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alive6.c
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alive6.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 <netdb.h>
#include <pcap.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include "thc-ipv6.h"
#include "fps.h"
#define MAX_ALIVE 65536
#define MAX_NETS 1024
#define MAX_VENDID 64
#define MAX_PORTS 256
#define MAX_FOUR 16
#define TCP_OPT_LEN 28 // 20
#define FPS_INVALID "invalid packet data"
#define FPS_UNKNOWN "unknown"
#define RESP_PONG "ICMP echo-reply"
#define RESP_UNREACH_PORT "ICMP port unreachable"
#define RESP_UNREACH_ROUTE "ICMP network unreachable"
#define RESP_UNREACH_FW "ICMP firewalled unreachable"
#define RESP_UNREACH_OOSCOPE "ICMP out of scope unreachable"
#define RESP_UNREACH_ADDR "ICMP host unreachable"
#define RESP_UNREACH_GRESS "ICMP ingress/egress filter unreachable"
#define RESP_UNREACH_REJECT "ICMP route reject unreachable"
#define RESP_TOOBIG "ICMP packet too big"
#define RESP_TTLEXCEED "ICMP TTL exceeded"
#define RESP_REDIR "ICMP local router traffic redirect"
#define RESP_PARAMPROB "ICMP parameter problem"
#define RESP_ERROR "ICMP error"
#define RESP_UDP "UDP"
#define RESP_SYNACK "TCP SYN-ACK"
#define RESP_RST "TCP RST"
#define RESP_ACK "TCP ACK"
#define RESP_OTHER "TCP misc-options"
#define RESP_UNKNOWN "unknown"
extern int _thc_ipv6_rawmode;
struct fingerprint {
char OS[1024];
char FP[200];
};
static char _fingerprint[4096]; // not thread safe!
unsigned char buf[8], *alive[MAX_ALIVE], *tagging = NULL;
int alive_no = 0, resolve = 0, waittime = 1, portscan = 0, curr = 0, list = 0, slow = 0;
int synports[MAX_PORTS], ackports[MAX_PORTS], udpports[MAX_PORTS];
int ndp_only = 0, do_ping = 1, do_dst = 1, do_hop = 0, verbose = 0, srcport = -1, do_help = 0, do_hopcount = 0, still_not_there = 0, rst_means_alive = 1;
unsigned long int tcount = 0;
FILE *out = NULL;
struct hostent *he = NULL;
short int si, sp, sp2;
// all dict entries must start with a single from/to 0,0,0,0
// and end with a single from/to ffff,ffff,ffff,ffff
unsigned short int dict_small[] = { 0, 0, 0, 0, /*to */ 0, 0, 0, 0,
0, 0, 0, 1, /*to */ 0, 0, 0, 0x2ff, // 1975 tests
0, 0, 0, 0x300, /*to */ 0, 0, 0, 0x305,
0, 0, 0, 0x400, /*to */ 0, 0, 0, 0x405,
0, 0, 0, 0x443, /*to */ 0, 0, 0, 0x445,
0, 0, 0, 0x500, /*to */ 0, 0, 0, 0x505,
0, 0, 0, 0x530, /*to */ 0, 0, 0, 0x53f,
0, 0, 0, 0x555, /*to */ 0, 0, 0, 0x555,
0, 0, 0, 0x600, /*to */ 0, 0, 0, 0x605,
0, 0, 0, 0x666, /*to */ 0, 0, 0, 0x667,
0, 0, 0, 0x700, /*to */ 0, 0, 0, 0x703,
0, 0, 0, 0x800, /*to */ 0, 0, 0, 0x803,
0, 0, 0, 0x900, /*to */ 0, 0, 0, 0x903,
0, 0, 0, 0xaaa, /*to */ 0, 0, 0, 0xaaa,
0, 0, 0, 0xc38, /*to */ 0, 0, 0, 0xc38,
0, 0, 0, 0x9dd, /*to */ 0, 0, 0, 0x9dd,
0, 0, 0, 0xff0, /*to */ 0, 0, 0, 0xfff,
0, 0, 0, 0x1000, /*to */ 0, 0, 0, 0x1111,
0, 0, 0, 0x1337, /*to */ 0, 0, 0, 0x1337,
0, 0, 0, 0x14e9, /*to */ 0, 0, 0, 0x14e9,
0, 0, 0, 0x1a0b, /*to */ 0, 0, 0, 0x1a0b,
0, 0, 0, 0x1f40, /*to */ 0, 0, 0, 0x1f40,
0, 0, 0, 0x1f90, /*to */ 0, 0, 0, 0x1f90,
0, 0, 0, 0x2000, /*to */ 0, 0, 0, 0x2111,
0, 0, 0, 0x3000, /*to */ 0, 0, 0, 0x3011,
0, 0, 0, 0x3128, /*to */ 0, 0, 0, 0x3128,
0, 0, 0, 0x2525, /*to */ 0, 0, 0, 0x2525,
0, 0, 0, 0x5353, /*to */ 0, 0, 0, 0x5353,
0, 0, 0, 0x6666, /*to */ 0, 0, 0, 0x6667,
0, 0, 0, 0x8000, /*to */ 0, 0, 0, 0x8000,
0, 0, 0, 0x8080, /*to */ 0, 0, 0, 0x8080,
0, 0, 0, 0xaaaa, /*to */ 0, 0, 0, 0xaaaa,
0, 0, 0, 0xabcd, /*to */ 0, 0, 0, 0xabcd,
0, 0, 0, 0xbabe, /*to */ 0, 0, 0, 0xbabe,
0, 0, 0, 0xbeef, /*to */ 0, 0, 0, 0xbeef,
0, 0, 0, 0xcafe, /*to */ 0, 0, 0, 0xcafe,
0, 0, 0, 0xc0de, /*to */ 0, 0, 0, 0xc0de,
0, 0, 0, 0xdead, /*to */ 0, 0, 0, 0xdead,
