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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2021-03-13 07:54:12 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2021-03-13 07:54:12 +0000 |
commit | 4754ed45b607e82450a5e31fea1da3ba61433b04 (patch) | |
tree | 3554490bdc003e6004f605abe41929cdf98b0651 /src/core/object/ip.lua | |
parent | Initial commit. (diff) | |
download | dnsjit-4754ed45b607e82450a5e31fea1da3ba61433b04.tar.xz dnsjit-4754ed45b607e82450a5e31fea1da3ba61433b04.zip |
Adding upstream version 1.1.0+debian.upstream/1.1.0+debian
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/core/object/ip.lua | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/src/core/object/ip.lua b/src/core/object/ip.lua new file mode 100644 index 0000000..0294612 --- /dev/null +++ b/src/core/object/ip.lua @@ -0,0 +1,122 @@ +-- 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.ip +-- An IP packet +-- +-- An IP packet that usually can be found in the object chain +-- after parsing with, for example, Layer filter. +-- .SS Attributes +-- .TP +-- v +-- Version. +-- .TP +-- hl +-- Header length. +-- .TP +-- tos +-- Type of service. +-- .TP +-- len +-- Total length. +-- .TP +-- id +-- Identification. +-- .TP +-- off +-- Fragment offset field. +-- .TP +-- ttl +-- Time to live. +-- .TP +-- p +-- Protocol. +-- .TP +-- sum +-- Checksum. +-- .TP +-- src +-- Source address. +-- .TP +-- dst +-- Destination address. +-- .TP +-- payload +-- A pointer to the payload. +-- .TP +-- plen +-- The length of the payload. +-- .TP +-- pad_len +-- The length of padding found, if any. +module(...,package.seeall) + +require("dnsjit.core.object.ip_h") +local ffi = require("ffi") +local C = ffi.C +local libip = require("dnsjit.lib.ip") + +local t_name = "core_object_ip_t" +local core_object_ip_t +local Ip = {} + +-- Return the textual type of the object. +function Ip:type() + return "ip" +end + +-- Return the previous object. +function Ip:prev() + return self.obj_prev +end + +-- Cast the object to the underlining object module and return it. +function Ip:cast() + return self +end + +-- Cast the object to the generic object module and return it. +function Ip:uncast() + return ffi.cast("core_object_t*", self) +end + +-- Make a copy of the object and return it. +function Ip:copy() + return C.core_object_ip_copy(self) +end + +-- Free the object, should only be used on copies or otherwise allocated. +function Ip:free() + C.core_object_ip_free(self) +end + +-- Return the IP source as a string. +function Ip:source() + return libip.ipstring(self.src) +end + +-- Return the IP destination as a string. +function Ip:destination() + return libip.ipstring(self.dst) +end + +core_object_ip_t = ffi.metatype(t_name, { __index = Ip }) + +-- dnsjit.core.object (3), +-- dnsjit.filter.layer (3) +return Ip |