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--[[
Copyright (c) 2016, Vsevolod Stakhov <vsevolod@highsecure.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.
]]--
-- This plugin implements dynamic updates for rspamd
local ucl = require "ucl"
require "fun" ()
local rspamd_logger = require "rspamd_logger"
local updates_priority = 2
local rspamd_config = rspamd_config
local hash = require "rspamd_cryptobox_hash"
local rspamd_version = rspamd_version
local function process_symbols(obj)
each(function(sym, score)
rspamd_config:set_metric_symbol({
name = sym,
score = score,
priority = updates_priority
})
end, obj)
end
local function process_actions(obj)
each(function(act, score)
rspamd_config:set_metric_action({
name = act,
score = score,
priority = updates_priority
})
end, obj)
end
local function process_actions(obj)
each(function(key, code)
dostring(code)
end, obj)
end
local function check_version(obj)
local ret = true
if obj['min_version'] then
if rspamd_version('cmp', obj['min_version']) < 0 then
ret = false
rspamd_logger.errx(rspamd_config, 'updates require at least %s version of rspamd',
obj['min_version'])
end
end
if obj['max_version'] then
if rspamd_version('cmp', obj['max_version']) > 0 then
ret = false
rspamd_logger.errx(rspamd_config, 'updates require maximum %s version of rspamd',
obj['max_version'])
end
end
return ret
end
local function process_updates(data)
local ucl = require "ucl"
local parser = ucl.parser()
local res,err = parser:parse_string(data)
if not res then
rspamd_logger.warnx(rspamd_config, 'cannot parse updates map: ' .. err)
else
local h = hash.create()
h:update(data)
local obj = parser:get_object()
if check_version(obj) then
if obj['symbols'] then
process_symbols(obj['symbols'])
end
if obj['actions'] then
process_actions(obj['actions'])
end
if obj['rules'] then
process_rules(obj['rules'])
end
rspamd_logger.infox(rspamd_config, 'loaded new rules with hash "%s"',
h:hex())
end
end
return res
end
-- Configuration part
local section = rspamd_config:get_all_opt("rspamd_update")
if section then
each(function(k, elt)
if k == 'priority' then
updates_priority = tonumber(elt)
else
if not rspamd_config:add_map(elt, "rspamd updates map", process_updates) then
rspamd_logger.errx(rspamd_config, 'cannot load settings from %1', elt)
end
end
end, section)
end
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