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fake_solicitate6.c
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fake_solicitate6.c
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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) 2018 by %s %s\n\n", prg, VERSION, AUTHOR, RESOURCE);
printf("Syntax: %s [-DHF] interface ip-address-solicitated [target-address [mac-address-solicitated [source-ip-address]]]\n\n", prg);
printf("Solicate IPv6 address on the network, sending it to the all-nodes multicast address\n");
// printf("Option -H adds a hop-by-hop header, -F a one shot fragment header,\n");
// printf("-D adds a large destination header which fragments the packet.\n");
// printf("Use -r to use raw mode.\n\n");
exit(-1);
}
int main(int argc, char *argv[]) {
unsigned char *pkt1 = NULL, buf[24], buf2[6], buf3[1500];
unsigned char *unicast6, *src6 = NULL, *dst6 = NULL, srcmac[16] = "", *mac = srcmac;
int pkt1_len = 0, flags, prefer = PREFER_GLOBAL, i, do_hop = 0, do_dst = 0, do_frag = 0, cnt, type = NXT_ICMP6, offset = 14;
char *interface;
int rawmode = 0;
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, "DFHr")) >= 0) {
switch (i) {
case 'r':
thc_ipv6_rawmode(1);
rawmode = 1;
break;
case 'F':
do_frag++;
break;
case 'H':
do_hop = 1;
break;
case 'D':
do_dst = 1;
break;
default:
fprintf(stderr, "Error: invalid option %c\n", i);
exit(-1);
}
}
if (argc - optind < 2)
help(argv[0]);
if (do_hdr_size)
offset = do_hdr_size;
interface = argv[optind];
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 solicitate: %s\n", argv[optind + 2]);
exit(-1);
}
if (rawmode == 0) {
if (argc - optind >= 4 && argv[optind + 3] != NULL)
sscanf(argv[optind + 3], "%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]);
else
mac = thc_get_own_mac(interface);
}
if (argc - optind >= 5 && argv[optind + 4] != NULL)
src6 = thc_resolve6(argv[optind + 4]);
else
src6 = thc_get_own_ipv6(interface, NULL, PREFER_LINK);
if (mac == NULL || src6 == NULL) {
fprintf(stderr, "Error: invalid interface %s or invalid mac/ip defined\n", interface);
exit(-1);
}
memset(buf, 0, sizeof(buf));
memcpy(buf, unicast6, 16);
buf[16] = 1;
buf[17] = 1;
memcpy(&buf[18], mac, 6);
flags = 0; // ICMP6_NEIGHBORADV_OVERRIDE;
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_NEIGHBORSOL, 0, flags, (unsigned char *) &buf, 24, 0) < 0)
return -1;
if (thc_generate_pkt(interface, mac, NULL, pkt1, &pkt1_len) < 0) {
fprintf(stderr, "Error: Can not generate packet, exiting ...\n");
exit(-1);
}
printf("Starting solicitation of %s (Press Control-C to end)\n", argv[optind + 1]);
while (1) {
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);
} else {
thc_send_pkt(interface, pkt1, &pkt1_len);
}
sleep(5);
}
return 0;
}