<p>fixeria has uploaded this change for <strong>review</strong>.</p><p><a href="https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/14476">View Change</a></p><pre style="font-family: monospace,monospace; white-space: pre-wrap;">MSC_Tests.ttcn: introduce TC_proc_ss_abort<br><br>This test case is aimed to verify HLR-/EUSE-initiated abort of an<br>active SS/USSD session according to the following scenario:<br><br> 1. (HLR/EUSE -> MSC) GSUP_PROC_SS_REQ with random facility;<br> 2. Network-originated connection establishment:<br> 2.a. (MSC -> BSC -> MS) Paging Request;<br> 2.b. ...<br> 2.c. (MS -> BSC -> MSC) Paging Response;<br> 3. (MSC -> MS) GSM 04.80 REGISTER with random facility;<br> 4. (HLR/EUSE -> MSC) GSUP_PROC_SS_ERR (abort);<br> 5. (MSC -> MS) GSM 04.80 RELEASE COMPLETE;<br> 6. Connection release.<br><br>As can be seen, HLR/EUSE initiates the session abort right after<br>the GSM 04.80 REGISTER message is delivered to the MS, and just<br>before the MS sends anything back in response.<br><br>Change-Id: I5586a88136c936441a842f49248824680603672e<br>Related: OS#2931<br>---<br>M msc/MSC_Tests.ttcn<br>1 file changed, 86 insertions(+), 0 deletions(-)<br><br></pre><pre style="font-family: monospace,monospace; white-space: pre-wrap;">git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks refs/changes/76/14476/1</pre><pre style="font-family: monospace,monospace; white-space: pre-wrap;"><span>diff --git a/msc/MSC_Tests.ttcn b/msc/MSC_Tests.ttcn</span><br><span>index b5a3ba7..b0834a4 100644</span><br><span>--- a/msc/MSC_Tests.ttcn</span><br><span>+++ b/msc/MSC_Tests.ttcn</span><br><span>@@ -3608,6 +3608,91 @@</span><br><span> vc_conn.done;</span><br><span> }</span><br><span> </span><br><span style="color: hsl(120, 100%, 40%);">+/* MT (network-originated) USSD followed by immediate abort */</span><br><span style="color: hsl(120, 100%, 40%);">+friend function f_tc_proc_ss_abort(charstring id, BSC_ConnHdlrPars pars)</span><br><span style="color: hsl(120, 100%, 40%);">+runs on BSC_ConnHdlr {</span><br><span style="color: hsl(120, 100%, 40%);">+ var octetstring facility := f_rnd_octstring(23);</span><br><span style="color: hsl(120, 100%, 40%);">+ var OCT4 sid := '20000555'O;</span><br><span style="color: hsl(120, 100%, 40%);">+ timer TP := 2.0;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ f_init_handler(pars);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Perform location update */</span><br><span style="color: hsl(120, 100%, 40%);">+ f_perform_lu();</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ f_ran_register_imsi(g_pars.imsi, 'FFFFFFFF'O);</span><br><span style="color: hsl(120, 100%, 40%);">+ f_create_gsup_expect(hex2str(g_pars.imsi));</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* PROC_SS_REQ initiates a mobile-originated SS/USSD session */</span><br><span style="color: hsl(120, 100%, 40%);">+ var template (value) GSUP_PDU gsup_req := ts_GSUP_PROC_SS_REQ(</span><br><span style="color: hsl(120, 100%, 40%);">+ imsi := g_pars.imsi, sid := sid,</span><br><span style="color: hsl(120, 100%, 40%);">+ state := OSMO_GSUP_SESSION_STATE_BEGIN,</span><br><span style="color: hsl(120, 100%, 40%);">+ ss := facility</span><br><span style="color: hsl(120, 100%, 40%);">+ );</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* On the MS side, we expect GSM 04.80 REGISTER message */</span><br><span style="color: hsl(120, 100%, 40%);">+ var template PDU_ML3_NW_MS dtap_reg := tr_ML3_MT_SS_REGISTER(</span><br><span style="color: hsl(120, 100%, 40%);">+ tid := 0, /* Most likely, it should be 0 */</span><br><span style="color: hsl(120, 100%, 40%);">+ ti_flag := c_TIF_ORIG, /* Sent from the side that originates the TI */</span><br><span style="color: hsl(120, 100%, 40%);">+ facility := facility</span><br><span style="color: hsl(120, 100%, 40%);">+ );</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* PROC_SS_ERR with SESSION_STATE_END terminates the SS/USSD session */</span><br><span style="color: hsl(120, 100%, 40%);">+ var template (value) GSUP_PDU gsup_abort := ts_GSUP_PROC_SS_ERR(</span><br><span style="color: hsl(120, 100%, 40%);">+ imsi := g_pars.imsi, sid := sid,</span><br><span style="color: hsl(120, 100%, 40%);">+ state := OSMO_GSUP_SESSION_STATE_END,</span><br><span style="color: hsl(120, 100%, 40%);">+ cause := 0 /* FIXME: introduce an enumerated type! */</span><br><span style="color: hsl(120, 100%, 40%);">+ );</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* On the MS side, we expect GSM 04.80 REGISTER message */</span><br><span style="color: hsl(120, 100%, 