Merge pull request #383 from PurpleI2P/openssl

recent changes

Destination.cpp

@@ -140,7 +140,7 @@ namespace client
 			m_IsRunning = true;
 			m_Pool->SetLocalDestination (shared_from_this ());
 			m_Pool->SetActive (true);			
-			m_Thread = new std::thread (std::bind (&ClientDestination::Run, this));
+			m_Thread = new std::thread (std::bind (&ClientDestination::Run, shared_from_this ()));
 			m_StreamingDestination = std::make_shared<i2p::stream::StreamingDestination> (shared_from_this ()); // TODO:
 			m_StreamingDestination->Start ();	
 			for (auto it: m_StreamingDestinationsByPorts)
@@ -148,7 +148,7 @@ namespace client
 			
 			m_CleanupTimer.expires_from_now (boost::posix_time::minutes (DESTINATION_CLEANUP_TIMEOUT));
 			m_CleanupTimer.async_wait (std::bind (&ClientDestination::HandleCleanupTimer,
-				this, std::placeholders::_1));
+				shared_from_this (), std::placeholders::_1));
 		}	
 	}
 		
@@ -229,21 +229,22 @@ namespace client
 		} data;	
 		memcpy (data.k, key, 32);
 		memcpy (data.t, tag, 32);
-		m_Service.post ([this,data](void)
+		auto s = shared_from_this ();
+		m_Service.post ([s,data](void)
 			{
-				this->AddSessionKey (data.k, data.t);
+				s->AddSessionKey (data.k, data.t);
 			});
 		return true;
 	}
 
 	void ClientDestination::ProcessGarlicMessage (std::shared_ptr<I2NPMessage> msg)
 	{
-		m_Service.post (std::bind (&ClientDestination::HandleGarlicMessage, this, msg)); 
+		m_Service.post (std::bind (&ClientDestination::HandleGarlicMessage, shared_from_this (), msg)); 
 	}
 
 	void ClientDestination::ProcessDeliveryStatusMessage (std::shared_ptr<I2NPMessage> msg)
 	{
-		m_Service.post (std::bind (&ClientDestination::HandleDeliveryStatusMessage, this, msg)); 
+		m_Service.post (std::bind (&ClientDestination::HandleDeliveryStatusMessage, shared_from_this (), msg)); 
 	}
 
 	void ClientDestination::HandleI2NPMessage (const uint8_t * buf, size_t len, std::shared_ptr<i2p::tunnel::InboundTunnel> from)
@@ -286,6 +287,8 @@ namespace client
 			if (it != m_RemoteLeaseSets.end ())
 			{
 				leaseSet = it->second;
+				if (leaseSet->IsNewer (buf + offset, len - offset))
+				{	
 					leaseSet->Update (buf + offset, len - offset); 
 					if (leaseSet->IsValid ())
 						LogPrint (eLogDebug, "Remote LeaseSet updated");
@@ -296,6 +299,9 @@ namespace client
 						leaseSet = nullptr;
 					}
 				}
+				else
+					LogPrint (eLogDebug, "Remote LeaseSet is older. Not updated");
+			}
 			else
 			{	
 				leaseSet = std::make_shared<i2p::data::LeaseSet> (buf + offset, len - offset);

LeaseSet.cpp

@@ -48,6 +48,7 @@ namespace data
 		m_Buffer[m_BufferLen] = tunnels.size (); // num leases
 		m_BufferLen++;
 		// leases
+		auto currentTime = i2p::util::GetMillisecondsSinceEpoch ();
 		for (auto it: tunnels)
 		{	
 			memcpy (m_Buffer + m_BufferLen, it->GetNextIdentHash (), 32);
@@ -56,8 +57,9 @@ namespace data
 			m_BufferLen += 4; // tunnel id
 			uint64_t ts = it->GetCreationTime () + i2p::tunnel::TUNNEL_EXPIRATION_TIMEOUT - i2p::tunnel::TUNNEL_EXPIRATION_THRESHOLD; // 1 minute before expiration
 			ts *= 1000; // in milliseconds
-			ts += rand () % 6; // + random milliseconds 0-5
 			if (ts > m_ExpirationTime) m_ExpirationTime = ts;
+			// make sure leaseset is newer than previous, but adding some time to expiration date
+			ts += (currentTime - it->GetCreationTime ()*1000LL)*2/i2p::tunnel::TUNNEL_EXPIRATION_TIMEOUT; // up to 2 secs
 			htobe64buf (m_Buffer + m_BufferLen, ts);
 			m_BufferLen += 8; // end date
 		}
@@ -183,6 +185,34 @@ namespace data
 		}
 	}				
 
