?? nettcphd.h
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/*****************************************************************************
* nettcphd.h - Network Transmission Control Header Protocol header file.
*
* Copyright (c) 1998 Global Election Systems Inc.
*
* The authors hereby grant permission to use, copy, modify, distribute,
* and license this software and its documentation for any purpose, provided
* that existing copyright notices are retained in all copies and that this
* notice and the following disclaimer are included verbatim in any
* distributions. No written agreement, license, or royalty fee is required
* for any of the authorized uses.
*
* THIS SOFTWARE IS PROVIDED BY THE 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 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.
*
******************************************************************************
* REVISION HISTORY
*
* 98-03-02 Guy Lancaster <glanca@gesn.com>, Global Election Systems Inc.
* Original based on ka9q and BSD codes.
******************************************************************************
* THEORY OF OPERATION
*
*****************************************************************************/
#ifndef NETTCPHDR_H
#define NETTCPHDR_H
/*************************
*** PUBLIC DEFINITIONS ***
**************************/
/*
* TCP Header Flag Masks.
*/
#define TH_FIN 0x01
#define TH_SYN 0x02
#define TH_RST 0x04
#define TH_PUSH 0x08
#define TH_ACK 0x10
#define TH_URG 0x20
/* TCP header flag masks. */
#define URG 0x20 /* URGent flag */
#ifdef ACK
#undef ACK
#define ACK 0x10 /* ACKnowledgment flag */
#endif
#define PSH 0x08 /* PuSH flag */
#define RST 0x04 /* ReSeT flag */
#define SYN 0x02 /* SYNchronize flag */
#define FIN 0x01 /* FINal flag */
/************************
*** PUBLIC DATA TYPES ***
*************************/
typedef u_int32_t tcp_seq;
/*
* TCP header.
* Per RFC 793, September, 1981.
*/
#pragma pack(push,1)
struct _PACKED_ tcphdr
{
u_short th_sport; /* source port */
u_short th_dport; /* destination port */
tcp_seq th_seq; /* sequence number */
tcp_seq th_ack; /* acknowledgement number */
#if defined(ADL_TARGET_PLATFORM)&&(ADL_TARGET_PLATFORM==ADL_TARGET_LS808)
u_char th_x2_off;
#else
#if BYTE_ORDER == LITTLE_ENDIAN
u_char th_x2:4, /* (unused) */
th_off:4; /* data offset */
#endif
#if BYTE_ORDER == BIG_ENDIAN
u_char th_off:4, /* data offset */
th_x2:4; /* (unused) */
#endif
#endif
u_char th_flags;
#define TH_FIN 0x01
#define TH_SYN 0x02
#define TH_RST 0x04
#define TH_PUSH 0x08
#define TH_ACK 0x10
#define TH_URG 0x20
u_short th_win; /* window */
u_short th_sum; /* checksum */
u_short th_urp; /* urgent pointer */
};
#pragma pack(pop)
/*
* TCP header based on BSD codes modified for naming conventions.
*/
#pragma pack(push,1)
typedef struct _PACKED_ TCPHdr_s
{
u_int16_t srcPort; /* source port */
u_int16_t dstPort; /* destination port */
u_int32_t seq; /* sequence number */
u_int32_t ack; /* acknowledgement number */
#if defined(ADL_TARGET_PLATFORM)&&(ADL_TARGET_PLATFORM==ADL_TARGET_LS808)
u_char th_x2_off;
#else
#if BYTE_ORDER == LITTLE_ENDIAN
u_char th_x2:4, /* (unused) */
tcpOff:4; /* data offset */
#elif BYTE_ORDER == BIG_ENDIAN
u_char tcpOff:4, /* data offset */
th_x2:4; /* (unused) */
#else
ERROR: Byte order not defined!
#endif
#endif
u_char flags;
u_int16_t win; /* window */
u_int16_t ckSum; /* checksum */
u_int16_t urgent; /* urgent pointer */
} TCPHdr;
#pragma pack(pop)
/***********************
*** PUBLIC FUNCTIONS ***
************************/
#endif
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