Merge branch 'transport_failsafe' into restricted_routes

Config.cpp

@@ -124,6 +124,8 @@ namespace config {
       ("notransit", value<bool>()->zero_tokens()->default_value(false), "Router will not accept transit tunnels at startup")
       ("floodfill", value<bool>()->zero_tokens()->default_value(false), "Router will be floodfill")
       ("bandwidth", value<std::string>()->default_value(""), "Bandwidth limit: integer in kbps or letters: L (32), O (256), P (2048), X (>9000)")
+      ("ntcp", value<bool>()->zero_tokens()->default_value(true), "enable ntcp transport")
+      ("ssu", value<bool>()->zero_tokens()->default_value(true), "enable ssu transport")
 #ifdef _WIN32
       ("svcctl",    value<std::string>()->default_value(""),     "Windows service management ('install' or 'remove')")
       ("insomnia", value<bool>()->zero_tokens()->default_value(false), "Prevent system from sleeping")

Daemon.cpp

@@ -210,6 +210,26 @@ namespace i2p
 			
 		bool Daemon_Singleton::start()
 		{
+			LogPrint(eLogInfo, "Daemon: starting NetDB");
+			i2p::data::netdb.Start();
+
+#ifdef USE_UPNP
+			LogPrint(eLogInfo, "Daemon: starting UPnP");
+			d.m_UPnP.Start ();
+#endif
+      bool ntcp; i2p::config::GetOption("ntcp", ntcp);
+      bool ssu; i2p::config::GetOption("ssu", ssu);
+			LogPrint(eLogInfo, "Daemon: starting Transports");
+			i2p::transport::transports.Start(ntcp, ssu);
+			if (i2p::transport::transports.IsBoundNTCP() || i2p::transport::transports.IsBoundSSU()) {
+				LogPrint(eLogInfo, "Daemon: Transports started");
+			} else {
+				LogPrint(eLogError, "Daemon: failed to start Transports");
+				/** shut down netdb right away */
+				i2p::data::netdb.Stop();
+				return false;
+			}
+						
 			bool http; i2p::config::GetOption("http.enabled", http);
 			if (http) {
 				std::string httpAddr; i2p::config::GetOption("http.address", httpAddr);
@@ -219,15 +239,6 @@ namespace i2p
 				d.httpServer->Start();
 			}
 
-			LogPrint(eLogInfo, "Daemon: starting NetDB");
-			i2p::data::netdb.Start();
-
-#ifdef USE_UPNP
-			LogPrint(eLogInfo, "Daemon: starting UPnP");
-			d.m_UPnP.Start ();
-#endif			
-			LogPrint(eLogInfo, "Daemon: starting Transports");
-      i2p::transport::transports.Start();
 			
 			LogPrint(eLogInfo, "Daemon: starting Tunnels");
 			i2p::tunnel::tunnels.Start();
@@ -244,6 +255,7 @@ namespace i2p
 				d.m_I2PControlService = std::unique_ptr<i2p::client::I2PControlService>(new i2p::client::I2PControlService (i2pcpAddr, i2pcpPort));
 				d.m_I2PControlService->Start ();
 			}
+
 			return true;
 		}
 

HTTP.cpp

@@ -72,7 +72,11 @@ namespace http {
   bool URL::parse(const std::string& url) {
     std::size_t pos_p = 0; /* < current parse position */
     std::size_t pos_c = 0; /* < work position */
-    if (url.at(0) != '/') {
+    if (url.at(0) == '/' && url.find("/http://") == 0) {
+      /* special case for i2p.rocks inproxy */
+      pos_p ++;
+    }
+    if(url.at(0) != '/' || pos_p > 0) {
       /* schema */
       pos_c = url.find("://");
       if (pos_c != std::string::npos) {