+	uint64_t LeaseSet::ExtractTimestamp (const uint8_t * buf, size_t len) const 
+	{
+		if (!m_Identity) return 0;
+		size_t size = m_Identity->GetFullLen ();
+		if (size > len) return 0;
+		size += 256; // encryption key
+		size += m_Identity->GetSigningPublicKeyLen (); // unused signing key
+		if (size > len) return 0;
+		uint8_t num = buf[size];
+		size++; // num
+		if (size + num*44 > len) return 0;
+		uint64_t timestamp= 0 ;
+		for (int i = 0; i < num; i++)
+		{
+			size += 36; // gateway (32) + tunnelId(4)
+			auto endDate = bufbe64toh (buf + size); 
+			size += 8; // end date
+			if (!timestamp || endDate < timestamp)
+				timestamp = endDate;
+		}	
+		return timestamp;
+	}	
+
+	bool LeaseSet::IsNewer (const uint8_t * buf, size_t len) const
+	{
+		return ExtractTimestamp (buf, len) > ExtractTimestamp (m_Buffer, m_BufferLen);
+	}	
+		
 	const std::vector<std::shared_ptr<const Lease> > LeaseSet::GetNonExpiredLeases (bool withThreshold) const
 	{
 		auto ts = i2p::util::GetMillisecondsSinceEpoch ();

LeaseSet.h

@@ -47,6 +47,7 @@ namespace data
 			LeaseSet (std::shared_ptr<const i2p::tunnel::TunnelPool> pool);
 			~LeaseSet () { delete[] m_Buffer; };
 			void Update (const uint8_t * buf, size_t len);
+			bool IsNewer (const uint8_t * buf, size_t len) const;
 			void PopulateLeases (); // from buffer
 			std::shared_ptr<const IdentityEx> GetIdentity () const { return m_Identity; };			
 
@@ -69,6 +70,7 @@ namespace data
 		private:
 
 			void ReadFromBuffer (bool readIdentity = true);
+			uint64_t ExtractTimestamp (const uint8_t * buf, size_t len) const; // min expiration time
 			
 		private:
 

NetDb.cpp

@@ -149,24 +149,32 @@ namespace data
 		}	
 	}	
 	
-	void NetDb::AddRouterInfo (const uint8_t * buf, int len)
+	bool NetDb::AddRouterInfo (const uint8_t * buf, int len)
 	{
 		IdentityEx identity;
 		if (identity.FromBuffer (buf, len))
-			AddRouterInfo (identity.GetIdentHash (), buf, len);	
+			return AddRouterInfo (identity.GetIdentHash (), buf, len);	
+		return false;
 	}
 
-	void NetDb::AddRouterInfo (const IdentHash& ident, const uint8_t * buf, int len)
+	bool NetDb::AddRouterInfo (const IdentHash& ident, const uint8_t * buf, int len)
 	{	
+		bool updated = true;	
 		auto r = FindRouter (ident);
 		if (r)
 		{
-			auto ts = r->GetTimestamp ();
+			if (r->IsNewer (buf, len))
+			{
 				r->Update (buf, len);
-			if (r->GetTimestamp () > ts)
 				LogPrint (eLogInfo, "NetDb: RouterInfo updated: ", ident.ToBase64());
 			}
 			else
+			{
+				LogPrint (eLogDebug, "NetDb: RouterInfo is older: ", ident.ToBase64());
+				updated = false;
+			}
+		}	
+		else	
 		{	
 			r = std::make_shared<RouterInfo> (buf, len);
 			if (!r->IsUnreachable ())
@@ -182,28 +190,40 @@ namespace data
 					m_Floodfills.push_back (r);
 				}
 			}	
+			else
+				updated = false;
 		}	
 		// take care about requested destination
 		m_Requests.RequestComplete (ident, r);
+		return updated;
 	}	
 
