delete expired LeaseSets

LeaseSet.cpp

@@ -12,14 +12,16 @@ namespace i2p
 namespace data
 {
 	
-	LeaseSet::LeaseSet (const uint8_t * buf, int len)
+	LeaseSet::LeaseSet (const uint8_t * buf, int len, bool unsolicited): 
+		m_IsUnsolicited (unsolicited)
 	{
 		memcpy (m_Buffer, buf, len);
 		m_BufferLen = len;
 		ReadFromBuffer ();
 	}
 
-	LeaseSet::LeaseSet (const i2p::tunnel::TunnelPool& pool)
+	LeaseSet::LeaseSet (const i2p::tunnel::TunnelPool& pool):
+		m_IsUnsolicited (false)
 	{
 		m_BufferLen = 0;	
 		// header

LeaseSet.h

@@ -49,7 +49,7 @@ namespace data
 	{
 		public:
 
-			LeaseSet (const uint8_t * buf, int len);
+			LeaseSet (const uint8_t * buf, int len, bool unsolicited = false);
 			LeaseSet (const LeaseSet& ) = default;
 			LeaseSet (const i2p::tunnel::TunnelPool& pool);
 			LeaseSet& operator=(const LeaseSet& ) = default;
@@ -58,6 +58,9 @@ namespace data
 			const uint8_t * GetBuffer () const { return m_Buffer; };
 			size_t GetBufferLen () const { return m_BufferLen; };	
 
+			bool IsUnsolicited () const { return m_IsUnsolicited; };
+			void SetUnsolicited (bool unsolicited) { m_IsUnsolicited = unsolicited; };
+
 			// implements RoutingDestination
 			const Identity& GetIdentity () const { return m_Identity; };
 			const IdentHash& GetIdentHash () const { return m_IdentHash; };
@@ -80,6 +83,7 @@ namespace data
 			uint8_t m_EncryptionKey[256];
 			uint8_t m_Buffer[MAX_LS_BUFFER_SIZE];
 			size_t m_BufferLen;
+			bool m_IsUnsolicited;
 	};	
 }		
 }	

NetDb.cpp

@@ -135,11 +135,12 @@ namespace data
 				}	
 
 				uint64_t ts = i2p::util::GetSecondsSinceEpoch ();
-				if (ts - lastSave >= 60) // save routers and validate subscriptions every minute
+				if (ts - lastSave >= 60) // save routers, manage leasesets and validate subscriptions every minute
 				{
 					if (lastSave)
 					{
 						SaveUpdated (m_NetDbPath);
+						ManageLeaseSets ();
 						ValidateSubscriptions ();
 					}	
 					lastSave = ts;
@@ -185,7 +186,7 @@ namespace data
 
 	void NetDb::AddLeaseSet (const IdentHash& ident, uint8_t * buf, int len)
 	{
-		DeleteRequestedDestination (ident);
+		bool unsolicited = !DeleteRequestedDestination (ident);
 		auto it = m_LeaseSets.find(ident);
 		if (it != m_LeaseSets.end ())
 		{
@@ -195,7 +196,7 @@ namespace data
 		else
 		{	
 			LogPrint ("New LeaseSet added");
-			m_LeaseSets[ident] = new LeaseSet (buf, len);
+			m_LeaseSets[ident] = new LeaseSet (buf, len, unsolicited);
 		}	
 	}	
 
@@ -586,19 +587,27 @@ namespace data
 		} 
 
 		I2NPMessage * replyMsg = nullptr;
+
+		{
 			auto router = FindRouter (buf);
 			if (router)
 			{
-			LogPrint ("Requested ", key, " found");
+				LogPrint ("Requested RouterInfo ", key, " found");
 				router->LoadBuffer ();
-			if (!router->GetBuffer ()) router = nullptr;
+				if (router->GetBuffer ()) 
+					replyMsg = CreateDatabaseStoreMsg (router);
 			}
-		if (router)
+		}
+		if (!replyMsg)
 		{
-			replyMsg = CreateDatabaseStoreMsg (router);
+			auto leaseSet = FindLeaseSet (buf);
-			excluded += numExcluded*32; // we don't care about exluded
+			if (leaseSet && leaseSet->IsUnsolicited ()) // we don't send back our LeaseSets
+			{
+				LogPrint ("Requested LeaseSet ", key, " found");
+				replyMsg = CreateDatabaseStoreMsg (leaseSet);
 			}
-		else
+		}
+		if (!replyMsg)
 		{
 			LogPrint ("Requested ", key, " not found. ", numExcluded, " excluded");
 			std::set<IdentHash> excludedRouters;
@@ -610,6 +619,9 @@ namespace data
 			}	
 			replyMsg = CreateDatabaseSearchReply (buf, GetClosestFloodfill (buf, excludedRouters));
 		}
+		else
+			excluded += numExcluded*32; // we don't care about exluded	
+
 		if (replyMsg)
 		{	
 			if (replyTunnelID)
@@ -721,14 +733,16 @@ namespace data
 			return it->second;
 	}
 	
-	void NetDb::DeleteRequestedDestination (const IdentHash& dest)
+	bool NetDb::DeleteRequestedDestination (const IdentHash& dest)
 	{
 		auto it = m_RequestedDestinations.find (dest);
 		if (it != m_RequestedDestinations.end ())
 		{	
 			delete it->second;
 			m_RequestedDestinations.erase (it);
+			return true;
 		}	
+		return false;
 	}	
 
 	void NetDb::DeleteRequestedDestination (RequestedDestination * dest)
@@ -799,6 +813,8 @@ namespace data
 			LogPrint ("LeaseSet requested");	
 			RequestDestination (ident, true);
 		}
+		else
+			leaseSet->SetUnsolicited (false);
 		m_Subscriptions.insert (ident);
 	}
 		
@@ -827,5 +843,20 @@ namespace data
 		LogPrint ("Keyspace rotation complete");	
 		Publish ();
 	}
+
+	void NetDb::ManageLeaseSets ()
+	{
+		for (auto it = m_LeaseSets.begin (); it != m_LeaseSets.end ();)
+		{
+			if (it->second->IsUnsolicited () && !it->second->HasNonExpiredLeases ()) // all leases expired
+			{
+				LogPrint ("LeaseSet ", it->second->GetIdentHash ().ToBase64 (), " expired");
+				delete it->second;
+				it = m_LeaseSets.erase (it);
+			}	
+			else 
+				it++;
+		}
+	}
 }
 }

NetDb.h

@@ -92,10 +92,11 @@ namespace data
 			void ValidateSubscriptions ();
 			const RouterInfo * GetClosestFloodfill (const IdentHash& destination, const std::set<IdentHash>& excluded) const;
 			void KeyspaceRotation ();
+			void ManageLeaseSets ();
 
 			RequestedDestination * CreateRequestedDestination (const IdentHash& dest, 
 				bool isLeaseSet, bool isExploratory = false);
-			void DeleteRequestedDestination (const IdentHash& dest);
+			bool DeleteRequestedDestination (const IdentHash& dest); // returns true if found
 			void DeleteRequestedDestination (RequestedDestination * dest);
 		
 		private: