barrier/lib/server/CClientProxyUnknown.cpp

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/*
* synergy -- mouse and keyboard sharing utility
* Copyright (C) 2004 Chris Schoeneman, Nick Bolton, Sorin Sbarnea
*
* 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.
2010-06-20 17:38:51 +00:00
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "CClientProxyUnknown.h"
#include "CClientProxy1_0.h"
#include "CClientProxy1_1.h"
#include "CClientProxy1_2.h"
#include "CClientProxy1_3.h"
#include "ProtocolTypes.h"
#include "CProtocolUtil.h"
#include "XSynergy.h"
#include "IStream.h"
#include "XIO.h"
#include "CLog.h"
#include "CString.h"
#include "IEventQueue.h"
#include "TMethodEventJob.h"
//
// CClientProxyUnknown
//
CEvent::Type CClientProxyUnknown::s_successEvent = CEvent::kUnknown;
CEvent::Type CClientProxyUnknown::s_failureEvent = CEvent::kUnknown;
CClientProxyUnknown::CClientProxyUnknown(IStream* stream, double timeout) :
m_stream(stream),
m_proxy(NULL),
m_ready(false)
{
EVENTQUEUE->adoptHandler(CEvent::kTimer, this,
new TMethodEventJob<CClientProxyUnknown>(this,
&CClientProxyUnknown::handleTimeout, NULL));
m_timer = EVENTQUEUE->newOneShotTimer(timeout, this);
addStreamHandlers();
LOG((CLOG_DEBUG1 "saying hello"));
CProtocolUtil::writef(m_stream, kMsgHello,
kProtocolMajorVersion,
kProtocolMinorVersion);
}
CClientProxyUnknown::~CClientProxyUnknown()
{
removeHandlers();
removeTimer();
delete m_stream;
delete m_proxy;
}
CClientProxy*
CClientProxyUnknown::orphanClientProxy()
{
if (m_ready) {
removeHandlers();
CClientProxy* proxy = m_proxy;
m_proxy = NULL;
return proxy;
}
else {
return NULL;
}
}
CEvent::Type
CClientProxyUnknown::getSuccessEvent()
{
return CEvent::registerTypeOnce(s_successEvent,
"CClientProxy::success");
}
CEvent::Type
CClientProxyUnknown::getFailureEvent()
{
return CEvent::registerTypeOnce(s_failureEvent,
"CClientProxy::failure");
}
void
CClientProxyUnknown::sendSuccess()
{
m_ready = true;
removeTimer();
EVENTQUEUE->addEvent(CEvent(getSuccessEvent(), this));
}
void
CClientProxyUnknown::sendFailure()
{
delete m_proxy;
m_proxy = NULL;
m_ready = false;
removeHandlers();
removeTimer();
EVENTQUEUE->addEvent(CEvent(getFailureEvent(), this));
}
void
CClientProxyUnknown::addStreamHandlers()
{
assert(m_stream != NULL);
EVENTQUEUE->adoptHandler(IStream::getInputReadyEvent(),
m_stream->getEventTarget(),
new TMethodEventJob<CClientProxyUnknown>(this,
&CClientProxyUnknown::handleData));
EVENTQUEUE->adoptHandler(IStream::getOutputErrorEvent(),
m_stream->getEventTarget(),
new TMethodEventJob<CClientProxyUnknown>(this,
&CClientProxyUnknown::handleWriteError));
EVENTQUEUE->adoptHandler(IStream::getInputShutdownEvent(),
m_stream->getEventTarget(),
new TMethodEventJob<CClientProxyUnknown>(this,
&CClientProxyUnknown::handleDisconnect));
EVENTQUEUE->adoptHandler(IStream::getOutputShutdownEvent(),
m_stream->getEventTarget(),
new TMethodEventJob<CClientProxyUnknown>(this,
&CClientProxyUnknown::handleWriteError));
}
void
CClientProxyUnknown::addProxyHandlers()
{
assert(m_proxy != NULL);
EVENTQUEUE->adoptHandler(CClientProxy::getReadyEvent(),
m_proxy,
new TMethodEventJob<CClientProxyUnknown>(this,
&CClientProxyUnknown::handleReady));
EVENTQUEUE->adoptHandler(CClientProxy::getDisconnectedEvent(),
m_proxy,
new TMethodEventJob<CClientProxyUnknown>(this,
