/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
/*
 *  IPv6 IOAM Lightweight Tunnel API
 *
 *  Author:
 *  Justin Iurman <justin.iurman@uliege.be>
 */

#ifndef _UAPI_LINUX_IOAM6_IPTUNNEL_H
#define _UAPI_LINUX_IOAM6_IPTUNNEL_H

/* Encap modes:
 *  - inline: direct insertion
 *  - encap: ip6ip6 encapsulation
 *  - auto: inline for local packets, encap for in-transit packets
 */
enum {
        __IOAM6_IPTUNNEL_MODE_MIN,

        IOAM6_IPTUNNEL_MODE_INLINE,
        IOAM6_IPTUNNEL_MODE_ENCAP,
        IOAM6_IPTUNNEL_MODE_AUTO,

        __IOAM6_IPTUNNEL_MODE_MAX,
};

#define IOAM6_IPTUNNEL_MODE_MIN (__IOAM6_IPTUNNEL_MODE_MIN + 1)
#define IOAM6_IPTUNNEL_MODE_MAX (__IOAM6_IPTUNNEL_MODE_MAX - 1)

enum {
        IOAM6_IPTUNNEL_UNSPEC,

        /* Encap mode */
        IOAM6_IPTUNNEL_MODE,            /* u8 */

        /* Tunnel dst address.
         * For encap,auto modes.
         */
        IOAM6_IPTUNNEL_DST,             /* struct in6_addr */

        /* IOAM Trace Header */
        IOAM6_IPTUNNEL_TRACE,           /* struct ioam6_trace_hdr */

        /* Insertion frequency:
         * "k over n" packets (0 < k <= n)
         * [0.0001% ... 100%]
         */
#define IOAM6_IPTUNNEL_FREQ_MIN 1
#define IOAM6_IPTUNNEL_FREQ_MAX 1000000
        IOAM6_IPTUNNEL_FREQ_K,          /* u32 */
        IOAM6_IPTUNNEL_FREQ_N,          /* u32 */

        /* Tunnel src address.
         * For encap,auto modes.
         * Optional (automatic if not provided).
         */
        IOAM6_IPTUNNEL_SRC,             /* struct in6_addr */

        __IOAM6_IPTUNNEL_MAX,
};

#define IOAM6_IPTUNNEL_MAX (__IOAM6_IPTUNNEL_MAX - 1)

#endif /* _UAPI_LINUX_IOAM6_IPTUNNEL_H */