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osmo-ttcn3-hacks
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sgsn: Add tests to check GTP retransmit queue 

Change-Id: I3c4a3573482bb1fa1549c732a0f78c2d00eadd86
This commit is contained in:
Pau Espin 2019-05-29 13:02:42 +02:00 committed by Harald Welte
parent f8034480a0
commit e6f071fe57
2 changed files with 121 additions and 0 deletions
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119
sgsn/SGSN_Tests.ttcn
View File

@ -1536,6 +1536,123 @@ testcase TC_attach_pdp_act_deact_mt_t3395_expire() runs on test_CT {
vc_conn.done;
}
/* ATTACH + PDP CTX ACT dropped + retrans */
private function f_TC_attach_pdp_act_deact_gtp_retrans(charstring id) runs on BSSGP_ConnHdlr {
var PdpActPars apars := valueof(t_PdpActPars(mp_ggsn_ip));
var Gtp1cUnitdata g_ud_first, g_ud_second;
/* first perform regular attach */
f_TC_attach(id);
/* then activate PDP context on the Gb side */
f_send_l3_gmm_llc(ts_SM_ACT_PDP_REQ(apars.tid, apars.nsapi, apars.sapi, apars.qos, apars.addr,
apars.apn, apars.pco), 0);
GTP.receive(tr_GTPC_MsgType(?, createPDPContextRequest, ?)) -> value g_ud_first {}
log("First createPDPContextRequest received, dropping & waiting for retransmission");
GTP.receive(tr_GTPC_MsgType(?, createPDPContextRequest, ?)) -> value g_ud_second {
if (g_ud_first != g_ud_second) {
setverdict(fail, "Retransmitted GTP message createPDPContextRequest is different from original one!");
mtc.stop;
}
f_process_gtp_ctx_act_req(apars, g_ud_second.gtpc);
var integer seq_nr := oct2int(g_ud_second.gtpc.opt_part.sequenceNumber);
GTP.send(ts_GTPC_CreatePdpResp(g_ud_second.peer, seq_nr,
apars.sgsn_tei_c, apars.gtp_resp_cause,
apars.ggsn_tei_c, apars.ggsn_tei_u,
apars.nsapi,
apars.ggsn_ip_c, apars.ggsn_ip_u, apars.chg_id,
omit, omit));
}
BSSGP[0].receive(tr_BD_L3_MT(tr_SM_ACT_PDP_ACCEPT)) {}
/* Now the same with Deact */
f_send_l3_gmm_llc(ts_SM_DEACT_PDP_REQ_MO(apars.tid, '00'O, false, omit), 0);
GTP.receive(tr_GTPC_MsgType(?, deletePDPContextRequest, apars.ggsn_tei_c)) -> value g_ud_first {}
log("First deletePDPContextRequest received, dropping & waiting for retransmission");
GTP.receive(tr_GTPC_MsgType(?, deletePDPContextRequest, apars.ggsn_tei_c)) -> value g_ud_second {
if (g_ud_first != g_ud_second) {
setverdict(fail, "Retransmitted GTP message deletePDPContextRequest is different from original one!");
mtc.stop;
}
var integer seq_nr := oct2int(g_ud_second.gtpc.opt_part.sequenceNumber);
BSSGP[0].clear;
GTP.send(ts_GTPC_DeletePdpResp(g_ud_second.peer, seq_nr, apars.sgsn_tei_c, '7F'O));
}
alt {
[] BSSGP[0].receive(tr_BD_L3_MT(tr_SM_DEACT_PDP_ACCEPT_MT(apars.tid))) {
setverdict(pass);
}
[] as_xid(apars, 0);
}
setverdict(pass);
}
testcase TC_attach_pdp_act_deact_gtp_retrans() runs on test_CT {
var BSSGP_ConnHdlr vc_conn;
f_init();
vc_conn := f_start_handler(refers(f_TC_attach_pdp_act_deact_gtp_retrans), testcasename(), g_gb, 27);
vc_conn.done;
}
/* Test that SGSN GTP response retransmit queue works fine */
private function f_TC_attach_pdp_act_deact_gtp_retrans_resp(charstring id) runs on BSSGP_ConnHdlr {
var PdpActPars apars := valueof(t_PdpActPars(mp_ggsn_ip));
var integer seq_nr := 23;
var Gtp1cUnitdata g_ud_first, g_ud_second;
var template Gtp1cUnitdata g_delete_req;
/* first perform regular attach + PDP context act */
f_TC_attach(id);
