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|
/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
* Copyright (C) 2011 D. R. Commander. All Rights Reserved.
* Copyright 2009-2019 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.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <rdr/OutStream.h>
#include <rdr/MemOutStream.h>
#include <rdr/ZlibOutStream.h>
#include <rfb/msgTypes.h>
#include <rfb/fenceTypes.h>
#include <rfb/clipboardTypes.h>
#include <rfb/Exception.h>
#include <rfb/ClientParams.h>
#include <rfb/UpdateTracker.h>
#include <rfb/Encoder.h>
#include <rfb/SMsgWriter.h>
#include <rfb/LogWriter.h>
#include <rfb/ledStates.h>
#include <rfb/util.h>
using namespace rfb;
static LogWriter vlog("SMsgWriter");
SMsgWriter::SMsgWriter(ClientParams* client_, rdr::OutStream* os_)
: client(client_), os(os_),
nRectsInUpdate(0), nRectsInHeader(0),
needSetDesktopName(false), needCursor(false),
needCursorPos(false), needLEDState(false),
needQEMUKeyEvent(false)
{
}
SMsgWriter::~SMsgWriter()
{
}
void SMsgWriter::writeServerInit(uint16_t width, uint16_t height,
const PixelFormat& pf, const char* name)
{
os->writeU16(width);
os->writeU16(height);
pf.write(os);
os->writeU32(strlen(name));
os->writeBytes((const uint8_t*)name, strlen(name));
endMsg();
}
void SMsgWriter::writeSetColourMapEntries(int firstColour, int nColours,
const uint16_t red[],
const uint16_t green[],
const uint16_t blue[])
{
startMsg(msgTypeSetColourMapEntries);
os->pad(1);
os->writeU16(firstColour);
os->writeU16(nColours);
for (int i = firstColour; i < firstColour+nColours; i++) {
os->writeU16(red[i]);
os->writeU16(green[i]);
os->writeU16(blue[i]);
}
endMsg();
}
void SMsgWriter::writeBell()
{
startMsg(msgTypeBell);
endMsg();
}
void SMsgWriter::writeServerCutText(const char* str)
{
if (strchr(str, '\r') != nullptr)
throw Exception("Invalid carriage return in clipboard data");
std::string latin1(utf8ToLatin1(str));
startMsg(msgTypeServerCutText);
os->pad(3);
os->writeU32(latin1.size());
os->writeBytes((const uint8_t*)latin1.data(), latin1.size());
endMsg();
}
void SMsgWriter::writeClipboardCaps(uint32_t caps,
const uint32_t* lengths)
{
size_t i, count;
if (!client->supportsEncoding(pseudoEncodingExtendedClipboard))
throw Exception("Client does not support extended clipboard");
count = 0;
for (i = 0;i < 16;i++) {
if (caps & (1 << i))
count++;
}
startMsg(msgTypeServerCutText);
os->pad(3);
os->writeS32(-(4 + 4 * count));
os->writeU32(caps | clipboardCaps);
count = 0;
for (i = 0;i < 16;i++) {
if (caps & (1 << i))
os->writeU32(lengths[count++]);
}
endMsg();
}
void SMsgWriter::writeClipboardRequest(uint32_t flags)
{
if (!client->supportsEncoding(pseudoEncodingExtendedClipboard))
throw Exception("Client does not support extended clipboard");
if (!(client->clipboardFlags() & clipboardRequest))
throw Exception("Client does not support clipboard \"request\" action");
startMsg(msgTypeServerCutText);
os->pad(3);
os->writeS32(-4);
os->writeU32(flags | clipboardRequest);
endMsg();
}
void SMsgWriter::writeClipboardPeek(uint32_t flags)
{
if (!client->supportsEncoding(pseudoEncodingExtendedClipboard))
throw Exception("Client does not support extended clipboard");
if (!(client->clipboardFlags() & clipboardPeek))
throw Exception("Client does not support clipboard \"peek\" action");
startMsg(msgTypeServerCutText);
os->pad(3);
os->writeS32(-4);
os->writeU32(flags | clipboardPeek);
endMsg();
}
void SMsgWriter::writeClipboardNotify(uint32_t flags)
{
if (!client->supportsEncoding(pseudoEncodingExtendedClipboard))
throw Exception("Client does not support extended clipboard");
if (!(client->clipboardFlags() & clipboardNotify))
throw Exception("Client does not support clipboard \"notify\" action");
startMsg(msgTypeServerCutText);
os->pad(3);
os->writeS32(-4);
os->writeU32(flags | clipboardNotify);
endMsg();
