2 files changed, 17 insertions, 1 deletions
diff --git a/lib/if.c b/lib/if.c
index 70c0c18141..6766a04b37 100644
--- a/lib/if.c
+++ b/lib/if.c
@@ -564,9 +564,24 @@ size_t if_lookup_by_hwaddr(const uint8_t *hw_addr, size_t addrsz,
 	return count;
 }
 
+/* Get the VRF loopback interface, i.e. the loopback on the default VRF
+ * or the VRF interface.
+ */
+struct interface *if_get_vrf_loopback(vrf_id_t vrf_id)
+{
+	struct interface *ifp = NULL;
+	struct vrf *vrf = vrf_lookup_by_id(vrf_id);
+
+	FOR_ALL_INTERFACES (vrf, ifp)
+		if (if_is_loopback(ifp))
+			return ifp;
+
+	return NULL;
+}
 
 /* Get interface by name if given name interface doesn't exist create
-   one. */
+ * one.
+ */
 struct interface *if_get_by_name(const char *name, vrf_id_t vrf_id,
 				 const char *vrf_name)
 {
diff --git a/lib/if.h b/lib/if.h
index 91dcd46247..a653246ccb 100644
--- a/lib/if.h
+++ b/lib/if.h
@@ -532,6 +532,7 @@ static inline bool if_address_is_local(const void *matchaddr, int family,
 struct vrf;
 extern struct interface *if_lookup_by_name_vrf(const char *name, struct vrf *vrf);
 extern struct interface *if_lookup_by_name(const char *ifname, vrf_id_t vrf_id);
+extern struct interface *if_get_vrf_loopback(vrf_id_t vrf_id);
 extern struct interface *if_get_by_name(const char *ifname, vrf_id_t vrf_id,
 					const char *vrf_name);