87 lines
2.3 KiB
Lua
87 lines
2.3 KiB
Lua
-- Copyright (c) 2018-2025 OARC, Inc.
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-- All rights reserved.
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--
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-- This file is part of dnsjit.
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--
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-- dnsjit is free software: you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation, either version 3 of the License, or
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-- (at your option) any later version.
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--
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-- dnsjit is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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-- You should have received a copy of the GNU General Public License
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-- along with dnsjit. If not, see <http://www.gnu.org/licenses/>.
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-- dnsjit.core.object.gre
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-- Generic Routing Encapsulation (GRE) part of a packet
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--
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-- The GRE part of a packet that usually can be found in the object chain
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-- after parsing with, for example, Layer filter.
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-- See RFC 1701.
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-- .SS Attributes
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-- .TP
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-- gre_flags
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-- The GRE flags.
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-- .TP
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-- ether_type
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-- The protocol type of the payload packet.
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-- .TP
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-- checksum
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-- The checksum of the GRE header and the payload packet.
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-- .TP
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-- key
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-- The Key field contains a four octet number which was inserted by
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-- the encapsulator.
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-- .TP
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-- sequence
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-- The Sequence Number field contains an unsigned 32 bit integer which is
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-- inserted by the encapsulator.
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module(...,package.seeall)
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require("dnsjit.core.object.gre_h")
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local ffi = require("ffi")
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local C = ffi.C
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local t_name = "core_object_gre_t"
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local core_object_gre_t
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local Gre = {}
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-- Return the textual type of the object.
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function Gre:type()
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return "gre"
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end
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-- Return the previous object.
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function Gre:prev()
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return self.obj_prev
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end
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-- Cast the object to the underlining object module and return it.
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function Gre:cast()
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return self
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end
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-- Cast the object to the generic object module and return it.
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function Gre:uncast()
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return ffi.cast("core_object_t*", self)
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end
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-- Make a copy of the object and return it.
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function Gre:copy()
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return C.core_object_gre_copy(self)
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end
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-- Free the object, should only be used on copies or otherwise allocated.
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function Gre:free()
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C.core_object_gre_free(self)
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end
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core_object_gre_t = ffi.metatype(t_name, { __index = Gre })
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-- dnsjit.core.object (3),
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-- dnsjit.filter.layer (3)
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return Gre
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