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/*
* Copyright (c) 2014 Nicira, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#ifndef _NET_MPLS_H
#define _NET_MPLS_H 1
#include <linux/if_ether.h>
#include <linux/netdevice.h>
#define MPLS_HLEN 4
static inline bool eth_p_mpls(__be16 eth_type)
{
return eth_type == htons(ETH_P_MPLS_UC) ||
eth_type == htons(ETH_P_MPLS_MC);
}
/*
* For non-MPLS skbs this will correspond to the network header.
* For MPLS skbs it will be before the network_header as the MPLS
* label stack lies between the end of the mac header and the network
* header. That is, for MPLS skbs the end of the mac header
* is the top of the MPLS label stack.
*/
static inline unsigned char *skb_mpls_header(struct sk_buff *skb)
{
return skb_mac_header(skb) + skb->mac_len;
}
#endif