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authorNeels Hofmeyr <neels@hofmeyr.de>2020-06-04 15:25:10 +0200
committerlaforge <laforge@osmocom.org>2020-06-18 11:54:47 +0000
commit4f11841173c929ecf5113622706eea3818ee5529 (patch)
tree255f4a664f733e23740adb0caf71bff3115caf85
parent8e5932e5631927863adff328acce84665a5ece78 (diff)
bsc: add MSC pooling tests
The MSC pooling feature is implemented in osmo-bsc Ifbdea197b26e88751a391c8a80c41f04e7d5e047. A VTY command ('mscpool roundrobin next') that allows deterministic testing is added in I2155d906505a26744966f442ffb1e87a6a9b494c. osmo-bsc.cfg changes needed for these tests to succeed are in docker-playground I1986e4ef43beee161c82193694421b56136c1afe The new tests will fail until the above have been merged. Change-Id: I21cbab193cd0de2e5692665442eae113d5f61904
-rw-r--r--bsc/BSC_Tests.ttcn653
-rw-r--r--bsc/MSC_ConnectionHandler.ttcn14
-rw-r--r--library/L3_Templates.ttcn72
3 files changed, 736 insertions, 3 deletions
diff --git a/bsc/BSC_Tests.ttcn b/bsc/BSC_Tests.ttcn
index 364254c..377b193 100644
--- a/bsc/BSC_Tests.ttcn
+++ b/bsc/BSC_Tests.ttcn
@@ -20,6 +20,7 @@ module BSC_Tests {
* level testing.
*/
+import from Misc_Helpers all;
import from General_Types all;
import from Osmocom_Types all;
import from GSM_Types all;
@@ -369,6 +370,14 @@ function f_init_vty(charstring id := "foo") runs on test_CT {
"sccp-timer iar " & int2str(g_bsc_sccp_timer_iar)});
}
+private function f_logp(charstring log_msg) runs on MSC_ConnHdlr
+{
+ // log on TTCN3 log output
+ log(log_msg);
+ // log in stderr log
+ f_vty_transceive(BSCVTY, "logp lglobal notice " & log_msg);
+}
+
/* global initialization function
* \param nr_bts Number of BTSs we should start/bring up
* \param handler_mode Start an RSL_Emulation_CT component (true) or not (false).
@@ -4445,6 +4454,628 @@ testcase TC_assignment_verify_ms_power_params_ie() runs on test_CT {
vc_conn.done;
}
+/***********************************************************************
+ * MSC Pooling
+ ***********************************************************************/
+
+function f_tmsi_nri(integer nri_v, octetstring base_tmsi := '42000023'O, integer nri_bitlen := 10) return octetstring
+{
+ return int2oct( oct2int(base_tmsi) + bit2int( (int2bit(nri_v, 32) << ( 24 - nri_bitlen)) ),
+ 4);
+}
+
+template MobileIdentityLV ts_MI_TMSI_NRI_LV(integer nri_v, integer nri_bitlen := 10) :=
+ ts_MI_TMSI_LV(tmsi := f_tmsi_nri(nri_v, nri_bitlen := nri_bitlen));
+
+private function f_perform_clear(RSL_DCHAN_PT rsl) runs on MSC_ConnHdlr {
+ f_logp("MSC instructs BSC to clear channel");
+ BSSAP.send(ts_BSSMAP_ClearCommand(0));
+ interleave {
+ [] rsl.receive(tr_RSL_DATA_REQ(g_chan_nr, ?, decmatch tr_RRM_RR_RELEASE)) {
+ f_logp("Got RSL RR Release");
+ }
+ [] rsl.receive(tr_RSL_DEACT_SACCH(g_chan_nr)) {
+ f_logp("Got RSL Deact SACCH");
+ }
+ [] BSSAP.receive(tr_BSSMAP_ClearComplete) {
+ f_logp("Got BSSMAP Clear Complete");
+ /* Also drop the SCCP connection */
+ BSSAP.send(RAN_Conn_Prim:MSC_CONN_PRIM_DISC_REQ);
+ }
+ [] rsl.receive(tr_RSL_MsgTypeD(RSL_MT_RF_CHAN_REL)) {
+ f_logp("Got RSL RF Chan Rel, sending Rel Ack");
+ rsl.send(ts_RSL_RF_CHAN_REL_ACK(g_chan_nr));
+ }
+ }
+}
+
+private function f_perform_compl_l3(RSL_DCHAN_PT rsl, template PDU_ML3_MS_NW l3_info, boolean do_clear := true)
+runs on MSC_ConnHdlr {
+ timer T := 10.0;
+ var octetstring l3_enc := enc_PDU_ML3_MS_NW(valueof(l3_info));
+
+ f_logp("establish channel, send Complete Layer 3 Info");
+ f_create_bssmap_exp(l3_enc);
+
+ /* RSL_Emulation.f_chan_est() on rsl:
+ * This is basically code dup with s/RSL/rsl from:
+ * RSL_Emulation.f_chan_est(g_pars.ra, l3_enc, g_pars.link_id, g_pars.fn);
+ */
+ var RSL_Message rx_rsl;
+ var GsmRrMessage rr;
+
+ /* request a channel to be established */
+ rsl.send(ts_RSLDC_ChanRqd(g_pars.ra, g_pars.fn));
+ /* expect immediate assignment.
