asn1helpers: Fix 24 bit conversion function and use it in hnbgw_hnbap

The 32 bit int needs to be shifted left one byte so the correct bytes
end up at the beginning of the bit string buffer.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/hnbgw_hnbap.c b/src/hnbgw_hnbap.c
index 97cb32b..b74cdad 100644
--- a/src/hnbgw_hnbap.c
+++ b/src/hnbgw_hnbap.c
@@ -79,6 +79,7 @@ static int hnbgw_tx_ue_register_acc(struct ue_context *ue)
 	UERegisterAcceptIEs_t accept;
 	struct msgb *msg;
 	uint8_t encoded_imsi[10];
+	uint32_t ctx_id;
 	size_t encoded_imsi_len;
 	int rc;
 
@@ -89,8 +90,7 @@ static int hnbgw_tx_ue_register_acc(struct ue_context *ue)
 	accept.uE_Identity.present = UE_Identity_PR_iMSI;
 	OCTET_STRING_fromBuf(&accept.uE_Identity.choice.iMSI,
 			     (const char *)encoded_imsi, encoded_imsi_len);
-	asn1_u32_to_bitstring(&accept.context_ID, &ue->context_id);
-	accept.context_ID.size = 3;	/* 24bit field */
+	asn1_u24_to_bitstring(&accept.context_ID, &ctx_id, ue->context_id);
 
 	memset(&accept_out, 0, sizeof(accept_out));
 	rc = hnbap_encode_ueregisteraccepties(&accept_out, &accept);