diff --git a/core/stack.go b/core/stack.go
index 94178da..7edc757 100644
--- a/core/stack.go
+++ b/core/stack.go
@@ -23,9 +23,9 @@ type Config struct {
 	// stack to set transport handlers.
 	TransportHandler adapter.TransportHandler
 
-	// ErrorFunc is the function that will be called
-	// when internal stack encounters errors.
-	ErrorFunc func(tcpip.Error)
+	// PrintFunc is the function that will be called
+	// to print internal stack events.
+	PrintFunc func(string, ...any)
 
 	// Options are supplement options to apply settings
 	// for the internal stack.
@@ -34,8 +34,8 @@ type Config struct {
 
 // CreateStack creates *stack.Stack with given config.
 func CreateStack(cfg *Config) (*stack.Stack, error) {
-	if cfg.ErrorFunc == nil {
-		cfg.ErrorFunc = func(tcpip.Error) {}
+	if cfg.PrintFunc == nil {
+		cfg.PrintFunc = func(string, ...any) {}
 	}
 
 	opts := cfg.Options
@@ -64,8 +64,8 @@ func CreateStack(cfg *Config) (*stack.Stack, error) {
 		// before creating NIC, otherwise NIC would dispatch packets
 		// to stack and cause race condition.
 		// Initiate transport protocol (TCP/UDP) with given handler.
-		withTCPHandler(cfg.TransportHandler.HandleTCP, cfg.ErrorFunc),
-		withUDPHandler(cfg.TransportHandler.HandleUDP, cfg.ErrorFunc),
+		withTCPHandler(cfg.TransportHandler.HandleTCP, cfg.PrintFunc),
+		withUDPHandler(cfg.TransportHandler.HandleUDP, cfg.PrintFunc),
 
 		// Create stack NIC and then bind link endpoint to it.
 		withCreatingNIC(nicID, cfg.LinkEndpoint),
diff --git a/core/tcp.go b/core/tcp.go
index 305d759..22a14a7 100644
--- a/core/tcp.go
+++ b/core/tcp.go
@@ -39,7 +39,7 @@ const (
 	tcpKeepaliveInterval = 30 * time.Second
 )
 
-func withTCPHandler(handle func(adapter.TCPConn), callback func(tcpip.Error)) option.Option {
+func withTCPHandler(handle func(adapter.TCPConn), printf func(string, ...any)) option.Option {
 	return func(s *stack.Stack) error {
 		tcpForwarder := tcp.NewForwarder(s, defaultWndSize, maxConnAttempts, func(r *tcp.ForwarderRequest) {
 			var (
@@ -50,7 +50,7 @@ func withTCPHandler(handle func(adapter.TCPConn), callback func(tcpip.Error)) op
 
 			defer func() {
 				if err != nil {
-					callback(err)
+					printf("forward tcp request: %s", err)
 				}
 			}()
 
diff --git a/core/udp.go b/core/udp.go
index 3c2436b..d90d33a 100644
--- a/core/udp.go
+++ b/core/udp.go
@@ -4,20 +4,19 @@ import (
 	"github.com/xjasonlyu/tun2socks/v2/core/adapter"
 	"github.com/xjasonlyu/tun2socks/v2/core/option"
 
-	"gvisor.dev/gvisor/pkg/tcpip"
 	"gvisor.dev/gvisor/pkg/tcpip/adapters/gonet"
 	"gvisor.dev/gvisor/pkg/tcpip/stack"
 	"gvisor.dev/gvisor/pkg/tcpip/transport/udp"
 	"gvisor.dev/gvisor/pkg/waiter"
 )
 
-func withUDPHandler(handle func(adapter.UDPConn), callback func(tcpip.Error)) option.Option {
+func withUDPHandler(handle func(adapter.UDPConn), printf func(string, ...any)) option.Option {
 	return func(s *stack.Stack) error {
 		udpForwarder := udp.NewForwarder(s, func(r *udp.ForwarderRequest) {
 			var wq waiter.Queue
 			ep, err := r.CreateEndpoint(&wq)
 			if err != nil {
-				callback(err)
+				printf("forward udp request: %s", err)
 				return
 			}
 
diff --git a/engine/engine.go b/engine/engine.go
index 92bb12c..cc3a1ab 100644
--- a/engine/engine.go
+++ b/engine/engine.go
@@ -2,6 +2,7 @@ package engine
 
 import (
 	"errors"
+	"fmt"
 	"sync"
 
 	"github.com/xjasonlyu/tun2socks/v2/component/dialer"
@@ -158,8 +159,8 @@ func netstack(k *Key) (err error) {
 	if _defaultStack, err = core.CreateStack(&core.Config{
 		LinkEndpoint:     _defaultDevice,
 		TransportHandler: &mirror.Tunnel{},
-		ErrorFunc: func(err tcpip.Error) {
-			log.Warnf("[STACK] %s", err)
+		PrintFunc: func(format string, v ...any) {
+			log.Warnf("[STACK] %s", fmt.Sprintf(format, v...))
 		},
 	}); err != nil {
 		return