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/*

 * INET         An implementation of the TCP/IP protocol suite for the LINUX

 *              operating system.  INET is implemented using the  BSD Socket

 *              interface as the means of communication with the user level.

 *

 *              Definitions for the TCP protocol.

 *

 * Version:     @(#)tcp.h       1.0.2   04/28/93

 *

 * Author:      Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>

 *

 *              This program is free software; you can redistribute it and/or

 *              modify it under the terms of the GNU General Public License

 *              as published by the Free Software Foundation; either version

 *              2 of the License, or (at your option) any later version.

 */

#ifndef _LINUX_TCP_H

#define _LINUX_TCP_H

#include <linux/types.h>

#include <asm/byteorder.h>

struct tcphdr {

        __u16   source;

        __u16   dest;

        __u32   seq;

        __u32   ack_seq;

#if defined(__LITTLE_ENDIAN_BITFIELD)

        __u16   res1:4,

                doff:4,

                fin:1,

                syn:1,

                rst:1,

                psh:1,

                ack:1,

                urg:1,

                res2:2;

#elif defined(__BIG_ENDIAN_BITFIELD)

        __u16   doff:4,

                res1:4,

                res2:2,

                urg:1,

                ack:1,

                psh:1,

                rst:1,

                syn:1,

                fin:1;

#else

#error  "Adjust your <asm/byteorder.h> defines"

#endif  

        __u16   window;

        __u16   check;

        __u16   urg_ptr;

};

enum {

  TCP_ESTABLISHED = 1,

  TCP_SYN_SENT,

  TCP_SYN_RECV,

  TCP_FIN_WAIT1,

  TCP_FIN_WAIT2,

  TCP_TIME_WAIT,

  TCP_CLOSE,

  TCP_CLOSE_WAIT,

  TCP_LAST_ACK,

  TCP_LISTEN,

  TCP_CLOSING   /* now a valid state */

};

#endif  /* _LINUX_TCP_H */