0, 0, 0, 0xf500, /*to */ 0, 0, 0, 0xf500,
0, 0, 0, 0xfeed, /*to */ 0, 0, 0, 0xfeed,
0, 0, 0, 0xfff0, /*to */ 0, 0, 0, 0xffff,
0, 0, 1, 0, /*to */ 0, 0, 1, 0x1ff,
0, 0, 2, 0, /*to */ 0, 0, 0x1bb, 5,
0, 0, 2, 6, /*to */ 0, 0, 9, 9,
0, 0, 2, 0xa, /*to */ 0, 0, 2, 0x20,
0, 0, 2, 0x21, /*to */ 0, 0, 3, 0x21,
0, 0, 2, 0x22, /*to */ 0, 0, 3, 0x22,
0, 0, 2, 0x25, /*to */ 0, 0, 9, 0x25,
0, 0, 2, 0x50, /*to */ 0, 0, 9, 0x50,
0, 0, 2, 0x53, /*to */ 0, 0, 9, 0x53,
0, 0, 2, 0x80, /*to */ 0, 0, 9, 0x80,
0, 0, 2, 0x1bb, /*to */ 0, 0, 9, 0x1bb,
0, 0, 2, 0x500, /*to */ 0, 0, 9, 0x500,
// 0, 0, 0xa, 0, /*to */ 0, 0, 0xf, 2,
0, 0, 0x80, 6, /*to */ 0, 0, 0x80, 0x1f,
0, 0, 0x200, 0, /*to */ 0, 0, 0x200, 3,
0, 0, 0x389, 0, /*to */ 0, 0, 0x389, 3,
0, 0, 0x443, 0, /*to */ 0, 0, 0x443, 3,
0, 0, 0x500, 0, /*to */ 0, 0, 0x500, 2,
0, 0, 0x666, 0, /*to */ 0, 0, 0x669, 2,
0, 0, 0x3128, 0, /*to */ 0, 0, 0x3128, 3,
0, 0, 0x6666, 0, /*to */ 0, 0, 0x6669, 2,
0, 0, 0x8080, 0, /*to */ 0, 0, 0x8080, 3,
0, 0, 0xdead, 0xbeef, /*to */ 0, 0, 0xdead, 0xbeef,
// 0, 1, 0, 0, /*to */ 0, 3, 3, 3,
0, 0, 0, 0, /*to */ 4, 4, 4, 4, // 24 doubles here == 0.42%
1, 0, 0, 5, /*to */ 1, 0, 0, 0xf,
// 2, 0, 1, 0, /*to */ 2, 0, 1, 3,
2, 0, 0, 5, /*to */ 2, 0, 0, 0xd,
// 1, 2, 3, 4, /*to */ 1, 2, 3, 4,
5, 0, 0, 1, /*to */ 0xff, 0, 0, 2,
0xffff, 0x00ff, 0xfe00, 0xfffe, /*to */ 0xffff, 0x00ff, 0xfe00, 0xffff,
0xffff, 0xffff, 0xffff, 0xfffe, /*to */ 0xffff, 0xffff, 0xffff, 0xfffe,
0xffff, 0xffff, 0xffff, 0xffff, /*to */ 0xffff, 0xffff, 0xffff, 0xffff
};
unsigned short int dict_large[] = { 0, 0, 0, 0, /*to */ 0, 0, 0, 0,
0, 0, 0, 1, /*to */ 0, 0, 1, 0x2fff, // 1975 tests
0, 0, 0, 0x3000, /*to */ 0, 0, 1, 0x3333,
0, 0, 0, 0x5353, /*to */ 0, 0, 2, 0x5353,
0, 0, 0, 0x6666, /*to */ 0, 0, 2, 0x6667,
0, 0, 0, 0x8000, /*to */ 0, 0, 2, 0x8000,
0, 0, 0, 0x8080, /*to */ 0, 0, 2, 0x8080,
0, 0, 0, 0xaaaa, /*to */ 0, 0, 2, 0xaaaa,
0, 0, 0, 0xabcd, /*to */ 0, 0, 2, 0xabcd,
0, 0, 0, 0xbabe, /*to */ 0, 0, 2, 0xbabe,
0, 0, 0, 0xbeef, /*to */ 0, 0, 2, 0xbeef,
0, 0, 0, 0xcafe, /*to */ 0, 0, 2, 0xcafe,
0, 0, 0, 0xc0de, /*to */ 0, 0, 2, 0xc0de,
0, 0, 0, 0xdead, /*to */ 0, 0, 2, 0xdead,
0, 0, 0, 0xf500, /*to */ 0, 0, 2, 0xf500,
0, 0, 0, 0xfeed, /*to */ 0, 0, 2, 0xfeed,
0, 0, 0, 0xfff0, /*to */ 0, 0, 2, 0xffff,
0, 0, 2, 0, /*to */ 0, 0, 0x1bb, 5,
0, 0, 2, 0x11, /*to */ 0, 0, 2, 0x100,
0, 0, 2, 0x1bb, /*to */ 0, 0, 9, 0x1bb,
0, 0, 2, 0x500, /*to */ 0, 0, 9, 0x500,
0, 0, 2, 6, /*to */ 0, 0, 10, 10,
0, 0, 0xa, 0, /*to */ 0, 0, 0xf, 5,
0, 0, 0x80, 6, /*to */ 0, 0, 0x80, 0x1f,
0, 0, 0x200, 0, /*to */ 0, 0, 0x200, 5,
0, 0, 0x389, 0, /*to */ 0, 0, 0x389, 5,
0, 0, 0x443, 0, /*to */ 0, 0, 0x443, 5,
0, 0, 0x500, 0, /*to */ 0, 0, 0x500, 5,
0, 0, 0x666, 0, /*to */ 0, 0, 0x669, 5,
0, 0, 0x3128, 0, /*to */ 0, 0, 0x3128, 5,
0, 0, 0x6666, 0, /*to */ 0, 0, 0x6669, 5,
0, 0, 0x8080, 0, /*to */ 0, 0, 0x8080, 5,
0, 0, 0xdead, 0xbeef, /*to */ 0, 0, 0xdead, 0xbeef,
// 0, 1, 0, 0, /*to */ 0, 3, 3, 3,
0, 0, 0, 0, /*to */ 5, 5, 5, 5, // some doubles here
1, 0, 0, 6, /*to */ 1, 0, 0, 0x10,
// 2, 0, 1, 0, /*to */ 2, 0, 1, 3,
2, 0, 0, 5, /*to */ 2, 0, 0, 0x10,
// 1, 2, 3, 4, /*to */ 1, 2, 3, 4,
6, 0, 0, 0, /*to */ 0xff, 0, 0, 2,
0xffff, 0x00ff, 0xfe00, 0xfffe, /*to */ 0xffff, 0x00ff, 0xfe00, 0xffff,
0xffff, 0xffff, 0xffff, 0xfffe, /*to */ 0xffff, 0xffff, 0xffff, 0xfffe,
0xffff, 0xffff, 0xffff, 0xffff, /*to */ 0xffff, 0xffff, 0xffff, 0xffff
};
unsigned short int *dict = NULL;
unsigned char tcp_opt[TCP_OPT_LEN] = {
0x02, 0x04, 0xff, 0xff, 0x04, 0x02, 0x08, 0x0a, 0x00, 0x09,
0x00, 0x09, 0x00, 0x00, 0x00, 0x00, 0x01, 0x03, 0x03, 0xff,
0x06, 0x06, 0xb0, 0x0b, 0xba, 0xbe, 0x01, 0x01
};
// more keywords:
