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-- 0 or 1 received: = spam
local metric = 'default'
local symbol = 'ONCE_RECEIVED'
-- Symbol for strict checks
local symbol_strict = nil
local bad_hosts = {}
local good_hosts = {}
function check_quantity_received (task)
local recvh = task:get_received_headers()
print (symbol)
if table.maxn(recvh) <= 1 then
task:insert_result(metric, symbol, 1)
end
-- Strict checks
if symbol_strict then
local r = recvh[1]
-- Unresolved host
if not r['real_hostname'] or r['real_hostname'] == 'unknown' or string.match(r['real_hostname'], '(%d+)\.(%d+)\.(%d+)\.(%d+)') then
task:insert_result(metric, symbol_strict, 1)
end
local i = true
for _,h in ipairs(bad_hosts) do
if string.find(r['real_hostname'], h) then
-- Check for good hostname
for _,gh in ipairs(good_hosts) do
if string.find(r['real_hostname'], gh) then
i = false
break
end
end
if i then
task:insert_result(metric, symbol_strict, 1, h)
return
end
end
end
end
end
-- Configuration
local opts = rspamd_config:get_all_opt('once_received')
if opts then
if opts['symbol'] then
symbol = opts['symbol']
for n,v in pairs(opts) do
if n == 'symbol_strict' then
symbol_strict = v
elseif n == 'bad_host' then
table.insert(bad_hosts, v)
elseif n == 'good_host' then
table.insert(good_hosts, v)
elseif n == 'metric' then
metric = v
end
end
-- Register symbol's callback
local m = rspamd_config:get_metric(metric)
m:register_symbol(symbol, 1.0, 'check_quantity_received')
end
end
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