From d19fdf59b30abd612c2a233f5344b9e79e5a03b4 Mon Sep 17 00:00:00 2001 From: Pau Espin Pedrol Date: Thu, 19 Oct 2023 16:58:24 +0200 Subject: [PATCH] epdg: Test GTPv2C CreateSession triggerd by EPDG_Tunnel Req Change-Id: I8f18c927b1897806233cc9d049c25694c1e639d4 --- epdg/EPDG_Tests.ttcn | 78 ++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 75 insertions(+), 3 deletions(-) diff --git a/epdg/EPDG_Tests.ttcn b/epdg/EPDG_Tests.ttcn index f93b77baa..3a0c3a624 100644 --- a/epdg/EPDG_Tests.ttcn +++ b/epdg/EPDG_Tests.ttcn @@ -2,6 +2,7 @@ module EPDG_Tests { import from Misc_Helpers all; import from General_Types all; +import from Native_Functions all; import from Osmocom_Types all; import from L3_Common all; @@ -13,6 +14,8 @@ import from DIAMETER_Types all; import from DIAMETER_Templates all; import from DIAMETER_Emulation all; +import from GTPv2_Types all; +import from GTPv2_Templates all; import from GTPv2_Emulation all; modulepar { @@ -108,6 +111,17 @@ type component EPDG_ConnHdlr extends DIAMETER_ConnHdlr, GSUP_ConnHdlr, GTP2_Conn type record EPDG_ConnHdlrPars { hexstring imsi, + charstring ue_ip, + + /* TEI (Data) local side */ + OCT4 teid, + /* TEI (Control) local side */ + OCT4 teic, + /* TEI (Data) remote side */ + OCT4 teid_remote optional, + /* TEI (Control) remote side */ + OCT4 teic_remote optional, + AuthVector vec optional }; @@ -122,11 +136,15 @@ private function f_epdg_connhldr_S6b_expect_eteid(UINT32 ete_id) runs on EPDG_Co } } - private function f_init_pars(integer imsi_suffix := 1) runs on MTC_CT return EPDG_ConnHdlrPars { var EPDG_ConnHdlrPars pars := { imsi := f_gen_imsi(imsi_suffix), + ue_ip := "192.168.123.50", + teid := '00000000'O, + teic := '00000000'O, + teid_remote := omit, + teic_remote := omit, vec := f_gen_auth_vec_3g() }; return pars; @@ -231,7 +249,7 @@ private function f_init_gtp(charstring id) runs on MTC_CT { use_gtpu_daemon := false /* TODO: maybe use, set to true */ }; - vc_GTP2 := GTPv2_Emulation_CT.create("GTP2_EM"); + vc_GTP2 := GTPv2_Emulation_CT.create(id & "-GTPV2"); map(vc_GTP2:GTP2C, system:GTP2C); connect(vc_GTP2:TEID0, self:TEID0); vc_GTP2.start(GTPv2_Emulation.main(cfg)); @@ -255,6 +273,9 @@ private function f_init_handler(void_fn fn, charstring id, EPDG_ConnHdlrPars par /* tell GSUP dispatcher to send this IMSI to us */ f_create_gsup_expect(hex2str(g_pars.imsi)); + /* tell GTPv2 dispatcher to send this IMSI to us */ + f_gtp2_register_imsi(g_pars.imsi); + fn.apply(id); } @@ -266,9 +287,14 @@ runs on MTC_CT return EPDG_ConnHdlr { vc_conn := EPDG_ConnHdlr.create(id); + /* GSUP */ connect(vc_conn:GSUP, vc_GSUP:GSUP_CLIENT); connect(vc_conn:GSUP_PROC, vc_GSUP:GSUP_PROC); + /* GTP2 */ + connect(vc_conn:GTP2, vc_GTP2:CLIENT); + connect(vc_conn:GTP2_PROC, vc_GTP2:CLIENT_PROC); + /* SWx */ vc_conn_swx := DIAMETER_ConnHdlr_CT.create(id); connect(vc_conn_swx:DIAMETER, vc_SWx:DIAMETER_CLIENT); @@ -336,6 +362,36 @@ private altstep as_DIA_SWx_SA_success() runs on EPDG_ConnHdlr { } } +/* Diameter SWx SAR + SAA. */ +private altstep as_GTP2C_CreateSession_success() runs on EPDG_ConnHdlr { + var PDU_GTPCv2 rx_msg; + var template (value) FullyQualifiedTEID fteid_c_ie, fteid_u_ie; + var template (value) PDN_AddressAllocation paa; + + [] GTP2.receive(tr_GTP2C_CreateSessionReq(g_pars.imsi)) -> value rx_msg { + /* TODO: parse TEIC and TEID and store it in g_pars.remote_tei{c,d} */ + + /* allocate + register TEID-C on local side */ + g_pars.teic := f_gtp2_allocate_teid(); + g_pars.teid := g_pars.teic; + + fteid_c_ie := ts_GTP2C_FTEID(FTEID_IF_S2b_ePDG_GTPC, g_pars.teic, 0, + f_inet_addr(mp_s2b_local_ip), omit); + fteid_u_ie := ts_GTP2C_FTEID(FTEID_IF_S2bU_ePDG_GTPU, g_pars.teid, 2, + f_inet_addr(mp_s2b_local_ip), omit); + paa := ts_GTP2C_PdnAddrAlloc_v4(f_inet_addr(g_pars.ue_ip)); + GTP2.send(ts_GTP2C_CreateSessionResp({ fteid_c_ie }, paa)); + setverdict(pass); + } + [] GTP2.receive(PDU_GTPCv2:?) -> value rx_msg { + Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, log2str("Unexpected GTP2C msg rx: ", rx_msg)); + } +} +private function f_GTP2C_CreateSession_success() runs on EPDG_ConnHdlr { + f_gtp2_register_udmsg('20'O); + as_GTP2C_CreateSession_success(); +} + /* GSUP AuthInfo Req + Resp, triggers SWx MAR + MAA. */ private function f_GSUP_AI_success() runs on EPDG_ConnHdlr { var GSUP_PDU rx_gsup; @@ -363,7 +419,7 @@ private function f_GSUP_LU_success() runs on EPDG_ConnHdlr { var template octetstring destination_name := *; GSUP.send(ts_GSUP_UL_REQ(g_pars.imsi)); as_DIA_SWx_SA_success(); - /* Expect a positive response back to the translator; expect AIA */ + /* Expect a positive response back to the translator */ alt { [] GSUP.receive(tr_GSUP_UL_RES(g_pars.imsi, destination_name)); [] GSUP.receive(GSUP_PDU:?) -> value rx_gsup { @@ -373,9 +429,25 @@ private function f_GSUP_LU_success() runs on EPDG_ConnHdlr { setverdict(pass); } +/* GSUP TunnelEPDG Tunnel Req + Resp, triggers S2b CreateSession Req + Response. */ +private function f_GSUP_EPDGTunnel_success() runs on EPDG_ConnHdlr { + var GSUP_PDU rx_gsup; + GSUP.send(ts_GSUP_EPDGTunnel_REQ(g_pars.imsi)); + f_GTP2C_CreateSession_success(); + /* Expect a positive response back to the translator; */ + alt { + [] GSUP.receive(tr_GSUP_EPDGTunnel_RES(g_pars.imsi)); + [] GSUP.receive(GSUP_PDU:?) -> value rx_gsup { + Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, log2str("Unexpected GSUP msg rx: ", rx_gsup)); + } + } + setverdict(pass); +} + private function f_TC_authinfo_normal(charstring id) runs on EPDG_ConnHdlr { f_GSUP_AI_success(); f_GSUP_LU_success(); + f_GSUP_EPDGTunnel_success(); } testcase TC_authinfo_normal() runs on MTC_CT {