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osmo-msc
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bsc: Implement scanning and changing messages from the MSC 

This will change the LAI of a LU accept message to the LAI
used for the on-air network. It will also detect when to
send a welcome ussd to the subscriber.
This commit is contained in:
Holger Hans Peter Freyther 2010-11-05 18:41:04 +01:00
parent a54732d19d
commit 52d42abdb7
2 changed files with 45 additions and 0 deletions
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3
openbsc/include/openbsc/osmo_msc_data.h
View File

@ -61,6 +61,9 @@ struct osmo_msc_data {
/* rf ctl related bits */
char *ussd_grace_txt;
struct osmo_bsc_rf *rf_ctl;
/* ussd welcome text */
char *ussd_welcome_txt;
};
int osmo_bsc_msc_init(struct gsm_network *network);

42
openbsc/src/bsc/osmo_bsc_filter.c
View File

@ -19,6 +19,8 @@
*/
#include <openbsc/osmo_bsc.h>
#include <openbsc/osmo_msc_data.h>
#include <openbsc/gsm_04_80.h>
#include <openbsc/debug.h>
static void handle_lu_request(struct gsm_subscriber_connection *conn,
@ -67,10 +69,50 @@ int bsc_scan_bts_msg(struct gsm_subscriber_connection *conn, struct msgb *msg)
return 0;
}
static void send_welcome_ussd(struct gsm_subscriber_connection *conn)
{
struct gsm_network *net;
net = conn->bts->network;
if (!net->msc_data->ussd_welcome_txt)
return;
gsm0480_send_ussdNotify(conn, 1, net->msc_data->ussd_welcome_txt);
gsm0480_send_releaseComplete(conn);
}
/**
* Messages coming back from the MSC.
*/
int bsc_scan_msc_msg(struct gsm_subscriber_connection *conn, struct msgb *msg)
{
struct gsm_network *net;
struct gsm48_loc_area_id *lai;
struct gsm48_hdr *gh;
uint8_t mtype;
if (msgb_l3len(msg) < sizeof(*gh)) {
LOGP(DMSC, LOGL_ERROR, "GSM48 header does not fit.\n");
return -1;
}
gh = (struct gsm48_hdr *) msgb_l3(msg);
mtype = gh->msg_type & 0xbf;
net = conn->bts->network;
if (mtype == GSM48_MT_MM_LOC_UPD_ACCEPT) {
if (net->msc_data->core_ncc != -1) {
if (msgb_l3len(msg) >= sizeof(*gh) + sizeof(*lai)) {
lai = (struct gsm48_loc_area_id *) &gh->data[0];
gsm48_generate_lai(lai, net->country_code,
net->network_code,
conn->bts->location_area_code);
}
}
if (conn->sccp_con->new_subscriber)
send_welcome_ussd(conn);
}
return 0;
}