single thread for I2CP

libi2pd/Config.cpp

@@ -152,6 +152,7 @@ namespace config {
 			("i2cp.enabled", value<bool>()->default_value(false),              "Enable or disable I2CP")
 			("i2cp.address", value<std::string>()->default_value("127.0.0.1"), "I2CP listen address")
 			("i2cp.port", value<uint16_t>()->default_value(7654),              "I2CP listen port")
+			("i2cp.singlethread", value<bool>()->default_value(true),          "Destinations run in the I2CP server's thread")
 		;
 
 		options_description i2pcontrol("I2PControl options");

libi2pd_client/ClientContext.cpp

@@ -102,10 +102,11 @@ namespace client
 		{
 			std::string i2cpAddr; i2p::config::GetOption("i2cp.address", i2cpAddr);
 			uint16_t i2cpPort; i2p::config::GetOption("i2cp.port", i2cpPort);
+			bool singleThread; i2p::config::GetOption("i2cp.singlethread", singleThread);
 			LogPrint(eLogInfo, "Clients: starting I2CP at ", i2cpAddr, ":", i2cpPort);
 			try
 			{
-				m_I2CPServer = new I2CPServer (i2cpAddr, i2cpPort);
+				m_I2CPServer = new I2CPServer (i2cpAddr, i2cpPort, singleThread);
 				m_I2CPServer->Start ();
 			}
 			catch (std::exception& e)

libi2pd_client/I2CP.cpp

@@ -23,36 +23,13 @@ namespace i2p
 namespace client
 {
 
-	I2CPDestination::I2CPDestination (std::shared_ptr<I2CPSession> owner, std::shared_ptr<const i2p::data::IdentityEx> identity, bool isPublic, const std::map<std::string, std::string>& params):
-		RunnableService ("I2CP"), LeaseSetDestination (GetIOService (), isPublic, &params),
+	I2CPDestination::I2CPDestination (boost::asio::io_service& service, std::shared_ptr<I2CPSession> owner, 
+	    std::shared_ptr<const i2p::data::IdentityEx> identity, bool isPublic, const std::map<std::string, std::string>& params):
+		LeaseSetDestination (service, isPublic, &params),
 		m_Owner (owner), m_Identity (identity), m_EncryptionKeyType (m_Identity->GetCryptoKeyType ())
 	{
 	}
 
-	I2CPDestination::~I2CPDestination ()
-	{
-		if (IsRunning ())
-			Stop ();
-	}
-
-	void I2CPDestination::Start ()
-	{
-		if (!IsRunning ())
-		{
-			LeaseSetDestination::Start ();
-			StartIOService ();
-		}
-	}
-
-	void I2CPDestination::Stop ()
-	{
-		if (IsRunning ())
-		{
-			LeaseSetDestination::Stop ();
-			StopIOService ();
-		}
-	}
-
 	void I2CPDestination::SetEncryptionPrivateKey (const uint8_t * key)
 	{
 		m_Decryptor = i2p::data::PrivateKeys::CreateDecryptor (m_Identity->GetCryptoKeyType (), key);
@@ -217,6 +194,37 @@ namespace client
 		}
 	}
 
+	RunnableI2CPDestination::RunnableI2CPDestination (std::shared_ptr<I2CPSession> owner, 
+		std::shared_ptr<const i2p::data::IdentityEx> identity, bool isPublic, const std::map<std::string, std::string>& params):
+		RunnableService ("I2CP"),
+		I2CPDestination (GetIOService (), owner, identity, isPublic, params)
+	{
+	}	
+
+	RunnableI2CPDestination::~RunnableI2CPDestination ()
+	{
+		if (IsRunning ())
+			Stop ();
+	}	
+
+	void RunnableI2CPDestination::Start ()
+	{
+		if (!IsRunning ())
+		{
+			I2CPDestination::Start ();
+			StartIOService ();
+		}
+	}
+
+	void RunnableI2CPDestination::Stop ()
+	{
+		if (IsRunning ())
+		{
+			I2CPDestination::Stop ();
+			StopIOService ();
+		}
+	}
+		
 	I2CPSession::I2CPSession (I2CPServer& owner, std::shared_ptr<proto::socket> socket):
 		m_Owner (owner), m_Socket (socket), m_Payload (nullptr),
 		m_SessionID (0xFFFF), m_MessageID (0), m_IsSendAccepted (true)
@@ -451,7 +459,9 @@ namespace client
 			if (params[I2CP_PARAM_DONT_PUBLISH_LEASESET] == "true") isPublic = false;
 			if (!m_Destination)
 			{
-				m_Destination = std::make_shared<I2CPDestination>(shared_from_this (), identity, isPublic, params);
+				m_Destination = m_Owner.IsSingleThread () ?
+					std::make_shared<I2CPDestination>(m_Owner.GetService (), shared_from_this (), identity, isPublic, params):
+					std::make_shared<RunnableI2CPDestination>(shared_from_this (), identity, isPublic, params);
 				SendSessionStatusMessage (1); // created
 				LogPrint (eLogDebug, "I2CP: session ", m_SessionID, " created");
 				m_Destination->Start ();
@@ -800,9 +810,9 @@ namespace client
 			std::placeholders::_1, std::placeholders::_2, buf));
 	}
 
