ipv6.h

   1 /*
   2  * netsniff-ng - the packet sniffing beast
   3  * By Daniel Borkmann <daniel@netsniff-ng.org>.
   4  * Copyright (C) 2009, 2010 Daniel Borkmann
   5  * Copyright (C) 2012 Christoph Jaeger <christoph@netsniff-ng.org>
   6  * Subject to the GPL, version 2.
   7  */
   8
   9 #ifndef IPV6_H
  10 #define IPV6_H
  11
  12 #include <asm/byteorder.h>
  13
  14 #include "built_in.h"
  15
  16 /*
  17  * IPv6 fixed header
  18  *
  19  * BEWARE, it is incorrect. The first 4 bits of flow_lbl
  20  * are glued to priority now, forming "class".
  21  */
  22 struct ipv6hdr {
  23 #if defined(__LITTLE_ENDIAN_BITFIELD)
  24         __extension__ uint8_t priority:4,
  25                               version:4;
  26 #elif defined(__BIG_ENDIAN_BITFIELD)
  27         __extension__ uint8_t version:4,
  28                               priority:4;
  29 #else
  30 # error "Please fix <asm/byteorder.h>"
  31 #endif
  32         uint8_t flow_lbl[3];
  33         uint16_t payload_len;
  34         uint8_t nexthdr;
  35         uint8_t hop_limit;
  36         struct in6_addr saddr;
  37         struct in6_addr daddr;
  38 } __packed;
  39
  40 #endif /* IPV6_H */