/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */

/*

 *  IPv6 RPL-SR implementation

 *

 *  Author:

 *  (C) 2020 Alexander Aring <alex.aring@gmail.com>

 */

#ifndef _LINUX_RPL_H

#define _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	reserved:20,

		pad:4,

		cmpri:4,

		cmpre:4;

#else

#error  "Please fix <asm/byteorder.h>"

#endif

	union {

		struct in6_addr addr[0];

		__u8 data[0];

	} segments;

} __attribute__((packed));

#define rpl_segaddr	segments.addr

#define rpl_segdata	segments.data

#endif