/*
 * Packet.h
 *
 * Copyright (C) 2008 Matthias Schiffer <matthias@gamezock.de>
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef MAD_NET_PACKET_H_
#define MAD_NET_PACKET_H_

#include "export.h"

#include <cstdlib>
#include <cstring>
#include <boost/cstdint.hpp>

#ifdef _WIN32
# include <winsock2.h>
#else
# include <netinet/in.h>
#endif

namespace Mad {
namespace Net {

class MAD_NET_EXPORT Packet {
  public:
    struct Header {
      boost::uint32_t length;
      boost::uint16_t requestId;
      boost::uint16_t reserved;
    };

  protected:
    Header *rawData;

  public:
    Packet(boost::uint16_t requestId, const void *data = 0, boost::uint32_t length = 0);

    Packet(const Packet &p) {
      rawData = reinterpret_cast<Header*>(std::malloc(p.getRawDataLength()));
      std::memcpy(rawData, p.rawData, p.getRawDataLength());
    }

    virtual ~Packet() {
      std::free(rawData);
    }

    Packet& operator=(const Packet &p);

    boost::uint16_t getRequestId() const {
      return ntohs(rawData->requestId);
    }

    boost::uint32_t getLength() const {
      return ntohl(rawData->length);
    }

    const boost::uint8_t* getData() const {
      return reinterpret_cast<boost::uint8_t*>(rawData)+sizeof(Header);
    }

    const boost::uint8_t* getRawData() const {
      return reinterpret_cast<boost::uint8_t*>(rawData);
    }

    unsigned long getRawDataLength() const {
      return sizeof(Header) + getLength();
    }
};

}
}

#endif /*MAD_NET_PACKET_H_*/