ussd: Add the hook where we can capture the Location Updating Request

3 files changed, 23 insertions, 0 deletions

diff --git a/include/bsc_ussd.h b/include/bsc_ussd.h
index 57eb4d4..69ad93c 100644
--- a/include/bsc_ussd.h
+++ b/include/bsc_ussd.h
@@ -22,4 +22,6 @@
 #ifndef bsc_ussd_h
 #define bsc_ussd_h
 
+int bsc_ussd_handle_out_msg(struct bsc_data *bsc, struct sccp_parse_result *result, struct msgb *msg);
+
 #endif
diff --git a/src/bsc_ussd.c b/src/bsc_ussd.c
index 42d41c4..5c7e962 100644
--- a/src/bsc_ussd.c
+++ b/src/bsc_ussd.c
@@ -21,3 +21,19 @@
  */
 
 #include <bsc_data.h>
+
+/*
+ * Check the msg and identify a Location Updating Request and see if the
+ * LAC is different to this one and then mark the CR message.
+ */
+int bsc_ussd_handle_out_msg(struct bsc_data *bsc, struct sccp_parse_result *result,
+			    struct msgb *msg)
+{
+	/* Only search for this in the CR message */
+	if (sccp_determine_msg_type(msg) != SCCP_MSG_TYPE_CR)
+		return 0;
+
+	/* now check the kind of GSM message */
+
+	return 0;
+}
diff --git a/src/msc_conn.c b/src/msc_conn.c
index 902546f..b03dc5f 100644
--- a/src/msc_conn.c
+++ b/src/msc_conn.c
@@ -21,6 +21,7 @@
  */
 
 #include <bsc_data.h>
+#include <bsc_ussd.h>
 #include <bss_patch.h>
 #include <bssap_sccp.h>
 #include <ipaccess.h>
@@ -203,6 +204,8 @@ static int ipaccess_a_fd_cb(struct bsc_fd *bfd)
 			update_con_state(rc, &result, msg, 1, 0);
 			sls = sls_for_src_ref(result.destination_local_reference);
 
+			/* Check for Location Update Accept */
+
 			/* patch a possible PC */
 			bss_rewrite_header_to_bsc(msg, link->opc, link->dpc);
 
@@ -593,6 +596,8 @@ void msc_send_msg(struct bsc_data *bsc, int rc, struct sccp_parse_result *result
 		return;
 	}
 
+	bsc_ussd_handle_out_msg(bsc, result, _msg);
+
 	msg = msgb_alloc_headroom(4096, 128, "SCCP to MSC");
 	if (!msg) {
 		LOGP(DMSC, LOGL_ERROR, "Failed to alloc MSC msg.\n");