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

Send an ARP request to every IP on the subnet

Browse source
This commit is contained in:
Dimitri Lozeve 2016-05-27 11:01:16 +02:00
parent 88dfa6328d
commit a009462117
1 changed files with 25 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

24
arp_scan.c
View file

@ -139,6 +139,30 @@ int main(int argc, char **argv)
#endif
/* ====================================================================== */
/* Using the local IP address and netmask, we can loop on every IP
address on the subnet, and send to every one an ARP request. */
/* This counter will loop through every available IP address on the
current subnet */
unsigned long ip_counter = ntohl(ipaddr->sin_addr.s_addr) & ntohl(netmask->sin_addr.s_addr);
/* The maximum address on the subnet */
unsigned long ip_max = ip_counter + (~ntohl(netmask->sin_addr.s_addr));
while (ip_counter < ip_max) {
char ip_string[16];
struct in_addr target_ip;
target_ip.s_addr = htonl(ip_counter);
if (!inet_ntop(AF_INET, &target_ip.s_addr, ip_string, sizeof(ip_string))) {
perror("[FAIL] inet_ntop()");
exit(EXIT_FAILURE);
}
printf("[%s]\n", ip_string);
send_arp_request(sockfd, ifindex, ipaddr, macaddr, target_ip);
++ip_counter;
}
}