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hping2

    1: /* 
    2:  * $smu-mark$ 
    3:  * $name: if_promisc.c$ 
    4:  * $author: Salvatore Sanfilippo <antirez@invece.org>$ 
    5:  * $copyright: Copyright (C) 1999 by Salvatore Sanfilippo$ 
    6:  * $license: This software is under GPL version 2 of license$ 
    7:  * $date: Fri Nov  5 11:55:48 MET 1999$ 
    8:  * $rev: 2$ 
    9:  */ 
   10: 
   11: #include <sys/types.h>
   12: #include <sys/ioctl.h>
   13: #include <string.h>
   14: #include <stdio.h>
   15: #include <netinet/in.h>
   16: #include <sys/socket.h>
   17: #include <net/if.h>
   18: 
   19: #include "hping2.h"
   20: #include "globals.h"
   21: 
   22: int if_promisc_on(int s)
   23: {
   24: 	struct ifreq ifr;
   25: 
   26: 	strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
   27: 	if ( ioctl(s, SIOCGIFFLAGS, &ifr) == -1) {
   28: 		perror("[open_sockpacket] ioctl(SIOCGIFFLAGS)");
   29: 		return -1;
   30: 	}
   31: 
   32: 	if (!(ifr.ifr_flags & IFF_PROMISC)) {
   33: 		ifr.ifr_flags |= IFF_PROMISC;
   34: 		if ( ioctl(s, SIOCSIFFLAGS, &ifr) == -1) {
   35: 			perror("[open_sockpacket] ioctl(SIOCSIFFLAGS)");
   36: 			return -1;
   37: 		}
   38: 	}
   39: 	return 0;
   40: }
   41: 
   42: int if_promisc_off(int s)
   43: {
   44: 	struct ifreq ifr;
   45: 
   46: 	strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
   47: 	if ( ioctl(s, SIOCGIFFLAGS, &ifr) == -1) {
   48: 		perror("[open_sockpacket] ioctl(SIOCGIFFLAGS)");
   49: 		return -1;
   50: 	}
   51: 
   52: 	if (ifr.ifr_flags & IFF_PROMISC) {
   53: 		ifr.ifr_flags ^= IFF_PROMISC;
   54: 		if ( ioctl(s, SIOCSIFFLAGS, &ifr) == -1) {
   55: 			perror("[open_sockpacket] ioctl(SIOCSIFFLAGS)");
   56: 			return -1;
   57: 		}
   58: 	}
   59: 	return 0;
   60: }