// cafe, dead, beef, affe, b00b, babe, f00, fefe, ffff, 1337, 666, 0, 1
void help(char *prg) {
printf("%s %s (c) 2019 by %s %s\n\n", prg, VERSION, AUTHOR, RESOURCE);
printf ("Syntax: %s [-CFHLMPSdlpvV] [-I srcip6] [-i file] [-o file] [-e opt] [-s port,..] [-a port,..] [-u port,..] [-T tag] [-W TIME] interface [unicast-or-multicast-address [remote-router]]\n\n", prg);
printf("Options:\n");
if (do_help) printf(" Output Options:\n");
printf(" -i file check systems from input file\n");
printf(" -o file write results to output file\n");
if (do_help) printf(" -v verbose information (twice: detailed, thrice: dumping packets)\n");
if (do_help > 1) printf(" -V enable debug output\n");
printf(" -d DNS resolve alive IPv6 addresses\n");
if (do_help > 1) printf(" -H print hop count of received packets\n");
if (do_help) printf(" Enumerate Options:\n");
printf(" -M enumerate hardware addresses (MAC) from input addresses (slow!)\n");
printf(" -C enumerate common addresses of input networks, -CC for large scan\n");
printf(" -4 ipv4/range test various IPv4 address encodings per network (eg 1.2.3.4/24)\n");
if (do_help > 1) printf(" -y step for range scans (2000::0-f), define the step range (default: 1)\n");
if (do_help) printf(" Alive Technique Options:\n");
printf(" -p send a ping packet for alive check (default)\n");
printf(" -e dst,hop send an errornous packets: destination (default), hop-by-hop\n");
printf(" -s port,port,.. TCP-SYN packet to ports for alive check or \"portscan\"\n");
printf(" -a port,port,.. TCP-ACK packet to ports for alive check\n");
printf(" -u port,port,.. UDP packet to ports for alive check\n");
if (do_help) printf(" -F firewall mode: -p -e dst -u 53 -s 22,25,80,443,9511 -a 9511\n");
if (do_help > 1) printf(" -R do not consider TCP-RST as alive (good with firewalls, e.g. -F)\n");
if (do_help) printf(" Sending Options\n");
if (do_help) {
printf(" -n number how often to send each packet (default: local 1, remote 2)\n");
printf(" -W time time in ms to wait after sending a packet (default: %d)\n", waittime);
printf(" -S slow mode, get best router for each remote target or when proxy-NA\n");
printf(" -I src[/mask] use the specified IPv6 address as source. Use mask for random.\n");
printf(" -l use link-local address for multicast addresses instead of global\n");
printf(" -P only print addresses that would be scanned, no packets are sent!\n");
if (do_help > 1) {
printf(" -L local mode - perform only NDP and report local systems alive\n");
printf(" -r renew IPv6 src address for every new target (waits if none there)\n");
printf(" -T tag put tag string in ICMP packets\n");
printf(" -x port TCP/UDP src port for -s, -a and -u\n");
printf(" -Z mac use given destination mac address\n");
}
printf(" -m raw mode (for network adapters where you do not have Ethernet)\n");
}
if (do_help == 1) {
printf(" Help Options:\n");
printf(" -hh show even more options\n");
} else
printf(" -h to display more command line options and help (-hh: more options)\n");
printf("\nTarget address on command line or in input file can include ranges in the form\n");
printf("of 2001:db8::1-fff or 2001:db8::1-2:0-ffff:0:0-ffff, etc.\n");
if (do_help) {
printf("Do not use the ranges (from-to) option with -M, -C or -4.\n");
printf("If you use SYN packets (-s/-F option), automatic OS detection is performed.\n");
// printf("If you specify a remote router, fragmentation+srcroute is performed.\n");
printf("Returns -1 on errors, 0 if a system was found alive or 1 if nothing was found.\n");
}
exit(-1);
}
/*****************************************************************************************/
/*
Copyright (c) warlord @ nologin.org. All rights reserved.
