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--[[
Copyright (c) 2016, Alexander Moisseev <moiseev@mezonplus.ru>
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.
]]--
--[[
MID plugin - suppress INVALID_MSGID and MISSING_MID for messages originating
from listed valid DKIM domains with missed or known proprietary Message-IDs
]]--
local rspamd_logger = require "rspamd_logger"
local rspamd_regexp = require "rspamd_regexp"
local settings = {
url = '',
symbol_known_mid = 'KNOWN_MID',
symbol_known_no_mid = 'KNOWN_NO_MID',
symbol_invalid_msgid = 'INVALID_MSGID',
symbol_missing_mid = 'MISSING_MID',
symbol_dkim_allow = 'R_DKIM_ALLOW',
csymbol_invalid_msgid_allowed = 'INVALID_MSGID_ALLOWED',
csymbol_missing_mid_allowed = 'MISSING_MID_ALLOWED',
}
local map = {}
local function known_mid_cb(task)
local re = {}
local header = task:get_header('Message-Id')
local das = task:get_symbol(settings['symbol_dkim_allow'])
if das and das[1] and das[1]['options'] then
for _,dkim_domain in ipairs(das[1]['options']) do
local v = map:get_key(dkim_domain)
if v then
if v == '' then
if not header then
task:insert_result(settings['symbol_known_no_mid'], 1, dkim_domain)
return
end
else
re[dkim_domain] = rspamd_regexp.create_cached(v)
if header and re[dkim_domain] and re[dkim_domain]:match(header) then
task:insert_result(settings['symbol_known_mid'], 1, dkim_domain)
return
end
end
end
end
end
end
local opts = rspamd_config:get_all_opt('mid')
if opts then
for k,v in pairs(opts) do
settings[k] = v
end
if settings['url'] and #settings['url'] > 0 then
map = rspamd_config:add_map ({
url = settings['url'],
type = 'map',
description = 'Message-IDs map'
})
local id = rspamd_config:register_symbol({
name = 'KNOWN_MID_CALLBACK',
type = 'callback',
callback = known_mid_cb
})
rspamd_config:register_symbol({
name = settings['symbol_known_mid'],
parent = id,
type = 'virtual'
})
rspamd_config:register_symbol({
name = settings['symbol_known_no_mid'],
parent = id,
type = 'virtual'
})
rspamd_config:add_composite(settings['csymbol_invalid_msgid_allowed'],
settings['symbol_known_mid'] .. ' & ' .. settings['symbol_invalid_msgid'])
rspamd_config:add_composite(settings['csymbol_missing_mid_allowed'],
settings['symbol_known_no_mid'] .. ' & ' .. settings['symbol_missing_mid'])
rspamd_config:register_dependency(id, settings['symbol_dkim_allow'])
else
rspamd_logger.infox(rspamd_config, 'url is not specified, disabling module')
end
end
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