1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2#ifndef _MPLS_H
3#define _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 /* _MPLS_H */