869 lines
19 KiB
C++
869 lines
19 KiB
C++
/*
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* synergy -- mouse and keyboard sharing utility
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* Copyright (C) 2002 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 COPYING 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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#include "CClient.h"
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#include "CScreen.h"
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#include "ProtocolTypes.h"
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#include "Version.h"
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#include "XScreen.h"
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#include "CNetworkAddress.h"
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#include "CSocketMultiplexer.h"
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#include "CTCPSocketFactory.h"
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#include "XSocket.h"
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#include "CThread.h"
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#include "CEventQueue.h"
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#include "CFunctionEventJob.h"
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#include "CFunctionJob.h"
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#include "CLog.h"
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#include "CString.h"
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#include "CStringUtil.h"
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#include "LogOutputters.h"
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#include "CArch.h"
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#include "XArch.h"
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#include <cstring>
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#define DAEMON_RUNNING(running_)
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#if WINAPI_MSWINDOWS
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#include "CArchMiscWindows.h"
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#include "CMSWindowsScreen.h"
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#include "CMSWindowsUtil.h"
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#include "CMSWindowsClientTaskBarReceiver.h"
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#include "resource.h"
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#undef DAEMON_RUNNING
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#define DAEMON_RUNNING(running_) CArchMiscWindows::daemonRunning(running_)
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#elif WINAPI_XWINDOWS
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#include "CXWindowsScreen.h"
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#include "CXWindowsClientTaskBarReceiver.h"
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#elif WINAPI_CARBON
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#include "COSXScreen.h"
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#include "COSXClientTaskBarReceiver.h"
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#endif
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// platform dependent name of a daemon
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#if SYSAPI_WIN32
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#define DAEMON_NAME "Synergy Client"
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#elif SYSAPI_UNIX
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#define DAEMON_NAME "synergyc"
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#endif
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typedef int (*StartupFunc)(int, char**);
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static bool startClient();
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static void parse(int argc, const char* const* argv);
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#if WINAPI_MSWINDOWS
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static void handleSystemSuspend(void*);
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static void handleSystemResume(void*);
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#endif
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//
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// program arguments
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//
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#define ARG CArgs::s_instance
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class CArgs {
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public:
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CArgs() :
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m_pname(NULL),
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m_backend(false),
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m_restartable(true),
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m_daemon(true),
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m_logFilter(NULL),
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m_serverAddress(NULL)
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{ s_instance = this; }
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~CArgs() { s_instance = NULL; }
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public:
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static CArgs* s_instance;
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const char* m_pname;
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bool m_backend;
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bool m_restartable;
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bool m_daemon;
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const char* m_logFilter;
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CString m_name;
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CNetworkAddress* m_serverAddress;
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};
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CArgs* CArgs::s_instance = NULL;
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//
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// platform dependent factories
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//
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static
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CScreen*
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createScreen()
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{
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#if WINAPI_MSWINDOWS
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return new CScreen(new CMSWindowsScreen(false,
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new CFunctionJob(&handleSystemSuspend),
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new CFunctionJob(&handleSystemResume)));
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#elif WINAPI_XWINDOWS
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return new CScreen(new CXWindowsScreen(false));
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#elif WINAPI_CARBON
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return new CScreen(new COSXScreen(false));
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#endif
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}
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static
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CClientTaskBarReceiver*
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createTaskBarReceiver(const CBufferedLogOutputter* logBuffer)
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{
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#if WINAPI_MSWINDOWS
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return new CMSWindowsClientTaskBarReceiver(
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CMSWindowsScreen::getInstance(), logBuffer);
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#elif WINAPI_XWINDOWS
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return new CXWindowsClientTaskBarReceiver(logBuffer);
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#elif WINAPI_CARBON
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return new COSXClientTaskBarReceiver(logBuffer);
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#endif
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}
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//
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// platform independent main
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//
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static CClient* s_client = NULL;
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static CScreen* s_clientScreen = NULL;
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static CClientTaskBarReceiver* s_taskBarReceiver = NULL;
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static double s_retryTime = 0.0;
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static bool s_suspened = false;
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static
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void
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updateStatus()
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{
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s_taskBarReceiver->updateStatus(s_client, "");
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}
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static
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void
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updateStatus(const CString& msg)
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{
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s_taskBarReceiver->updateStatus(s_client, msg);
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}
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static
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void
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resetRestartTimeout()
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{
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s_retryTime = 0.0;
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}
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static
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double
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nextRestartTimeout()
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{
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// choose next restart timeout. we start with rapid retries
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// then slow down.