-	I2CPServer::I2CPServer (const std::string& interface, int port):
-		m_IsRunning (false), m_Thread (nullptr),
-		m_Acceptor (m_Service,
+	I2CPServer::I2CPServer (const std::string& interface, int port, bool isSingleThread):
+		RunnableService ("I2CP"), m_IsSingleThread (isSingleThread),
+		m_Acceptor (GetIOService (),
 #ifdef ANDROID
 			I2CPSession::proto::endpoint(std::string (1, '\0') + interface)) // leading 0 for abstract address
 #else
@@ -825,20 +835,18 @@ namespace client
 
 	I2CPServer::~I2CPServer ()
 	{
-		if (m_IsRunning)
+		if (IsRunning ())
 			Stop ();
 	}
 
 	void I2CPServer::Start ()
 	{
 		Accept ();
-		m_IsRunning = true;
-		m_Thread = new std::thread (std::bind (&I2CPServer::Run, this));
+		StartIOService ();
 	}
 
 	void I2CPServer::Stop ()
 	{
-		m_IsRunning = false;
 		m_Acceptor.cancel ();
 		{
 			auto sessions = m_Sessions;
@@ -846,33 +854,12 @@ namespace client
 				it.second->Stop ();
 		}
 		m_Sessions.clear ();
-		m_Service.stop ();
-		if (m_Thread)
-		{
-			m_Thread->join ();
-			delete m_Thread;
-			m_Thread = nullptr;
-		}
-	}
-
-	void I2CPServer::Run ()
-	{
-		while (m_IsRunning)
-		{
-			try
-			{
-				m_Service.run ();
-			}
-			catch (std::exception& ex)
-			{
-				LogPrint (eLogError, "I2CP: runtime exception: ", ex.what ());
-			}
-		}
+		StopIOService ();
 	}
 
 	void I2CPServer::Accept ()
 	{
-		auto newSocket = std::make_shared<I2CPSession::proto::socket> (m_Service);
+		auto newSocket = std::make_shared<I2CPSession::proto::socket> (GetIOService ());
 		m_Acceptor.async_accept (*newSocket, std::bind (&I2CPServer::HandleAccept, this,
 			std::placeholders::_1, newSocket));
 	}

libi2pd_client/I2CP.h

@@ -63,16 +63,14 @@ namespace client
 	const char I2CP_PARAM_MESSAGE_RELIABILITY[] = "i2cp.messageReliability";
 
 	class I2CPSession;
-	class I2CPDestination: private i2p::util::RunnableService, public LeaseSetDestination
+	class I2CPDestination: public LeaseSetDestination
 	{
 		public:
 
-			I2CPDestination (std::shared_ptr<I2CPSession> owner, std::shared_ptr<const i2p::data::IdentityEx> identity, bool isPublic, const std::map<std::string, std::string>& params);
-			~I2CPDestination ();
-
-			void Start ();
-			void Stop ();
-
+			I2CPDestination (boost::asio::io_service& service, std::shared_ptr<I2CPSession> owner, 
+				std::shared_ptr<const i2p::data::IdentityEx> identity, bool isPublic, const std::map<std::string, std::string>& params);
+			~I2CPDestination () {};
+			
 			void SetEncryptionPrivateKey (const uint8_t * key);
 			void SetEncryptionType (i2p::data::CryptoKeyType keyType) { m_EncryptionKeyType = keyType; };
 			void SetECIESx25519EncryptionPrivateKey (const uint8_t * key);
@@ -109,6 +107,18 @@ namespace client
 			uint64_t m_LeaseSetExpirationTime;
 	};
 
+	class RunnableI2CPDestination: private i2p::util::RunnableService, public I2CPDestination 
+	{
+		public:
+
+			RunnableI2CPDestination (std::shared_ptr<I2CPSession> owner, std::shared_ptr<const i2p::data::IdentityEx> identity, 
+				bool isPublic, const std::map<std::string, std::string>& params);	
+			~RunnableI2CPDestination ();
+
+			void Start ();
+			void Stop ();
+	};	
+	
 	class I2CPServer;
 	class I2CPSession: public std::enable_shared_from_this<I2CPSession>
 	{
@@ -179,17 +189,18 @@ namespace client
 	};
 	typedef void (I2CPSession::*I2CPMessageHandler)(const uint8_t * buf, size_t len);
 
-	class I2CPServer
+	class I2CPServer: private i2p::util::RunnableService
 	{
 		public:
 
-			I2CPServer (const std::string& interface, int port);
+			I2CPServer (const std::string& interface, int port, bool isSingleThread);
 			~I2CPServer ();
 
 			void Start ();
 			void Stop ();
-			boost::asio::io_service& GetService () { return m_Service; };
-
+			boost::asio::io_service& GetService () { return GetIOService (); };
+			bool IsSingleThread () const { return m_IsSingleThread; };
+			
 			bool InsertSession (std::shared_ptr<I2CPSession> session);
 			void RemoveSession (uint16_t sessionID);
 
@@ -203,12 +214,10 @@ namespace client
 
 		private:
 
+			bool m_IsSingleThread;
 			I2CPMessageHandler m_MessagesHandlers[256];
 			std::map<uint16_t, std::shared_ptr<I2CPSession> > m_Sessions;
 
-			bool m_IsRunning;
-			std::thread * m_Thread;
-			boost::asio::io_service m_Service;
 			I2CPSession::proto::acceptor m_Acceptor;
 
 		public: