barrier/lib/server/CClientProxy1_0.cpp

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/*
* synergy -- mouse and keyboard sharing utility
* Copyright (C) 2002 Chris Schoeneman
*
* This package is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* found in the file COPYING that should have accompanied this file.
*
* This package 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.
*/
#include "CClientProxy1_0.h"
#include "CProtocolUtil.h"
#include "XSynergy.h"
#include "IStream.h"
#include "CLog.h"
#include "IEventQueue.h"
#include "TMethodEventJob.h"
#include <cstring>
//
// CClientProxy1_0
//
CClientProxy1_0::CClientProxy1_0(const CString& name, IStream* stream) :
CClientProxy(name, stream),
m_heartbeatTimer(NULL),
m_parser(&CClientProxy1_0::parseHandshakeMessage)
{
// install event handlers
EVENTQUEUE->adoptHandler(IStream::getInputReadyEvent(),
stream->getEventTarget(),
new TMethodEventJob<CClientProxy1_0>(this,
&CClientProxy1_0::handleData, NULL));
EVENTQUEUE->adoptHandler(IStream::getOutputErrorEvent(),
stream->getEventTarget(),
new TMethodEventJob<CClientProxy1_0>(this,
&CClientProxy1_0::handleWriteError, NULL));
EVENTQUEUE->adoptHandler(IStream::getInputShutdownEvent(),
stream->getEventTarget(),
new TMethodEventJob<CClientProxy1_0>(this,
&CClientProxy1_0::handleDisconnect, NULL));
EVENTQUEUE->adoptHandler(IStream::getOutputShutdownEvent(),
stream->getEventTarget(),
new TMethodEventJob<CClientProxy1_0>(this,
&CClientProxy1_0::handleWriteError, NULL));
EVENTQUEUE->adoptHandler(CEvent::kTimer, this,
new TMethodEventJob<CClientProxy1_0>(this,
&CClientProxy1_0::handleFlatline, NULL));
setHeartbeatRate(kHeartRate, kHeartRate * kHeartBeatsUntilDeath);
LOG((CLOG_DEBUG1 "querying client \"%s\" info", getName().c_str()));
CProtocolUtil::writef(getStream(), kMsgQInfo);
}
CClientProxy1_0::~CClientProxy1_0()
{
removeHandlers();
}
void
CClientProxy1_0::disconnect()
{
removeHandlers();
getStream()->close();
EVENTQUEUE->addEvent(CEvent(getDisconnectedEvent(), getEventTarget()));
}
void
CClientProxy1_0::removeHandlers()
{
// uninstall event handlers
EVENTQUEUE->removeHandler(IStream::getInputReadyEvent(),
getStream()->getEventTarget());
EVENTQUEUE->removeHandler(IStream::getOutputErrorEvent(),
getStream()->getEventTarget());
EVENTQUEUE->removeHandler(IStream::getInputShutdownEvent(),
getStream()->getEventTarget());
EVENTQUEUE->removeHandler(IStream::getOutputShutdownEvent(),
getStream()->getEventTarget());
EVENTQUEUE->removeHandler(CEvent::kTimer, this);
// remove timer
removeHeartbeatTimer();
}
void
CClientProxy1_0::addHeartbeatTimer()
{
if (m_heartbeatAlarm > 0.0) {
m_heartbeatTimer = EVENTQUEUE->newOneShotTimer(m_heartbeatAlarm, this);
}
}
void
CClientProxy1_0::removeHeartbeatTimer()
{
if (m_heartbeatTimer != NULL) {
EVENTQUEUE->deleteTimer(m_heartbeatTimer);
m_heartbeatTimer = NULL;
}
}
void
CClientProxy1_0::resetHeartbeatTimer()
{
// reset the alarm
removeHeartbeatTimer();
addHeartbeatTimer();
}
void
CClientProxy1_0::resetHeartbeatRate()
{
setHeartbeatRate(kHeartRate, kHeartRate * kHeartBeatsUntilDeath);
}
void
CClientProxy1_0::setHeartbeatRate(double, double alarm)
{
m_heartbeatAlarm = alarm;
}
void
CClientProxy1_0::handleData(const CEvent&, void*)
{
// handle messages until there are no more. first read message code.
