1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (c) 2014 Nicira, Inc. 4 */ 5 6 #ifndef _NET_MPLS_H 7 #define _NET_MPLS_H 1 8 9 #include <linux/if_ether.h> 10 #include <linux/netdevice.h> 11 12 #define MPLS_HLEN 4 13 14 struct mpls_shim_hdr { 15 __be32 label_stack_entry; 16 }; 17 18 static inline bool eth_p_mpls(__be16 eth_type) 19 { 20 return eth_type == htons(ETH_P_MPLS_UC) || 21 eth_type == htons(ETH_P_MPLS_MC); 22 } 23 24 static inline struct mpls_shim_hdr *mpls_hdr(const struct sk_buff *skb) 25 { 26 return (struct mpls_shim_hdr *)skb_network_header(skb); 27 } 28 #endif 29