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local rbls = {}
local rspamd_logger = require "rspamd_logger"
local function ip_to_rbl(ip, rbl)
return table.concat(ip:inversed_str_octets(), ".") .. '.' .. rbl
end
local function rbl_cb (task)
local function rbl_dns_cb(resolver, to_resolve, results, err, key)
if results then
local thisrbl = nil
for k,r in pairs(rbls) do
if k == key then
thisrbl = r
break
end
end
if thisrbl ~= nil then
if thisrbl['returncodes'] == nil then
if thisrbl['symbol'] ~= nil then
task:insert_result(thisrbl['symbol'], 1)
end
else
for _,result in pairs(results) do
local ipstr = result:to_string()
local foundrc = false
for s,i in pairs(thisrbl['returncodes']) do
if type(i) == 'string' then
if string.find(ipstr, "^" .. i .. "$") then
foundrc = true
task:insert_result(s, 1)
break
end
elseif type(i) == 'table' then
for _,v in pairs(i) do
if string.find(ipstr, "^" .. v .. "$") then
foundrc = true
task:insert_result(s, 1)
break
end
end
end
end
if not foundrc then
if thisrbl['unknown'] and thisrbl['symbol'] then
task:insert_result(thisrbl['symbol'], 1)
else
rspamd_logger.err('RBL ' .. thisrbl['rbl'] ..
' returned unknown result ' .. ipstr)
end
end
end
end
end
end
task:inc_dns_req()
end
local havegot = {}
local notgot = {}
local function check_user()
if not havegot['user'] and not notgot['user'] then
havegot['user'] = task:get_user()
if havegot['user'] == nil then
notgot['user'] = true
end
end
if havegot['user'] ~= nil then
return true
end
return false
end
for k,rbl in pairs(rbls) do
if rbl['helo'] then
(function()
if notgot['helo'] then
return
end
if not havegot['helo'] then
havegot['helo'] = task:get_helo()
if havegot['helo'] == nil or string.sub(havegot['helo'],1,1) == '[' then
notgot['helo'] = true
return
end
end
if rbl['user'] == false and check_user() == true then
return
end
task:get_resolver():resolve_a(task:get_session(), task:get_mempool(),
havegot['helo'] .. '.' .. rbl['rbl'], rbl_dns_cb, k)
end)()
end
if rbl['rdns'] then
(function()
if notgot['rdns'] then
return
end
if not havegot['rdns'] then
havegot['rdns'] = task:get_hostname()
if havegot['rdns'] == nil or havegot['rdns'] == 'unknown' then
notgot['rdns'] = true
return
end
end
if rbl['user'] == false and check_user() == true then
return
end
task:get_resolver():resolve_a(task:get_session(), task:get_mempool(),
havegot['rdns'] .. '.' .. rbl['rbl'], rbl_dns_cb, k)
end)()
end
if rbl['from'] then
(function()
if notgot['from'] then
return
end
if not havegot['from'] then
havegot['from'] = task:get_from_ip()
if havegot['from'] == nil then
notgot['from'] = true
return
end
end
if (havegot['from']:get_version() == 6 and rbl['ipv6']) or
(havegot['from']:get_version() == 4 and rbl['ipv4']) then
if rbl['user'] == false and check_user() == true then
return
end
task:get_resolver():resolve_a(task:get_session(), task:get_mempool(),
ip_to_rbl(havegot['from'], rbl['rbl']), rbl_dns_cb, k)
end
end)()
end
if rbl['received'] then
(function()
if notgot['received'] then
return
end
if not havegot['received'] then
havegot['received'] = task:get_received_headers()
if havegot['received'] == nil then
notgot['received'] = true
return
end
end
if rbl['user'] == false and check_user() == true then
return
end
for _,rh in ipairs(havegot['received']) do
if rh['real_ip'] and rh['real_ip']:to_string() ~= '0.0.0.0' then
for k,rbl in pairs(rbls) do
if (rh['real_ip']:get_version() == 6 and rbl['ipv6']) or
(rh['real_ip']:get_version() == 4 and rbl['ipv4']) then
task:get_resolver():resolve_a(task:get_session(), task:get_mempool(),
ip_to_rbl(rh['real_ip'], rbl['rbl']), rbl_dns_cb, k)
end
end
end
end
end)()
end
end
end
-- Registration
if type(rspamd_config.get_api_version) ~= 'nil' then
if rspamd_config:get_api_version() >= 1 then
rspamd_config:register_module_option('rbl', 'rbls', 'map')
rspamd_config:register_module_option('rbl', 'default_ipv4', 'string')
rspamd_config:register_module_option('rbl', 'default_ipv6', 'string')
rspamd_config:register_module_option('rbl', 'default_received', 'string')
rspamd_config:register_module_option('rbl', 'default_from', 'string')
rspamd_config:register_module_option('rbl', 'default_rdns', 'string')
rspamd_config:register_module_option('rbl', 'default_helo', 'string')
rspamd_config:register_module_option('rbl', 'default_unknown', 'string')
rspamd_config:register_module_option('rbl', 'default_user', 'string')
end
end
-- Configuration
local opts = rspamd_config:get_all_opt('rbl')
if not opts or type(opts) ~= 'table' then
return
end
if(opts['default_ipv4'] == nil) then
opts['default_ipv4'] = true
end
if(opts['default_ipv6'] == nil) then
opts['default_ipv6'] = false
end
if(opts['default_received'] == nil) then
opts['default_received'] = true
end
if(opts['default_from'] == nil) then
opts['default_from'] = false
end
if(opts['default_unknown'] == nil) then
opts['default_unknown'] = false
end
if(opts['default_rdns'] == nil) then
opts['default_rdns'] = false
end
if(opts['default_helo'] == nil) then
opts['default_helo'] = false
end
if(opts['default_user'] == nil) then
opts['default_user'] = true
end
for key,rbl in pairs(opts['rbls']) do
local o = { "ipv4", "ipv6", "from", "received", "unknown", "rdns", "helo", "user" }
for i=1,table.maxn(o) do
if(rbl[o[i]] == nil) then
rbl[o[i]] = opts['default_' .. o[i]]
end
end
if type(rbl['returncodes']) == 'table' then
for s,_ in pairs(rbl['returncodes']) do
if type(rspamd_config.get_api_version) ~= 'nil' then
rspamd_config:register_virtual_symbol(s, 1)
end
end
end
if not rbl['symbol'] and type(rbl['returncodes']) ~= 'nil' and not rbl['unknown'] then
rbl['symbol'] = key
end
if type(rspamd_config.get_api_version) ~= 'nil' and rbl['symbol'] then
rspamd_config:register_virtual_symbol(rbl['symbol'], 1)
end
rbls[key] = rbl
end
rspamd_config:register_callback_symbol_priority('RBL', 1.0, 0, rbl_cb)
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