BlueDataDistributor/firmware/arp.h (fd252ce) - bluebox · BlinkenArea

arp.h

/* BlueDataDistributor - data distribution module from ethernet to 32 serial ports
 * version 0.1.1 date 2006-10-07
 * Copyright (C) 2006 Stefan Schuermans <stefan@blinkenarea.org>
 * a BlinkenArea project - http://www.blinkenarea.org/
 */

#ifndef INC_arp
#define INC_arp

#include "ethernet.h"

// header of an ARP packet
struct ArpHeader
{
  unsigned short HwType;
  unsigned short ProtoType;
  unsigned char HwLen;
  unsigned char ProtoLen;
  unsigned short Op;
  unsigned char SrcMac[6];
  unsigned char SrcIp[4];
  unsigned char DestMac[6];
  unsigned char DestIp[4];
};

// an ARP packet
struct ArpPacket
{
  struct EthernetHeader EthHdr;
  struct ArpHeader ArpHdr;
};

// initialize
extern void ArpInit( void );

// tick procedure - call every 200ms
extern void ArpTick200( void );

// process a received ARP packet
extern void ArpRecv( unsigned char * pData, unsigned short Length );

// lookup the MAC for an IP address
// returns 0x00 in case of success, 0x01 if the MAC address is unknown
extern unsigned char ArpLookup( unsigned char * pIp, unsigned char * pMac );

#endif // #ifdef INC_arp

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