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libnet

    1: /*
    2:  *  $Id: icmp_echo_cq.c,v 1.1.1.1 2012/02/21 22:14:23 misho Exp $
    3:  *
    4:  *  libnet 1.1
    5:  *  Build ICMP_ECHO packets using the context queue interface.
    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: #ifdef __WIN32__
   38: #include "../include/win32/getopt.h"
   39: #endif
   40: 
   41: void usage(char *);
   42: 
   43: 
   44: int
   45: main(int argc, char **argv)
   46: {
   47:     libnet_t *l = NULL;
   48:     u_long src_ip = 0, dst_ip = 0;
   49:     u_long count = 10;
   50:     int i, c;
   51:     libnet_ptag_t t;
   52:     char *payload = NULL;
   53:     u_short payload_s = 0;
   54:   
   55:     char *device = NULL;
   56:     char *pDst = NULL, *pSrc = NULL;
   57:     char errbuf[LIBNET_ERRBUF_SIZE];
   58:     char label[LIBNET_LABEL_SIZE];
   59: 
   60:     printf("libnet 1.1 packet shaping: ICMP[RAW using context queue]\n");
   61: 
   62:     while((c = getopt(argc, argv, "d:s:i:c:p:")) != EOF)
   63:     {
   64:         switch (c)
   65:         {
   66:         case 'd':
   67:             pDst = optarg;
   68:             break;
   69:         case 's':
   70:             pSrc = optarg;
   71:             break;
   72:         case 'i':
   73:             device = optarg;
   74:             break;
   75:         case 'c':
   76:             count = strtoul(optarg, 0, 10);
   77:             break;
   78:         case 'p':
   79:             payload = optarg;
   80:             payload_s = strlen(payload);
   81:             break;
   82:         }
   83:     }
   84: 
   85:     if (!pSrc || !pDst)
   86:     {
   87:         usage(argv[0]);
   88:         exit(EXIT_FAILURE);
   89:     }
   90: 
   91:     /*
   92:      *  Fill the context queue with "count" packets, each with their own
   93:      *  context.
   94:      */
   95:     for (i = 0; i < count; i++)
   96:     {
   97:         l = libnet_init(
   98:                 LIBNET_RAW4,                  /* injection type */
   99:                 device,                       /* network interface */
  100:                 errbuf);                      /* errbuf */
  101: 
  102:         if (l == NULL)
  103:         {
  104:             /* we should run through the queue and free any stragglers */
  105:             fprintf(stderr, "libnet_init() failed: %s", errbuf);
  106:             exit(EXIT_FAILURE);
  107:         }
  108:         /*
  109:          *  Since we need a libnet context for address resolution it is
  110:          *  necessary to put this inside the loop.
  111:          */
  112:         if (!dst_ip && (dst_ip = libnet_name2addr4(l, pDst,
  113:                 LIBNET_RESOLVE)) == -1)
  114:         {
  115:             fprintf(stderr, "Bad destination IP address: %s\n", pDst);
  116:             exit(1);
  117:         }
  118:         if (!src_ip && (src_ip = libnet_name2addr4(l, pSrc,
  119:                 LIBNET_RESOLVE)) == -1)
  120:         {
  121:             fprintf(stderr, "Bad source IP address: %s\n", pSrc);
  122:             exit(1);
  123:         }
  124: 
  125:         t = libnet_build_icmpv4_echo(
  126:             ICMP_ECHO,                            /* type */
  127:             0,                                    /* code */
  128:             0,                                    /* checksum */
  129:             0x42,                                 /* id */
  130:             0x42,                                 /* sequence number */
  131:             NULL,                                 /* payload */
  132:             0,                                    /* payload size */
  133:             l,                                    /* libnet handle */
  134:             0);
  135:         if (t == -1)
  136:         {
  137:             fprintf(stderr, "Can't build ICMP header: %s\n",
  138:                     libnet_geterror(l));
  139:             goto bad;
  140:         }
  141: 
  142:         t = libnet_build_ipv4(
  143:             LIBNET_IPV4_H + LIBNET_ICMPV4_ECHO_H + payload_s, /* length */
  144:             0,                                    /* TOS */
  145:             0x42,                                 /* IP ID */
  146:             0,                                    /* IP Frag */
  147:             64,                                   /* TTL */
  148:             IPPROTO_ICMP,                         /* protocol */
  149:             0,                                    /* checksum */
  150:             src_ip,                               /* source IP */
  151:             dst_ip,                               /* destination IP */
  152:             payload,                              /* payload */
  153:             payload_s,                            /* payload size */
  154:             l,                                    /* libnet handle */
  155:             0);
  156:         if (t == -1)
  157:         {
  158:             fprintf(stderr, "Can't build IP header: %s\n", libnet_geterror(l));
  159:             goto bad;
  160:         }
  161: 
  162:         /* and finally, put it in the context queue */
  163:         snprintf(label, sizeof(label)-1, "echo %d", i);
  164:         if (libnet_cq_add(l, label) == -1)
  165:         {
  166:             fprintf(stderr, "add error: %s\n", libnet_geterror(l));
  167:             goto bad;
  168:         }
  169:     }
  170: 
  171:     for_each_context_in_cq(l)
  172:     {
  173:         c = libnet_write(l);
  174:         if (c == -1)
  175:         {
  176:             fprintf(stderr, "Write error: %s\n", libnet_geterror(l));
  177:             goto bad;
  178:         }
  179:         else
  180:         {
  181:             fprintf(stderr, "Wrote %d byte ICMP packet from context \"%s\"; "
  182:                     "check the wire.\n", c, libnet_cq_getlabel(l));
  183:         }
  184:   }
  185: 
  186:     libnet_cq_destroy();
  187:     return (EXIT_SUCCESS);
  188: bad:
  189:     libnet_cq_destroy();
  190:     libnet_destroy(l);
  191:     return (EXIT_FAILURE);
  192: }
  193: 
  194: void
  195: usage(char *name)
  196: {
  197:     fprintf(stderr, "usage: %s -s source_ip -d destination_ip"
  198:                     " [-i iface] [-c count = 10]\n ", name);
  199: }
  200: 
  201: /* EOF */