+ * Code dup with s/RSL/rsl from:
+ * rx_rsl := f_rx_or_fail(tr_RSL_IMM_ASSIGN);
+ */
+ timer Tt := 10.0;
+
+ /* request a channel to be established */
+ Tt.start;
+ alt {
+ [] rsl.receive(tr_RSL_IMM_ASSIGN) -> value rx_rsl {
+ Tt.stop;
+ }
+ [] rsl.receive {
+ setverdict(fail, "Unexpected RSL message on DCHAN");
+ mtc.stop;
+ }
+ [] Tt.timeout {
+ setverdict(fail, "Timeout waiting for RSL on DCHAN");
+ mtc.stop;
+ }
+ }
+ rr := dec_GsmRrMessage(rx_rsl.ies[1].body.full_imm_ass_info.payload);
+ g_chan_nr := rr.payload.imm_ass.chan_desc.chan_nr;
+ rsl.send(ts_RSL_EST_IND(g_chan_nr, valueof(g_pars.link_id), l3_enc));
+
+
+ f_logp("expect BSSAP Complete Layer 3 Info at MSC");
+ var template PDU_BSSAP exp_l3_compl;
+ exp_l3_compl := tr_BSSMAP_ComplL3()
+ if (g_pars.aoip == false) {
+ exp_l3_compl.pdu.bssmap.completeLayer3Information.codecList := omit;
+ } else {
+ exp_l3_compl.pdu.bssmap.completeLayer3Information.codecList := ?;
+ }
+
+ var PDU_BSSAP bssap;
+ T.start;
+ alt {
+ [] BSSAP.receive(exp_l3_compl) -> value bssap {
+ f_logp("received expected Complete Layer 3 Info at MSC");
+ log("rx exp_l3_compl = ", bssap);
+ }
+ [] BSSAP.receive(tr_BSSMAP_ComplL3) {
+ Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, "Received non-matching COMPLETE LAYER 3 INFORMATION");
+ }
+ [] T.timeout {
+ Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, "Timeout waiting for COMPLETE LAYER 3 INFORMATION");
+ }
+ }
+
+ /* start ciphering, if requested */
+ if (ispresent(g_pars.encr)) {
+ f_logp("start ciphering");
+ f_cipher_mode(g_pars.encr.enc_alg, g_pars.encr.enc_key);
+ }
+
+ if (do_clear) {
+ f_perform_clear(rsl);
+ }
+ setverdict(pass);
+ f_sleep(1.0);
+}
+
+private function f_tc_mscpool_compl_l3(charstring id) runs on MSC_ConnHdlr {
+ f_MscConnHdlr_init(g_pars.media_nr, "127.0.0.2", "127.0.0.3", FR_AMR);
+ if (g_pars.mscpool.rsl_idx == 0) {
+ f_perform_compl_l3(RSL, g_pars.mscpool.l3_info);
+ } else if (g_pars.mscpool.rsl_idx == 1) {
+ f_perform_compl_l3(RSL1, g_pars.mscpool.l3_info);
+ } else if (g_pars.mscpool.rsl_idx == 2) {
+ f_perform_compl_l3(RSL2, g_pars.mscpool.l3_info);
+ }
+}
+
+/* Various Complete Layer 3 by IMSI all end up with the first MSC, because the other MSCs are not connected. */
+private function f_tc_mscpool_L3Compl_on_1_msc(charstring id) runs on MSC_ConnHdlr {
+ f_MscConnHdlr_init(g_pars.media_nr, "127.0.0.2", "127.0.0.3", FR_AMR);
+ f_perform_compl_l3(RSL, ts_LU_REQ(LU_Type_IMSI_Attach, valueof(ts_MI_IMSI_LV('001010000000001'H)), '00F110'O) );
+ f_perform_compl_l3(RSL, ts_CM_SERV_REQ(CM_TYPE_MO_SMS, valueof(ts_MI_IMSI_LV('001010000000002'H))) );
+ f_perform_compl_l3(RSL, ts_PAG_RESP(valueof(ts_MI_IMSI_LV('001010000000003'H))) );
+ f_perform_compl_l3(RSL, ts_ML3_MO_MM_IMSI_DET_Ind(valueof(ts_MI_IMSI_LV('001010000000004'H))) );
+}
+testcase TC_mscpool_L3Compl_on_1_msc() runs on test_CT {
+
+ f_init(1, true);
+ f_sleep(1.0);
+ var MSC_ConnHdlr vc_conn;
+ var TestHdlrParams pars := f_gen_test_hdlr_pars();
+ vc_conn := f_start_handler(refers(f_tc_mscpool_L3Compl_on_1_msc), pars);
+ vc_conn.done;
+}
+
+/* Three Layer 3 Complete by IMSI are round-robin'ed across two connected MSCs */
+/* FIXME: each run is using a separate RSLem: RSL, RSL1, RSL2. It should work
+ * just as well using only RSL. */
+testcase TC_mscpool_L3Complete_by_imsi_round_robin() runs on test_CT {
+
+ f_init(nr_bts := 3, handler_mode := true, nr_msc := 2);
+ f_sleep(1.0);
+
+ /* Control which MSC gets chosen next by the round-robin, otherwise
+ * would be randomly affected by which other tests ran before this. */
+ f_vty_transceive(BSCVTY, "mscpool roundrobin next 0");
+
+ var MSC_ConnHdlr vc_conn1;
+ var TestHdlrParams pars1 := f_gen_test_hdlr_pars(bssap_idx := 0);
+ pars1.mscpool.rsl_idx := 0;
+ pars1.mscpool.l3_info := valueof(ts_LU_REQ(LU_Type_IMSI_Attach, valueof(ts_MI_IMSI_LV('001010000000001'H)), '00F110'O));
+ vc_conn1 := f_start_handler(refers(f_tc_mscpool_compl_l3), pars1);
+ vc_conn1.done;
+
+ var MSC_ConnHdlr vc_conn2;
+ var TestHdlrParams pars2 := f_gen_test_hdlr_pars(bssap_idx := 1);
+ pars2.mscpool.rsl_idx := 1;
+ pars2.mscpool.l3_info := valueof(ts_CM_SERV_REQ(CM_TYPE_MO_CALL, valueof(ts_MI_IMSI_LV('001010000000002'H))));
+ vc_conn2 := f_start_handler(refers(f_tc_mscpool_compl_l3), pars2);
+ vc_conn2.done;
+
+ /* Test round-robin wrap to the first MSC */
+ var MSC_ConnHdlr vc_conn3;
