HNBAP: Send HNB-REGISTER-REJ on ASN.1 decoding error

Change-Id: Ic4a40966194a57cccc0eb056233f7e7426d6e8f9
---
M src/osmo-hnbgw/hnbgw_hnbap.c
1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/osmo-hnbgw/hnbgw_hnbap.c b/src/osmo-hnbgw/hnbgw_hnbap.c
index 5cca3cb..9ffb0ba 100644
--- a/src/osmo-hnbgw/hnbgw_hnbap.c
+++ b/src/osmo-hnbgw/hnbgw_hnbap.c
@@ -422,7 +422,9 @@
 	rc = hnbap_decode_hnbregisterrequesties(&ies, in);
 	if (rc < 0) {
 		LOGHNB(ctx, DHNBAP, LOGL_ERROR, "Failure to decode HNB-REGISTER-REQ: rc=%d\n", rc);
-		return rc;
+		cause.present = HNBAP_Cause_PR_protocol;
+		cause.choice.radioNetwork = HNBAP_CauseProtocol_unspecified;
+		return hnbgw_tx_hnb_register_rej(ctx, &cause);
 	}
 	asn1_strncpy(identity_str, &ies.hnB_Identity.hNB_Identity_Info, sizeof(identity_str));
 

