/*
 * Copyright (c) 2008 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 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.
 *
 * This sample was contributed by 
 * Marcin Okraszewski (Marcin.OkraszewskiATpl.compuware.com)
 *
 */

#include <tchar.h>
#include <pcap.h>
#include <stdio.h>

/** Prints packet timestaps regardless of format*/
int _tmain(int argc, _TCHAR* argv[])
{
    char errbuf[PCAP_ERRBUF_SIZE];
    wchar_t cmd[1024];
    wchar_t tshark_path[MAX_PATH];
    wchar_t file_path[MAX_PATH];

    if ( argc != 3 ) {
        wprintf(L"Prints packet timestaps regardless of format.\n");
        wprintf(L"Usage:\n\t%ls <tshark path> <trace file>\n", argv[0]);
        return 1;
    }

    // conversion to short path name in case there are spaces
    if ( ! GetShortPathNameW(argv[1], tshark_path, MAX_PATH) || 
         ! GetShortPathNameW(argv[2], file_path, MAX_PATH) )
    {
        printf("Failed to convert paths to short form.");
        return 1;
    }

    // create tshark command, which will make the trace conversion and print in libpcap format to stdout
    if ( swprintf_s(cmd, 1024, L"%ls -r %ls -w - -F libpcap", tshark_path, file_path) < 0 ) {
        wprintf(L"Failed to create command\n");
        return 1;
    }

    // start tshark
    FILE *tshark_out = _wpopen(cmd, L"rb");
    if ( tshark_out == NULL ) {
        strerror_s(errbuf, PCAP_ERRBUF_SIZE, errno);
        printf("Failed run tshark: %s\n", errbuf);
        wprintf(L"Command: %ls", cmd);
        return 1;
    }

    // open stdout from tshark
    pcap_t *pcap = pcap_fopen_offline(tshark_out, errbuf);
    if ( pcap == NULL ) {
        printf("Error opening stream from tshark: %s\n", errbuf);
        return 1;
    }

    // print information about every packet int trace
    struct pcap_pkthdr hdr;
    while ( pcap_next(pcap, &hdr) ) {
        printf("packet: ts: %u.%06u,  len: %4u,  caplen: %4u\n", hdr.ts.tv_sec, hdr.ts.tv_usec, hdr.len, hdr.caplen);
    }

    // clean up
    pcap_close(pcap);
    _pclose(tshark_out);
    return 0;
}