110 lines
2.4 KiB
Lua
110 lines
2.4 KiB
Lua
-- Copyright (c) 2018-2023, 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.tcp
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-- A TCP segment header
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--
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-- A TCP segment header.
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-- The data itself is in the
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-- .I dnsjit.core.object.payload
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-- object, which is the next object in the chain after parsing with,
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-- for example,
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-- .IR dnsjit.filter.layer .
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-- .SS Attributes
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-- .TP
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-- sport
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-- Source port.
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-- .TP
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-- dport
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-- Destination port.
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-- .TP
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-- seq
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-- Sequence number.
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-- .TP
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-- ack
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-- Acknowledgement number.
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-- .TP
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-- off
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-- Data offset.
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-- .TP
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-- x2
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-- Unused.
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-- .TP
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-- flags
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-- TCP flags.
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-- .TP
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-- win
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-- Window.
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-- .TP
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-- sum
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-- Checksum.
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-- .TP
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-- urp
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-- Urgent pointer.
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-- .TP
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-- opts
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-- Array of bytes with the TCP options found.
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-- .TP
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-- opts_len
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-- Length of the TCP options.
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module(...,package.seeall)
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require("dnsjit.core.object.tcp_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_tcp_t"
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local core_object_tcp_t
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local Tcp = {}
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-- Return the textual type of the object.
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function Tcp:type()
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return "tcp"
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end
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-- Return the previous object.
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function Tcp: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 Tcp: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 Tcp: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 Tcp:copy()
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return C.core_object_tcp_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 Tcp:free()
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C.core_object_tcp_free(self)
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end
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core_object_tcp_t = ffi.metatype(t_name, { __index = Tcp })
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-- dnsjit.core.object (3),
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-- dnsjit.core.object.payload (3),
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-- dnsjit.filter.layer (3)
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return Tcp
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