winpcap/Examples/smp_1/smp_1.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
  35 #include <stdlib.h>
  36 #include <stdio.h>
  37
  38 #include <pcap.h>
  39
  40
  41 main(int argc, char **argv)
  42 {
  43 pcap_if_t *alldevs, *d;
  44 pcap_t *fp;
  45 u_int inum, i=0;
  46 char errbuf[PCAP_ERRBUF_SIZE];
  47 int res;
  48 struct pcap_pkthdr *header;
  49 const u_char *pkt_data;
  50 struct pcap_pkthdr old;
  51
  52 char a[11];
  53
  54         printf("SMP_1\n");
  55         printf("\nThis program tests the WinPcap kernel driver on SMP machines.\n");
  56         printf("The program tests that timestamps on the captured packets are consistent,\n");
  57         printf("and that the caplen is equal to the packet length.\n");
  58         printf("If there is an error, it will print out a message saying \"Inconsistent XXX\"\n");
  59
  60         if (pcap_findalldevs_ex(PCAP_SRC_IF_STRING, NULL, &alldevs, errbuf) == -1)
  61         {
  62                 fprintf(stderr,"Error in pcap_findalldevs: %s\n", errbuf);
  63                 exit(1);
  64         }
  65
  66         /* Print the list */
  67         for(d=alldevs; d; d=d->next)
  68         {
  69                 printf("%d. %s", ++i, d->name);
  70                 if (d->description)
  71                         printf(" (%s)\n", d->description);
  72                 else
  73                         printf(" (No description available)\n");
  74         }
  75
  76         if(i==0)
  77         {
  78                 printf("\nNo interfaces found! Make sure WinPcap is installed.\n");
  79                 return -1;
  80         }
  81
  82         printf("Enter the interface number (1-%d):",i);
  83         scanf("%d", &inum);
  84
  85         if(inum < 1 || inum > i)
  86         {
  87                 printf("\nInterface number out of range.\n");
  88                 /* Free the device list */
  89                 pcap_freealldevs(alldevs);
  90                 return -1;
  91         }
  92
  93         /* Jump to the selected adapter */
  94         for(d=alldevs, i=0; i< inum-1 ;d=d->next, i++);
  95
  96         /* Open the device */
  97         if ( (fp= pcap_open(d->name, 65536, PCAP_OPENFLAG_PROMISCUOUS, 1000, NULL, errbuf) ) == NULL)
  98         {
  99                 fprintf(stderr,"\nUnable to open the adapter. %s is not supported by WinPcap\n", d->name);
 100                 /* Free the device list */
 101                 pcap_freealldevs(alldevs);
 102                 return -1;
 103         }
 104
 105         old.ts.tv_sec=0;
 106         old.ts.tv_usec=0;
 107
 108
 109         /* Read the packets */
 110         while((res = pcap_next_ex( fp, &header, &pkt_data)) >= 0){
 111
 112                 if(res == 0)
 113                         continue;
 114
 115                 //check that caplen is equal to packet length
 116                 if (header->caplen!=header->len)
 117                         printf("Inconsistent header: CapLen %d\t Len %d\n",header->caplen,header->len);
 118
 119                 //check that timestamps always grow
 120                 if ( old.ts.tv_sec > header->ts.tv_sec || (old.ts.tv_sec == header->ts.tv_sec  && old.ts.tv_usec > header->ts.tv_usec))
 121                         printf("Inconsistent Timestamps! Old was %d.%.06d - New is %d.%.06d\n",old.ts.tv_sec,old.ts.tv_usec, header->ts.tv_sec,header->ts.tv_usec);
 122
 123                 old=*header;
 124
 125         }
 126
 127         if(res == -1){
 128                 printf("Error reading the packets: %s\n", pcap_geterr(fp));
 129                 return -1;
 130         }
 131
 132         scanf("%s",a);
 133
 134         return 0;
 135 }