/*
 * 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 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 General Public License for more details.
 *
 * You should have received a copy of the GNU 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 <cstdlib>
#include <cstring>

namespace Mad {
namespace Net {

class Packet {
  public:
    enum Type {
      TYPE_OK = 0x0000, TYPE_ERROR = 0x0001, TYPE_DISCONNECT = 0x0002,
      TYPE_IDENTIFY_REQ = 0x0010, TYPE_IDENTIFY_REP = 0x0011
    };

    struct Data {
      unsigned short type;
      unsigned short requestId;
      unsigned short reserved;
      unsigned short length;
      unsigned char data[0];
    };

  protected:
    Data *rawData;

  public:
    Packet(Type type, unsigned short requestId, const void *data = NULL, unsigned short length = 0) {
      rawData = (Data*)std::malloc(sizeof(Data)+length);

      rawData->type = type;
      rawData->requestId = requestId;
      rawData->reserved = 0;
      rawData->length = length;

      if(length)
        std::memcpy(rawData->data, data, length);
    }

    Packet(const Packet &p) {
      rawData = (Data*)std::malloc(p.getRawDataLength());
      std::memcpy(rawData, p.rawData, p.getRawDataLength());
    }

    Packet& operator=(Packet &p) {
      if(&p == this)
        return *this;

      std::free(rawData);

      rawData = (Data*)std::malloc(p.getRawDataLength());
      std::memcpy(rawData, p.rawData, p.getRawDataLength());

      return *this;
    }

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

    Type getType() const {
      return (Type)rawData->type;
    }

    unsigned short getRequestId() const {
      return rawData->requestId;
    }

    unsigned short getLength() const {
      return rawData->length;
    }

    const unsigned char* getData() const {
      return rawData->data;
    }

    const Data* getRawData() const {
      return rawData;
    }

    unsigned long getRawDataLength() const {
      return sizeof(Data) + rawData->length;
    }
};

}
}

#endif /*MAD_NET_PACKET_H_*/