[nat] Send a GSM48 message within the reject message
diff --git a/openbsc/src/nat/bsc_nat.c b/openbsc/src/nat/bsc_nat.c
index 4b9ea65..9e6bd2b 100644
--- a/openbsc/src/nat/bsc_nat.c
+++ b/openbsc/src/nat/bsc_nat.c
@@ -44,6 +44,7 @@
#include <openbsc/abis_nm.h>
#include <openbsc/telnet_interface.h>
+#include <osmocore/gsm0808.h>
#include <osmocore/talloc.h>
#include <vty/vty.h>
@@ -297,8 +298,25 @@
static void bsc_send_con_refuse(struct bsc_connection *bsc,
struct bsc_nat_parsed *parsed, int con_type)
{
+ struct msgb *payload;
struct msgb *refuse;
- refuse = sccp_create_refuse(parsed->src_local_ref, SCCP_REFUSAL_SCCP_FAILURE, NULL, 0);
+
+ if (con_type == NAT_CON_TYPE_LU) {
+ payload = gsm48_create_loc_upd_rej(GSM48_REJECT_PLMN_NOT_ALLOWED);
+ gsm0808_prepend_dtap_header(payload, 0);
+ } else if (con_type == NAT_CON_TYPE_CM_SERV_REQ) {
+ payload = gsm48_create_mm_serv_rej(GSM48_REJECT_PLMN_NOT_ALLOWED);
+ gsm0808_prepend_dtap_header(payload, 0);
+ }
+
+ refuse = sccp_create_refuse(parsed->src_local_ref,
+ SCCP_REFUSAL_SCCP_FAILURE,
+ payload ? payload->data : NULL,
+ payload ? payload->len : 0);
+
+ if (payload)
+ msgb_free(payload);
+
if (!refuse) {
LOGP(DNAT, LOGL_ERROR,
"Creating refuse msg failed for SCCP 0x%x on BSC Nr: %d.\n",