UInt8 code[4];
UInt32 n = getStream()->read(code, 4);
while (n != 0) {
// verify we got an entire code
if (n != 4) {
LOG((CLOG_ERR "incomplete message from \"%s\": %d bytes", getName().c_str(), n));
disconnect();
return;
}
// parse message
LOG((CLOG_DEBUG2 "msg from \"%s\": %c%c%c%c", getName().c_str(), code[0], code[1], code[2], code[3]));
if (!(this->*m_parser)(code)) {
LOG((CLOG_ERR "invalid message from client \"%s\": %c%c%c%c", getName().c_str(), code[0], code[1], code[2], code[3]));
disconnect();
return;
}
// next message
n = getStream()->read(code, 4);
}
// restart heartbeat timer
resetHeartbeatTimer();
}
bool
CClientProxy1_0::parseHandshakeMessage(const UInt8* code)
{
if (memcmp(code, kMsgCNoop, 4) == 0) {
// discard no-ops
LOG((CLOG_DEBUG2 "no-op from", getName().c_str()));
return true;
}
else if (memcmp(code, kMsgDInfo, 4) == 0) {
// future messages get parsed by parseMessage
m_parser = &CClientProxy1_0::parseMessage;
if (recvInfo()) {
EVENTQUEUE->addEvent(CEvent(getReadyEvent(), getEventTarget()));
addHeartbeatTimer();
return true;
}
}
return false;
}
bool
CClientProxy1_0::parseMessage(const UInt8* code)
{
if (memcmp(code, kMsgDInfo, 4) == 0) {
if (recvInfo()) {
EVENTQUEUE->addEvent(
CEvent(getShapeChangedEvent(), getEventTarget()));
return true;
}
return false;
}
else if (memcmp(code, kMsgCNoop, 4) == 0) {
// discard no-ops
LOG((CLOG_DEBUG2 "no-op from", getName().c_str()));
return true;
}
else if (memcmp(code, kMsgCClipboard, 4) == 0) {
return recvGrabClipboard();
}
else if (memcmp(code, kMsgDClipboard, 4) == 0) {
return recvClipboard();
}
return false;
}
void
CClientProxy1_0::handleDisconnect(const CEvent&, void*)
{
LOG((CLOG_NOTE "client \"%s\" has disconnected", getName().c_str()));
disconnect();
}
void
CClientProxy1_0::handleWriteError(const CEvent&, void*)
{
LOG((CLOG_WARN "error writing to client \"%s\"", getName().c_str()));
disconnect();
}
void
CClientProxy1_0::handleFlatline(const CEvent&, void*)
{
// didn't get a heartbeat fast enough. assume client is dead.
LOG((CLOG_NOTE "client \"%s\" is dead", getName().c_str()));
disconnect();
}
bool
CClientProxy1_0::getClipboard(ClipboardID id, IClipboard* clipboard) const
{
CClipboard::copy(clipboard, &m_clipboard[id].m_clipboard);
return true;
}
void
CClientProxy1_0::getShape(SInt32& x, SInt32& y, SInt32& w, SInt32& h) const
{
x = m_info.m_x;
y = m_info.m_y;
w = m_info.m_w;
h = m_info.m_h;
}
void
CClientProxy1_0::getCursorPos(SInt32& x, SInt32& y) const
{
// note -- this returns the cursor pos from when we last got client info
x = m_info.m_mx;
y = m_info.m_my;
}
void
CClientProxy1_0::enter(SInt32 xAbs, SInt32 yAbs,
UInt32 seqNum, KeyModifierMask mask, bool)
{
LOG((CLOG_DEBUG1 "send enter to \"%s\", %d,%d %d %04x", getName().c_str(), xAbs, yAbs, seqNum, mask));
CProtocolUtil::writef(getStream(), kMsgCEnter,
xAbs, yAbs, seqNum, mask);
}
bool
CClientProxy1_0::leave()
{
LOG((CLOG_DEBUG1 "send leave to \"%s\"", getName().c_str()));
