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osmo-bsc
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bsc: Look for location updating requests in messages 

Introduce the SCCP connection data and remember that
we were seeing a location updating request from a
different LAC.
This commit is contained in:
Holger Hans Peter Freyther 2010-11-05 11:31:08 +01:00
parent 5bb874d2f5
commit d65305f5b4
2 changed files with 41 additions and 0 deletions
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4
openbsc/include/openbsc/osmo_bsc.h
View File

@ -5,6 +5,10 @@
#include "bsc_api.h"
struct osmo_bsc_sccp_con {
uint8_t new_subscriber;
};
struct bsc_api *osmo_bsc_api();
int bsc_queue_for_msc(struct gsm_subscriber_connection *conn, struct msgb *msg);

37
openbsc/src/bsc/osmo_bsc_filter.c
View File

@ -19,6 +19,34 @@
*/
#include <openbsc/osmo_bsc.h>
#include <openbsc/debug.h>
static void handle_lu_request(struct gsm_subscriber_connection *conn,
struct msgb *msg)
{
struct gsm48_hdr *gh;
struct gsm48_loc_upd_req *lu;
struct gsm48_loc_area_id lai;
struct gsm_network *net;
if (msgb_l3len(msg) < sizeof(*gh) + sizeof(*lu)) {
LOGP(DMSC, LOGL_ERROR, "LU too small to look at: %u\n", msgb_l3len(msg));
return;
}
net = conn->bts->network;
gh = msgb_l3(msg);
lu = (struct gsm48_loc_upd_req *) gh->data;
gsm48_generate_lai(&lai, net->country_code, net->network_code,
conn->bts->location_area_code);
if (memcmp(&lai, &lu->lai, sizeof(lai)) != 0) {
LOGP(DMSC, LOGL_DEBUG, "Marking con for welcome USSD.\n");
conn->sccp_con->new_subscriber = 1;
}
}
/**
* This is used to scan a message for extra functionality of the BSC. This
@ -27,5 +55,14 @@
*/
int bsc_scan_bts_msg(struct gsm_subscriber_connection *conn, struct msgb *msg)
{
struct gsm48_hdr *gh = msgb_l3(msg);
uint8_t pdisc = gh->proto_discr & 0x0f;
uint8_t mtype = gh->msg_type & 0xbf;
if (pdisc == GSM48_PDISC_MM) {
if (mtype == GSM48_MT_MM_LOC_UPD_REQUEST)
handle_lu_request(conn, msg);
}
return 0;
}