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if (s_retryTime < 1.0) {
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s_retryTime = 1.0;
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}
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else if (s_retryTime < 3.0) {
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s_retryTime = 3.0;
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}
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else if (s_retryTime < 5.0) {
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s_retryTime = 5.0;
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}
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else if (s_retryTime < 15.0) {
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s_retryTime = 15.0;
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}
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else if (s_retryTime < 30.0) {
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s_retryTime = 30.0;
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}
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else {
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s_retryTime = 60.0;
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}
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return s_retryTime;
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}
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static
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void
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handleScreenError(const CEvent&, void*)
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{
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LOG((CLOG_CRIT "error on screen"));
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EVENTQUEUE->addEvent(CEvent(CEvent::kQuit));
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}
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#if WINAPI_MSWINDOWS
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static
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void
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handleSystemSuspend(void*)
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{
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LOG((CLOG_NOTE "system suspending"));
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s_suspened = true;
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s_client->disconnect(NULL);
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}
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static
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void
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handleSystemResume(void*)
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{
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LOG((CLOG_NOTE "system resuming"));
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s_suspened = false;
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startClient();
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}
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#endif
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static
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CScreen*
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openClientScreen()
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{
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CScreen* screen = createScreen();
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EVENTQUEUE->adoptHandler(IScreen::getErrorEvent(),
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screen->getEventTarget(),
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new CFunctionEventJob(
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&handleScreenError));
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return screen;
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}
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static
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void
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closeClientScreen(CScreen* screen)
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{
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if (screen != NULL) {
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EVENTQUEUE->removeHandler(IScreen::getErrorEvent(),
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screen->getEventTarget());
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delete screen;
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}
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}
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static
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void
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handleClientRestart(const CEvent&, void* vtimer)
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{
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// discard old timer
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CEventQueueTimer* timer = reinterpret_cast<CEventQueueTimer*>(vtimer);
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EVENTQUEUE->deleteTimer(timer);
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EVENTQUEUE->removeHandler(CEvent::kTimer, timer);
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// reconnect
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if (!s_suspened) {
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startClient();
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}
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}
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static
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void
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scheduleClientRestart(double retryTime)
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{
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// install a timer and handler to retry later
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LOG((CLOG_DEBUG "retry in %.0f seconds", retryTime));
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CEventQueueTimer* timer = EVENTQUEUE->newOneShotTimer(retryTime, NULL);
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EVENTQUEUE->adoptHandler(CEvent::kTimer, timer,
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new CFunctionEventJob(&handleClientRestart, timer));
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}
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static
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void
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handleClientConnected(const CEvent&, void*)
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{
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LOG((CLOG_DEBUG "connected to server"));
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resetRestartTimeout();
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updateStatus();
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}
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static
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void
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handleClientFailed(const CEvent& e, void*)
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{
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CClient::CFailInfo* info =
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reinterpret_cast<CClient::CFailInfo*>(e.getData());
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updateStatus(CString("Failed to connect to server: ") + info->m_what);
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if (!ARG->m_restartable || !info->m_retry) {
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LOG((CLOG_ERR "failed to connect to server: %s", info->m_what));
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}
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else {
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LOG((CLOG_WARN "failed to connect to server: %s", info->m_what));
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if (!s_suspened) {
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scheduleClientRestart(nextRestartTimeout());
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}
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}
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}
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static
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void
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handleClientDisconnected(const CEvent&, void*)
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{
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LOG((CLOG_NOTE "disconnected from server"));
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if (!ARG->m_restartable) {
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EVENTQUEUE->addEvent(CEvent(CEvent::kQuit));
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}
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else if (!s_suspened) {
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s_client->connect();
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}
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updateStatus();
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}
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static
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CClient*
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openClient(const CString& name, const CNetworkAddress& address, CScreen* screen)
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{
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CClient* client = new CClient(name, address,
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new CTCPSocketFactory, NULL, screen);
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EVENTQUEUE->adoptHandler(CClient::getConnectedEvent(),
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client->getEventTarget(),
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new CFunctionEventJob(handleClientConnected));
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EVENTQUEUE->adoptHandler(CClient::getConnectionFailedEvent(),
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client->getEventTarget(),
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new CFunctionEventJob(handleClientFailed));
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EVENTQUEUE->adoptHandler(CClient::getDisconnectedEvent(),
