network: tunnel: introduce TUNNEL() helper function

2021-12-08 01:54:01 +09:00
parent 9e29133085
commit fbe0139f1a
2 changed files with 38 additions and 38 deletions
@@ -74,6 +74,36 @@ DEFINE_NETDEV_CAST(VTI, Tunnel);
 DEFINE_NETDEV_CAST(VTI6, Tunnel);
 DEFINE_NETDEV_CAST(IP6TNL, Tunnel);
 DEFINE_NETDEV_CAST(ERSPAN, Tunnel);
+
+static inline Tunnel* TUNNEL(NetDev *netdev) {
+        assert(netdev);
+
+        switch (netdev->kind) {
+        case NETDEV_KIND_IPIP:
+                return IPIP(netdev);
+        case NETDEV_KIND_SIT:
+                return SIT(netdev);
+        case NETDEV_KIND_GRE:
+                return GRE(netdev);
+        case NETDEV_KIND_GRETAP:
+                return GRETAP(netdev);
+        case NETDEV_KIND_IP6GRE:
+                return IP6GRE(netdev);
+        case NETDEV_KIND_IP6GRETAP:
+                return IP6GRETAP(netdev);
+        case NETDEV_KIND_VTI:
+                return VTI(netdev);
+        case NETDEV_KIND_VTI6:
+                return VTI6(netdev);
+        case NETDEV_KIND_IP6TNL:
+                return IP6TNL(netdev);
+        case NETDEV_KIND_ERSPAN:
+                return ERSPAN(netdev);
+        default:
+                return NULL;
+        }
+}
+
 extern const NetDevVTable ipip_vtable;
 extern const NetDevVTable sit_vtable;
 extern const NetDevVTable vti_vtable;