296 lines
7.6 KiB
C++
296 lines
7.6 KiB
C++
/*
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* synergy -- mouse and keyboard sharing utility
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* Copyright (C) 2012 Synergy Si Ltd.
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* Copyright (C) 2004 Chris Schoeneman
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*
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* This package is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* found in the file LICENSE that should have accompanied this file.
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*
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* This package is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "server/ClientProxyUnknown.h"
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#include "server/Server.h"
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#include "server/ClientProxy1_0.h"
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#include "server/ClientProxy1_1.h"
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#include "server/ClientProxy1_2.h"
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#include "server/ClientProxy1_3.h"
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#include "server/ClientProxy1_4.h"
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#include "server/ClientProxy1_5.h"
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#include "server/ClientProxy1_6.h"
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#include "synergy/protocol_types.h"
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#include "synergy/ProtocolUtil.h"
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#include "synergy/XSynergy.h"
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#include "io/IStream.h"
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#include "io/XIO.h"
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#include "base/Log.h"
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#include "base/String.h"
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#include "base/IEventQueue.h"
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#include "base/TMethodEventJob.h"
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//
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// ClientProxyUnknown
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//
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ClientProxyUnknown::ClientProxyUnknown(synergy::IStream* stream, double timeout, Server* server, IEventQueue* events) :
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m_stream(stream),
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m_proxy(NULL),
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m_ready(false),
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m_server(server),
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m_events(events)
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{
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assert(m_server != NULL);
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m_events->adoptHandler(Event::kTimer, this,
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new TMethodEventJob<ClientProxyUnknown>(this,
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&ClientProxyUnknown::handleTimeout, NULL));
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m_timer = m_events->newOneShotTimer(timeout, this);
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addStreamHandlers();
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LOG((CLOG_DEBUG1 "saying hello"));
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ProtocolUtil::writef(m_stream, kMsgHello,
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kProtocolMajorVersion,
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kProtocolMinorVersion);
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}
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ClientProxyUnknown::~ClientProxyUnknown()
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{
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removeHandlers();
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removeTimer();
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delete m_stream;
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delete m_proxy;
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}
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ClientProxy*
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ClientProxyUnknown::orphanClientProxy()
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{
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if (m_ready) {
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removeHandlers();
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ClientProxy* proxy = m_proxy;
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m_proxy = NULL;
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return proxy;
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}
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else {
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return NULL;
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}
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}
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void
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ClientProxyUnknown::sendSuccess()
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{
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m_ready = true;
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removeTimer();
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m_events->addEvent(Event(m_events->forClientProxyUnknown().success(), this));
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}
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void
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ClientProxyUnknown::sendFailure()
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{
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delete m_proxy;
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m_proxy = NULL;
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m_ready = false;
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removeHandlers();
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removeTimer();
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m_events->addEvent(Event(m_events->forClientProxyUnknown().failure(), this));
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}
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void
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ClientProxyUnknown::addStreamHandlers()
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{
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assert(m_stream != NULL);
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m_events->adoptHandler(m_events->forIStream().inputReady(),
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m_stream->getEventTarget(),
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new TMethodEventJob<ClientProxyUnknown>(this,
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&ClientProxyUnknown::handleData));
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m_events->adoptHandler(m_events->forIStream().outputError(),
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m_stream->getEventTarget(),
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new TMethodEventJob<ClientProxyUnknown>(this,
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&ClientProxyUnknown::handleWriteError));
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m_events->adoptHandler(m_events->forIStream().inputShutdown(),
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m_stream->getEventTarget(),
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new TMethodEventJob<ClientProxyUnknown>(this,
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&ClientProxyUnknown::handleDisconnect));
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m_events->adoptHandler(m_events->forIStream().outputShutdown(),
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m_stream->getEventTarget(),
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new TMethodEventJob<ClientProxyUnknown>(this,
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&ClientProxyUnknown::handleWriteError));
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}
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void
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ClientProxyUnknown::addProxyHandlers()
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{
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assert(m_proxy != NULL);
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m_events->adoptHandler(m_events->forClientProxy().ready(),
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m_proxy,
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new TMethodEventJob<ClientProxyUnknown>(this,
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&ClientProxyUnknown::handleReady));
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m_events->adoptHandler(m_events->forClientProxy().disconnected(),
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m_proxy,
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new TMethodEventJob<ClientProxyUnknown>(this,
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&ClientProxyUnknown::handleDisconnect));
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}
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void
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ClientProxyUnknown::removeHandlers()
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{
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if (m_stream != NULL) {
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m_events->removeHandler(m_events->forIStream().inputReady(),
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m_stream->getEventTarget());
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m_events->removeHandler(m_events->forIStream().outputError(),
