fix panic in tun handler

2023-10-08 22:04:36 +08:00
parent 6a36ebcc9f
commit 61f1f05339
2 changed files with 12 additions and 0 deletions
--- a/handler/tap/handler.go
+++ b/handler/tap/handler.go
@ -204,6 +204,9 @@ func (h *tapHandler) transport(tap net.Conn, conn net.PacketConn, raddr net.Addr
 					}
 					return err
 				}
+				if n == 0 {
+					return nil
+				}

 				src := waterutil.MACSource((*b)[:n])
 				dst := waterutil.MACDestination((*b)[:n])
@ -260,6 +263,9 @@ func (h *tapHandler) transport(tap net.Conn, conn net.PacketConn, raddr net.Addr
 					err != shadowaead.ErrShortPacket {
 					return err
 				}
+				if n == 0 {
+					return nil
+				}

 				src := waterutil.MACSource((*b)[:n])
 				dst := waterutil.MACDestination((*b)[:n])