pgw: Introduce test TC_s2b_createSession_v4_no_apco
This test allows initial testing of a session creation through the S2b
interface (emulating an ePDG).
A follow-up test will be added to test the APCO IE (feature which
open5gs-smfd still doesn't support).
Change-Id: I38e469edf0e00feca5a648035b64645e2c905937
diff --git a/pgw/PGW_Tests.ttcn b/pgw/PGW_Tests.ttcn
index bd32760..e39bd62 100644
--- a/pgw/PGW_Tests.ttcn
+++ b/pgw/PGW_Tests.ttcn
@@ -20,6 +20,7 @@
import from DIAMETER_Templates all;
import from DIAMETER_ts29_212_Templates all;
import from DIAMETER_ts29_272_Templates all;
+import from DIAMETER_ts29_273_Templates all;
import from DIAMETER_ts32_299_Templates all;
import from DIAMETER_Emulation all;
@@ -39,6 +40,9 @@
charstring mp_ocs_local_ip := "127.0.0.9";
integer mp_ocs_local_port := 3869;
+ charstring mp_aaa_local_ip := "127.0.0.9";
+ integer mp_aaa_local_port := 3870;
+
charstring mp_diam_realm := "localdomain";
}
@@ -55,6 +59,10 @@
var DIAMETER_Emulation_CT vc_Gy;
port DIAMETER_PT Gy_UNIT;
port DIAMETEREM_PROC_PT Gy_PROC;
+ /* emulated AAA-Server */
+ var DIAMETER_Emulation_CT vc_S6b;
+ port DIAMETER_PT S6b_UNIT;
+ port DIAMETEREM_PROC_PT S6b_PROC;
/* global test case guard timer (actual timeout value is set in f_init()) */
timer T_guard;
}
@@ -97,6 +105,7 @@
port DIAMETER_Conn_PT Gx;
port DIAMETER_Conn_PT Gy;
+ port DIAMETER_Conn_PT S6b;
/* GTP-U IPv4 address remote sie */
var OCT4 g_gtpu4_remote;
@@ -128,7 +137,7 @@
hexstring imsi,
hexstring msisdn optional,
// serving network
- integer rat_type,
+ GTP2C_RAT_Type rat_type,
// flags?
charstring apn,
/* Apn subscribed or non-subscribed */
@@ -155,8 +164,13 @@
}
template (value) SessionPars
-t_SessionPars(hexstring imsi, charstring tundev, template (omit) hexstring msisdn := '1234'H, integer rat_type := 6, charstring apn := "internet",
- boolean selection_mode := false, BIT3 pdn_type := '001'B) := {
+t_SessionPars(hexstring imsi,
+ charstring tundev,
+ template (omit) hexstring msisdn := '1234'H,
+ GTP2C_RAT_Type rat_type := GTP2C_RAT_EUTRAN,
+ charstring apn := "internet",
+ boolean selection_mode := false,
+ BIT3 pdn_type := '001'B) := {
imsi := imsi,
msisdn := msisdn,
rat_type := rat_type,
@@ -228,8 +242,26 @@
connect(vc_Gy:DIAMETER_PROC, self:Gy_PROC);
vc_Gy.start(DIAMETER_Emulation.main(ops, pars, id));
+ /* S6b setup: */
+ pars := {
+ remote_ip := mp_pgw_hostname,
+ remote_sctp_port := -1,
+ local_ip := mp_aaa_local_ip,
+ local_sctp_port := mp_aaa_local_port,
+ origin_host := "aaa." & mp_diam_realm,
+ origin_realm := mp_diam_realm,
+ auth_app_id := c_DIAMETER_3GPP_S6b_AID,
+ vendor_app_id := c_DIAMETER_3GPP_S6b_AID
+ };
+ vc_S6b := DIAMETER_Emulation_CT.create(id);
+ map(vc_S6b:DIAMETER, system:DIAMETER_CODEC_PT);
+ connect(vc_S6b:DIAMETER_UNIT, self:S6b_UNIT);
+ connect(vc_S6b:DIAMETER_PROC, self:S6b_PROC);
+ vc_S6b.start(DIAMETER_Emulation.main(ops, pars, id));
+
f_diameter_wait_capability(Gx_UNIT);
f_diameter_wait_capability(Gy_UNIT);
+ f_diameter_wait_capability(S6b_UNIT);
/* Give some time for our emulation to get out of SUSPECT list of SUT (3 watchdong ping-pongs):
* RFC6733 sec 5.1
* RFC3539 sec 3.4.1 [5]
@@ -266,7 +298,7 @@
function f_start_handler(void_fn fn, template (omit) SessionPars pars_tmpl := omit)
runs on PGW_Test_CT return PGW_Session_CT {
var charstring id := testcasename();
- var DIAMETER_ConnHdlr_CT vc_conn_gx, vc_conn_gy;
