winpcap/Examples/sendcap/sendcap.c

   1 /*
   2  * Copyright (c) 1999 - 2005 NetGroup, Politecnico di Torino (Italy)
   3  * Copyright (c) 2005 - 2006 CACE Technologies, Davis (California)
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  * notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  * notice, this list of conditions and the following disclaimer in the
  14  * documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the Politecnico di Torino, CACE Technologies
  16  * nor the names of its contributors may be used to endorse or promote
  17  * products derived from this software without specific prior written
  18  * permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  23  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  24  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  30  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  *
  32  */
  33
  34 #include <stdlib.h>
  35 #include <stdio.h>
  36
  37 #include <pcap.h>
  38 #include <remote-ext.h>
  39
  40 void usage();
  41
  42 void main(int argc, char **argv)
  43 {
  44         pcap_t *indesc,*outdesc;
  45         char errbuf[PCAP_ERRBUF_SIZE];
  46         char source[PCAP_BUF_SIZE];
  47         FILE *capfile;
  48         int caplen, sync;
  49         u_int res;
  50         pcap_send_queue *squeue;
  51         struct pcap_pkthdr *pktheader;
  52         u_char *pktdata;
  53         float cpu_time;
  54         u_int npacks = 0;
  55
  56         /* Check the validity of the command line */
  57         if (argc <= 2 || argc >= 5)
  58         {
  59                 usage();
  60                 return;
  61         }
  62
  63         /* Retrieve the length of the capture file */
  64         capfile=fopen(argv[1],"rb");
  65         if(!capfile){
  66                 printf("Capture file not found!\n");
  67                 return;
  68         }
  69
  70         fseek(capfile , 0, SEEK_END);
  71         caplen= ftell(capfile)- sizeof(struct pcap_file_header);
  72         fclose(capfile);
  73
  74         /* Chek if the timestamps must be respected */
  75         if(argc == 4 && argv[3][0] == 's')
  76                 sync = TRUE;
  77         else
  78                 sync = FALSE;
  79
  80         /* Open the capture */
  81         /* Create the source string according to the new WinPcap syntax */
  82         if ( pcap_createsrcstr( source,                 // variable that will keep the source string
  83                                                         PCAP_SRC_FILE,  // we want to open a file
  84                                                         NULL,                   // remote host
  85                                                         NULL,                   // port on the remote host
  86                                                         argv[1],                // name of the file we want to open
  87                                                         errbuf                  // error buffer
  88                                                         ) != 0)
  89         {
  90                 fprintf(stderr,"\nError creating a source string\n");
  91                 return;
  92         }
  93
  94         /* Open the capture file */
  95         if ( (indesc= pcap_open(source, 65536, PCAP_OPENFLAG_PROMISCUOUS, 1000, NULL, errbuf) ) == NULL)
  96         {
  97                 fprintf(stderr,"\nUnable to open the file %s.\n", source);
  98                 return;
  99         }
 100
 101         /* Open the output adapter */
 102         if ( (outdesc= pcap_open(argv[2], 100, PCAP_OPENFLAG_PROMISCUOUS, 1000, NULL, errbuf) ) == NULL)
 103         {
 104                 fprintf(stderr,"\nUnable to open adapter %s.\n", source);
 105                 return;
 106         }
 107
 108         /* Check the MAC type */
 109         if (pcap_datalink(indesc) != pcap_datalink(outdesc))
 110         {
 111                 printf("Warning: the datalink of the capture differs from the one of the selected interface.\n");
 112                 printf("Press a key to continue, or CTRL+C to stop.\n");
 113                 getchar();
 114         }
 115
 116         /* Allocate a send queue */
 117         squeue = pcap_sendqueue_alloc(caplen);
 118
 119         /* Fill the queue with the packets from the file */
 120         while ((res = pcap_next_ex( indesc, &pktheader, &pktdata)) == 1)
 121         {
 122                 if (pcap_sendqueue_queue(squeue, pktheader, pktdata) == -1)
 123                 {
 124                         printf("Warning: packet buffer too small, not all the packets will be sent.\n");
 125                         break;
 126                 }
 127
 128                 npacks++;
 129         }
 130
 131         if (res == -1)
 132         {
 133                 printf("Corrupted input file.\n");
 134                 pcap_sendqueue_destroy(squeue);
 135                 return;
 136         }
 137
 138         /* Transmit the queue */
 139
 140         cpu_time = (float)clock ();
 141
 142         if ((res = pcap_sendqueue_transmit(outdesc, squeue, sync)) < squeue->len)
 143         {
 144                 printf("An error occurred sending the packets: %s. Only %d bytes were sent\n", pcap_geterr(outdesc), res);
 145         }
 146
 147         cpu_time = (clock() - cpu_time)/CLK_TCK;
 148
 149         printf ("\n\nElapsed time: %5.3f\n", cpu_time);
 150         printf ("\nTotal packets generated = %d", npacks);
 151         printf ("\nAverage packets per second = %d", (int)((double)npacks/cpu_time));
 152         printf ("\n");
 153
 154         /* free the send queue */
 155         pcap_sendqueue_destroy(squeue);
 156
 157         /* Close the input file */
 158         pcap_close(indesc);
 159
 160         /*
 161          * lose the output adapter
 162          * IMPORTANT: remember to close the adapter, otherwise there will be no guarantee that all the
 163          * packets will be sent!
 164          */
 165         pcap_close(outdesc);
 166
 167
 168         return;
 169 }
 170
 171
 172 void usage()
 173 {
 174
 175         printf("\nSendcap, sends a libpcap/tcpdump capture file to the net. Copyright (C) 2002 Loris Degioanni.\n");
 176         printf("\nUsage:\n");
 177         printf("\t sendcap file_name adapter [s]\n");
 178         printf("\nParameters:\n");
 179         printf("\nfile_name: the name of the dump file that will be sent to the network\n");
 180         printf("\nadapter: the device to use. Use \"WinDump -D\" for a list of valid devices\n");
 181         printf("\ns: if present, forces the packets to be sent synchronously, i.e. respecting the timestamps in the dump file. This option will work only under Windows NTx.\n\n");
 182
 183         exit(0);
 184 }