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     64              /* maximum header size          */
  22 
  23 
  24 struct tcphdr {
  25   unsigned short        source;
  26   unsigned short        dest;
  27   unsigned long         seq;
  28   unsigned long         ack_seq;
  29   unsigned short        res1:4,
  30                         doff:4,
  31                         fin:1,
  32                         syn:1,
  33                         rst:1,
  34                         psh:1,
  35                         ack:1,
  36                         urg:1,
  37                         res2:2;
  38   unsigned short        window;
  39   unsigned short        check;
  40   unsigned short        urg_ptr;
  41 };
  42 
  43 
  44 enum {
  45   TCP_ESTABLISHED = 1,
  46   TCP_SYN_SENT,
  47   TCP_SYN_RECV,
  48 #if 0
  49   TCP_CLOSING, /* not a valid state, just a seperator so we can use
  50                   < tcp_closing or > tcp_closing for checks. */
  51 #endif
  52   TCP_FIN_WAIT1,
  53   TCP_FIN_WAIT2,
  54   TCP_TIME_WAIT,
  55   TCP_CLOSE,
  56   TCP_CLOSE_WAIT,
  57   TCP_LAST_ACK,
  58   TCP_LISTEN
  59 };
  60 
  61 #endif  /* _LINUX_TCP_H */
/* */
root/include/linux/tcp.h

INCLUDED FROM
