Merge pull request #44 from ipfs/fix/dial-read-deadline

add a read deadline for the multistream select on dial

p2p/net/conn/dial.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"math/rand"
 	"strings"
+	"time"
 
 	ci "github.com/ipfs/go-libp2p-crypto"
 	lgbl "github.com/ipfs/go-libp2p-loggables"
@@ -68,12 +69,16 @@ func (d *Dialer) Dial(ctx context.Context, raddr ma.Multiaddr, remote peer.ID) (
 			cryptoProtoChoice = NoEncryptionTag
 		}
 
+		maconn.SetReadDeadline(time.Now().Add(NegotiateReadTimeout))
+
 		err = msmux.SelectProtoOrFail(cryptoProtoChoice, maconn)
 		if err != nil {
 			errOut = err
 			return
 		}
 
+		maconn.SetReadDeadline(time.Time{})
+
 		c, err := newSingleConn(ctx, d.LocalPeer, remote, maconn)
 		if err != nil {
 			maconn.Close()