data_tracker.h

/*
 * 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.
 *
 */

#ifndef TINS_TCP_IP_DATA_TRACKER_H
#define TINS_TCP_IP_DATA_TRACKER_H

#include <vector>
#include <map>
#include <stdint.h>
#include <tins/config.h>
#include <tins/macros.h>

#ifdef TINS_HAVE_TCPIP

namespace Tins {
namespace TCPIP {

class TINS_API DataTracker {
public:
    typedef std::vector<uint8_t> payload_type;

    typedef std::map<uint32_t, payload_type> buffered_payload_type;

    DataTracker();

    DataTracker(uint32_t seq_number);

    bool process_payload(uint32_t seq, payload_type payload);

    void advance_sequence(uint32_t seq);

    uint32_t sequence_number() const;

    void sequence_number(uint32_t seq);

    const payload_type& payload() const;

    payload_type& payload();

    const buffered_payload_type& buffered_payload() const;

    buffered_payload_type& buffered_payload();

    uint32_t total_buffered_bytes() const;
private:
    void store_payload(uint32_t seq, payload_type payload);
    buffered_payload_type::iterator erase_iterator(buffered_payload_type::iterator iter);

    payload_type payload_;
    buffered_payload_type buffered_payload_;
    uint32_t seq_number_;
    uint32_t total_buffered_bytes_;
};

} // TCPIP
} // Tins

#endif // TINS_HAVE_TCPIP

#endif // TINS_TCP_IP_DATA_TRACKER_H