634 lines
13 KiB
C++
634 lines
13 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 "ISecondaryScreenFactory.h"
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#include "CPlatform.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 "CNetwork.h"
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#include "CNetworkAddress.h"
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#include "CTCPSocketFactory.h"
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#include "XSocket.h"
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#include "CCondVar.h"
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#include "CLock.h"
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#include "CMutex.h"
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#include "CThread.h"
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#include "XThread.h"
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#include "CLog.h"
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#include "CString.h"
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#include <cstring>
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#if WINDOWS_LIKE
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#include "CMSWindowsSecondaryScreen.h"
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#include "resource.h"
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#elif UNIX_LIKE
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#include "CXWindowsSecondaryScreen.h"
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#endif
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// platform dependent name of a daemon
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#if WINDOWS_LIKE
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#define DAEMON_NAME "Synergy Client"
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#elif UNIX_LIKE
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#define DAEMON_NAME "synergyc"
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#endif
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//
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// program arguments
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//
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static const char* pname = NULL;
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static bool s_backend = false;
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static bool s_restartable = true;
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static bool s_daemon = true;
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static bool s_camp = true;
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static const char* s_logFilter = NULL;
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static CString s_name;
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static CNetworkAddress s_serverAddress;
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//
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// logging thread safety
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//
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static CMutex* s_logMutex = NULL;
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static
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void
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logLock(bool lock)
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{
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assert(s_logMutex != NULL);
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if (lock) {
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s_logMutex->lock();
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}
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else {
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s_logMutex->unlock();
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}
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}
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//
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// platform dependent factories
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//
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class CSecondaryScreenFactory : public ISecondaryScreenFactory {
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public:
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CSecondaryScreenFactory() { }
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virtual ~CSecondaryScreenFactory() { }
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// ISecondaryScreenFactory overrides
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virtual CSecondaryScreen*
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create(IScreenReceiver*);
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};
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CSecondaryScreen*
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CSecondaryScreenFactory::create(IScreenReceiver* receiver)
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{
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#if WINDOWS_LIKE
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return new CMSWindowsSecondaryScreen(receiver);
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#elif UNIX_LIKE
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return new CXWindowsSecondaryScreen(receiver);
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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
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int
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realMain(CMutex* mutex)
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{
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// caller should have mutex locked on entry
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// initialize threading library
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CThread::init();
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// make logging thread safe
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CMutex logMutex;
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s_logMutex = &logMutex;
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CLog::setLock(&logLock);
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int result = kExitSuccess;
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do {
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bool opened = false;
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bool locked = true;
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try {
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// create client
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s_client = new CClient(s_name);
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s_client->camp(s_camp);
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s_client->setAddress(s_serverAddress);
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s_client->setScreenFactory(new CSecondaryScreenFactory);
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s_client->setSocketFactory(new CTCPSocketFactory);
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s_client->setStreamFilterFactory(NULL);
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// open client
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try {
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s_client->open();
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opened = true;
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// run client
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if (mutex != NULL) {
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mutex->unlock();
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}
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locked = false;
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s_client->mainLoop();
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locked = true;
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// get client status
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if (s_client->wasRejected()) {
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// try again later. we don't want to bother
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// the server very often if it doesn't want us.
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throw XScreenUnavailable(60.0);
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}
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// clean up
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#define FINALLY do { \
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if (!locked && mutex != NULL) { \
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mutex->lock(); \
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} \
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if (s_client != NULL) { \
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if (opened) { \
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s_client->close(); \
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} \
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} \
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delete s_client; \
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s_client = NULL; \
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} while (false)
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FINALLY;
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}
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catch (XScreenUnavailable& e) {
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// wait before retrying if we're going to retry
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if (s_restartable) {
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CThread::sleep(e.getRetryTime());
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}
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else {
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result = kExitFailed;
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}
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FINALLY;
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}
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catch (XThread&) {
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FINALLY;
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throw;
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}
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catch (...) {
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// don't try to restart and fail
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s_restartable = false;
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result = kExitFailed;
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FINALLY;
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}
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#undef FINALLY
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}
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catch (XBase& e) {
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LOG((CLOG_CRIT "failed: %s", e.what()));
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}
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catch (XThread&) {
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// terminated
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s_restartable = false;
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result = kExitTerminated;
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}
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catch (...) {
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CLog::setLock(NULL);
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s_logMutex = NULL;
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throw;
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}
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} while (s_restartable);
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// clean up
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CLog::setLock(NULL);
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s_logMutex = NULL;
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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
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"%s %s, protocol version %d.%d\n"
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"%s",
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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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" [--camp|--no-camp]"
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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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"* --camp keep attempting to connect to the server until\n"
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" successful.\n"
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" --no-camp do not camp.\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"
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" 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"
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" --version display version information and exit.\n"
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"\n"
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"* 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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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** argv,
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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) ||
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(name2 != NULL && strcmp(argv[argi], name2) == 0)) {
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// match. check args left.
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if (argi + minRequiredParameters >= argc) {
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LOG((CLOG_PRINT "%s: missing arguments for `%s'" BYE,
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pname, argv[argi], pname));
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bye(kExitArgs);
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}
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return true;
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}
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// no match
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return false;
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}
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static
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void
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parse(int argc, const char** argv)
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{
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assert(pname != NULL);
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assert(argv != NULL);
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assert(argc >= 1);
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// set defaults
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char hostname[256];
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if (CNetwork::gethostname(hostname, sizeof(hostname)) != CNetwork::Error) {
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s_name = hostname;
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}
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// parse options
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int i;
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for (i = 1; i < argc; ++i) {
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if (isArg(i, argc, argv, "-d", "--debug", 1)) {
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// change logging level
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s_logFilter = argv[++i];
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}
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else if (isArg(i, argc, argv, "-n", "--name", 1)) {
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// save screen name
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s_name = argv[++i];
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}
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else if (isArg(i, argc, argv, NULL, "--camp")) {
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// enable camping
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s_camp = true;
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}
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else if (isArg(i, argc, argv, NULL, "--no-camp")) {
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// disable camping
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s_camp = false;
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}
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else if (isArg(i, argc, argv, "-f", "--no-daemon")) {
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// not a daemon
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s_daemon = false;
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}
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else if (isArg(i, argc, argv, NULL, "--daemon")) {
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// daemonize
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s_daemon = true;
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}
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else if (isArg(i, argc, argv, "-1", "--no-restart")) {
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// don't try to restart
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s_restartable = false;
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}
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else if (isArg(i, argc, argv, NULL, "--restart")) {
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// try to restart
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s_restartable = true;
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}
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else if (isArg(i, argc, argv, "-z", NULL)) {
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s_backend = true;
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}
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else if (isArg(i, argc, argv, "-h", "--help")) {
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help();
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bye(kExitSuccess);
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}
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else if (isArg(i, argc, argv, NULL, "--version")) {
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version();
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bye(kExitSuccess);
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}
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else if (isArg(i, argc, argv, "--", NULL)) {
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// remaining arguments are not options
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++i;
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break;
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}
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else if (argv[i][0] == '-') {
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LOG((CLOG_PRINT "%s: unrecognized option `%s'" BYE,
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pname, argv[i], pname));
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bye(kExitArgs);
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}
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else {
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// this and remaining arguments are not options
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break;
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}
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}
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// exactly one non-option argument (server-address)
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if (i == argc) {
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LOG((CLOG_PRINT "%s: a server address or name is required" BYE,
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pname, pname));
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bye(kExitArgs);
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}
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if (i + 1 != argc) {
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LOG((CLOG_PRINT "%s: unrecognized option `%s'" BYE,
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pname, argv[i], pname));
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bye(kExitArgs);
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}
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// save server address
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try {
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s_serverAddress = CNetworkAddress(argv[i], kDefaultPort);
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}
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catch (XSocketAddress& e) {
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LOG((CLOG_PRINT "%s: %s" BYE,
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pname, e.what(), pname));
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bye(kExitFailed);
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}
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// increase default filter level for daemon. the user must
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// explicitly request another level for a daemon.
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if (s_daemon && s_logFilter == NULL) {
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#if WINDOWS_LIKE
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if (CPlatform::isWindows95Family()) {
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// windows 95 has no place for logging so avoid showing
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// the log console window.
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s_logFilter = "FATAL";
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}
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else
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#endif
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{
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s_logFilter = "NOTE";
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}
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}
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// set log filter
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if (!CLog::setFilter(s_logFilter)) {
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LOG((CLOG_PRINT "%s: unrecognized log level `%s'" BYE,
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pname, s_logFilter, pname));
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bye(kExitArgs);
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}
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}
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//
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// platform dependent entry points
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//
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#if WINDOWS_LIKE
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#include "CMSWindowsScreen.h"
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static bool s_hasImportantLogMessages = false;
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static
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bool
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logMessageBox(int priority, const char* msg)
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{
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// note any important messages the user may need to know about
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if (priority <= CLog::kWARNING) {
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s_hasImportantLogMessages = true;
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}
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// FATAL and PRINT messages get a dialog box if not running as
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// backend. if we're running as a backend the user will have
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// a chance to see the messages when we exit.
