| #ifndef _UAPI_MPLS_H |
| #define _UAPI_MPLS_H |
| |
| #include <linux/types.h> |
| #include <asm/byteorder.h> |
| |
| /* Reference: RFC 5462, RFC 3032 |
| * |
| * 0 1 2 3 |
| * 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 |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * | Label | TC |S| TTL | |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * |
| * Label: Label Value, 20 bits |
| * TC: Traffic Class field, 3 bits |
| * S: Bottom of Stack, 1 bit |
| * TTL: Time to Live, 8 bits |
| */ |
| |
| struct mpls_label { |
| __be32 entry; |
| }; |
| |
| #define MPLS_LS_LABEL_MASK 0xFFFFF000 |
| #define MPLS_LS_LABEL_SHIFT 12 |
| #define MPLS_LS_TC_MASK 0x00000E00 |
| #define MPLS_LS_TC_SHIFT 9 |
| #define MPLS_LS_S_MASK 0x00000100 |
| #define MPLS_LS_S_SHIFT 8 |
| #define MPLS_LS_TTL_MASK 0x000000FF |
| #define MPLS_LS_TTL_SHIFT 0 |
| |
| /* Reserved labels */ |
| #define MPLS_LABEL_IPV4NULL 0 /* RFC3032 */ |
| #define MPLS_LABEL_RTALERT 1 /* RFC3032 */ |
| #define MPLS_LABEL_IPV6NULL 2 /* RFC3032 */ |
| #define MPLS_LABEL_IMPLNULL 3 /* RFC3032 */ |
| #define MPLS_LABEL_ENTROPY 7 /* RFC6790 */ |
| #define MPLS_LABEL_GAL 13 /* RFC5586 */ |
| #define MPLS_LABEL_OAMALERT 14 /* RFC3429 */ |
| #define MPLS_LABEL_EXTENSION 15 /* RFC7274 */ |
| |
| #endif /* _UAPI_MPLS_H */ |