40%);">+ var template PDU_ML3_NW_MS dtap_rel := tr_ML3_MT_SS_RELEASE_COMPLETE(</span><br><span style="color: hsl(120, 100%, 40%);">+ tid := 0, /* Most likely, it should be 0 */</span><br><span style="color: hsl(120, 100%, 40%);">+ ti_flag := c_TIF_ORIG, /* Sent from the side that originates the TI */</span><br><span style="color: hsl(120, 100%, 40%);">+ cause := *, /* FIXME: expect some specific cause value */</span><br><span style="color: hsl(120, 100%, 40%);">+ facility := omit</span><br><span style="color: hsl(120, 100%, 40%);">+ );</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Initiate a MT USSD with random payload */</span><br><span style="color: hsl(120, 100%, 40%);">+ GSUP.send(gsup_req);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Expect Paging Request */</span><br><span style="color: hsl(120, 100%, 40%);">+ TP.start;</span><br><span style="color: hsl(120, 100%, 40%);">+ alt {</span><br><span style="color: hsl(120, 100%, 40%);">+ [pars.ran_is_geran] BSSAP.receive(tr_BSSMAP_Paging(g_pars.imsi)) {</span><br><span style="color: hsl(120, 100%, 40%);">+ setverdict(pass);</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ [not pars.ran_is_geran] BSSAP.receive(tr_RANAP_Paging(cs_domain, imsi_hex2oct(g_pars.imsi))) {</span><br><span style="color: hsl(120, 100%, 40%);">+ setverdict(pass);</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ /* We don't expect anything else */</span><br><span style="color: hsl(120, 100%, 40%);">+ [] as_unexp_gsup_or_bssap_msg();</span><br><span style="color: hsl(120, 100%, 40%);">+ [] TP.timeout {</span><br><span style="color: hsl(120, 100%, 40%);">+ setverdict(fail, "Timeout waiting for Paging Request");</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Send Paging Response and establish connection */</span><br><span style="color: hsl(120, 100%, 40%);">+ f_establish_fully(EST_TYPE_PAG_RESP);</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Expect MT REGISTER message with random facility */</span><br><span style="color: hsl(120, 100%, 40%);">+ f_expect_mt_dtap_msg(dtap_reg);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* HLR/EUSE decides to abort the session even</span><br><span style="color: hsl(120, 100%, 40%);">+ * before getting any response from the MS */</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Initiate a MT USSD with random payload */</span><br><span style="color: hsl(120, 100%, 40%);">+ GSUP.send(gsup_abort);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Expect RELEASE COMPLETE on ths MS side */</span><br><span style="color: hsl(120, 100%, 40%);">+ f_expect_mt_dtap_msg(dtap_rel);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ f_expect_clear();</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+testcase TC_proc_ss_abort() runs on MTC_CT {</span><br><span style="color: hsl(120, 100%, 40%);">+ var BSC_ConnHdlr vc_conn;</span><br><span style="color: hsl(120, 100%, 40%);">+ f_init();</span><br><span style="color: hsl(120, 100%, 40%);">+ vc_conn := f_start_handler(refers(f_tc_proc_ss_abort), 102);</span><br><span style="color: hsl(120, 100%, 40%);">+ vc_conn.done;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span> </span><br><span> /* A5/1 only permitted on network side; attempt an invalid CIPHER MODE COMPLETE with A5/3 which MSC should reject. */</span><br><span> private function f_tc_cipher_complete_with_invalid_cipher(charstring id, BSC_ConnHdlrPars pars) runs on BSC_ConnHdlr {</span><br><span>@@ -5459,6 +5544,7 @@</span><br><span> execute( TC_mt_ussd_for_unknown_subscr() );</span><br><span> execute( TC_proc_ss_for_unknown_session() );</span><br><span> execute( TC_proc_ss_paging_fail() );</span><br><span style="color: hsl(120, 100%, 40%);">+ execute( TC_proc_ss_abort() );</span><br><span> </span><br><span> execute( TC_cipher_complete_with_invalid_cipher() );</span><br><span> execute( TC_cipher_complete_1_without_cipher() );</span><br><span></span><br></pre><p>To view, visit <a href="https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/14476">change 14476</a>. 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<div style="display:none"> Gerrit-Project: osmo-ttcn3-hacks </div>
<div style="display:none"> Gerrit-Branch: master </div>
<div style="display:none"> Gerrit-Change-Id: I5586a88136c936441a842f49248824680603672e </div>
<div style="display:none"> Gerrit-Change-Number: 14476 </div>
<div style="display:none"> Gerrit-PatchSet: 1 </div>
<div style="display:none"> Gerrit-Owner: fixeria <axilirator@gmail.com> </div>
<div style="display:none"> Gerrit-MessageType: newchange </div>