ip.h

这同样是FS8610相关的代码.看起来不错啊.

/**
 * \addtogroup t4socket T4 Socket API Layer
 * @{
 */

/**
 * \addtogroup iplayer IP Layer Configuration Function
 * @{
 */

 /**
  * \file ip.h
  * \brief IP Layer Function Declaration Header File.
  * \author Xiaofei Rui <[e-mail]>
  */
  
/*
******************************************************************************
*
Copyright (c) 2006 FameG Shanghai, Inc. All rights reserved.
*
This is unpublished proprietary source code of FameG Shanghai, Inc.
*
The copyright notice above does not evidence any actual or intended
*
publication of such source code.
******************************************************************************
*/
/*
******************************************************************************
*
Project: T4 Hardware TCP/IP
*
Filename: ip.h
*
Date:  28/02/2006
*
Purpose: IP Layer Function Declaration
*
Author: Xiaofei Rui
******************************************************************************
*/


#ifndef __IP_H__
#define __IP_H__

#include "kernel/system.h"

/***************************************************************************** 
*                          CONSTANT DEFINES                                                                         *
*****************************************************************************/

#define IP_HLEN     20  /**< IP Header length \hideinitializer */
#define IP_OPTLEN   40  /**< IP option length \hideinitializer */

/***************************************************************************** 
*                                       MACROS                                                                            *
*****************************************************************************/


/***************************************************************************** 
*                                       DATA TYPES                                                                      *
*****************************************************************************/

/**
 * a union of IP address in two formats.
 */
union ip_addr_u
{
	UINT32 bit32;   /**< IP address in 32bit format. */
	UINT8  bit8[4]; /**< IP address in 4byte format. */
};



/** The IP header structure. */
typedef struct ip_hdr_t{
	/* IP header. */
	UINT8 vhl,           /**< IP version and header length. */
	tos,                 /**< Type of Service. */
	len[2],              /**< The total length of the packet. */
	ipid[2],             /**< Identification of a packet. */
	ipoffset[2],         /**< Flags and fragment offset. */
	ttl,                 /**< Time to Live. */
	proto;               /**< Protocol of the packet capsulated in IP packet. */
	UINT16 ipchksum;     /**< Checksum of the IP packet. */
	UINT16 srcipaddr[2], /**< Source IP address of a IP packet. */
	destipaddr[2];       /**< Destination IP adress of a IP packet. */   
}ip_hdr;

/** The UDP header structure. */
typedef struct udp_hdr_t{  
	/* UDP header. */
	UINT16 srcport,   /**< Source port of a UDP packet. */
	destport,         /**< Destination port of a UDP packet. */
	len,              /**< Total length of a UDP packet. */
	chksum;           /**< Checksum of a UDP packet. */
} udp_hdr;

/** The TCP header structure. */
typedef struct tcp_hdr_t{  
	/* TCP header. */
	UINT16 srcport,   /**< Source port of a UDP packet. */
	destport;         /**< Destination port of a UDP packet. */
    UINT32 seq,       /**< Sequence number */
    ack;              /**< Acknowledgment Number */
	UINT16 offset,    /**< TCP data offset. */
	win,              /**< TCP window size. */
    chksum,           /**< TCP checksum */
    urgptr;              /**< TCP urgent pointer.*/
} tcp_hdr;


/***************************************************************************** 
*                    FUNCTIONS DECLARATION                                                                      *
*****************************************************************************/

extern INT8 ip_SetSrcIP(UINT32 ipaddr);
extern UINT32 ip_GetSrcIP(void);
extern void ip_SetGW(UINT32 gwaddr);
extern UINT32 ip_GetGW(void);
extern void ip_SetNetMask(UINT32 mask);
extern UINT32 ip_GetNetMask(void);
extern void ip_GWCtrl(BOOL clr, UINT8 timeoutval);
//extern void ip_ChksumCtrl(BOOL ipchkgen, BOOL udpchkgen);
extern UINT16 ip_chksum(UINT16 *sdata, UINT16 len);

#if IP_REASSEMBLY
//extern UINT16 ip_reass(void);
extern UINT16 ip_reass(UINT8 *rx_buf);
#endif /* IP_REASSEMBLY */


/***************************************************************************** 
*                   GLOBAL VARIABLES DECLARATION                                                            *
*****************************************************************************/

#if IP_REASSEMBLY
extern UINT8 ip_reassbuf[IP_REASS_BUFSIZE];
extern UINT8 ip_reasstmr;
#endif /* IP_REASSEMBLY */


#endif /* __IP_H__ */


/** @} */

/** @} */