}
void SMsgWriter::writeClipboardProvide(uint32_t flags,
const size_t* lengths,
const uint8_t* const* data)
{
rdr::MemOutStream mos;
rdr::ZlibOutStream zos;
int i, count;
if (!client->supportsEncoding(pseudoEncodingExtendedClipboard))
throw Exception("Client does not support extended clipboard");
if (!(client->clipboardFlags() & clipboardProvide))
throw Exception("Client does not support clipboard \"provide\" action");
zos.setUnderlying(&mos);
count = 0;
for (i = 0;i < 16;i++) {
if (!(flags & (1 << i)))
continue;
zos.writeU32(lengths[count]);
zos.writeBytes(data[count], lengths[count]);
count++;
}
zos.flush();
startMsg(msgTypeServerCutText);
os->pad(3);
os->writeS32(-(4 + mos.length()));
os->writeU32(flags | clipboardProvide);
os->writeBytes(mos.data(), mos.length());
endMsg();
}
void SMsgWriter::writeFence(uint32_t flags, unsigned len,
const uint8_t data[])
{
if (!client->supportsEncoding(pseudoEncodingFence))
throw Exception("Client does not support fences");
if (len > 64)
throw Exception("Too large fence payload");
if ((flags & ~fenceFlagsSupported) != 0)
throw Exception("Unknown fence flags");
startMsg(msgTypeServerFence);
os->pad(3);
os->writeU32(flags);
os->writeU8(len);
if (len > 0)
os->writeBytes(data, len);
endMsg();
}
void SMsgWriter::writeEndOfContinuousUpdates()
{
if (!client->supportsEncoding(pseudoEncodingContinuousUpdates))
throw Exception("Client does not support continuous updates");
startMsg(msgTypeEndOfContinuousUpdates);
endMsg();
}
void SMsgWriter::writeDesktopSize(uint16_t reason, uint16_t result)
{
ExtendedDesktopSizeMsg msg;
if (!client->supportsEncoding(pseudoEncodingDesktopSize) &&
!client->supportsEncoding(pseudoEncodingExtendedDesktopSize))
throw Exception("Client does not support desktop size changes");
msg.reason = reason;
msg.result = result;
extendedDesktopSizeMsgs.push_back(msg);
}
void SMsgWriter::writeSetDesktopName()
{
if (!client->supportsEncoding(pseudoEncodingDesktopName))
throw Exception("Client does not support desktop name changes");
needSetDesktopName = true;
}
void SMsgWriter::writeCursor()
{
if (!client->supportsEncoding(pseudoEncodingCursor) &&
!client->supportsEncoding(pseudoEncodingXCursor) &&
!client->supportsEncoding(pseudoEncodingCursorWithAlpha) &&
!client->supportsEncoding(pseudoEncodingVMwareCursor))
throw Exception("Client does not support local cursor");
needCursor = true;
}
void SMsgWriter::writeCursorPos()
{
if (!client->supportsEncoding(pseudoEncodingVMwareCursorPosition))
throw Exception("Client does not support cursor position");
needCursorPos = true;
}
void SMsgWriter::writeLEDState()
{
if (!client->supportsEncoding(pseudoEncodingLEDState) &&
!client->supportsEncoding(pseudoEncodingVMwareLEDState))
throw Exception("Client does not support LED state");
if (client->ledState() == ledUnknown)
throw Exception("Server has not specified LED state");
needLEDState = true;
}
void SMsgWriter::writeQEMUKeyEvent()
{
if (!client->supportsEncoding(pseudoEncodingQEMUKeyEvent))
throw Exception("Client does not support QEMU key events");
needQEMUKeyEvent = true;
}
bool SMsgWriter::needFakeUpdate()
{
if (needSetDesktopName)
return true;
if (needCursor)
return true;
if (needCursorPos)
return true;
if (needLEDState)
return true;
if (needQEMUKeyEvent)
return true;
if (needNoDataUpdate())
return true;
return false;
}
bool SMsgWriter::needNoDataUpdate()
{
if (!extendedDesktopSizeMsgs.empty())
return true;
return false;
}
void SMsgWriter::writeNoDataUpdate()
{
int nRects;
nRects = 0;
if (!extendedDesktopSizeMsgs.empty()) {
if (client->supportsEncoding(pseudoEncodingExtendedDesktopSize))
nRects += extendedDesktopSizeMsgs.size();
else
nRects++;
}
writeFramebufferUpdateStart(nRects);
writeNoDataRects();
writeFramebufferUpdateEnd();
}
void SMsgWriter::writeFramebufferUpdateStart(int nRects)
{
