tibia-client/src/framework/net/outputmessage.h

/*
 * Copyright (c) 2010-2017 OTClient <https://github.com/edubart/otclient>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#ifndef OUTPUTMESSAGE_H
#define OUTPUTMESSAGE_H

#include "declarations.h"
#include <framework/luaengine/luaobject.h>

// @bindclass
class OutputMessage : public LuaObject
{
public:
    enum {
        BUFFER_MAXSIZE = 65536,
        MAX_STRING_LENGTH = 65536,
        MAX_HEADER_SIZE = 8
    };

    OutputMessage();

    void reset();

    std::string getBuffer() { return std::string((char*)m_buffer + m_headerPos, m_messageSize); }

    void addU8(uint8 value);
    void addU16(uint16 value);
    void addU32(uint32 value);
    void addU64(uint64 value);
    void addString(const std::string& buffer);
    void addPaddingBytes(int bytes, uint8 byte = 0);

    void encryptRsa();

    uint16 getWritePos() { return m_writePos; }
    uint16 getMessageSize() { return m_messageSize; }

    void setWritePos(uint16 writePos) { m_writePos = writePos; }
    void setMessageSize(uint16 messageSize) { m_messageSize = messageSize; }

protected:
    uint8* getWriteBuffer() { return m_buffer + m_writePos; }
    uint8* getHeaderBuffer() { return m_buffer + m_headerPos; }
    uint8* getDataBuffer() { return m_buffer + MAX_HEADER_SIZE; }

    void writeChecksum();
    void writeMessageSize();

    friend class Protocol;

private:
    bool canWrite(int bytes);
    void checkWrite(int bytes);

    uint16 m_headerPos;
    uint16 m_writePos;
    uint16 m_messageSize;
    uint8 m_buffer[BUFFER_MAXSIZE];
};

#endif