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-- This plugin is designed for testing received headers via rbl
-- Configuration:
-- .module 'received_rbl' {
-- rbl = "insecure-bl.rambler.ru";
-- rbl = "xbl.spamhaus.org";
-- metric = "default";
-- symbol = "RECEIVED_RBL";
-- };
local metric = 'default'
local symbol = 'RECEIVED_RBL'
local rbls = {}
function dns_cb(task, to_resolve, results, err)
if results then
local _,_,rbl = string.find(to_resolve, '%d+\.%d+\.%d+\.%d+\.(.+)')
task:insert_result(metric, symbol, 1, rbl)
end
end
function received_cb (task)
local recvh = task:get_received_headers()
for _,rh in ipairs(recvh) do
for k,v in pairs(rh) do
if k == 'real_ip' then
local _,_,o1,o2,o3,o4 = string.find(v, '(%d+)\.(%d+)\.(%d+)\.(%d+)')
for _,rbl in ipairs(rbls) do
rbl_str = o4 .. '.' .. o3 .. '.' .. o2 .. '.' .. o1 .. '.' .. rbl
task:resolve_dns_a(rbl_str, 'dns_cb')
end
end
end
end
end
-- Configuration
local opts = rspamd_config:get_all_opt('received_rbl')
if opts then
for n,v in pairs(opts) do
if n == 'rbl' then
table.insert(rbls, v)
elseif n == 'metric' then
metric = v
elseif n == 'symbol' then
symbol = v
end
end
end
-- Register symbol's callback
local m = rspamd_config:get_metric(metric)
m:register_symbol(symbol, 1.0, 'received_cb')
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