tcp.h

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#ifndef _NETINET_TCP_H_
#define _NETINET_TCP_H_

/*
 * Copyright (C) 2001-2003 by egnite Software GmbH. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holders nor the names of
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY EGNITE SOFTWARE GMBH AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL EGNITE
 * SOFTWARE GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * For additional information see http://www.ethernut.de/
 *
 * -
 * Portions Copyright (C) 2000 David J. Hudson <dave@humbug.demon.co.uk>
 *
 * This file is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.
 *
 * You can redistribute this file and/or modify it under the terms of the GNU
 * General Public License (GPL) as published by the Free Software Foundation;
 * either version 2 of the License, or (at your discretion) any later version.
 * See the accompanying file "copying-gpl.txt" for more details.
 *
 * As a special exception to the GPL, permission is granted for additional
 * uses of the text contained in this file.  See the accompanying file
 * "copying-liquorice.txt" for details.
 * -
 * Portions Copyright (c) 1983, 1993 by
 *  The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*
 * $Log$
 * Revision 1.6  2008/08/11 07:00:23  haraldkipp
 * BSD types replaced by stdint types (feature request #1282721).
 *
 * Revision 1.5  2006/03/21 21:22:18  drsung
 * Enhancement made to TCP state machine. Now TCP options
 * are read from peer and at least the maximum segment size is stored.
 *
 * Revision 1.4  2005/08/02 17:46:49  haraldkipp
 * Major API documentation update.
 *
 * Revision 1.3  2005/04/05 17:38:45  haraldkipp
 * ARM7 memory alignment bugs fixed.
 *
 * Revision 1.2  2004/03/16 16:48:28  haraldkipp
 * Added Jan Dubiec's H8/300 port.
 *
 * Revision 1.1.1.1  2003/05/09 14:41:16  haraldkipp
 * Initial using 3.2.1
 *
 * Revision 1.7  2003/02/04 18:00:46  harald
 * Version 3 released
 *
 * Revision 1.6  2002/09/03 17:49:58  harald
 * *** empty log message ***
 *
 * Revision 1.5  2002/08/16 17:53:36  harald
 * Larger window size for better MP3 stream results
 *
 * Revision 1.4  2002/06/26 17:29:22  harald
 * First pre-release with 2.4 stack
 *
 */

#include <sys/types.h>
#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

#define TH_FIN  0x01    
#define TH_SYN  0x02    
#define TH_RST  0x04    
#define TH_PUSH 0x08    
#define TH_ACK  0x10    
#define TH_URG  0x20    
#define TH_FLAGS (TH_FIN | TH_SYN | TH_RST | TH_ACK | TH_URG)

typedef struct __attribute__ ((packed)) tcphdr {
    uint16_t th_sport;       
    uint16_t th_dport;       
    uint32_t  th_seq;         
    uint32_t  th_ack;         
#ifndef __BIG_ENDIAN__
#ifdef __IMAGECRAFT__
    unsigned th_x2:4,
             th_off:4;
#else /* #ifndef __BIG_ENDIAN__ */
    uint8_t  th_x2:4,        
            th_off:4;       
#endif
#else /* #ifndef __BIG_ENDIAN__ */
    uint8_t  th_off:4,       
            th_x2:4;        
#endif
    uint8_t  th_flags;       
    uint16_t th_win;         
    uint16_t th_sum;         
    uint16_t th_urp;         
} TCPHDR;

#define TCPOPT_EOL                  0   
#define TCPOPT_NOP                  1   
#define TCPOPT_MAXSEG               2   
#define TCPOLEN_MAXSEG              4   
#define TCPOPT_WINDOW               3   
#define TCPOLEN_WINDOW              3   
typedef struct _TCPPSEUDOHDR {
    uint32_t  tph_src;    
    uint32_t  tph_dst;    
    uint8_t  tph_mbz;    
    uint8_t  tph_p;      
    uint16_t tph_len;    
    uint16_t tph_sum;    
} TCPPSEUDOHDR;


#define TCP_MSS             536     
#define TCP_WINSIZE         3216    
#define TCP_MAXWIN          65535   
#define TTCP_CLIENT_SND_WND 4096    
#define TCP_MAX_WINSHIFT    14      
#define TCP_MAXHLEN         (0xf<<2)    
#define TCP_MAXOLEN         (TCP_MAXHLEN - sizeof(struct tcphdr))   
/*
 * User-settable options.
 */
#define TCP_NODELAY 0x01    
#define TCP_MAXSEG  0x02    
#define TCP_NOPUSH  0x04    
#define TCP_NOOPT   0x08    
#ifdef __cplusplus
}
#endif

#endif