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
|
/*
* macof.c
*
* C port of macof-1.1 from the Perl Net::RawIP distribution.
* Tests network devices by flooding local network with MAC-addresses.
*
* Perl macof originally written by Ian Vitek <ian.vitek@infosec.se>.
*
* Copyright (c) 1999 Dug Song <dugsong@monkey.org>
*
* $Id: macof.c,v 1.15 2001/03/15 08:33:04 dugsong Exp $
*/
#include "config.h"
#include <sys/types.h>
#include <sys/param.h>
#include <netinet/in.h>
#include <stdio.h>
#include <string.h>
#include <err.h>
#include <libnet.h>
#include <pcap.h>
#include "version.h"
extern char *ether_ntoa(struct ether_addr *);
extern struct ether_addr *ether_aton(char *);
in_addr_t Src = 0;
in_addr_t Dst = 0;
u_char *Tha = NULL;
u_short Dport = 0;
u_short Sport = 0;
char *Intf = NULL;
int Repeat = -1;
static void
usage(void)
{
fprintf(stderr, "Version: " VERSION "\n"
"Usage: macof [-s src] [-d dst] [-e tha] [-x sport] [-y dport]"
"\n [-i interface] [-n times]\n");
exit(1);
}
static void
gen_mac(u_char *mac)
{
*((in_addr_t *)mac) = libnet_get_prand(PRu32);
*((u_short *)(mac + 4)) = libnet_get_prand(PRu16);
}
int
main(int argc, char *argv[])
{
extern char *optarg;
extern int optind;
int c, i;
struct libnet_link_int *llif;
char ebuf[PCAP_ERRBUF_SIZE];
u_char sha[ETHER_ADDR_LEN], tha[ETHER_ADDR_LEN];
in_addr_t src, dst;
u_short sport, dport;
u_int32_t seq;
u_char pkt[ETH_H + IP_H + TCP_H];
while ((c = getopt(argc, argv, "vs:d:e:x:y:i:n:h?V")) != -1) {
switch (c) {
case 'v':
break;
case 's':
Src = libnet_name_resolve(optarg, 0);
break;
case 'd':
Dst = libnet_name_resolve(optarg, 0);
break;
case 'e':
Tha = (u_char *)ether_aton(optarg);
break;
case 'x':
Sport = atoi(optarg);
break;
case 'y':
Dport = atoi(optarg);
break;
case 'i':
Intf = optarg;
break;
case 'n':
Repeat = atoi(optarg);
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc != 0)
usage();
if (!Intf && (Intf = pcap_lookupdev(ebuf)) == NULL)
errx(1, "%s", ebuf);
if ((llif = libnet_open_link_interface(Intf, ebuf)) == 0)
errx(1, "%s", ebuf);
libnet_seed_prand();
for (i = 0; i != Repeat; i++) {
gen_mac(sha);
if (Tha == NULL) gen_mac(tha);
else memcpy(tha, Tha, sizeof(tha));
if (Src != 0) src = Src;
else src = libnet_get_prand(PRu32);
if (Dst != 0) dst = Dst;
else dst = libnet_get_prand(PRu32);
if (Sport != 0) sport = Sport;
else sport = libnet_get_prand(PRu16);
if (Dport != 0) dport = Dport;
else dport = libnet_get_prand(PRu16);
seq = libnet_get_prand(PRu32);
libnet_build_ethernet(tha, sha, ETHERTYPE_IP, NULL, 0, pkt);
libnet_build_ip(TCP_H, 0, libnet_get_prand(PRu16), 0, 64,
IPPROTO_TCP, src, dst, NULL, 0, pkt + ETH_H);
libnet_build_tcp(sport, dport, seq, 0, TH_SYN, 512,
0, NULL, 0, pkt + ETH_H + IP_H);
libnet_do_checksum(pkt + ETH_H, IPPROTO_IP, IP_H);
libnet_do_checksum(pkt + ETH_H, IPPROTO_TCP, TCP_H);
if (libnet_write_link_layer(llif, Intf, pkt, sizeof(pkt)) < 0)
errx(1, "write");
fprintf(stderr, "%s ",
ether_ntoa((struct ether_addr *)sha));
fprintf(stderr, "%s %s.%d > %s.%d: S %u:%u(0) win 512\n",
ether_ntoa((struct ether_addr *)tha),
libnet_host_lookup(Src, 0), sport,
libnet_host_lookup(Dst, 0), dport, seq, seq);
}
exit(0);
}
|