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local argparse = require 'argparse'
local redis = require 'lua_redis'
local logger = require 'rspamd_logger'
local parser = argparse()
:name "ratelimit"
:description "Manage ratelimit functional"
:help_description_margin(32)
:command_target('command')
:require_command(true)
parser:option "-c --config"
:description "Path to config file"
:argname("<cfg>")
:default(rspamd_paths["CONFDIR"] .. "/" .. "rspamd.conf")
local track_limits = parser:command 'track'
:description 'Track last limits of ratelimit module'
track_limits:option "-q --quantity"
:description("Number of limits to track")
:argname("<quantity>")
:default(1)
local upgrade_bucket = parser:command 'upgrade'
:description 'Upgrade certain bucket or top limit bucket'
upgrade_bucket:argument "prefix"
:description("Prefix of bucket to operate with")
:args("?")
upgrade_bucket:option "-b --burst"
:description("Burst to set")
:argname("<burst>")
:args("?")
upgrade_bucket:option "-r --rate"
:description("Rate to set")
:argname("<rate>")
:args("?")
upgrade_bucket:option "-s --symbol"
:description("Symbol to set")
:argname("<symbol>")
:args("?")
upgrade_bucket:option "-B --dynamic_burst"
:description("Dynamic burst to set")
:argname("<dynb>")
:args("?")
upgrade_bucket:option "-R --dynamic_rate"
:description("Dynamic rate to set")
:argname("<dynr>")
:args("?")
local unblock_bucket = parser:command 'unblock'
:description 'Unblock certain bucket or number of buckets(default: 1)'
parser:mutex(
unblock_bucket:argument "prefix"
:description("Prefix of bucket to operate with")
:args(1),
unblock_bucket:argument "quantity"
:description("Number of buckets to ublock")
:default(1)
)
local redis_params
local lfb_cache_prefix = 'RL_cache_prefix'
local redis_attrs = {
config = rspamd_config,
ev_base = rspamadm_ev_base,
session = rspamadm_session,
log_obj = rspamd_config,
resolver = rspamadm_dns_resolver,
}
local function track_limits_handler(args)
for i = 1, args.quantity do
local res, prefix = redis.request(redis_params, redis_attrs,
{ 'ZRANGE', lfb_cache_prefix, -i, -i })
if not res then
logger.errx('Redis request error: %s', prefix)
os.exit(1)
end
if #prefix == 1 then
local _, bucket_params = redis.request(redis_params, redis_attrs,
{ 'HMGET', tostring(prefix[1]), 'l', 'b', 'r', 'dr', 'db' })
local last = tonumber(bucket_params[1])
local burst = tonumber(bucket_params[2])
local rate = tonumber(bucket_params[3])
local dynr = tonumber(bucket_params[4]) / 10000.0
local dynb = tonumber(bucket_params[5]) / 10000.0
print(string.format('prefix: %s, last: %s, burst: %s, rate: %s, dynamic_rate: %s, dynamic_burst: %s',
prefix[1], last, burst, rate, dynr, dynb))
end
end
end
local function upgrade_bucket_handler(args)
local prefix = args.prefix
if prefix == nil or prefix == "" then
local res = nil
res, prefix = redis.request(redis_params, redis_attrs,
{ 'ZRANGE', lfb_cache_prefix, '-1', '-1' })
if res ~= 1 then
logger.errx('Redis request parameters are wrong')
os.exit(1)
end
end
if args.burst then
local res, err = redis.request(redis_params, redis_attrs,
{ 'HSET', tostring(prefix), 'b', tostring(args.burst) })
if not res then
logger.errx('Incorrect arguments for redis request for burst or prefix is incorrect: %s', err)
os.exit(1)
end
end
if args.rate then
local res, err = redis.request(redis_params, redis_attrs,
{ 'HSET', tostring(prefix), 'r', tostring(args.rate) })
if not res then
logger.errx('Incorrect arguments for redis request for rate or prefix is incorrect: %s', err)
os.exit(1)
end
end
if args.symbol then
local res, err = redis.request(redis_params, redis_attrs,
{ 'HSET', tostring(prefix), 's', tostring(args.symbol) })
if not res then
logger.errx('Incorrect arguments for redis request for symbol or prefix is incorrect: %s', err)
os.exit(1)
end
end
if args.dynb then
local res, err = redis.request(redis_params, redis_attrs,
{ 'HSET', tostring(prefix), 'db', tostring(args.dynb) })
if not res then
logger.errx('Incorrect arguments for redis request for dynamic burst or prefix is incorrect: %s', err)
os.exit(1)
end
end
if args.dynr then
local res, err = redis.request(redis_params, redis_attrs,
{ 'HSET', tostring(prefix), 'dr', tostring(args.dynr) })
if not res then
logger.errx('Incorrect arguments for redis request for dynamic rate or prefix is incorrect: %s', err)
os.exit(1)
end
end
end
local function unblock_bucket_helper(prefix)
local res, err = redis.request(redis_params, redis_attrs, { 'HSET', tostring(prefix), 'b', 0 })
if not res then
logger.errx('Failed to unblock bucket: %s', err)
os.exit(1)
end
end
local function unblock_buckets_handler(args)
for i = 1, args.quantity do
local res, prefix = redis.request(redis_params, redis_attrs,
{ 'ZRANGE', lfb_cache_prefix, -i, -i })
if not res then
logger.errx('Redis request parameters are wrong: %s', prefix)
os.exit(1)
end
unblock_bucket_helper(prefix)
end
end
local function unblock_bucket_handler(args)
if (args.prefix == nil or args.prefix == "") then
unblock_buckets_handler(args)
end
unblock_bucket_helper(args.prefix)
end
local command_handlers = {
track = track_limits_handler,
upgrade = upgrade_bucket_handler,
unblock = unblock_bucket_handler
}
local function handler(args)
local function load_config(opts)
local _r, err = rspamd_config:load_ucl(opts['config'])
if not _r then
logger.errx('cannot parse %s: %s', opts['config'], err)
os.exit(1)
end
_r, err = rspamd_config:parse_rcl({ 'logging', 'worker' })
if not _r then
logger.errx('cannot process %s: %s', opts['config'], err)
os.exit(1)
end
end
local cmd_opts = parser:parse(args)
load_config(cmd_opts)
redis_params = redis.parse_redis_server('ratelimit')
if not redis_params then
logger.errx(rspamd_config, 'no servers are specified, cannot work with rate limits')
os.exit(1)
end
local f = command_handlers[cmd_opts.command]
if not f then
parser:error(string.format("command isn't implemented: %s",
cmd_opts.command))
end
f(cmd_opts)
end
return {
name = 'ratelimit',
aliases = { 'ratelimit' },
handler = handler,
description = parser._description
}
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