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Mirko Kovacevic northmirko at gmail.comThank you for your kind suggestions. I made a simple test with code snippet (lines): 1. var S1AP_PDU ber_pdu_to_log := valueof(ts_S1AP_SetupReq(g_enb_pars[idx].global_enb_id,g_enb_pars[idx].supported_tas, v32)); 2. log(ber_pdu_to_log); 3. var charstring pdu_to_send_to_ip_layer := enc_S1AP_PDU(ber_pdu_to_log); 4. log(pdu_to_send_to_ip_layer); RESULT from line 2. { initiatingMessage := { procedureCode := 17, criticality := reject (0), value_ := { s1SetupRequest := { protocolIEs := { { id := 59, criticality := ignore (1), value_ := { global_ENB_ID := { pLMNidentity := '62F224'O, eNB_ID := { macroENB_ID := '00000001010110110011'B }, iE_Extensions := omit } } }, { id := 60, criticality := ignore (1), value_ := { eNBname := "Ksenija" } }, { id := 64, criticality := reject (0), value_ := { supportedTAs := { { tAC := '3039'O ("09"), broadcastPLMNs := { '62F224'O }, iE_Extensions := omit } } } } } } } } } ################################# RESULT from line 3. ASN.1 (A)PER S1AP '00110020000003003B40080062F22400015B30003C4002030000400007000C0E4062F224'O ################################# I checked encoded ASN.1 message with publicly available decoders. Error is thrown whenever decoder tries to decode ENBname. I can conclude that libfftranscode API is the source of the problem. On Mon, Oct 25, 2021 at 5:50 PM Harald Welte <laforge at osmocom.org> wrote: > > On Fri, Oct 22, 2021 at 02:12:03PM +0200, Mirko Kovacevic wrote: > > Protocol-IEs, MMEname and ENBname, cant be decoded\encoded properly, > > definitely. > > one would have to check if the encoding problem already exists in the BER version > (as generated by TITAN natively) or if it happens at the BER <-> PER transcoding > inside the [unfortunately] non-public libfftranscode, generated by ffasn1c. > > I you can build a small, self contained test case that shows a problem in > BER <-> PER transcoding using the libfftranscode API directly (removing all of TITAN, etc.) > then we may have a chance of either solving it at sysmocom or by asking > the ffasn1c author to have a look > > > Amazing progress with S1AP emulation, congrats. > > thanks. Please keep us posted about any progress. We're happy to merge any > related patches you may have for adding more test cases, fixing bugs, etc. > > I never found the time for it, but the general idea always was to automatically > run this testsuite in jenkins.osmocom.org against the open5gs-mme, like we do > for or own osmocom software. > > Regards, > Harald > -- > - Harald Welte <laforge at osmocom.org> http://laforge.gnumonks.org/ > ============================================================================ > "Privacy in residential applications is a desirable marketing option." > (ETSI EN 300 175-7 Ch. A6) -- Puno pozdrava, Mirko Kovacevic