epdg: Introduce test TC_hss_initiated_deregister_permanent_termination

Change-Id: I50daa7a04e0f19dbf987a8baba7a979a353089a3

4 files changed, 136 insertions, 3 deletions

diff --git a/epdg/EPDG_Tests.ttcn b/epdg/EPDG_Tests.ttcn
index 31963f44..71b65c0d 100644
--- a/epdg/EPDG_Tests.ttcn
+++ b/epdg/EPDG_Tests.ttcn
@@ -478,6 +478,7 @@ private function f_DIA_SWx_RT(template (value) CxDx_3GPP_Reason_Code reason_code
 	var UINT32 hbh_id := f_rnd_octstring(4);
 	var UINT32 ete_id := f_rnd_octstring(4);
 	var octetstring reason_info := char2oct("test");
+	var CxDx_3GPP_Reason_Code reason_code_permanent_termination := PERMANENT_TERMINATION;
 
 	/* Unlike STR, STA contains no IMSI. Register ete_id in DIAMETER_Emulation,
 	 * so AIA is forwarded back to us in DIAMETER port instead of MTC_CT.DIAMETER_UNIT.
@@ -488,6 +489,14 @@ private function f_DIA_SWx_RT(template (value) CxDx_3GPP_Reason_Code reason_code
 				hbh_id := hbh_id,
 				ete_id := ete_id));
 
+	if (match(reason_code_permanent_termination, reason_code)) {
+		/* Expect Abort-Session procedure (ASR + ASA) in the S6b interface: */
+		as_DIA_S6b_AS_success();
+		/* Here AAA-Server starts an ASR + ASA procedure towards ePDG, which forwards it to strongswan: */
+		as_GSUP_rx_CL_REQ(OSMO_GSUP_CANCEL_TYPE_WITHDRAW);
+		f_GSUP_tx_CL_RES();
+	}
+
 	alt {
 	[] SWx.receive(tr_DIA_SWx_RTA(exp_result_tmpl, hbh_id := hbh_id, ete_id := ete_id)) -> value rx_dia {}
 	[] SWx.receive(PDU_DIAMETER:?) -> value rx_dia {
@@ -549,6 +558,25 @@ private function f_S6b_ST_success() runs on EPDG_ConnHdlr {
 	}
 }
 
+/* Diameter S6b ASR + ASA, TS 29.273 9.1.2.3.4. */
+private altstep as_DIA_S6b_AS_success() runs on EPDG_ConnHdlr {
+	var PDU_DIAMETER rx_dia;
+	var template (omit) AVP avp;
+	var octetstring sess_id;
+	[] S6b.receive(tr_DIA_S6b_ASR(f_nai())) -> value rx_dia {
+		avp := f_DIAMETER_get_avp(rx_dia, c_AVP_Code_BASE_NONE_Session_Id);
+		sess_id := valueof(avp.avp_data.avp_BASE_NONE_Session_Id);
+		SWx.send(ts_DIA_S6b_ASA(DIAMETER_SUCCESS,
+					sess_id := sess_id,
+					hbh_id := rx_dia.hop_by_hop_id,
+					ete_id := rx_dia.end_to_end_id));
+		setverdict(pass);
+	}
+	[] S6b.receive(PDU_DIAMETER:?) -> value rx_dia {
+		Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, log2str("Unexpected Diameter msg rx: ", rx_dia));
+	}
+}
+
 private function f_exp_tr_GTP2C_APCO_in_CreateSessionReq()
 		runs on EPDG_ConnHdlr return template (present) APCO {
 	var template ProtocolIDs_and_ContainerIDs protos, protosV4, protosV6, protosV46;
@@ -796,6 +824,10 @@ private altstep as_GTPU_rx_icmp4(template (present) PDU_ICMP expected := ?) runs
 	}
 }
 
+/************
+ * GSUP CEAI
+ ************/
+
 private function f_GSUP_tx_SAI_REQ(boolean req_resync := false) runs on EPDG_ConnHdlr {
 	var GSUP_PDU rx_gsup;
 	var template (value) GSUP_IEs pdp_info;
@@ -811,7 +843,6 @@ private function f_GSUP_tx_SAI_REQ(boolean req_resync := false) runs on EPDG_Con
 	}
 }
 
-
 private altstep as_GSUP_rx_SAI_RES() runs on EPDG_ConnHdlr {
 	var GSUP_PDU rx_gsup;
 	var template (present) GSUP_IE auth_tuple_ie := tr_GSUP_IE_AuthTuple3G(
@@ -838,6 +869,20 @@ private altstep as_GSUP_rx_SAI_ERR(template (present) integer cause := ?) runs o
 	}
 }
 
