return ssl alert unrecognized_name when https domain not registered (#3620)

pkg/util/vhost/vhost.go

@@ -46,6 +46,7 @@ type (
 	authFunc        func(conn net.Conn, username, password string, reqInfoMap map[string]string) (bool, error)
 	hostRewriteFunc func(net.Conn, string) (net.Conn, error)
 	successHookFunc func(net.Conn, map[string]string) error
+	failHookFunc    func(net.Conn)
 )
 
 // Muxer is a functional component used for https and tcpmux proxies.
@@ -58,6 +59,7 @@ type Muxer struct {
 	vhostFunc      muxFunc
 	checkAuth      authFunc
 	successHook    successHookFunc
+	failHook       failHookFunc
 	rewriteHost    hostRewriteFunc
 	registryRouter *Routers
 }
@@ -87,6 +89,11 @@ func (v *Muxer) SetSuccessHookFunc(f successHookFunc) *Muxer {
 	return v
 }
 
+func (v *Muxer) SetFailHookFunc(f failHookFunc) *Muxer {
+	v.failHook = f
+	return v
+}
+
 func (v *Muxer) SetRewriteHostFunc(f hostRewriteFunc) *Muxer {
 	v.rewriteHost = f
 	return v
@@ -206,13 +213,8 @@ func (v *Muxer) handle(c net.Conn) {
 	httpUser := reqInfoMap["HTTPUser"]
 	l, ok := v.getListener(name, path, httpUser)
 	if !ok {
-		res := notFoundResponse()
-		if res.Body != nil {
-			defer res.Body.Close()
-		}
-		_ = res.Write(c)
 		log.Debug("http request for host [%s] path [%s] httpUser [%s] not found", name, path, httpUser)
-		_ = c.Close()
+		v.failHook(sConn)
 		return
 	}