pespin has submitted this change. ( https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/36589?usp=email )
Change subject: sgsn: add testcases for SGSN Context Request procedure ...................................................................... sgsn: add testcases for SGSN Context Request procedure Change-Id: If71de10897a8a9f6612cd46c760cd89c0299ac2c Related: SYS#6603, OS#6294 --- M library/GTPv1C_Templates.ttcn M sgsn/SGSN_Tests.ttcn 2 files changed, 176 insertions(+), 1 deletion(-) Approvals: osmith: Looks good to me, but someone else must approve Jenkins Builder: Verified pespin: Looks good to me, approved diff --git a/library/GTPv1C_Templates.ttcn b/library/GTPv1C_Templates.ttcn index e9cf797..0907c5e 100644 --- a/library/GTPv1C_Templates.ttcn +++ b/library/GTPv1C_Templates.ttcn @@ -67,7 +67,8 @@ GTP_CAUSE_MS_REFUSES (4), GTP_CAUSE_MS_IS_NOT_GPRS_RESPONDING (5), /* reserved */ - GTP_CAUSE_REQUEST_ACCEPTED (128) + GTP_CAUSE_REQUEST_ACCEPTED (128), + GTP_CAUSE_INVALID_MSG_FORMAT (193) /* FIXME */ }; diff --git a/sgsn/SGSN_Tests.ttcn b/sgsn/SGSN_Tests.ttcn index 92b744f..9029a9e 100644 --- a/sgsn/SGSN_Tests.ttcn +++ b/sgsn/SGSN_Tests.ttcn @@ -3727,6 +3727,167 @@ f_cleanup(); } +/* SGSN terminated SGSN Context Request procedure (we request, SGSN responds) + * 3GPP TS 23.401, Figure D.3.6-1: "Gn/Gp SGSN to MME Tracking Area Update procedure" */ +private function f_TC_sgsn_context_req_in(charstring id) runs on BSSGP_ConnHdlr { + var integer seq_nr := f_rnd_int(65535); + var Gtp1cUnitdata gtpc_ud; + timer T; + + var Gtp1cPeer peer := { + connId := 1, + remName := mp_sgsn_gtp_ip, + remPort := GTP1C_PORT + } + + /* The MS attaches to GERAN/UTRAN and enjoys the service */ + f_gmm_attach(false, false); + + /* The MS switches to an LTE cell and performs Tracking Area Update Request there. + * The MME requests information about the MS by sending SGSN Context Request. */ + var template (value) GTPC_PDUs ctx_req; + ctx_req := ts_SGSNContextReqPDU(rai := ts_RoutingAreaIdentity('250'H, 'F99'H, '4242'O, 'DE'O), + teic := '12345678'O, + sgsn_addr_control := f_inet_addr(mp_ggsn_ip), + ptmsi := ts_PTMSI(g_pars.p_tmsi), + ptmsi_sig := ts_PTMSI_sig('010203'O)); + GTP.send(ts_GTPC_SGSNContextReq(peer, seq_nr, ctx_req)); + + /* The SGSN responds with subscriber's IMSI */ + var template (present) GTPC_PDUs ctx_rsp; + ctx_rsp := tr_SGSNContextRespPDU(cause := GTP_CAUSE_REQUEST_ACCEPTED, + imsi := g_pars.imsi); + /* TODO: match MM/PDP Context, GSN Address */ + + T.start(2.0); + alt { + [] GTP.receive(tr_GTPC_SGSNContextResp(?, ?, ctx_rsp)) -> value gtpc_ud { + log("Rx SGSN Context Resp from SGSN, sending Ack"); + GTP.send(ts_GTPC_SGSNContextAck(gtpc_ud.peer, '12345678'O, seq_nr)); + setverdict(pass); + } + [] GTP.receive(tr_GTPC_SGSNContextResp) -> value gtpc_ud { + GTP.send(ts_GTPC_SGSNContextAck(gtpc_ud.peer, '12345678'O, seq_nr, + ts_SGSNContextAckPDU(GTP_CAUSE_INVALID_MSG_FORMAT))); + setverdict(fail, "Rx unexpected SGSN Context Resp"); + } + [] T.timeout { + setverdict(fail, "Timeout waiting for SGSN Context Resp"); + } + } + + /* HLR/HSS tells SGSN to forget this MS/UE */ + GSUP.send(ts_GSUP_CL_REQ(g_pars.imsi, OSMO_GSUP_CANCEL_TYPE_UPDATE)); + GSUP.receive(tr_GSUP_CL_RES(g_pars.imsi)); +} +testcase TC_sgsn_context_req_in() runs on test_CT { + var BSSGP_ConnHdlr vc_conn; + f_init(); + f_sleep(1.0); + vc_conn := f_start_handler(refers(f_TC_sgsn_context_req_in), testcasename(), g_gb, 72); + vc_conn.done; + f_cleanup(); +} + +/* SGSN originated SGSN Context Request