For more information, please visit http://www.nologin.org
*/
char *get_OS(char *query_fp) {
int i = 0;
for (i = 0; i < sizeof(fingerprintsArray) / sizeof(fingerprintsArray[0]); i++) {
if (strcmp(fingerprintsArray[i].fingerprint, query_fp) == 0)
return fingerprintsArray[i].OS;
}
return FPS_UNKNOWN;
}
char *warlord_checkFingerprint(char *buffer, int len) {
char *os, *end, *ptr, ip_mod, ip_ver = 0, ip_hdr_size = 0;
ip_ver = (((unsigned char)buffer[0] & 0xf0) >> 4);
if (ip_ver == 4) {
ip_mod = 0;
ip_hdr_size = ((buffer[0] & 0x0f) << 2);
} else if (ip_ver == 6) {
ip_mod = 20; // to align packet sizes in FPS with IPv4 for IPv6 (would be 40 bytes - 20 = 20 equals to IPv4)
ip_hdr_size = 40;
}
if (ip_ver == 0 || (len - ip_hdr_size) < 20 || ip_hdr_size < 20 || ip_hdr_size > 40) // invalid ip version or packet too short?
return FPS_INVALID;
snprintf(_fingerprint, sizeof(_fingerprint) - 1, "%04x:%02x:%04x",
len + 20 - ip_hdr_size, // total length (calculated with assumed ipv4 header
(unsigned char) buffer[ip_hdr_size + 12], // header length
ntohs(*(in_port_t *) &buffer[ip_hdr_size + 14])); // window size
//So what kind of tcp options did we receive?
//This is being used for OS fingerprinting
end = &buffer[len];
if (len > ip_hdr_size + (unsigned char) buffer[ip_hdr_size + 12])
end = &buffer[ip_hdr_size + (unsigned char) buffer[ip_hdr_size + 12]];
for (ptr = &buffer[ip_hdr_size + 20]; ptr < end; ) {
switch (*ptr) {
case 0x0: // end of options
ptr = end;
break;
case 0x1: // some pad entire options portion with NOP to keep response option size the same
strncat(_fingerprint, ":NOP", sizeof(_fingerprint) - strlen(_fingerprint) - 1);
ptr++;
break;
case 0x2: // segment size
snprintf(&_fingerprint[strlen(_fingerprint)], sizeof(_fingerprint) - strlen(_fingerprint), ":SS%04x", ntohs(*(in_port_t *) (ptr + 2)));
ptr += 4;
break;
case 0x3: // window scaling
strncat(_fingerprint, ":WSxx", sizeof(_fingerprint) - strlen(_fingerprint) - 1);
ptr += 3;
break;
case 0x4: // Sack Permitted / Sack Denied
switch (ptr[1]) {
case 0x2:
strncat(_fingerprint, ":SP", sizeof(_fingerprint) - strlen(_fingerprint) - 1);
break;
default:
strncat(_fingerprint, ":SD", sizeof(_fingerprint) - strlen(_fingerprint) - 1);
break;
}
ptr += 2;
break;
case 0x6: // echo request
strncat(_fingerprint, ":PI", sizeof(_fingerprint) - strlen(_fingerprint) - 1);
ptr += 6;
break;
case 0x7: // echo reply
strncat(_fingerprint, ":PO", sizeof(_fingerprint) - strlen(_fingerprint) - 1);
ptr += 6;
break;
case 0x8: // Time stamp
strncat(_fingerprint, ":TS", sizeof(_fingerprint) - strlen(_fingerprint) - 1);
ptr += 10;
break;
default: // unknown
snprintf(&_fingerprint[strlen(_fingerprint)], sizeof(_fingerprint) - strlen(_fingerprint), ":UOP%02x", (unsigned char)(*ptr));
ptr += (unsigned char)ptr[1];
break;
}
}
_fingerprint[sizeof(_fingerprint) - 1] = 0;
// printf ("%s\t\tport %5d\t", inet_ntoa (src), ntohs (recvtcp->source));
os = get_OS(_fingerprint);
if (strcmp(os, FPS_UNKNOWN) == 0)
return _fingerprint;
return os;
}
/* end of warlords code */
/**************************************************************************/
void check_packets(u_char *foo, const struct pcap_pkthdr *header, const unsigned char *data) {
int i, ok = 0, len = header->caplen, offset = 0, nxt;
