Change in osmo-ttcn3-hacks[master]: bsc: handle RR Release messages

Neels Hofmeyr gerrit-no-reply at
Wed Nov 14 16:17:40 UTC 2018

Neels Hofmeyr has submitted this change and it was merged. ( )

Change subject: bsc: handle RR Release messages

bsc: handle RR Release messages

Receive RR Release messages if they happen during lchan release. Add RR Release
to the alt{}s in both f_expect_chan_rel() to cover a whole bunch of test cases,
and in f_tc_ho_out_fail_no_ho_detect() which has its own release expectations.

Before this, RR Release messages would typically be lost in the RSL.clear
recently removed by Ie1be30c3f109dda8c58c523df508211f8e20aad3.

However, I still expect tests to pass after this, since the current osmo-bsc
master has a bug that omits RR Release messages (since [1]).

By applying this patch, both the buggy osmo-bsc (omitting RR Release) and the
fix of that [2] should pass the BSC tests. So far by accepting whatever comes
along, and not complaining if it doesn't come along.

A subsequent patch will more precisely ensure that exactly the expected
messages will be sent by osmo-bsc (Ibc64058f1e214bea585f4e8dcb66f3df8ead3845).

[1] osmo-bsc I4fd582b41ba4599af704d670af83651d2450b1db
    commit 8b818a01b00ea3daad4ad58c162ac52b4f08a5cb
    "subscr conn: properly forget lchan before release"

[2] osmo-bsc I666b3b4f45706d898d664d380bd0fd2b018be358
    "fix: send RR Release (e.g. after BSSMAP Clear Cmd"

Related: OS#3413
Change-Id: I4e6d266d091b140f56b28312cb3c5d67ffcc3a59
M bsc/BSC_Tests.ttcn
1 file changed, 8 insertions(+), 0 deletions(-)

  Harald Welte: Looks good to me, approved
  Jenkins Builder: Verified

diff --git a/bsc/BSC_Tests.ttcn b/bsc/BSC_Tests.ttcn
index a2a3378..fcccad0 100644
--- a/bsc/BSC_Tests.ttcn
+++ b/bsc/BSC_Tests.ttcn
@@ -820,12 +820,16 @@
 			   boolean handle_rll_rel := true) runs on test_CT {
 	var RslLinkId main_dcch := valueof(ts_RslLinkID_DCCH(0));
+	var octetstring l3_rr_chan_rel := '060D00'O;
 	alt {
 	/* ignore DEACTIVATE SACCH (if any) */
 	[] IPA_RSL[bts_nr].receive(tr_ASP_RSL_UD(IPAC_PROTO_RSL_TRX0,
 					tr_RSL_DEACT_SACCH(rsl_chan_nr))) {
+	[] IPA_RSL[bts_nr].receive(tr_ASP_RSL_UD(IPAC_PROTO_RSL_TRX0, tr_RSL_DATA_REQ(rsl_chan_nr, ?, l3_rr_chan_rel))) {
+		repeat;
+	}
 	/* acknowledge RLL release (if any)*/
 	[handle_rll_rel] IPA_RSL[bts_nr].receive(tr_ASP_RSL_UD(IPAC_PROTO_RSL_TRX0,
 					tr_RSL_REL_REQ(rsl_chan_nr, ?))) {
@@ -2441,7 +2445,11 @@
 	 * RR should be released and Clear Request should go to the MSC. */
 	var MgcpCommand mgcp;
+	var octetstring l3_rr_chan_rel := '060D00'O;
 	interleave {
+	[] RSL.receive(tr_RSL_DATA_REQ(g_chan_nr, ?, l3_rr_chan_rel)) {
+			log("Got RR Release");
+		}
 	[] RSL.receive(tr_RSL_MsgTypeD(RSL_MT_RF_CHAN_REL)) {
 			log("Got RF Chan Rel");

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Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-MessageType: merged
Gerrit-Change-Id: I4e6d266d091b140f56b28312cb3c5d67ffcc3a59
Gerrit-Change-Number: 11660
Gerrit-PatchSet: 2
Gerrit-Owner: Neels Hofmeyr <nhofmeyr at>
Gerrit-Reviewer: Harald Welte <laforge at>
Gerrit-Reviewer: Jenkins Builder (1000002)
Gerrit-Reviewer: Neels Hofmeyr <nhofmeyr at>
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