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5b497af4 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
25cd9ba0 SH |
2 | /* |
3 | * Copyright (c) 2014 Nicira, Inc. | |
25cd9ba0 SH |
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> | |
86ae579c | 11 | #include <linux/mpls.h> |
25cd9ba0 SH |
12 | |
13 | #define MPLS_HLEN 4 | |
14 | ||
9095e10e JB |
15 | struct mpls_shim_hdr { |
16 | __be32 label_stack_entry; | |
17 | }; | |
18 | ||
25cd9ba0 SH |
19 | static inline bool eth_p_mpls(__be16 eth_type) |
20 | { | |
21 | return eth_type == htons(ETH_P_MPLS_UC) || | |
22 | eth_type == htons(ETH_P_MPLS_MC); | |
23 | } | |
24 | ||
9095e10e JB |
25 | static inline struct mpls_shim_hdr *mpls_hdr(const struct sk_buff *skb) |
26 | { | |
27 | return (struct mpls_shim_hdr *)skb_network_header(skb); | |
28 | } | |
86ae579c EC |
29 | |
30 | static inline struct mpls_shim_hdr mpls_entry_encode(u32 label, | |
31 | unsigned int ttl, | |
32 | unsigned int tc, | |
33 | bool bos) | |
34 | { | |
35 | struct mpls_shim_hdr result; | |
36 | ||
37 | result.label_stack_entry = | |
38 | cpu_to_be32((label << MPLS_LS_LABEL_SHIFT) | | |
39 | (tc << MPLS_LS_TC_SHIFT) | | |
40 | (bos ? (1 << MPLS_LS_S_SHIFT) : 0) | | |
41 | (ttl << MPLS_LS_TTL_SHIFT)); | |
42 | return result; | |
43 | } | |
44 | ||
25cd9ba0 | 45 | #endif |