+ var DIAMETER_ConnHdlr_CT vc_conn_gx, vc_conn_gy, vc_conn_s6b;
var PGW_Session_CT vc_conn;
var SessionPars pars;
@@ -296,6 +328,14 @@
vc_conn_gy.start(f_diam_connhldr_ct_main(pars.imsi));
}
+ if (isbound(vc_S6b)) {
+ vc_conn_s6b := DIAMETER_ConnHdlr_CT.create(id);
+ connect(vc_conn_s6b:DIAMETER, vc_S6b:DIAMETER_CLIENT);
+ connect(vc_conn_s6b:DIAMETER_PROC, vc_S6b:DIAMETER_PROC);
+ connect(vc_conn:S6b, vc_conn_s6b:DIAMETER_CLIENT);
+ vc_conn_s6b.start(f_diam_connhldr_ct_main(pars.imsi));
+ }
+
vc_conn.start(f_handler_init(fn, pars));
return vc_conn;
}
@@ -325,6 +365,28 @@
return f_concat_pad(15, '26242'H, suffix);
}
+/* S6b emulation (AAA-Server) */
+private altstep as_DIA_S6b_AAR() runs on PGW_Session_CT {
+ var PDU_DIAMETER rx_dia;
+ [] S6b.receive(tr_DIA_S6b_AAR()) -> value rx_dia {
+ var template (omit) AVP avp;
+ var octetstring sess_id;
+
+ 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);
+
+ S6b.send(ts_DIA_S6b_AAA(sess_id, "aaa." & mp_diam_realm,
+ mp_diam_realm, mp_diam_realm,
+ rx_dia.hop_by_hop_id, rx_dia.end_to_end_id));
+ setverdict(pass);
+ }
+ [] S6b.receive(PDU_DIAMETER:?) -> value rx_dia {
+ Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail,
+ log2str("Received unexpected DIAMETER ", rx_dia));
+ }
+}
+
+/* Gx emulation (PCRF)*/
private altstep as_DIA_Gx_CCR(DCC_NONE_CC_Request_Type req_type) runs on PGW_Session_CT {
var PDU_DIAMETER rx_dia;
[] Gx.receive(tr_DIA_Gx_CCR(req_type := req_type)) -> value rx_dia {
@@ -347,6 +409,7 @@
}
}
+/* Gy emulation (OCS) */
function f_tr_DIA_Gy_CCR(DCC_NONE_CC_Request_Type req_type)
runs on PGW_Session_CT return template (present) PDU_DIAMETER
{
@@ -359,7 +422,7 @@
var template (present) OCT1 nsapi := ?;
imsi := char2oct(f_dec_TBCD(imsi_hex2oct(g_pars.imsi)));
//msisdn := char2oct(f_dec_TBCD(substr(ctx_val.msisdn, 1, lengthof(ctx_val.msisdn) -1)));
- rat_type := int2oct(g_pars.rat_type, 1);
+ rat_type := int2oct(enum2int(g_pars.rat_type), 1);
charging_char := char2oct(oct2str('0000'O)); // f_s5s8_create_session() uses hardcoded chg_car := '0000'O
nsapi := int2oct(g_pars.bearer.ebi, 1);
select (req_type) {
@@ -538,6 +601,10 @@
}
}
+/* GTPv2C */
+private function is_s2b_iface() runs on PGW_Session_CT return boolean {
+ return (g_pars.rat_type == GTP2C_RAT_WLAN or g_pars.rat_type == GTP2C_RAT_Virtual);
+}
/* find TEID of given interface type (and optionally instance) */
private function f_find_teid(FullyQualifiedTEID_List list,
@@ -558,12 +625,23 @@
/* process one to-be-created bearer context */
private function process_bctx_create(BearerContextGrouped bctx) runs on PGW_Session_CT
{
- /* FIXME: EPS Bearer ID */
+ g_pars.bearer.ebi := bctx.bearerContextIEs.ePS_Bearer_ID.ePS_Bearer_ID_Value;
/* FIXME: Cause */
+ var integer exp_fteid_if_type;
+ var BIT4 exp_fteid_instance;
+ if (is_s2b_iface()) {
+ exp_fteid_if_type := 33;
+ exp_fteid_instance := '0100'B;
+ } else {
+ exp_fteid_if_type := 5;
+ exp_fteid_instance := '0010'B;
+ }
+
/* find F-TEID of the P-GW U side */
var FullyQualifiedTEID rx_fteid;
- rx_fteid := valueof(f_find_teid(bctx.bearerContextIEs.fullyQualifiedTEID, 5, '0010'B));
+ rx_fteid := valueof(f_find_teid(bctx.bearerContextIEs.fullyQualifiedTEID,
+ exp_fteid_if_type, exp_fteid_instance));
g_pars.bearer.teid_remote := rx_fteid.tEID_GRE_Key;
if (rx_fteid.v4_Flag == '1'B) {
g_gtpu4_remote := rx_fteid.iPv4_Address;
