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osmo-ttcn3-hacks
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sgsn: Add TC_attach_timeout_after_pdp_act 

Related: OS#4221
Change-Id: Ib3e3c021707b707811388616e28d7d7cc22f7b53
This commit is contained in:
arehbein 2023-02-06 21:02:53 +01:00
parent 44d055fc39
commit 3ede9e32b0
1 changed files with 60 additions and 0 deletions
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60
sgsn/SGSN_Tests.ttcn
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@ -1017,6 +1017,65 @@ testcase TC_attach_umts_aka_gsm_sres() runs on test_CT {
f_cleanup();
}
/* Let T3350 expire while the MS holds an active PDP context (OS#4221). Do this by
* Establishing a PDP context and then resending an ATTACH REQUEST,
* making sure that exactly five ATTACH ACCEPTS are sent */
private function f_TC_attach_timeout_after_pdp_act(charstring id) runs on BSSGP_ConnHdlr {
var PdpActPars apars := valueof(t_PdpActPars(mp_ggsn_ip));
/* Vars needed for triggering T3350 timeouts */
const integer ran_index := 0;
/* See TS 24.008 Rel. 16 Sect. 4.7.3.1.6 c) */
const integer gmm_attach_repeats := 5;
/* See TS 24.008 Rel. 16 Table 11.4 */
const float T3350 := 6.0;
var template PDU_L3_MS_SGSN attach_req;
timer t_receive_GMM_ATTACH_ACCEPT;
var RoutingAreaIdentificationV rai := f_random_RAI();
/* First establish PDP context */
f_TC_attach(id);
f_pdp_ctx_act(apars);
/* Now, try another GPRS attach procedure. For further code comments up until receiving the attach
* accept from the SGSN, see definition of f_gmm_attach() */
attach_req := ts_GMM_ATTACH_REQ(f_mi_get_lv(), rai, false, false, omit, omit);
f_send_l3(attach_req, ran_index);
f_gmm_auth(false, false, ran_index);
f_gmm_gsup_lu_isd();
BSSGP[ran_index].clear;
log("Trying to receive ", gmm_attach_repeats, " ATTACH ACCEPTs");
for (var integer i := 1; i <= gmm_attach_repeats; i := i+1) {
t_receive_GMM_ATTACH_ACCEPT.start(T3350 + 0.5);
alt {
[] BSSGP[ran_index].receive(tr_GMM_ATTACH_ACCEPT('001'B, ?, ?)) {
t_receive_GMM_ATTACH_ACCEPT.stop;
}
[] t_receive_GMM_ATTACH_ACCEPT.timeout {
setverdict(fail, "Timeout on receiving ", i, "th ATTACH ACCEPT")
}
}
}
log("Have received ", gmm_attach_repeats, " ATTACH ACCEPT messages");
log("Make sure not more than ", gmm_attach_repeats, " ATTACH ACCEPT messages are sent");
t_receive_GMM_ATTACH_ACCEPT.start(T3350 + 0.5);
alt {
[] BSSGP[ran_index].receive(tr_GMM_ATTACH_ACCEPT('001'B, ?, ?)) {
setverdict(fail, "Received ", gmm_attach_repeats + 1, "th ATTACH ACCEPT")
}
[] t_receive_GMM_ATTACH_ACCEPT.timeout { }
}
setverdict(pass);
}
testcase TC_attach_timeout_after_pdp_act() runs on test_CT {
var BSSGP_ConnHdlr vc_conn;
f_init();
vc_conn := f_start_handler(refers(f_TC_attach_timeout_after_pdp_act), testcasename(), g_gb, 21);
f_cleanup();
}
/* MS never responds to ID REQ, expect ATTACH REJECT */
private function f_TC_attach_auth_id_timeout(charstring id) runs on BSSGP_ConnHdlr {
var RoutingAreaIdentificationV old_ra := f_random_RAI();
@ -3630,6 +3689,7 @@ control {
execute( TC_attach_mnc3() );
execute( TC_attach_umts_aka_umts_res() );
execute( TC_attach_umts_aka_gsm_sres() );
execute( TC_attach_timeout_after_pdp_act() );
execute( TC_attach_auth_id_timeout() );
execute( TC_attach_auth_sai_timeout() );
execute( TC_attach_auth_sai_reject() );