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arpw.cc

/* Output looks similar to tcpdump -p arp ;-)
 */
#include <usi++/usi++>
#include <usi++/arp.h>
#include <iostream>

using namespace usipp;

char *print_mac(unsigned char *mac)
{
        static char m[100];     // uhhh.... :)
        
        memset(m, 0, sizeof(m));
        snprintf(m, sizeof(m), "%02x:%02x:%02x:%02x:%02x:%02x", *mac, mac[1], mac[2], mac[3], mac[4], mac[5]);
        return m;
}


int main()
{

        ARP *a = new ARP;

        a->init_device("eth0", 1, 100);
            
        char shw[100], sip[100], dip[100];
        
        while (1) {
                a->sniffpack();
                if (a->get_op() == ARPOP_REQUEST) {
                        cout<<"arp who has "<<a->get_tpa(0, dip, 100)
                            <<" tell "<<a->get_spa(1, sip, 100)<<endl;
                }
                if (a->get_op() == ARPOP_REPLY) {
                        cout<<a->get_spa(0, sip, 100)<<" is at "
                            <<print_mac((unsigned char*)a->get_sha(shw, 100))<<endl;
                }
        }
        return 0;
}

        

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