blob: 5b3b5addfb080a37baf43ec7bde328f3c579b869 [file] [log] [blame]
Simon Horman25cd9ba2014-10-06 05:05:13 -07001/*
2 * Copyright (c) 2014 Nicira, Inc.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of version 2 of the GNU General Public
6 * License as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
12 */
13
14#ifndef _NET_MPLS_H
15#define _NET_MPLS_H 1
16
17#include <linux/if_ether.h>
18#include <linux/netdevice.h>
19
20#define MPLS_HLEN 4
21
22static inline bool eth_p_mpls(__be16 eth_type)
23{
24 return eth_type == htons(ETH_P_MPLS_UC) ||
25 eth_type == htons(ETH_P_MPLS_MC);
26}
27
28/*
29 * For non-MPLS skbs this will correspond to the network header.
30 * For MPLS skbs it will be before the network_header as the MPLS
31 * label stack lies between the end of the mac header and the network
32 * header. That is, for MPLS skbs the end of the mac header
33 * is the top of the MPLS label stack.
34 */
35static inline unsigned char *skb_mpls_header(struct sk_buff *skb)
36{
37 return skb_mac_header(skb) + skb->mac_len;
38}
39#endif