pktap.cpp

/*
 * Copyright (c) 2017, Matias Fontanini
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * 
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * * 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.
 * 
 * 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 <cstring>
#include <tins/exceptions.h>
#include <tins/pktap.h>
#include <tins/exceptions.h>
#include <tins/memory_helpers.h>
#include <tins/detail/pdu_helpers.h>

using Tins::Memory::InputMemoryStream;

namespace Tins {

PKTAP::PKTAP() : header_() {
}

PKTAP::PKTAP(const uint8_t* buffer, uint32_t total_sz) {
    InputMemoryStream stream(buffer, total_sz);
    stream.read(header_);
    uint32_t header_length = header_.length;
    if (header_length > total_sz || header_length < sizeof(header_)) {
        throw malformed_packet();
    }
    stream.skip(header_length - sizeof(header_));
    if (header_.next && stream) {
        inner_pdu(
            Internals::pdu_from_dlt_flag(
                header_.dlt, 
                stream.pointer(), 
                stream.size()
            )
        );
    }
}

uint32_t PKTAP::header_size() const {
    return sizeof(header_);
}

void PKTAP::write_serialization(uint8_t* /*buffer*/, uint32_t /*total_sz*/) {
    throw pdu_not_serializable();
}

} // Tins