bsc: Use the BSC Filter to stop a paging_request
diff --git a/openbsc/src/bsc/osmo_bsc_filter.c b/openbsc/src/bsc/osmo_bsc_filter.c
index 24710fa..edd1b0d 100644
--- a/openbsc/src/bsc/osmo_bsc_filter.c
+++ b/openbsc/src/bsc/osmo_bsc_filter.c
@@ -21,7 +21,11 @@
#include <openbsc/osmo_bsc.h>
#include <openbsc/osmo_msc_data.h>
#include <openbsc/gsm_04_80.h>
+#include <openbsc/gsm_subscriber.h>
#include <openbsc/debug.h>
+#include <openbsc/paging.h>
+
+#include <stdlib.h>
static void handle_lu_request(struct gsm_subscriber_connection *conn,
struct msgb *msg)
@@ -50,6 +54,48 @@
}
}
+/* we will need to stop the paging request */
+static int handle_page_resp(struct gsm_subscriber_connection *conn, struct msgb *msg)
+{
+ uint8_t mi_type;
+ char mi_string[GSM48_MI_SIZE];
+ struct gsm48_hdr *gh;
+ struct gsm48_pag_resp *resp;
+ struct gsm_subscriber *subscr;
+
+ if (msgb_l3len(msg) < sizeof(*gh) + sizeof(*resp)) {
+ LOGP(DMSC, LOGL_ERROR, "PagingResponse too small: %u\n", msgb_l3len(msg));
+ return -1;
+ }
+
+ gh = msgb_l3(msg);
+ resp = (struct gsm48_pag_resp *) &gh->data[0];
+
+ gsm48_paging_extract_mi(resp, msgb_l3len(msg) - sizeof(*gh),
+ mi_string, &mi_type);
+ DEBUGP(DRR, "PAGING RESPONSE: mi_type=0x%02x MI(%s)\n",
+ mi_type, mi_string);
+
+ switch (mi_type) {
+ case GSM_MI_TYPE_TMSI:
+ subscr = subscr_active_by_tmsi(conn->bts->network,
+ tmsi_from_string(mi_string));
+ break;
+ case GSM_MI_TYPE_IMSI:
+ subscr = subscr_active_by_imsi(conn->bts->network, mi_string);
+ break;
+ }
+
+ if (!subscr) {
+ LOGP(DMSC, LOGL_ERROR, "Non active subscriber got paged.\n");
+ return -1;
+ }
+
+ paging_request_stop(conn->bts, subscr, conn);
+ subscr_put(subscr);
+ return 0;
+}
+
/**
* This is used to scan a message for extra functionality of the BSC. This
* includes scanning for location updating requests/acceptd and then send
@@ -64,6 +110,9 @@
if (pdisc == GSM48_PDISC_MM) {
if (mtype == GSM48_MT_MM_LOC_UPD_REQUEST)
handle_lu_request(conn, msg);
+ } else if (pdisc == GSM48_PDISC_RR) {
+ if (mtype == GSM48_MT_RR_PAG_RESP)
+ handle_page_resp(conn, msg);
}
return 0;