arp.h

mc51单片机对rtl8019编程,实现ethernet的收发控制.

#ifndef ARP_H
#define ARP_H

#include "ethernet.h"

#define ARP_CACHE_LENGTH 10

typedef struct { 
	Uint8	ip_addr[INADDR_LEN];
	Uint8	mac_addr[ETH_ALEN];
	Uint8	TTL;
}Arp_cache_struc;

/* ARP protocol opcodes. */
#define	ARPOP_REQUEST	1		/* ARP request.  */
#define	ARPOP_REPLY	2		/* ARP reply.  */

typedef struct {
	Uint16 ar_hrd;		/* Format of hardware address.  */
   	Uint16 ar_pro;		/* Format of protocol address.  */
   	Uint8 ar_hln;		/* Length of hardware address.  */
   	Uint8 ar_pln;		/* Length of protocol address.  */
   	Uint16 ar_op;		/* ARP opcode (command).  */
}Arphdr_struc;

/* ARP protocol HARDWARE identifiers. */
#define ARPHRD_ETHER 	1		/* Ethernet 10/100Mbps.  */

// Ethernet Address Resolution Protocol.
typedef struct{
	Arphdr_struc ea_hdr;		/* fixed-size header */
	Uint8 arp_sha[ETH_ALEN];	/* sender hardware address */
	Uint8 arp_spa[INADDR_LEN];   /* sender protocol address */
	Uint8 arp_tha[ETH_ALEN];	/* target hardware address */
	Uint8 arp_tpa[INADDR_LEN];   /* target protocol address */
}Ether_arp_struc;


void arp_init();	
Bool arp_send(Uint16,  const Uint8*,  const Uint8*);
Bool arp_receive(Uint8 *pbuf);
Uint8* get_macaddr( const Uint8* );

#endif