www.pudn.com > zlIP-8051-rtl8019as.zip > ARP.h

/* 
 * Copyright (c) 2003 Electric Application Laboratory of NAN KAI University 
 * 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. The name of the author may not be used to endorse or promote products 
 *    derived from this software without specific prior written permission. 
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. 
 * 
 * Author: Li Zhanglin  
 * 
 */ 
 
/* arp */ 
 
/* arppacket->HardwareType */ 
#define ARP_HARDWARE_TYPE_ETHER 0x0001 
 
/* arppacket->ProtocolType */ 
#define ARP_PROTOCOL_TYPE_IP	0x0800 
 
#define ARP_HARDWARE_ADDR_LEN_ETHER	ETHER_ADDR_LEN 
#define ARP_PROTOCOL_ADDR_LEN_IP	sizeof(IP_ADDR) 
 
/* arppacket->type */ 
#define ARP_TYPE_ARP_REQUEST	0x0001 
#define ARP_TYPE_ARP_REPLY		0x0002 
#define ARP_TYPE_RARP_REQUEST	0x0003 
#define ARP_TYPE_RARP_REPLY		0x0004 
 
#define ARP_ENTRY_MAX_NUM		4		/* must <= 255 */ 
#define ARP_ENTRY_TIME_OUT		0xFFFF	/* the time for refresh a entry */ 
 
/* arp entry */ 
struct SARPEntry 
{ 
	IP_ADDR		IPAddr;			 
	BYTE	EtherAddr[ETHER_ADDR_LEN]; 
 
	/* decrease every time trick. when it hit to 0,  
	remove it from arp entry tabel. if time = 0 indicate 
	this entry is invalid*/ 
	WORD time;		 
}; 
 
/* arp packet struct */ 
struct SARPPacket 
{ 
	/* header */ 
	WORD HardwareType; 
	WORD ProtocolType; 
	BYTE HardWareAddrLen; 
	BYTE ProtocolAddrLen; 
	WORD type;				/* refer to arp type */ 
 
	/* arp content */ 
	BYTE	EtherScrAddr[ETHER_ADDR_LEN]; 
	IP_ADDR		IPScrAddr; 
	BYTE	EtherDestAddr[ETHER_ADDR_LEN]; 
	IP_ADDR		IPDestAddr; 
}; 
 
 
void ARPInit() REENTRANT_MUL; 
struct SMemHead DT_XDATA * ARPQuery(struct SNetIf DT_XDATA *NetIf,IP_ADDR DestIP) REENTRANT_SIG; 
struct SMemHead DT_XDATA *ARPInput(struct SMemHead DT_XDATA *MemHead, struct SNetIf DT_XDATA *NetIf) REENTRANT_MUL; 
void ARPAddEntry(struct SARPPacket DT_XDATA *ARPPacket)  REENTRANT_MUL; 
BOOL ARPFind(BYTE EtherAddr[],IP_ADDR IPAddr)  REENTRANT_SIG; 
void ARPTimer()  REENTRANT_MUL;