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client->getEventTarget(),
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new CFunctionEventJob(handleClientDisconnected));
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return client;
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}
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static
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void
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closeClient(CClient* client)
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{
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if (client == NULL) {
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return;
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}
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EVENTQUEUE->removeHandler(CClient::getConnectedEvent(), client);
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EVENTQUEUE->removeHandler(CClient::getConnectionFailedEvent(), client);
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EVENTQUEUE->removeHandler(CClient::getDisconnectedEvent(), client);
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delete client;
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}
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static
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bool
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startClient()
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{
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double retryTime;
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CScreen* clientScreen = NULL;
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try {
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if (s_clientScreen == NULL) {
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clientScreen = openClientScreen();
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s_client = openClient(ARG->m_name,
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*ARG->m_serverAddress, clientScreen);
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s_clientScreen = clientScreen;
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LOG((CLOG_NOTE "started client"));
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}
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s_client->connect();
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updateStatus();
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return true;
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}
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catch (XScreenUnavailable& e) {
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LOG((CLOG_WARN "cannot open secondary screen: %s", e.what()));
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closeClientScreen(clientScreen);
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updateStatus(CString("Cannot open secondary screen: ") + e.what());
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retryTime = e.getRetryTime();
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}
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catch (XScreenOpenFailure& e) {
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LOG((CLOG_CRIT "cannot open secondary screen: %s", e.what()));
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closeClientScreen(clientScreen);
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return false;
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}
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catch (XBase& e) {
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LOG((CLOG_CRIT "failed to start client: %s", e.what()));
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closeClientScreen(clientScreen);
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return false;
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}
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if (ARG->m_restartable) {
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scheduleClientRestart(retryTime);
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return true;
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}
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else {
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// don't try again
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return false;
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}
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}
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static
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void
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stopClient()
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{
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closeClient(s_client);
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closeClientScreen(s_clientScreen);
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s_client = NULL;
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s_clientScreen = NULL;
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}
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static
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int
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mainLoop()
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{
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// create socket multiplexer. this must happen after daemonization
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// on unix because threads evaporate across a fork().
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CSocketMultiplexer multiplexer;
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// create the event queue
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CEventQueue eventQueue;
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// start the client. if this return false then we've failed and
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// we shouldn't retry.
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LOG((CLOG_DEBUG1 "starting client"));
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if (!startClient()) {
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return kExitFailed;
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}
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// run event loop. if startClient() failed we're supposed to retry
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// later. the timer installed by startClient() will take care of
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// that.
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CEvent event;
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DAEMON_RUNNING(true);
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EVENTQUEUE->getEvent(event);
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while (event.getType() != CEvent::kQuit) {
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EVENTQUEUE->dispatchEvent(event);
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CEvent::deleteData(event);
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EVENTQUEUE->getEvent(event);
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}
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DAEMON_RUNNING(false);
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// close down
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LOG((CLOG_DEBUG1 "stopping client"));
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stopClient();
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updateStatus();
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LOG((CLOG_NOTE "stopped client"));
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return kExitSuccess;
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}
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static
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int
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daemonMainLoop(int, const char**)
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{
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CSystemLogger sysLogger(DAEMON_NAME);
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return mainLoop();
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}
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static
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int
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standardStartup(int argc, char** argv)
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{
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// parse command line
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parse(argc, argv);
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// daemonize if requested
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if (ARG->m_daemon) {
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return ARCH->daemonize(DAEMON_NAME, &daemonMainLoop);
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}
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else {
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return mainLoop();
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}
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}
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static
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int
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run(int argc, char** argv, ILogOutputter* outputter, StartupFunc startup)
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{
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// general initialization
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ARG->m_serverAddress = new CNetworkAddress;
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ARG->m_pname = ARCH->getBasename(argv[0]);
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// install caller's output filter
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if (outputter != NULL) {
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CLOG->insert(outputter);
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}
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// save log messages
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CBufferedLogOutputter logBuffer(1000);
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CLOG->insert(&logBuffer, true);
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// make the task bar receiver. the user can control this app
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// through the task bar.
