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
|
--[[
Copyright (c) 2016, Steve Freegard <steve.freegard@fsl.com>
Copyright (c) 2016, Vsevolod Stakhov
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
]]--
-- Check messages for 'bulkiness' using DCC
local N = 'dcc'
local symbol_bulk = "DCC_BULK"
local symbol = "DCC_REJECT"
local opts = rspamd_config:get_all_opt(N)
local lua_util = require "lua_util"
local rspamd_logger = require "rspamd_logger"
local dcc = require("lua_scanners").filter('dcc').dcc
if confighelp then
rspamd_config:add_example(nil, 'dcc',
"Check messages for 'bulkiness' using DCC",
[[
dcc {
socket = "/var/dcc/dccifd"; # Unix socket
servers = "127.0.0.1:10045" # OR TCP upstreams
timeout = 2s; # Timeout to wait for checks
body_max = 999999; # Bulkness threshold for body
fuz1_max = 999999; # Bulkness threshold for fuz1
fuz2_max = 999999; # Bulkness threshold for fuz2
}
]])
return
end
local rule
local function check_dcc (task)
dcc.check(task, task:get_content(), nil, rule)
end
-- Configuration
-- WORKAROUND for deprecated host and port settings
if opts['host'] ~= nil and opts['port'] ~= nil then
opts['servers'] = opts['host'] .. ':' .. opts['port']
rspamd_logger.warnx(rspamd_config, 'Using host and port parameters is deprecated. ' ..
'Please use servers = "%s:%s"; instead', opts['host'], opts['port'])
end
if opts['host'] ~= nil and not opts['port'] then
opts['socket'] = opts['host']
rspamd_logger.warnx(rspamd_config, 'Using host parameters is deprecated. ' ..
'Please use socket = "%s"; instead', opts['host'])
end
-- WORKAROUND for deprecated host and port settings
if not opts.symbol_bulk then
opts.symbol_bulk = symbol_bulk
end
if not opts.symbol then
opts.symbol = symbol
end
rule = dcc.configure(opts)
if rule then
local id = rspamd_config:register_symbol({
name = 'DCC_CHECK',
callback = check_dcc,
type = 'callback',
})
rspamd_config:register_symbol {
type = 'virtual',
parent = id,
name = opts.symbol
}
rspamd_config:register_symbol {
type = 'virtual',
parent = id,
name = opts.symbol_bulk
}
rspamd_config:register_symbol {
type = 'virtual',
parent = id,
name = 'DCC_FAIL'
}
rspamd_config:set_metric_symbol({
group = N,
score = 1.0,
description = 'Detected as bulk mail by DCC',
one_shot = true,
name = opts.symbol_bulk,
})
rspamd_config:set_metric_symbol({
group = N,
score = 2.0,
description = 'Rejected by DCC',
one_shot = true,
name = opts.symbol,
})
rspamd_config:set_metric_symbol({
group = N,
score = 0.0,
description = 'DCC failure',
one_shot = true,
name = 'DCC_FAIL',
})
else
lua_util.disable_module(N, "config")
rspamd_logger.infox('DCC module not configured');
end
|
