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|
--[[
Copyright (c) 2022, Vsevolod Stakhov <vsevolod@rspamd.com>
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.
]]--
if confighelp then
return
end
-- Multimap is rspamd module designed to define and operate with different maps
local rules = {}
local rspamd_logger = require "rspamd_logger"
local rspamd_util = require "rspamd_util"
local rspamd_regexp = require "rspamd_regexp"
local rspamd_expression = require "rspamd_expression"
local rspamd_ip = require "rspamd_ip"
local lua_util = require "lua_util"
local lua_selectors = require "lua_selectors"
local lua_maps = require "lua_maps"
local redis_params
local fun = require "fun"
local N = 'multimap'
local multimap_grammar
-- Parse result in form: <symbol>:<score>|<symbol>|<score>
local function parse_multimap_value(parse_rule, p_ret)
if p_ret and type(p_ret) == 'string' then
local lpeg = require "lpeg"
if not multimap_grammar then
local number = {}
local digit = lpeg.R("09")
number.integer = (lpeg.S("+-") ^ -1) *
(digit ^ 1)
-- Matches: .6, .899, .9999873
number.fractional = (lpeg.P(".")) *
(digit ^ 1)
-- Matches: 55.97, -90.8, .9
number.decimal = (number.integer * -- Integer
(number.fractional ^ -1)) + -- Fractional
(lpeg.S("+-") * number.fractional) -- Completely fractional number
local sym_start = lpeg.R("az", "AZ") + lpeg.S("_")
local sym_elt = sym_start + lpeg.R("09")
local symbol = sym_start * sym_elt ^ 0
local symbol_cap = lpeg.Cg(symbol, 'symbol')
local score_cap = lpeg.Cg(number.decimal, 'score')
local opts_cap = lpeg.Cg(lpeg.Ct(lpeg.C(symbol) * (lpeg.P(",") * lpeg.C(symbol)) ^ 0), 'opts')
local symscore_cap = (symbol_cap * lpeg.P(":") * score_cap)
local symscoreopt_cap = symscore_cap * lpeg.P(":") * opts_cap
local grammar = symscoreopt_cap + symscore_cap + symbol_cap + score_cap
multimap_grammar = lpeg.Ct(grammar)
end
local tbl = multimap_grammar:match(p_ret)
if tbl then
local sym
local score = 1.0
local opts = {}
if tbl.symbol then
sym = tbl.symbol
end
if tbl.score then
score = tonumber(tbl.score)
end
if tbl.opts then
opts = tbl.opts
end
return true, sym, score, opts
else
if p_ret ~= '' then
rspamd_logger.infox(rspamd_config, '%s: cannot parse string "%s"',
parse_rule.symbol, p_ret)
end
return true, nil, 1.0, {}
end
elseif type(p_ret) == 'boolean' then
return p_ret, nil, 1.0, {}
end
return false, nil, 0.0, {}
end
local value_types = {
ip = {
get_value = function(ip)
return ip:to_string()
end,
},
from = {
get_value = function(val)
return val
end,
},
helo = {
get_value = function(val)
return val
end,
},
header = {
get_value = function(val)
return val
end,
},
rcpt = {
get_value = function(val)
return val
end,
},
user = {
get_value = function(val)
return val
end,
},
url = {
get_value = function(val)
return val
end,
},
dnsbl = {
get_value = function(ip)
return ip:to_string()
end,
},
filename = {
get_value = function(val)
return val
end,
},
content = {
get_value = function()
return nil
end,
},
hostname = {
get_value = function(val)
return val
end,
},
asn = {
get_value = function(val)
return val
end,
},
country = {
get_value = function(val)
return val
end,
},
received = {
get_value = function(val)
return val
end,
},
mempool = {
get_value = function(val)
return val
end,
},
selector = {
get_value = function(val)
return val
end,
},
symbol_options = {
get_value = function(val)
return val
end,
},
}
local function ip_to_rbl(ip, rbl)
return table.concat(ip:inversed_str_octets(), ".") .. '.' .. rbl
end
local function apply_hostname_filter(task, filter, hostname, r)
if filter == 'tld' then
local tld = rspamd_util.get_tld(hostname)
return tld
elseif filter == 'top' then
local tld = rspamd_util.get_tld(hostname)
return tld:match('[^.]*$') or tld
else
if not r['re_filter'] then
local pat = string.match(filter, 'tld:regexp:(.+)')
if not pat then
rspamd_logger.errx(task, 'bad search filter: %s', filter)
