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f3baa393 SW |
1 | #ifndef _UAPI_MPLS_H |
2 | #define _UAPI_MPLS_H | |
3 | ||
4 | #include <linux/types.h> | |
5 | #include <asm/byteorder.h> | |
6 | ||
7 | /* Reference: RFC 5462, RFC 3032 | |
8 | * | |
9 | * 0 1 2 3 | |
10 | * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 | |
11 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
12 | * | Label | TC |S| TTL | | |
13 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
14 | * | |
15 | * Label: Label Value, 20 bits | |
16 | * TC: Traffic Class field, 3 bits | |
17 | * S: Bottom of Stack, 1 bit | |
18 | * TTL: Time to Live, 8 bits | |
19 | */ | |
20 | ||
21 | struct mpls_label { | |
22 | __be32 entry; | |
23 | }; | |
24 | ||
25 | #define MPLS_LS_LABEL_MASK 0xFFFFF000 | |
26 | #define MPLS_LS_LABEL_SHIFT 12 | |
27 | #define MPLS_LS_TC_MASK 0x00000E00 | |
28 | #define MPLS_LS_TC_SHIFT 9 | |
29 | #define MPLS_LS_S_MASK 0x00000100 | |
30 | #define MPLS_LS_S_SHIFT 8 | |
31 | #define MPLS_LS_TTL_MASK 0x000000FF | |
32 | #define MPLS_LS_TTL_SHIFT 0 | |
33 | ||
c967a087 | 34 | /* Reserved labels */ |
78f5b899 TH |
35 | #define MPLS_LABEL_IPV4NULL 0 /* RFC3032 */ |
36 | #define MPLS_LABEL_RTALERT 1 /* RFC3032 */ | |
37 | #define MPLS_LABEL_IPV6NULL 2 /* RFC3032 */ | |
38 | #define MPLS_LABEL_IMPLNULL 3 /* RFC3032 */ | |
39 | #define MPLS_LABEL_ENTROPY 7 /* RFC6790 */ | |
c967a087 | 40 | #define MPLS_LABEL_GAL 13 /* RFC5586 */ |
78f5b899 | 41 | #define MPLS_LABEL_OAMALERT 14 /* RFC3429 */ |
c967a087 TH |
42 | #define MPLS_LABEL_EXTENSION 15 /* RFC7274 */ |
43 | ||
f3baa393 | 44 | #endif /* _UAPI_MPLS_H */ |