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osmo-ttcn3-hacks
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bsc: inter-BSC incoming HO in with empty SCCP CR 

Test inter-BSC incoming HO where the Handover Request message is not
included in the initial SCCP N-Connect, but follows in a separate DT1.

Related: SYS#5864
Depends: I535c791fa01e99a2226392eb05f676ba6c3cc16e (osmo-bsc)
Change-Id: I6732153cdd0d529bfaf0925387e765f3403a756b
This commit is contained in:
Neels Hofmeyr 2022-03-02 19:57:12 +01:00
parent 907b23b93a
commit a23f3b1ecb
3 changed files with 29 additions and 10 deletions
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29
bsc/BSC_Tests.ttcn
View File

@ -6009,12 +6009,18 @@ private function f_ho_into_this_bsc(charstring id, template (omit) BSSMAP_oldToN
f_MscConnHdlr_init(g_pars.media_nr, "127.0.0.2", "127.0.0.3", FR_AMR);
activate(as_Media());
BSSAP.send(ts_BSSAP_Conn_Req(g_pars.sccp_addr_bsc, g_pars.sccp_addr_msc,
f_gen_handover_req(aoip_tla := g_pars.host_aoip_tla,
cell_id_source := g_pars.cell_id_source,
oldToNewBSSIEs := oldToNewBSSIEs,
enc := g_pars.encr)));
BSSAP.receive(RAN_Conn_Prim:MSC_CONN_PRIM_CONF_IND);
var PDU_BSSAP ho_req := f_gen_handover_req(aoip_tla := g_pars.host_aoip_tla,
cell_id_source := g_pars.cell_id_source,
oldToNewBSSIEs := oldToNewBSSIEs,
enc := g_pars.encr);
if (g_pars.inter_bsc_ho_in__ho_req_in_initial_sccp_cr) {
BSSAP.send(ts_BSSAP_Conn_Req(g_pars.sccp_addr_bsc, g_pars.sccp_addr_msc, ho_req));
BSSAP.receive(RAN_Conn_Prim:MSC_CONN_PRIM_CONF_IND);
} else {
BSSAP.send(ts_BSSAP_Conn_Req(g_pars.sccp_addr_bsc, g_pars.sccp_addr_msc, omit));
BSSAP.receive(RAN_Conn_Prim:MSC_CONN_PRIM_CONF_IND);
BSSAP.send(ho_req);
}
alt {
[] BSSAP.receive(tr_BSSMAP_HandoverRequestAcknowledge(?)) -> value rx_bssap {
@ -6686,6 +6692,16 @@ testcase TC_ho_in_fail_no_detect2() runs on test_CT {
f_shutdown_helper();
}
/* An incoming inter-BSC HO can either issue the Handover Request message attached to the initial SCCP N-Connect (as in
* the other tests we have so far), or the first CR can be "empty" with the BSSAP request following later. Test the
* empty N-Connect case. */
testcase TC_ho_into_this_bsc_sccp_cr_without_bssap() runs on test_CT {
var TestHdlrParams pars := f_gen_test_hdlr_pars();
pars.inter_bsc_ho_in__ho_req_in_initial_sccp_cr := false;
f_tc_ho_into_this_bsc_main(pars);
f_shutdown_helper();
}
type record of charstring Commands;
private function f_bts_0_cfg(TELNETasp_PT pt, Commands cmds := {})
@ -11347,6 +11363,7 @@ control {
execute( TC_ho_in_fail_msc_clears_after_ho_detect() );
execute( TC_ho_in_fail_no_detect() );
execute( TC_ho_in_fail_no_detect2() );
execute( TC_ho_into_this_bsc_sccp_cr_without_bssap() );
execute( TC_ho_neighbor_config_1() );
execute( TC_ho_neighbor_config_2() );

6
bsc/MSC_ConnectionHandler.ttcn
View File

@ -671,7 +671,8 @@ type record TestHdlrParams {
boolean expect_channel_mode_modify,
uint3_t expect_tsc optional,
BSSMAP_IE_CellIdentifier cell_id_source,
boolean expect_ho_fail
boolean expect_ho_fail,
boolean inter_bsc_ho_in__ho_req_in_initial_sccp_cr
};
/* Note: Do not use valueof() to get a value of this template, use
@ -712,7 +713,8 @@ template (value) TestHdlrParams t_def_TestHdlrPars := {
expect_channel_mode_modify := false,
expect_tsc := omit,
cell_id_source := valueof(ts_CellID_LAC_CI(1, 1)),
expect_ho_fail := false
expect_ho_fail := false,
inter_bsc_ho_in__ho_req_in_initial_sccp_cr := true
}
function f_create_chan_and_exp(template (present) PDU_BSSAP exp_l3_compl := ?)

4
library/RAN_Emulation.ttcnpp
View File

@ -439,9 +439,9 @@ runs on RAN_Emulation_CT return RAN_ConnHdlr {
type record BSSAP_Conn_Req {
SCCP_PAR_Address addr_peer,
SCCP_PAR_Address addr_own,
PDU_BSSAP bssap
PDU_BSSAP bssap optional
}
template BSSAP_Conn_Req ts_BSSAP_Conn_Req(SCCP_PAR_Address peer, SCCP_PAR_Address own, PDU_BSSAP bssap) := {
template BSSAP_Conn_Req ts_BSSAP_Conn_Req(SCCP_PAR_Address peer, SCCP_PAR_Address own, template (omit) PDU_BSSAP bssap) := {
addr_peer := peer,
addr_own := own,
bssap := bssap