I2CP.cpp

@@ -424,14 +424,25 @@ namespace client
 			if (m_Destination)
 			{
 				i2p::data::IdentityEx identity;
-				offset += identity.FromBuffer (buf + offset, len - offset);
+				size_t identsize = identity.FromBuffer (buf + offset, len - offset);
+        if (identsize)
+        {
+          offset += identsize;
           uint32_t payloadLen = bufbe32toh (buf + offset);
+          if (payloadLen + offset <= len)
+          {            
             offset += 4;
             uint32_t nonce = bufbe32toh (buf + offset + payloadLen);
             if (m_IsSendAccepted) 
               SendMessageStatusMessage (nonce, eI2CPMessageStatusAccepted); // accepted
             m_Destination->SendMsgTo (buf + offset, payloadLen, identity.GetIdentHash (), nonce);
           }
+          else
+            LogPrint(eLogError, "I2CP: cannot send message, too big");
+        }
+        else
+          LogPrint(eLogError, "I2CP: invalid identity");
+			} 
 		}	
 		else
 			LogPrint (eLogError, "I2CP: unexpected sessionID ", sessionID);

Makefile.linux

@@ -28,15 +28,15 @@ endif
 NEEDED_CXXFLAGS += -fPIC
 
 ifeq ($(USE_STATIC),yes)
-  LIBDIR := /usr/lib
+  #LIBDIR = /usr/lib
   LDLIBS  = $(LIBDIR)/libboost_system.a
   LDLIBS += $(LIBDIR)/libboost_date_time.a
   LDLIBS += $(LIBDIR)/libboost_filesystem.a
   LDLIBS += $(LIBDIR)/libboost_program_options.a
-  LDLIBS += $(LIBDIR)/libcrypto.a
   LDLIBS += $(LIBDIR)/libssl.a
+  LDLIBS += $(LIBDIR)/libcrypto.a
   LDLIBS += $(LIBDIR)/libz.a
-  LDLIBS += -lpthread -static-libstdc++ -static-libgcc
+  LDLIBS += -lpthread -static-libstdc++ -static-libgcc -lrt
   USE_AESNI := no
 else
   LDLIBS = -lcrypto -lssl -lz -lboost_system -lboost_date_time -lboost_filesystem -lboost_program_options -lpthread

NTCPSession.cpp

@@ -760,21 +760,33 @@ namespace transport
 			auto& addresses = context.GetRouterInfo ().GetAddresses ();
 			for (auto address: addresses)
 			{
-				if (address->transportStyle == i2p::data::RouterInfo::eTransportNTCP && address->host.is_v4 ())
+				if (address->transportStyle == i2p::data::RouterInfo::eTransportNTCP)
+				{
+					if (address->host.is_v4())
+					{
+						try
 						{
 							m_NTCPAcceptor = new boost::asio::ip::tcp::acceptor (m_Service,
 								boost::asio::ip::tcp::endpoint(boost::asio::ip::tcp::v4(), address->port));
+						} catch ( std::exception & ex ) {
+							/** fail to bind ip4 */
+							LogPrint(eLogError, "NTCP: Failed to bind to ip4 port ",address->port, ex.what());
+							continue;
+						}
 						
 						LogPrint (eLogInfo, "NTCP: Start listening TCP port ", address->port);
 						auto conn = std::make_shared<NTCPSession>(*this);
 						m_NTCPAcceptor->async_accept(conn->GetSocket (), std::bind (&NTCPServer::HandleAccept, this, 
 							conn, std::placeholders::_1));	
-				
-					if (context.SupportsV6 ())
+					}
+					else if (address->host.is_v6() && context.SupportsV6 ())
 					{
 						m_NTCPV6Acceptor = new boost::asio::ip::tcp::acceptor (m_Service);							
+						try
+						{
 							m_NTCPV6Acceptor->open (boost::asio::ip::tcp::v6());
 							m_NTCPV6Acceptor->set_option (boost::asio::ip::v6_only (true));
+							
 							m_NTCPV6Acceptor->bind (boost::asio::ip::tcp::endpoint(boost::asio::ip::tcp::v6(), address->port));
 							m_NTCPV6Acceptor->listen ();
 							
