1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
2/*
3 * IPv6 IOAM Lightweight Tunnel API
4 *
5 * Author:
6 * Justin Iurman <justin.iurman@uliege.be>
7 */
8
9#ifndef _LINUX_IOAM6_IPTUNNEL_H
10#define _LINUX_IOAM6_IPTUNNEL_H
11
12/* Encap modes:
13 * - inline: direct insertion
14 * - encap: ip6ip6 encapsulation
15 * - auto: __inline__ for local packets, encap for in-transit packets
16 */
17enum {
18 __IOAM6_IPTUNNEL_MODE_MIN,
19
20 IOAM6_IPTUNNEL_MODE_INLINE,
21 IOAM6_IPTUNNEL_MODE_ENCAP,
22 IOAM6_IPTUNNEL_MODE_AUTO,
23
24 __IOAM6_IPTUNNEL_MODE_MAX,
25};
26
27#define IOAM6_IPTUNNEL_MODE_MIN (__IOAM6_IPTUNNEL_MODE_MIN + 1)
28#define IOAM6_IPTUNNEL_MODE_MAX (__IOAM6_IPTUNNEL_MODE_MAX - 1)
29
30enum {
31 IOAM6_IPTUNNEL_UNSPEC,
32
33 /* Encap mode */
34 IOAM6_IPTUNNEL_MODE, /* u8 */
35
36 /* Tunnel dst address.
37 * For encap,auto modes.
38 */
39 IOAM6_IPTUNNEL_DST, /* struct in6_addr */
40
41 /* IOAM Trace Header */
42 IOAM6_IPTUNNEL_TRACE, /* struct ioam6_trace_hdr */
43
44 /* Insertion frequency:
45 * "k over n" packets (0 < k <= n)
46 * [0.0001% ... 100%]
47 */
48#define IOAM6_IPTUNNEL_FREQ_MIN 1
49#define IOAM6_IPTUNNEL_FREQ_MAX 1000000
50 IOAM6_IPTUNNEL_FREQ_K, /* u32 */
51 IOAM6_IPTUNNEL_FREQ_N, /* u32 */
52
53 /* Tunnel src address.
54 * For encap,auto modes.
55 * Optional (automatic if not provided).
56 */
57 IOAM6_IPTUNNEL_SRC, /* struct in6_addr */
58
59 __IOAM6_IPTUNNEL_MAX,
60};
61
62#define IOAM6_IPTUNNEL_MAX (__IOAM6_IPTUNNEL_MAX - 1)
63
64#endif /* _LINUX_IOAM6_IPTUNNEL_H */