+ var TestHdlrParams pars3 := f_gen_test_hdlr_pars(bssap_idx := 0);
+ pars3.mscpool.rsl_idx := 2;
+ pars3.mscpool.l3_info := valueof(ts_PAG_RESP(valueof(ts_MI_IMSI_LV('001010000000003'H))));
+ vc_conn3 := f_start_handler(refers(f_tc_mscpool_compl_l3), pars3);
+ vc_conn3.done;
+}
+
+/* Three LU by TMSI are round-robin'ed across two connected MSCs, because they contain the NULL-NRI 0
+ * (configured in osmo-bsc.cfg). */
+/* FIXME: each run is using a separate RSLem: RSL, RSL1, RSL2. It should work
+ * just as well using only RSL. */
+testcase TC_mscpool_LU_by_tmsi_null_nri_0_round_robin() runs on test_CT {
+
+ f_init(nr_bts := 3, handler_mode := true, nr_msc := 2);
+ f_sleep(1.0);
+
+ /* Control which MSC gets chosen next by the round-robin, otherwise
+ * would be randomly affected by which other tests ran before this. */
+ f_vty_transceive(BSCVTY, "mscpool roundrobin next 0");
+
+ var MSC_ConnHdlr vc_conn1;
+ var TestHdlrParams pars1 := f_gen_test_hdlr_pars(bssap_idx := 0);
+ pars1.mscpool.rsl_idx := 0;
+ pars1.mscpool.l3_info := valueof(ts_LU_REQ(LU_Type_IMSI_Attach, valueof(ts_MI_TMSI_NRI_LV(0)), '00F110'O));
+ vc_conn1 := f_start_handler(refers(f_tc_mscpool_compl_l3), pars1);
+ vc_conn1.done;
+
+ var MSC_ConnHdlr vc_conn2;
+ var TestHdlrParams pars2 := f_gen_test_hdlr_pars(bssap_idx := 1);
+ pars2.mscpool.rsl_idx := 1;
+ pars2.mscpool.l3_info := valueof(ts_LU_REQ(LU_Type_IMSI_Attach, valueof(ts_MI_TMSI_NRI_LV(0)), '00F110'O));
+ vc_conn2 := f_start_handler(refers(f_tc_mscpool_compl_l3), pars2);
+ vc_conn2.done;
+
+ /* Test round-robin wrap to the first MSC */
+ var MSC_ConnHdlr vc_conn3;
+ var TestHdlrParams pars3 := f_gen_test_hdlr_pars(bssap_idx := 0);
+ pars3.mscpool.rsl_idx := 2;
+ pars3.mscpool.l3_info := valueof(ts_LU_REQ(LU_Type_IMSI_Attach, valueof(ts_MI_TMSI_NRI_LV(0)), '00F110'O));
+ vc_conn3 := f_start_handler(refers(f_tc_mscpool_compl_l3), pars3);
+ vc_conn3.done;
+}
+
+/* Three LU by TMSI are round-robin'ed across two connected MSCs, because they contain the NULL-NRI 1
+ * (configured in osmo-bsc.cfg). In this case, one of the MSC also has the NULL-NRI as part of its owned NRIs, but the
+ * NULL-NRI setting is stronger than that. */
+/* FIXME: each run is using a separate RSLem: RSL, RSL1, RSL2. It should work
+ * just as well using only RSL. */
+testcase TC_mscpool_LU_by_tmsi_null_nri_1_round_robin() runs on test_CT {
+
+ f_init(nr_bts := 3, handler_mode := true, nr_msc := 2);
+ f_sleep(1.0);
+
+ /* Control which MSC gets chosen next by the round-robin, otherwise
+ * would be randomly affected by which other tests ran before this. */
+ f_vty_transceive(BSCVTY, "mscpool roundrobin next 0");
+
+ var MSC_ConnHdlr vc_conn1;
+ var TestHdlrParams pars1 := f_gen_test_hdlr_pars(bssap_idx := 0);
+ pars1.mscpool.rsl_idx := 0;
+ pars1.mscpool.l3_info := valueof(ts_LU_REQ(LU_Type_IMSI_Attach, valueof(ts_MI_TMSI_NRI_LV(1)), '00F110'O));
+ vc_conn1 := f_start_handler(refers(f_tc_mscpool_compl_l3), pars1);
+ vc_conn1.done;
+
+ var MSC_ConnHdlr vc_conn2;
+ var TestHdlrParams pars2 := f_gen_test_hdlr_pars(bssap_idx := 1);
+ pars2.mscpool.rsl_idx := 1;
+ pars2.mscpool.l3_info := valueof(ts_LU_REQ(LU_Type_IMSI_Attach, valueof(ts_MI_TMSI_NRI_LV(1)), '00F110'O));
+ vc_conn2 := f_start_handler(refers(f_tc_mscpool_compl_l3), pars2);
+ vc_conn2.done;
+
+ /* Test round-robin wrap to the first MSC */
+ var MSC_ConnHdlr vc_conn3;
+ var TestHdlrParams pars3 := f_gen_test_hdlr_pars(bssap_idx := 0);
+ pars3.mscpool.rsl_idx := 2;
+ pars3.mscpool.l3_info := valueof(ts_LU_REQ(LU_Type_IMSI_Attach, valueof(ts_MI_TMSI_NRI_LV(1)), '00F110'O));
+ vc_conn3 := f_start_handler(refers(f_tc_mscpool_compl_l3), pars3);
+ vc_conn3.done;
+}
+
+/* Three Layer 3 Complete by TMSI are round-robin'ed across two connected MSCs, because they contain an NRI not
+ * assigned to any MSC (configured in osmo-bsc.cfg). */
+/* FIXME: each run is using a separate RSLem: RSL, RSL1, RSL2. It should work
+ * just as well using only RSL. */
+testcase TC_mscpool_L3Complete_by_tmsi_unassigned_nri_round_robin() runs on test_CT {
+
+ f_init(nr_bts := 3, handler_mode := true, nr_msc := 2);
+ f_sleep(1.0);
+
+ /* Control which MSC gets chosen next by the round-robin, otherwise
+ * would be randomly affected by which other tests ran before this. */
+ f_vty_transceive(BSCVTY, "mscpool roundrobin next 0");
+
+ var MSC_ConnHdlr vc_conn1;
