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/* 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