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acrn-kernel/include/uapi/linux/rpl.h

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include: uapi: linux: add rpl sr header definition 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>
2020-03-28 06:00:18 +08:00
/* 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)
uapi: fix big endian definition of ipv6_rpl_sr_hdr Following RFC 6554 [1], the current order of fields is wrong for big endian definition. Indeed, here is how the header looks like: +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Next Header | Hdr Ext Len | Routing Type | Segments Left | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | CmprI | CmprE | Pad | Reserved | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ This patch reorders fields so that big endian definition is now correct. [1] https://tools.ietf.org/html/rfc6554#section-3 Fixes: cfa933d938d8 ("include: uapi: linux: add rpl sr header definition") Signed-off-by: Justin Iurman <justin.iurman@uliege.be> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-01-22 06:00:44 +08:00
__u32 cmpri:4,
cmpre:4,
include: uapi: linux: add rpl sr header definition 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>
2020-03-28 06:00:18 +08:00
pad:4,
uapi: fix big endian definition of ipv6_rpl_sr_hdr Following RFC 6554 [1], the current order of fields is wrong for big endian definition. Indeed, here is how the header looks like: +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Next Header | Hdr Ext Len | Routing Type | Segments Left | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | CmprI | CmprE | Pad | Reserved | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ This patch reorders fields so that big endian definition is now correct. [1] https://tools.ietf.org/html/rfc6554#section-3 Fixes: cfa933d938d8 ("include: uapi: linux: add rpl sr header definition") Signed-off-by: Justin Iurman <justin.iurman@uliege.be> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-01-22 06:00:44 +08:00
reserved:20;
include: uapi: linux: add rpl sr header definition 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>
2020-03-28 06:00:18 +08:00
#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