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s_taskBarReceiver = createTaskBarReceiver(&logBuffer);
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// run
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int result = startup(argc, argv);
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// done with task bar receiver
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delete s_taskBarReceiver;
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// done with log buffer
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CLOG->remove(&logBuffer);
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delete ARG->m_serverAddress;
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return result;
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}
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//
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// command line parsing
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//
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#define BYE "\nTry `%s --help' for more information."
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static void (*bye)(int) = &exit;
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static
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void
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version()
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{
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LOG((CLOG_PRINT "%s %s, protocol version %d.%d\n%s",
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ARG->m_pname,
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kVersion,
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kProtocolMajorVersion,
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kProtocolMinorVersion,
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kCopyright));
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}
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static
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void
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help()
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{
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LOG((CLOG_PRINT
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"Usage: %s"
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" [--daemon|--no-daemon]"
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" [--debug <level>]"
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" [--name <screen-name>]"
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" [--restart|--no-restart]"
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" <server-address>\n"
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"\n"
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"Start the synergy mouse/keyboard sharing server.\n"
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"\n"
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" -d, --debug <level> filter out log messages with priorty below level.\n"
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" level may be: FATAL, ERROR, WARNING, NOTE, INFO,\n"
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" DEBUG, DEBUG1, DEBUG2.\n"
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" -f, --no-daemon run the client in the foreground.\n"
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"* --daemon run the client as a daemon.\n"
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" -n, --name <screen-name> use screen-name instead the hostname to identify\n"
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" ourself to the server.\n"
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" -1, --no-restart do not try to restart the client if it fails for\n"
|
|
" some reason.\n"
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"* --restart restart the client automatically if it fails.\n"
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|
" -h, --help display this help and exit.\n"
|
|
" --version display version information and exit.\n"
|
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"\n"
|
|
"* marks defaults.\n"
|
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"\n"
|
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"The server address is of the form: [<hostname>][:<port>]. The hostname\n"
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"must be the address or hostname of the server. The port overrides the\n"
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"default port, %d.\n"
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"\n"
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"Where log messages go depends on the platform and whether or not the\n"
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"client is running as a daemon.",
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ARG->m_pname, kDefaultPort));
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}
|
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|
|
static
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|
bool