+ var TestHdlrParams pars1 := f_gen_test_hdlr_pars(bssap_idx := 0);
+ pars1.mscpool.rsl_idx := 0;
+ /* An NRI that is not assigned to any MSC */
+ pars1.mscpool.l3_info := valueof(ts_ML3_MO_MM_IMSI_DET_Ind(valueof(ts_MI_TMSI_NRI_LV(1023))));
+ vc_conn1 := f_start_handler(refers(f_tc_mscpool_compl_l3), pars1);
+ vc_conn1.done;
+
+ var MSC_ConnHdlr vc_conn2;
+ var TestHdlrParams pars2 := f_gen_test_hdlr_pars(bssap_idx := 1);
+ pars2.mscpool.rsl_idx := 1;
+ /* An NRI that is not assigned to any MSC */
+ pars2.mscpool.l3_info := valueof(ts_LU_REQ(LU_Type_IMSI_Attach, valueof(ts_MI_TMSI_NRI_LV(768)), '00F110'O));
+ vc_conn2 := f_start_handler(refers(f_tc_mscpool_compl_l3), pars2);
+ vc_conn2.done;
+
+ /* Test round-robin wrap to the first MSC */
+ var MSC_ConnHdlr vc_conn3;
+ var TestHdlrParams pars3 := f_gen_test_hdlr_pars(bssap_idx := 0);
+ pars3.mscpool.rsl_idx := 2;
+ /* An NRI that is not assigned to any MSC */
+ pars3.mscpool.l3_info := valueof(ts_CM_SERV_REQ(CM_TYPE_SS_ACT, valueof(ts_MI_TMSI_NRI_LV(819))));
+ vc_conn3 := f_start_handler(refers(f_tc_mscpool_compl_l3), pars3);
+ vc_conn3.done;
+}
+
+/* Three Layer 3 Complete by TMSI are round-robin'ed across two connected MSCs, because they contain an NRI
+ * assigned to an MSC that is currently not connected (configured in osmo-bsc.cfg). */
+/* FIXME: each run is using a separate RSLem: RSL, RSL1, RSL2. It should work
+ * just as well using only RSL. */
+testcase TC_mscpool_L3Complete_by_tmsi_valid_nri_msc_not_connected_round_robin() runs on test_CT {
+
+ f_init(nr_bts := 3, handler_mode := true, nr_msc := 2);
+ f_sleep(1.0);
+
+ /* Control which MSC gets chosen next by the round-robin, otherwise
+ * would be randomly affected by which other tests ran before this. */
+ f_vty_transceive(BSCVTY, "mscpool roundrobin next 0");
+
+ var MSC_ConnHdlr vc_conn1;
+ var TestHdlrParams pars1 := f_gen_test_hdlr_pars(bssap_idx := 0);
+ pars1.mscpool.rsl_idx := 0;
+ /* An NRI that is assigned to an unconnected MSC */
+ pars1.mscpool.l3_info := valueof(ts_PAG_RESP(valueof(ts_MI_TMSI_NRI_LV(512))));
+ vc_conn1 := f_start_handler(refers(f_tc_mscpool_compl_l3), pars1);
+ vc_conn1.done;
+
+ var MSC_ConnHdlr vc_conn2;
+ var TestHdlrParams pars2 := f_gen_test_hdlr_pars(bssap_idx := 1);
+ pars2.mscpool.rsl_idx := 1;
+ /* An NRI that is assigned to an unconnected MSC */
+ pars2.mscpool.l3_info := valueof(ts_ML3_MO_MM_IMSI_DET_Ind(valueof(ts_MI_TMSI_NRI_LV(767))));
+ vc_conn2 := f_start_handler(refers(f_tc_mscpool_compl_l3), pars2);
+ vc_conn2.done;
+
+ /* Test round-robin wrap to the first MSC */
+ var MSC_ConnHdlr vc_conn3;
+ var TestHdlrParams pars3 := f_gen_test_hdlr_pars(bssap_idx := 0);
+ pars3.mscpool.rsl_idx := 2;
+ /* An NRI that is assigned to an unconnected MSC */
+ pars3.mscpool.l3_info := valueof(ts_LU_REQ(LU_Type_IMSI_Attach, valueof(ts_MI_TMSI_NRI_LV(750)), '00F110'O));
+ vc_conn3 := f_start_handler(refers(f_tc_mscpool_compl_l3), pars3);
+ vc_conn3.done;
+}
+
+/* Three Layer 3 Complete by TMSI with valid NRI for the second MSC are all directed to the second MSC (configured in
+ * osmo-bsc.cfg). */
+/* FIXME: each run is using a separate RSLem: RSL, RSL1, RSL2. It should work
+ * just as well using only RSL. */
+testcase TC_mscpool_L3Complete_by_tmsi_valid_nri_1() runs on test_CT {
+
+ f_init(nr_bts := 3, handler_mode := true, nr_msc := 2);
+ f_sleep(1.0);
+
+ /* All TMSIs in this test point at the second MSC, set the round robin to point at the first MSC to make sure
+ * this is not using round-robin. */
+ f_vty_transceive(BSCVTY, "mscpool roundrobin next 0");
+
+ var MSC_ConnHdlr vc_conn1;
+ var TestHdlrParams pars1 := f_gen_test_hdlr_pars(bssap_idx := 1);
+ pars1.mscpool.rsl_idx := 0;
+ /* An NRI of the second MSC's range (256-511) */
+ pars1.mscpool.l3_info := valueof(ts_CM_SERV_REQ(CM_TYPE_MO_SMS, valueof(ts_MI_TMSI_NRI_LV(256))));
+ vc_conn1 := f_start_handler(refers(f_tc_mscpool_compl_l3), pars1);
+ vc_conn1.done;
+
+ var MSC_ConnHdlr vc_conn2;
+ var TestHdlrParams pars2 := f_gen_test_hdlr_pars(bssap_idx := 1);
+ pars2.mscpool.rsl_idx := 1;
+ /* An NRI of the second MSC's range (256-511) */
+ pars2.mscpool.l3_info := valueof(ts_PAG_RESP(valueof(ts_MI_TMSI_NRI_LV(260))));
+ vc_conn2 := f_start_handler(refers(f_tc_mscpool_compl_l3), pars2);
+ vc_conn2.done;
+
+ var MSC_ConnHdlr vc_conn3;
+ var TestHdlrParams pars3 := f_gen_test_hdlr_pars(bssap_idx := 1);
