TanSanC

/* Copyright (c) 1999 - 2005 NetGroup, Politecnico di Torino (Italy)

 * Copyright (c) 2005 - 2006 CACE Technologies, Davis (California)

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * 1. Redistributions of source code must retain the above copyright

 * notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 * notice, this list of conditions and the following disclaimer in the

 * documentation and/or other materials provided with the distribution.

 * 3. Neither the name of the Politecnico di Torino, CACE Technologies 

 * nor the names of its contributors may be used to endorse or promote 

 * products derived from this software without specific prior written 

 * permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 *

 */

#include <stdlib.h>

#include <stdio.h>

//

// NOTE: remember to include WPCAP and HAVE_REMOTE among your

// preprocessor definitions.

//

#include <pcap.h>

#define LINE_LEN 16

int main(int argc, char **argv)

{   

pcap_if_t *alldevs, *d;

pcap_t *fp;

u_int inum, i=0;

char errbuf[PCAP_ERRBUF_SIZE];

int res;

struct pcap_pkthdr *header;

const u_char *pkt_data;

    printf("pktdump_ex: prints the packets of the network using WinPcap.\n");

    printf("   Usage: pktdump_ex [-s source]\n\n"

           "   Examples:\n"

           "      pktdump_ex -s file://c:/temp/file.acp\n"

           "      pktdump_ex -s rpcap://\\Device\\NPF_{C8736017-F3C3-4373-94AC-9A34B7DAD998}\n\n");

    if(argc < 3)

    {

        printf("\nNo adapter selected: printing the device list:\n");

        /* The user didn't provide a packet source: Retrieve the local device list */

        if (pcap_findalldevs_ex(PCAP_SRC_IF_STRING, NULL, &alldevs, errbuf) == -1)

        {

            fprintf(stderr,"Error in pcap_findalldevs_ex: %s\n", errbuf);

            return -1;

        }

        /* Print the list */

        for(d=alldevs; d; d=d->next)

        {

            printf("%d. %s\n    ", ++i, d->name);

            if (d->description)

                printf(" (%s)\n", d->description);

            else

                printf(" (No description available)\n");

        }

        if (i==0)

        {

            fprintf(stderr,"No interfaces found! Exiting.\n");

            return -1;

        }

        printf("Enter the interface number (1-%d):",i);

        scanf_s("%d", &inum);

        if (inum < 1 || inum > i)

        {

            printf("\nInterface number out of range.\n");

            /* Free the device list */

            pcap_freealldevs(alldevs);

            return -1;

        }

        /* Jump to the selected adapter */

        for (d=alldevs, i=0; i< inum-1 ;d=d->next, i++);

        /* Open the device */

        if ( (fp= pcap_open(d->name,

                            100 /*snaplen*/,

                            PCAP_OPENFLAG_PROMISCUOUS /*flags*/,

                            20 /*read timeout*/,

                            NULL /* remote authentication */,

                            errbuf)

                            ) == NULL)

        {

            fprintf(stderr,"\nError opening adapter\n");

            return -1;

        }

    }

    else 

    {

        // Do not check for the switch type ('-s')

        if ( (fp= pcap_open(argv[2],

                            100 /*snaplen*/,

                            PCAP_OPENFLAG_PROMISCUOUS /*flags*/,

                            20 /*read timeout*/,

                            NULL /* remote authentication */,

                            errbuf)

                            ) == NULL)

        {

            fprintf(stderr,"\nError opening source: %s\n", errbuf);

            return -1;

        }

    }

    /* Read the packets */

    while((res = pcap_next_ex( fp, &header, &pkt_data)) >= 0)

    {

        if(res == 0)

            /* Timeout elapsed */

            continue;

        /* print pkt timestamp and pkt len */

        printf("%ld:%ld (%ld)\n", header->ts.tv_sec, header->ts.tv_usec, header->len);          

        /* Print the packet */

        for (i=1; (i < header->caplen + 1 ) ; i++)

        {

            printf("%.2x ", pkt_data[i-1]);

            if ( (i % LINE_LEN) == 0) printf("\n");

        }

        printf("\n\n");     

    }

    if(res == -1)

    {

        fprintf(stderr, "Error reading the packets: %s\n", pcap_geterr(fp));

        return -1;

    }

    return 0;

}