bsc: Allow to use different LAC/CI for the core-network
We need to use different LAC/CI towards the core network.
It is a bit problematic as LAC/CI is a per BTS attribute
so this feature only works if a BSC manages everything in
the same LAC.
Related: SYS#1398
diff --git a/openbsc/src/osmo-bsc/osmo_bsc_api.c b/openbsc/src/osmo-bsc/osmo_bsc_api.c
index 2c661b3..18b9607 100644
--- a/openbsc/src/osmo-bsc/osmo_bsc_api.c
+++ b/openbsc/src/osmo-bsc/osmo_bsc_api.c
@@ -65,6 +65,21 @@
return msc->network->country_code;
}
+static uint16_t get_lac_for_msc(struct osmo_msc_data *msc, struct gsm_bts *bts)
+{
+ if (msc->core_lac != -1)
+ return msc->core_lac;
+ return bts->location_area_code;
+}
+
+static uint16_t get_ci_for_msc(struct osmo_msc_data *msc, struct gsm_bts *bts)
+{
+ if (msc->core_ci != -1)
+ return msc->core_ci;
+ return bts->cell_identity;
+}
+
+
static void bsc_sapi_n_reject(struct gsm_subscriber_connection *conn, int dlci)
{
struct msgb *resp;
@@ -161,6 +176,8 @@
struct msgb *resp;
uint16_t network_code;
uint16_t country_code;
+ uint16_t lac;
+ uint16_t ci;
enum bsc_con ret;
int send_ping = msc->advanced_ping;
@@ -189,11 +206,11 @@
network_code = get_network_code_for_msc(conn->sccp_con->msc);
country_code = get_country_code_for_msc(conn->sccp_con->msc);
+ lac = get_lac_for_msc(conn->sccp_con->msc, conn->bts);
+ ci = get_ci_for_msc(conn->sccp_con->msc, conn->bts);
bsc_scan_bts_msg(conn, msg);
- resp = gsm0808_create_layer3(msg, network_code, country_code,
- conn->bts->location_area_code,
- conn->bts->cell_identity);
+ resp = gsm0808_create_layer3(msg, network_code, country_code, lac, ci);
if (!resp) {
LOGP(DMSC, LOGL_DEBUG, "Failed to create layer3 message.\n");
sccp_connection_free(conn->sccp_con->sccp);