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osmo-ttcn3-hacks
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sgsn: Introduce test TC_attach_echo_timeout 

This test verifies sgsn drops all GGSN related pdp context when that
GGSN stops answering echo requests.

Change-Id: Ic31748924e7bf05ea2ccf2b1be0c460eefed5782
This commit is contained in:
Pau Espin 2019-08-28 17:33:46 +02:00
parent fa1ca02d34
commit fcec914a8e
2 changed files with 63 additions and 1 deletions
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63
sgsn/SGSN_Tests.ttcn
View File

@ -61,6 +61,7 @@ modulepar {
charstring mp_hlr_ip := "127.0.0.1";
integer mp_hlr_port := 4222;
charstring mp_ggsn_ip := "127.0.0.2";
integer mp_echo_interval := 5; /* in seconds. Only used in test enabling g_use_echo */
NSConfigurations mp_nsconfig := {
{
@ -259,7 +260,7 @@ private function f_init_vty() runs on test_CT {
private function f_vty_enable_echo_interval(boolean enable) runs on test_CT {
if (enable) {
f_vty_config(SGSNVTY, "sgsn", "ggsn 0 echo-interval 5");
f_vty_config(SGSNVTY, "sgsn", "ggsn 0 echo-interval " & int2str(mp_echo_interval));
} else {
f_vty_config(SGSNVTY, "sgsn", "ggsn 0 no echo-interval");
}
@ -1539,6 +1540,65 @@ testcase TC_attach_second_attempt() runs on test_CT {
vc_conn.done;
}
private function f_TC_attach_echo_timeout(charstring id) runs on BSSGP_ConnHdlr {
var Gtp1cUnitdata g_ud;
var PdpActPars apars := valueof(t_PdpActPars(mp_ggsn_ip));
var integer seq_nr;
/* first perform regular attach */
f_TC_attach(id);
/* then activate PDP context */
f_pdp_ctx_act(apars);
/* Wait to receive first echo request and send initial Restart counter */
GTP.receive(tr_GTPC_MsgType(?, echoRequest, ?)) -> value g_ud {
BSSGP[0].clear;
seq_nr := oct2int(g_ud.gtpc.opt_part.sequenceNumber);
GTP.send(ts_GTPC_PONG(g_ud.peer, seq_nr, apars.ggsn_restart_ctr));
f_sleep(int2float(mp_echo_interval)); /* wait until around next echo is expected */
}
/* At some point next echo request not answered will timeout and SGSN
should drop the pdp ctx. Around T3 (3secs) * 6 (+ extra, a lot due to OS#4178): */
timer T := 3.0 * 6.0 + 16.0;
T.start;
alt {
[] BSSGP[0].receive(tr_SM_DEACT_PDP_REQ_MT(apars.tid, ?, true)) {
f_send_l3_gmm_llc(ts_SM_DEACT_PDP_ACCEPT_MO(apars.tid));
setverdict(pass);
}
[] GTP.receive(tr_GTPC_MsgType(?, deletePDPContextRequest, apars.ggsn_tei_c)) -> value g_ud {
/* SGSN currently doesn't send this message because it expects GGSN to be non-reachable anyway */
seq_nr := oct2int(g_ud.gtpc.opt_part.sequenceNumber);
log("Received deletePDPContextRequest seq_nr=" & int2str(seq_nr));
GTP.send(ts_GTPC_DeletePdpResp(g_ud.peer, seq_nr, apars.sgsn_tei_c, '7F'O));
repeat;
}
[] GTP.receive(tr_GTPC_MsgType(?, echoRequest, ?)) -> value g_ud {
seq_nr := oct2int(g_ud.gtpc.opt_part.sequenceNumber);
log("Received EchoRequest seq_nr=" & int2str(seq_nr));
repeat;
}
[] T.timeout {
setverdict(fail, "BSSGP DeactPdpReq not received");
mtc.stop;
}
[] as_xid(apars);
}
T.stop
setverdict(pass);
}
/* ATTACH + trigger Recovery procedure through CreatePdpResp */
testcase TC_attach_echo_timeout() runs on test_CT {
var BSSGP_ConnHdlr vc_conn;
g_use_echo := true;
f_init();
vc_conn := f_start_handler(refers(f_TC_attach_echo_timeout), testcasename(), g_gb, 67, 50.0);
vc_conn.done;
g_use_echo := false;
}
private function f_TC_attach_restart_ctr_echo(charstring id) runs on BSSGP_ConnHdlr {
var Gtp1cUnitdata g_ud;
var PdpActPars apars := valueof(t_PdpActPars(mp_ggsn_ip));
@ -2597,6 +2657,7 @@ control {
execute( TC_attach_pdp_act_user_deact_mt() );
execute( TC_attach_pdp_act_deact_dup() );
execute( TC_attach_second_attempt() );
execute( TC_attach_echo_timeout() );
execute( TC_attach_restart_ctr_echo() );
execute( TC_attach_restart_ctr_create() );
execute( TC_attach_pdp_act_deact_mt_t3395_expire() );

1
sgsn/expected-results.xml
View File

@ -54,6 +54,7 @@
SGSN_Tests.ttcn:MASKED TC_attach_second_attempt testcase
</failure>
</testcase>
<testcase classname='SGSN_Tests' name='TC_attach_echo_timeout' time='MASKED'/>
<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'/>