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sbcap: Add Concurrent-Warning-Message-Indicator IE to Write-Replace-Req

3GPP TS 23.041 9.3.32 states that the IE is always present for non-ETWS
messages and never present in ETWS messages.

Related: OS#4945
Change-Id: I4a5ac56b7e6eeb85aee07ae2ddf10fa2afbbf4ef
---
M src/sbcap_msg.c
1 file changed, 8 insertions(+), 0 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-cbc refs/changes/97/28897/1

diff --git a/src/sbcap_msg.c b/src/sbcap_msg.c
index 1c0e768..f9fa70a 100644
--- a/src/sbcap_msg.c
+++ b/src/sbcap_msg.c
@@ -223,6 +223,14 @@
 			ptr++;
 		}
 		ASN_SEQUENCE_ADD(as_pdu, ie);
+
+		/* Concurrent Warning Message Indicator
+		 * 3GPP TS 36.413 8.12.1.2 and 9.2.1.72, 3GPP TS 23.041 9.3.32
+		 * static const long asn_VAL_13_SBcAP_id_Concurrent_Warning_Message_Indicator = 20; */
+		ie = sbcap_alloc_Write_Replace_Warning_Request_IE(20, SBcAP_Criticality_reject,
+			SBcAP_Write_Replace_Warning_Request_IEs__value_PR_Concurrent_Warning_Message_Indicator);
+		ie->value.choice.Concurrent_Warning_Message_Indicator = SBcAP_Concurrent_Warning_Message_Indicator_true;
+		ASN_SEQUENCE_ADD(as_pdu, ie);
 	}
 
 	/* Send Write-Replace-Warning-Indication

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