1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
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
|
