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MSC_Tests.ttcn: introduce TC_mm_id_resp_no_identity 

While investigating OS#4340, it was discovered that a malformed
MM Identity Request with MI Type '111'B crashes OsmoMSC.

Unfortunately, I could not find a way to encode such an invalid
message in TITAN (because value '111'B is reserved), so I
figured out that '000'B also crashes OsmoMSC.

MM Identity Request is triggered by initiating an Update Location
Request with reserved TMSI value 'FFFFFFFF'O (unknown to the MSC).

Change-Id: I62f23355eb91df2edf9dc837c928cb86b530b743
Related: OS#4340
This commit is contained in:
Vadim Yanitskiy 2019-12-28 17:45:34 +01:00 committed by fixeria
parent 322c79367b
commit eddebaad92
1 changed files with 38 additions and 0 deletions
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38
msc/MSC_Tests.ttcn
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@ -5778,6 +5778,43 @@ testcase TC_invalid_mgcp_crash() runs on MTC_CT {
vc_conn.done;
}
friend function f_tc_mm_id_resp_no_identity(charstring id, BSC_ConnHdlrPars pars)
runs on BSC_ConnHdlr {
pars.tmsi := 'FFFFFFFF'O;
f_init_handler(pars);
f_create_gsup_expect(hex2str(g_pars.imsi));
/* Initiate Location Updating using an unknown TMSI */
f_bssap_compl_l3(f_build_lu_tmsi(pars.tmsi));
/* Expect an Identity Request, send response with no identity */
BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_MM_ID_Req(CM_ID_TYPE_IMSI)));
BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_MM_ID_Rsp({
lengthIndicator := 1,
mobileIdentityV := {
typeOfIdentity := '000'B,
oddEvenInd_identity := {
no_identity := {
oddevenIndicator := '0'B,
fillerDigits := '00000'H
}
}
}
})));
f_expect_lu_reject();
f_expect_clear();
}
testcase TC_mm_id_resp_no_identity() runs on MTC_CT {
var BSC_ConnHdlr vc_conn;
f_init();
vc_conn := f_start_handler(refers(f_tc_mm_id_resp_no_identity), 7);
vc_conn.done;
}
control {
execute( TC_cr_before_reset() );
execute( TC_lu_imsi_noauth_tmsi() );
@ -5910,6 +5947,7 @@ control {
execute( TC_lu_and_mt_call_osmux() );
}
execute( TC_invalid_mgcp_crash() );
execute( TC_mm_id_resp_no_identity() );
}