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Ivan Kluchnikov Ivan.Kluchnikov at fairwaves.ruYes, this issue exists in the Wireshark too, but it is not critical there, because dissector displays decoding of this message correct. In any case, I will prepare a patch. 2013/3/1 Alexander Chemeris <alexander.chemeris at gmail.com>: > Ivan, > > 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 >> > -- Regards, Ivan Kluchnikov. http://fairwaves.ru