1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
2/*
3 *  IPv6 RPL-SR implementation
4 *
5 *  Author:
6 *  (C) 2020 Alexander Aring <alex.aring@gmail.com>
7 */
8
9#ifndef _UAPI_LINUX_RPL_H
10#define _UAPI_LINUX_RPL_H
11
12#include <asm/byteorder.h>
13#include <linux/types.h>
14#include <linux/in6.h>
15
16/*
17 * RPL SR Header
18 */
19struct ipv6_rpl_sr_hdr {
20	__u8	nexthdr;
21	__u8	hdrlen;
22	__u8	type;
23	__u8	segments_left;
24#if defined(__LITTLE_ENDIAN_BITFIELD)
25	__u32	cmpre:4,
26		cmpri:4,
27		reserved:4,
28		pad:4,
29		reserved1:16;
30#elif defined(__BIG_ENDIAN_BITFIELD)
31	__u32	cmpri:4,
32		cmpre:4,
33		pad:4,
34		reserved:20;
35#else
36#error  "Please fix <asm/byteorder.h>"
37#endif
38
39	union {
40		__DECLARE_FLEX_ARRAY(struct in6_addr, addr);
41		__DECLARE_FLEX_ARRAY(__u8, data);
42	} segments;
43} __attribute__((packed));
44
45#define rpl_segaddr	segments.addr
46#define rpl_segdata	segments.data
47
48#endif
49