managed secure socket allocation and deallocation #4313

src/lib/client/Client.cpp

@@ -81,7 +81,8 @@ Client::Client(
 	m_sendFileThread(NULL),
 	m_writeToDropDirThread(NULL),
 	m_enableDragDrop(enableDragDrop),
-	m_socket(NULL)
+	m_socket(NULL),
+	m_useSecureNetwork(false)
 {
 	assert(m_socketFactory != NULL);
 	assert(m_screen        != NULL);
@@ -155,13 +156,13 @@ Client::connect()
 		}
 
 		// create the socket
-		bool useSecureSocket = ARCH->plugin().exists(s_networkSecurity);
-		IDataSocket* socket = m_socketFactory->create(useSecureSocket);
+		m_useSecureNetwork = ARCH->plugin().exists(s_networkSecurity);
+		IDataSocket* socket = m_socketFactory->create(m_useSecureNetwork);
 		m_socket = dynamic_cast<TCPSocket*>(socket);
 
 		// filter socket messages, including a packetizing filter
 		m_stream = socket;
-		bool adopt = !useSecureSocket;
+		bool adopt = !m_useSecureNetwork;
 		m_stream = new PacketStreamFilter(m_events, m_stream, adopt);
 
 		if (m_crypto.m_mode != kDisabled) {
@@ -570,10 +571,14 @@ Client::cleanupTimer()
 void
 Client::cleanupStream()
 {
-	bool useSecureSocket = ARCH->plugin().exists(s_networkSecurity);
-	if (!useSecureSocket) {
 	delete m_stream;
 	m_stream = NULL;
+
+	// PacketStreamFilter doen't adopt secure socket, because
+	// we need to tell the dynamic lib that allocated this object
+	// to do the deletion.
+	if (m_useSecureNetwork) {
+		ARCH->plugin().invoke(s_networkSecurity, "deleteSocket", NULL);
 	}
 }
 

src/lib/client/Client.h

@@ -233,4 +233,5 @@ private:
 	Thread*				m_writeToDropDirThread;
 	bool				m_enableDragDrop;
 	TCPSocket*			m_socket;
+	bool				m_useSecureNetwork;
 };

src/lib/io/StreamFilter.h

@@ -49,13 +49,13 @@ public:
 	virtual bool		isReady() const;
 	virtual UInt32		getSize() const;
 
-protected:
 	//! Get the stream
 	/*!
 	Returns the stream passed to the c'tor.
 	*/
 	synergy::IStream*	getStream() const;
 
+protected:
 	//! Handle events from source stream
 	/*!
 	Does the event filtering.  The default simply dispatches an event

src/lib/net/IListenSocket.h

@@ -39,7 +39,15 @@ public:
 	data stream.  Returns NULL if no socket is waiting to be accepted.
 	This is only valid after a call to \c bind().
 	*/
-	virtual IDataSocket*	accept() = 0;
+	virtual IDataSocket*
+						accept() = 0;
+
+	//! Delete connection socket
+	/*!
+	This is used when the socket was created but not adopted by a client
+	proxy.
+	*/
+	virtual void		deleteSocket(void*) = 0;
 
 	//@}
 

src/lib/net/TCPListenSocket.h

@@ -43,8 +43,7 @@ public:
 	// IListenSocket overrides
 	virtual IDataSocket*
 						accept();
-
-	ArchSocket&			getSocket() { return m_socket; }
+	virtual void		deleteSocket(void*) { }
 
 public:
 	ISocketMultiplexerJob*

src/lib/net/TCPSocketFactory.cpp

@@ -55,7 +55,7 @@ TCPSocketFactory::create(bool secure) const
 			m_socketMultiplexer
 		};
 		socket = static_cast<IDataSocket*>(
-			ARCH->plugin().invoke(s_networkSecurity, "getSecureSocket", args));
+			ARCH->plugin().invoke(s_networkSecurity, "getSocket", args));
 	}
 	else {
 		socket = new TCPSocket(m_events, m_socketMultiplexer);
@@ -74,7 +74,7 @@ TCPSocketFactory::createListen(bool secure) const
 			m_socketMultiplexer
 		};
 		socket = static_cast<IListenSocket*>(
-			ARCH->plugin().invoke(s_networkSecurity, "getSecureListenSocket", args));
+			ARCH->plugin().invoke(s_networkSecurity, "getListenSocket", args));
 	}
 	else {
 		socket = new TCPListenSocket(m_events, m_socketMultiplexer);

src/lib/plugin/ns/SecureListenSocket.cpp

@@ -36,6 +36,11 @@ SecureListenSocket::SecureListenSocket(
 
 SecureListenSocket::~SecureListenSocket()
 {
+	SecureSocketSet::iterator it;
+	for (it = m_secureSocketSet.begin(); it != m_secureSocketSet.end(); it++) {
+		delete *it;
+	}
+	m_secureSocketSet.clear();
 }
 
