include: uapi: linux: add rpl sr header definition (cfa933d9) · Commits · 戴 / test

This patch adds a uapi header for rpl struct definition. The segments data can be accessed over rpl_segaddr or rpl_segdata macros. In case of compri and compre is zero the segment data is not compressed and can be accessed by rpl_segaddr. In the other case the compressed data can be accessed by rpl_segdata and interpreted as byte array. Signed-off-by:

Alexander Aring <alex.aring@gmail.com> Signed-off-by:

David S. Miller <davem@davemloft.net>

include/uapi/linux/rpl.h

0 → 100644

+48 −0

Original line number	Diff line number	Diff line
		/* 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 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

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