1 files changed, 72 insertions, 0 deletions
diff --git a/include/dnsjit/core/object/null.lua b/include/dnsjit/core/object/null.lua
new file mode 100644
index 0000000..e6dfc5d
--- /dev/null
+++ b/include/dnsjit/core/object/null.lua
@@ -0,0 +1,72 @@
+-- Copyright (c) 2018-2021, OARC, Inc.
+-- All rights reserved.
+--
+-- This file is part of dnsjit.
+--
+-- dnsjit is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation, either version 3 of the License, or
+-- (at your option) any later version.
+--
+-- dnsjit is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License
+-- along with dnsjit.  If not, see <http://www.gnu.org/licenses/>.
+
+-- dnsjit.core.object.null
+-- BSD loopback encapsulation (null) part of a packet
+--
+-- The null part of a packet that usually can be found in the object chain
+-- after parsing with, for example, Layer filter.
+-- .SS Attributes
+-- .TP
+-- family
+-- The link-layer header describing what type of packet is encapsulated.
+module(...,package.seeall)
+
+require("dnsjit.core.object.null_h")
+local ffi = require("ffi")
+local C = ffi.C
+
+local t_name = "core_object_null_t"
+local core_object_null_t
+local Null = {}
+
+-- Return the textual type of the object.
+function Null:type()
+    return "null"
+end
+
+-- Return the previous object.
+function Null:prev()
+    return self.obj_prev
+end
+
+-- Cast the object to the underlining object module and return it.
+function Null:cast()
+    return self
+end
+
+-- Cast the object to the generic object module and return it.
+function Null:uncast()
+    return ffi.cast("core_object_t*", self)
+end
+
+-- Make a copy of the object and return it.
+function Null:copy()
+    return C.core_object_null_copy(self)
+end
+
+-- Free the object, should only be used on copies or otherwise allocated.
+function Null:free()
+    C.core_object_null_free(self)
+end
+
+core_object_null_t = ffi.metatype(t_name, { __index = Null })
+
+-- dnsjit.core.object (3),
+-- dnsjit.filter.layer (3)
+return Null