pespin has submitted this change and it was merged. (
https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/15306 )
Change subject: sgsn: Introduce test TC_attach_echo_timeout
......................................................................
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
---
M sgsn/SGSN_Tests.ttcn
M sgsn/expected-results.xml
2 files changed, 63 insertions(+), 1 deletion(-)
Approvals:
Jenkins Builder: Verified
neels: Looks good to me, but someone else must approve
laforge: Looks good to me, approved
diff --git a/sgsn/SGSN_Tests.ttcn b/sgsn/SGSN_Tests.ttcn
index b146046..db7d54b 100644
--- a/sgsn/SGSN_Tests.ttcn
+++ b/sgsn/SGSN_Tests.ttcn
@@ -61,6 +61,7 @@
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_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 @@
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 @@
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() );
diff --git a/sgsn/expected-results.xml b/sgsn/expected-results.xml
index d9c3706..fc8856a 100644
--- a/sgsn/expected-results.xml
+++ b/sgsn/expected-results.xml
@@ -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'/>
--
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Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-Change-Id: Ic31748924e7bf05ea2ccf2b1be0c460eefed5782
Gerrit-Change-Number: 15306
Gerrit-PatchSet: 1
Gerrit-Owner: pespin <pes...@sysmocom.de>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: laforge <lafo...@gnumonks.org>
Gerrit-Reviewer: neels <nhofm...@sysmocom.de>
Gerrit-Reviewer: pespin <pes...@sysmocom.de>
Gerrit-MessageType: merged
