nat: Introduce a new connection type for Supplementary Services
If we have a CM Service Request we will look into the message
to see if it is a Supplementary Service Activation.
diff --git a/openbsc/src/nat/bsc_nat_utils.c b/openbsc/src/nat/bsc_nat_utils.c
index dc18cff..f88e766 100644
--- a/openbsc/src/nat/bsc_nat_utils.c
+++ b/openbsc/src/nat/bsc_nat_utils.c
@@ -54,6 +54,7 @@
[BCFG_CTR_CON_TYPE_LU] = { "conn.lu", "Conn Location Update "},
[BCFG_CTR_CON_CMSERV_RQ] = { "conn.rq", "Conn CM Service Req "},
[BCFG_CTR_CON_PAG_RESP] = { "conn.pag", "Conn Paging Response "},
+ [BCFG_CTR_CON_SSA] = { "conn.ssa", "Conn USSD "},
[BCFG_CTR_CON_OTHER] = { "conn.other", "Conn Other "},
};
@@ -391,7 +392,7 @@
static int _cr_check_cm_serv_req(struct bsc_connection *bsc,
uint8_t *data, unsigned int length,
- char **imsi)
+ int *con_type, char **imsi)
{
static const uint32_t classmark_offset =
offsetof(struct gsm48_service_request, classmark);
@@ -410,6 +411,8 @@
}
req = (struct gsm48_service_request *) data;
+ if (req->cm_service_type == 0x8)
+ *con_type = NAT_CON_TYPE_SSA;
rc = gsm48_extract_mi((uint8_t *) &req->classmark,
length - classmark_offset, mi_string, &mi_type);
if (rc < 0) {
@@ -537,7 +540,9 @@
} else if (hdr48->proto_discr == GSM48_PDISC_MM &&
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), imsi);
+ return _cr_check_cm_serv_req(bsc, &hdr48->data[0],
+ hdr48_len - sizeof(*hdr48),
+ con_type, imsi);
} else if (hdr48->proto_discr == GSM48_PDISC_RR &&
msg_type == GSM48_MT_RR_PAG_RESP) {
*con_type = NAT_CON_TYPE_PAG_RESP;
@@ -614,6 +619,7 @@
[NAT_CON_TYPE_LU] = "Location Update",
[NAT_CON_TYPE_CM_SERV_REQ] = "CM Serv Req",
[NAT_CON_TYPE_PAG_RESP] = "Paging Response",
+ [NAT_CON_TYPE_SSA] = "Supplementar Service Activation",
[NAT_CON_TYPE_LOCAL_REJECT] = "Local Reject",
[NAT_CON_TYPE_OTHER] = "Other",
};
@@ -693,6 +699,7 @@
[NAT_CON_TYPE_LU] = BCFG_CTR_CON_TYPE_LU,
[NAT_CON_TYPE_CM_SERV_REQ] = BCFG_CTR_CON_CMSERV_RQ,
[NAT_CON_TYPE_PAG_RESP] = BCFG_CTR_CON_PAG_RESP,
+ [NAT_CON_TYPE_SSA] = BCFG_CTR_CON_SSA,
[NAT_CON_TYPE_LOCAL_REJECT] = -1,
[NAT_CON_TYPE_OTHER] = BCFG_CTR_CON_OTHER,
};