46 lines
943 B
C
46 lines
943 B
C
|
/* SPDX-License-Identifier: GPL-2.0-only */
|
||
|
|
/*
|
||
|
|
* Copyright (c) 2014 Nicira, Inc.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _NET_MPLS_H
|
||
|
|
#define _NET_MPLS_H 1
|
||
|
|
|
||
|
|
#include <linux/if_ether.h>
|
||
|
|
#include <linux/netdevice.h>
|
||
|
|
#include <linux/mpls.h>
|
||
|
|
|
||
|
|
#define MPLS_HLEN 4
|
||
|
|
|
||
|
|
struct mpls_shim_hdr {
|
||
|
|
__be32 label_stack_entry;
|
||
|
|
};
|
||
|
|
|
||
|
|
static inline bool eth_p_mpls(__be16 eth_type)
|
||
|
|
{
|
||
|
|
return eth_type == htons(ETH_P_MPLS_UC) ||
|
||
|
|
eth_type == htons(ETH_P_MPLS_MC);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline struct mpls_shim_hdr *mpls_hdr(const struct sk_buff *skb)
|
||
|
|
{
|
||
|
|
return (struct mpls_shim_hdr *)skb_network_header(skb);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline struct mpls_shim_hdr mpls_entry_encode(u32 label,
|
||
|
|
unsigned int ttl,
|
||
|
|
unsigned int tc,
|
||
|
|
bool bos)
|
||
|
|
{
|
||
|
|
struct mpls_shim_hdr result;
|
||
|
|
|
||
|
|
result.label_stack_entry =
|
||
|
|
cpu_to_be32((label << MPLS_LS_LABEL_SHIFT) |
|
||
|
|
(tc << MPLS_LS_TC_SHIFT) |
|
||
|
|
(bos ? (1 << MPLS_LS_S_SHIFT) : 0) |
|
||
|
|
(ttl << MPLS_LS_TTL_SHIFT));
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|