/*#include    "platform.h"
#include    "arp.h"

#include    "enc28j60.h"
#include    "eth.h"*/


#include    "platform.h"
#include    "eth.h"
#include 	"enc28j60.h"
#include 	"ap.h"
#include 	"arp.h"
#include 	"icmp.h"
#include 	"ip.h"
#include 	"udp.h"
#include 	"stdlib.h"
#include 	"globals.h"



/* ==========================================================================
   Receive ARP packet and send response
*/
void arp (unsigned int len, unsigned char *buff) {
  unsigned char a;
  unsigned int txbuf;
  struct ARP_header *arp;
  arp = (struct ARP_header *)&buff[21];


   

  if ((Checkbroadcast() || Checkmymac() ) && Check_my_ip_arp()) {        // check broadcast MAC and my IP

   
    eth(buff);                                        // create response

    arp->Opcode = OP_REPLY;
    for (a = 0; a < 6; a++) {                         // swap arp_mac address
      arp->ARP_destMac[a] = arp->ARP_sourceMac[a];
      arp->ARP_sourceMac[a] = mymac[a];
    }

    for (a = 0; a < 4; a++) {                         // swap arp_ip address
      arp->ARP_destIp[a] = arp->ARP_sourceIp[a];
      arp->ARP_sourceIp[a] = myip[a];
    }

    if (!nic_tx_alloc(&txbuf)) return;                // write buffer to chip
    netbuf_wr_seek(txbuf, NB_SEEK_SET);
    netbuf_write(buff, len);
    netbuf_close();

    nic_tx(len);                                      // send
	//uart_send("vyslan ARP paket");
	}
}



/* ==========================================================================
   Check my IP address in ARP packet
*/
unsigned char Check_my_ip_arp (void) {
  if (buffer[38] == myip[0] && buffer[39] == myip[1] && buffer[40] == myip[2] && buffer[41] == myip[3]) {
    return 1;
  }
  return 0;
}