/*
 * 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>
#include <netinet/in.h>
#include <stdint.h>

namespace Mad {
namespace Net {

class Packet {
  public:
    enum Type {
      OK = 0x0000, ERROR = 0x0001, DISCONNECT = 0x0002, LOG = 0x0003,
      GSSAPI_AUTH = 0x0010, IDENTIFY = 0x0011,
      LIST_DAEMONS = 0x0020,
      STATUS = 0x0030, DAEMON_STATUS = 0x0031, FS_INFO = 0x0032, DAEMON_FS_INFO = 0x0033,
      COMMAND_SHUTDOWN = 0x0040, COMMAND_REBOOT = 0x0041,
      DAEMON_COMMAND_SHUTDOWN = 0x0050, DAEMON_COMMAND_REBOOT = 0x0051,
      DAEMON_STATE_UPDATE = 0x0060
    };

    struct Data {
      uint16_t type;
      uint16_t requestId;
      uint16_t reserved;
      uint16_t length;
      uint8_t data[0];
    };

  protected:
    Data *rawData;

    void setLength(uint16_t length) {
      rawData->length = htons(length);

      rawData = (Data*)std::realloc(rawData, getRawDataLength());
    }

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

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

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

    Packet& operator=(const Packet &p);

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

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

    uint16_t getLength() const {
      return ntohs(rawData->length);
    }

    const uint8_t* getData() const {
      return rawData->data;
    }

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

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


    static uint64_t htonll(uint64_t val);
    static uint64_t ntohll(uint64_t val);
};

}
}

#endif /*MAD_NET_PACKET_H_*/