add reload and plugin support for hop

listener/obfs/http/listener.go

@@ -1,6 +1,7 @@
 package http
 
 import (
+	"context"
 	"net"
 	"time"
 
@@ -48,7 +49,13 @@ func (l *obfsListener) 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
 	}

listener/obfs/http/metadata.go

@@ -9,6 +9,7 @@ import (
 
 type metadata struct {
 	header http.Header
+	mptcp  bool
 }
 
 func (l *obfsListener) parseMetadata(md mdata.Metadata) (err error) {
@@ -23,5 +24,7 @@ func (l *obfsListener) parseMetadata(md mdata.Metadata) (err error) {
 		}
 		l.md.header = hd
 	}
+
+	l.md.mptcp = mdutil.GetBool(md, "mptcp")
 	return
 }