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sgsn: Add series of tests on suspend/resume and paging behavior 

Let's test whether paging is triggered after T3314 expiration, as well
as suspend and explicit and implicit resume work as expected

Change-Id: I83b7a453958e30dfc727ba3140168217c209833f
Related: OS#4616
This commit is contained in:
Harald Welte 2020-06-17 22:12:54 +02:00
parent a5c71cdefe
commit 8e5932e563
1 changed files with 163 additions and 0 deletions
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163
sgsn/SGSN_Tests.ttcn
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@ -2907,6 +2907,164 @@ testcase TC_attach_req_id_req_ra_update() runs on test_CT {
f_cleanup();
}
private altstep as_nopaging_ps(integer ran_idx := 0) runs on BSSGP_ConnHdlr {
var PDU_BSSGP rx;
[] BSSGP_SIG[ran_idx].receive(tr_BSSGP_PS_PAGING(?)) -> value rx {
setverdict(fail, "Received unexpected PS PAGING: ", rx);
mtc.stop;
}
}
/* SUSPEND, then DL traffic: should not pass + no paging expected */
private function f_TC_suspend_nopaging(charstring id) runs on BSSGP_ConnHdlr {
var PdpActPars apars := valueof(t_PdpActPars(mp_ggsn_ip));
var default d;
/* first perform regular attach */
f_TC_attach(id);
/* then activate PDP context */
f_pdp_ctx_act(apars);
/* then transceive a downlink PDU */
f_gtpu_xceive_mt(apars, f_rnd_octstring(100));
/* now suspend GPRS */
f_bssgp_suspend();
d := activate(as_nopaging_ps());
/* at this point we don't expect any downlink traffic at all, neither actual LLC/SNDCP data,
* nor any related paging requests */
f_gtpu_xceive_mt(apars, f_rnd_octstring(100), expect_fwd := false);
deactivate(d);
}
testcase TC_suspend_nopaging() runs on test_CT {
var BSSGP_ConnHdlr vc_conn;
f_init();
f_sleep(1.0);
vc_conn := f_start_handler(refers(f_TC_suspend_nopaging), testcasename(), g_gb, 48);
vc_conn.done;
f_cleanup();
}
/* SUSPEND, then RESUME: data expected to flow after explicit resume */
private function f_TC_suspend_resume(charstring id) runs on BSSGP_ConnHdlr {
var PdpActPars apars := valueof(t_PdpActPars(mp_ggsn_ip));
var OCT1 susp_ref;
var default d;
/* first perform regular attach */
f_TC_attach(id);
/* then activate PDP context */
f_pdp_ctx_act(apars);
/* then transceive a downlink PDU */
f_gtpu_xceive_mt(apars, f_rnd_octstring(100));
/* now suspend GPRS */
susp_ref := f_bssgp_suspend();
d := activate(as_nopaging_ps());
/* at this point we don't expect any downlink traffic at all, neither actual LLC/SNDCP data,
* nor any related paging requests */
f_gtpu_xceive_mt(apars, f_rnd_octstring(100), expect_fwd := false);
deactivate(d);
/* resume GPRS */
f_bssgp_resume(susp_ref);
/* now data should be flowing again */
f_gtpu_xceive_mt(apars, f_rnd_octstring(100));
}
testcase TC_suspend_resume() runs on test_CT {
var BSSGP_ConnHdlr vc_conn;
f_init();
f_sleep(1.0);
vc_conn := f_start_handler(refers(f_TC_suspend_resume), testcasename(), g_gb, 49);
vc_conn.done;
f_cleanup();
}
/* SUSPEND, then RAU: data expected to flow after implicit resume */
private function f_TC_suspend_rau(charstring id) runs on BSSGP_ConnHdlr {
var PdpActPars apars := valueof(t_PdpActPars(mp_ggsn_ip));
var default d;
/* first perform regular attach */
f_TC_attach(id);
/* then activate PDP context */
f_pdp_ctx_act(apars);
/* then transceive a downlink PDU */
f_gtpu_xceive_mt(apars, f_rnd_octstring(100));
/* now suspend GPRS */
f_bssgp_suspend();
d := activate(as_nopaging_ps());
/* at this point we don't expect any downlink traffic at all, neither actual LLC/SNDCP data,
* nor any related paging requests */
f_gtpu_xceive_mt(apars, f_rnd_octstring(100), expect_fwd := false);
deactivate(d);
/* perform RAU (implicit RESUME) */
f_routing_area_update(g_pars.ra);
/* now data should be flowing again */
f_gtpu_xceive_mt(apars, f_rnd_octstring(100));
}
testcase TC_suspend_rau() runs on test_CT {
var BSSGP_ConnHdlr vc_conn;
f_init();
f_sleep(1.0);
vc_conn := f_start_handler(refers(f_TC_suspend_rau), testcasename(), g_gb, 50);
vc_conn.done;
f_cleanup();
}
/* wait for T3314 expiration and check that PS PAGING is created on DL PDU */
private function f_TC_paging_ps(charstring id) runs on BSSGP_ConnHdlr {
var PdpActPars apars := valueof(t_PdpActPars(mp_ggsn_ip));
var default d;
/* first perform regular attach */
f_TC_attach(id);
/* then activate PDP context */
f_pdp_ctx_act(apars);
/* then transceive a downlink PDU */
f_gtpu_xceive_mt(apars, f_rnd_octstring(100));
/* now wait for T3314 expiration (test_CT below has reduced it to 3s) */
f_sleep(5.0);
/* now data should be flowing again, but with PS PAGING */
f_gtpu_xceive_mt(apars, f_rnd_octstring(100));
BSSGP_SIG[0].receive(tr_BSSGP_PS_PAGING(?));
/* FIXME: simulate paging response */
/* FIXME: verify PDU actually arrives only after paging response was successful */
}
testcase TC_paging_ps() runs on test_CT {
var BSSGP_ConnHdlr vc_conn;
f_init();
f_vty_config(SGSNVTY, "sgsn", "timer 3314 3");
f_sleep(1.0);
vc_conn := f_start_handler(refers(f_TC_paging_ps), testcasename(), g_gb, 51);
vc_conn.done;
f_vty_config(SGSNVTY, "sgsn", "timer 3314 default");
f_cleanup();
}
control {
execute( TC_attach() );
execute( TC_attach_mnc3() );
@ -2964,6 +3122,11 @@ control {
execute( TC_llc_sabm_dm_llgmm() );
execute( TC_llc_sabm_dm_ll5() );
execute( TC_suspend_nopaging() );
execute( TC_suspend_resume() );
execute( TC_suspend_rau() );
execute( TC_paging_ps() );
/* At the end, may crash osmo-sgsn, see OS#3957, OS#4245 */
execute( TC_attach_req_id_req_ra_update() );
}