47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
#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 */
|
|
|
|
#define MPLS_LABEL_FIRST_UNRESERVED 16 /* RFC3032 */
|
|
|
|
#endif /* _UAPI_MPLS_H */
|