1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * Copyright (c) 2014 Nicira, Inc.
 
 
 
 
 
 
 
 
 
 4 */
 5
 6#ifndef _NET_MPLS_H
 7#define _NET_MPLS_H 1
 8
 9#include <linux/if_ether.h>
10#include <linux/netdevice.h>
11
12#define MPLS_HLEN 4
13
14struct mpls_shim_hdr {
15	__be32 label_stack_entry;
16};
17
18static inline bool eth_p_mpls(__be16 eth_type)
19{
20	return eth_type == htons(ETH_P_MPLS_UC) ||
21		eth_type == htons(ETH_P_MPLS_MC);
22}
23
24static inline struct mpls_shim_hdr *mpls_hdr(const struct sk_buff *skb)
 
 
 
 
 
 
 
25{
26	return (struct mpls_shim_hdr *)skb_network_header(skb);
27}
28#endif

 
 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
 
 
 
 
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