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 _UAPI_LINUX_IOAM6_IPTUNNEL_H
10 #define _UAPI_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  */
17 enum {
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 
30 enum {
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 	__IOAM6_IPTUNNEL_MAX,
54 };
55 
56 #define IOAM6_IPTUNNEL_MAX (__IOAM6_IPTUNNEL_MAX - 1)
57 
58 #endif /* _UAPI_LINUX_IOAM6_IPTUNNEL_H */
59