don't reply with relay tag if we are not on introducer on that address

libi2pd/SSU2Session.cpp

@@ -1656,10 +1656,14 @@ namespace transport
 				case eSSU2BlkRelayTagRequest:
 					LogPrint (eLogDebug, "SSU2: RelayTagRequest");
 					if (!m_RelayTag)
+					{
+						auto addr = FindLocalAddress ();
+						if (addr && addr->IsIntroducer ())
 						{	
 							RAND_bytes ((uint8_t *)&m_RelayTag, 4);
 							m_Server.AddRelay (m_RelayTag, shared_from_this ());
 						}	
+					}
 				break;
 				case eSSU2BlkRelayTag:
 					LogPrint (eLogDebug, "SSU2: RelayTag");
@@ -2478,6 +2482,8 @@ namespace transport
 	{
 		if (m_Address)
 			return i2p::context.GetRouterInfo ().GetSSU2Address (m_Address->IsV4 ());
+		else if (!m_RemoteEndpoint.address ().is_unspecified ())
+			return i2p::context.GetRouterInfo ().GetSSU2Address (m_RemoteEndpoint.address ().is_v4 ());
 		return nullptr;
 	}