procedure (SGSN requests, we respond) + * 3GPP TS 23.401, Figure D.3.5-1 "Routing Area Update procedure" */ +private function f_TC_sgsn_context_req_out(charstring id) runs on BSSGP_ConnHdlr { + var integer seq_nr := f_rnd_int(65535); + var Gtp1cUnitdata gtpc_ud; + timer T; + + /* The MS goes to GERAN/UTRAN from an LTE cell */ + f_send_l3(ts_GMM_RAU_REQ(mi_lv := valueof(ts_MI_TMSI_LV('DE42DE42'O)), + upd_type := GPRS_UPD_T_RA, + old_ra := f_random_RAI()), 0); + + + /* The SGSN has no idea about the MS and inquires the MME about it */ + T.start(2.0); + alt { + [] GTP.receive(tr_GTPC_SGSNContextReq(?, ?)) -> value gtpc_ud { + log("Rx SGSN Context Req from SGSN"); + setverdict(pass); + T.stop; + } + [] GTP.receive(tr_GTPC_SGSNContextResp) { + setverdict(fail, "Rx unexpected SGSN Context Req"); + mtc.stop; + } + [] BSSGP[0].receive(tr_LLC_XID_MT_CMD(?, ?)) { + /* Ignore XID Reset */ + repeat; + } + [] BSSGP[0].receive(tr_GMM_RAU_REJECT) { + /* osmo-sgsn -latest would send RAU Reject (Implicitly detached) */ + setverdict(fail, "Rx unexpected RAU Reject"); + mtc.stop; + } + [] T.timeout { + setverdict(fail, "Timeout waiting for SGSN Context Req"); + mtc.stop; + } + } + + /* The MME responds */ + var OCT8 kc := f_rnd_octstring(8); + + var template (value) PDP_Context_GTPC pdp_ctx; + pdp_ctx := ts_PDP_Context_GTPC(pdp_addr := f_inet_addr("10.10.10.10"), + ggsn_gsn_addr := f_inet_addr(mp_ggsn_ip), + apn := '08696E7465726E6574'O); + + var template (value) GTPC_PDUs ctx_rsp; + ctx_rsp := ts_SGSNContextRespPDU(cause := GTP_CAUSE_REQUEST_ACCEPTED, + imsi := g_pars.imsi, + teic := '12345678'O, + mm_context := ts_MM_ContextGSM(kc), + pdp_ctx_list := { pdp_ctx }); + GTP.send(ts_GTPC_SGSNContextResp(gtpc_ud.peer, '12345678'O, seq_nr, ctx_rsp)); + + /* TODO: Security Functions (auth/ciphering?) */ + + /* The SGSN ACKs */ + T.start(2.0); + alt { + [] GTP.receive(tr_GTPC_SGSNContextAck) -> value gtpc_ud { + log("Rx SGSN Context ACK from SGSN"); + setverdict(pass); + T.stop; + } + [] T.timeout { + setverdict(fail, "Timeout waiting for SGSN Contect ACK"); + mtc.stop; + } + } + + /* TODO: Update PDP Context Req/Resp */ + /* TODO: 7..10 Update Location, ISD */ + + /* RAU procedure completion */ + T.start(2.0); + alt { + [] as_routing_area_update_gb(0) { + log("RAU procedure completed"); + setverdict(pass); + T.stop; + } + [] BSSGP[0].receive { repeat; } + [] T.timeout { + setverdict(fail, "Timeout completing the RAU procedure"); + mtc.stop; + } + } +} +testcase TC_sgsn_context_req_out() runs on test_CT { + var BSSGP_ConnHdlr vc_conn; + f_init(); + f_sleep(1.0); + vc_conn := f_start_handler(refers(f_TC_sgsn_context_req_out), testcasename(), g_gb, 73); + vc_conn.done; + f_cleanup(); +} + control { execute( TC_attach() ); execute( TC_attach_mnc3() ); @@ -3803,6 +3964,9 @@ execute( TC_cell_change_different_ci_attach() ); execute( TC_cell_change_different_ci_data() ); + execute( TC_sgsn_context_req_in() ); + execute( TC_sgsn_context_req_out() ); + /* At the end, may crash osmo-sgsn, see OS#3957, OS#4245 */ execute( TC_attach_req_id_req_ra_update() ); } -- To view, visit https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/36589?usp=email 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: If71de10897a8a9f6612cd46c760cd89c0299ac2c Gerrit-Change-Number: 36589 Gerrit-PatchSet: 4 Gerrit-Owner: fixeria <vyanits...@sysmocom.de> Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: osmith <osm...@sysmocom.de> Gerrit-Reviewer: pespin <pes...@sysmocom.de> Gerrit-MessageType: merged