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 #include <asm/byteorder.h>
  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 #if defined(__LITTLE_ENDIAN_BITFIELD)
  37         __u8    flags:4,
  38                 overflow:4;
  39 #elif defined(__BIG_ENDIAN_BITFIELD)
  40         __u8    overflow:4,
  41                 flags:4;
  42 #else
  43 #error  "Please fix <asm/byteorder.h>"
  44 #endif                                          
  45         __u32   data[9];
  46 };
  47 
  48 
  49 #define MAX_ROUTE       16
  50 
  51 struct route {
  52   char          route_size;
  53   char          pointer;
  54   unsigned long route[MAX_ROUTE];
  55 };
  56 
  57 #define IPOPT_OPTVAL 0
  58 #define IPOPT_OLEN   1
  59 #define IPOPT_OFFSET 2
  60 #define IPOPT_MINOFF 4
  61 #define MAX_IPOPTLEN 40
  62 #define IPOPT_NOP IPOPT_NOOP
  63 #define IPOPT_EOL IPOPT_END
  64 #define IPOPT_TS  IPOPT_TIMESTAMP
  65 
  66 #define IPOPT_TS_TSONLY         0               /* timestamps only */
  67 #define IPOPT_TS_TSANDADDR      1               /* timestamps and addresses */
  68 #define IPOPT_TS_PRESPEC        2               /* specified modules only */
  69 
  70 struct options {
  71   __u32         faddr;                          /* Saved first hop address */
  72   unsigned char optlen;
  73   unsigned char srr;
  74   unsigned char rr;
  75   unsigned char ts;
  76   unsigned char is_setbyuser:1,                 /* Set by setsockopt?                   */
  77                 is_data:1,                      /* Options in __data, rather than skb   */
  78                 is_strictroute:1,               /* Strict source route                  */
  79                 srr_is_hit:1,                   /* Packet destination addr was our one  */
  80                 is_changed:1,                   /* IP checksum more not valid           */      
  81                 rr_needaddr:1,                  /* Need to record addr of outgoing dev  */
  82                 ts_needtime:1,                  /* Need to record timestamp             */
  83                 ts_needaddr:1;                  /* Need to record addr of outgoing dev  */
  84   unsigned char __pad1;
  85   unsigned char __pad2;
  86   unsigned char __pad3;
  87   unsigned char __data[0];
  88 };
  89 
  90 struct iphdr {
  91 #if defined(__LITTLE_ENDIAN_BITFIELD)
  92         __u8    ihl:4,
  93                 version:4;
  94 #elif defined (__BIG_ENDIAN_BITFIELD)
  95         __u8    version:4,
  96                 ihl:4;
  97 #else
  98 #error  "Please fix <asm/byteorder.h>"
  99 #endif
 100         __u8    tos;
 101         __u16   tot_len;
 102         __u16   id;
 103         __u16   frag_off;
 104         __u8    ttl;
 105         __u8    protocol;
 106         __u16   check;
 107         __u32   saddr;
 108         __u32   daddr;
 109         /*The options start here. */
 110 };
 111 
 112 #endif  /* _LINUX_IP_H */
/* */
root/include/linux/ip.h

INCLUDED FROM