return
end
r['re_filter'] = rspamd_regexp.create_cached(pat)
if not r['re_filter'] then
rspamd_logger.errx(task, 'couldnt create regex: %s', pat)
return
end
end
local tld = rspamd_util.get_tld(hostname)
local res = r['re_filter']:search(tld)
if res then
return res[1]
else
return nil
end
end
end
local function apply_url_filter(task, filter, url, r)
if not filter then
return url:get_host()
end
if filter == 'tld' then
return url:get_tld()
elseif filter == 'top' then
local tld = url:get_tld()
return tld:match('[^.]*$') or tld
elseif filter == 'full' then
return url:get_text()
elseif filter == 'is_phished' then
if url:is_phished() then
return url:get_host()
else
return nil
end
elseif filter == 'is_redirected' then
if url:is_redirected() then
return url:get_host()
else
return nil
end
elseif filter == 'is_obscured' then
if url:is_obscured() then
return url:get_host()
else
return nil
end
elseif filter == 'path' then
return url:get_path()
elseif filter == 'query' then
return url:get_query()
elseif string.find(filter, 'tag:') then
local tags = url:get_tags()
local want_tag = string.match(filter, 'tag:(.*)')
for _, t in ipairs(tags) do
if t == want_tag then
return url:get_host()
end
end
return nil
elseif string.find(filter, 'tld:regexp:') then
if not r['re_filter'] then
local type, pat = string.match(filter, '(regexp:)(.+)')
if type and pat then
r['re_filter'] = rspamd_regexp.create_cached(pat)
end
end
if not r['re_filter'] then
rspamd_logger.errx(task, 'bad search filter: %s', filter)
else
local results = r['re_filter']:search(url:get_tld())
if results then
return results[1]
else
return nil
end
end
elseif string.find(filter, 'full:regexp:') then
if not r['re_filter'] then
local type, pat = string.match(filter, '(regexp:)(.+)')
if type and pat then
r['re_filter'] = rspamd_regexp.create_cached(pat)
end
end
if not r['re_filter'] then
rspamd_logger.errx(task, 'bad search filter: %s', filter)
else
local results = r['re_filter']:search(url:get_text())
if results then
return results[1]
else
return nil
end
end
elseif string.find(filter, 'regexp:') then
if not r['re_filter'] then
local type, pat = string.match(filter, '(regexp:)(.+)')
if type and pat then
r['re_filter'] = rspamd_regexp.create_cached(pat)
end
end
if not r['re_filter'] then
rspamd_logger.errx(task, 'bad search filter: %s', filter)
else
local results = r['re_filter']:search(url:get_host())
if results then
return results[1]
else
return nil
end
end
elseif string.find(filter, '^template:') then
if not r['template'] then
r['template'] = string.match(filter, '^template:(.+)')
end
if r['template'] then
return lua_util.template(r['template'], url:to_table())
end
end
return url:get_host()
end
local function apply_addr_filter(task, filter, input, rule)
if filter == 'email:addr' or filter == 'email' then
local addr = rspamd_util.parse_mail_address(input, task:get_mempool(), 1024)
if addr and addr[1] then
return fun.totable(fun.map(function(a)
return a.addr
end, addr))
end
elseif filter == 'email:user' then
local addr = rspamd_util.parse_mail_address(input, task:get_mempool(), 1024)
if addr and addr[1] then
return fun.totable(fun.map(function(a)
return a.user
end, addr))
end
elseif filter == 'email:domain' then
local addr = rspamd_util.parse_mail_address(input, task:get_mempool(), 1024)
if addr and addr[1] then
return fun.totable(fun.map(function(a)
return a.domain
end, addr))
end
elseif filter == 'email:domain:tld' then
local addr = rspamd_util.parse_mail_address(input, task:get_mempool(), 1024)
if addr and addr[1] then
return fun.totable(fun.map(function(a)
return rspamd_util.get_tld(a.domain)
end, addr))
end
elseif filter == 'email:name' then
local addr = rspamd_util.parse_mail_address(input, task:get_mempool(), 1024)
if addr and addr[1] then
return fun.totable(fun.map(function(a)
return a.name
end, addr))
end
elseif filter == 'ip_addr' then
