vncserver.hh

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/*
 * Copyright (c) 2010, 2015 ARM Limited
 * All rights reserved
 *
 * The license below extends only to copyright in the software and shall
 * not be construed as granting a license to any other intellectual
 * property including but not limited to intellectual property relating
 * to a hardware implementation of the functionality of the software
 * licensed hereunder.  You may use the software subject to the license
 * terms below provided that you ensure that this notice is replicated
 * unmodified and in its entirety in all distributions of the software,
 * modified or unmodified, in source code or in binary form.
 *
 * 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;
 * neither the name of the copyright holders nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Authors: Ali Saidi
 *          William Wang
 */

#ifndef __BASE_VNC_VNC_SERVER_HH__
#define __BASE_VNC_VNC_SERVER_HH__

#include <iostream>

#include "base/vnc/vncinput.hh"
#include "base/circlebuf.hh"
#include "base/pollevent.hh"
#include "base/socket.hh"
#include "params/VncServer.hh"
#include "sim/sim_object.hh"

class VncServer : public VncInput
{
  public:

    const static uint32_t AuthInvalid = 0;
    const static uint32_t AuthNone    = 1;

    const static uint32_t VncOK   = 0;

    enum ServerMessages {
        ServerFrameBufferUpdate     = 0,
        ServerSetColorMapEntries    = 1,
        ServerBell                  = 2,
        ServerCutText               = 3
    };

    enum EncodingTypes {
        EncodingRaw         = 0,
        EncodingCopyRect    = 1,
        EncodingHextile     = 5,
        EncodingDesktopSize = -223
    };

    enum MouseEvents {
        MouseLeftButton     = 0x1,
        MouseRightButton    = 0x2,
        MouseMiddleButton   = 0x4
    };

    const char* vncVersion() const
    {
        return "RFB 003.008\n";
    }

    enum ConnectionState {
        WaitForProtocolVersion,
        WaitForSecurityResponse,
        WaitForClientInit,
        InitializationPhase,
        NormalPhase
    };

    struct ServerInitMsg {
        uint16_t fbWidth;
        uint16_t fbHeight;
        PixelFormat px;
        uint32_t namelen;
        char name[2]; // just to put M5 in here
    } M5_ATTR_PACKED;

    struct FrameBufferUpdate {
        uint8_t type;
        uint8_t padding;
        uint16_t num_rects;
    } M5_ATTR_PACKED;

    struct FrameBufferRect {
        uint16_t x;
        uint16_t y;
        uint16_t width;
        uint16_t height;
        int32_t encoding;
    } M5_ATTR_PACKED;

    struct ServerCutText {
        uint8_t type;
        uint8_t padding[3];
        uint32_t length;
    } M5_ATTR_PACKED;

  protected:
    class ListenEvent: public PollEvent
    {
      protected:
        VncServer *vncserver;

      public:
        ListenEvent(VncServer *vs, int fd, int e);
        void process(int revent);
    };

    friend class ListenEvent;
    ListenEvent *listenEvent;

    class DataEvent: public PollEvent
    {
      protected:
        VncServer *vncserver;

      public:
        DataEvent(VncServer *vs, int fd, int e);
        void process(int revent);
    };

    friend class DataEvent;
    DataEvent *dataEvent;

    int number;
    int dataFd; // data stream file describer

    ListenSocket listener;

    void listen(int port);
    void accept();
    void data();
    void detach();

  public:
    typedef VncServerParams Params;
    VncServer(const Params *p);
    ~VncServer();

    // RFB
  protected:

    ConnectionState curState;

    bool sendUpdate;

    PixelFormat pixelFormat;

    bool supportsRawEnc;

    bool supportsResizeEnc;

  protected:
    void sendError(const char* error_msg);

    bool read(uint8_t *buf, size_t len);

    bool read1(uint8_t *buf, size_t len);


    template <typename T> bool read(T* val);


    bool write(const uint8_t *buf, size_t len);

    template <typename T> bool write(T* val);

    bool write(const char* str);

    void checkProtocolVersion();

    void checkSecurity();

    void sendServerInit();

    void sendError(std::string error_msg);

    void sendFrameBufferUpdate();

    void setPixelFormat();

    void setEncodings();

    void requestFbUpdate();

    void recvKeyboardInput();

    void recvPointerInput();

    void recvCutText();

    void sendFrameBufferResized();

    static const PixelConverter pixelConverter;

  public:
    void setDirty() override;
    void frameBufferResized() override;
};

#endif