-	void NetDb::AddLeaseSet (const IdentHash& ident, const uint8_t * buf, int len,
+	bool NetDb::AddLeaseSet (const IdentHash& ident, const uint8_t * buf, int len,
 		std::shared_ptr<i2p::tunnel::InboundTunnel> from)
 	{
+		bool updated = false;
 		if (!from) // unsolicited LS must be received directly
 		{	
 			auto it = m_LeaseSets.find(ident);
 			if (it != m_LeaseSets.end ())
+			{
+				if (it->second->IsNewer (buf, len))
 				{
 					it->second->Update (buf, len); 
 					if (it->second->IsValid ())
+					{
 						LogPrint (eLogInfo, "NetDb: LeaseSet updated: ", ident.ToBase64());
+						updated = true;	
+					}
 					else
 					{
 						LogPrint (eLogWarning, "NetDb: LeaseSet update failed: ", ident.ToBase64());
 						m_LeaseSets.erase (it);
 					}	
 				}
+				else
+					LogPrint (eLogDebug, "NetDb: LeaseSet is older: ", ident.ToBase64());
+			}
 			else
 			{	
 				auto leaseSet = std::make_shared<LeaseSet> (buf, len, false); // we don't need leases in netdb 
@@ -211,11 +231,13 @@ namespace data
 				{
 					LogPrint (eLogInfo, "NetDb: LeaseSet added: ", ident.ToBase64());
 					m_LeaseSets[ident] = leaseSet;
+					updated = true;
 				}
 				else
 					LogPrint (eLogError, "NetDb: new LeaseSet validation failed: ", ident.ToBase64());
 			}	
 		}	
+		return updated;
 	}	
 
 	std::shared_ptr<RouterInfo> NetDb::FindRouter (const IdentHash& ident) const
@@ -487,24 +509,48 @@ namespace data
 					LogPrint (eLogError, "NetDb: no outbound tunnels for DatabaseStore reply found");
 			}		
 			offset += 32;
+		}
+		size_t payloadOffset = offset;		
+
+		bool updated = false;
+		if (buf[DATABASE_STORE_TYPE_OFFSET]) // type
+		{
+			LogPrint (eLogDebug, "NetDb: store request: LeaseSet");
+			updated = AddLeaseSet (ident, buf + offset, len - offset, m->from);
+		}	
+		else
+		{
+			LogPrint (eLogDebug, "NetDb: store request: RouterInfo");
+			size_t size = bufbe16toh (buf + offset);
+			offset += 2;
+			if (size > 2048 || size > len - offset)
+			{
+				LogPrint (eLogError, "NetDb: invalid RouterInfo length ", (int)size);
+				return;
+			}	
+			uint8_t uncompressed[2048];
+			size_t uncompressedSize = m_Inflator.Inflate (buf + offset, size, uncompressed, 2048);
+			if (uncompressedSize)
+				updated = AddRouterInfo (ident, uncompressed, uncompressedSize);
+		}	
 