local ip_addr = rspamd_ip.from_string(input)
if ip_addr and ip_addr:is_valid() then
return ip_addr
end
else
-- regexp case
if not rule['re_filter'] then
local type, pat = string.match(filter, '(regexp:)(.+)')
if type and pat then
rule['re_filter'] = rspamd_regexp.create_cached(pat)
end
end
if not rule['re_filter'] then
rspamd_logger.errx(task, 'bad search filter: %s', filter)
else
local results = rule['re_filter']:search(input)
if results then
return results[1]
end
end
end
return input
end
local function apply_filename_filter(task, filter, fn, r)
if filter == 'extension' or filter == 'ext' then
return string.match(fn, '%.([^.]+)$')
elseif string.find(filter, 'regexp:') then
if not r['re_filter'] then
local type, pat = string.match(filter, '(regexp:)(.+)')
if type and pat then
r['re_filter'] = rspamd_regexp.create_cached(pat)
end
end
if not r['re_filter'] then
rspamd_logger.errx(task, 'bad search filter: %s', filter)
else
local results = r['re_filter']:search(fn)
if results then
return results[1]
else
return nil
end
end
end
return fn
end
local function apply_regexp_filter(task, filter, fn, r)
if string.find(filter, 'regexp:') then
if not r['re_filter'] then
local type, pat = string.match(filter, '(regexp:)(.+)')
if type and pat then
r['re_filter'] = rspamd_regexp.create_cached(pat)
end
end
if not r['re_filter'] then
rspamd_logger.errx(task, 'bad search filter: %s', filter)
else
local results = r['re_filter']:search(fn, false, true)
if results then
return results[1][2]
else
return nil
end
end
end
return fn
end
local function apply_content_filter(task, filter)
if filter == 'body' then
return { task:get_rawbody() }
elseif filter == 'full' then
return { task:get_content() }
elseif filter == 'headers' then
return { task:get_raw_headers() }
elseif filter == 'text' then
local ret = {}
for _, p in ipairs(task:get_text_parts()) do
table.insert(ret, p:get_content())
end
return ret
elseif filter == 'rawtext' then
local ret = {}
for _, p in ipairs(task:get_text_parts()) do
table.insert(ret, p:get_raw_content())
end
return ret
elseif filter == 'oneline' then
local ret = {}
for _, p in ipairs(task:get_text_parts()) do
table.insert(ret, p:get_content_oneline())
end
return ret
else
rspamd_logger.errx(task, 'bad search filter: %s', filter)
end
return {}
end
local multimap_filters = {
from = apply_addr_filter,
rcpt = apply_addr_filter,
helo = apply_hostname_filter,
symbol_options = apply_regexp_filter,
header = apply_addr_filter,
url = apply_url_filter,
filename = apply_filename_filter,
mempool = apply_regexp_filter,
selector = apply_regexp_filter,
hostname = apply_hostname_filter,
--content = apply_content_filter, -- Content filters are special :(
}
local function multimap_query_redis(key, task, value, callback)
local cmd = 'HGET'
if type(value) == 'userdata' and value.class == 'rspamd{ip}' then
cmd = 'HMGET'
end
local srch = { key }
-- Insert all ips for some mask :(
if type(value) == 'userdata' and value.class == 'rspamd{ip}' then
srch[#srch + 1] = tostring(value)
-- IPv6 case
local maxbits = 128
local minbits = 64
if value:get_version() == 4 then
maxbits = 32
minbits = 8
end
for i = maxbits, minbits, -1 do
local nip = value:apply_mask(i):tostring() .. "/" .. i
srch[#srch + 1] = nip
end
else
srch[#srch + 1] = value
end
local function redis_map_cb(err, data)
lua_util.debugm(N, task, 'got reply from Redis when trying to get key %s: err=%s, data=%s',
key, err, data)
if not err and type(data) ~= 'userdata' then
callback(data)
end
end
return rspamd_redis_make_request(task,
redis_params, -- connect params
key, -- hash key
false, -- is write
redis_map_cb, --callback
cmd, -- command
srch -- arguments
)
end
local function multimap_callback(task, rule)
local function match_element(r, value, callback)
if not value then
return false
end
local function get_key_callback(ret, err_or_data, err_code)
lua_util.debugm(N, task, 'got return "%s" (err code = %s) for multimap %s',