unsigned char *ptr = (unsigned char *) data, *p1, *p2, *p3, sport[16] = "", *orig_dst = NULL;
char *type = RESP_UNKNOWN, hopcount[20] = "", *os = NULL;
if (do_hdr_size) {
ptr += do_hdr_size;
len -= do_hdr_size;
if ((ptr[0] & 240) != 0x60)
return;
} else if (_thc_ipv6_rawmode == 0) {
ptr += 14;
len -= 14;
}
if (debug)
thc_dump_data(ptr, len, "Received Packet");
if (len < 48 + sizeof(buf))
return;
nxt = ptr[6];
// if the destination system sends source routed packets back, unlikely though
// if (ptr[6] == NXT_ROUTE)
// if ((offset = (ptr[41] + 1) * 8) + 48 + sizeof(buf) > len)
// return;
if (ptr[6 + offset] == NXT_FRAG) {
nxt = ptr[40 + offset];
offset += 8;
}
if (still_not_there == 1)
still_not_there = 0;
if (nxt == NXT_ICMP6 && (do_ping || do_dst || do_hop || udpports[0] != -1)) {
if (ptr[40 + offset] == ICMP6_PINGREPLY && (do_ping || do_dst || do_hop)) {
if (tagging == NULL) {
if (memcmp(ptr + 50 + offset, (char *) &si + _TAKE2, 2) == 0) {
ok = 1;
type = RESP_PONG;
}
} else {
//printf("TAG: %s\n", ptr + 48 + offset);
if (memcmp(ptr + 48 + offset, (char *) tagging, strlen(tagging)) == 0) {
ok = 1;
type = RESP_PONG;
}
}
} else // if not a ping reply, its an error packet and the size is larger
if (len < 96 + sizeof(buf))
return;
if (ptr[40 + offset] == ICMP6_PARAMPROB && (do_dst || do_hop))
if (memcmp(ptr + len - 4, (char *) &si + _TAKE2, 2) == 0) {
if (list == 0 && do_hop)
ok = 2;
else
ok = 1;
type = RESP_PARAMPROB;
}
if (ptr[40 + offset] == ICMP6_UNREACH && ptr[41 + offset] == 4 && udpports[0] != -1)
if (memcmp(ptr + 88 + offset, (char *) &sp2 + _TAKE2, 2) == 0) {
ok = 1;
type = RESP_UNREACH_PORT;
i = (ptr[90 + offset] << 8) + ptr[91 + offset];
snprintf(sport, sizeof(sport), "%d/", i);
}
}
if (nxt == NXT_UDP && udpports[0] != -1)
if (memcmp(ptr + 42 + offset, (char *) &sp2 + _TAKE2, 2) == 0) {
ok = 1;
type = RESP_UDP;
}
if (nxt == NXT_TCP && (portscan || synports[0] != -1 || ackports[0] != -1))
if (memcmp(ptr + 42 + offset, (char *) &sp2 + _TAKE2, 2) == 0) {
ok = 1;
i = ptr[41 + offset] + (ptr[40 + offset] << 8);
snprintf(sport, sizeof(sport), "%d/", i);
switch (ptr[53 + offset]) {
case (TCP_SYN + TCP_ACK):
os = warlord_checkFingerprint(ptr, len);
type = RESP_SYNACK;
break;
case TCP_ACK:
type = RESP_ACK;
break;
case TCP_RST: /* fall through */
case (TCP_RST + TCP_ACK):
type = RESP_RST;
if (rst_means_alive == 0)
ok = 0;
break;
default:
type = RESP_OTHER;
}
}
if (ok == 0 && nxt == NXT_ICMP6) {
ok = 2;
switch (ptr[40 + offset]) {
case 1:
switch (ptr[41 + offset]) {
case 0:
type = RESP_UNREACH_ROUTE;
break;
case 1:
type = RESP_UNREACH_FW;
break;
case 2:
type = RESP_UNREACH_OOSCOPE;
break;
case 3:
type = RESP_UNREACH_ADDR;
break;
case 4:
type = RESP_UNREACH_PORT;
break;
case 5:
type = RESP_UNREACH_GRESS;
break;
case 6:
type = RESP_UNREACH_REJECT;
break;
default:
ok = 0;
}
break;
case 2:
type = RESP_TOOBIG;
break;
case 3:
type = RESP_TTLEXCEED;
break;
case 4:
type = RESP_PARAMPROB;
break;
case 137:
type = RESP_REDIR;
break;
default:
ok = 0;
}
if (ok == 0) {
if (slow == 0 || ptr[40] != ICMP6_NEIGHBORADV) {
type = RESP_ERROR;
snprintf(sport, sizeof(sport), "%d:%d/", ptr[40], ptr[41]);
ok = 2;
}
} else
orig_dst = thc_ipv62notation(ptr + 64 + offset + 8);
}
i = 0;
if (verbose < 2)
while (ok && i < alive_no) {