+ pars3.mscpool.rsl_idx := 2;
+ /* An NRI of the second MSC's range (256-511) */
+ pars3.mscpool.l3_info := valueof(ts_LU_REQ(LU_Type_IMSI_Attach, valueof(ts_MI_TMSI_NRI_LV(511)), '00F110'O));
+ vc_conn3 := f_start_handler(refers(f_tc_mscpool_compl_l3), pars3);
+ vc_conn3.done;
+}
+
+/* Layer 3 Complete by TMSI with valid NRI for the third MSC are directed to the third MSC (configured in osmo-bsc.cfg),
+ * while a round-robin remains unaffected by that. */
+/* FIXME: each run is using a separate RSLem: RSL, RSL1, RSL2. It should work
+ * just as well using only RSL. */
+testcase TC_mscpool_L3Complete_by_tmsi_valid_nri_2() runs on test_CT {
+
+ f_init(nr_bts := 3, handler_mode := true, nr_msc := 3);
+ f_sleep(1.0);
+
+ /* All TMSIs in this test point at the third MSC, set the round robin to point at the second MSC to make sure
+ * this is not using round-robin. */
+ f_vty_transceive(BSCVTY, "mscpool roundrobin next 1");
+
+ var MSC_ConnHdlr vc_conn1;
+ var TestHdlrParams pars1 := f_gen_test_hdlr_pars(bssap_idx := 2);
+ pars1.mscpool.rsl_idx := 0;
+ /* An NRI of the third MSC's range (512-767) */
+ pars1.mscpool.l3_info := valueof(ts_CM_SERV_REQ(CM_TYPE_MO_SMS, valueof(ts_MI_TMSI_NRI_LV(512))));
+ vc_conn1 := f_start_handler(refers(f_tc_mscpool_compl_l3), pars1);
+ vc_conn1.done;
+
+ var MSC_ConnHdlr vc_conn2;
+ var TestHdlrParams pars2 := f_gen_test_hdlr_pars(bssap_idx := 2);
+ pars2.mscpool.rsl_idx := 1;
+ /* An NRI of the third MSC's range (512-767) */
+ pars2.mscpool.l3_info := valueof(ts_PAG_RESP(valueof(ts_MI_TMSI_NRI_LV(678))));
+ vc_conn2 := f_start_handler(refers(f_tc_mscpool_compl_l3), pars2);
+ vc_conn2.done;
+
+ /* The above forwardings to third MSC have not affected the round robin, which still points at the second MSC */
+ var MSC_ConnHdlr vc_conn3;
+ var TestHdlrParams pars3 := f_gen_test_hdlr_pars(bssap_idx := 1);
+ pars3.mscpool.rsl_idx := 2;
+ pars3.mscpool.l3_info := valueof(ts_LU_REQ(LU_Type_IMSI_Attach, valueof(ts_MI_IMSI_LV('001010000000013'H)), '00F110'O));
+ vc_conn3 := f_start_handler(refers(f_tc_mscpool_compl_l3), pars3);
+ vc_conn3.done;
+}
+
+/* LU with a TMSI but indicating a different PLMN in its previous LAI: ignore the NRI. */
+/* FIXME: each run is using a separate RSLem: RSL, RSL1, RSL2. It should work
+ * just as well using only RSL. */
+testcase TC_mscpool_LU_by_tmsi_from_other_PLMN() runs on test_CT {
+
+ f_init(nr_bts := 3, handler_mode := true, nr_msc := 3);
+ f_sleep(1.0);
+
+ /* The TMSIs in this test points at the second MSC, but since it is from a different PLMN, round-robin is used
+ * instead, and hits msc 0. */
+ f_vty_transceive(BSCVTY, "mscpool roundrobin next 0");
+
+ /* An NRI of the second MSC's range (256-511), but a PLMN that doesn't match with osmo-bsc.cfg */
+ var MSC_ConnHdlr vc_conn1;
+ var TestHdlrParams pars1 := f_gen_test_hdlr_pars(bssap_idx := 0);
+ pars1.mscpool.rsl_idx := 0;
+ pars1.mscpool.l3_info := valueof(ts_LU_REQ(LU_Type_IMSI_Attach, valueof(ts_MI_TMSI_NRI_LV(260)), '99F999'O));
+ vc_conn1 := f_start_handler(refers(f_tc_mscpool_compl_l3), pars1);
+ vc_conn1.done;
+
+ /* An NRI of the third MSC's range (512-767) and a matching PLMN gets directed by NRI. */
+ var MSC_ConnHdlr vc_conn2;
+ var TestHdlrParams pars2 := f_gen_test_hdlr_pars(bssap_idx := 2);
+ pars2.mscpool.rsl_idx := 1;
+ pars2.mscpool.l3_info := valueof(ts_LU_REQ(LU_Type_IMSI_Attach, valueof(ts_MI_TMSI_NRI_LV(555)), '00F110'O));
+ vc_conn2 := f_start_handler(refers(f_tc_mscpool_compl_l3), pars2);
+ vc_conn2.done;
+}
+
+/* Make sure that whichever MSC paged a subscriber will also get the Paging Response. Page by IMSI, which would be
+ * round-robined to another MSC, to make sure the Paging->Response relation is stronger than the NRI->MSC mapping. */
+private function f_tc_mscpool_paging_imsi(charstring id) runs on MSC_ConnHdlr {
+ var template BSSMAP_FIELD_CellIdentificationList cid_list := { cIl_CI := { ts_BSSMAP_CI_CI(0) } };
+ //cid_list := { cIl_allInBSS := ''O };
+ var RSL_ChanNeeded rsl_chneed := RSL_CHANNEED_SDCCH;
+ var template BSSMAP_IE_ChannelNeeded bssmap_chneed := ts_BSSMAP_IE_ChanNeeded(int2bit(enum2int(valueof(rsl_chneed)),2));
+ var BSSAP_N_UNITDATA_req paging;
+ var hexstring imsi := '001010000000123'H;
+
+ f_MscConnHdlr_init(g_pars.media_nr, "127.0.0.2", "127.0.0.3", FR_AMR);
+
