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neels gerrit-no-reply at lists.osmocom.orgneels has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/25070 ) Change subject: msc: add MSC_Tests.TC_call_re_establishment ...................................................................... msc: add MSC_Tests.TC_call_re_establishment The osmo-msc patch that makes this test pass is I6fa37d6ca9fcb1637742b40e37b68d67664c9b60 Related: SYS#5130 Change-Id: Ifdff5573eeb3b3d41e8599b9b0228411d2576864 --- M msc/MSC_Tests.ttcn 1 file changed, 107 insertions(+), 0 deletions(-) git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks refs/changes/70/25070/1 diff --git a/msc/MSC_Tests.ttcn b/msc/MSC_Tests.ttcn index ecfe5f9..428dae3 100644 --- a/msc/MSC_Tests.ttcn +++ b/msc/MSC_Tests.ttcn @@ -6626,6 +6626,111 @@ vc_conn.done; } +const charstring REEST_LOST_CONNECTION := "REEST_LOST_CONNECTION"; +const charstring REEST_CLEARED := "REEST_CLEARED"; + +friend function f_tc_call_re_establishment_1(charstring id, BSC_ConnHdlrPars pars) + runs on BSC_ConnHdlr { + f_init_handler(pars, t_guard := 30.0); + + f_perform_lu(); + + var CallParameters cpars := valueof(t_CallParams('12345'H, 0)); + f_mo_call_establish(cpars); + f_sleep(3.0); + COORD.send(REEST_LOST_CONNECTION); + COORD.send(cpars); + f_expect_clear(verify_vlr_cell_id := false); + COORD.send(REEST_CLEARED); +} + +friend function f_tc_call_re_establishment_2(charstring id, BSC_ConnHdlrPars pars) + runs on BSC_ConnHdlr { + f_init_handler(pars, t_guard := 30.0); + var CallParameters cpars; + + COORD.receive(REEST_LOST_CONNECTION); + COORD.receive(tr_CallParams) -> value cpars; + + /* The MS has lost the first channel and decides to show up on a new conn (on a nearby neighbor cell) to ask for + * CM Re-Establishment. Send a Complete Layer 3 to osmo-msc with a CM Re-Establishment Request. */ + var MobileIdentityLV mi := valueof(ts_MI_IMSI_LV(g_pars.imsi)); + var PDU_ML3_MS_NW l3_info := valueof(ts_CM_REESTABL_REQ(mi)); + f_cl3_or_initial_ue(l3_info); + + /* At this point the other test component should receive the Clear Command for the first A connection. */ + + /* This new connection continues with Authentication... */ + f_mm_common(); + + /* ...and with Assignment of a voice channel. */ + var template BSSMAP_IE_AoIP_TransportLayerAddress tla_ass := + f_tr_BSSMAP_IE_AoIP_TLA(cpars.mgw_conn_1.mgw_rtp_ip, ?); + BSSAP.receive(tr_BSSMAP_AssignmentReq(omit, tla_ass)); + /* By this Assignment Request, the CM Re-Establishment Request is implicitly accepted. */ + + /* Send Assignment Complete from BSC */ + var template BSSMAP_IE_AoIP_TransportLayerAddress tla; + tla := f_ts_BSSMAP_IE_AoIP_TLA(cpars.bss_rtp_ip, cpars.bss_rtp_port); + var BSSMAP_IE_SpeechCodec codec; + codec := valueof(ts_BSSMAP_IE_SpeechCodec({ts_CodecFR})); + + /* Make really sure the other component is done with its MGCP */ + COORD.receive(REEST_CLEARED); + + /* Transfer state for this call over to this test component so we can resolve MNCC and MGCP in this function. */ + f_create_mncc_steal_call(cpars.mncc_callref); + f_create_mgcp_steal_ep(cpars.mgcp_ep); + + /* osmo-msc may redirect the MGW endpoint to the newly allocated channel. + * Apparently osmo-msc currently also sends an MDCX to the CN side, just repeating the same configuration that + * is already in use. This test accepts any number of or even lack of MDCX. */ + var default ack_mdcx := activate(as_mgcp_ack_all_mdcx(cpars)); + + BSSAP.send(ts_BSSMAP_AssignmentComplete(omit, tla, codec)); + /* The call has been fully re-established. + * Let a bit of time pass before hanging up, for everything to settle. */ + f_sleep(3.0); + + deactivate(ack_mdcx); + + /* Hang up the call and clear the new, second A connection */ + var default ack_dlcx := activate(as_mgcp_ack_all_dlcx(cpars)); + + /* CC release. This is the proper MS initiated release sequence as shown by + * https://git.osmocom.org/osmo-msc/tree/doc/sequence_charts/voice_call_full.msc?id=e53ecde83e4fb2470209e818e9ad76a2d6a19190 + * f_call_hangup() seems a bit mixed up, so here a "proper" sequence. Fix of f_call_hangup() pending. */ + BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_DISC(cpars.transaction_id, '0'B, '0000000'B))); + MNCC.receive(tr_MNCC_DISC_ind(cpars.mncc_callref)); + MNCC.send(ts_MNCC_REL_req(cpars.mncc_callref, valueof(ts_MNCC_cause(23)))); + BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_RELEASE(cpars.transaction_id))); + BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_REL_COMPL(cpars.transaction_id, '0'B))); + MNCC.receive(tr_MNCC_REL_cnf(cpars.mncc_callref, cause := *)); + + /* BSSAP clear */ + interleave { + [] BSSAP.receive(tr_BSSMAP_ClearCommand) { + BSSAP.send(ts_BSSMAP_ClearComplete); + } + [] BSSAP.receive(RAN_Conn_Prim:MSC_CONN_PRIM_DISC_IND); + } + + f_sleep(1.0); + deactivate(ack_dlcx); +} + +testcase TC_call_re_establishment() runs on MTC_CT { + var BSC_ConnHdlr vc_conn1; + var BSC_ConnHdlr vc_conn2; + f_init(); + vc_conn1 := f_start_handler(refers(f_tc_call_re_establishment_1), 91, verify_cell_id := false); + vc_conn2 := f_start_handler(refers(f_tc_call_re_establishment_2), 91, verify_cell_id := false); + connect(vc_conn1:COORD, vc_conn2:COORD); + vc_conn1.done; + vc_conn2.done; +} + + control { execute( TC_cr_before_reset() ); execute( TC_lu_imsi_noauth_tmsi() ); @@ -6784,6 +6889,8 @@ execute( TC_lu_and_expire_while_paging() ); execute( TC_paging_response_imsi_unknown() ); execute( TC_paging_response_tmsi_unknown() ); + + execute( TC_call_re_establishment() ); } -- To view, visit https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/25070 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmo-ttcn3-hacks Gerrit-Branch: master Gerrit-Change-Id: Ifdff5573eeb3b3d41e8599b9b0228411d2576864 Gerrit-Change-Number: 25070 Gerrit-PatchSet: 1 Gerrit-Owner: neels <nhofmeyr at sysmocom.de> Gerrit-MessageType: newchange -------------- next part -------------- An HTML attachment was scrubbed... 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