sayyed 30 Jun '13

30 Jun '13

can current master perform BCCH-> SDCCH->TCH? -- Akib Sayyed Matrix-Shell akibsayyed(a)gmail.com akibsayyed(a)matrixshell.com Mob:- +91-966-514-2243

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scapy gsm-um with trx firmware?
by Miguel Rios 17 Jun '13

17 Jun '13

Hi list, Since getting Sylvain's transceiver to work with my C118, I started to look at scapy and specifically the gsm-um code as another interesting tool in the fuzzer's arsenal. I see that Laurent Weber's personal website, http://0xbadcab1e.lu/scapy_gsm_um-howto.txt, where he apparently had posted some examples and tips on playing with his code, is no longer available. Does anyone have a copy of those instructions? Has anyone tried running gsm-um with the TRX firmware? Any tips or pointers before I dive in? Cheers, Miguel

5 6

no transceiver binary inside src/host/layer23/src/transceiver folder after running make
by Miguel Rios 13 Jun '13

13 Jun '13

Hi list, I'm trying to experiment with Sylvain's transceiver as per the wiki here http://bb.osmocom.org/trac/wiki/Software/Transceiver I think that I may be doing something wrong when making in that I can see no transceiver binary inside /osmocom-bb/src/host/layer23/src/transceiver. The host/layer23/src/transceiver folder is created properly. After running make HOST_layer23_CONFARGS=--enable-transceiver, I don't see any transceiver binary in there, so naturally OpenBTS fails when I execute the exec <your path to osmocom-bb>/src/host/layer23/src/transceiver/transceiver 1 script. I also don't see any errors when running make, although it scrolls by so fast it is hard to be sure. Thanks, Miguel

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osmocombb not stable
by John Wu 12 Jun '13

12 Jun '13

Hi list, I test osmocombb with C118. At the beginning everything seems ok. but after some minutes osmocombb can not camp to any cell. osmocon print the all cell rssi are -138dbm. Then I reload the ram firmware it camp the cell again. since osmocombb do not do release. So anyone know which version in the git is stable version. Regards

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decoding raw sdcch
by Akib Sayyed 11 Jun '13

11 Jun '13

I am trying to decode raw bits god from burst_ind to get detail info about channel assignment. but i am unable to do so. here are steps i used. take raw bites (23 bits) create lapdm entity and then provide message and try to decode (fails) i get correct system information but not asssignment message. can some one please list details on decoding sdcch. i am using burst_ind branch. -- Akib Sayyed Matrix-Shell akibsayyed(a)gmail.com akibsayyed(a)matrixshell.com Mob:- +91-966-514-2243

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Re: Any interest for Osmocom meetings in Bavaria ?
by Dieter Spaar 11 Jun '13

11 Jun '13

So far three persons have indicated their interest to join a meeting at my place. Considering the time it takes to drive to my place, it probably makes sense to have the meeting at the weekend (either Saturday or Sunday) so that there is more time for the meeting itself. I can suggest one of the following dates for the first meeting, somewhere between 10:00 to 18:00 on each day: 25.8. (Sa) or 26.8. (Su) 1.9. (Sa) or 2.9. (Su) 8.9. (Sa) or 9.9. (Su) So please let me know when you have time and also make suggestions in which Osmocom topic you are interested in so that we can have some sort of agenda for the meeting to make best use of the time. Best regards, Dieter -- Dieter Spaar, Germany spaar(a)mirider.augusta.de

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umts rrc question
by ☎ 10 Jun '13

10 Jun '13

Hi all. I've problem reading umts standard etsi ts 125.331 - for example 10.2.11 DOWNLINK DIRECT TRANSFER does not specify length of "message type" or "rrc transaction id", it only references 10.3.3.36 which do not specify length as well - only "Integer (0..3)". Where do I look up the actual bit lengths? As far as I recall in gsm spec it was given right away. I've tried to read asn in wireshark/asn1/rrc but got myself only same "Integer (0..3)" and attempt to read generated code makes my brain reboot. I've tried to compile it with erlc and use parsers as is but hit "function not exported" - I don't know enough erlang yet to fix this. -- best regards, Max, http://fairwaves.ru

2 1

Getting burst in binary format for Kraken
by Obscura 10 Jun '13

10 Jun '13

I sniffed some data in UDP (GSMTAP) format using osmocon, ccch_scan and Wireshark . Next step is "feeding" recived data to Kraken. But i need it in binary format. How can i get data in suitable format (114 bit per burst)?

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TOA in burst_ind
by Akib Sayyed 06 Jun '13

06 Jun '13

Hi Sylvain I wanted to know unit for TOA means, is it in miliseconds,nanoseconds etc. help is appreciated -- Akib Sayyed Matrix-Shell akibsayyed(a)gmail.com akibsayyed(a)matrixshell.com Mob:- +91-966-514-2243

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RE: Cannot open serial device /dev/ttyUSB0
by George Andguladze 04 Jun '13

04 Jun '13

No it doesn't. > From: ml(a)mail.tsaitgaist.info > To: baseband-devel(a)lists.osmocom.org > Subject: Re: Cannot open serial device /dev/ttyUSB0 > Date: Tue, 4 Jun 2013 11:29:13 -0700 > > Excerpts from George Andguladze's message of 2013-06-04 10:40:35 -0700: > > Cannot open serial device /dev/ttyUSB0 > > > > I am getting this error message when I try to connect to my C155 phone and upload hello_world.compalram.bin using this command: > > > > ./osmocon -p /dev/ttyUSB0 -m c155 ../../target/firmware/board/compal_e99/hello_world.compalram.bin > > > > Even though device ttyUSB0 exists in my /dev/ directory, and I have set modprobe cp210x, and chmod 777 /dev/ttyUSB0. > > instead of setting 777 permissions on this device, you can simply add yourself to the dialout group (it's the more proper way) > here the debian command (don't forget to log out and in again for this to take effect) > sudo adduser $USER dialout > > > crw-rw---- 1 root dialout 4, 71 2013-06-04 20:40 /dev/ttyS7 > > crw-rw---- 1 root dialout 4, 72 2013-06-04 20:40 /dev/ttyS8 > > crw-rw---- 1 root dialout 4, 73 2013-06-04 20:40 /dev/ttyS9 > > crwxrwxrwx 1 root dialout 188, 0 2013-06-04 21:07 /dev/ttyUSB0 > > > > > > What is it that I am doing wrong? > > does it work with root rights (using sudo)? > > kevin >

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baseband-devel June 2013