30 seconds timeout for exploratory requests

libi2pd/NetDbRequests.cpp

@@ -181,6 +181,8 @@ namespace data
 		{
 			auto& dest = it->second;
 			bool done = false;
+			if (!dest->IsExploratory ())
+			{	
 				if (ts < dest->GetCreationTime () + MAX_REQUEST_TIME) // request becomes worthless
 				{
 					if (ts > dest->GetLastRequestTime () + MIN_REQUEST_TIME) // try next floodfill if no response after min interval
@@ -188,6 +190,9 @@ namespace data
 				}
 				else // delete obsolete request
 					done = true;
+			}	
+			else if (ts >= dest->GetCreationTime () + MAX_EXPLORATORY_REQUEST_TIME)
+				done = true;
 
 			if (done)
 				it = m_RequestedDestinations.erase (it);

libi2pd/NetDbRequests.h

@@ -24,6 +24,7 @@ namespace data
 	const uint64_t MANAGE_REQUESTS_INTERVAL = 1; // in seconds
 	const uint64_t MIN_REQUEST_TIME = 5; // in seconds
 	const uint64_t MAX_REQUEST_TIME = MAX_NUM_REQUEST_ATTEMPTS * (MIN_REQUEST_TIME + MANAGE_REQUESTS_INTERVAL);
+	const uint64_t MAX_EXPLORATORY_REQUEST_TIME = 30; // in seconds
 	
 	class RequestedDestination
 	{