LXR linux/include/uapi/linux/mpls.h

   1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2#ifndef _UAPI_MPLS_H
   3#define _UAPI_MPLS_H
   4
   5#include <linux/types.h>
   6#include <asm/byteorder.h>
   7
   8/* Reference: RFC 5462, RFC 3032
   9 *
  10 *  0                   1                   2                   3
  11 *  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
  12 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  13 * |                Label                  | TC  |S|       TTL     |
  14 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  15 *
  16 *      Label:  Label Value, 20 bits
  17 *      TC:     Traffic Class field, 3 bits
  18 *      S:      Bottom of Stack, 1 bit
  19 *      TTL:    Time to Live, 8 bits
  20 */
  21
  22struct mpls_label {
  23        __be32 entry;
  24};
  25
  26#define MPLS_LS_LABEL_MASK      0xFFFFF000
  27#define MPLS_LS_LABEL_SHIFT     12
  28#define MPLS_LS_TC_MASK         0x00000E00
  29#define MPLS_LS_TC_SHIFT        9
  30#define MPLS_LS_S_MASK          0x00000100
  31#define MPLS_LS_S_SHIFT         8
  32#define MPLS_LS_TTL_MASK        0x000000FF
  33#define MPLS_LS_TTL_SHIFT       0
  34
  35/* Reserved labels */
  36#define MPLS_LABEL_IPV4NULL             0 /* RFC3032 */
  37#define MPLS_LABEL_RTALERT              1 /* RFC3032 */
  38#define MPLS_LABEL_IPV6NULL             2 /* RFC3032 */
  39#define MPLS_LABEL_IMPLNULL             3 /* RFC3032 */
  40#define MPLS_LABEL_ENTROPY              7 /* RFC6790 */
  41#define MPLS_LABEL_GAL                  13 /* RFC5586 */
  42#define MPLS_LABEL_OAMALERT             14 /* RFC3429 */
  43#define MPLS_LABEL_EXTENSION            15 /* RFC7274 */
  44
  45#define MPLS_LABEL_FIRST_UNRESERVED     16 /* RFC3032 */
  46
  47/* These are embedded into IFLA_STATS_AF_SPEC:
  48 * [IFLA_STATS_AF_SPEC]
  49 * -> [AF_MPLS]
  50 *    -> [MPLS_STATS_xxx]
  51 *
  52 * Attributes:
  53 * [MPLS_STATS_LINK] = {
  54 *     struct mpls_link_stats
  55 * }
  56 */
  57enum {
  58        MPLS_STATS_UNSPEC, /* also used as 64bit pad attribute */
  59        MPLS_STATS_LINK,
  60        __MPLS_STATS_MAX,
  61};
  62
  63#define MPLS_STATS_MAX (__MPLS_STATS_MAX - 1)
  64
  65struct mpls_link_stats {
  66        __u64   rx_packets;             /* total packets received       */
  67        __u64   tx_packets;             /* total packets transmitted    */
  68        __u64   rx_bytes;               /* total bytes received         */
  69        __u64   tx_bytes;               /* total bytes transmitted      */
  70        __u64   rx_errors;              /* bad packets received         */
  71        __u64   tx_errors;              /* packet transmit problems     */
  72        __u64   rx_dropped;             /* packet dropped on receive    */
  73        __u64   tx_dropped;             /* packet dropped on transmit   */
  74        __u64   rx_noroute;             /* no route for packet dest     */
  75};
  76
  77#endif /* _UAPI_MPLS_H */
  78