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