connect to introducer if not any yet

NetDb.cpp

@@ -894,6 +894,15 @@ namespace data
 			});
 	}
 
+	std::shared_ptr<const RouterInfo> NetDb::GetRandomIntroducer () const
+	{
+		return GetRandomRouter (
+			[](std::shared_ptr<const RouterInfo> router)->bool 
+			{ 
+				return !router->IsHidden () && router->IsIntroducer (); 
+			});
+	}	
+	
 	std::shared_ptr<const RouterInfo> NetDb::GetHighBandwidthRandomRouter (std::shared_ptr<const RouterInfo> compatibleWith) const
 	{
 		return GetRandomRouter (

NetDb.h

@@ -81,6 +81,7 @@ namespace data
 			std::shared_ptr<const RouterInfo> GetRandomRouter (std::shared_ptr<const RouterInfo> compatibleWith) const;
 			std::shared_ptr<const RouterInfo> GetHighBandwidthRandomRouter (std::shared_ptr<const RouterInfo> compatibleWith) const;
 			std::shared_ptr<const RouterInfo> GetRandomPeerTestRouter () const;
+			std::shared_ptr<const RouterInfo> GetRandomIntroducer () const;
 			std::shared_ptr<const RouterInfo> GetClosestFloodfill (const IdentHash& destination, const std::set<IdentHash>& excluded) const;
 			std::shared_ptr<const RouterInfo> GetClosestNonFloodfill (const IdentHash& destination, const std::set<IdentHash>& excluded) const;
 			void SetUnreachable (const IdentHash& ident, bool unreachable);			

SSU.cpp

@@ -3,6 +3,7 @@
 #include "Log.h"
 #include "Timestamp.h"
 #include "RouterContext.h"
+#include "NetDb.h"
 #include "SSU.h"
 
 namespace i2p
@@ -460,6 +461,12 @@ namespace transport
 				}	
 			}	
 			m_Introducers = newList;
+			if (m_Introducers.empty ())
+			{
+				auto introducer = i2p::data::netdb.GetRandomIntroducer ();
+				if (introducer)
+					GetSession (introducer);
+			}	
 			ScheduleIntroducersUpdateTimer ();
 		}	
 	}