p2p/net/swarm: configurable timeout for tests

net/swarm/swarm.go

@@ -4,6 +4,7 @@ package swarm
 
 import (
 	"fmt"
+	"time"
 
 	inet "github.com/jbenet/go-ipfs/p2p/net"
 	addrutil "github.com/jbenet/go-ipfs/p2p/net/swarm/addr"
@@ -32,8 +33,10 @@ type Swarm struct {
 	local peer.ID
 	peers peer.Peerstore
 	connh ConnHandler
+
 	dsync dialsync
 	backf dialbackoff
+	dialT time.Duration // mainly for tests
 
 	cg ctxgroup.ContextGroup
 }
@@ -55,6 +58,7 @@ func NewSwarm(ctx context.Context, listenAddrs []ma.Multiaddr,
 		local: local,
 		peers: peers,
 		cg:    ctxgroup.WithContext(ctx),
+		dialT: DialTimeout,
 	}
 
 	// configure Swarm

net/swarm/swarm_dial.go

@@ -210,7 +210,7 @@ func (s *Swarm) Dial(ctx context.Context, p peer.ID) (*Conn, error) {
 		// ok, we have been charged to dial! let's do it.
 		// if it succeeds, dial will add the conn to the swarm itself.
 		log.Debugf("dial start")
-		ctxT, _ := context.WithTimeout(ctx, DialTimeout)
+		ctxT, _ := context.WithTimeout(ctx, s.dialT)
 		conn, err = s.dial(ctxT, p)
 		s.dsync.Unlock(p)
 		log.Debugf("dial end %s", conn)
@@ -264,7 +264,7 @@ func (s *Swarm) dial(ctx context.Context, p peer.ID) (*Conn, error) {
 	d := &conn.Dialer{
 		Dialer: manet.Dialer{
 			Dialer: net.Dialer{
-				Timeout: DialTimeout,
+				Timeout: s.dialT,
 			},
 		},
 		LocalPeer:  s.local,