if (memcmp(alive[i], ptr + 8 + offset, 16) == 0)
ok = 0;
i++;
}
if (ok) {
if (do_hopcount)
sprintf(hopcount, " {hop count: %d}", ptr[7]);
if (portscan == 0 || (portscan && (verbose > 2 || (strcmp(type, RESP_UNREACH_PORT) != 0 && strcmp(type, RESP_UNREACH_FW) != 0)))) {
if (resolve)
he = gethostbyaddr(ptr + 8, 16, AF_INET6);
p2 = thc_ipv62notation(ptr + 8);
printf("Alive: %s%s%s%s [%s%s%s%s]%s%s%s%s\n", p2, resolve ? " (" : "", resolve
&& he != NULL ? he->h_name : "", resolve ? ")" : "", sport, type, orig_dst != NULL ? " for " : "", orig_dst != NULL ? (char *) orig_dst : "", hopcount, os == NULL ? "" : " (OS: ", os == NULL ? "" : os, os == NULL ? "" : ")" );
if (out != NULL)
fprintf(out, "%s%s%s%s\n", p2, resolve ? " (" : "", (resolve && he != NULL) ? he->h_name : "", resolve ? ")" : "");
free(p2);
if (orig_dst != NULL)
free(orig_dst);
if (alive_no < MAX_ALIVE && (alive[alive_no] = malloc(16)) != NULL) {
memcpy(alive[alive_no], ptr + 8, 16);
alive_no++;
if (alive_no == MAX_ALIVE)
fprintf(stderr, "Warning: more than %d alive systems detected, disabling double results check!\n", MAX_ALIVE);
}
}
} else if (verbose && len >= 96 + sizeof(buf) && nxt == NXT_ICMP6 && ptr[41 + offset] != 4 && ptr[40 + offset] < 4 && ptr[40 + offset] > 0
&& ptr[40 + 8 + offset + 6] == NXT_ICMP6) {
if (memcmp(ptr + len - 4, (char *) &si + _TAKE2, 2) == 0) {
if (resolve)
he = gethostbyaddr(ptr + 8, 16, AF_INET6);
p2 = thc_ipv62notation(ptr + 8);
p3 = thc_ipv62notation(ptr + 24 + 40 + 8 + offset);
switch (ptr[40 + offset]) {
case 1:
p1 = "unreachable";
break;
case 2:
p1 = "toobig";
break;
case 3:
p1 = "time-to-live-exceeded";
break;
}
printf("Warning: %s%s%s%s sent an ICMP %s for %s\n", p2, resolve ? " (" : "", resolve && he != NULL ? he->h_name : "", resolve ? ")" : "", p1, p3);
free(p2);
free(p3);
}
}
if (still_not_there == 0) {
if (ok != 1)
still_not_there = 1;
else
still_not_there = -1;
}
}
void get_ports_from_cmdline(int ports[], char *plist, char param) {
int p, c = 0;
char mylist[strlen(plist) + 1], *ptr, *ptr2;
if (strtok(plist, "0123456789,") != NULL) {
fprintf(stderr, "Error: ports must be defined by numbers and separated by a comma, e.g. \"-%c 22,53,80\"\n", param);
exit(-1);
}
strcpy(mylist, plist);
ptr = mylist;
do {
if (c >= MAX_PORTS) {
fprintf(stderr, "Error: a maximum number of %d ports can be specified\n", MAX_PORTS);
exit(-1);
}
if ((ptr2 = index(ptr, ',')) != NULL)
*ptr2++ = 0;
p = atoi(ptr);
if (p < 0 || p > 65535) { // allow port zero
fprintf(stderr, "Error: ports must be between 0 and 65535: %s\n", ptr);
exit(-1);
}
ports[c] = p % 65536;
c++;
ptr = ptr2;
} while (ptr2 != NULL);
}
int adress4to6(unsigned char *addr6, unsigned int addr4, char *state) {
unsigned char a, b, c, d;
a = (addr4 >> 24) % 256;
b = (addr4 >> 16) % 256;
c = (addr4 >> 8) % 256;
d = addr4 % 256;
memset(addr6 + 8, 0, 8);
switch(*state) {
case 0:
addr6[15] = d;
break;
case 1:
if (d > 9) { // is hex different to decimal?
addr6[14] = (d / 100);
d = d % 100;
if (d > 9)
d = (d / 10) * 16 + (d % 10);
addr6[15] = d;
break;
} else
*state += 1; // otherwise fall through
case 2:
addr6[9] = a;
addr6[11] = b;
addr6[13] = c;
addr6[15] = d;
break;
case 3:
if (d > 9 || c > 9 || b > 9 || a > 9) { // is hex different to decimal?