@@ -782,6 +794,10 @@ namespace transport
 							auto conn = std::make_shared<NTCPSession> (*this);
 							m_NTCPV6Acceptor->async_accept(conn->GetSocket (), std::bind (&NTCPServer::HandleAcceptV6,
 								this, conn, std::placeholders::_1));
+						} catch ( std::exception & ex ) {
+							LogPrint(eLogError, "NTCP: failed to bind to ip6 port ", address->port);
+							continue;
+						}
 					}	
 				}
 			}	
@@ -795,8 +811,10 @@ namespace transport
 		if (m_IsRunning)
 		{	
 			m_IsRunning = false;
+      if (m_NTCPAcceptor)
         delete m_NTCPAcceptor;
 			m_NTCPAcceptor = nullptr;
+      if (m_NTCPV6Acceptor)
         delete m_NTCPV6Acceptor;
 			m_NTCPV6Acceptor = nullptr;
 

NTCPSession.h

@@ -145,6 +145,9 @@ namespace transport
 			std::shared_ptr<NTCPSession> FindNTCPSession (const i2p::data::IdentHash& ident);
 			void Connect (const boost::asio::ip::address& address, int port, std::shared_ptr<NTCPSession> conn);
 
+      bool IsBoundV4() const { return m_NTCPAcceptor != nullptr; };
+      bool IsBoundV6() const { return m_NTCPV6Acceptor != nullptr; };
+      
 			boost::asio::io_service& GetService () { return m_Service; };
 			void Ban (const boost::asio::ip::address& addr);			
 

SAM.cpp

@@ -56,6 +56,7 @@ namespace client
 				if (m_Session)
 				{	
 					m_Session->DelSocket (shared_from_this ());
+					if (m_Session->localDestination)
 						m_Session->localDestination->StopAcceptingStreams ();
 				}
 				break;

Transports.cpp

@@ -105,7 +105,7 @@ namespace transport
 		Stop ();
 	}	
 
-	void Transports::Start ()
+	void Transports::Start (bool enableNTCP, bool enableSSU)
 	{
 		m_DHKeysPairSupplier.Start ();
 		m_IsRunning = true;
@@ -114,19 +114,33 @@ namespace transport
 		auto& addresses = context.GetRouterInfo ().GetAddresses ();
 		for (auto address : addresses)
 		{
-			if (!m_NTCPServer)
+			if (!m_NTCPServer && enableNTCP)
 			{
 				m_NTCPServer = new NTCPServer ();
 				m_NTCPServer->Start ();
+				if (!(m_NTCPServer->IsBoundV6() || m_NTCPServer->IsBoundV4())) {
+					/** failed to bind to NTCP */
+					LogPrint(eLogError, "Transports: failed to bind to TCP");
+					m_NTCPServer->Stop();
+					delete m_NTCPServer;
+					m_NTCPServer = nullptr;
+				}
 			}	
 			
 			if (address->transportStyle == RouterInfo::eTransportSSU && address->host.is_v4 ())
 			{
-				if (!m_SSUServer)
+				if (!m_SSUServer && enableSSU)
 				{	
 					m_SSUServer = new SSUServer (address->port);
 					LogPrint (eLogInfo, "Transports: Start listening UDP port ", address->port);
+					try {
 						m_SSUServer->Start ();
+					} catch ( std::exception & ex ) {
+						LogPrint(eLogError, "Transports: Failed to bind to UDP port", address->port);
+						delete m_SSUServer;
+						m_SSUServer = nullptr;
+						continue;
+					}
 					DetectExternalIP ();
 				}
 				else
@@ -288,7 +302,7 @@ namespace transport
 					}
 				}	
 				else
-					LogPrint (eLogWarning, "Transports: NTCP address is not present for ", i2p::data::GetIdentHashAbbreviation (ident), ", trying SSU");
+					LogPrint (eLogDebug, "Transports: NTCP address is not present for ", i2p::data::GetIdentHashAbbreviation (ident), ", trying SSU");
 			}
 			if (peer.numAttempts == 1)// SSU
 			{
@@ -458,6 +472,12 @@ namespace transport
 			LogPrint (eLogDebug, "Transports: SSU session closed");
 		}	
 		// TODO: delete NTCP
+		auto ntcpSession = m_NTCPServer ? m_NTCPServer->FindNTCPSession(router->GetIdentHash()) : nullptr;
+		if (ntcpSession) 
+		{
+			m_NTCPServer->RemoveNTCPSession(ntcpSession);
+			LogPrint(eLogDebug, "Transports: NTCP session closed");
+		}
 	}	
 		
 	void Transports::DetectExternalIP ()