startMsg(msgTypeFramebufferUpdate);
os->pad(1);
if (nRects != 0xFFFF) {
if (needSetDesktopName)
nRects++;
if (needCursor)
nRects++;
if (needCursorPos)
nRects++;
if (needLEDState)
nRects++;
if (needQEMUKeyEvent)
nRects++;
}
os->writeU16(nRects);
nRectsInUpdate = 0;
if (nRects == 0xFFFF)
nRectsInHeader = 0;
else
nRectsInHeader = nRects;
writePseudoRects();
}
void SMsgWriter::writeFramebufferUpdateEnd()
{
if (nRectsInUpdate != nRectsInHeader && nRectsInHeader)
throw Exception("SMsgWriter::writeFramebufferUpdateEnd: "
"nRects out of sync");
if (nRectsInHeader == 0) {
// Send last rect. marker
os->writeS16(0);
os->writeS16(0);
os->writeU16(0);
os->writeU16(0);
os->writeU32(pseudoEncodingLastRect);
}
endMsg();
}
void SMsgWriter::writeCopyRect(const Rect& r, int srcX, int srcY)
{
startRect(r,encodingCopyRect);
os->writeU16(srcX);
os->writeU16(srcY);
endRect();
}
void SMsgWriter::startRect(const Rect& r, int encoding)
{
if (++nRectsInUpdate > nRectsInHeader && nRectsInHeader)
throw Exception("SMsgWriter::startRect: nRects out of sync");
os->writeS16(r.tl.x);
os->writeS16(r.tl.y);
os->writeU16(r.width());
os->writeU16(r.height());
os->writeU32(encoding);
}
void SMsgWriter::endRect()
{
os->flush();
}
void SMsgWriter::startMsg(int type)
{
os->writeU8(type);
}
void SMsgWriter::endMsg()
{
os->flush();
}
void SMsgWriter::writePseudoRects()
{
if (needCursor) {
const Cursor& cursor = client->cursor();
if (client->supportsEncoding(pseudoEncodingCursorWithAlpha)) {
writeSetCursorWithAlphaRect(cursor.width(), cursor.height(),
cursor.hotspot().x, cursor.hotspot().y,
cursor.getBuffer());
} else if (client->supportsEncoding(pseudoEncodingVMwareCursor)) {
writeSetVMwareCursorRect(cursor.width(), cursor.height(),
cursor.hotspot().x, cursor.hotspot().y,
cursor.getBuffer());
} else if (client->supportsEncoding(pseudoEncodingCursor)) {
size_t data_len = cursor.width()*cursor.height() *
(client->pf().bpp/8);
std::vector<uint8_t> data(data_len);
std::vector<uint8_t> mask(cursor.getMask());
const uint8_t* in;
uint8_t* out;
in = cursor.getBuffer();
out = data.data();
for (int i = 0;i < cursor.width()*cursor.height();i++) {
client->pf().bufferFromRGB(out, in, 1);
in += 4;
out += client->pf().bpp/8;
}
writeSetCursorRect(cursor.width(), cursor.height(),
cursor.hotspot().x, cursor.hotspot().y,
data.data(), mask.data());
} else if (client->supportsEncoding(pseudoEncodingXCursor)) {
std::vector<uint8_t> bitmap(cursor.getBitmap());
std::vector<uint8_t> mask(cursor.getMask());
writeSetXCursorRect(cursor.width(), cursor.height(),
cursor.hotspot().x, cursor.hotspot().y,
bitmap.data(), mask.data());
} else {
throw Exception("Client does not support local cursor");
}
needCursor = false;
}
if (needCursorPos) {
const Point& cursorPos = client->cursorPos();
if (client->supportsEncoding(pseudoEncodingVMwareCursorPosition)) {
writeSetVMwareCursorPositionRect(cursorPos.x, cursorPos.y);
} else {
throw Exception("Client does not support cursor position");
}
needCursorPos = false;
}
if (needSetDesktopName) {
writeSetDesktopNameRect(client->name());
needSetDesktopName = false;
}
if (needLEDState) {
writeLEDStateRect(client->ledState());
needLEDState = false;
}
if (needQEMUKeyEvent) {
writeQEMUKeyEventRect();
needQEMUKeyEvent = false;
}
}
void SMsgWriter::writeNoDataRects()
{
if (!extendedDesktopSizeMsgs.empty()) {
if (client->supportsEncoding(pseudoEncodingExtendedDesktopSize)) {
for (ExtendedDesktopSizeMsg msg : extendedDesktopSizeMsgs) {
// FIXME: We can probably skip multiple reasonServer entries
writeExtendedDesktopSizeRect(msg.reason, msg.result,
client->width(), client->height(),
client->screenLayout());
}
} else if (client->supportsEncoding(pseudoEncodingDesktopSize)) {
// Some clients assume this is the last rectangle so don't send anything
// more after this
writeSetDesktopSizeRect(client->width(), client->height());