@@ -601,10 +679,19 @@
template (omit) UserLocationInfo uli_ie := omit) runs on PGW_Session_CT {
var PDU_GTPCv2 rx;
+ /* Defaults used for s5/s8: */
+ var boolean do_s6b := false;
+ var template APN_Restriction apn_restriction := ?;
+ /* Change behavior when on S2b: */
+ if (is_s2b_iface()) {
+ do_s6b := true;
+ apn_restriction := omit;
+ }
+
var template (value) PDU_GTPCv2 g2c :=
ts_GTP2C_CreateSessionReq(imsi := g_pars.imsi,
msisdn := g_pars.msisdn,
- rat_type := g_pars.rat_type,
+ rat_type := enum2int(g_pars.rat_type),
sender_fteid := fteid_c_ie,
apn := f_enc_dns_hostname(g_pars.apn),
pdn_type := g_pars.pdn_type,
@@ -615,14 +702,20 @@
g2c.gtpcv2_pdu.createSessionRequest.servingNetwork := ts_GTP2C_ServingNetwork('001'H, '01F'H);
GTP2.send(g2c);
+ if (do_s6b and S6b.checkstate("Connected")) {
+ as_DIA_S6b_AAR();
+ }
if (Gx.checkstate("Connected")) {
as_DIA_Gx_CCR(INITIAL_REQUEST);
}
+ /* FIXME: When on S2b interface, SMF is not using the Gy interface, unknown reason. */
if (Gy.checkstate("Connected")) {
as_DIA_Gy_CCR(INITIAL_REQUEST);
}
alt {
- [] GTP2.receive(tr_GTP2C_CreateSessionResp(d_teid:=g_pars.teic_local, cause:=Request_accepted)) -> value rx {
+ [] GTP2.receive(tr_GTP2C_CreateSessionResp(d_teid := g_pars.teic_local,
+ cause := Request_accepted,
+ apn_restriction := apn_restriction)) -> value rx {
/* extract TEIDs */
var CreateSessionResponse resp := rx.gtpcv2_pdu.createSessionResponse;
g_pars.teic_remote := resp.fullyQualifiedTEID[0].tEID_GRE_Key;
@@ -686,6 +779,25 @@
}
+/* create a session on the PGW on a S2b interface (from ePDG)*/
+private function f_s2b_create_session() runs on PGW_Session_CT {
+ var template (value) FullyQualifiedTEID fteid_c_ie, fteid_u_ie;
+ var template (value) UserLocationInfo uli_ie;
+
+ fteid_c_ie := ts_GTP2C_FTEID(FTEID_IF_S2b_ePDG_GTPC, g_pars.teic_local, 0,
+ f_inet_addr(mp_local_hostname_c), omit);
+ fteid_u_ie := ts_GTP2C_FTEID(FTEID_IF_S2bU_ePDG_GTPU, g_pars.bearer.teid_local, 5,
+ f_inet_addr(mp_local_hostname_u), omit);
+ f_create_session(fteid_c_ie, fteid_u_ie);
+ /* open5gs up to 1.2.3 won't accept it without ULI, despite not mandatory */
+ var template (value) TAI tai := { '0'H, '0'H, '1'H, 'F'H, '0'H, '1'H, '0001'O };
+ var template (value) ECGI ecgi := { '0'H, '0'H, '1'H, 'F'H, '0'H, '1'H, '0'H, 23 };
+ uli_ie := ts_GTP2C_UserLocInfo(tai := tai, ecgi := ecgi);
+
+ f_create_session(fteid_c_ie, fteid_u_ie, uli_ie);
+
+}
+
/* delete the session from the PGW */
private function f_delete_session(template (omit) GTP2C_Cause tx_cause := omit,
template (present) OCT4 exp_teid,
@@ -934,6 +1046,21 @@
vc_conn.done;
}
+/* create a session, expect it to succeed */
+private function f_TC_s2b_createSession_v4_noapco() runs on PGW_Session_CT {
+ f_s2b_create_session();
+ setverdict(pass);
+}
+testcase TC_s2b_createSession_v4_noapco() runs on PGW_Test_CT {
+ var PGW_Session_CT vc_conn;
+ var SessionPars pars := valueof(t_SessionPars('001010123456789'H,
+ "tun22",
+ rat_type := GTP2C_RAT_WLAN));
+ f_init();
+ vc_conn := f_start_handler(refers(f_TC_s2b_createSession_v4_noapco), pars);
+ vc_conn.done;
+}
+
control {
execute( TC_tx_echo() );
execute( TC_createSession() );
@@ -942,6 +1069,7 @@
execute( TC_createSession_deleteSession() );
execute( TC_deleteSession_unknown() );
execute( TC_gy_charging_cc_time() );
+ execute( TC_s2b_createSession_v4_noapco() );
}