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