pseudo.cpp

//pseudo-code for arp-spoofing

class ARP_packet {

	char* ethersrc;
	char* etherdest;
	char* arpop;

	...

}

 sendPacket()

char* getSenderMac(){
	
	return senderMac;
}

void receivePacket(){ // not good .. it's better not to extract code as func.
	
	if(ehdr->ether_type == 0x0800){
		ihdr = (struct ihdr *)packet0;
	} else if(ehdr->ether_type == 0x86DD){
		ihdr6 = (struct ihdr6 *)packet0;
	} else if(ehdr->ether_type == 0x0806){
		ahdr6 = (struct ahdr6 *)packet0;
	} 

	sprintf();
}

int getSomeoneMacAddr(){
	// Stage1
	ARP_packet arp1 = new ARP_packet(ethersrc, etherdest, arpop, ..);
	send_packet(arp1, .. );

	// Stage2
	receivePakcet();	// while(1) .. // get sender's Mac
}

int main(int argc, char* argv[]){
	
	char* victimMacAddr = getSomeoneMacAddr();
	char* targetMacAddr = getSomeoneMacAddr();
	
	while(true){
		// Stage3
		ARP_packet arp_attack1 = new ARP_packet(ethersrc, etherdest, arpop, ..);
		send_packet(arp_attack1, .. );
	
		// Stage4
		char* result = receivePacket(); 
		// while(1) ... // get spoofed IP packet

		IP_packet ip1 = new IP_packet(result, ... ); 

		// Stage5
		send_packet(ip1, ... );

		// Stage6
		receivePacket(); // while(1) .. 
		// get ARP unicast packet
		// get ARP broadcast packet 	
		// packet in order to update its arp-table 
		// if ARP unicast packet -> reply -> still do while
		// if ARP broadcast packet -> break while -> do again

		// Stage7
		ARP_packet arp_unicast = new ARP_packet(ethersrc, etherdest, ..);
		send_packet(arp_unicast, ... );

		// Stage8
		ARP_packet arp_attack2 = new ARP_packet(ethersrc, etherdest, ..);
		send_packet(arp_attack2, ... );
	}

}

// wireshark filter command
// arp || eth.addr == 00:0c:29:f2:41:76 || eth.addr == a0:c5:89:77:cb:03