LXR linux/include/net/mpls.h

   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
  14struct mpls_shim_hdr {
  15        __be32 label_stack_entry;
  16};
  17
  18static 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
  24static 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