} else {
throw Exception("Client does not support desktop size changes");
}
extendedDesktopSizeMsgs.clear();
}
}
void SMsgWriter::writeSetDesktopSizeRect(int width, int height)
{
if (!client->supportsEncoding(pseudoEncodingDesktopSize))
throw Exception("Client does not support desktop resize");
if (++nRectsInUpdate > nRectsInHeader && nRectsInHeader)
throw Exception("SMsgWriter::writeSetDesktopSizeRect: nRects out of sync");
os->writeS16(0);
os->writeS16(0);
os->writeU16(width);
os->writeU16(height);
os->writeU32(pseudoEncodingDesktopSize);
}
void SMsgWriter::writeExtendedDesktopSizeRect(uint16_t reason,
uint16_t result,
int fb_width,
int fb_height,
const ScreenSet& layout)
{
ScreenSet::const_iterator si;
if (!client->supportsEncoding(pseudoEncodingExtendedDesktopSize))
throw Exception("Client does not support extended desktop resize");
if (++nRectsInUpdate > nRectsInHeader && nRectsInHeader)
throw Exception("SMsgWriter::writeExtendedDesktopSizeRect: nRects out of sync");
os->writeU16(reason);
os->writeU16(result);
os->writeU16(fb_width);
os->writeU16(fb_height);
os->writeU32(pseudoEncodingExtendedDesktopSize);
os->writeU8(layout.num_screens());
os->pad(3);
for (si = layout.begin();si != layout.end();++si) {
os->writeU32(si->id);
os->writeU16(si->dimensions.tl.x);
os->writeU16(si->dimensions.tl.y);
os->writeU16(si->dimensions.width());
os->writeU16(si->dimensions.height());
os->writeU32(si->flags);
}
}
void SMsgWriter::writeSetDesktopNameRect(const char *name)
{
if (!client->supportsEncoding(pseudoEncodingDesktopName))
throw Exception("Client does not support desktop rename");
if (++nRectsInUpdate > nRectsInHeader && nRectsInHeader)
throw Exception("SMsgWriter::writeSetDesktopNameRect: nRects out of sync");
os->writeS16(0);
os->writeS16(0);
os->writeU16(0);
os->writeU16(0);
os->writeU32(pseudoEncodingDesktopName);
os->writeU32(strlen(name));
os->writeBytes((const uint8_t*)name, strlen(name));
}
void SMsgWriter::writeSetCursorRect(int width, int height,
int hotspotX, int hotspotY,
const uint8_t* data,
const uint8_t* mask)
{
if (!client->supportsEncoding(pseudoEncodingCursor))
throw Exception("Client does not support local cursors");
if (++nRectsInUpdate > nRectsInHeader && nRectsInHeader)
throw Exception("SMsgWriter::writeSetCursorRect: nRects out of sync");
os->writeS16(hotspotX);
os->writeS16(hotspotY);
os->writeU16(width);
os->writeU16(height);
os->writeU32(pseudoEncodingCursor);
os->writeBytes(data, width * height * (client->pf().bpp/8));
os->writeBytes(mask, (width+7)/8 * height);
}
void SMsgWriter::writeSetXCursorRect(int width, int height,
int hotspotX, int hotspotY,
const uint8_t* data,
const uint8_t* mask)
{
if (!client->supportsEncoding(pseudoEncodingXCursor))
throw Exception("Client does not support local cursors");
if (++nRectsInUpdate > nRectsInHeader && nRectsInHeader)
throw Exception("SMsgWriter::writeSetXCursorRect: nRects out of sync");
os->writeS16(hotspotX);
os->writeS16(hotspotY);
os->writeU16(width);
os->writeU16(height);
os->writeU32(pseudoEncodingXCursor);
if (width * height > 0) {
os->writeU8(255);
os->writeU8(255);
os->writeU8(255);
os->writeU8(0);
os->writeU8(0);
os->writeU8(0);
os->writeBytes(data, (width+7)/8 * height);
os->writeBytes(mask, (width+7)/8 * height);
}
}
void SMsgWriter::writeSetCursorWithAlphaRect(int width, int height,
int hotspotX, int hotspotY,
const uint8_t* data)
{
if (!client->supportsEncoding(pseudoEncodingCursorWithAlpha))
throw Exception("Client does not support local cursors");
if (++nRectsInUpdate > nRectsInHeader && nRectsInHeader)
throw Exception("SMsgWriter::writeSetCursorWithAlphaRect: nRects out of sync");
os->writeS16(hotspotX);
os->writeS16(hotspotY);
os->writeU16(width);
os->writeU16(height);
os->writeU32(pseudoEncodingCursorWithAlpha);
// FIXME: Use an encoder with compression?