-			if (context.IsFloodfill ())
+		if (replyToken && context.IsFloodfill () && updated)
 		{
-				// flood it
+			// flood updated
 			auto floodMsg = NewI2NPShortMessage ();
 			uint8_t * payload = floodMsg->GetPayload ();		
 			memcpy (payload, buf, 33); // key + type
 			htobe32buf (payload + DATABASE_STORE_REPLY_TOKEN_OFFSET, 0); // zero reply token
-				auto msgLen = len - offset;
+			auto msgLen = len - payloadOffset;
 			floodMsg->len += DATABASE_STORE_HEADER_SIZE + msgLen;
 			if (floodMsg->len < floodMsg->maxLen)
 			{	
-					memcpy (payload + DATABASE_STORE_HEADER_SIZE, buf + offset, msgLen);
+				memcpy (payload + DATABASE_STORE_HEADER_SIZE, buf + payloadOffset, msgLen);
 				floodMsg->FillI2NPMessageHeader (eI2NPDatabaseStore); 
 				std::set<IdentHash> excluded;
 				for (int i = 0; i < 3; i++)
 				{
-						auto floodfill = GetClosestFloodfill (ident, excluded, true); // we need a floodfill close than us only
+					auto floodfill = GetClosestFloodfill (ident, excluded);
 					if (floodfill)
 						transports.SendMessage (floodfill->GetIdentHash (), floodMsg);
 					else
@@ -516,28 +562,6 @@ namespace data
 		}	
 	}	
 
-		if (buf[DATABASE_STORE_TYPE_OFFSET]) // type
-		{
-			LogPrint (eLogDebug, "NetDb: store request: LeaseSet");
-			AddLeaseSet (ident, buf + offset, len - offset, m->from);
-		}	
-		else
-		{
-			LogPrint (eLogDebug, "NetDb: store request: RouterInfo");
-			size_t size = bufbe16toh (buf + offset);
-			offset += 2;
-			if (size > 2048 || size > len - offset)
-			{
-				LogPrint (eLogError, "NetDb: invalid RouterInfo length ", (int)size);
-				return;
-			}	
-			uint8_t uncompressed[2048];
-			size_t uncompressedSize = m_Inflator.Inflate (buf + offset, size, uncompressed, 2048);
-			if (uncompressedSize)
-				AddRouterInfo (ident, uncompressed, uncompressedSize);
-		}	
-	}	
-
 	void NetDb::HandleDatabaseSearchReplyMsg (std::shared_ptr<const I2NPMessage> msg)
 	{
 		const uint8_t * buf = msg->GetPayload ();

NetDb.h

@@ -34,9 +34,9 @@ namespace data
 			void Start ();
 			void Stop ();
 			
-			void AddRouterInfo (const uint8_t * buf, int len);
-			void AddRouterInfo (const IdentHash& ident, const uint8_t * buf, int len);
-			void AddLeaseSet (const IdentHash& ident, const uint8_t * buf, int len, std::shared_ptr<i2p::tunnel::InboundTunnel> from);
+			bool AddRouterInfo (const uint8_t * buf, int len);
+			bool AddRouterInfo (const IdentHash& ident, const uint8_t * buf, int len);
+			bool AddLeaseSet (const IdentHash& ident, const uint8_t * buf, int len, std::shared_ptr<i2p::tunnel::InboundTunnel> from);
 			std::shared_ptr<RouterInfo> FindRouter (const IdentHash& ident) const;
 			std::shared_ptr<LeaseSet> FindLeaseSet (const IdentHash& destination) const;
 			std::shared_ptr<RouterProfile> FindRouterProfile (const IdentHash& ident) const;

RouterInfo.cpp

@@ -459,6 +459,14 @@ namespace data
 		s.write (properties.str ().c_str (), properties.str ().size ());
 	}	
 
+	bool RouterInfo::IsNewer (const uint8_t * buf, size_t len) const
+	{
+		if (!m_RouterIdentity) return false;
+		size_t size = m_RouterIdentity->GetFullLen ();
+		if (size + 8 > len) return false;
+		return bufbe64toh (buf + size) > m_Timestamp; 
+	}
+
 	const uint8_t * RouterInfo::LoadBuffer ()
 	{
 		if (!m_Buffer)

RouterInfo.h

@@ -157,6 +157,7 @@ namespace data
 			
 			void Update (const uint8_t * buf, int len);
 			void DeleteBuffer () { delete[] m_Buffer; m_Buffer = nullptr; };
+			bool IsNewer (const uint8_t * buf, size_t len) const;			
 
