include/linux/ip.h

/* */
   1 /*
   2  * INET         An implementation of the TCP/IP protocol suite for the LINUX
   3  *              operating system.  INET is implemented using the  BSD Socket
   4  *              interface as the means of communication with the user level.
   5  *
   6  *              Definitions for the IP protocol.
   7  *
   8  * Version:     @(#)ip.h        1.0.2   04/28/93
   9  *
  10  * Authors:     Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
  11  *
  12  *              This program is free software; you can redistribute it and/or
  13  *              modify it under the terms of the GNU General Public License
  14  *              as published by the Free Software Foundation; either version
  15  *              2 of the License, or (at your option) any later version.
  16  */
  17 #ifndef _LINUX_IP_H
  18 #define _LINUX_IP_H
  19 
  20 
  21 #define IPOPT_END       0
  22 #define IPOPT_NOOP      1
  23 #define IPOPT_SEC       130
  24 #define IPOPT_LSRR      131
  25 #define IPOPT_SSRR      137
  26 #define IPOPT_RR        7
  27 #define IPOPT_SID       136
  28 #define IPOPT_TIMESTAMP 68
  29 
  30 
  31 #define MAXTTL          255
  32 
  33 struct timestamp {
  34         __u8    len;
  35         __u8    ptr;
  36         union {
  37 #if defined(__i386__)  
  38                 __u8    flags:4,
  39                         overflow:4;
  40 #elif defined(__mc68000__)
  41                 __u8    overflow:4,
  42                         flags:4;
  43 #elif defined(__alpha__)
  44                 __u8    flags:4,
  45                         overflow:4;
  46 #else
  47 #error  "Adjust this structure to match your CPU"
  48 #endif                                          
  49                 __u8    full_char;
  50         } x;
  51         __u32   data[9];
  52 };
  53 
  54 
  55 #define MAX_ROUTE       16
  56 
  57 struct route {
  58   char          route_size;
  59   char          pointer;
  60   unsigned long route[MAX_ROUTE];
  61 };
  62 
  63 
  64 struct options {
  65   struct route          record_route;
  66   struct route          loose_route;
  67   struct route          strict_route;
  68   struct timestamp      tstamp;
  69   unsigned short        security;
  70   unsigned short        compartment;
  71   unsigned short        handling;
  72   unsigned short        stream;
  73   unsigned              tcc;
  74 };
  75 
  76 
  77 struct iphdr {
  78 #if defined(__i386__)
  79         __u8    ihl:4,
  80                 version:4;
  81 #elif defined (__mc68000__)
  82         __u8    version:4,
  83                 ihl:4;
  84 #elif defined (__alpha__)
  85         __u8    ihl:4,
  86                 version:4;
  87 #else
  88 #error "Adjust this structure to match your CPU"
  89 #endif
  90         __u8    tos;
  91         __u16   tot_len;
  92         __u16   id;
  93         __u16   frag_off;
  94         __u8    ttl;
  95         __u8    protocol;
  96         __u16   check;
  97         __u32   saddr;
  98         __u32   daddr;
  99         /*The options start here. */
 100 };
 101 
 102 
 103 #endif  /* _LINUX_IP_H */
/* */
root/include/linux/ip.h

INCLUDED FROM
