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struct ifreq ethreq;
/* Set the network card in promiscuos mode */
strncpy(ethreq.ifr_name,"eth0",IFNAMSIZ);
if (ioctl(sock,SIOCGIFFLAGS,&ethreq)==-1) {
perror("ioctl");
close(sock);
exit(1);
}
ethreq.ifr_flags|=IFF_PROMISC;
if (ioctl(sock,SIOCSIFFLAGS,&ethreq)==-1) {
perror("ioctl");
close(sock);
exit(1);
}

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  int x2;

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