tunnels reload changes: fix tcp tunnels reload

Signed-off-by: R4SAS <r4sas@i2pmail.org>

libi2pd_client/ClientContext.cpp

@@ -185,7 +185,7 @@ namespace client
 		LogPrint(eLogInfo, "Clients: stopping AddressBook");
 		m_AddressBook.Stop ();
 
-	{
+		{
 			std::lock_guard<std::mutex> lock(m_ForwardsMutex);
 			m_ServerForwards.clear();
 			m_ClientForwards.clear();
@@ -200,6 +200,8 @@ namespace client
 		for (auto& it: m_Destinations)
 			it.second->Stop ();
 		m_Destinations.clear ();
+
+		m_SharedLocalDestination->Release ();
 		m_SharedLocalDestination = nullptr;
 	}
 
@@ -209,14 +211,6 @@ namespace client
 		/*std::string config; i2p::config::GetOption("conf", config);
 		i2p::config::ParseConfig(config);*/
 
-		// handle tunnels
-		// reset isUpdated for each tunnel
-		VisitTunnels ([](I2PService * s)->bool { s->isUpdated = false; return true; });
-		// reload tunnels
-		ReadTunnels();
-		// delete not updated tunnels (not in config anymore)
-		VisitTunnels ([](I2PService * s)->bool { return s->isUpdated; });
-
 		// change shared local destination
 		m_SharedLocalDestination->Release ();
 		CreateNewSharedLocalDestination ();
@@ -225,6 +219,7 @@ namespace client
 		if (m_HttpProxy)
 		{
 			m_HttpProxy->Stop ();
+			delete m_HttpProxy;
 			m_HttpProxy = nullptr;
 		}
 		ReadHttpProxy ();
@@ -233,10 +228,19 @@ namespace client
 		if (m_SocksProxy)
 		{
 			m_SocksProxy->Stop ();
+			delete m_SocksProxy;
 			m_SocksProxy = nullptr;
 		}
 		ReadSocksProxy ();
 
+		// handle tunnels
+		// reset isUpdated for each tunnel
+		VisitTunnels (false);
+		// reload tunnels
+		ReadTunnels();
+		// delete not updated tunnels (not in config anymore)
+		VisitTunnels (true);
+
 		// delete unused destinations
 		std::unique_lock<std::mutex> l(m_DestinationsMutex);
 		for (auto it = m_Destinations.begin (); it != m_Destinations.end ();)
@@ -504,20 +508,15 @@ namespace client
 		int numClientTunnels = 0, numServerTunnels = 0;
 		std::string tunConf; i2p::config::GetOption("tunconf", tunConf);
 		if (tunConf.empty ())
-		{
-			// TODO: cleanup this in 2.8.0
-			tunConf = i2p::fs::DataDirPath ("tunnels.cfg");
-			if (i2p::fs::Exists(tunConf))
-				LogPrint(eLogWarning, "Clients: please rename tunnels.cfg -> tunnels.conf here: ", tunConf);
-			else
-				tunConf = i2p::fs::DataDirPath ("tunnels.conf");
-		}
+			tunConf = i2p::fs::DataDirPath ("tunnels.conf");
+
 		LogPrint(eLogDebug, "Clients: tunnels config file: ", tunConf);
 		ReadTunnels (tunConf, numClientTunnels, numServerTunnels);
 
 		std::string tunDir; i2p::config::GetOption("tunnelsdir", tunDir);
 		if (tunDir.empty ())
 			tunDir = i2p::fs::DataDirPath ("tunnels.d");
+
 		if (i2p::fs::Exists (tunDir))
 		{
 			std::vector<std::string> files;
@@ -582,7 +581,7 @@ namespace client
 						if (it != destinations.end ())
 							localDestination = it->second;
 						else
-						{	
+						{
 							i2p::data::PrivateKeys k;
 							if(LoadPrivateKeys (k, keys, sigType, cryptoType))
 							{
@@ -597,7 +596,7 @@ namespace client
 										destinations[keys] = localDestination;
 								}
 							}
-						}	
+						}
 					}
 
 					if (type == I2P_TUNNELS_SECTION_TYPE_UDPCLIENT) {
@@ -609,10 +608,18 @@ namespace client
 
 						bool gzip = section.second.get (I2P_CLIENT_TUNNEL_GZIP, true);
 						auto clientTunnel = std::make_shared<I2PUDPClientTunnel>(name, dest, end, localDestination, destinationPort, gzip);
-						if(m_ClientForwards.insert(std::make_pair(end, clientTunnel)).second)
+
+						auto ins = m_ClientForwards.insert(std::make_pair(end, clientTunnel));
+						if (ins.second)
+						{
 							clientTunnel->Start();
+							numClientTunnels++;
+						}
 						else
+						{
+							ins.first->second->isUpdated = true;
 							LogPrint(eLogError, "Clients: I2P Client forward for endpoint ", end, " already exists");
+						}
 