err_or_data,
err_code,
rule.symbol)
if ret then
if type(err_or_data) == 'table' then
for _, elt in ipairs(err_or_data) do
callback(elt)
end
else
callback(err_or_data)
end
elseif err_code ~= 404 then
rspamd_logger.infox(task, "map %s: get key returned error %s: %s",
rule.symbol, err_code, err_or_data)
end
end
lua_util.debugm(N, task, 'check value %s for multimap %s', value,
rule.symbol)
local ret = false
if r.redis_key then
-- Deal with hash name here: it can be either plain string or a selector
if type(r.redis_key) == 'string' then
ret = multimap_query_redis(r.redis_key, task, value, callback)
else
-- Here we have a selector
local results = r.redis_key(task)
-- Here we need to spill this function into multiple queries
if type(results) == 'table' then
for _, res in ipairs(results) do
ret = multimap_query_redis(res, task, value, callback)
if not ret then
break
end
end
else
ret = multimap_query_redis(results, task, value, callback)
end
end
return ret
elseif r.map_obj then
r.map_obj:get_key(value, get_key_callback, task)
end
end
local function insert_results(result, opt)
local _, symbol, score, opts = parse_multimap_value(rule, result)
local forced = false
if symbol then
if rule.symbols_set then
if not rule.symbols_set[symbol] then
rspamd_logger.infox(task, 'symbol %s is not registered for map %s, ' ..
'replace it with just %s',
symbol, rule.symbol, rule.symbol)
symbol = rule.symbol
end
elseif rule.disable_multisymbol then
symbol = rule.symbol
if type(opt) == 'table' then
table.insert(opt, result)
elseif type(opt) ~= nil then
opt = { opt, result }
else
opt = { result }
end
else
forced = not rule.dynamic_symbols
end
else
symbol = rule.symbol
end
if opts and #opts > 0 then
-- Options come from the map itself
task:insert_result(forced, symbol, score, opts)
else
if opt then
if type(opt) == 'table' then
task:insert_result(forced, symbol, score, fun.totable(fun.map(tostring, opt)))
else
task:insert_result(forced, symbol, score, tostring(opt))
end
else
task:insert_result(forced, symbol, score)
end
end
if rule.action then
local message = rule.message
if rule.message_func then
message = rule.message_func(task, rule.symbol, opt)
end
if message then
task:set_pre_result(rule.action, message, N)
else
task:set_pre_result(rule.action, 'Matched map: ' .. rule.symbol, N)
end
end
end
-- Match a single value for against a single rule
local function match_rule(r, value)
local function rule_callback(result)
if result then
if type(result) == 'table' then
for _, rs in ipairs(result) do
if type(rs) ~= 'userdata' then
rule_callback(rs)
end
end
return
end
local opt = value_types[r['type']].get_value(value)
insert_results(result, opt)
end
end
if r.filter or r.type == 'url' then
local fn = multimap_filters[r.type]
if fn then
local filtered_value = fn(task, r.filter, value, r)
lua_util.debugm(N, task, 'apply filter %s for rule %s: %s -> %s',
r.filter, r.symbol, value, filtered_value)
value = filtered_value
end
end
if type(value) == 'table' then
fun.each(function(elt)
match_element(r, elt, rule_callback)
end, value)
else
match_element(r, value, rule_callback)
end
end
-- Match list of values according to the field
local function match_list(r, ls, fields)
if ls then
if fields then
fun.each(function(e)
local match = e[fields[1]]
if match then
if fields[2] then
match = fields[2](match)
end
match_rule(r, match)
end
end, ls)
else
fun.each(function(e)
match_rule(r, e)
end, ls)
end
end
end
local function match_addr(r, addr)
match_list(r, addr, { 'addr' })
if not r.filter then
match_list(r, addr, { 'domain' })
match_list(r, addr, { 'user' })
end
end
local function match_url(r, url)
match_rule(r, url)
end
local function match_hostname(r, hostname)
match_rule(r, hostname)
end
local function match_filename(r, fn)
match_rule(r, fn)
end
local function match_received_header(r, pos, total, h)
local use_tld = false
