send error codes on transport conn and stream failures

Author: sukunrt

p2p/net/swarm/swarm.go

@@ -385,8 +385,12 @@ func (s *Swarm) addConn(tc transport.CapableConn, dir network.Direction) (*Conn,
 	// If we do this in the Upgrader, we will not be able to do this.
 	if s.gater != nil {
 		if allow, _ := s.gater.InterceptUpgraded(c); !allow {
-			// TODO Send disconnect with reason here
-			err := tc.Close()
+			var err error
+			if tcc, ok := tc.(network.CloseWithErrorer); ok {
+				err = tcc.CloseWithError(network.ConnGated)
+			} else {
+				err = tc.Close()
+			}
 			if err != nil {
 				log.Warnf("failed to close connection with peer %s and addr %s; err: %s", p, addr, err)
 			}

p2p/net/swarm/swarm_conn.go

@@ -138,7 +138,11 @@ func (c *Conn) start() {
 			}
 			scope, err := c.swarm.ResourceManager().OpenStream(c.RemotePeer(), network.DirInbound)
 			if err != nil {
-				ts.Reset()
+				if tse, ok := ts.(network.ResetWithErrorer); ok {
+					tse.ResetWithError(network.StreamResourceLimitExceeded)
+				} else {
+					ts.Reset()
+				}
 				continue
 			}
 			c.swarm.refs.Add(1)

p2p/net/upgrader/listener.go

@@ -162,7 +162,11 @@ func (l *listener) handleIncoming() {
 				// if we stop accepting connections for some reason,
 				// we'll eventually close all the open ones
 				// instead of hanging onto them.
-				conn.Close()
+				if cc, ok := conn.(network.CloseWithErrorer); ok {
+					cc.CloseWithError(network.ConnRateLimited)
+				} else {
+					conn.Close()
+				}
 			}
 		}()
 	}

p2p/transport/quic/listener.go

@@ -11,7 +11,6 @@ import (
 	tpt "github.com/libp2p/go-libp2p/core/transport"
 	p2ptls "github.com/libp2p/go-libp2p/p2p/security/tls"
 	"github.com/libp2p/go-libp2p/p2p/transport/quicreuse"
-
 	ma "github.com/multiformats/go-multiaddr"
 	"github.com/quic-go/quic-go"
 )
@@ -54,12 +53,12 @@ func (l *listener) Accept() (tpt.CapableConn, error) {
 		c, err := l.wrapConn(qconn)
 		if err != nil {
 			log.Debugf("failed to setup connection: %s", err)
-			qconn.CloseWithError(1, "")
+			qconn.CloseWithError(quic.ApplicationErrorCode(network.ConnResourceLimitExceeded), "")
 			continue
 		}
 		l.transport.addConn(qconn, c)
 		if l.transport.gater != nil && !(l.transport.gater.InterceptAccept(c) && l.transport.gater.InterceptSecured(network.DirInbound, c.remotePeerID, c)) {
-			c.closeWithError(errorCodeConnectionGating, "connection gated")
+			c.closeWithError(quic.ApplicationErrorCode(network.ConnGated), "connection gated")
 			continue
 		}
 

p2p/transport/quic/transport.go

@@ -34,8 +34,6 @@ var ErrHolePunching = errors.New("hole punching attempted; no active dial")
 
 var HolePunchTimeout = 5 * time.Second
 
-const errorCodeConnectionGating = 0x47415445 // GATE in ASCII
-
 // The Transport implements the tpt.Transport interface for QUIC connections.
 type transport struct {
 	privKey     ic.PrivKey
@@ -169,7 +167,7 @@ func (t *transport) dialWithScope(ctx context.Context, raddr ma.Multiaddr, p pee
 		remoteMultiaddr: raddr,
 	}
 	if t.gater != nil && !t.gater.InterceptSecured(network.DirOutbound, p, c) {
-		pconn.CloseWithError(errorCodeConnectionGating, "connection gated")
+		pconn.CloseWithError(quic.ApplicationErrorCode(network.ConnGated), "connection gated")
 		return nil, fmt.Errorf("secured connection gated")
 	}
 	t.addConn(pconn, c)

p2p/transport/quic/virtuallistener.go

@@ -3,6 +3,7 @@ package libp2pquic
 import (
 	"sync"
 
+	"github.com/libp2p/go-libp2p/core/network"
 	tpt "github.com/libp2p/go-libp2p/core/transport"
 	"github.com/libp2p/go-libp2p/p2p/transport/quicreuse"
 
@@ -142,8 +143,8 @@ func (r *acceptLoopRunner) innerAccept(l *listener, expectedVersion quic.Version
 	select {
 	case ch <- acceptVal{conn: conn}:
 	default:
+		conn.(network.CloseWithErrorer).CloseWithError(network.ConnRateLimited)
 		// accept queue filled up, drop the connection
-		conn.Close()
 		log.Warn("Accept queue filled. Dropping connection.")
 	}
 

p2p/transport/quicreuse/listener.go

@@ -10,6 +10,7 @@ import (
 	"strings"
 	"sync"
 
+	"github.com/libp2p/go-libp2p/core/network"
 	"github.com/libp2p/go-libp2p/core/transport"
 	ma "github.com/multiformats/go-multiaddr"
 	"github.com/quic-go/quic-go"
@@ -212,7 +213,7 @@ func (l *listener) Close() error {
 		close(l.queue)
 		// drain the queue
 		for conn := range l.queue {
-			conn.CloseWithError(1, "closing")
+			conn.CloseWithError(quic.ApplicationErrorCode(network.ConnShutdown), "closing")
 		}
 	})
 	return nil