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osmo-ttcn3-hacks
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epdg: Test UE-initiated Detach Procedure 

Related: OS#6333
Change-Id: I19114c69119e42622f323378dd356217d107cb32
This commit is contained in:
Pau Espin 2024-01-24 17:23:01 +01:00
parent a518d05e9b
commit 4944a5cee6
3 changed files with 126 additions and 6 deletions
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72
epdg/EPDG_Tests.ttcn
View File

@ -359,7 +359,7 @@ private altstep as_DIA_SWx_MA_success() runs on EPDG_ConnHdlr {
}
/* Diameter SWx SAR + SAA. */
private altstep as_DIA_SWx_SA_success() runs on EPDG_ConnHdlr {
private altstep as_DIA_SWx_SA_success(template (present) CxDx_3GPP_Server_Assignment_Type server_ass_type := ?) runs on EPDG_ConnHdlr {
var PDU_DIAMETER rx_dia;
var template (omit) AVP avp;
var octetstring sess_id;
@ -404,7 +404,28 @@ private function f_S6b_AA_success() runs on EPDG_ConnHdlr {
}
}
/* Diameter SWx SAR + SAA. */
/* Send STR as PGW to AAA server, expect back STA */
private function f_S6b_ST_success() runs on EPDG_ConnHdlr {
var PDU_DIAMETER rx_dia;
var UINT32 hbh_id := f_rnd_octstring(4);
var UINT32 ete_id := f_rnd_octstring(4);
/* 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.
*/
f_epdg_connhldr_S6b_expect_eteid(ete_id);
S6b.send(ts_DIA_S6b_STR(g_pars.imsi, DIAMETER_LOGOUT,
hbh_id := hbh_id, ete_id := ete_id));
alt {
[] S6b.receive(tr_DIA_S6b_STA(DIAMETER_SUCCESS)) -> value rx_dia {}
[] S6b.receive(PDU_DIAMETER:?) -> value rx_dia {
Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, log2str("Unexpected Diameter S6b msg rx: ", rx_dia));
}
}
}
/* ePDG Creates session at the PGW. PGW sends Diameter s6b AAR + AAA. */
private altstep as_GTP2C_CreateSession_success() runs on EPDG_ConnHdlr {
var PDU_GTPCv2 rx_msg;
var BearerContextIEs rx_bctx_ies;
@ -444,8 +465,27 @@ private altstep as_GTP2C_CreateSession_success() runs on EPDG_ConnHdlr {
Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, log2str("Unexpected GTP2C msg rx: ", rx_msg));
}
}
private function f_GTP2C_CreateSession_success() runs on EPDG_ConnHdlr {
as_GTP2C_CreateSession_success();
/* ePDG Deletes session at the PGW. PGW sends Diameter s6b AAR + AAA. */
private altstep as_GTP2C_DeleteSession_success() runs on EPDG_ConnHdlr {
var PDU_GTPCv2 rx_msg;
var BearerContextIEs rx_bctx_ies;
var template (value) FullyQualifiedTEID fteid_c_ie, fteid_u_ie;
var template (value) PDN_AddressAllocation paa;
var template (value) BearerContextIEs bctx_ies;
[] GTP2.receive(tr_GTP2C_DeleteSessionReq(g_pars.teic_local)) -> value rx_msg {
/* Upon rx of DeleteSession, emulate PGW requesting the AAA server for Sesssion Termination. */
f_S6b_ST_success();
GTP2.send(ts_GTP2C_DeleteSessionResp(g_pars.teic_remote,
rx_msg.sequenceNumber,
Request_accepted));
setverdict(pass);
}
[] GTP2.receive(PDU_GTPCv2:?) -> value rx_msg {
Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, log2str("Unexpected GTP2C msg rx: ", rx_msg));
}
}
/* Expect DeleteBearerResponse */
@ -493,7 +533,7 @@ private function f_GSUP_LU_success() runs on EPDG_ConnHdlr {
var GSUP_PDU rx_gsup;
var template octetstring destination_name := *;
GSUP.send(ts_GSUP_UL_REQ(g_pars.imsi));
as_DIA_SWx_SA_success();
as_DIA_SWx_SA_success(REGISTRATION);
/* Expect a positive response back to the translator */
alt {
[] GSUP.receive(tr_GSUP_UL_RES(g_pars.imsi, destination_name));
@ -508,7 +548,7 @@ private function f_GSUP_LU_success() runs on EPDG_ConnHdlr {
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();
as_GTP2C_CreateSession_success();
/* Expect a positive response back to the translator; */
var template (present) GSUP_IEs pdp_info := {
tr_GSUP_IE_PDP_CONTEXT_ID(?),
@ -526,10 +566,30 @@ private function f_GSUP_EPDGTunnel_success() runs on EPDG_ConnHdlr {
setverdict(pass);
}
/* GSUP Purge MS Req + Resp, triggers S2b DeleteSession Req + Response. */
private function f_GSUP_PurgeMS_success() runs on EPDG_ConnHdlr {
var GSUP_PDU rx_gsup;
GSUP.send(ts_GSUP_PURGE_MS_REQ(g_pars.imsi, OSMO_GSUP_CN_DOMAIN_PS));
as_GTP2C_DeleteSession_success();
/* ePDG internally sends STR to its AAA-Server. Since all sessions
become inactive, AAA-Server sends SAR(USER_DEREGISTRATION) to HSS: */
/* Expect a positive response back to the translator; */
as_DIA_SWx_SA_success(USER_DEREGISTRATION);
alt {
[] GSUP.receive(tr_GSUP_PURGE_MS_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();
f_GSUP_PurgeMS_success();
}
testcase TC_authinfo_normal() runs on MTC_CT {