local filter = r['filter'] or 'real_ip'
if filter:match('^tld:') then
filter = filter:sub(5)
use_tld = true
end
local v = h[filter]
if v then
local min_pos = tonumber(r['min_pos'])
local max_pos = tonumber(r['max_pos'])
if min_pos then
if min_pos < 0 then
if min_pos == -1 then
if (pos ~= total) then
return
end
else
if pos <= (total - (min_pos * -1)) then
return
end
end
elseif pos < min_pos then
return
end
end
if max_pos then
if max_pos < -1 then
if (total - (max_pos * -1)) >= pos then
return
end
elseif max_pos > 0 then
if pos > max_pos then
return
end
end
end
local match_flags = r['flags']
local nmatch_flags = r['nflags']
if match_flags or nmatch_flags then
local got_flags = h['flags']
if match_flags then
for _, flag in ipairs(match_flags) do
if not got_flags[flag] then
return
end
end
end
if nmatch_flags then
for _, flag in ipairs(nmatch_flags) do
if got_flags[flag] then
return
end
end
end
end
if filter == 'real_ip' or filter == 'from_ip' then
if type(v) == 'string' then
v = rspamd_ip.from_string(v)
end
if v and v:is_valid() then
match_rule(r, v)
end
else
if use_tld and type(v) == 'string' then
v = rspamd_util.get_tld(v)
end
match_rule(r, v)
end
end
end
local function match_content(r)
local data
if r['filter'] then
data = apply_content_filter(task, r['filter'], r)
else
data = { task:get_content() }
end
for _, v in ipairs(data) do
match_rule(r, v)
end
end
if rule.expression and not rule.combined then
local res, trace = rule['expression']:process_traced(task)
if not res or res == 0 then
lua_util.debugm(N, task, 'condition is false for %s',
rule.symbol)
return
else
lua_util.debugm(N, task, 'condition is true for %s: %s',
rule.symbol,
trace)
end
end
local process_rule_funcs = {
ip = function()
local ip = task:get_from_ip()
if ip and ip:is_valid() then
match_rule(rule, ip)
end
end,
dnsbl = function()
local ip = task:get_from_ip()
if ip and ip:is_valid() then
local to_resolve = ip_to_rbl(ip, rule['map'])
local function dns_cb(_, _, results, err)
lua_util.debugm(N, rspamd_config,
'resolve() finished: results=%1, err=%2, to_resolve=%3',
results, err, to_resolve)
if err and
(err ~= 'requested record is not found' and
err ~= 'no records with this name') then
rspamd_logger.errx(task, 'error looking up %s: %s', to_resolve, results)
elseif results then
task:insert_result(rule['symbol'], 1, rule['map'])
if rule.action then
task:set_pre_result(rule['action'],
'Matched map: ' .. rule['symbol'], N)
end
end
end
task:get_resolver():resolve_a({
task = task,
name = to_resolve,
callback = dns_cb,
forced = true
})
end
end,
header = function()
if type(rule['header']) == 'table' then
for _, rh in ipairs(rule['header']) do
local hv = task:get_header_full(rh)
match_list(rule, hv, { 'decoded' })
end
else
local hv = task:get_header_full(rule['header'])
match_list(rule, hv, { 'decoded' })
end
end,
rcpt = function()
if task:has_recipients('smtp') then
local rcpts = task:get_recipients('smtp')
match_addr(rule, rcpts)
elseif task:has_recipients('mime') then
local rcpts = task:get_recipients('mime')
match_addr(rule, rcpts)
end
end,
from = function()
if task:has_from('smtp') then
local from = task:get_from('smtp')
match_addr(rule, from)
elseif task:has_from('mime') then
local from = task:get_from('mime')
match_addr(rule, from)
end
end,
helo = function()
local helo = task:get_helo()
if helo then
match_hostname(rule, helo)
end
end,
url = function()
if task:has_urls() then
local msg_urls = task:get_urls()
for _, url in ipairs(msg_urls) do
match_url(rule, url)
end
end
end,
user = function()
local user = task:get_user()
if user then
match_rule(rule, user)
end
end,
filename = function()
local parts = task:get_parts()
local function filter_parts(p)
return p:is_attachment() or (not p:is_text()) and (not p:is_multipart())
end
local function filter_archive(p)
local ext = p:get_detected_ext()
local det_type = 'unknown'
if ext then