 			// implements RoutingDestination
 			const IdentHash& GetIdentHash () const { return m_RouterIdentity->GetIdentHash (); };

TunnelPool.cpp

@@ -201,7 +201,14 @@ namespace tunnel
 
 	void TunnelPool::TestTunnels ()
 	{
-		for (auto it: m_Tests)
+		decltype(m_Tests) tests;
+		{
+			std::unique_lock<std::mutex> l(m_TestsMutex);
+			tests = m_Tests;
+			m_Tests.clear ();
+		}
+
+		for (auto it: tests)
 		{
 			LogPrint (eLogWarning, "Tunnels: test of tunnel ", it.first, " failed");
 			// if test failed again with another tunnel we consider it failed
@@ -232,7 +239,7 @@ namespace tunnel
 					it.second.second->SetState (eTunnelStateTestFailed);
 			}	
 		}
-		m_Tests.clear ();
+	
 		// new tests	
 		auto it1 = m_OutboundTunnels.begin ();
 		auto it2 = m_InboundTunnels.begin ();
@@ -253,7 +260,10 @@ namespace tunnel
 			{
  				uint32_t msgID;
 				RAND_bytes ((uint8_t *)&msgID, 4);
+				{
+					std::unique_lock<std::mutex> l(m_TestsMutex);
  					m_Tests[msgID] = std::make_pair (*it1, *it2);
+				}
  				(*it1)->SendTunnelDataMsg ((*it2)->GetNextIdentHash (), (*it2)->GetNextTunnelID (),
 					CreateDeliveryStatusMsg (msgID));
 				it1++; it2++;
@@ -276,17 +286,27 @@ namespace tunnel
 		buf += 4;	
 		uint64_t timestamp = bufbe64toh (buf);
 
+		decltype(m_Tests)::mapped_type test;
+		bool found = false;	
+		{
+			std::unique_lock<std::mutex> l(m_TestsMutex);
 			auto it = m_Tests.find (msgID);
 			if (it != m_Tests.end ())
 			{
-			// restore from test failed state if any
-			if (it->second.first->GetState () == eTunnelStateTestFailed)
-				it->second.first->SetState (eTunnelStateEstablished);
-			if (it->second.second->GetState () == eTunnelStateTestFailed)
-				it->second.second->SetState (eTunnelStateEstablished);
-			LogPrint (eLogDebug, "Tunnels: test of ", it->first, " successful. ", i2p::util::GetMillisecondsSinceEpoch () - timestamp, " milliseconds");
+				found = true;
+				test = it->second; 
 				m_Tests.erase (it);
 			}
+		}
+		if (found)
+		{
+			// restore from test failed state if any
+			if (test.first->GetState () == eTunnelStateTestFailed)
+				test.first->SetState (eTunnelStateEstablished);
+			if (test.second->GetState () == eTunnelStateTestFailed)
+				test.second->SetState (eTunnelStateEstablished);
+			LogPrint (eLogDebug, "Tunnels: test of ", msgID, " successful. ", i2p::util::GetMillisecondsSinceEpoch () - timestamp, " milliseconds");
+		}
 		else
 		{
 			if (m_LocalDestination)

TunnelPool.h

@@ -77,6 +77,7 @@ namespace tunnel
 			std::set<std::shared_ptr<InboundTunnel>, TunnelCreationTimeCmp> m_InboundTunnels; // recent tunnel appears first
 			mutable std::mutex m_OutboundTunnelsMutex;
 			std::set<std::shared_ptr<OutboundTunnel>, TunnelCreationTimeCmp> m_OutboundTunnels;
+			mutable std::mutex m_TestsMutex;
 			std::map<uint32_t, std::pair<std::shared_ptr<OutboundTunnel>, std::shared_ptr<InboundTunnel> > > m_Tests;
 			bool m_IsActive;