/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
/*
 *  IPv6 RPL-SR implementation
 *
 *  Author:
 *  (C) 2020 Alexander Aring <alex.aring@gmail.com>
 */

#ifndef _UAPI_LINUX_RPL_H
#define _UAPI_LINUX_RPL_H

#include <asm/byteorder.h>
#include <linux/types.h>
#include <linux/in6.h>

/*
 * RPL SR Header
 */
struct ipv6_rpl_sr_hdr {
        __u8    nexthdr;
        __u8    hdrlen;
        __u8    type;
        __u8    segments_left;
#if defined(__LITTLE_ENDIAN_BITFIELD)
        __u32   cmpre:4,
                cmpri:4,
                reserved:4,
                pad:4,
                reserved1:16;
#elif defined(__BIG_ENDIAN_BITFIELD)
        __u32   cmpri:4,
                cmpre:4,
                pad:4,
                reserved:20;
#else
#error  "Please fix <asm/byteorder.h>"
#endif

        union {
                __DECLARE_FLEX_ARRAY(struct in6_addr, addr);
                __DECLARE_FLEX_ARRAY(__u8, data);
        } segments;
} __attribute__((packed));

#define rpl_segaddr     segments.addr
#define rpl_segdata     segments.data

#endif