From c4d5ef59580881062bc9936df41c9a5b9c7113c6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=B8=96=E7=95=8C?= <i@sekai.icu>
Date: Thu, 25 Apr 2024 22:16:13 +0800
Subject: [PATCH] dialer: Allow nil router

---
 common/dialer/default.go | 14 ++++++++++----
 common/dialer/dialer.go  |  3 +++
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/common/dialer/default.go b/common/dialer/default.go
index 91af85c5..4fbad07d 100644
--- a/common/dialer/default.go
+++ b/common/dialer/default.go
@@ -32,14 +32,20 @@ func NewDefault(router adapter.Router, options option.DialerOptions) (*DefaultDi
 	var dialer net.Dialer
 	var listener net.ListenConfig
 	if options.BindInterface != "" {
-		bindFunc := control.BindToInterface(router.InterfaceFinder(), options.BindInterface, -1)
+		var interfaceFinder control.InterfaceFinder
+		if router != nil {
+			interfaceFinder = router.InterfaceFinder()
+		} else {
+			interfaceFinder = control.NewDefaultInterfaceFinder()
+		}
+		bindFunc := control.BindToInterface(interfaceFinder, options.BindInterface, -1)
 		dialer.Control = control.Append(dialer.Control, bindFunc)
 		listener.Control = control.Append(listener.Control, bindFunc)
-	} else if router.AutoDetectInterface() {
+	} else if router != nil && router.AutoDetectInterface() {
 		bindFunc := router.AutoDetectInterfaceFunc()
 		dialer.Control = control.Append(dialer.Control, bindFunc)
 		listener.Control = control.Append(listener.Control, bindFunc)
-	} else if router.DefaultInterface() != "" {
+	} else if router != nil && router.DefaultInterface() != "" {
 		bindFunc := control.BindToInterface(router.InterfaceFinder(), router.DefaultInterface(), -1)
 		dialer.Control = control.Append(dialer.Control, bindFunc)
 		listener.Control = control.Append(listener.Control, bindFunc)
@@ -47,7 +53,7 @@ func NewDefault(router adapter.Router, options option.DialerOptions) (*DefaultDi
 	if options.RoutingMark != 0 {
 		dialer.Control = control.Append(dialer.Control, control.RoutingMark(options.RoutingMark))
 		listener.Control = control.Append(listener.Control, control.RoutingMark(options.RoutingMark))
-	} else if router.DefaultMark() != 0 {
+	} else if router != nil && router.DefaultMark() != 0 {
 		dialer.Control = control.Append(dialer.Control, control.RoutingMark(router.DefaultMark()))
 		listener.Control = control.Append(listener.Control, control.RoutingMark(router.DefaultMark()))
 	}
diff --git a/common/dialer/dialer.go b/common/dialer/dialer.go
index bbb4b3a9..a1721b28 100644
--- a/common/dialer/dialer.go
+++ b/common/dialer/dialer.go
@@ -13,6 +13,9 @@ func New(router adapter.Router, options option.DialerOptions) (N.Dialer, error)
 	if options.IsWireGuardListener {
 		return NewDefault(router, options)
 	}
+	if router == nil {
+		return NewDefault(nil, options)
+	}
 	var (
 		dialer N.Dialer
 		err    error