+ paging := valueof(ts_BSSAP_UNITDATA_req(g_pars.mscpool.sccp_addr_bsc, g_pars.mscpool.sccp_addr_msc,
+ valueof(ts_BSSMAP_Paging(imsi, cid_list, omit, bssmap_chneed))));
+ BSSAP.send(paging);
+
+ /* Register any RSL conn so that the Paging Command gets received here. With the current RSL_Emulation's main()
+ * handling of '[bts_role] IPA_PT.receive(tr_ASP_RSL_UD(tr_RSL_PAGING_CMD()))' it doesn't matter at all which
+ * channel number is picked here. */
+ var RslChannelNr new_chan_nr := valueof(t_RslChanNr0(0, RSL_CHAN_NR_INVALID));
+ f_rslem_register(0, new_chan_nr);
+ RSL.receive(tr_RSL_PAGING_CMD(tr_MI_IMSI(imsi)));
+ f_rslem_unregister(0, new_chan_nr);
+
+ /* Despite the round robin pointing at the second MSC ('roundrobin next 1'), the earlier Paging for the same IMSI
+ * causes this Paging Response to go to the first MSC (bssap_idx := 0). */
+ f_perform_compl_l3(RSL, ts_PAG_RESP(valueof(ts_MI_IMSI_LV(imsi))) );
+ setverdict(pass);
+ f_sleep(1.0);
+}
+testcase TC_mscpool_paging_and_response_imsi() runs on test_CT {
+ f_init(nr_bts := 1, handler_mode := true, nr_msc := 3);
+ f_sleep(1.0);
+
+ /* Testing a Paging on the first MSC to get a Paging Response back to the first MSC. Set round robin to the
+ * second MSC to make sure we're getting the Paging logic, not a coincidental round robin match. */
+ f_vty_transceive(BSCVTY, "mscpool roundrobin next 1");
+
+ var MSC_ConnHdlr vc_conn1;
+ var TestHdlrParams pars1 := f_gen_test_hdlr_pars(bssap_idx := 0);
+ pars1.mscpool.rsl_idx := 0;
+ pars1.mscpool.sccp_addr_bsc := g_bssap[pars1.mscpool.bssap_idx].sccp_addr_peer;
+ pars1.mscpool.sccp_addr_msc := g_bssap[pars1.mscpool.bssap_idx].sccp_addr_own;
+ vc_conn1 := f_start_handler(refers(f_tc_mscpool_paging_imsi), pars1);
+ vc_conn1.done;
+}
+
+/* Make sure that whichever MSC paged a subscriber will also get the Paging Response. Page by TMSI with an NRI value
+ * that matches a different MSC, to make sure the Paging->Response relation is stronger than the NRI->MSC mapping. */
+private function f_tc_mscpool_paging_tmsi(charstring id) runs on MSC_ConnHdlr {
+ var template BSSMAP_FIELD_CellIdentificationList cid_list := { cIl_CI := { ts_BSSMAP_CI_CI(0) } };
+ //cid_list := { cIl_allInBSS := ''O };
+ var RSL_ChanNeeded rsl_chneed := RSL_CHANNEED_SDCCH;
+ var template BSSMAP_IE_ChannelNeeded bssmap_chneed := ts_BSSMAP_IE_ChanNeeded(int2bit(enum2int(valueof(rsl_chneed)),2));
+ var integer nri_v := 300; /* <-- second MSC's NRI */
+ var octetstring tmsi := f_tmsi_nri(nri_v);
+ var BSSAP_N_UNITDATA_req paging;
+
+ f_MscConnHdlr_init(g_pars.media_nr, "127.0.0.2", "127.0.0.3", FR_AMR);
+
+ paging := valueof(ts_BSSAP_UNITDATA_req(g_pars.mscpool.sccp_addr_bsc, g_pars.mscpool.sccp_addr_msc,
+ valueof(ts_BSSMAP_Paging('001010000000011'H, cid_list, tmsi, bssmap_chneed))));
+ BSSAP.send(paging);
+
+ /* Register any RSL conn so that the Paging Command gets received here. With the current RSL_Emulation's main()
+ * handling of '[bts_role] IPA_PT.receive(tr_ASP_RSL_UD(tr_RSL_PAGING_CMD()))' it doesn't matter at all which
+ * channel number is picked here. */
+ var RslChannelNr new_chan_nr := valueof(t_RslChanNr0(0, RSL_CHAN_NR_INVALID));
+ f_rslem_register(0, new_chan_nr);
+ RSL.receive(tr_RSL_PAGING_CMD(t_MI_TMSI(tmsi)));
+ f_rslem_unregister(0, new_chan_nr);
+
+ /* Despite the NRI matching the second MSC (NRI from 'msc 1' in osmo-bsc.cfg) and round robin pointing at the
+ * third MSC ('roundrobin next 2'), the earlier Paging for the same TMSI causes this Paging Response to go to
+ * the first MSC (bssap_idx := 0). */
+ f_perform_compl_l3(RSL, ts_PAG_RESP(valueof(ts_MI_TMSI_NRI_LV(nri_v))) );
+ setverdict(pass);
+ f_sleep(1.0);
+}
+testcase TC_mscpool_paging_and_response_tmsi() runs on test_CT {
+ f_init(nr_bts := 1, handler_mode := true, nr_msc := 3);
+ f_sleep(1.0);
+
+ /* Testing a Paging on the first MSC to get a Paging Response back to the first MSC. Set round robin to the
+ * third MSC to make sure we're getting the Paging logic, not a coincidental round robin match. */
+ f_vty_transceive(BSCVTY, "mscpool roundrobin next 2");
+
+ var MSC_ConnHdlr vc_conn1;
+ var TestHdlrParams pars1 := f_gen_test_hdlr_pars(bssap_idx := 0);
+ pars1.mscpool.rsl_idx := 0;
+ pars1.mscpool.sccp_addr_bsc := g_bssap[pars1.mscpool.bssap_idx].sccp_addr_peer;
+ pars1.mscpool.sccp_addr_msc := g_bssap[pars1.mscpool.bssap_idx].sccp_addr_own;
