fix: preprocess wan_interface 'auto' before ebpf program loading to avoid to fail to insert filter

config/patch.go

@@ -6,6 +6,8 @@
 package config
 
 import (
+	"fmt"
+	"github.com/daeuniverse/dae/common"
 	"github.com/daeuniverse/dae/common/consts"
 )
 
@@ -13,6 +15,7 @@ type patch func(params *Config) error
 
 var patches = []patch{
 	patchEmptyDns,
+	patchWanInterfaceAuto,
 }
 
 func patchEmptyDns(params *Config) error {
@@ -24,3 +27,21 @@ func patchEmptyDns(params *Config) error {
 	}
 	return nil
 }
+
+func patchWanInterfaceAuto(params *Config) error {
+	// preprocess "auto".
+	ifs := make([]string, 0, len(params.Global.WanInterface)+2)
+	for _, ifname := range params.Global.WanInterface {
+		if ifname == "auto" {
+			defaultIfs, err := common.GetDefaultIfnames()
+			if err != nil {
+				return fmt.Errorf("failed to convert 'auto': %w", err)
+			}
+			ifs = append(ifs, defaultIfs...)
+		} else {
+			ifs = append(ifs, ifname)
+		}
+	}
+	params.Global.WanInterface = common.Deduplicate(ifs)
+	return nil
+}

control/control_plane.go

@@ -203,20 +203,6 @@ func NewControlPlane(
 		}
 	}
 	// Bind to WAN
-	// preprocess "auto".
-	ifs := make([]string, 0, len(global.WanInterface)+2)
-	for _, ifname := range global.WanInterface {
-		if ifname == "auto" {
-			defaultIfs, err := common.GetDefaultIfnames()
-			if err != nil {
-				return nil, fmt.Errorf("failed to convert 'auto': %w", err)
-			}
-			ifs = append(ifs, defaultIfs...)
-		} else {
-			ifs = append(ifs, ifname)
-		}
-	}
-	global.WanInterface = common.Deduplicate(ifs)
 	if len(global.WanInterface) > 0 {
 		if err = core.setupSkPidMonitor(); err != nil {
 			return nil, err