implicit fallback update

libp2p/Peer.cpp

@@ -44,6 +44,7 @@ unsigned Peer::fallbackSeconds() const
 		return 30 * (m_failedAttempts + 1);
 	case UselessPeer:
 	case TooManyPeers:
+		return 25 * (m_failedAttempts + 1);
 	case ClientQuit:
 		return 15 * (m_failedAttempts + 1);
 	case NoDisconnect:

libp2p/Peer.h

@@ -75,6 +75,9 @@ public:
 	/// Reason peer was previously disconnected.
 	DisconnectReason lastDisconnect() const { return m_lastDisconnect; }
 	
+	/// Peer session is noted as useful.
+	void noteSessionGood() { m_failedAttempts = 0; }
+	
 protected:
 	/// Returns number of seconds to wait until attempting connection, based on attempted connection history.
 	unsigned fallbackSeconds() const;

libp2p/Session.cpp

@@ -358,8 +358,6 @@ void Session::drop(DisconnectReason _reason)
 		}
 		catch (...) {}
 
-	if (m_peer->m_lastDisconnect == NoDisconnect && (_reason == ClientQuit || _reason == DisconnectRequested))
-		m_peer->m_failedAttempts = 0;
 	m_peer->m_lastDisconnect = _reason;
 	if (_reason == BadProtocol)
 	{