lynxis lazus has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/39255?usp=email )

Change subject: SGSN: add TC_attach_gmm_attach_req_while_gmm_attach_retransmit ......................................................................

SGSN: add TC_attach_gmm_attach_req_while_gmm_attach_retransmit

Extend the TC_attach_gmm_attach_req_while_gmm_attach by "loosing" an ID Req message.

Change-Id: I8d208c0a98675238dba439ab3e75758293928588 --- M sgsn/SGSN_Tests.ttcn 1 file changed, 89 insertions(+), 4 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks refs/changes/55/39255/1

diff --git a/sgsn/SGSN_Tests.ttcn b/sgsn/SGSN_Tests.ttcn index f8b9213..71b55c7 100644 --- a/sgsn/SGSN_Tests.ttcn +++ b/sgsn/SGSN_Tests.ttcn @@ -2073,10 +2073,11 @@ * MS <- SGSN: Identity Request IMSI * MS -> SGSN: Identity Response IMSI * MS -> SGSN: Attach Request (2nd) - * SGS -> HLR: SAI Request - * SGS <- HLR: SAI Response - * MS <- SGSN: Identity Request IMEI - * MS -> SGSN: Identity Response IMEI + * SGSN -> HLR: SAI Request + * SGSN <- HLR: SAI Response + * MS <- SGSN: Auth Req + * MS <- SGSN: Auth Resp + * SGSN <-> HLR: ULA/ISD * MS <- SGSN: Attach Accept * MS -> SGSN: Attach Complete */ @@ -2088,6 +2089,89 @@ f_cleanup(); }

+/* The main difference to f_TC_attach_gmm_attach_req_while_gmm_attach is the *lost* of the first ID Req */ +private function f_TC_attach_gmm_attach_req_while_gmm_attach_retransmit(charstring id) runs on BSSGP_ConnHdlr { + var integer count_req := 0; + var MobileL3_CommonIE_Types.MobileIdentityLV mi; + var RoutingAreaIdentificationV rand_rai := f_random_RAI(); + var PDU_L3_SGSN_MS l3_mt; + + g_pars.vec := f_gen_auth_vec_3g(); + g_pars.p_tmsi := f_random_ptmsi(suffix := '01'O); + + f_send_l3(ts_GMM_ATTACH_REQ(f_mi_get_lv(), rand_rai, true, false, omit, omit)); + + alt { + [] BSSGP[0].receive(tr_GMM_ATTACH_REJECT(?)) { + setverdict(fail, "Unexpected GMM ATTACH REJECT"); + mtc.stop; + } + [] BSSGP[0].receive(tr_GMM_ID_REQ('001'B)) { + mi := valueof(ts_MI_IMSI_LV(g_pars.imsi)); + f_send_l3(ts_GMM_ATTACH_REQ(f_mi_get_lv(), rand_rai, true, false, omit, omit)); + } + } + + alt { + [] BSSGP[0].receive(tr_GMM_ATTACH_REJECT(?)) { + setverdict(fail, "Unexpected GMM ATTACH REJECT"); + mtc.stop; + } + [] BSSGP[0].receive(tr_GMM_ID_REQ('001'B)) { + mi := valueof(ts_MI_IMSI_LV(g_pars.imsi)); + f_send_l3(ts_GMM_ID_RESP(mi)); + repeat; + } + [] BSSGP[0].receive(tr_GMM_ID_REQ('010'B)) { + /* send out a second GMM_Attach Request. + * If the SGSN follows the rules, this 2nd ATTACH REQ should be ignored, because + * of the same content */ + mi := valueof(ts_MI_IMEI_LV(g_pars.imei)); + repeat; + } + [] as_gmm_auth(umts_aka_challenge := true, expect_sai := true) {}; + } + f_sleep(1.0); + + /* we've sent already a IMEI answer, we should NOT asked again for IMEI */ + alt { + [] as_gmm_gsup_lu_isd() { repeat; }; + [] BSSGP[0].receive(tr_GMM_ATTACH_REJECT(?)) { + setverdict(fail, "Unexpected GMM ATTACH REJECT"); + mtc.stop; + } + [] BSSGP[0].receive(tr_GMM_ATTACH_ACCEPT('001'B, ?, ?)) -> value l3_mt { + f_process_attach_accept(l3_mt.msgs.gprs_mm.attachAccept); + f_send_l3(ts_GMM_ATTACH_COMPL); + setverdict(pass); + /* FIXME: Extract P-TMSI, if any. Only send Complete if necessary */ + } + } +} + +testcase TC_attach_gmm_attach_req_while_gmm_attach_retransmit() runs on test_CT { + /* Testing if the SGSN ignore Attach Request with the exact same content */ + /* MS -> SGSN: Attach Request TMSI + * MS <- SGSN: Identity Request IMSI + * MS -> SGSN: Attach Request (2nd) + * MS <- SGSN: Identity Request IMSI (retrans) + * SGSN -> HLR: SAI Request + * SGSN <- HLR: SAI Response + * MS <- SGSN: Auth Req + * MS <- SGSN: Auth Resp + * SGSN <-> HLR: ULA/ISD + * MS <- SGSN: Attach Accept + * MS -> SGSN: Attach Complete + */ + var BSSGP_ConnHdlr vc_conn; + f_init(); + f_sleep(1.0); + vc_conn := f_start_handler(refers(f_TC_attach_gmm_attach_req_while_gmm_attach_retransmit), testcasename(), g_gb, 39); + vc_conn.done; + f_cleanup(); +} + + private function f_TC_attach_usim_resync(charstring id) runs on BSSGP_ConnHdlr { var RoutingAreaIdentificationV old_ra := f_random_RAI();

@@ -3375,6 +3459,7 @@ execute( TC_attach_pdp_act_user_error_ind_ggsn() ); execute( TC_attach_pdp_act_gmm_detach() ); execute( TC_attach_gmm_attach_req_while_gmm_attach() ); + execute( TC_attach_gmm_attach_req_while_gmm_attach_retransmit() );

execute( TC_xid_empty_l3() ); execute( TC_xid_n201u() );