local lua_magic_types = require "lua_magic/types"
local det_t = lua_magic_types[ext]
if det_t then
det_type = det_t.type
end
end
return p:is_archive() and det_type == 'archive' and not rule.skip_archives
end
for _, p in fun.iter(fun.filter(filter_parts, parts)) do
if filter_archive(p) then
local fnames = p:get_archive():get_files(1000)
for _, fn in ipairs(fnames) do
match_filename(rule, fn)
end
end
local fn = p:get_filename()
if fn then
match_filename(rule, fn)
end
-- Also deal with detected content type
if not rule.skip_detected then
local ext = p:get_detected_ext()
if ext then
local fake_fname = string.format('detected.%s', ext)
lua_util.debugm(N, task, 'detected filename %s',
fake_fname)
match_filename(rule, fake_fname)
end
end
end
end,
content = function()
match_content(rule)
end,
hostname = function()
local hostname = task:get_hostname()
if hostname then
match_hostname(rule, hostname)
end
end,
asn = function()
local asn = task:get_mempool():get_variable('asn')
if asn then
match_rule(rule, asn)
end
end,
country = function()
local country = task:get_mempool():get_variable('country')
if country then
match_rule(rule, country)
end
end,
mempool = function()
local var = task:get_mempool():get_variable(rule['variable'])
if var then
match_rule(rule, var)
end
end,
symbol_options = function()
local sym = task:get_symbol(rule['target_symbol'])
if sym and sym[1].options then
for _, o in ipairs(sym[1].options) do
match_rule(rule, o)
end
end
end,
received = function()
local hdrs = task:get_received_headers()
if hdrs and hdrs[1] then
if not rule['artificial'] then
hdrs = fun.filter(function(h)
return not h['flags']['artificial']
end, hdrs):totable()
end
for pos, h in ipairs(hdrs) do
match_received_header(rule, pos, #hdrs, h)
end
end
end,
selector = function()
local elts = rule.selector(task)
if elts then
if type(elts) == 'table' then
for _, elt in ipairs(elts) do
match_rule(rule, elt)
end
else
match_rule(rule, elts)
end
end
end,
combined = function()
local ret, trace = rule.combined:process(task)
if ret and ret ~= 0 then
for n, t in pairs(trace) do
insert_results(t.value, string.format("%s=%s",
n, t.matched))
end
end
end,
}
local rt = rule.type
local process_func = process_rule_funcs[rt]
if process_func then
process_func()
else
rspamd_logger.errx(task, 'Unrecognised rule type: %s', rt)
end
end
local function gen_multimap_callback(rule)
return function(task)
multimap_callback(task, rule)
end
end
local function multimap_on_load_gen(rule)
return function()
lua_util.debugm(N, rspamd_config, "loaded map object for rule %s", rule['symbol'])
local known_symbols = {}
rule.map_obj:foreach(function(key, value)
local r, symbol, score, _ = parse_multimap_value(rule, value)
if r and symbol and not known_symbols[symbol] then
lua_util.debugm(N, rspamd_config, "%s: adding new symbol %s (score = %s), triggered by %s",
rule.symbol, symbol, score, key)
rspamd_config:register_symbol {
name = value,
parent = rule.callback_id,
type = 'virtual',
score = score,
}
rspamd_config:set_metric_symbol({
group = N,
score = 1.0, -- In future, we will parse score from `get_value` and use it as multiplier
description = 'Automatic symbol generated by rule: ' .. rule.symbol,
name = value,
})
known_symbols[value] = true
end
end)
end
end
local function add_multimap_rule(key, newrule)
local ret = false
local function multimap_load_kv_map(rule)
if rule['regexp'] then
if rule['multi'] then
rule.map_obj = lua_maps.map_add_from_ucl(rule.map, 'regexp_multi',
rule.description)
else
rule.map_obj = lua_maps.map_add_from_ucl(rule.map, 'regexp',
rule.description)
end
elseif rule['glob'] then
if rule['multi'] then
rule.map_obj = lua_maps.map_add_from_ucl(rule.map, 'glob_multi',
rule.description)
else
rule.map_obj = lua_maps.map_add_from_ucl(rule.map, 'glob',
rule.description)
end
else
rule.map_obj = lua_maps.map_add_from_ucl(rule.map, 'hash',
rule.description)
end
end
local known_generic_types = {