os->writeU32(encodingRaw);
// Alpha needs to be pre-multiplied
for (int i = 0;i < width*height;i++) {
os->writeU8((unsigned)data[0] * data[3] / 255);
os->writeU8((unsigned)data[1] * data[3] / 255);
os->writeU8((unsigned)data[2] * data[3] / 255);
os->writeU8(data[3]);
data += 4;
}
}
void SMsgWriter::writeSetVMwareCursorRect(int width, int height,
int hotspotX, int hotspotY,
const uint8_t* data)
{
if (!client->supportsEncoding(pseudoEncodingVMwareCursor))
throw Exception("Client does not support local cursors");
if (++nRectsInUpdate > nRectsInHeader && nRectsInHeader)
throw Exception("SMsgWriter::writeSetVMwareCursorRect: nRects out of sync");
os->writeS16(hotspotX);
os->writeS16(hotspotY);
os->writeU16(width);
os->writeU16(height);
os->writeU32(pseudoEncodingVMwareCursor);
os->writeU8(1); // Alpha cursor
os->pad(1);
// FIXME: Should alpha be premultiplied?
os->writeBytes(data, width*height*4);
}
void SMsgWriter::writeSetVMwareCursorPositionRect(int hotspotX, int hotspotY)
{
if (!client->supportsEncoding(pseudoEncodingVMwareCursorPosition))
throw Exception("Client does not support cursor position");
if (++nRectsInUpdate > nRectsInHeader && nRectsInHeader)
throw Exception("SMsgWriter::writeSetVMwareCursorRect: nRects out of sync");
os->writeS16(hotspotX);
os->writeS16(hotspotY);
os->writeU16(0);
os->writeU16(0);
os->writeU32(pseudoEncodingVMwareCursorPosition);
}
void SMsgWriter::writeLEDStateRect(uint8_t state)
{
if (!client->supportsEncoding(pseudoEncodingLEDState) &&
!client->supportsEncoding(pseudoEncodingVMwareLEDState))
throw Exception("Client does not support LED state updates");
if (client->ledState() == ledUnknown)
throw Exception("Server does not support LED state updates");
if (++nRectsInUpdate > nRectsInHeader && nRectsInHeader)
throw Exception("SMsgWriter::writeLEDStateRect: nRects out of sync");
os->writeS16(0);
os->writeS16(0);
os->writeU16(0);
os->writeU16(0);
if (client->supportsEncoding(pseudoEncodingLEDState)) {
os->writeU32(pseudoEncodingLEDState);
os->writeU8(state);
} else {
os->writeU32(pseudoEncodingVMwareLEDState);
os->writeU32(state);
}
}
void SMsgWriter::writeQEMUKeyEventRect()
{
if (!client->supportsEncoding(pseudoEncodingQEMUKeyEvent))
throw Exception("Client does not support QEMU extended key events");
if (++nRectsInUpdate > nRectsInHeader && nRectsInHeader)
throw Exception("SMsgWriter::writeQEMUKeyEventRect: nRects out of sync");
os->writeS16(0);
os->writeS16(0);
os->writeU16(0);
os->writeU16(0);
os->writeU32(pseudoEncodingQEMUKeyEvent);
}
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