Transports.h

@@ -73,9 +73,12 @@ namespace transport
 			Transports ();
 			~Transports ();
 
-			void Start ();
+			void Start (bool enableNTCP=true, bool enableSSU=true);
 			void Stop ();
 
+			bool IsBoundNTCP() const { return m_NTCPServer != nullptr; }
+			bool IsBoundSSU() const { return m_SSUServer != nullptr; }
+			
 			boost::asio::io_service& GetService () { return m_Service; };
 			std::shared_ptr<i2p::crypto::DHKeys> GetNextDHKeysPair ();	
 			void ReuseDHKeysPair (std::shared_ptr<i2p::crypto::DHKeys> pair);

Tunnel.cpp

@@ -642,7 +642,11 @@ namespace tunnel
 		{
 			// trying to create one more oubound tunnel
 			auto inboundTunnel = GetNextInboundTunnel ();
-			auto router = i2p::data::netdb.GetRandomRouter ();
+      std::shared_ptr<const i2p::data::RouterInfo> router(nullptr);
+      if (i2p::transport::transports.RoutesRestricted())
+        router = i2p::transport::transports.GetRestrictedPeer();
+      else
+        router = i2p::data::netdb.GetRandomRouter ();
 			if (!inboundTunnel || !router) return;
 			LogPrint (eLogDebug, "Tunnel: creating one hop outbound tunnel");
 			CreateTunnel<OutboundTunnel> (
@@ -704,7 +708,11 @@ namespace tunnel
 		if (m_OutboundTunnels.empty () || m_InboundTunnels.size () < 5) 
 		{
 			// trying to create one more inbound tunnel
-			auto router = i2p::data::netdb.GetRandomRouter ();
+      std::shared_ptr<const i2p::data::RouterInfo> router(nullptr);
+      if (i2p::transport::transports.RoutesRestricted())
+        router = i2p::transport::transports.GetRestrictedPeer();
+      else
+        router = i2p::data::netdb.GetRandomRouter ();
       if (!router) {
 				LogPrint (eLogWarning, "Tunnel: can't find any router, skip creating tunnel");
 				return;

TunnelPool.cpp

@@ -331,16 +331,12 @@ namespace tunnel
 		if (m_ExplicitPeers) return SelectExplicitPeers (peers, isInbound);
 		auto prevHop = i2p::context.GetSharedRouterInfo ();	
 		int numHops = isInbound ? m_NumInboundHops : m_NumOutboundHops;
-    int firstHop = numHops - 1;
-		if (i2p::transport::transports.GetNumPeers () > 25)
-		{
-      auto r = i2p::transport::transports.GetRandomPeer ();
-			if (r && !r->GetProfile ()->IsBad ())
+    if(i2p::transport::transports.RoutesRestricted())
     {
-				prevHop = r;
-				peers.push_back (r->GetRouterIdentity ());
-				numHops--;
-			}
+      auto hop = i2p::transport::transports.GetRestrictedPeer();
+      if(!hop) return false;
+      peers.push_back(hop->GetRouterIdentity());
+      prevHop = hop;
     }
     
 		for (int i = 0; i < numHops; i++)
@@ -354,13 +350,6 @@ namespace tunnel
 			prevHop = hop;
 			peers.push_back (hop->GetRouterIdentity ());
 		}
-    if(i2p::transport::transports.RoutesRestricted())
-    {
-      auto r = i2p::transport::transports.GetRestrictedPeer();
-      /* replace first hop with restricted router */
-      if(!r) return false;
-      peers[firstHop] = r->GetRouterIdentity();
-    }
 		return true;
 	}