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/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
* Copyright 2009-2014 Pierre Ossman for Cendio AB
*
* This 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 2 of the License, or
* (at your option) any later version.
*
* This software 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 software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
#include <stdio.h>
#include <rdr/InStream.h>
#include <rfb/msgTypes.h>
#include <rfb/Exception.h>
#include <rfb/util.h>
#include <rfb/SMsgHandler.h>
#include <rfb/SMsgReader.h>
#include <rfb/Configuration.h>
#include <rfb/LogWriter.h>
using namespace rfb;
static LogWriter vlog("SMsgReader");
static IntParameter maxCutText("MaxCutText", "Maximum permitted length of an incoming clipboard update", 256*1024);
SMsgReader::SMsgReader(SMsgHandler* handler_, rdr::InStream* is_)
: handler(handler_), is(is_)
{
}
SMsgReader::~SMsgReader()
{
}
void SMsgReader::readClientInit()
{
bool shared = is->readU8();
handler->clientInit(shared);
}
void SMsgReader::readMsg()
{
int msgType = is->readU8();
switch (msgType) {
case msgTypeSetPixelFormat:
readSetPixelFormat();
break;
case msgTypeSetEncodings:
readSetEncodings();
break;
case msgTypeSetDesktopSize:
readSetDesktopSize();
break;
case msgTypeFramebufferUpdateRequest:
readFramebufferUpdateRequest();
break;
case msgTypeEnableContinuousUpdates:
readEnableContinuousUpdates();
break;
case msgTypeClientFence:
readFence();
break;
case msgTypeKeyEvent:
readKeyEvent();
break;
case msgTypePointerEvent:
readPointerEvent();
break;
case msgTypeClientCutText:
readClientCutText();
break;
default:
fprintf(stderr, "unknown message type %d\n", msgType);
throw Exception("unknown message type");
}
}
void SMsgReader::readSetPixelFormat()
{
is->skip(3);
PixelFormat pf;
pf.read(is);
handler->setPixelFormat(pf);
}
void SMsgReader::readSetEncodings()
{
is->skip(1);
int nEncodings = is->readU16();
rdr::S32Array encodings(nEncodings);
for (int i = 0; i < nEncodings; i++)
encodings.buf[i] = is->readU32();
handler->setEncodings(nEncodings, encodings.buf);
}
void SMsgReader::readSetDesktopSize()
{
int width, height;
int screens, i;
rdr::U32 id, flags;
int sx, sy, sw, sh;
ScreenSet layout;
is->skip(1);
width = is->readU16();
height = is->readU16();
screens = is->readU8();
is->skip(1);
for (i = 0;i < screens;i++) {
id = is->readU32();
sx = is->readU16();
sy = is->readU16();
sw = is->readU16();
sh = is->readU16();
flags = is->readU32();
layout.add_screen(Screen(id, sx, sy, sw, sh, flags));
}
handler->setDesktopSize(width, height, layout);
}
void SMsgReader::readFramebufferUpdateRequest()
{
bool inc = is->readU8();
int x = is->readU16();
int y = is->readU16();
int w = is->readU16();
int h = is->readU16();
handler->framebufferUpdateRequest(Rect(x, y, x+w, y+h), inc);
}
void SMsgReader::readEnableContinuousUpdates()
{
bool enable;
int x, y, w, h;
enable = is->readU8();
x = is->readU16();
y = is->readU16();
w = is->readU16();
h = is->readU16();
handler->enableContinuousUpdates(enable, x, y, w, h);
}
void SMsgReader::readFence()
{
rdr::U32 flags;
rdr::U8 len;
char data[64];
is->skip(3);
flags = is->readU32();
len = is->readU8();
if (len > sizeof(data)) {
fprintf(stderr, "Ignoring fence with too large payload\n");
is->skip(len);
return;
}
is->readBytes(data, len);
handler->fence(flags, len, data);
}
void SMsgReader::readKeyEvent()
{
bool down = is->readU8();
is->skip(2);
rdr::U32 key = is->readU32();
handler->keyEvent(key, down);
}
void SMsgReader::readPointerEvent()
{
int mask = is->readU8();
int x = is->readU16();
int y = is->readU16();
handler->pointerEvent(Point(x, y), mask);
}
void SMsgReader::readClientCutText()
{
is->skip(3);
int len = is->readU32();
if (len > maxCutText) {
is->skip(len);
vlog.error("Cut text too long (%d bytes) - ignoring", len);
return;
}
CharArray ca(len+1);
ca.buf[len] = 0;
is->readBytes(ca.buf, len);
handler->clientCutText(ca.buf, len);
}
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