+private altstep as_GSUP_rx_CL_REQ(template GSUP_CancelType ctype := omit) runs on EPDG_ConnHdlr {
+	var GSUP_PDU rx_gsup;
+
+	[] GSUP.receive(tr_GSUP_CL_REQ(g_pars.imsi, dom := *, ctype := ctype)) -> value rx_gsup {
+	}
+	[] GSUP.receive(GSUP_PDU:?) -> value rx_gsup {
+		Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, log2str("Unexpected GSUP msg rx: ", rx_gsup));
+	}
+}
+
+private function f_GSUP_tx_CL_RES() runs on EPDG_ConnHdlr {
+	GSUP.send(ts_GSUP_CL_RES(g_pars.imsi));
+}
+
 /* GSUP AuthInfo Req + Resp, triggers SWx MAR + MAA. */
 private function f_GSUP_AI_success(boolean req_resync := false) runs on EPDG_ConnHdlr {
 	f_GSUP_tx_SAI_REQ(req_resync);
@@ -1070,6 +1115,23 @@ testcase TC_hss_initiated_deregister_new_server_assigned() runs on MTC_CT {
 	setverdict(pass);
 }
 
+private function f_TC_hss_initiated_deregister_permanent_termination(charstring id) runs on EPDG_ConnHdlr {
+	f_initial_attach();
+	/* Procedure should be performed properly: */
+	f_DIA_SWx_RT(PERMANENT_TERMINATION, tr_AVP_ResultCode(DIAMETER_SUCCESS));
+	/* Subscriber was already removed, it should fail if requested again: */
+	var DIAMETER_ts29_229_ExperimentalResultcode erc := DIAMETER_ERROR_USER_UNKNOWN;
+	f_DIA_SWx_RT(PERMANENT_TERMINATION, tr_AVP_ExperimentalResult(vendor_id_3GPP, int2oct(enum2int(erc), 4)));
+}
+testcase TC_hss_initiated_deregister_permanent_termination() runs on MTC_CT {
+	var EPDG_ConnHdlrPars pars := f_init_pars();
+	var EPDG_ConnHdlr vc_conn;
+	f_init();
+	vc_conn := f_start_handler(refers(f_TC_hss_initiated_deregister_permanent_termination), pars);
+	vc_conn.done;
+	setverdict(pass);
+}
+
 private function f_TC_concurrent_ues(charstring id) runs on EPDG_ConnHdlr {
 	COORD.send(COORD_CMD_READY);
 	COORD.receive(COORD_CMD_START);
@@ -1167,6 +1229,7 @@ control {
 	execute ( TC_ho_wifi_to_lte() );
 	execute ( TC_s2b_CreateSession_rejected() );
 	execute ( TC_hss_initiated_deregister_new_server_assigned() );
+	execute ( TC_hss_initiated_deregister_permanent_termination() );
 	execute ( TC_concurrent_ues2() );
 	execute ( TC_concurrent_ues100() );
 	execute ( TC_upf_echo_req() );
diff --git a/epdg/expected-results.xml b/epdg/expected-results.xml
index bb288119..ccc69cb3 100644
--- a/epdg/expected-results.xml
+++ b/epdg/expected-results.xml
@@ -8,6 +8,7 @@
   <testcase classname='EPDG_Tests' name='TC_ho_wifi_to_lte' time='MASKED'/>
   <testcase classname='EPDG_Tests' name='TC_s2b_CreateSession_rejected' time='MASKED'/>
   <testcase classname='EPDG_Tests' name='TC_hss_initiated_deregister_new_server_assigned' time='MASKED'/>
+  <testcase classname='EPDG_Tests' name='TC_hss_initiated_deregister_permanent_termination' time='MASKED'/>
   <testcase classname='EPDG_Tests' name='TC_concurrent_ues2' time='MASKED'/>
   <testcase classname='EPDG_Tests' name='TC_concurrent_ues100' time='MASKED'/>
   <testcase classname='EPDG_Tests' name='TC_upf_echo_req' time='MASKED'/>
diff --git a/library/DIAMETER_Templates.ttcn b/library/DIAMETER_Templates.ttcn
index 31ea8216..933c97b4 100644
--- a/library/DIAMETER_Templates.ttcn
+++ b/library/DIAMETER_Templates.ttcn
@@ -569,11 +569,11 @@ template (value) GenericAVP ts_AVP_SuppVendorIdRaw(uint32_t vendor_id) := {
 template (value) GenericAVP ts_AVP_SuppVendorId(Vendor_Id vendor_id) :=
 	ts_AVP_SuppVendorIdRaw(enum2int(vendor_id));
 
