chore: better error ignore

listener/sing/sing.go

@@ -103,7 +103,7 @@ func (h *ListenerHandler) NewPacketConnection(ctx context.Context, conn network.
 		dest, err := conn.ReadPacket(buff)
 		if err != nil {
 			buff.Release()
-			if E.IsClosed(err) {
+			if ShouldIgnorePacketError(err) {
 				break
 			}
 			return err
@@ -128,6 +128,14 @@ func (h *ListenerHandler) NewError(ctx context.Context, err error) {
 	log.Warnln("%s listener get error: %+v", h.Type.String(), err)
 }
 
+func ShouldIgnorePacketError(err error) bool {
+	// ignore simple error
+	if E.IsTimeout(err) || E.IsClosed(err) || E.IsCanceled(err) {
+		return true
+	}
+	return false
+}
+
 type packet struct {
 	conn  *network.PacketConn
 	mutex *sync.Mutex

listener/sing_tun/dns.go

@@ -6,7 +6,6 @@ import (
 	"io"
 	"net"
 	"net/netip"
-	"os"
 	"sync"
 	"time"
 
@@ -18,7 +17,6 @@ import (
 	D "github.com/miekg/dns"
 
 	"github.com/sagernet/sing/common/buf"
-	E "github.com/sagernet/sing/common/exceptions"
 	M "github.com/sagernet/sing/common/metadata"
 	"github.com/sagernet/sing/common/network"
 )
@@ -118,8 +116,7 @@ func (h *ListenerHandler) NewPacketConnection(ctx context.Context, conn network.
 			dest, err := conn.ReadPacket(buff)
 			if err != nil {
 				buff.Release()
-				// ignore simple error
-				if err == os.ErrDeadlineExceeded || E.IsClosed(err) {
+				if sing.ShouldIgnorePacketError(err) {
 					break
 				}
 				return err