 					} else {
 						boost::asio::ip::tcp::endpoint clientEndpoint;
@@ -666,13 +673,16 @@ namespace client
 							if (ins.first->second->GetLocalDestination () != clientTunnel->GetLocalDestination ())
 							{
 								LogPrint (eLogInfo, "Clients: I2P client tunnel destination updated");
+								ins.first->second->Stop ();
 								ins.first->second->SetLocalDestination (clientTunnel->GetLocalDestination ());
+								ins.first->second->Start ();
 							}
 							ins.first->second->isUpdated = true;
 							LogPrint (eLogInfo, "Clients: I2P client tunnel for endpoint ", clientEndpoint, " already exists");
 						}
 					}
 				}
+
 				else if (type == I2P_TUNNELS_SECTION_TYPE_SERVER
 					|| type == I2P_TUNNELS_SECTION_TYPE_HTTP
 					|| type == I2P_TUNNELS_SECTION_TYPE_IRC
@@ -705,17 +715,17 @@ namespace client
 					if (it != destinations.end ())
 						localDestination = it->second;
 					else
-					{	
+					{
 						i2p::data::PrivateKeys k;
 						if(!LoadPrivateKeys (k, keys, sigType, cryptoType))
 							continue;
 						localDestination = FindLocalDestination (k.GetPublic ()->GetIdentHash ());
 						if (!localDestination)
-						{	
+						{
 							localDestination = CreateNewLocalDestination (k, true, &options);
 							destinations[keys] = localDestination;
-						}	
-					}	
+						}
+					}
 					if (type == I2P_TUNNELS_SECTION_TYPE_UDPSERVER)
 					{
 						// udp server tunnel
@@ -727,8 +737,8 @@ namespace client
 								address = "::1";
 							else
 								address = "127.0.0.1";
-						}	
-						auto localAddress = boost::asio::ip::address::from_string(address);	
+						}
+						auto localAddress = boost::asio::ip::address::from_string(address);
 						auto serverTunnel = std::make_shared<I2PUDPServerTunnel>(name, localDestination, localAddress, endpoint, port, gzip);
 						if(!isUniqueLocal)
 						{
@@ -736,16 +746,16 @@ namespace client
 							serverTunnel->SetUniqueLocal(isUniqueLocal);
 						}
 						std::lock_guard<std::mutex> lock(m_ForwardsMutex);
-						if(m_ServerForwards.insert(
-							std::make_pair(
-								std::make_pair(
-									localDestination->GetIdentHash(), port),
-								serverTunnel)).second)
+						auto ins = m_ServerForwards.insert(std::make_pair(
+							std::make_pair(localDestination->GetIdentHash(), port),
+							serverTunnel));
+						if (ins.second)
 						{
 							serverTunnel->Start();
 							LogPrint(eLogInfo, "Clients: I2P Server Forward created for UDP Endpoint ", host, ":", port, " bound on ", address, " for ",localDestination->GetIdentHash().ToBase32());
 						}
 						else
+							ins.first->second->isUpdated = true;
 							LogPrint(eLogError, "Clients: I2P Server Forward for destination/port ", m_AddressBook.ToAddress(localDestination->GetIdentHash()), "/", port, "already exists");
 
 						continue;
@@ -795,7 +805,9 @@ namespace client
 						if (ins.first->second->GetLocalDestination () != serverTunnel->GetLocalDestination ())
 						{
 							LogPrint (eLogInfo, "Clients: I2P server tunnel destination updated");
+							ins.first->second->Stop ();
 							ins.first->second->SetLocalDestination (serverTunnel->GetLocalDestination ());
+							ins.first->second->Start ();
 						}
 						ins.first->second->isUpdated = true;
 						LogPrint (eLogInfo, "Clients: I2P server tunnel for destination/port ", m_AddressBook.ToAddress(localDestination->GetIdentHash ()), "/", inPort, " already exists");
@@ -872,7 +884,7 @@ namespace client
 			{
 				localDestination = m_HttpProxy->GetLocalDestination ();
 				localDestination->Acquire ();
-			}	
+			}
 			else if (socksProxyKeys.length () > 0)
 			{
 				i2p::data::PrivateKeys keys;
@@ -920,27 +932,51 @@ namespace client
 		}
 	}
 
