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rpl.h (853B) - Raw

      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 _LINUX_RPL_H
     10 #define _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  */
     19 struct 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