CProtocolUtil::writef(getStream(), kMsgCLeave);
// we can never prevent the user from leaving
return true;
}
void
CClientProxy1_0::setClipboard(ClipboardID id, const IClipboard* clipboard)
{
// ignore if this clipboard is already clean
if (m_clipboard[id].m_dirty) {
// this clipboard is now clean
m_clipboard[id].m_dirty = false;
CClipboard::copy(&m_clipboard[id].m_clipboard, clipboard);
CString data = m_clipboard[id].m_clipboard.marshall();
LOG((CLOG_DEBUG "send clipboard %d to \"%s\" size=%d", id, getName().c_str(), data.size()));
CProtocolUtil::writef(getStream(), kMsgDClipboard, id, 0, &data);
}
}
void
CClientProxy1_0::grabClipboard(ClipboardID id)
{
LOG((CLOG_DEBUG "send grab clipboard %d to \"%s\"", id, getName().c_str()));
CProtocolUtil::writef(getStream(), kMsgCClipboard, id, 0);
// this clipboard is now dirty
m_clipboard[id].m_dirty = true;
}
void
CClientProxy1_0::setClipboardDirty(ClipboardID id, bool dirty)
{
m_clipboard[id].m_dirty = dirty;
}
void
CClientProxy1_0::keyDown(KeyID key, KeyModifierMask mask, KeyButton)
{
LOG((CLOG_DEBUG1 "send key down to \"%s\" id=%d, mask=0x%04x", getName().c_str(), key, mask));
CProtocolUtil::writef(getStream(), kMsgDKeyDown1_0, key, mask);
}
void
CClientProxy1_0::keyRepeat(KeyID key, KeyModifierMask mask,
SInt32 count, KeyButton)
{
LOG((CLOG_DEBUG1 "send key repeat to \"%s\" id=%d, mask=0x%04x, count=%d", getName().c_str(), key, mask, count));
CProtocolUtil::writef(getStream(), kMsgDKeyRepeat1_0, key, mask, count);
}
void
CClientProxy1_0::keyUp(KeyID key, KeyModifierMask mask, KeyButton)
{
LOG((CLOG_DEBUG1 "send key up to \"%s\" id=%d, mask=0x%04x", getName().c_str(), key, mask));
CProtocolUtil::writef(getStream(), kMsgDKeyUp1_0, key, mask);
}
void
CClientProxy1_0::mouseDown(ButtonID button)
{
LOG((CLOG_DEBUG1 "send mouse down to \"%s\" id=%d", getName().c_str(), button));
CProtocolUtil::writef(getStream(), kMsgDMouseDown, button);
}
void
CClientProxy1_0::mouseUp(ButtonID button)
{
LOG((CLOG_DEBUG1 "send mouse up to \"%s\" id=%d", getName().c_str(), button));
CProtocolUtil::writef(getStream(), kMsgDMouseUp, button);
}
void
CClientProxy1_0::mouseMove(SInt32 xAbs, SInt32 yAbs)
{
LOG((CLOG_DEBUG2 "send mouse move to \"%s\" %d,%d", getName().c_str(), xAbs, yAbs));
CProtocolUtil::writef(getStream(), kMsgDMouseMove, xAbs, yAbs);
}
void
CClientProxy1_0::mouseRelativeMove(SInt32, SInt32)
{
// ignore -- not supported in protocol 1.0
}
void
CClientProxy1_0::mouseWheel(SInt32, SInt32 yDelta)
{
// clients prior to 1.3 only support the y axis
LOG((CLOG_DEBUG2 "send mouse wheel to \"%s\" %+d", getName().c_str(), yDelta));
CProtocolUtil::writef(getStream(), kMsgDMouseWheel1_0, yDelta);
}
void
CClientProxy1_0::screensaver(bool on)
{
LOG((CLOG_DEBUG1 "send screen saver to \"%s\" on=%d", getName().c_str(), on ? 1 : 0));
CProtocolUtil::writef(getStream(), kMsgCScreenSaver, on ? 1 : 0);
}
void
CClientProxy1_0::resetOptions()
