| /* |
| * 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 |
