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/*
* synergy -- mouse and keyboard sharing utility
* Copyright (C) 2004 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 "CClientListener.h"
#include "CClientProxy.h"
#include "CClientProxyUnknown.h"
#include "CPacketStreamFilter.h"
#include "IStreamFilterFactory.h"
#include "IDataSocket.h"
#include "IListenSocket.h"
#include "ISocketFactory.h"
#include "XSocket.h"
#include "CLog.h"
#include "IEventQueue.h"
#include "TMethodEventJob.h"
//
// CClientListener
//
CEvent::Type CClientListener::s_connectedEvent = CEvent::kUnknown;
CClientListener::CClientListener(const CNetworkAddress& address,
ISocketFactory* socketFactory,
IStreamFilterFactory* streamFilterFactory) :
m_socketFactory(socketFactory),
m_streamFilterFactory(streamFilterFactory)
{
assert(m_socketFactory != NULL);
try {
// create listen socket
m_listen = m_socketFactory->createListen();
// bind listen address
LOG((CLOG_DEBUG1 "binding listen socket"));
m_listen->bind(address);
}
catch (XSocketAddressInUse&) {
delete m_listen;
delete m_socketFactory;
delete m_streamFilterFactory;
throw;
}
catch (XBase&) {
delete m_listen;
delete m_socketFactory;
delete m_streamFilterFactory;
throw;
}
LOG((CLOG_DEBUG1 "listening for clients"));
// setup event handler
EVENTQUEUE->adoptHandler(IListenSocket::getConnectingEvent(), m_listen,
new TMethodEventJob<CClientListener>(this,
&CClientListener::handleClientConnecting));
}
CClientListener::~CClientListener()
{
LOG((CLOG_DEBUG1 "stop listening for clients"));
// discard already connected clients
for (CNewClients::iterator index = m_newClients.begin();
index != m_newClients.end(); ++index) {
CClientProxyUnknown* client = *index;
EVENTQUEUE->removeHandler(
CClientProxyUnknown::getSuccessEvent(), client);
EVENTQUEUE->removeHandler(
CClientProxyUnknown::getFailureEvent(), client);
EVENTQUEUE->removeHandler(
CClientProxy::getDisconnectedEvent(), client);
delete client;
}
// discard waiting clients
CClientProxy* client = getNextClient();
while (client != NULL) {
delete client;
client = getNextClient();
}
EVENTQUEUE->removeHandler(IListenSocket::getConnectingEvent(), m_listen);
delete m_listen;
delete m_socketFactory;
delete m_streamFilterFactory;
}
CClientProxy*
CClientListener::getNextClient()
{
CClientProxy* client = NULL;
if (!m_waitingClients.empty()) {
client = m_waitingClients.front();
m_waitingClients.pop_front();
EVENTQUEUE->removeHandler(CClientProxy::getDisconnectedEvent(), client);
}
return client;
}
CEvent::Type
CClientListener::getConnectedEvent()
{
return CEvent::registerTypeOnce(s_connectedEvent,
"CClientListener::connected");
}
void
CClientListener::handleClientConnecting(const CEvent&, void*)
{
// accept client connection
IStream* stream = m_listen->accept();
if (stream == NULL) {
return;
}
LOG((CLOG_NOTE "accepted client connection"));
// filter socket messages, including a packetizing filter
if (m_streamFilterFactory != NULL) {
stream = m_streamFilterFactory->create(stream, true);
}
stream = new CPacketStreamFilter(stream, true);
// create proxy for unknown client
CClientProxyUnknown* client = new CClientProxyUnknown(stream, 30.0);
m_newClients.insert(client);
// watch for events from unknown client
EVENTQUEUE->adoptHandler(CClientProxyUnknown::getSuccessEvent(), client,
new TMethodEventJob<CClientListener>(this,
&CClientListener::handleUnknownClient, client));
EVENTQUEUE->adoptHandler(CClientProxyUnknown::getFailureEvent(), client,
new TMethodEventJob<CClientListener>(this,
&CClientListener::handleUnknownClient, client));
}
void
CClientListener::handleUnknownClient(const CEvent&, void* vclient)
{
CClientProxyUnknown* unknownClient =
reinterpret_cast<CClientProxyUnknown*>(vclient);
// we should have the client in our new client list
assert(m_newClients.count(unknownClient) == 1);
// get the real client proxy and install it
CClientProxy* client = unknownClient->orphanClientProxy();
if (client != NULL) {
// handshake was successful
m_waitingClients.push_back(client);
EVENTQUEUE->addEvent(CEvent(getConnectedEvent(), this));
// watch for client to disconnect while it's in our queue
EVENTQUEUE->adoptHandler(CClientProxy::getDisconnectedEvent(), client,
new TMethodEventJob<CClientListener>(this,
&CClientListener::handleClientDisconnected,
client));
}
// now finished with unknown client
EVENTQUEUE->removeHandler(CClientProxyUnknown::getSuccessEvent(), client);
EVENTQUEUE->removeHandler(CClientProxyUnknown::getFailureEvent(), client);
m_newClients.erase(unknownClient);
delete unknownClient;
}
void
CClientListener::handleClientDisconnected(const CEvent&, void* vclient)
{
CClientProxy* client = reinterpret_cast<CClientProxy*>(vclient);
// find client in waiting clients queue
for (CWaitingClients::iterator i = m_waitingClients.begin(),
n = m_waitingClients.end(); i != n; ++i) {
if (*i == client) {
m_waitingClients.erase(i);
EVENTQUEUE->removeHandler(CClientProxy::getDisconnectedEvent(),
client);
delete client;
break;
}
}
}
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