pespin has uploaded this change for review. (
https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/37646?usp=email )
Change subject: sgsn: Introduce test TC_pmm_idle_rx_mt_data
......................................................................
sgsn: Introduce test TC_pmm_idle_rx_mt_data
Change-Id: I35d660b8e546f6ce0af8c05d7b5c56833a26fb76
---
M sgsn/BSSGP_ConnHdlr.ttcn
M sgsn/SGSN_Tests_Iu.ttcn
M sgsn/expected-results.xml
3 files changed, 75 insertions(+), 4 deletions(-)
git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks
refs/changes/46/37646/1
diff --git a/sgsn/BSSGP_ConnHdlr.ttcn b/sgsn/BSSGP_ConnHdlr.ttcn
index 7e44f4b..9019194 100644
--- a/sgsn/BSSGP_ConnHdlr.ttcn
+++ b/sgsn/BSSGP_ConnHdlr.ttcn
@@ -720,6 +720,7 @@
octetstring ggsn_ip_c, /* GGSN IP
Control */
octetstring ggsn_ip_u, /* GGSN IP User
*/
OCT1 ggsn_restart_ctr, /* GGSN Restart
Counter */
+ boolean direct_tunnel_requested, /* Did SGSN
request Direct Tunnel to the GGSN ?*/
OCT4 rnc_tei_u, /* SGSN TEI
User */
octetstring rnc_ip_u, /* SGSN IP USer
*/
@@ -788,6 +789,7 @@
apars.sgsn_ip_u := upd.sgsn_addr_traffic.addressf;
apars.sgsn_tei_u := upd.teidDataI.teidDataI;
}
+ apars.direct_tunnel_requested := dti;
}
altstep as_ggsn_gtp_ctx_upd_req(inout PdpActPars apars,
boolean send_recovery := false,
@@ -1025,6 +1027,7 @@
ggsn_ip_c := f_inet_addr(ggsn_ip),
ggsn_ip_u := f_inet_addr(ggsn_ip),
ggsn_restart_ctr := int2oct(2, 1),
+ direct_tunnel_requested := false,
rnc_tei_u := f_rnd_octstring(4),
rnc_ip_u := f_inet_addr(rnc_ip),
@@ -1047,9 +1050,18 @@
remPort := GTP1C_PORT
}
-function f_gtpu_send(inout PdpActPars apars, octetstring payload) runs on
BSSGP_ConnHdlr {
- var Gtp1uPeer peer := valueof(ts_GtpPeerU(apars.sgsn_ip_u));
- GTP[GTP_GGSN_IDX].send(ts_GTP1U_GPDU(peer, 0 /*seq*/, apars.sgsn_tei_u,
payload));
+/* Send data from GGSN to SGSN/RNC (depending on apars.f_ggsn_gtpu_send) */
+function f_ggsn_gtpu_send(inout PdpActPars apars, octetstring payload) runs on
BSSGP_ConnHdlr {
+ var Gtp1uPeer peer;
+ var OCT4 rem_teid;
+ if (apars.direct_tunnel_requested) {
+ peer := valueof(ts_GtpPeerU(apars.rnc_ip_u));
+ rem_teid := apars.rnc_tei_u;
+ } else {
+ peer := valueof(ts_GtpPeerU(apars.sgsn_ip_u));
+ rem_teid := apars.sgsn_tei_u;
+ }
+ GTP[GTP_GGSN_IDX].send(ts_GTP1U_GPDU(peer, 0 /*seq*/, rem_teid,
payload));
}
altstep as_xid(PdpActPars apars, integer ran_index := 0) runs on
BSSGP_ConnHdlr {
@@ -1096,7 +1108,7 @@
runs on BSSGP_ConnHdlr {
timer T := 5.0;
/* Send PDU via GTP from our simulated GGSN to the SGSN */
- f_gtpu_send(apars, payload);
+ f_ggsn_gtpu_send(apars, payload);
T.start;
alt {
diff --git a/sgsn/SGSN_Tests_Iu.ttcn b/sgsn/SGSN_Tests_Iu.ttcn
index ff68e0e..f3ffa45 100644
--- a/sgsn/SGSN_Tests_Iu.ttcn
+++ b/sgsn/SGSN_Tests_Iu.ttcn
@@ -12,6 +12,9 @@
import from RANAP_PDU_Descriptions all;
import from RANAP_IEs all;
+import from GTPv1U_Templates all;
+import from GTP_Emulation all;
+
import from BSSGP_ConnHdlr all;
private function f_init() runs on test_CT {
@@ -215,6 +218,51 @@
f_cleanup();
}
+/* Test UE going to PMM IDLE state after having activated the PDP context.
