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first draft

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Alex
2022-04-13 18:01:39 +08:00
commit 906782e134
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if_promisc.c Normal file
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/*
* $smu-mark$
* $name: if_promisc.c$
* $author: Salvatore Sanfilippo <antirez@invece.org>$
* $copyright: Copyright (C) 1999 by Salvatore Sanfilippo$
* $license: This software is under GPL version 2 of license$
* $date: Fri Nov 5 11:55:48 MET 1999$
* $rev: 2$
*/
#include <sys/types.h>
#include <sys/ioctl.h>
#include <string.h>
#include <stdio.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <net/if.h>
#include "hping2.h"
#include "globals.h"
int if_promisc_on(int s)
{
struct ifreq ifr;
strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
if ( ioctl(s, SIOCGIFFLAGS, &ifr) == -1) {
perror("[open_sockpacket] ioctl(SIOCGIFFLAGS)");
return -1;
}
if (!(ifr.ifr_flags & IFF_PROMISC)) {
ifr.ifr_flags |= IFF_PROMISC;
if ( ioctl(s, SIOCSIFFLAGS, &ifr) == -1) {
perror("[open_sockpacket] ioctl(SIOCSIFFLAGS)");
return -1;
}
}
return 0;
}
int if_promisc_off(int s)
{
struct ifreq ifr;
strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
if ( ioctl(s, SIOCGIFFLAGS, &ifr) == -1) {
perror("[open_sockpacket] ioctl(SIOCGIFFLAGS)");
return -1;
}
if (ifr.ifr_flags & IFF_PROMISC) {
ifr.ifr_flags ^= IFF_PROMISC;
if ( ioctl(s, SIOCSIFFLAGS, &ifr) == -1) {
perror("[open_sockpacket] ioctl(SIOCSIFFLAGS)");
return -1;
}
}
return 0;
}