#include <stdio.h>
#include <net/ethernet.h>	// ether_header
#include <net/if_arp.h>		// arphdr
#include <string.h>	//memset()
#include <stdlib.h>


int main(int argc, char *argv[])
{
	struct ether_header *EthHdr;	
	
	struct arphdr *ArpHdr;	// This struct is the protocol independent part of the arp header

	struct arp_ext_header{		// Ethernet dependent part of arp
		unsigned char S_MAC[ETH_ALEN];	/* Sender hardware address.  */
    		unsigned char S_IP[4];		/* Sender IP address.  */
    		unsigned char D_MAC[ETH_ALEN];	/* Target hardware address.  */
    		unsigned char D_IP[4];		/* Target IP address.  */
	} *ArpExtHdr;
	//  __attribute__ ((__packed__)); 	// still in doubt if neccessary, but on a 32 bit
						// architecture it executed well without
	int packetsize;
	packetsize = sizeof(struct ether_header) + sizeof(struct arphdr) + sizeof(struct arp_ext_header);

	// Get some memory for the Ethernet Frame
	unsigned char packet[packetsize];
	// and initialize with zero
	memset(packet,0,packetsize);

	// Initialize header pointers
	EthHdr = (struct ether_header *)packet;
	ArpHdr = (struct arphdr *)(packet + sizeof(struct ether_header));
	ArpExtHdr = (struct arp_ext_header *)(packet + sizeof(struct ether_header) + sizeof(struct arphdr));

	// define MAC-Addresses 
	char SMAC[18] = "BB:BB:BB:BB:BB:BB";
	char DMAC[18] = "AA:AA:AA:AA:AA:AA";

	// define IP-Addresses
	char SIP[18] = "12.12.111.111";
	char DIP[18] = "222.222.13.13";

	// This line is going to cause the seg fault
	memcpy(EthHdr->ether_shost,(const void *)ether_aton(SMAC),ETHER_ADDR_LEN);
	printf("This is only printed, if there was no seg fault\n");

printf("Exit_Success\n");
return 0;
}

#include <netinet/ether.h>