[nat] Set the connection type/reason as out parameter
We are analyzing each CR message and it is nice to know the
reason these connections were created. Change the nat method.
diff --git a/openbsc/src/nat/bsc_nat_utils.c b/openbsc/src/nat/bsc_nat_utils.c
index 18fac0c..616e52f 100644
--- a/openbsc/src/nat/bsc_nat_utils.c
+++ b/openbsc/src/nat/bsc_nat_utils.c
@@ -315,13 +315,15 @@
}
/* Filter out CR data... */
-int bsc_nat_filter_sccp_cr(struct bsc_connection *bsc, struct msgb *msg, struct bsc_nat_parsed *parsed)
+int bsc_nat_filter_sccp_cr(struct bsc_connection *bsc, struct msgb *msg, struct bsc_nat_parsed *parsed, int *con_type)
{
struct tlv_parsed tp;
struct gsm48_hdr *hdr48;
int hdr48_len;
int len;
+ *con_type = NAT_CON_TYPE_NONE;
+
if (parsed->gsm_type != BSS_MAP_MSG_COMPLETE_LAYER_3) {
LOGP(DNAT, LOGL_ERROR,
"Rejecting CR message due wrong GSM Type %d\n", parsed->gsm_type);
@@ -357,15 +359,19 @@
if (hdr48->proto_discr == GSM48_PDISC_MM &&
hdr48->msg_type == GSM48_MT_MM_LOC_UPD_REQUEST) {
+ *con_type = NAT_CON_TYPE_LU;
return _cr_check_loc_upd(bsc, &hdr48->data[0], hdr48_len - sizeof(*hdr48));
} else if (hdr48->proto_discr == GSM48_PDISC_MM &&
hdr48->msg_type == GSM48_MT_MM_CM_SERV_REQ) {
+ *con_type = NAT_CON_TYPE_CM_SERV_REQ;
return _cr_check_cm_serv_req(bsc, &hdr48->data[0], hdr48_len - sizeof(*hdr48));
} else if (hdr48->proto_discr == GSM48_PDISC_RR &&
hdr48->msg_type == GSM48_MT_RR_PAG_RESP) {
+ *con_type = NAT_CON_TYPE_PAG_RESP;
return _cr_check_pag_resp(bsc, &hdr48->data[0], hdr48_len - sizeof(*hdr48));
} else {
/* We only want to filter the above, let other things pass */
+ *con_type = NAT_CON_TYPE_OTHER;
return 0;
}
}