+ vc_conn1 := f_start_handler(refers(f_tc_mscpool_paging_tmsi), pars1);
+ vc_conn1.done;
+}
+
+/* For round-robin, skip an MSC that has 'no allow-attach' set. */
+/* FIXME: each run is using a separate RSLem: RSL, RSL1, RSL2. It should work
+ * just as well using only RSL. */
+testcase TC_mscpool_no_allow_attach_round_robin() runs on test_CT {
+
+ f_init(nr_bts := 3, handler_mode := true, nr_msc := 3);
+ f_sleep(1.0);
+
+ /* Control which MSC gets chosen next by the round-robin, otherwise
+ * would be randomly affected by which other tests ran before this. */
+ f_vty_transceive(BSCVTY, "mscpool roundrobin next 0");
+
+ /* Mark the second MSC as offloading, round-robin should skip this MSC now. */
+ f_vty_enter_cfg_msc(BSCVTY, 1);
+ f_vty_transceive(BSCVTY, "no allow-attach");
+ f_vty_transceive(BSCVTY, "exit");
+ f_vty_transceive(BSCVTY, "exit");
+
+ var MSC_ConnHdlr vc_conn1;
+ var TestHdlrParams pars1 := f_gen_test_hdlr_pars(bssap_idx := 0);
+ pars1.mscpool.rsl_idx := 0;
+ pars1.mscpool.l3_info := valueof(ts_LU_REQ(LU_Type_IMSI_Attach, valueof(ts_MI_IMSI_LV('001010000000001'H)), '00F110'O));
+ vc_conn1 := f_start_handler(refers(f_tc_mscpool_compl_l3), pars1);
+ vc_conn1.done;
+
+ var MSC_ConnHdlr vc_conn2;
+ var TestHdlrParams pars2 := f_gen_test_hdlr_pars(bssap_idx := 2);
+ pars2.mscpool.rsl_idx := 1;
+ pars2.mscpool.l3_info := valueof(ts_CM_SERV_REQ(CM_TYPE_MO_CALL, valueof(ts_MI_IMSI_LV('001010000000002'H))));
+ vc_conn2 := f_start_handler(refers(f_tc_mscpool_compl_l3), pars2);
+ vc_conn2.done;
+
+ var MSC_ConnHdlr vc_conn3;
+ var TestHdlrParams pars3 := f_gen_test_hdlr_pars(bssap_idx := 0);
+ pars3.mscpool.rsl_idx := 2;
+ pars3.mscpool.l3_info := valueof(ts_PAG_RESP(valueof(ts_MI_IMSI_LV('001010000000003'H))));
+ vc_conn3 := f_start_handler(refers(f_tc_mscpool_compl_l3), pars3);
+ vc_conn3.done;
+
+ f_vty_enter_cfg_msc(BSCVTY, 1);
+ f_vty_transceive(BSCVTY, "allow-attach");
+ f_vty_transceive(BSCVTY, "exit");
+ f_vty_transceive(BSCVTY, "exit");
+}
+
+/* An MSC that has 'no allow-attach' set should still serve subscribers that are already attached according to their
+ * TMSI NRI. */
+testcase TC_mscpool_no_allow_attach_valid_nri() runs on test_CT {
+
+ f_init(nr_bts := 3, handler_mode := true, nr_msc := 3);
+ f_sleep(1.0);
+
+ /* Control which MSC gets chosen next by the round-robin, otherwise
+ * would be randomly affected by which other tests ran before this. */
+ f_vty_transceive(BSCVTY, "mscpool roundrobin next 0");
+
+ /* Mark the second MSC as offloading, round-robin should skip this MSC now. */
+ f_vty_enter_cfg_msc(BSCVTY, 1);
+ f_vty_transceive(BSCVTY, "no allow-attach");
+ f_vty_transceive(BSCVTY, "exit");
+ f_vty_transceive(BSCVTY, "exit");
+
+ /* Round robin points at msc 0, but the valid NRI directs to msc 1, even though msc 1 has 'no allow-attach'. */
+ var MSC_ConnHdlr vc_conn1;
+ var TestHdlrParams pars1 := f_gen_test_hdlr_pars(bssap_idx := 1);
+ pars1.mscpool.rsl_idx := 0;
+ /* An NRI of the second MSC's range (256-511) */
+ pars1.mscpool.l3_info := valueof(ts_CM_SERV_REQ(CM_TYPE_MO_CALL, valueof(ts_MI_TMSI_NRI_LV(260))));
+ vc_conn1 := f_start_handler(refers(f_tc_mscpool_compl_l3), pars1);
+ vc_conn1.done;
+
+ var MSC_ConnHdlr vc_conn2;
+ var TestHdlrParams pars2 := f_gen_test_hdlr_pars(bssap_idx := 0);
+ pars2.mscpool.rsl_idx := 1;
+ pars2.mscpool.l3_info := valueof(ts_CM_SERV_REQ(CM_TYPE_MO_CALL, valueof(ts_MI_IMSI_LV('001010000000002'H))));
+ vc_conn2 := f_start_handler(refers(f_tc_mscpool_compl_l3), pars2);
+ vc_conn2.done;
+
+ var MSC_ConnHdlr vc_conn3;
+ var TestHdlrParams pars3 := f_gen_test_hdlr_pars(bssap_idx := 2);
+ pars3.mscpool.rsl_idx := 2;
+ pars3.mscpool.l3_info := valueof(ts_CM_SERV_REQ(CM_TYPE_MO_CALL, valueof(ts_MI_IMSI_LV('001010000000003'H))));
+ vc_conn3 := f_start_handler(refers(f_tc_mscpool_compl_l3), pars3);
+ vc_conn3.done;
+
+ f_vty_enter_cfg_msc(BSCVTY, 1);
+ f_vty_transceive(BSCVTY, "allow-attach");
+ f_vty_transceive(BSCVTY, "exit");
+ f_vty_transceive(BSCVTY, "exit");
+}
+
/* Dyn PDCH todo:
* activate OSMO as TCH/F
* activate OSMO as TCH/H
@@ -4616,6 +5247,28 @@ control {
/* Power control related */
execute( TC_assignment_verify_ms_power_params_ie() );
+
+ /* MSC pooling */
+ /* FIXME: in SCCPlite, indicating how many MSCs should be connected does currently not work. Since
+ * RESET->RESET-ACK is unconditionally negotiated for all configured MSCs, they always all appear as connected
