NetInjector/promisc.c at master · JPGuillemin/NetInjector · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55

/*
 * name: promisc.c
 * this file is part of the "Net-Injector" project. It defines the set_promisc() function
 * Copyright (C) 2002 by Jean Philippe GUILLEMIN <jp.guillemin@free.fr>
 * license: This software is under GPL license
 * date: 04 17 2003
 * rev: 0.8
*/

#include "neti.h"


int set_promisc(int sock) {

	struct ifreq ifr;
	memset(&ifr, 0, IFREQ_SIZE);
	strncpy(ifr.ifr_name, myhdr->interface, 32);

		if (ioctl(sock, SIOCGIFFLAGS, &ifr) == 0){
			ifr.ifr_flags |= IFF_PROMISC;

			if (ioctl(sock, SIOCSIFFLAGS, &ifr) < 0){
				fprintf(stderr, "Error : cant set promiscuous mode !\n");
			}
		}else{
			fprintf(stderr, "Error : (set_promisc) in call to ioctl() !\n");
			return EXIT_FAILURE;
		}


return EXIT_SUCCESS;
}

int unset_promisc(int sock) {

	struct ifreq ifr;
	memset(&ifr, 0, IFREQ_SIZE);
	strncpy(ifr.ifr_name, myhdr->interface, 32);

		if (ioctl(sock, SIOCGIFFLAGS, &ifr) == 0){
			ifr.ifr_flags ^= IFF_PROMISC;

			if (ioctl(sock, SIOCSIFFLAGS, &ifr) < 0){
				fprintf(stderr, "Erroro : cant unset promiscuous mode !\n");
			}
		}else{
			fprintf(stderr, "Error : (unset_promisc) in call to ioctl() !\n");
			return EXIT_FAILURE;
		}


return EXIT_SUCCESS;
}