diff --git a/src/gsup_router.h b/src/gsup_router.h
index 282531d..bff484e 100644
--- a/src/gsup_router.h
+++ b/src/gsup_router.h
@@ -3,9 +3,18 @@
 #include <stdint.h>
 #include "gsup_server.h"
 
+struct gsup_route {
+	struct llist_head list;
+
+	uint8_t *addr;
+	struct osmo_gsup_conn *conn;
+};
+
 struct osmo_gsup_conn *gsup_route_find(struct osmo_gsup_server *gs,
 					const uint8_t *addr, size_t addrlen);
 
+struct gsup_route *gsup_route_find_by_conn(const struct osmo_gsup_conn *conn);
+
 /* add a new route for the given address to the given conn */
 int gsup_route_add(struct osmo_gsup_conn *conn, const uint8_t *addr, size_t addrlen);