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/* Copyright (C) 2002-2005 RealVNC Ltd. 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/qemuTypes.h>
#include <rfb/clipboardTypes.h>
#include <rfb/Exception.h>
#include <rfb/PixelFormat.h>
#include <rfb/Rect.h>
#include <rfb/ServerParams.h>
#include <rfb/CMsgWriter.h>
#include <rfb/util.h>
using namespace rfb;
CMsgWriter::CMsgWriter(ServerParams* server_, rdr::OutStream* os_)
: server(server_), os(os_)
{
}
CMsgWriter::~CMsgWriter()
{
}
void CMsgWriter::writeClientInit(bool shared)
{
os->writeU8(shared);
endMsg();
}
void CMsgWriter::writeSetPixelFormat(const PixelFormat& pf)
{
startMsg(msgTypeSetPixelFormat);
os->pad(3);
pf.write(os);
endMsg();
}
void CMsgWriter::writeSetEncodings(const std::list<uint32_t> encodings)
{
startMsg(msgTypeSetEncodings);
os->pad(1);
os->writeU16(encodings.size());
for (uint32_t encoding : encodings)
os->writeU32(encoding);
endMsg();
}
void CMsgWriter::writeSetDesktopSize(int width, int height,
const ScreenSet& layout)
{
if (!server->supportsSetDesktopSize)
throw Exception("Server does not support SetDesktopSize");
startMsg(msgTypeSetDesktopSize);
os->pad(1);
os->writeU16(width);
os->writeU16(height);
os->writeU8(layout.num_screens());
os->pad(1);
ScreenSet::const_iterator iter;
for (iter = layout.begin();iter != layout.end();++iter) {
os->writeU32(iter->id);
os->writeU16(iter->dimensions.tl.x);
os->writeU16(iter->dimensions.tl.y);
os->writeU16(iter->dimensions.width());
os->writeU16(iter->dimensions.height());
os->writeU32(iter->flags);
}
endMsg();
}
void CMsgWriter::writeFramebufferUpdateRequest(const Rect& r, bool incremental)
{
startMsg(msgTypeFramebufferUpdateRequest);
os->writeU8(incremental);
os->writeU16(r.tl.x);
os->writeU16(r.tl.y);
os->writeU16(r.width());
os->writeU16(r.height());
endMsg();
}
void CMsgWriter::writeEnableContinuousUpdates(bool enable,
int x, int y, int w, int h)
{
if (!server->supportsContinuousUpdates)
throw Exception("Server does not support continuous updates");
startMsg(msgTypeEnableContinuousUpdates);
os->writeU8(!!enable);
os->writeU16(x);
os->writeU16(y);
os->writeU16(w);
os->writeU16(h);
endMsg();
}
void CMsgWriter::writeFence(uint32_t flags, unsigned len, const uint8_t data[])
{
if (!server->supportsFence)
throw Exception("Server does not support fences");
if (len > 64)
throw Exception("Too large fence payload");
if ((flags & ~fenceFlagsSupported) != 0)
throw Exception("Unknown fence flags");
startMsg(msgTypeClientFence);
os->pad(3);
os->writeU32(flags);
os->writeU8(len);
os->writeBytes(data, len);
endMsg();
}
void CMsgWriter::writeKeyEvent(uint32_t keysym, uint32_t keycode, bool down)
{
if (!server->supportsQEMUKeyEvent || !keycode) {
/* This event isn't meaningful without a valid keysym */
if (!keysym)
return;
startMsg(msgTypeKeyEvent);
os->writeU8(down);
os->pad(2);
os->writeU32(keysym);
endMsg();
} else {
startMsg(msgTypeQEMUClientMessage);
os->writeU8(qemuExtendedKeyEvent);
os->writeU16(down);
os->writeU32(keysym);
os->writeU32(keycode);
endMsg();
}
}
void CMsgWriter::writePointerEvent(const Point& pos, uint8_t buttonMask)
{
Point p(pos);
if (p.x < 0) p.x = 0;
if (p.y < 0) p.y = 0;
if (p.x >= server->width()) p.x = server->width() - 1;
if (p.y >= server->height()) p.y = server->height() - 1;
startMsg(msgTypePointerEvent);
os->writeU8(buttonMask);
os->writeU16(p.x);
os->writeU16(p.y);
endMsg();
}
void CMsgWriter::writeClientCutText(const char* str)
{
if (strchr(str, '\r') != nullptr)
throw Exception("Invalid carriage return in clipboard data");
std::string latin1(utf8ToLatin1(str));
startMsg(msgTypeClientCutText);
os->pad(3);
os->writeU32(latin1.size());
os->writeBytes((const uint8_t*)latin1.data(), latin1.size());
endMsg();
}
void CMsgWriter::writeClipboardCaps(uint32_t caps,
const uint32_t* lengths)
{
size_t i, count;
if (!(server->clipboardFlags() & clipboardCaps))
throw Exception("Server does not support clipboard \"caps\" action");
count = 0;
for (i = 0;i < 16;i++) {
if (caps & (1 << i))
count++;
}
startMsg(msgTypeClientCutText);
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 CMsgWriter::writeClipboardRequest(uint32_t flags)
{
if (!(server->clipboardFlags() & clipboardRequest))
throw Exception("Server does not support clipboard \"request\" action");
startMsg(msgTypeClientCutText);
os->pad(3);
os->writeS32(-4);
os->writeU32(flags | clipboardRequest);
endMsg();
}
void CMsgWriter::writeClipboardPeek(uint32_t flags)
{
if (!(server->clipboardFlags() & clipboardPeek))
throw Exception("Server does not support clipboard \"peek\" action");
startMsg(msgTypeClientCutText);
os->pad(3);
os->writeS32(-4);
os->writeU32(flags | clipboardPeek);
endMsg();
}
void CMsgWriter::writeClipboardNotify(uint32_t flags)
{
if (!(server->clipboardFlags() & clipboardNotify))
throw Exception("Server does not support clipboard \"notify\" action");
startMsg(msgTypeClientCutText);
os->pad(3);
os->writeS32(-4);
os->writeU32(flags | clipboardNotify);
endMsg();
}
void CMsgWriter::writeClipboardProvide(uint32_t flags,
const size_t* lengths,
const uint8_t* const* data)
{
rdr::MemOutStream mos;
rdr::ZlibOutStream zos;
int i, count;
if (!(server->clipboardFlags() & clipboardProvide))
throw Exception("Server 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(msgTypeClientCutText);
os->pad(3);
os->writeS32(-(4 + mos.length()));
os->writeU32(flags | clipboardProvide);
os->writeBytes(mos.data(), mos.length());
endMsg();
}
void CMsgWriter::startMsg(int type)
{
os->writeU8(type);
}
void CMsgWriter::endMsg()
{
os->flush();
}
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