Change in ...osmo-bts[master]: common/rsl.c: RSL_IE_HANDO_REF is mandatory for handover CHAN ACT

Vadim Yanitskiy gerrit-no-reply at lists.osmocom.org
Sat Jun 1 19:09:47 UTC 2019


Vadim Yanitskiy has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-bts/+/14324


Change subject: common/rsl.c: RSL_IE_HANDO_REF is mandatory for handover CHAN ACT
......................................................................

common/rsl.c: RSL_IE_HANDO_REF is mandatory for handover CHAN ACT

According to 3GPP TS 48.058, section 8.4.1, the Handover Reference
element must be included if channel activation type is 'handover'.
Let's properly reject CHANnel ACTivation messages with missing
RSL_IE_HANDO_REF. Otherwise such requests are misinterpreted
as regular (non-handover) channel requests.

Found using TC_ho_rach() TTCN-3 test case.

Change-Id: I9c50e1dbeb54c5470560adcdfb2bdf5abbe47993
---
M src/common/rsl.c
1 file changed, 7 insertions(+), 3 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-bts refs/changes/24/14324/1

diff --git a/src/common/rsl.c b/src/common/rsl.c
index b96182f..410b38a 100644
--- a/src/common/rsl.c
+++ b/src/common/rsl.c
@@ -1090,9 +1090,13 @@
 		memset(&lchan->encr, 0, sizeof(lchan->encr));
 
 	/* 9.3.9 Handover Reference */
-	if ((type == RSL_ACT_INTER_ASYNC ||
-	     type == RSL_ACT_INTER_SYNC) &&
-	    TLVP_PRES_LEN(&tp, RSL_IE_HANDO_REF, 1)) {
+	if ((type == RSL_ACT_INTER_ASYNC || type == RSL_ACT_INTER_SYNC)) {
+		/* According to 8.4.1, the Handover Reference element is included
+		 * if activation type is handover. Assuming it's mandatory. */
+		if (!TLVP_PRES_LEN(&tp, RSL_IE_HANDO_REF, 1)) {
+			LOGPLCHAN(lchan, DRSL, LOGL_NOTICE, "Missing Handover Reference IE\n");
+			return rsl_tx_chan_act_nack(lchan, RSL_ERR_MAND_IE_ERROR);
+		}
 		lchan->ho.active = HANDOVER_ENABLED;
 		lchan->ho.ref = *TLVP_VAL(&tp, RSL_IE_HANDO_REF);
 	}

-- 
To view, visit https://gerrit.osmocom.org/c/osmo-bts/+/14324
To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings

Gerrit-Project: osmo-bts
Gerrit-Branch: master
Gerrit-Change-Id: I9c50e1dbeb54c5470560adcdfb2bdf5abbe47993
Gerrit-Change-Number: 14324
Gerrit-PatchSet: 1
Gerrit-Owner: Vadim Yanitskiy <axilirator at gmail.com>
Gerrit-MessageType: newchange
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osmocom.org/pipermail/gerrit-log/attachments/20190601/eb791dc4/attachment.html>


More information about the gerrit-log mailing list