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arp.h
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arp.h
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/* Satrap/arp.h */
#ifndef ARP_H_
#define ARP_H_
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <pthread.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <net/ethernet.h>
#include <netpacket/packet.h>
#include <netinet/ether.h>
/* Sends an ARP request
sockfd is the file descriptor of the socket to use to send the
frame, should be a raw socket (AF_PACKET), which accepts ARP
(ETH_P_ALL or ETH_P_ARP)
ifindex is the index of the network interface
ipaddr is the source IP address
macaddr is the source MAC address
target_ip is the IP address to be queried via ARP
The function returns 0 upon success, EXIT_FAILURE otherwise.
*/
int send_arp_request(int sockfd, int ifindex, struct sockaddr_in *ipaddr, unsigned char *macaddr, struct in_addr target_ip);
/* Sends an ARP reply
sockfd: file descriptor of the socket
ifindex: index of the network interface
sender_ip: source IP address
sender_mac: source MAC address
target_ip: IP address to which the answer is destined
target_mac: MAC address of the target
The function returns 0 on success, or exits with EXIT_FAILURE.
*/
int send_arp_reply(int sockfd, int ifindex, struct sockaddr_in *sender_ip, unsigned char *sender_mac, struct in_addr target_ip, unsigned char *target_mac);
/* Listens to an ARP frame
sockfd: the socket file descriptor
result: the parsed ARP frame
Returns 0 if an ARP answer was found, -1 otherwise.
*/
int listen_arp_frame(int sockfd, struct ether_arp *result);
/* Scans the subnet by sending ARP requests. If a reply is received,
we know that the target is alive.
sockfd: socket file descriptor
ifindex: index of the interface
ipaddr: local IP address
macaddr: local hardware address
netmask: local netmask
Returns 0 when the scan is complete.
*/
int arp_scan(int sockfd, int ifindex, struct sockaddr_in *ipaddr, unsigned char *macaddr, struct sockaddr_in *netmask);
/* ARP man-in-the-middle attack.
sockfd: socket file descriptor
ifindex: index of the interface
ipaddr: local IP address
macaddr: local hardware address
target1_ip: IP address of the first target
target2_ip: IP address of the second target
Never returns, has to be killed by the user.
*/
int arp_mitm(int sockfd, int ifindex, struct sockaddr_in *ipaddr, unsigned char *macaddr, struct in_addr *target1_ip, struct in_addr *target2_ip);
#endif /* ARP_H_ */