From a9709d2a574ab2083b95226f3df26329312c8752 Mon Sep 17 00:00:00 2001
From: mzz2017 <2017@duck.com>
Date: Mon, 27 Feb 2023 14:57:00 +0800
Subject: [PATCH] optimize: allow to bind nothing

---
 cmd/run.go               | 2 +-
 control/bpf_utils.go     | 2 --
 control/control_plane.go | 2 --
 3 files changed, 1 insertion(+), 5 deletions(-)

diff --git a/cmd/run.go b/cmd/run.go
index 45de19a..fab2f8b 100644
--- a/cmd/run.go
+++ b/cmd/run.go
@@ -150,7 +150,7 @@ func newControlPlane(log *logrus.Logger, bpf interface{}, conf *config.Config) (
 	}
 
 	if len(conf.Global.LanInterface) == 0 && len(conf.Global.WanInterface) == 0 {
-		return nil, fmt.Errorf("LanInterface and WanInterface cannot both be empty")
+		log.Warnln("No binding interface.")
 	}
 
 	// Deep copy a conf to avoid modification.
diff --git a/control/bpf_utils.go b/control/bpf_utils.go
index f7c9f3e..1ba0a44 100644
--- a/control/bpf_utils.go
+++ b/control/bpf_utils.go
@@ -178,8 +178,6 @@ func (p bpfIfParams) CheckVersionRequirement(version *internal.Version) (err err
 type loadBpfOptions struct {
 	PinPath           string
 	CollectionOptions *ebpf.CollectionOptions
-	BindLan           bool
-	BindWan           bool
 }
 
 func fullLoadBpfObjects(
diff --git a/control/control_plane.go b/control/control_plane.go
index 72e3ff4..782d984 100644
--- a/control/control_plane.go
+++ b/control/control_plane.go
@@ -131,8 +131,6 @@ func NewControlPlane(
 		if err = fullLoadBpfObjects(log, bpf, &loadBpfOptions{
 			PinPath:           pinPath,
 			CollectionOptions: collectionOpts,
-			BindLan:           len(global.LanInterface) > 0,
-			BindWan:           len(global.WanInterface) > 0,
 		}); err != nil {
 			if log.Level == logrus.PanicLevel {
 				log.Panicln(err)