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Alexander Chemeris alexander.chemeris at gmail.comIvan, Could you please check whether this issue exists in the Wireshark dissector as well? If yes, then we should submit a patch upstream. Please excuse typos. Written with a touchscreen keyboard. -- Regards, Alexander Chemeris CEO/Founder Fairwaves LLC http://fairwaves.ru On Mar 1, 2013 1:16 AM, "Ivan Kluchnikov" <Ivan.Kluchnikov at fairwaves.ru> wrote: > hi, andreas and steve! > > I fixed this problem, now decoding should work, you can check the last > commit of master branch. > There were problems with decoding and encoding of CSN_RECURSIVE_TARRAY, > CSN_RECURSIVE_TARRAY_1, CSN_RECURSIVE_TARRAY_2. > > > 2013/2/19 jolly <andreas at eversberg.eu>: > > hi, > > > > steve and me experienced a problem with dissecting a "packet resource > > request" at pcu. the patch i attached will show the following output: > > > > $ make && src/osmo-pcu > > > > PayloadType = 1 | spare = 0 | R = 0 | MESSAGE_TYPE = 5 | > Exist_ACCESS_TYPE = > > 1 | ACCESS_TYPE = 3 | : ID | Choice PacketResourceRequestID = 1 | > u.TLLI = > > 0x7ee0e8fd | : End ID | Exist_MS_Radio_Access_capability = 1 | : > > MS_Radio_Access_capability | MS_RA_capability_value { | Choice > > MS_RA_capability_value_Choice = 1 | u.Content length = 34 | > > RF_Power_Capability = 4 | Exist_A5_bits = 1 | A5_bits = 96 | ES_IND = 1 > | PS > > = 0 | VGCS = 0 | VBS = 0 | Exist_Multislot_capability = 1 | : > > Multislot_capability | Exist_HSCSD_multislot_class = 0 | > > Exist_GPRS_multislot_class = 1 | GPRS_multislot_class = 10 .... > > > > this is all correct, but then i patched the get_ms_class_by_capability() > > function at grps_rlcmac_data.c: > > > > ... > > printf("we have = %d\n", cap->Count_MS_RA_capability_value); > > for (i = 0; i < cap->Count_MS_RA_capability_value; i++) { > > printf("index=%d\n", cap->MS_RA_capability_value[i].IndexOfAccTech); > > printf("exists multislot capability %d\n", > > cap->MS_RA_capability_value[i].u.Content.Exist_Multislot_capability); > > printf("exists class %d\n", > > > cap->MS_RA_capability_value[i].u.Content.Multislot_capability.Exist_GPRS_multislot_class); > > printf("class %d\n", > > > cap->MS_RA_capability_value[i].u.Content.Multislot_capability.GPRS_multislot_class); > > ... > > > > the output continues as this: > > > > we have = 2 > > index=2 > > exists multislot capability 0 > > exists class 1 > > class 10 > > index=0 > > exists multislot capability 0 > > exists class 0 > > class 0 > > > > the "class 10" is correct, also it is correct that the class only exists > in > > the first entry of the capability array. the output of the dissector > states > > that multislot capability exists (Exist_Multislot_capability = 1), but > if i > > look at the structure, this field is not set. > > > > i looked at the dissector code, but don't really understand why > > CSN_NEXT_EXIST works for some elements and not for others. > > > > any ideas? > > > > regards, > > > > andreas > > > > > > -- > Regards, > Ivan Kluchnikov. > http://fairwaves.ru > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/osmocom-net-gprs/attachments/20130301/8db20ca9/attachment.htm>