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isArg(int argi, int argc, const char* const* argv,
|
|
const char* name1, const char* name2,
|
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int minRequiredParameters = 0)
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|
{
|
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if ((name1 != NULL && strcmp(argv[argi], name1) == 0) ||
|
|
(name2 != NULL && strcmp(argv[argi], name2) == 0)) {
|
|
// match. check args left.
|
|
if (argi + minRequiredParameters >= argc) {
|
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LOG((CLOG_PRINT "%s: missing arguments for `%s'" BYE,
|
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ARG->m_pname, argv[argi], ARG->m_pname));
|
|
bye(kExitArgs);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// no match
|
|
return false;
|
|
}
|
|
|
|
static
|
|
void
|
|
parse(int argc, const char* const* argv)
|
|
{
|
|
assert(ARG->m_pname != NULL);
|
|
assert(argv != NULL);
|
|
assert(argc >= 1);
|
|
|
|
// set defaults
|
|
ARG->m_name = ARCH->getHostName();
|
|
|
|
// parse options
|
|
int i;
|
|
for (i = 1; i < argc; ++i) {
|
|
if (isArg(i, argc, argv, "-d", "--debug", 1)) {
|
|
// change logging level
|
|
ARG->m_logFilter = argv[++i];
|
|
}
|
|
|
|
else if (isArg(i, argc, argv, "-n", "--name", 1)) {
|
|
// save screen name
|
|
ARG->m_name = argv[++i];
|
|
}
|
|
|
|
else if (isArg(i, argc, argv, NULL, "--camp")) {
|
|
// ignore -- included for backwards compatibility
|
|
}
|
|
|
|
else if (isArg(i, argc, argv, NULL, "--no-camp")) {
|
|
// ignore -- included for backwards compatibility
|
|
}
|
|
|
|
else if (isArg(i, argc, argv, "-f", "--no-daemon")) {
|
|
// not a daemon
|
|
ARG->m_daemon = false;
|
|
}
|
|
|
|
else if (isArg(i, argc, argv, NULL, "--daemon")) {
|
|
// daemonize
|
|
ARG->m_daemon = true;
|
|
}
|
|
|
|
else if (isArg(i, argc, argv, "-1", "--no-restart")) {
|
|
// don't try to restart
|
|
ARG->m_restartable = false;
|
|
}
|
|
|
|
else if (isArg(i, argc, argv, NULL, "--restart")) {
|
|
// try to restart
|
|
ARG->m_restartable = true;
|
|
}
|
|
|
|
else if (isArg(i, argc, argv, "-z", NULL)) {
|
|
ARG->m_backend = true;
|
|
}
|
|
|
|
else if (isArg(i, argc, argv, "-h", "--help")) {
|
|
help();
|
|
bye(kExitSuccess);
|
|
}
|
|
|
|
else if (isArg(i, argc, argv, NULL, "--version")) {
|
|
version();
|
|
bye(kExitSuccess);
|
|
}
|
|
|
|
else if (isArg(i, argc, argv, "--", NULL)) {
|
|
// remaining arguments are not options
|
|
++i;
|
|
break;
|
|
}
|
|
|
|
else if (argv[i][0] == '-') {
|
|
LOG((CLOG_PRINT "%s: unrecognized option `%s'" BYE,
|
|
ARG->m_pname, argv[i], ARG->m_pname));
|
|
bye(kExitArgs);
|
|
}
|
|
|
|
else {
|
|
// this and remaining arguments are not options
|
|
break;
|
|
}
|
|
}
|
|
|
|
// exactly one non-option argument (server-address)
|
|
if (i == argc) {
|
|
LOG((CLOG_PRINT "%s: a server address or name is required" BYE,
|
|
ARG->m_pname, ARG->m_pname));
|
|
bye(kExitArgs);
|
|
}
|
|
if (i + 1 != argc) {
|
|
LOG((CLOG_PRINT "%s: unrecognized option `%s'" BYE,
|
|
ARG->m_pname, argv[i], ARG->m_pname));
|
|
bye(kExitArgs);
|
|
}
|
|
|
|
// save server address
|
|
try {
|
|
*ARG->m_serverAddress = CNetworkAddress(argv[i], kDefaultPort);
|
|
}
|
|
catch (XSocketAddress& e) {
|
|
LOG((CLOG_PRINT "%s: %s" BYE,
|
|
ARG->m_pname, e.what(), ARG->m_pname));
|
|
bye(kExitFailed);
|
|
}
|
|
|
|
// increase default filter level for daemon. the user must
|
|
// explicitly request another level for a daemon.
|
|
if (ARG->m_daemon && ARG->m_logFilter == NULL) {
|
|
#if SYSAPI_WIN32
|
|
if (CArchMiscWindows::isWindows95Family()) {
|
|
// windows 95 has no place for logging so avoid showing
|
|
// the log console window.
|
|
ARG->m_logFilter = "FATAL";
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
ARG->m_logFilter = "NOTE";
|
|
}
|
|
}
|
|
|
|
// set log filter
|
|
if (!CLOG->setFilter(ARG->m_logFilter)) {
|
|
LOG((CLOG_PRINT "%s: unrecognized log level `%s'" BYE,
|
|
ARG->m_pname, ARG->m_logFilter, ARG->m_pname));
|
|
bye(kExitArgs);
|
|
}
|
|
}
|
|
|
|
|
|
//
|
|
// platform dependent entry points
|
|
//
|
|
|
|
#if SYSAPI_WIN32
|
|
|
|
static bool s_hasImportantLogMessages = false;
|
|
|
|
//
|
|
// CMessageBoxOutputter
|
|
//
|
|
// This class writes severe log messages to a message box
|
|
//
|
|
|
|
class CMessageBoxOutputter : public ILogOutputter {
|
|
public:
|
|
CMessageBoxOutputter() { }
|
|
virtual ~CMessageBoxOutputter() { }
|
|
|
|
// ILogOutputter overrides
|
|
virtual void open(const char*) { }
|
|
virtual void close() { }
|
|
virtual bool write(ELevel level, const char* message);
|
|
virtual const char* getNewline() const { return ""; }
|
|
};
|
|
|
|
bool
|
|
CMessageBoxOutputter::write(ELevel level, const char* message)
|
|
{
|
|
// note any important messages the user may need to know about
|
|
if (level <= CLog::kWARNING) {
|
|
s_hasImportantLogMessages = true;
|
|
}
|
|
|
|
// FATAL and PRINT messages get a dialog box if not running as
|
|
// backend. if we're running as a backend the user will have
|
|
// a chance to see the messages when we exit.