{
LOG((CLOG_DEBUG1 "send reset options to \"%s\"", getName().c_str()));
CProtocolUtil::writef(getStream(), kMsgCResetOptions);
// reset heart rate and death
resetHeartbeatRate();
removeHeartbeatTimer();
addHeartbeatTimer();
}
void
CClientProxy1_0::setOptions(const COptionsList& options)
{
LOG((CLOG_DEBUG1 "send set options to \"%s\" size=%d", getName().c_str(), options.size()));
CProtocolUtil::writef(getStream(), kMsgDSetOptions, &options);
// check options
2009-10-21 16:25:08 +00:00
for (UInt32 i = 0, n = (UInt32)options.size(); i < n; i += 2) {
if (options[i] == kOptionHeartbeat) {
double rate = 1.0e-3 * static_cast<double>(options[i + 1]);
if (rate <= 0.0) {
rate = -1.0;
}
setHeartbeatRate(rate, rate * kHeartBeatsUntilDeath);
removeHeartbeatTimer();
addHeartbeatTimer();
}
}
}
bool
CClientProxy1_0::recvInfo()
{
// parse the message
SInt16 x, y, w, h, dummy1, mx, my;
if (!CProtocolUtil::readf(getStream(), kMsgDInfo + 4,
&x, &y, &w, &h, &dummy1, &mx, &my)) {
return false;
}
LOG((CLOG_DEBUG "received client \"%s\" info shape=%d,%d %dx%d at %d,%d", getName().c_str(), x, y, w, h, mx, my));
// validate
if (w <= 0 || h <= 0) {
return false;
}
if (mx < x || mx >= x + w || my < y || my >= y + h) {
mx = x + w / 2;
my = y + h / 2;
}
// save
m_info.m_x = x;
m_info.m_y = y;
m_info.m_w = w;
m_info.m_h = h;
m_info.m_mx = mx;
m_info.m_my = my;
// acknowledge receipt
LOG((CLOG_DEBUG1 "send info ack to \"%s\"", getName().c_str()));
CProtocolUtil::writef(getStream(), kMsgCInfoAck);
return true;
}
bool
CClientProxy1_0::recvClipboard()
{
// parse message
ClipboardID id;
UInt32 seqNum;
CString data;
if (!CProtocolUtil::readf(getStream(),
kMsgDClipboard + 4, &id, &seqNum, &data)) {
return false;
}
LOG((CLOG_DEBUG "received client \"%s\" clipboard %d seqnum=%d, size=%d", getName().c_str(), id, seqNum, data.size()));
// validate
if (id >= kClipboardEnd) {
return false;
}
// save clipboard
m_clipboard[id].m_clipboard.unmarshall(data, 0);
m_clipboard[id].m_sequenceNumber = seqNum;
// notify
CClipboardInfo* info = new CClipboardInfo;
info->m_id = id;
info->m_sequenceNumber = seqNum;
EVENTQUEUE->addEvent(CEvent(getClipboardChangedEvent(),
getEventTarget(), info));
return true;
}
bool
CClientProxy1_0::recvGrabClipboard()
{
// parse message
ClipboardID id;
UInt32 seqNum;
if (!CProtocolUtil::readf(getStream(), kMsgCClipboard + 4, &id, &seqNum)) {
return false;
}
LOG((CLOG_DEBUG "received client \"%s\" grabbed clipboard %d seqnum=%d", getName().c_str(), id, seqNum));
// validate
if (id >= kClipboardEnd) {
return false;
}
// notify
CClipboardInfo* info = new CClipboardInfo;
info->m_id = id;
info->m_sequenceNumber = seqNum;
EVENTQUEUE->addEvent(CEvent(getClipboardGrabbedEvent(),
getEventTarget(), info));
return true;
}
//
// CClientProxy1_0::CClientClipboard
//
CClientProxy1_0::CClientClipboard::CClientClipboard() :
m_clipboard(),
m_sequenceNumber(0),
m_dirty(true)
{
// do nothing
}