header = true,
rcpt = true,
from = true,
helo = true,
symbol_options = true,
filename = true,
url = true,
user = true,
content = true,
hostname = true,
asn = true,
country = true,
mempool = true,
selector = true,
combined = true
}
if newrule['message_func'] then
newrule['message_func'] = assert(load(newrule['message_func']))()
end
if newrule['url'] and not newrule['map'] then
newrule['map'] = newrule['url']
end
if not (newrule.map or newrule.rules) then
rspamd_logger.errx(rspamd_config, 'incomplete rule, missing map')
return nil
end
if not newrule['symbol'] and key then
newrule['symbol'] = key
elseif not newrule['symbol'] then
rspamd_logger.errx(rspamd_config, 'incomplete rule, missing symbol')
return nil
end
if not newrule['description'] then
newrule['description'] = string.format('multimap, type %s: %s', newrule['type'],
newrule['symbol'])
end
if newrule['type'] == 'mempool' and not newrule['variable'] then
rspamd_logger.errx(rspamd_config, 'mempool map requires variable')
return nil
end
if newrule['type'] == 'selector' then
if not newrule['selector'] then
rspamd_logger.errx(rspamd_config, 'selector map requires selector definition')
return nil
else
local selector = lua_selectors.create_selector_closure(
rspamd_config, newrule['selector'], newrule['delimiter'] or "")
if not selector then
rspamd_logger.errx(rspamd_config, 'selector map has invalid selector: "%s", symbol: %s',
newrule['selector'], newrule['symbol'])
return nil
end
newrule.selector = selector
end
end
if type(newrule['map']) == 'string' and
string.find(newrule['map'], '^redis://.*$') then
if not redis_params then
rspamd_logger.infox(rspamd_config, 'no redis servers are specified, ' ..
'cannot add redis map %s: %s', newrule['symbol'], newrule['map'])
return nil
end
newrule['redis_key'] = string.match(newrule['map'], '^redis://(.*)$')
if newrule['redis_key'] then
ret = true
end
elseif type(newrule['map']) == 'string' and
string.find(newrule['map'], '^redis%+selector://.*$') then
if not redis_params then
rspamd_logger.infox(rspamd_config, 'no redis servers are specified, ' ..
'cannot add redis map %s: %s', newrule['symbol'], newrule['map'])
return nil
end
local selector_str = string.match(newrule['map'], '^redis%+selector://(.*)$')
local selector = lua_selectors.create_selector_closure(
rspamd_config, selector_str, newrule['delimiter'] or "")
if not selector then
rspamd_logger.errx(rspamd_config, 'redis selector map has invalid selector: "%s", symbol: %s',
selector_str, newrule['symbol'])
return nil
end
newrule['redis_key'] = selector
ret = true
elseif newrule.type == 'combined' then
local lua_maps_expressions = require "lua_maps_expressions"
newrule.combined = lua_maps_expressions.create(rspamd_config,
{
rules = newrule.rules,
expression = newrule.expression,
on_load = newrule.dynamic_symbols and multimap_on_load_gen(newrule) or nil,
}, N, 'Combined map for ' .. newrule.symbol)
if not newrule.combined then
rspamd_logger.errx(rspamd_config, 'cannot add combined map for %s', newrule.symbol)
else
ret = true
end
else
if newrule['type'] == 'ip' then
newrule.map_obj = lua_maps.map_add_from_ucl(newrule.map, 'radix',
newrule.description)
if newrule.map_obj then
ret = true
else
rspamd_logger.warnx(rspamd_config, 'Cannot add rule: map doesn\'t exists: %1',
newrule['map'])
end
elseif newrule['type'] == 'received' then
if type(newrule['flags']) == 'table' and newrule['flags'][1] then
newrule['flags'] = newrule['flags']
elseif type(newrule['flags']) == 'string' then
newrule['flags'] = { newrule['flags'] }
end
if type(newrule['nflags']) == 'table' and newrule['nflags'][1] then
newrule['nflags'] = newrule['nflags']
elseif type(newrule['nflags']) == 'string' then
newrule['nflags'] = { newrule['nflags'] }
end
local filter = newrule['filter'] or 'real_ip'
if filter == 'real_ip' or filter == 'from_ip' then
newrule.map_obj = lua_maps.map_add_from_ucl(newrule.map, 'radix',