+ * to osmo-bsc. The MSC pooling tests however require disconnecting selected MSCs, and hence don't work out as
+ * intended on SCCPlite. So for now, run these only for SCCP/M3UA. */
+ if (mp_bssap_cfg[0].transport == BSSAP_TRANSPORT_AoIP) {
+ execute( TC_mscpool_L3Compl_on_1_msc() );
+ execute( TC_mscpool_L3Complete_by_imsi_round_robin() );
+ execute( TC_mscpool_LU_by_tmsi_null_nri_0_round_robin() );
+ execute( TC_mscpool_LU_by_tmsi_null_nri_1_round_robin() );
+ execute( TC_mscpool_L3Complete_by_tmsi_unassigned_nri_round_robin() );
+ execute( TC_mscpool_L3Complete_by_tmsi_valid_nri_msc_not_connected_round_robin() );
+ execute( TC_mscpool_L3Complete_by_tmsi_valid_nri_1() );
+ execute( TC_mscpool_L3Complete_by_tmsi_valid_nri_2() );
+ execute( TC_mscpool_LU_by_tmsi_from_other_PLMN() );
+ execute( TC_mscpool_paging_and_response_imsi() );
+ execute( TC_mscpool_paging_and_response_tmsi() );
+ execute( TC_mscpool_no_allow_attach_round_robin() );
+ execute( TC_mscpool_no_allow_attach_valid_nri() );
+ }
+
/* at bottom as they might crash OsmoBSC before OS#3182 is fixed */
execute( TC_early_conn_fail() );
execute( TC_late_conn_fail() );
diff --git a/bsc/MSC_ConnectionHandler.ttcn b/bsc/MSC_ConnectionHandler.ttcn
index feedc6f..fece825 100644
--- a/bsc/MSC_ConnectionHandler.ttcn
+++ b/bsc/MSC_ConnectionHandler.ttcn
@@ -482,7 +482,7 @@ const MGCPOps MSC_MGCPOps := {
}
/* register an expect with the BSSMAP core */
-private function f_create_bssmap_exp(octetstring l3_enc) runs on MSC_ConnHdlr {
+function f_create_bssmap_exp(octetstring l3_enc) runs on MSC_ConnHdlr {
RAN.call(RAN_register:{l3_enc, self}) {
[] RAN.getreply(RAN_register:{?, ?}) {};
}
@@ -515,7 +515,11 @@ type record TestHdlrParamsHandover {
}
type record TestHdlrParamsMSCPool {
- integer bssap_idx
+ integer bssap_idx,
+ SCCP_PAR_Address sccp_addr_msc optional,
+ SCCP_PAR_Address sccp_addr_bsc optional,
+ integer rsl_idx,
+ PDU_ML3_MS_NW l3_info optional
}
type record TestHdlrParams {
@@ -563,7 +567,11 @@ template (value) TestHdlrParams t_def_TestHdlrPars := {
aoip := true,
use_osmux := false,
mscpool := {
- bssap_idx := 0
+ bssap_idx := 0,
+ sccp_addr_msc := omit,
+ sccp_addr_bsc := omit,
+ rsl_idx := 0,
+ l3_info := omit
}
}
diff --git a/library/L3_Templates.ttcn b/library/L3_Templates.ttcn
index ba91180..8b09572 100644
--- a/library/L3_Templates.ttcn
+++ b/library/L3_Templates.ttcn
@@ -278,6 +278,78 @@ template (value) MobileStationClassmark2_LV ts_CM2 := {
}
};
+template LocationUpdatingType LU_Type_Normal := {
+ lut := '00'B,
+ spare1_1 := '0'B,
+ fop := '0'B
+};
+
+template LocationUpdatingType LU_Type_Periodic := {
+ lut := '01'B,
+ spare1_1 := '0'B,
+ fop := '0'B
+};
+
+template LocationUpdatingType LU_Type_IMSI_Attach := {
+ lut := '10'B,
+ spare1_1 := '0'B,
+ fop := '0'B
+};
+
+/* Send template for LOCATION UPDATING REQUEST */
+template PDU_ML3_MS_NW ts_LU_REQ(template LocationUpdatingType lu_type, MobileIdentityLV mi_lv,
+ OCT3 mcc_mnc := '123456'O) := {
+ discriminator := '0000'B, /* overwritten */
+ tiOrSkip := {
+ skipIndicator := '0000'B
+ },
+ msgs := {
+ mm := {
+ locationUpdateRequest := {
+ messageType := '000000'B, /* overwritten */
+ nsd := '00'B,
+ locationUpdatingType := lu_type,
+ cipheringKeySequenceNumber := { '000'B, '0'B },
+ locationAreaIdentification := {
+ mcc_mnc := mcc_mnc,
+ lac := '172A'O
+ },
+ mobileStationClassmark1 := ts_CM1,
+ mobileIdentityLV := mi_lv,
+ classmarkInformationType2_forUMTS := omit,
+ additionalUpdateParameterTV := omit,
+ deviceProperties := omit,
+ mS_NetworkFeatureSupport := omit
+ }
+ }
+ }
+}
+
+template PDU_ML3_NW_MS ts_LU_ACCEPT(template MobileIdentityTLV mi_tlv := omit) := {
+ discriminator := '0000'B, /* overwritten */
+ tiOrSkip := {
+ skipIndicator := '0000'B
+ },
+ msgs := {
+ mm := {
+ locationUpdateAccept := {
+ messageType := '000000'B, /* overwritten */
+ nsd := '00'B,
+ locationAreaIdentification := {
+ mcc_mnc := '123456'O,
+ lac := '172A'O
+ },
+ mobileIdentityTLV := mi_tlv,
+ followOnProceed := omit,
+ cTS_Permission := omit,
+ equivalentPLMNs := omit,
+ emergencyNumberList := omit,
+ perMS_T3212 := omit
+ }
+ }
+ }
+}
+
/* Send template for CM SERVICE REQUEST */
template (value) PDU_ML3_MS_NW ts_CM_SERV_REQ(CmServiceType serv_type, MobileIdentityLV mi_lv) := {
discriminator := '0000'B, /* overwritten */