ipv4.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 IPV4_H
  10 #define IPV4_H
  11
  12 #include <asm/byteorder.h>
  13
  14 #include "built_in.h"
  15
  16 struct ipv4hdr {
  17 #if defined(__LITTLE_ENDIAN_BITFIELD)
  18         __extension__ uint8_t h_ihl:4,
  19                               h_version:4;
  20 #elif defined (__BIG_ENDIAN_BITFIELD)
  21         __extension__ uint8_t h_version:4,
  22                               h_ihl:4;
  23 #else
  24 # error "Please fix <asm/byteorder.h>"
  25 #endif
  26         uint8_t h_tos;
  27         uint16_t h_tot_len;
  28         uint16_t h_id;
  29         uint16_t h_frag_off;
  30         uint8_t h_ttl;
  31         uint8_t h_protocol;
  32         uint16_t h_check;
  33         uint32_t h_saddr;
  34         uint32_t h_daddr;
  35 } __packed;
  36
  37 #endif /* IPV4_H */