newrule.description)
if newrule.map_obj then
ret = true
else
rspamd_logger.warnx(rspamd_config, 'Cannot add rule: map doesn\'t exists: %1',
newrule['map'])
end
else
multimap_load_kv_map(newrule)
if newrule.map_obj then
ret = true
else
rspamd_logger.warnx(rspamd_config, 'Cannot add rule: map doesn\'t exists: %1',
newrule['map'])
end
end
elseif known_generic_types[newrule.type] then
if newrule.filter == 'ip_addr' then
newrule.map_obj = lua_maps.map_add_from_ucl(newrule.map, 'radix',
newrule.description)
elseif not newrule.combined then
multimap_load_kv_map(newrule)
end
if newrule.map_obj then
ret = true
else
rspamd_logger.warnx(rspamd_config, 'Cannot add rule: map doesn\'t exists: %1',
newrule['map'])
end
elseif newrule['type'] == 'dnsbl' then
ret = true
end
end
if ret then
if newrule.map_obj and newrule.dynamic_symbols then
newrule.map_obj:on_load(multimap_on_load_gen(newrule))
end
if newrule['type'] == 'symbol_options' then
rspamd_config:register_dependency(newrule['symbol'], newrule['target_symbol'])
end
if newrule['require_symbols'] then
local atoms = {}
local function parse_atom(str)
local atom = table.concat(fun.totable(fun.take_while(function(c)
if string.find(', \t()><+!|&\n', c, 1, true) then
return false
end
return true
end, fun.iter(str))), '')
table.insert(atoms, atom)
return atom
end
local function process_atom(atom, task)
local f_ret = task:has_symbol(atom)
lua_util.debugm(N, rspamd_config, 'check for symbol %s: %s', atom, f_ret)
if f_ret then
return 1
end
return 0
end
local expression = rspamd_expression.create(newrule['require_symbols'],
{ parse_atom, process_atom }, rspamd_config:get_mempool())
if expression then
newrule['expression'] = expression
fun.each(function(v)
lua_util.debugm(N, rspamd_config, 'add dependency %s -> %s',
newrule['symbol'], v)
rspamd_config:register_dependency(newrule['symbol'], v)
end, atoms)
end
end
return newrule
end
return nil
end
-- Registration
local opts = rspamd_config:get_all_opt(N)
if opts and type(opts) == 'table' then
redis_params = rspamd_parse_redis_server(N)
for k, m in pairs(opts) do
if type(m) == 'table' and m['type'] then
local rule = add_multimap_rule(k, m)
if not rule then
rspamd_logger.errx(rspamd_config, 'cannot add rule: "' .. k .. '"')
else
rspamd_logger.infox(rspamd_config, 'added multimap rule: %s (%s)',
k, rule.type)
table.insert(rules, rule)
end
end
end
-- add fake symbol to check all maps inside a single callback
fun.each(function(rule)
local augmentations = {}
if rule.action then
table.insert(augmentations, 'passthrough')
end
local id = rspamd_config:register_symbol({
type = 'normal',
name = rule['symbol'],
augmentations = augmentations,
callback = gen_multimap_callback(rule),
})
rule.callback_id = id
if rule['symbols'] then
-- Find allowed symbols by this map
rule['symbols_set'] = {}
fun.each(function(s)
rspamd_config:register_symbol({
type = 'virtual',
name = s,
parent = id,
score = tonumber(rule.score or "0") or 0, -- Default score
})
rule['symbols_set'][s] = 1
end, rule['symbols'])
end
if not rule.score then
rspamd_logger.infox(rspamd_config, 'set default score 0 for multimap rule %s', rule.symbol)
rule.score = 0
end
if rule.score then
-- Register metric symbol
rule.name = rule.symbol
rule.description = rule.description or 'multimap symbol'
rule.group = rule.group or N
local tmp_flags
tmp_flags = rule.flags
if rule.type == 'received' and rule.flags then
-- XXX: hack to allow received flags/nflags
-- See issue #3526 on GH
rule.flags = nil
end
-- XXX: for combined maps we use trace, so flags must include one_shot to avoid scores multiplication
if rule.combined and not rule.flags then
rule.flags = 'one_shot'
end
rspamd_config:set_metric_symbol(rule)
rule.flags = tmp_flags
end
end, rules)
if #rules == 0 then
lua_util.disable_module(N, "config")
end
end
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