ipv6.h

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