9
library/DIAMETER_Templates.ttcn
View File

@ -307,6 +307,15 @@ template (present) GenericAVP tr_AVP_OriginStateId(template (present) OCTET4 sta
}
}
template (value) GenericAVP ts_AVP_TerminationCause(template (value) BASE_NONE_Termination_Cause tc) := {
avp := {
avp_header := ts_DIA_Hdr(c_AVP_Code_BASE_NONE_Termination_Cause),
avp_data := {
avp_BASE_NONE_Termination_Cause := tc
}
}
}
template (present) GenericAVP tr_AVP_TerminationCause(template (present) BASE_NONE_Termination_Cause tc) := {
avp := {
avp_header := tr_DIA_Hdr(c_AVP_Code_BASE_NONE_Termination_Cause),

51
library/DIAMETER_ts29_273_Templates.ttcn
View File

@ -257,4 +257,55 @@ tr_DIA_S6b_AAA(template (present) octetstring sess_id := ?,
tr_AVP_OriginRealm(orig_realm)
));
/* TS 29.273 9.2.2.3.1 Session-Termination-Request (STR) Command,
* Table 9.1.2.3.1/1: S6b Session Termination Request (STR), based on RFC 6733 8.4.1 */
template (value) PDU_DIAMETER
ts_DIA_S6b_STR(template (value) hexstring imsi,
template (value) BASE_NONE_Termination_Cause term_cause := DIAMETER_LOGOUT,
template (value) octetstring sess_id := c_def_sess_id,
template (value) charstring orig_host := "pgw.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 := '11000000'B,
cmd_code := Session_Termination,
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_AuthAppId(int2oct(c_DIAMETER_3GPP_S6b_AID, 4)),
ts_AVP_OriginHost(orig_host),
ts_AVP_OriginRealm(orig_realm),
ts_AVP_DestinationRealm(dest_realm),
ts_AVP_TerminationCause(term_cause),
ts_AVP_UserNameImsi(valueof(imsi))
/* Optional: OC-Supported-Features */
});
/* TS 29.273 9.2.2.3.2 Session-Termination-Answer (STA) Command,
* Table 9.1.2.3.1/2: S6b Session Termination Answer (STA), based on RFC 6733 8.4.2 */
template (present) PDU_DIAMETER
tr_DIA_S6b_STA(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 := Session_Termination,
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)
/* Lots other Optional */
));
}