| Simon Wunderlich | f3baa39 | 2014-03-03 17:23:11 +0100 | [diff] [blame] | 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 | |
| 34 | #endif /* _UAPI_MPLS_H */ |