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osmo-ttcn3-hacks
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gbproxy: Introduce TC_llc_discarded 

This tests the LLC-DISCARDED message, which relates to a BVCI but
is itself sent on BVCI=0.  We expect it transparently passes from BSS
to SGSN.

Change-Id: I98d02d6fa68bddf15b732d06dab00e91e72995d1
This commit is contained in:
Harald Welte 2020-11-27 22:49:02 +01:00
parent f8e5c5dfc7
commit c0351d1015
2 changed files with 26 additions and 1 deletions
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25
gbproxy/GBProxy_Tests.ttcn
View File

@ -1881,6 +1881,30 @@ testcase TC_trace() runs on GlobalTest_CT
f_cleanup();
}
private function f_TC_llc_discarded(charstring id) runs on BSSGP_ConnHdlr {
var BssgpBvci bvci := g_pars.pcu[0].cfg.bvc[0].bvci;
var template (value) PDU_BSSGP pdu_tx := ts_BSSGP_LLC_DISCARDED(g_pars.tlli, 23, bvci, 2342);
/* we cannot use pdu_tx as there are some subtle differences in the length field :/ */
var template (present) PDU_BSSGP pdu_rx := tr_BSSGP_LLC_DISCARDED(g_pars.tlli, 23, bvci, 2342);
f_pcu2sgsn(pdu_tx, pdu_rx, use_sig := true);
setverdict(pass);
}
/* Send a LLC-DISCARDED from BSS side and expect it to show up on SGSN (SIG BVC) */
testcase TC_llc_discarded() runs on test_CT
{
var BSSGP_ConnHdlr vc_conn;
f_init();
vc_conn := f_start_handler(refers(f_TC_llc_discarded), testcasename(), g_pcu, g_sgsn, 6);
vc_conn.done;
/* TODO: start multiple handlers (UEs) on various cells on same and other NSEs */
f_cleanup();
}
private function f_block_ptp_bvc_from_pcu(integer pcu_idx, integer bvc_idx) runs on test_CT
{
var BSSGP_BVC_CT bvc_ct := g_pcu[pcu_idx].vc_BSSGP_BVC[bvc_idx];
@ -2113,6 +2137,7 @@ control {
execute( TC_suspend() );
execute( TC_resume() );
execute( TC_trace() );
execute( TC_llc_discarded() );
execute( TC_bvc_block_ptp() );
execute( TC_bvc_unblock_ptp() );
execute( TC_bvc_reset_ptp_from_bss() );

2
library/Osmocom_Gb_Types.ttcn
View File

@ -829,7 +829,7 @@ octetstring sdu) := {
iEI := '0F'O,
ext := '1'B,
lengthIndicator := {
length1 := 2
length1 := 1
},
number_of_frames_discarded := f_hex_or_wc(frames_discarded, 2)
}