kea/tests/tools/badpacket/badpacket.cc

// Copyright (C) 2011  Internet Systems Consortium, Inc. ("ISC")
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
// PERFORMANCE OF THIS SOFTWARE.

#include <unistd.h>
#include <iostream>

#include <config.h>

#include <exceptions/exceptions.h>
#include "command_options.h"
#include "scan.h"

/// \brief Perform Bad Packet Scan
///
/// Scans the server by sending a sequence of (potentially) bad packets and
/// printing the packet settings and the response received.  The principle
/// raison d'etre for this is to check if a bad packet will cause a crash.
///
/// This particular version of the code allows a set of ranges to be set for
/// each field in the "flags" word (the third and fourth bytes) of a DNS
/// message. (Most of the flags are single-bit values, so the range is just 0-1.
/// The OPCODE and RCODE are both four bits wide, so the range is 0-15.)  The
/// program then sends packets containing each combination of values.
///
/// TODO: Extend the program to other bad values.
/// Examples of this would be to make the count fields invalid, to add data
/// to sections that should be empty, and to deliberately mangle the names in
/// these sections.

using namespace isc::badpacket;

/// \brief Main Program
int main(int argc, char* argv[]) {

    try {
        CommandOptions options;
        options.parse(argc, argv);

        // Construct the scan object and perform the scan.
        Scan scanner;
        scanner.scan(options);
    } catch (isc::Exception& e) {
        std::cout << "ERROR: " << e.what() << "\n";
        return 1;
    }

    return 0;
}