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Diffstat (limited to 'src/core/object/udp.lua')
-rw-r--r-- | src/core/object/udp.lua | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/src/core/object/udp.lua b/src/core/object/udp.lua new file mode 100644 index 0000000..1652574 --- /dev/null +++ b/src/core/object/udp.lua @@ -0,0 +1,86 @@ +-- 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.udp +-- A UDP datagram header +-- +-- A UDP datagram 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 +-- ulen +-- UDP length (as described in the UDP header). +-- .TP +-- sum +-- Checksum. +module(...,package.seeall) + +require("dnsjit.core.object.udp_h") +local ffi = require("ffi") +local C = ffi.C + +local t_name = "core_object_udp_t" +local core_object_udp_t +local Udp = {} + +-- Return the textual type of the object. +function Udp:type() + return "udp" +end + +-- Return the previous object. +function Udp:prev() + return self.obj_prev +end + +-- Cast the object to the underlining object module and return it. +function Udp:cast() + return self +end + +-- Cast the object to the generic object module and return it. +function Udp:uncast() + return ffi.cast("core_object_t*", self) +end + +-- Make a copy of the object and return it. +function Udp:copy() + return C.core_object_udp_copy(self) +end + +-- Free the object, should only be used on copies or otherwise allocated. +function Udp:free() + C.core_object_udp_free(self) +end + +core_object_udp_t = ffi.metatype(t_name, { __index = Udp }) + +-- dnsjit.core.object (3), +-- dnsjit.core.object.payload (3), +-- dnsjit.filter.layer (3) +return Udp |