Change in ...osmo-ttcn3-hacks[master]: bts: Add test csse for I frame with wrong C/R value

[Harald Welte]

Harald Welte has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/14350


Change subject: bts: Add test csse for I frame with wrong C/R value
......................................................................

bts: Add test csse for I frame with wrong C/R value

Implemented as BTS_Tests_LAPDm.TC_incorrect_cr()

Change-Id: I19e50049625bd31662a1e22b1394b69b2d249104
---
M bts/BTS_Tests_LAPDm.ttcn
1 file changed, 54 insertions(+), 0 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks refs/changes/50/14350/1

diff --git a/bts/BTS_Tests_LAPDm.ttcn b/bts/BTS_Tests_LAPDm.ttcn
index 218804e..f57b052 100644
--- a/bts/BTS_Tests_LAPDm.ttcn
+++ b/bts/BTS_Tests_LAPDm.ttcn
@@ -1001,6 +1001,59 @@
 	f_testmatrix_each_chan(pars, refers(f_TC_rr_response_frame_loss));
 }
 
+/* Ensure BTS ignores I frames with wrong C/R bit; Inspired by TS 51.010-1 25.2.5.1 */
+private function f_TC_incorrect_cr(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;
+	}
+	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;
+
+	f_establish_mo(link_id);
+
+	var octetstring l3_mo := f_rnd_octstring(10);
+	/* Send an I frame to the BTS: SAPI = 0, C = 0, P = 1, M = 0, L = 3, N(S) = 0, N(R) = 0 */
+	LAPDM.send(t_PH_DATA(0, is_sacch, ts_LAPDm_I(sapi, c_r:=cr_MO_RSP, p:=true, nr:=0, ns:=0,
+						     l3:=l3_mo)));
+	T.start;
+	alt {
+	[] RSL.receive(tr_RSL_DATA_IND(g_chan_nr, link_id, l3_mo)) {
+		setverdict(fail, "BTS didn't ignore I frame with wrong C/R bit");
+		}
+	[] RSL.receive(tr_RSL_ERROR_IND(g_chan_nr, link_id, '0C'O)) {
+		repeat;
+		}
+	/* ensure BTS still sends idle frames */
+	[] as_lapdm_idle() {
+		setverdict(pass, "still sending idle frames");
+		}
+	[] T.timeout {}
+	}
+
+	/* Send RR command P=1 */
+	LAPDM.send(t_PH_DATA(0, is_sacch, ts_LAPDm_RR(sapi, c_r:=cr_MO_CMD, p:=true, nr:=0)));
+
+	/* The BTS shall respond with a RR response, F bit set to 1. */
+	LAPDM.receive(t_PH_DATA(0, is_sacch, tr_LAPDm_RR(sapi, c_r:=cr_MT_RSP, p:=true, nr:=0)));
+
+	deactivate(d);
+
+	fp_common_fini();
+}
+testcase TC_incorrect_cr() 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_incorrect_cr));
+}
 control {
 	execute(TC_foo());
 	execute(TC_sabm_ua_dcch_sapi0());
@@ -1019,6 +1072,7 @@
 	execute(TC_segm_concat_sacch());
 	execute(TC_t200_n200());
 	execute(TC_rr_response_frame_loss());
+	execute(TC_incorrect_cr());
 }
 
 }

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Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-Change-Id: I19e50049625bd31662a1e22b1394b69b2d249104
Gerrit-Change-Number: 14350
Gerrit-PatchSet: 1
Gerrit-Owner: Harald Welte <laforge at gnumonks.org>
Gerrit-MessageType: newchange
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