-template (value) GenericAVP ts_AVP_ResultCode(DIAMETER_Resultcode res_code) := {
+template (value) GenericAVP ts_AVP_ResultCode(template (value) DIAMETER_Resultcode res_code) := {
 	avp := {
 		avp_header := ts_DIA_Hdr(c_AVP_Code_BASE_NONE_Result_Code),
 		avp_data := {
-			avp_BASE_NONE_Result_Code := int2oct(enum2int(res_code), 4)
+			avp_BASE_NONE_Result_Code := int2oct(enum2int(valueof(res_code)), 4)
 		}
 	}
 }
diff --git a/library/DIAMETER_ts29_273_Templates.ttcn b/library/DIAMETER_ts29_273_Templates.ttcn
index 0a42d6a6..e1a07006 100644
--- a/library/DIAMETER_ts29_273_Templates.ttcn
+++ b/library/DIAMETER_ts29_273_Templates.ttcn
@@ -486,4 +486,73 @@ tr_DIA_S6b_STA(template (present) DIAMETER_Resultcode res_code := ?,
 			/* Lots other Optional */
 	));
 
+
+/* TS 29.273 9.2.2.4.1 Abort-Session-Request (ASR) */
+template (present) PDU_DIAMETER
+tr_DIA_S6b_ASR(template (present) charstring username_nai := ?,
+	       template (present) octetstring sess_id := ?,
+	       template (present) charstring orig_host := ?,
+	       template (present) charstring orig_realm := ?,
+	       template (present) charstring dest_realm := ?,
+	       template (present) charstring dest_host := ?,
+	       template (present) UINT32 hbh_id := ?,
+	       template (present) UINT32 ete_id := ?) :=
+	tr_DIAMETER(flags := '1???????'B,
+		    cmd_code := Abort_Session,
+		    app_id := int2oct(c_DIAMETER_3GPP_S6b_AID, 4),
+		    hbh_id := hbh_id,
+		    ete_id := ete_id,
+		    avps := superset(
+			tr_AVP_SessionId(sess_id),
+			/* Optional: DRMP, */
+			tr_AVP_OriginHost(orig_host),
+			tr_AVP_OriginRealm(orig_realm),
+			tr_AVP_DestinationRealm(dest_realm),
+			tr_AVP_DestinationHost(dest_host),
+			tr_AVP_AuthAppId(int2oct(c_DIAMETER_3GPP_S6b_AID, 4)),
+			tr_AVP_UserName(char2oct_tmpl_present(username_nai)),
+			tr_AVP_AuthSessionState(NO_STATE_MAINTAINED)
+	));
+
+/* TS 29.273 9.2.2.4.2 Abort-Session-Answer (ASA) */
+template (present) PDU_DIAMETER
+tr_DIA_S6b_ASA(template (present) DIAMETER_Resultcode res_code := ?,
+	       template (present) octetstring sess_id := ?,
+	       template (present) charstring orig_host :=  ?,
+	       template (present) charstring orig_realm := ?,
+	       template (present) charstring dest_realm := ?,
+	       template (present) UINT32 hbh_id := ?,
+	       template (present) UINT32 ete_id := ?) :=
+	tr_DIAMETER(flags := '0???????'B,
+		    cmd_code := Abort_Session,
+		    app_id := int2oct(c_DIAMETER_3GPP_S6b_AID, 4),
+		    hbh_id := hbh_id, ete_id := ete_id,
+		    avps := superset(
+			tr_AVP_SessionId(sess_id),
+			/* Optional: DRMP */
+			tr_AVP_ResultCode(res_code),
+			tr_AVP_OriginHost(orig_host),
+			tr_AVP_OriginRealm(orig_realm)
+	));
+
+template (value) PDU_DIAMETER
+ts_DIA_S6b_ASA(template (value) DIAMETER_Resultcode res_code := DIAMETER_SUCCESS,
+	       template (value) octetstring sess_id := c_def_sess_id,
+	       template (value) charstring orig_host := "aaa.localdomain",
+	       template (value) charstring orig_realm := "localdomain",
+	       template (value) charstring dest_realm := "localdomain",
+	       template (value) UINT32 hbh_id := '00000000'O,
+	       template (value) UINT32 ete_id := '00000000'O) :=
+	ts_DIAMETER(flags := '01000000'B,
+		    cmd_code := Abort_Session,
+		    app_id := int2oct(c_DIAMETER_3GPP_S6b_AID, 4),
+		    hbh_id := hbh_id, ete_id := ete_id,
+		    avps := {
+			ts_AVP_SessionId(sess_id),
+			/* Optional: DRMP, */
+			ts_AVP_ResultCode(res_code),
+			ts_AVP_OriginHost(orig_host),
+			ts_AVP_OriginRealm(orig_realm)
+	});
+
 }