Harald Welte has submitted this change and it was merged. (
https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/14346 )
Change subject: bts: Add test for expiring T200 N200+1 times
......................................................................
bts: Add test for expiring T200 N200+1 times
Change-Id: I9e1dbc889575f8952a4581551076829825b3b1cd
---
M bts/BTS_Tests_LAPDm.ttcn
1 file changed, 91 insertions(+), 0 deletions(-)
Approvals:
Harald Welte: Looks good to me, approved
Jenkins Builder: Verified
diff --git a/bts/BTS_Tests_LAPDm.ttcn b/bts/BTS_Tests_LAPDm.ttcn
index 07b785e..ffa3aa9 100644
--- a/bts/BTS_Tests_LAPDm.ttcn
+++ b/bts/BTS_Tests_LAPDm.ttcn
@@ -845,7 +845,97 @@
f_testmatrix_each_chan(pars, refers(f_TC_segm_concat_sacch));
}
+/* TS 04.06 Section 5.8.2.1 */
+private function f_n200_by_chan_nr(RslChannelNr chan_nr, RslLinkId link_id)
return integer {
+ /* SACCH irrespective of physical channel type */
+ if (match(link_id, tr_RslLinkID_SACCH(?))) {
+ return 5;
+ }
+ /* DCCH below */
+ select (chan_nr) {
+ case (t_RslChanNr_SDCCH4(?, ?)) { return 23; }
+ case (t_RslChanNr_SDCCH8(?, ?)) { return 23; }
+ case (t_RslChanNr_Bm(?)) { return 34; }
+ case (t_RslChanNr_Lm(?, ?)) { return 29; }
+ }
+ setverdict(fail, "Unknown chan_nr ", chan_nr, " or link_id ", link_id);
+ return -1;
+}
+/* Test if there are exactly N200+1 transmissions of I frames; inspired by
25.2.4.1 */
+private function f_TC_t200_n200(charstring id) runs on ConnHdlr {
+ var RslLinkId link_id := valueof(ts_RslLinkID_DCCH(0));
+ var integer sapi := link_id.sapi;
+ var boolean is_sacch := false;
+ if (link_id.c == SACCH) {
+ is_sacch := true;
+ }
+ var integer n200 := f_n200_by_chan_nr(g_chan_nr, link_id);
+ var integer num_retrans := 0;
+ timer T := 3.0;
+ var default d;
+
+ fp_common_init();
+
+ /* some common altstep for meas res and other background noise */
+ d := activate(as_ignore_background(true));
+ RSL.clear;
+ LAPDM.clear;
+
+ var octetstring l3_mo := f_rnd_octstring(20);
+ LAPDM.send(t_PH_DATA(0, is_sacch, ts_LAPDm_SABM(sapi, c_r:=cr_MO_CMD,
p:=true, l3:=l3_mo)));
+ RSL.receive(tr_RSL_EST_IND(g_chan_nr, link_id, l3_mo));
+ LAPDM.receive(t_PH_DATA(0, is_sacch, tr_LAPDm_UA(sapi, cr_MT_RSP,
f:=true, l3:=l3_mo)));
+
+ var octetstring l3_mt := f_rnd_octstring(20);
+ RSL.send(ts_RSL_DATA_REQ(g_chan_nr, link_id, l3_mt));
+ /* first transmission, P = 0 */
+ LAPDM.receive(t_PH_DATA(0, is_sacch, tr_LAPDm_I(sapi, c_r:=cr_MT_CMD,
p:=false,
+ nr:=0, ns:=0,
l3:=l3_mt)));
+ deactivate(d);
+
+ alt {
+ /* re-transmission, P = 1 */
+ [] LAPDM.receive(t_PH_DATA(0, is_sacch,
+ tr_LAPDm_I(sapi, c_r:=cr_MT_CMD, p:=true,
nr:=0, ns:=0, l3:=l3_mt))) {
+ num_retrans := num_retrans + 1;
+ if (num_retrans < n200) {
+ repeat;
+ } else if (num_retrans == n200) {
+ T.start; /* wait for some more time if there are more
retransmissions */
+ repeat;
+ } else {
+ /* break */
+ }
+ }
+ [] LAPDM.receive(t_PH_DATA(0, false, tr_LAPDm_I(sapi, ?, ?, ?, ?, ?))) {
+ setverdict(fail, "Received unexpected I frame");
+ }
+ [not is_sacch] as_lapdm_acch();
+ [is_sacch] as_lapdm_dcch();
+ [] as_lapdm_idle();
+ [] as_rsl_meas_rep();
+ [num_retrans == n200] RSL.receive(tr_RSL_ERROR_IND(g_chan_nr, link_id,
'01'O)) {
+ /* break */
+ }
+ [] T.timeout {
+ setverdict(fail, "Missing RSL RLL ERROR INDICATION");
+ }
+ }
+
+ if (num_retrans == n200) {
+ setverdict(pass, "Received ", num_retrans, " on channel ",
g_chan_nr, " link ", link_id);
+ } else if (num_retrans < n200) {
+ setverdict(fail, "Too few retransmissions (", num_retrans, ");
N200=", n200,
+ " on channel ", g_chan_nr, " link ", link_id);
+ }
+
+ fp_common_fini();
+}
+testcase TC_t200_n200() runs on test_CT {
+ var ConnHdlrPars pars := valueof(t_Pars(t_RslChanNr_Bm(1),
ts_RSL_ChanMode_SIGN));
+ f_testmatrix_each_chan(pars, refers(f_TC_t200_n200));
+}
control {
execute(TC_foo());
@@ -863,6 +953,7 @@
execute(TC_iframe_timer_recovery());
execute(TC_segm_concat_dcch());
execute(TC_segm_concat_sacch());
+ execute(TC_t200_n200());
}
}
--
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Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-Change-Id: I9e1dbc889575f8952a4581551076829825b3b1cd
Gerrit-Change-Number: 14346
Gerrit-PatchSet: 5
Gerrit-Owner: Harald Welte <lafo...@gnumonks.org>
Gerrit-Reviewer: Harald Welte <lafo...@gnumonks.org>
Gerrit-Reviewer: Jenkins Builder
Gerrit-MessageType: merged