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m_stream->getEventTarget());
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m_events->removeHandler(m_events->forIStream().inputShutdown(),
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m_stream->getEventTarget());
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m_events->removeHandler(m_events->forIStream().outputShutdown(),
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m_stream->getEventTarget());
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}
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if (m_proxy != NULL) {
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m_events->removeHandler(m_events->forClientProxy().ready(),
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m_proxy);
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m_events->removeHandler(m_events->forClientProxy().disconnected(),
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m_proxy);
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}
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}
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void
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ClientProxyUnknown::removeTimer()
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{
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if (m_timer != NULL) {
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m_events->deleteTimer(m_timer);
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m_events->removeHandler(Event::kTimer, this);
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m_timer = NULL;
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}
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}
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void
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ClientProxyUnknown::handleData(const Event&, void*)
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{
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LOG((CLOG_DEBUG1 "parsing hello reply"));
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String name("<unknown>");
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try {
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// limit the maximum length of the hello
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UInt32 n = m_stream->getSize();
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if (n > kMaxHelloLength) {
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LOG((CLOG_DEBUG1 "hello reply too long"));
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throw XBadClient();
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}
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// parse the reply to hello
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SInt16 major, minor;
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if (!ProtocolUtil::readf(m_stream, kMsgHelloBack,
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&major, &minor, &name)) {
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throw XBadClient();
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}
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// disallow invalid version numbers
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if (major <= 0 || minor < 0) {
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throw XIncompatibleClient(major, minor);
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}
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// remove stream event handlers. the proxy we're about to create
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// may install its own handlers and we don't want to accidentally
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// remove those later.
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removeHandlers();
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// create client proxy for highest version supported by the client
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if (major == 1) {
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switch (minor) {
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case 0:
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m_proxy = new ClientProxy1_0(name, m_stream, m_events);
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break;
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case 1:
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m_proxy = new ClientProxy1_1(name, m_stream, m_events);
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break;
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case 2:
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m_proxy = new ClientProxy1_2(name, m_stream, m_events);
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break;
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case 3:
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m_proxy = new ClientProxy1_3(name, m_stream, m_events);
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break;
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case 4:
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m_proxy = new ClientProxy1_4(name, m_stream, m_server, m_events);
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break;
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case 5:
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m_proxy = new ClientProxy1_5(name, m_stream, m_server, m_events);
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break;
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case 6:
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m_proxy = new ClientProxy1_6(name, m_stream, m_server, m_events);
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break;
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}
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}
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// hangup (with error) if version isn't supported
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if (m_proxy == NULL) {
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throw XIncompatibleClient(major, minor);
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}
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// the proxy is created and now proxy now owns the stream
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LOG((CLOG_DEBUG1 "created proxy for client \"%s\" version %d.%d", name.c_str(), major, minor));
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m_stream = NULL;
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// wait until the proxy signals that it's ready or has disconnected
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addProxyHandlers();
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return;
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}
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catch (XIncompatibleClient& e) {
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// client is incompatible
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LOG((CLOG_WARN "client \"%s\" has incompatible version %d.%d)", name.c_str(), e.getMajor(), e.getMinor()));
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ProtocolUtil::writef(m_stream,
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kMsgEIncompatible,
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kProtocolMajorVersion, kProtocolMinorVersion);
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}
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catch (XBadClient&) {
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// client not behaving
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LOG((CLOG_WARN "protocol error from client \"%s\"", name.c_str()));
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ProtocolUtil::writef(m_stream, kMsgEBad);
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}
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catch (XBase& e) {
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// misc error
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LOG((CLOG_WARN "error communicating with client \"%s\": %s", name.c_str(), e.what()));
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}
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sendFailure();
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}
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void
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ClientProxyUnknown::handleWriteError(const Event&, void*)
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{
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LOG((CLOG_NOTE "error communicating with new client"));
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sendFailure();
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}
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void
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ClientProxyUnknown::handleTimeout(const Event&, void*)
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{
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LOG((CLOG_NOTE "new client is unresponsive"));
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sendFailure();
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}
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void
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ClientProxyUnknown::handleDisconnect(const Event&, void*)
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{
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LOG((CLOG_NOTE "new client disconnected"));
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sendFailure();
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}
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void
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ClientProxyUnknown::handleReady(const Event&, void*)
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{
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sendSuccess();
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}
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