-	template<typename Container, typename Visitor>
-	void VisitTunnelsContainer (Container& c, Visitor v)
+	void ClientContext::VisitTunnels (bool clean)
 	{
-		for (auto it = c.begin (); it != c.end ();)
+		for (auto it = m_ClientTunnels.begin (); it != m_ClientTunnels.end ();)
 		{
-			if (!v (it->second.get ()))
-			{
+			if(clean && !it->second->isUpdated) {
 				it->second->Stop ();
-				it = c.erase (it);
+				it = m_ClientTunnels.erase(it);
+			} else {
+				it->second->isUpdated = false;
+				it++;
 			}
-			else
+		}
+
+		for (auto it = m_ServerTunnels.begin (); it != m_ServerTunnels.end ();)
+		{
+			if(clean && !it->second->isUpdated) {
+				it->second->Stop ();
+				it = m_ServerTunnels.erase(it);
+			} else {
+				it->second->isUpdated = false;
 				it++;
+			}
 		}
-	}
 
-	template<typename Visitor>
-	void ClientContext::VisitTunnels (Visitor v)
-	{
-		VisitTunnelsContainer (m_ClientTunnels, v);
-		VisitTunnelsContainer (m_ServerTunnels, v);
-		// TODO: implement UDP forwards
+		for (auto it = m_ClientForwards.begin (); it != m_ClientForwards.end ();)
+		{
+			if(clean && !it->second->isUpdated) {
+				it->second = nullptr;
+				it = m_ClientForwards.erase(it);
+			} else {
+				it->second->isUpdated = false;
+				it++;
+			}
+		}
+
+		for (auto it = m_ServerForwards.begin (); it != m_ServerForwards.end ();)
+		{
+			if(clean && !it->second->isUpdated) {
+				it->second = nullptr;
+				it = m_ServerForwards.erase(it);
+			} else {
+				it->second->isUpdated = false;
+				it++;
+			}
+		}
 	}
 }
 }

libi2pd_client/ClientContext.h

@@ -121,8 +121,7 @@ namespace client
 			void CleanupUDP(const boost::system::error_code & ecode);
 			void ScheduleCleanupUDP();
 
-			template<typename Visitor>
-			void VisitTunnels (Visitor v); // Visitor: (I2PService *) -> bool, true means retain
+			void VisitTunnels (bool clean);
 
 			void CreateNewSharedLocalDestination ();
 			void AddLocalDestination (std::shared_ptr<ClientDestination> localDestination);

libi2pd_client/I2PTunnel.cpp

@@ -303,7 +303,7 @@ namespace client
 							m_ProxyConnectionSent = true;
 						}
 						else
-							m_OutHeader << line << "\n";
+						m_OutHeader << line << "\n";
 					}
 				}
 				else
@@ -888,7 +888,8 @@ namespace client
 		LogPrint(eLogInfo, "UDPServer: done");
 	}
 
-	void I2PUDPServerTunnel::Start() {
+	void I2PUDPServerTunnel::Start()
+	{
 		m_LocalDest->Start();
 	}
 
@@ -1064,8 +1065,9 @@ namespace client
 		else
 			LogPrint(eLogWarning, "UDP Client: not tracking udp session using port ", (int) toPort);
 	}
-		
-	I2PUDPClientTunnel::~I2PUDPClientTunnel() {
+
+	I2PUDPClientTunnel::~I2PUDPClientTunnel()
+	{
 		auto dgram = m_LocalDest->GetDatagramDestination();
 		if (dgram) dgram->ResetReceiver();
 

libi2pd_client/I2PTunnel.h

@@ -254,6 +254,10 @@ namespace client
 			std::vector<UDPSessionPtr> m_Sessions;
 			std::shared_ptr<i2p::client::ClientDestination> m_LocalDest;
 			UDPSessionPtr m_LastSession;
+
+		public:
+
+			bool isUpdated; // transient, used during reload only
 	};
 
 	class I2PUDPClientTunnel
@@ -283,7 +287,7 @@ namespace client
 			void TryResolving();
 
 		private:
-			
+
 			const std::string m_Name;
 			std::mutex m_SessionsMutex;
 			std::unordered_map<uint16_t, std::shared_ptr<UDPConvo> > m_Sessions; // maps i2p port -> local udp convo
@@ -298,6 +302,10 @@ namespace client
 			uint16_t RemotePort, m_LastPort;
 			bool m_cancel_resolve;
 			std::shared_ptr<UDPConvo> m_LastSession;
+
+		public:
+
+			bool isUpdated; // transient, used during reload only
 	};
 
 	class I2PServerTunnel: public I2PService