 IDataSocket*
@@ -47,6 +52,9 @@ SecureListenSocket::accept()
 						m_events,
 						m_socketMultiplexer,
 						ARCH->acceptSocket(m_socket, NULL));
+
+		m_secureSocketSet.insert(socket);
+
 		socket->initSsl(true);
 		// TODO: customized certificate path
 		socket->loadCertificates("C:\\Temp\\synergy.pem");
@@ -73,3 +81,14 @@ SecureListenSocket::accept()
 		throw ex;
 	}
 }
+
+void
+SecureListenSocket::deleteSocket(void* socket)
+{
+	SecureSocketSet::iterator it;
+	it = m_secureSocketSet.find((IDataSocket*)socket);
+	if (it != m_secureSocketSet.end()) {
+		delete *it;
+		m_secureSocketSet.erase(it);
+	}
+}

src/lib/plugin/ns/SecureListenSocket.h

@@ -18,9 +18,11 @@
 #pragma once
 
 #include "net/TCPListenSocket.h"
+#include "common/stdset.h"
 
 class IEventQueue;
 class SocketMultiplexer;
+class IDataSocket;
 
 class SecureListenSocket : public TCPListenSocket{
 public:
@@ -31,4 +33,10 @@ public:
 	// IListenSocket overrides
 	virtual IDataSocket*
 						accept();
+	void				deleteSocket(void*);
+
+private:
+	typedef std::set<IDataSocket*> SecureSocketSet;
+
+	SecureSocketSet		m_secureSocketSet;
 };

src/lib/plugin/ns/SecureSocket.cpp

@@ -68,21 +68,6 @@ SecureSocket::~SecureSocket()
 
 	delete[] m_error;
 }
-void
-SecureSocket::close()
-{
-	if (m_ssl->m_ssl != NULL) {
-		SSL_free(m_ssl->m_ssl);
-		m_ssl->m_ssl = NULL;
-	}
-
-	if (m_ssl->m_context != NULL) {
-		SSL_CTX_free(m_ssl->m_context);
-		m_ssl->m_context = NULL;
-	}
-
-	TCPSocket::close();
-}
 
 void
 SecureSocket::secureConnect()

src/lib/plugin/ns/SecureSocket.h

@@ -42,9 +42,6 @@ public:
 		ArchSocket socket);
 	~SecureSocket();
 
-	// ISocket overrides
-	void				close();
-
 	void				secureConnect();
 	void				secureAccept();
 	bool				isSecureReady();

src/lib/plugin/ns/ns.cpp

@@ -59,7 +59,7 @@ invoke(const char* command, void** args)
 		arg2 = reinterpret_cast<SocketMultiplexer*>(args[1]);
 	}
 
-	if (strcmp(command, "getSecureSocket") == 0) {
+	if (strcmp(command, "getSocket") == 0) {
 		if (g_secureSocket != NULL) {
 			delete g_secureSocket;
 		}
@@ -67,17 +67,28 @@ invoke(const char* command, void** args)
 		g_secureSocket->initSsl(false);
 		return g_secureSocket;
 	}
-	else if (strcmp(command, "getSecureListenSocket") == 0) {
+	else if (strcmp(command, "getListenSocket") == 0) {
 		if (g_secureListenSocket != NULL) {
 			delete g_secureListenSocket;
 		}
 		g_secureListenSocket = new SecureListenSocket(arg1, arg2);
 		return g_secureListenSocket;
 	}
-	else {
-		return NULL;
+	else if (strcmp(command, "deleteSocket") == 0) {
+		if (g_secureSocket != NULL) {
+			delete g_secureSocket;
+			g_secureSocket = NULL;
 		}
 	}
+	else if (strcmp(command, "deleteListenSocket") == 0) {
+		if (g_secureListenSocket != NULL) {
+			delete g_secureListenSocket;
+			g_secureListenSocket = NULL;
+		}
+	}
+
+	return NULL;
+}
 
 void
 cleanup()

src/lib/server/BaseClientProxy.h

@@ -21,6 +21,8 @@
 #include "synergy/IClient.h"
 #include "base/String.h"
 
+namespace synergy { class IStream; }
+
 //! Generic proxy for client or primary
 class BaseClientProxy : public IClient {
 public:
@@ -82,6 +84,8 @@ public:
 							size_t size) = 0;
 	virtual void		fileChunkSending(UInt8 mark, char* data, size_t dataSize) = 0;
 	virtual String		getName() const;
+	virtual synergy::IStream*
+						getStream() const = 0;
 
 private:
 	String				m_name;

src/lib/server/ClientListener.cpp

@@ -54,8 +54,8 @@ ClientListener::ClientListener(const NetworkAddress& address,
 
 	try {
 		// create listen socket
-		m_useSecureSocket = ARCH->plugin().exists(s_networkSecurity);
-		m_listen = m_socketFactory->createListen(m_useSecureSocket);
+		m_useSecureNetwork = ARCH->plugin().exists(s_networkSecurity);
+		m_listen = m_socketFactory->createListen(m_useSecureNetwork);
 
 		// bind listen address
 		LOG((CLOG_DEBUG1 "binding listen socket"));
@@ -115,6 +115,12 @@ ClientListener::setServer(Server* server)
 	m_server = server;
 }
 
+void
+ClientListener::deleteSocket(void* socket)
+{
+	m_listen->deleteSocket(socket);
+}
+
 ClientProxy*
 ClientListener::getNextClient()
 {
@@ -132,13 +138,16 @@ ClientListener::handleClientConnecting(const Event&, void*)
 {
 	// accept client connection
 	synergy::IStream* stream = m_listen->accept();
+
 	if (stream == NULL) {
 		return;
 	}
+
 	LOG((CLOG_NOTE "accepted client connection"));
 
 	// filter socket messages, including a packetizing filter
-	stream = new PacketStreamFilter(m_events, stream, true);
+	bool adopt = !m_useSecureNetwork;
+	stream = new PacketStreamFilter(m_events, stream, adopt);
 	
 	if (m_crypto.m_mode != kDisabled) {
 		CryptoStream* cryptoStream = new CryptoStream(
@@ -212,7 +221,13 @@ ClientListener::handleClientDisconnected(const Event&, void* vclient)
 void
 ClientListener::cleanupListenSocket()
 {
-	if (!m_useSecureSocket) {
+	if (!m_useSecureNetwork) {
 		delete m_listen;
 	}
+	else {
+		ARCH->plugin().invoke(
+			s_networkSecurity,
+			"deleteListenSocket",
+			NULL);
+	}
 }

src/lib/server/ClientListener.h

@@ -49,6 +49,8 @@ public:
 
 	//@}
 
+	void				deleteSocket(void* socket);
+
 	//! @name accessors
 	//@{
 
@@ -84,5 +86,5 @@ private:
 	Server*				m_server;
 	CryptoOptions		m_crypto;
 	IEventQueue*		m_events;
-	bool				m_useSecureSocket;
+	bool				m_useSecureNetwork;
 };

src/lib/server/PrimaryClient.h

@@ -146,6 +146,9 @@ public:
 	virtual void		sendDragInfo(UInt32 fileCount, const char* info, size_t size);
 	virtual void		fileChunkSending(UInt8 mark, char* data, size_t dataSize);
 
+	virtual synergy::IStream*
+						getStream() const { return NULL; }
+
 private:
 	synergy::Screen*	m_screen;
 	bool				m_clipboardDirty[kClipboardEnd];

src/lib/server/Server.cpp

@@ -21,6 +21,7 @@
 #include "server/ClientProxy.h"
 #include "server/ClientProxyUnknown.h"
 #include "server/PrimaryClient.h"
+#include "server/ClientListener.h"
 #include "synergy/IPlatformScreen.h"
 #include "synergy/DropHelper.h"
 #include "synergy/option_types.h"
@@ -30,6 +31,8 @@
 #include "synergy/FileChunker.h"
 #include "synergy/KeyState.h"
 #include "synergy/Screen.h"
+#include "synergy/PacketStreamFilter.h"
+#include "net/TCPSocket.h"
 #include "net/IDataSocket.h"
 #include "net/IListenSocket.h"
 #include "net/XSocket.h"
@@ -1358,7 +1361,11 @@ Server::handleClientDisconnected(const Event&, void* vclient)
 	BaseClientProxy* client = reinterpret_cast<BaseClientProxy*>(vclient);
 	removeActiveClient(client);
 	removeOldClient(client);
+
+	PacketStreamFilter* streamFileter = dynamic_cast<PacketStreamFilter*>(client->getStream());
+	TCPSocket* socket = dynamic_cast<TCPSocket*>(streamFileter->getStream());
 	delete client;
+	m_clientListener->deleteSocket(socket);
 }
 
 void

src/lib/server/Server.h

@@ -39,6 +39,7 @@ class InputFilter;
 namespace synergy { class Screen; }
 class IEventQueue;
 class Thread;
+class ClientListener;
 
 //! Synergy server
 /*!
@@ -155,6 +156,9 @@ public:
 	//! Received dragging information from client
 	void				dragInfoReceived(UInt32 fileNum, String content);
 
+	//! Store ClientListener pointer
+	void				setListener(ClientListener* p) { m_clientListener = p; }
+	
 	//@}
 	//! @name accessors
 	//@{
@@ -474,4 +478,6 @@ private:
 
 	Thread*				m_getDragInfoThread;
 	bool				m_waitDragInfoThread;
+
+	ClientListener*		m_clientListener;
 };

src/lib/synergy/ServerApp.cpp

@@ -543,6 +543,7 @@ ServerApp::startServer()
 		listener   = openClientListener(args().m_config->getSynergyAddress());
 		m_server   = openServer(*args().m_config, m_primaryClient);
 		listener->setServer(m_server);
+		m_server->setListener(listener);
 		m_listener = listener;
 		updateStatus();
 		LOG((CLOG_NOTE "started server, waiting for clients"));