From d65305f5b45780dbcc1bb7dda9161a1995d98125 Mon Sep 17 00:00:00 2001 From: Holger Hans Peter Freyther Date: Fri, 5 Nov 2010 11:31:08 +0100 Subject: 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. --- openbsc/src/bsc/osmo_bsc_filter.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) (limited to 'openbsc/src/bsc/osmo_bsc_filter.c') diff --git a/openbsc/src/bsc/osmo_bsc_filter.c b/openbsc/src/bsc/osmo_bsc_filter.c index 1aeaa951e..7052cfea1 100644 --- a/openbsc/src/bsc/osmo_bsc_filter.c +++ b/openbsc/src/bsc/osmo_bsc_filter.c @@ -19,6 +19,34 @@ */ #include +#include + +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; } -- cgit v1.2.3