dimitri/Satrap
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Better initial MAC address query for MITM

Browse source
This commit is contained in:
Dimitri Lozeve 2016-06-03 16:44:51 +02:00
parent 599ce82e34
commit 47d05784f9
1 changed files with 25 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

27
arp_mitm.c
View file

@ -87,6 +87,29 @@ int main(int argc, char **argv)
printf("[OK] Index number of the Ethernet interface %s: %d\n", if_name, ifindex);
#endif
/* We get our IP address using ioctl() and SIOCGIFADDR */
struct ifreq ifraddr;
if (if_name_len < sizeof(ifraddr.ifr_name)) {
memcpy(ifraddr.ifr_name, if_name, if_name_len);
ifraddr.ifr_name[if_name_len] = 0;
}
else {
printf("[FAIL] Error: interface name is too long\n");
}
if (ioctl(sockfd, SIOCGIFADDR, &ifraddr) == -1) {
perror("[FAIL] ioctl()");
exit(EXIT_FAILURE);
}
struct sockaddr_in *ipaddr = (struct sockaddr_in *) &ifraddr.ifr_addr;
char local_ip_string[16];
if (!inet_ntop(AF_INET, &ipaddr->sin_addr, local_ip_string, sizeof(local_ip_string))) {
perror("[FAIL] inet_ntop()");
exit(EXIT_FAILURE);
}
#ifdef DEBUG
printf("[OK] Local IP address: %s\n", local_ip_string);
#endif
/* We get the MAC address using ioctl() (again) with SIOCGIFHWADDR */
struct ifreq ifrhwaddr;
if (if_name_len < sizeof(ifrhwaddr.ifr_name)) {
@ -121,7 +144,7 @@ int main(int argc, char **argv)
/* ====================================================================== */
send_arp_request(sockfd, ifindex, ipaddr2, macaddr, target1_ip);
send_arp_request(sockfd, ifindex, ipaddr, macaddr, target1_ip);
struct ether_arp reply1;
listen_arp_frame(sockfd, &reply1);
@ -130,7 +153,7 @@ int main(int argc, char **argv)
macaddr1[0],macaddr1[1],macaddr1[2],
macaddr1[3],macaddr1[4],macaddr1[5]);
send_arp_request(sockfd, ifindex, ipaddr1, macaddr, target2_ip);
send_arp_request(sockfd, ifindex, ipaddr, macaddr, target2_ip);
struct ether_arp reply2;
listen_arp_frame(sockfd, &reply2);
unsigned char *macaddr2 = reply2.arp_sha;