include/linux/tcp.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 TCP protocol.
   7  *
   8  * Version:     @(#)tcp.h       1.0.2   04/28/93
   9  *
  10  * Author:      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_TCP_H
  18 #define _LINUX_TCP_H
  19 
  20 
  21 #define HEADER_SIZE     128             /* maximum header size          */
  22 
  23 
  24 struct tcphdr {
  25         __u16   source;
  26         __u16   dest;
  27         __u32   seq;
  28         __u32   ack_seq;
  29 #if defined(__LITTLE_ENDIAN_BITFIELD)
  30         __u16   res1:4,
  31                 doff:4,
  32                 fin:1,
  33                 syn:1,
  34                 rst:1,
  35                 psh:1,
  36                 ack:1,
  37                 urg:1,
  38                 res2:2;
  39 #elif defined(__BIG_ENDIAN_BITFIELD)
  40         __u16   doff:4,
  41                 res1:4,
  42                 res2:2,
  43                 urg:1,
  44                 ack:1,
  45                 psh:1,
  46                 rst:1,
  47                 syn:1,
  48                 fin:1;
  49 #else
  50 #error  "Adjust your <asm/byteorder.h> defines"
  51 #endif  
  52         __u16   window;
  53         __u16   check;
  54         __u16   urg_ptr;
  55 };
  56 
  57 
  58 enum {
  59   TCP_ESTABLISHED = 1,
  60   TCP_SYN_SENT,
  61   TCP_SYN_RECV,
  62   TCP_FIN_WAIT1,
  63   TCP_FIN_WAIT2,
  64   TCP_TIME_WAIT,
  65   TCP_CLOSE,
  66   TCP_CLOSE_WAIT,
  67   TCP_LAST_ACK,
  68   TCP_LISTEN,
  69   TCP_CLOSING   /* now a valid state */
  70 };
  71 
  72 #endif  /* _LINUX_TCP_H */
/* */
root/include/linux/tcp.h

INCLUDED FROM