+ * SGSN is expected to update the GGSN cancelling the Direct Tunnel feature. */
+private function f_TC_pmm_idle_rx_mt_data(charstring id) runs on
BSSGP_ConnHdlr {
+ var PdpActPars apars := valueof(t_PdpActPars(mp_ggsn_ip,
mp_ranap_cfg[0].sctp_addr.local_ip_addr));
+
+ /* first perform regular attach */
+ f_gmm_attach(umts_aka_challenge := true, force_gsm_sres := false,
ran_index := 3);
+
+ f_service_request(apars, ran_index := 3);
+
+ f_pdp_ctx_act(apars, ran_index := 3);
+
+ f_iu_release_req(ts_RanapCause_radio_conn_release);
+ /* Now UE is in PMM IDLE state at the SGSN.
+ * Expect SGSN to point GTPU at GGSN back to itself: */
+ as_ggsn_gtp_ctx_upd_req(apars, exp_dir_tun := false, ran_index := 3);
+
+ /* Now GGSN receives new MT data and forwards it to SGSN: */
+ f_gtp_register_teid('00000000'O, GTP_GGSN_IDX); /* Ease debugging in
case SGSN sends ErrorInd */
+ f_ran_register_imsi(g_pars.imsi, g_pars.p_tmsi); /* Forward Paging
below to this component */
+ var octetstring payload := f_rnd_octstring(100);
+ f_ggsn_gtpu_send(apars, payload);
+
+ f_sleep(1.0);
+ BSSAP.receive(tr_RANAP_Paging(ps_domain, imsi_hex2oct(g_pars.imsi)));
+
+ /* Ue comes back, answering the paging:
+ * SGSN recreates the Iu ctx and recovers the Direct Tunnel RNC<->GGSN:
*/
+ f_service_request(apars, pdp_status := '2000'O /*NSAPI=5*/, ran_index
:= 3);
+ as_ranap_rab_ass_req(apars);
+ as_ggsn_gtp_ctx_upd_req(apars, exp_dir_tun := true, ran_index := 3);
+
+ /* Now UE is in PMM ENABLED state, tear it down to clean up: */
+ f_pdp_ctx_deact_mo(apars, '00'O, ran_index := 3);
+ setverdict(pass);
+}
+testcase TC_pmm_idle_rx_mt_data() runs on test_CT {
+ var BSSGP_ConnHdlr vc_conn;
+ f_init();
+ f_sleep(1.0);
+ vc_conn := f_start_handler(refers(f_TC_pmm_idle_rx_mt_data),
testcasename(), g_gb, 1001);
+ vc_conn.done;
+ f_cleanup();
+}
+
control {
execute( TC_iu_attach() );
execute( TC_iu_attach_encr() );
@@ -222,6 +270,7 @@
execute( TC_geran_attach_iu_rau() );
execute( TC_attach_pdp_act_user() );
execute( TC_attach_pdp_act_pmm_idle() );
+ execute( TC_pmm_idle_rx_mt_data() );
}
diff --git a/sgsn/expected-results.xml b/sgsn/expected-results.xml
index 7b38e99..3461721 100644
--- a/sgsn/expected-results.xml
+++ b/sgsn/expected-results.xml
@@ -95,6 +95,7 @@
<testcase classname='SGSN_Tests_Iu' name='TC_attach_pdp_act_user'
time='MASKED'/>
<testcase classname='SGSN_Tests_Iu' name='TC_attach_pdp_act_pmm_idle'
time='MASKED'/>
<testcase classname='SGSN_Tests_Iu'
name='TC_attach_pdp_act_pmm_idle_lost_pdp_status' time='MASKED'/>
+ <testcase classname='SGSN_Tests_Iu' name='TC_pmm_idle_rx_mt_data'
time='MASKED'/>
<!-- SGSN_Tests_NS (handle_sns == true) testcases start here -->
<testcase classname='SGSN_Tests_NS' name='TC_SNS_size' time='MASKED'/>
<testcase classname='SGSN_Tests_NS' name='TC_SNS_size_too_big'
time='MASKED'/>
--
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Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-Change-Id: I35d660b8e546f6ce0af8c05d7b5c56833a26fb76
Gerrit-Change-Number: 37646
Gerrit-PatchSet: 1
Gerrit-Owner: pespin <[email protected]>
Gerrit-MessageType: newchange