f_pdp_ctx_act(apars);
/* Now perform an MT DeleteCtxReq and emulate GGSN didn't receive response and sends a duplicated DeleteCtxReq */
BSSGP[0].clear;
var GtpPeer peer := valueof(ts_GtpPeerC(apars.sgsn_ip_c));
g_delete_req := ts_GTPC_DeletePDP(peer, seq_nr, apars.sgsn_tei_c, apars.nsapi, '1'B);
GTP.send(g_delete_req);
alt {
[] BSSGP[0].receive(tr_BD_L3_MT(tr_SM_DEACT_PDP_REQ_MT(apars.tid, ?, true))) {
f_send_l3_gmm_llc(ts_SM_DEACT_PDP_ACCEPT_MO(apars.tid), 0);
}
[] as_xid(apars, 0);
}
GTP.receive(tr_GTPC_MsgType(?, deletePDPContextResponse, apars.ggsn_tei_c)) -> value g_ud_first {
if (g_ud_first.gtpc.gtpc_pdu.deletePDPContextResponse.cause.causevalue != '80'O) {
setverdict(fail, "Received deletePDPContextResponse cause is not 'Request accepted'");
mtc.stop;
}
};
/* Send duplicate DeleteCtxReq */
log("First deletePDPContextResponse received, dropping & retransmitting retransmission of deletePDPContextRequest");
GTP.send(g_delete_req);
GTP.receive(tr_GTPC_MsgType(?, deletePDPContextResponse, apars.ggsn_tei_c)) -> value g_ud_second {
if (g_ud_first != g_ud_second) {
setverdict(fail, "Retransmitted GTP message deletePDPContextResponse is different from original one!");
mtc.stop;
}
}
/* Let's send now a new DeleteCtxReq (increased seq_nr) to make sure it
* is handled differently by SGSN (expect "non-existent" cause) */
g_delete_req := ts_GTPC_DeletePDP(peer, seq_nr + 1, apars.sgsn_tei_c, apars.nsapi, '1'B);
GTP.send(g_delete_req);
/* Response with cause "non-existent" must be sent with TEID 0 according to specs */
GTP.receive(tr_GTPC_MsgType(?, deletePDPContextResponse, '00000000'O)) -> value g_ud_second {
if (g_ud_second.gtpc.gtpc_pdu.deletePDPContextResponse.cause.causevalue != 'C0'O) {
setverdict(fail, "Received deletePDPContextResponse cause is not 'Non-existent'");
mtc.stop;
}
}
setverdict(pass);
}
testcase TC_attach_pdp_act_deact_gtp_retrans_resp() runs on test_CT {
var BSSGP_ConnHdlr vc_conn;
f_init();
vc_conn := f_start_handler(refers(f_TC_attach_pdp_act_deact_gtp_retrans_resp), testcasename(), g_gb, 28);
vc_conn.done;
}
private function f_TC_hlr_location_cancel_request_update(charstring id) runs on BSSGP_ConnHdlr {
/* MS: perform regular attach */
f_TC_attach(id);
@ -2369,6 +2486,8 @@ control {
execute( TC_attach_restart_ctr_echo() );
execute( TC_attach_restart_ctr_create() );
execute( TC_attach_pdp_act_deact_mt_t3395_expire() );
execute( TC_attach_pdp_act_deact_gtp_retrans() );
execute( TC_attach_pdp_act_deact_gtp_retrans_resp() );
execute( TC_attach_pdp_act_user_error_ind_ggsn() );
execute( TC_attach_pdp_act_gmm_detach() );
execute( TC_attach_gmm_attach_req_while_gmm_attach() );

2
sgsn/expected-results.xml
View File

@ -56,6 +56,8 @@
<testcase classname='SGSN_Tests' name='TC_attach_restart_ctr_echo' time='MASKED'/>
<testcase classname='SGSN_Tests' name='TC_attach_restart_ctr_create' time='MASKED'/>
<testcase classname='SGSN_Tests' name='TC_attach_pdp_act_deact_mt_t3395_expire' time='MASKED'/>
<testcase classname='SGSN_Tests' name='TC_attach_pdp_act_deact_gtp_retrans' time='MASKED'/>
<testcase classname='SGSN_Tests' name='TC_attach_pdp_act_deact_gtp_retrans_resp' time='MASKED'/>
<testcase classname='SGSN_Tests' name='TC_attach_pdp_act_user_error_ind_ggsn' time='MASKED'/>
<testcase classname='SGSN_Tests' name='TC_attach_gmm_attach_req_while_gmm_attach' time='MASKED'/>
</testsuite>