diff options
| author | Alexander Aring <alex.aring@gmail.com> | 2020-03-27 18:00:18 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-03-29 22:30:57 -0700 |
| commit | cfa933d938d896c37ca0b952437875886d84f3f5 (patch) | |
| tree | 3c0e6668fcf9fd15511ee750d93d02a829776e72 | |
| parent | c189b5483c1bef24dc3755177b19a595c7e668c9 (diff) | |
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>
| -rw-r--r-- | include/uapi/linux/rpl.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/include/uapi/linux/rpl.h b/include/uapi/linux/rpl.h new file mode 100644 index 000000000000..1dccb55cf8c6 --- /dev/null +++ b/include/uapi/linux/rpl.h @@ -0,0 +1,48 @@ +/* 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 |