addr6[8] = (a / 100);
a = a % 100;
if (a > 9)
a = (a / 10) * 16 + (a % 10);
addr6[9] = a;
addr6[10] = (b / 100);
b = b % 100;
if (b > 9)
b = (b / 10) * 16 + (b % 10);
addr6[11] = b;
addr6[12] = (c / 100);
c = c % 100;
if (c > 9)
c = (c / 10) * 16 + (c % 10);
addr6[13] = c;
addr6[14] = (d / 100);
d = d % 100;
if (d > 9)
d = (d / 10) * 16 + (d % 10);
addr6[15] = d;
break;
} else
*state += 1; // otherwise fall through
case 4:
addr6[12] = a;
addr6[13] = b;
addr6[14] = c;
addr6[15] = d;
*state += 1;
return 1; // end of state reached
break; // not reached
default:
fprintf(stderr, "Error: invalid address4to6 state %d!\n", *state);
exit(-1);
}
*state += 1;
return 0;
}
int main(int argc, char *argv[]) {
unsigned char string[128]; // = "ip6 and dst ";
unsigned char *pkt = NULL, *router6 = NULL, *cur_dst, *p2, *p3, *ptr3, *smac, buf2[6];
unsigned char *multicast6 = NULL, *src6 = NULL, *mac = NULL, *rmac = NULL, *routers[2];
int pkt_len = 0, prefer = PREFER_GLOBAL, fromto = 0, dictptr = 0, offset = 14, step = 1;
int enumerate_mac = 0, enumerate_dhcp = 0, i, j, k, l, cur_enum = 0, print_only = 0, rand_source = 0;
int no_vendid = 0, no_nets = 0, local = -1, no_send = 1, no_send_local = 1, no_send_remote = 2, nos = 0, renew = 0, errcnt, sendrc;
char *interface = NULL, *input = NULL, *output = NULL, line[128], line2[128], *ptr, *ptr2, do_router = 0, ok;
unsigned int four_from[MAX_FOUR], four_to[MAX_FOUR], addr_cur;
unsigned char fcnt = 0, bh, bm, bl, restart, use_dmac = 0, dump_all = 0, inc_next = 0, inc_step = 1;
unsigned int ip1, ip2, ip3, ip4, cip1, cip2, cip3, cip4, cip5, cip6, cip7, cip8;
unsigned int fip1, fip2, fip3, fip4, fip5, fip6, fip7, fip8, tip1, tip2, tip3, tip4, tip5, tip6, tip7, tip8;
unsigned char vendid[MAX_VENDID][11], nets[MAX_NETS][8], orig_dst[16], dmac[27] = { 0, 0, 0, 0, 0, 0, 0 };
in_addr_t addr4;
// unsigned char dns4buf[] = { 0xde, 0xad, 0x01, 0x00, 0x00, 0x01, 0x00, 0x00,
// 0x00, 0x00, 0x00, 0x00, 0x09, 0x6c, 0x6f, 0x63, 0x61, 0x6c,
// 0x68, 0x6f, 0x73, 0x74, 0x00, 0x00, 0x01, 0x00, 0x01 };
unsigned char dns6buf[] = { 0xba, 0xbe, 0x01, 0x00, 0x00, 0x01, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x09, 0x6c, 0x6f, 0x63, 0x61, 0x6c,
0x68, 0x6f, 0x73, 0x74, 0x00, 0x00, 0x1c, 0x00, 0x01
};
thc_ipv6_hdr *hdr;
time_t passed;
pcap_t *p;
FILE *in = NULL;
time_t timeval;
for (i = 0; i < MAX_PORTS; i++)
udpports[i] = ackports[i] = synports[i] = -1;
if (argc == 1)
help(argv[0]);
j = 0;
while ((i = getopt(argc, argv, "CRhH4:W:w:PSLFdrlMDn:i:o:pvs:a:u:e:VZ:I:Xx:y:T:")) >= 0) {
switch (i) {
case 'h':
do_help++;
break; // not reached
case 'H':
do_hopcount = 1;
break;
case 'R':
rst_means_alive = 0;
break;
case 'P':
print_only = 1;
break;
case '4':
if (fcnt >= MAX_FOUR) {
fprintf(stderr, "Error: maximum number of IPv4 addresses supported is %d!\n", MAX_FOUR);
exit(-1);
}
if ((ptr = index(optarg, '/')) == NULL) {
if ((addr4 = inet_addr(optarg)) == 0xffffffff) {
fprintf(stderr, "Error: option is not a valid IPv4 address: %s\n", optarg);
exit(-1);
}
four_from[fcnt] = htonl(addr4);
four_to[fcnt] = htonl(addr4);
fcnt++;
} else {
if ((ptr2 = malloc(strlen(optarg) + 1)) == NULL) {
fprintf(stderr, "Error: can not allocate memory\n");
exit(-1);
}
strcpy(ptr2, optarg);
k = 32;
if ((ptr = index(ptr2, '/')) != NULL)
*ptr++ = 0;
if ((k = atoi(ptr)) < 8 || k > 31) {
fprintf(stderr, "Error: network size may only be between /8 and /31: %s\n", optarg);
exit(-1);
}
if ((addr4 = htonl(inet_addr(ptr2))) == 0xffffffff) {
fprintf(stderr, "Error: option is not a valid IPv4 address: %s\n", ptr2);
exit(-1);
}
free(ptr2);
l = 1 << (32 - k);
l--;
four_to[fcnt] = (addr4 | l);
l = 0xffffffff - l;
four_from[fcnt] = (addr4 & l);
fcnt++;
}
break;
case 'T':
tagging = optarg;
break;
case 'Z':
use_dmac = 1;
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]);
break;
case 'w':
case 'W':
waittime = atoi(optarg) * 1000;
break;
case 'S':
slow = 1;
break;
case 'L':
ndp_only = 1;
break;
case 'V':
debug = 1;
break;
case 'F':
do_ping = 1;
do_dst = 1;
udpports[0] = 53;
ackports[0] = 9511;
synports[0] = 22;
synports[1] = 25;
synports[2] = 80;
synports[3] = 443;
synports[4] = 9511;
break;
case 'd':
resolve = 1;
break;
case 'r':
renew = 1;
break;
case 'l':
prefer = PREFER_LINK;
break;
case 'm':
thc_ipv6_rawmode(1);
break;
case 'M':
enumerate_mac = 1;
break;
case 'C':
case 'D':