|
|
if (!ARG->m_backend && level <= CLog::kFATAL) {
|
|
MessageBox(NULL, message, ARG->m_pname, MB_OK | MB_ICONWARNING);
|
|
return false;
|
|
}
|
|
else {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
static
|
|
void
|
|
byeThrow(int x)
|
|
{
|
|
CArchMiscWindows::daemonFailed(x);
|
|
}
|
|
|
|
static
|
|
int
|
|
daemonNTMainLoop(int argc, const char** argv)
|
|
{
|
|
parse(argc, argv);
|
|
ARG->m_backend = false;
|
|
return CArchMiscWindows::runDaemon(mainLoop);
|
|
}
|
|
|
|
static
|
|
int
|
|
daemonNTStartup(int, char**)
|
|
{
|
|
CSystemLogger sysLogger(DAEMON_NAME);
|
|
bye = &byeThrow;
|
|
return ARCH->daemonize(DAEMON_NAME, &daemonNTMainLoop);
|
|
}
|
|
|
|
static
|
|
void
|
|
showError(HINSTANCE instance, const char* title, UINT id, const char* arg)
|
|
{
|
|
CString fmt = CMSWindowsUtil::getString(instance, id);
|
|
CString msg = CStringUtil::format(fmt.c_str(), arg);
|
|
MessageBox(NULL, msg.c_str(), title, MB_OK | MB_ICONWARNING);
|
|
}
|
|
|
|
int WINAPI
|
|
WinMain(HINSTANCE instance, HINSTANCE, LPSTR, int)
|
|
{
|
|
try {
|
|
CArch arch(instance);
|
|
CMSWindowsScreen::init(instance);
|
|
CLOG;
|
|
CThread::getCurrentThread().setPriority(-14);
|
|
CArgs args;
|
|
|
|
// windows NT family starts services using no command line options.
|
|
// since i'm not sure how to tell the difference between that and
|
|
// a user providing no options we'll assume that if there are no
|
|
// arguments and we're on NT then we're being invoked as a service.
|
|
// users on NT can use `--daemon' or `--no-daemon' to force us out
|
|
// of the service code path.
|
|
StartupFunc startup = &standardStartup;
|
|
if (__argc <= 1 && !CArchMiscWindows::isWindows95Family()) {
|
|
startup = &daemonNTStartup;
|
|
}
|
|
|
|
// send PRINT and FATAL output to a message box
|
|
int result = run(__argc, __argv, new CMessageBoxOutputter, startup);
|
|
|
|
// let user examine any messages if we're running as a backend
|
|
// by putting up a dialog box before exiting.
|
|
if (args.m_backend && s_hasImportantLogMessages) {
|
|
showError(instance, args.m_pname, IDS_FAILED, "");
|
|
}
|
|
|
|
delete CLOG;
|
|
return result;
|
|
}
|
|
catch (XBase& e) {
|
|
showError(instance, __argv[0], IDS_UNCAUGHT_EXCEPTION, e.what());
|
|
throw;
|
|
}
|
|
catch (XArch& e) {
|
|
showError(instance, __argv[0], IDS_INIT_FAILED, e.what().c_str());
|
|
return kExitFailed;
|
|
}
|
|
catch (...) {
|
|
showError(instance, __argv[0], IDS_UNCAUGHT_EXCEPTION, "<unknown>");
|
|
throw;
|
|
}
|
|
}
|
|
|
|
#elif SYSAPI_UNIX
|
|
|
|
int
|
|
main(int argc, char** argv)
|
|
{
|
|
CArgs args;
|
|
try {
|
|
int result;
|
|
CArch arch;
|
|
CLOG;
|
|
CArgs args;
|
|
result = run(argc, argv, NULL, &standardStartup);
|
|
delete CLOG;
|
|
return result;
|
|
}
|
|
catch (XBase& e) {
|
|
LOG((CLOG_CRIT "Uncaught exception: %s\n", e.what()));
|
|
throw;
|
|
}
|
|
catch (XArch& e) {
|
|
LOG((CLOG_CRIT "Initialization failed: %s" BYE, e.what().c_str()));
|
|
return kExitFailed;
|
|
}
|
|
catch (...) {
|
|
LOG((CLOG_CRIT "Uncaught exception: <unknown exception>\n"));
|
|
throw;
|
|
}
|
|
}
|
|
|
|
#else
|
|
|
|
#error no main() for platform
|
|
|
|
#endif
|