&CClientProxyUnknown::handleDisconnect));
}
void
CClientProxyUnknown::removeHandlers()
{
if (m_stream != NULL) {
EVENTQUEUE->removeHandler(IStream::getInputReadyEvent(),
m_stream->getEventTarget());
EVENTQUEUE->removeHandler(IStream::getOutputErrorEvent(),
m_stream->getEventTarget());
EVENTQUEUE->removeHandler(IStream::getInputShutdownEvent(),
m_stream->getEventTarget());
EVENTQUEUE->removeHandler(IStream::getOutputShutdownEvent(),
m_stream->getEventTarget());
}
if (m_proxy != NULL) {
EVENTQUEUE->removeHandler(CClientProxy::getReadyEvent(),
m_proxy);
EVENTQUEUE->removeHandler(CClientProxy::getDisconnectedEvent(),
m_proxy);
}
}
void
CClientProxyUnknown::removeTimer()
{
if (m_timer != NULL) {
EVENTQUEUE->deleteTimer(m_timer);
EVENTQUEUE->removeHandler(CEvent::kTimer, this);
m_timer = NULL;
}
}
void
CClientProxyUnknown::handleData(const CEvent&, void*)
{
LOG((CLOG_DEBUG1 "parsing hello reply"));
CString name("<unknown>");
try {
// limit the maximum length of the hello
UInt32 n = m_stream->getSize();
if (n > kMaxHelloLength) {
LOG((CLOG_DEBUG1 "hello reply too long"));
throw XBadClient();
}
// parse the reply to hello
SInt16 major, minor;
if (!CProtocolUtil::readf(m_stream, kMsgHelloBack,
&major, &minor, &name)) {
throw XBadClient();
}
// disallow invalid version numbers
if (major <= 0 || minor < 0) {
throw XIncompatibleClient(major, minor);
}
// remove stream event handlers. the proxy we're about to create
// may install its own handlers and we don't want to accidentally
// remove those later.
removeHandlers();
// create client proxy for highest version supported by the client
if (major == 1) {
switch (minor) {
case 0:
m_proxy = new CClientProxy1_0(name, m_stream);
break;
case 1:
m_proxy = new CClientProxy1_1(name, m_stream);
break;
case 2:
m_proxy = new CClientProxy1_2(name, m_stream);
break;
case 3:
m_proxy = new CClientProxy1_3(name, m_stream);
break;
}
}
// hangup (with error) if version isn't supported
if (m_proxy == NULL) {
throw XIncompatibleClient(major, minor);
}
// the proxy is created and now proxy now owns the stream
LOG((CLOG_DEBUG1 "created proxy for client \"%s\" version %d.%d", name.c_str(), major, minor));
m_stream = NULL;
// wait until the proxy signals that it's ready or has disconnected
addProxyHandlers();
return;
}
catch (XIncompatibleClient& e) {
// client is incompatible
LOG((CLOG_WARN "client \"%s\" has incompatible version %d.%d)", name.c_str(), e.getMajor(), e.getMinor()));
CProtocolUtil::writef(m_stream,
kMsgEIncompatible,
kProtocolMajorVersion, kProtocolMinorVersion);
}
catch (XBadClient&) {
// client not behaving
LOG((CLOG_WARN "protocol error from client \"%s\"", name.c_str()));
CProtocolUtil::writef(m_stream, kMsgEBad);
}
catch (XBase& e) {
// misc error
LOG((CLOG_WARN "error communicating with client \"%s\": %s", name.c_str(), e.what()));
}
sendFailure();
}
void
CClientProxyUnknown::handleWriteError(const CEvent&, void*)
{
LOG((CLOG_NOTE "error communicating with new client"));
sendFailure();
}
void
CClientProxyUnknown::handleTimeout(const CEvent&, void*)
{
LOG((CLOG_NOTE "new client is unresponsive"));
sendFailure();
}
void
CClientProxyUnknown::handleDisconnect(const CEvent&, void*)
{
LOG((CLOG_NOTE "new client disconnected"));
sendFailure();
}
void
CClientProxyUnknown::handleReady(const CEvent&, void*)
{
sendSuccess();
}