add reload and plugin support for hop

listener/sshd/listener.go

@@ -62,7 +62,13 @@ func (l *sshdListener) Init(md md.Metadata) (err error) {
 	if xnet.IsIPv4(l.options.Addr) {
 		network = "tcp4"
 	}
-	ln, err := net.Listen(network, l.options.Addr)
+
+	lc := net.ListenConfig{}
+	if l.md.mptcp {
+		lc.SetMultipathTCP(true)
+		l.logger.Debugf("mptcp enabled: %v", lc.MultipathTCP())
+	}
+	ln, err := lc.Listen(context.Background(), network, l.options.Addr)
 	if err != nil {
 		return err
 	}

listener/sshd/metadata.go

@@ -17,6 +17,7 @@ type metadata struct {
 	signer         ssh.Signer
 	authorizedKeys map[string]bool
 	backlog        int
+	mptcp          bool
 }
 
 func (l *sshdListener) parseMetadata(md mdata.Metadata) (err error) {
@@ -64,5 +65,6 @@ func (l *sshdListener) parseMetadata(md mdata.Metadata) (err error) {
 		l.md.backlog = defaultBacklog
 	}
 
+	l.md.mptcp = mdutil.GetBool(md, "mptcp")
 	return
 }