1 files changed, 110 insertions, 0 deletions
diff --git a/include/dnsjit/core/object/tcp.lua b/include/dnsjit/core/object/tcp.lua
new file mode 100644
index 0000000..e1d6dc2
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+++ b/include/dnsjit/core/object/tcp.lua
@@ -0,0 +1,110 @@
+-- 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.tcp
+-- A TCP segment header
+--
+-- A TCP segment header.
+-- The data itself is in the
+-- .I dnsjit.core.object.payload
+-- object, which is the next object in the chain after parsing with,
+-- for example,
+-- .IR dnsjit.filter.layer .
+-- .SS Attributes
+-- .TP
+-- sport
+-- Source port.
+-- .TP
+-- dport
+-- Destination port.
+-- .TP
+-- seq
+-- Sequence number.
+-- .TP
+-- ack
+-- Acknowledgement number.
+-- .TP
+-- off
+-- Data offset.
+-- .TP
+-- x2
+-- Unused.
+-- .TP
+-- flags
+-- TCP flags.
+-- .TP
+-- win
+-- Window.
+-- .TP
+-- sum
+-- Checksum.
+-- .TP
+-- urp
+-- Urgent pointer.
+-- .TP
+-- opts
+-- Array of bytes with the TCP options found.
+-- .TP
+-- opts_len
+-- Length of the TCP options.
+module(...,package.seeall)
+
+require("dnsjit.core.object.tcp_h")
+local ffi = require("ffi")
+local C = ffi.C
+
+local t_name = "core_object_tcp_t"
+local core_object_tcp_t
+local Tcp = {}
+
+-- Return the textual type of the object.
+function Tcp:type()
+    return "tcp"
+end
+
+-- Return the previous object.
+function Tcp:prev()
+    return self.obj_prev
+end
+
+-- Cast the object to the underlining object module and return it.
+function Tcp:cast()
+    return self
+end
+
+-- Cast the object to the generic object module and return it.
+function Tcp:uncast()
+    return ffi.cast("core_object_t*", self)
+end
+
+-- Make a copy of the object and return it.
+function Tcp:copy()
+    return C.core_object_tcp_copy(self)
+end
+
+-- Free the object, should only be used on copies or otherwise allocated.
+function Tcp:free()
+    C.core_object_tcp_free(self)
+end
+
+core_object_tcp_t = ffi.metatype(t_name, { __index = Tcp })
+
+-- dnsjit.core.object (3),
+-- dnsjit.core.object.payload (3),
+-- dnsjit.filter.layer (3)
+return Tcp