| Simon Horman | 25cd9ba | 2014-10-06 05:05:13 -0700 | [diff] [blame] | 1 | /* |
| 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 | |
| 22 | static 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 | */ |
| 35 | static inline unsigned char *skb_mpls_header(struct sk_buff *skb) |
| 36 | { |
| 37 | return skb_mac_header(skb) + skb->mac_len; |
| 38 | } |
| 39 | #endif |