Update headroom usage

shadowaead/protocol.go

@@ -310,10 +310,22 @@ func (c *clientPacketConn) WriteTo(p []byte, addr net.Addr) (n int, err error) {
 	return len(p), nil
 }
 
-func (c *clientPacketConn) Headroom() int {
+func (c *clientPacketConn) FrontHeadroom() int {
 	return c.keySaltLength + M.MaxSocksaddrLength
 }
 
+func (c *clientPacketConn) RearHeadroom() int {
+	return Overhead
+}
+
+func (c *clientPacketConn) ReaderMTU() int {
+	return MaxPacketSize
+}
+
+func (c *clientPacketConn) WriterMTU() int {
+	return MaxPacketSize
+}
+
 func (c *clientPacketConn) Upstream() any {
 	return c.Conn
 }

shadowaead/service.go

@@ -208,6 +208,10 @@ func (c *serverConn) Upstream() any {
 	return c.Conn
 }
 
+func (s *Service) ReaderMTU() int {
+	return MaxPacketSize
+}
+
 func (s *Service) WriteIsThreadUnsafe() {
 }
 
@@ -280,10 +284,18 @@ func (w *serverPacketWriter) WritePacket(buffer *buf.Buffer, destination M.Socks
 	return w.source.WritePacket(buffer, M.SocksaddrFromNet(w.nat.LocalAddr()))
 }
 
-func (w *serverPacketWriter) Headroom() int {
+func (w *serverPacketWriter) FrontHeadroom() int {
 	return w.keySaltLength + M.MaxSocksaddrLength
 }
 
+func (w *serverPacketWriter) RearHeadroom() int {
+	return Overhead
+}
+
+func (w *serverPacketWriter) WriterMTU() int {
+	return MaxPacketSize
+}
+
 func (w *serverPacketWriter) Upstream() any {
 	return w.source
 }