mirror of
https://github.com/kasmtech/KasmVNC.git
synced 2024-12-02 04:53:11 +01:00
331 lines
7.2 KiB
C++
331 lines
7.2 KiB
C++
/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
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* Copyright 2009-2014 Pierre Ossman for Cendio AB
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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#include <stdio.h>
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#include <rdr/InStream.h>
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#include <rdr/ZlibInStream.h>
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#include <rfb/msgTypes.h>
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#include <rfb/qemuTypes.h>
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#include <rfb/clipboardTypes.h>
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#include <rfb/Exception.h>
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#include <rfb/util.h>
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#include <rfb/SMsgHandler.h>
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#include <rfb/SMsgReader.h>
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#include <rfb/Configuration.h>
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#include <rfb/LogWriter.h>
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#include <rfb/ServerCore.h>
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using namespace rfb;
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static LogWriter vlog("SMsgReader");
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SMsgReader::SMsgReader(SMsgHandler* handler_, rdr::InStream* is_)
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: handler(handler_), is(is_)
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{
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}
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SMsgReader::~SMsgReader()
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{
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}
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void SMsgReader::readClientInit()
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{
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bool shared = is->readU8();
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handler->clientInit(shared);
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}
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void SMsgReader::readMsg()
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{
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int msgType = is->readU8();
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switch (msgType) {
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case msgTypeSetPixelFormat:
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readSetPixelFormat();
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break;
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case msgTypeSetEncodings:
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readSetEncodings();
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break;
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case msgTypeSetDesktopSize:
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readSetDesktopSize();
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break;
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case msgTypeSetMaxVideoResolution:
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readSetMaxVideoResolution();
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break;
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case msgTypeFramebufferUpdateRequest:
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readFramebufferUpdateRequest();
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break;
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case msgTypeEnableContinuousUpdates:
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readEnableContinuousUpdates();
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break;
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case msgTypeClientFence:
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readFence();
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break;
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case msgTypeRequestStats:
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readRequestStats();
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break;
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case msgTypeFrameStats:
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readFrameStats();
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break;
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case msgTypeBinaryClipboard:
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readBinaryClipboard();
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break;
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case msgTypeKeyEvent:
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readKeyEvent();
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break;
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case msgTypePointerEvent:
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readPointerEvent();
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break;
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case msgTypeClientCutText:
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readClientCutText();
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break;
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case msgTypeQEMUClientMessage:
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readQEMUMessage();
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break;
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default:
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fprintf(stderr, "unknown message type %d\n", msgType);
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throw Exception("unknown message type");
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}
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}
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void SMsgReader::readSetPixelFormat()
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{
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is->skip(3);
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PixelFormat pf;
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pf.read(is);
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handler->setPixelFormat(pf);
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}
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void SMsgReader::readSetEncodings()
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{
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is->skip(1);
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int nEncodings = is->readU16();
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rdr::S32Array encodings(nEncodings);
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for (int i = 0; i < nEncodings; i++)
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encodings.buf[i] = is->readU32();
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handler->setEncodings(nEncodings, encodings.buf);
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}
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void SMsgReader::readSetDesktopSize()
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{
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int width, height;
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int screens, i;
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rdr::U32 id, flags;
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int sx, sy, sw, sh;
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ScreenSet layout;
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is->skip(1);
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width = is->readU16();
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height = is->readU16();
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screens = is->readU8();
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is->skip(1);
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for (i = 0;i < screens;i++) {
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id = is->readU32();
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sx = is->readU16();
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sy = is->readU16();
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sw = is->readU16();
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sh = is->readU16();
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flags = is->readU32();
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layout.add_screen(Screen(id, sx, sy, sw, sh, flags));
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}
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handler->setDesktopSize(width, height, layout);
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}
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void SMsgReader::readSetMaxVideoResolution()
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{
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unsigned int width, height;
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char tmp[16];
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width = is->readU16();
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height = is->readU16();
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if (!rfb::Server::ignoreClientSettingsKasm && handler->canChangeKasmSettings()) {
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sprintf(tmp, "%ux%u", width, height);
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rfb::Server::maxVideoResolution.setParam(tmp);
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}
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}
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void SMsgReader::readFramebufferUpdateRequest()
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{
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bool inc = is->readU8();