enumerate_dhcp = 1;
if (dict == NULL)
dict = dict_small;
else
dict = dict_large;
break;
case 'n':
no_send_local = no_send_remote = atoi(optarg);
break;
case 'I':
if ((src6 = thc_resolve6(optarg)) == NULL) {
fprintf(stderr, "Error: unable to resolve IPv6 source address %s\n", optarg);
exit(-1);
}
if (index(optarg, '/') != NULL) {
if ((p2 = strdup(optarg)) == NULL) {
fprintf(stderr, "Error: malloc()\n");
exit(-1);
}
p3 = index(p2, '/');
*p3++ = 0;
if ((i = atoi(p3)) < 8 || i > 120 || i % 8 != 0) {
fprintf(stderr, "Error: -I netmask parameter must be a multiple of 8\n");
exit(-1);
}
rand_source = 16 - (i / 8);
}
break;
case 'i':
input = optarg;
list++;
if (curr == 0)
curr = 1;
break;
case 'o':
output = optarg;
break;
case 'p':
do_ping = 1;
j = (j | 1);
break;
case 'v':
verbose++;
break;
case 's':
j = (j | 8);
if (strcasecmp(optarg, "xxx") == 0 || strncasecmp(optarg, "port", 4) == 0 || strncasecmp(optarg, "scan", 4) == 0) {
portscan = 1;
if (verbose < 2)
verbose = 2;
} else
get_ports_from_cmdline(synports, optarg, 's');
break;
case 'a':
j = (j | 8);
get_ports_from_cmdline(ackports, optarg, 'a');
break;
case 'u':
j = (j | 8);
get_ports_from_cmdline(udpports, optarg, 'u');
break;
case 'e':
if (index(optarg, ',') != 0) {
do_dst = 1;
do_hop = 1;
j = (j | 6);
} else {
if (strncasecmp(optarg, "dst", 3) == 0 || strncasecmp(optarg, "dest", 4) == 0) {
do_dst = 1;
j = (j | 4);
}
if (strncasecmp(optarg, "hop", 3) == 0) {
do_hop = 1;
j = (j | 2);
}
if (do_hop + do_dst == 0) {
fprintf(stderr, "Error: unknown options to error packet option: %s\n", optarg);
exit(-1);
}
}
break;
case 'X':
dump_all = 1;
break;
case 'x':
srcport = atoi(optarg);
if (srcport < 0 || srcport > 65535) {
fprintf(stderr, "Error: invalid port: %s\n", optarg);
exit(-1);
}
break;
case 'y':
step = atoi(optarg);
if (step < 1 || step > 256) {
fprintf(stderr, "Error: invalid step range (valid: 1-256): %s\n", optarg);
exit(-1);
}
break;
default:
fprintf(stderr, "Error: unknown option -%c\n", i);
exit(-1);
}
}
if (do_help)
help(argv[0]);
if (slow && ndp_only) {
fprintf(stderr, "Error: you can not use the -S and -L options together!\n");
exit(-1);
}
if (j) { // reset defaults if an alive check type was chosen
if ((j & 1) == 0)
do_ping = 0;
if ((j & 2) == 0)
do_hop = 0;
if ((j & 4) == 0)
do_dst = 0;
}
if (verbose > 1)
fprintf(stderr, "Warning: -vv disables duplicate checks, every packet will be logged.\n");
if (no_send < 1 || no_send > 10) {
fprintf(stderr, "Error: -n option may only be set between 1 and 10\n");
exit(-1);
}
if (waittime < 0) {
fprintf(stderr, "Error: -W wait time is not a positive value\n");
exit(-1);
}
if (do_hdr_size)
offset = do_hdr_size;
interface = argv[optind];
if (argv[optind + 1] != NULL && argc >= optind + 2) {
ptr = argv[optind + 1];
curr = 0;
} else
ptr = "ff02::1";
if (ptr != NULL) { // && (index(ptr, ':') == NULL || index(ptr, '-') == NULL)) {
if (verbose > 1)
printf("Resolving %s ...\n", ptr);
if (index(ptr, '/') != NULL)
fprintf(stderr, "Warning: network mask is ignored and processed as single host: %s\n", ptr);
multicast6 = thc_resolve6(ptr); // if it cant resolve - no problem
}
if (interface == NULL) {
fprintf(stderr, "Error: no interface defined!\n");
exit(-1);
}
if (multicast6 != NULL && multicast6[0] == 0xfe && multicast6[1] == 0x80)
prefer = PREFER_LINK;
if (src6 == NULL) {
i = _thc_ipv6_showerrors;
if (multicast6 != NULL && multicast6[0] == 0xff && multicast6[1] == 0x02)
_thc_ipv6_showerrors = 0;
if ((src6 = thc_get_own_ipv6(interface, multicast6, prefer)) == NULL) {
fprintf(stderr, "Error: no IPv6 address found for interface %s!\n", interface);
exit(-1);
}
_thc_ipv6_showerrors = i;
}
if ((smac = thc_get_own_mac(interface)) == NULL) {
fprintf(stderr, "Error: no mac address found for interface %s!\n", interface);
exit(-1);
}
if (verbose)
printf("Selected source address %s to scan %s\n", thc_ipv62notation(src6), ptr);
if (argv[optind + 2] != NULL && argc >= optind + 3) {
if (verbose > 1)
printf("Resolving %s ...\n", argv[optind + 2]);
router6 = thc_resolve6(argv[optind + 2]);
do_router = 1;
if (use_dmac)
mac = dmac;
else if ((mac = thc_get_mac(interface, src6, router6)) == NULL) {
fprintf(stderr, "Error: could not resolve mac address for destination router %s\n", argv[optind + 2]);
exit(-1);
}
}
//strcat(string, thc_ipv62notation(src6));
//thc_dump_data(src6, 16, "SRC6");