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if (!s_backend && priority <= CLog::kFATAL) {
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MessageBox(NULL, msg, pname, MB_OK | MB_ICONWARNING);
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return true;
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}
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else {
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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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byeThrow(int x)
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{
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throw CWin32Platform::CDaemonFailed(x);
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}
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static
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void
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daemonStop(void)
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{
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s_client->exitMainLoop();
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}
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static
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int
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daemonStartup(IPlatform* iplatform, int argc, const char** argv)
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{
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// get platform pointer
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CWin32Platform* platform = static_cast<CWin32Platform*>(iplatform);
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// catch errors that would normally exit
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bye = &byeThrow;
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// parse command line
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parse(argc, argv);
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// cannot run as backend if running as a service
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s_backend = false;
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// run as a service
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return platform->runDaemon(realMain, daemonStop);
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}
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static
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int
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daemonStartup95(IPlatform*, int, const char**)
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{
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return realMain(NULL);
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}
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int WINAPI
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WinMain(HINSTANCE instance, HINSTANCE, LPSTR, int)
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{
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CPlatform platform;
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// save instance
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CMSWindowsScreen::init(instance);
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// get program name
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pname = platform.getBasename(__argv[0]);
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// initialize network library
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CNetwork::init();
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// send PRINT and FATAL output to a message box
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CLog::setOutputter(&logMessageBox);
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// windows NT family starts services using no command line options.
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// since i'm not sure how to tell the difference between that and
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// a user providing no options we'll assume that if there are no
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// arguments and we're on NT then we're being invoked as a service.
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// users on NT can use `--daemon' or `--no-daemon' to force us out
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// of the service code path.
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if (__argc <= 1 && !CWin32Platform::isWindows95Family()) {
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int result = platform.daemonize(DAEMON_NAME, &daemonStartup);
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if (result == -1) {
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LOG((CLOG_CRIT "failed to start as a service" BYE, pname));
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return kExitFailed;
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}
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return result;
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}
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// parse command line
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parse(__argc, const_cast<const char**>(__argv));
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// daemonize if requested
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int result;
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if (s_daemon) {
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// redirect log messages
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platform.installDaemonLogger(DAEMON_NAME);
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// start as a daemon
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if (CWin32Platform::isWindows95Family()) {
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result = platform.daemonize(DAEMON_NAME, &daemonStartup95);
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if (result == -1) {
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LOG((CLOG_CRIT "failed to start as a service" BYE, pname));
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result = kExitFailed;
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}
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}
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else {
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// cannot start a service from the command line so just
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// run normally (except with log messages redirected).
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result = realMain(NULL);
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}
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}
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else {
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// run
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result = realMain(NULL);
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}
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CNetwork::cleanup();
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// let user examine any messages if we're running as a backend
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// by putting up a dialog box before exiting.
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if (s_backend && s_hasImportantLogMessages) {
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char msg[1024];
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msg[0] = '\0';
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LoadString(instance, IDS_FAILED, msg, sizeof(msg) / sizeof(msg[0]));
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MessageBox(NULL, msg, pname, MB_OK | MB_ICONWARNING);
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}
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return result;
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}
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#elif UNIX_LIKE
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static
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int
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daemonStartup(IPlatform*, int, const char**)
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{
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return realMain(NULL);
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}
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int
|
|
main(int argc, char** argv)
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|
{
|
|
CPlatform platform;
|
|
|
|
// get program name
|
|
pname = platform.getBasename(argv[0]);
|
|
|
|
// initialize network library
|
|
CNetwork::init();
|
|
|
|
// parse command line
|
|
parse(argc, const_cast<const char**>(argv));
|
|
|
|
// daemonize if requested
|
|
int result;
|
|
if (s_daemon) {
|
|
result = platform.daemonize(DAEMON_NAME, &daemonStartup);
|
|
if (result == -1) {
|
|
LOG((CLOG_CRIT "failed to daemonize"));
|
|
return kExitFailed;
|
|
}
|
|
}
|
|
else {
|
|
result = realMain(NULL);
|
|
}
|
|
|
|
CNetwork::cleanup();
|
|
|
|
return result;
|
|
}
|
|
|
|
#else
|
|
|
|
#error no main() for platform
|
|
|
|
#endif
|