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int x = is->readU16();
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int y = is->readU16();
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int w = is->readU16();
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int h = is->readU16();
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handler->framebufferUpdateRequest(Rect(x, y, x+w, y+h), inc);
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}
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void SMsgReader::readEnableContinuousUpdates()
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{
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bool enable;
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int x, y, w, h;
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enable = is->readU8();
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x = is->readU16();
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y = is->readU16();
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w = is->readU16();
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h = is->readU16();
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handler->enableContinuousUpdates(enable, x, y, w, h);
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}
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void SMsgReader::readFence()
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{
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rdr::U32 flags;
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rdr::U8 len;
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char data[64];
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is->skip(3);
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flags = is->readU32();
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len = is->readU8();
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if (len > sizeof(data)) {
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fprintf(stderr, "Ignoring fence with too large payload\n");
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is->skip(len);
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return;
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}
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is->readBytes(data, len);
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handler->fence(flags, len, data);
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}
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void SMsgReader::readKeyEvent()
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{
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bool down = is->readU8();
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is->skip(2);
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rdr::U32 key = is->readU32();
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handler->keyEvent(key, 0, down);
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}
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void SMsgReader::readPointerEvent()
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{
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int mask = is->readU8();
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int x = is->readU16();
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int y = is->readU16();
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int scrollX = is->readS16();
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int scrollY = is->readS16();
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handler->pointerEvent(Point(x, y), mask, false, false, scrollX, scrollY);
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}
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void SMsgReader::readClientCutText()
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{
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is->skip(3);
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rdr::U32 len = is->readU32();
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if (len & 0x80000000) {
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rdr::S32 slen = len;
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slen = -slen;
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readExtendedClipboard(slen);
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return;
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}
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is->skip(len);
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vlog.error("Client sent old cuttext msg, ignoring");
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}
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void SMsgReader::readBinaryClipboard()
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{
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const rdr::U8 num = is->readU8();
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rdr::U8 i, valid = 0;
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char tmpmimes[num][32];
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handler->clearBinaryClipboard();
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for (i = 0; i < num; i++) {
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const rdr::U8 mimelen = is->readU8();
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if (mimelen > 32 - 1) {
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vlog.error("Mime too long (%u)", mimelen);
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}
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char mime[mimelen + 1];
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mime[mimelen] = '\0';
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is->readBytes(mime, mimelen);
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strncpy(tmpmimes[valid], mime, 32);
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tmpmimes[valid][31] = '\0';
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const rdr::U32 len = is->readU32();
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CharArray ca(len);
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is->readBytes(ca.buf, len);
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if (rfb::Server::DLP_ClipAcceptMax && len > (unsigned) rfb::Server::DLP_ClipAcceptMax) {
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vlog.info("DLP: refused to receive binary clipboard, too large");
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continue;
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}
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vlog.debug("Received binary clipboard, type %s, %u bytes", mime, len);
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handler->addBinaryClipboard(mime, (rdr::U8 *) ca.buf, len, 0);
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valid++;
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}
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handler->handleClipboardAnnounceBinary(valid, tmpmimes);
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}
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void SMsgReader::readExtendedClipboard(rdr::S32 len)
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{
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if (len < 4)
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throw Exception("Invalid extended clipboard message");
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vlog.error("Client sent old cuttext msg, ignoring");
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is->skip(len);
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}
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void SMsgReader::readRequestStats()
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{
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is->skip(3);
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handler->sendStats();
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}
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void SMsgReader::readFrameStats()
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{
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is->skip(3);
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rdr::U32 all = is->readU32();
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rdr::U32 render = is->readU32();
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handler->handleFrameStats(all, render);
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}
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void SMsgReader::readQEMUMessage()
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{
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int subType = is->readU8();
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switch (subType) {
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case qemuExtendedKeyEvent:
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readQEMUKeyEvent();
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break;
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default:
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throw Exception("unknown QEMU submessage type %d", subType);
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}
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}
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void SMsgReader::readQEMUKeyEvent()
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{
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bool down = is->readU16();
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rdr::U32 keysym = is->readU32();
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rdr::U32 keycode = is->readU32();
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if (!keycode) {
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vlog.error("Key event without keycode - ignoring");
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return;
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}
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handler->keyEvent(keysym, keycode, down);
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}
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