/*-
* Copyright 2016 Vsevolod Stakhov
*
* 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.
*/
#include "lua_common.h"
#include "libmime/message.h"
#include "libutil/expression.h"
#include "libserver/composites.h"
#include "lua/lua_map.h"
#include "utlist.h"
/***
* This module is used to configure rspamd and is normally available as global
* variable named `rspamd_config`. Unlike other modules, it is not necessary to
* require it before usage.
* @module rspamd_config
* @example
-- Register some callback symbol
local function foo(task)
-- do something
end
rspamd_config:register_symbol('SYMBOL', 1.0, foo)
-- Get configuration
local tab = rspamd_config:get_all_opt('module') -- get table for module's options
local opts = rspamd_config:get_key('options') -- get content of the specified key in rspamd configuration
*/
/* Config file methods */
/***
* @method rspamd_config:get_module_opt(mname, optname)
* Returns value of specified option `optname` for a module `mname`,
* @param {string} mname name of module
* @param {string} optname option to get
* @return {string or table} value of the option or `nil` if option is not found
*/
LUA_FUNCTION_DEF (config, get_module_opt);
/***
* @method rspamd_config:get_all_opt(mname)
* Returns value of all options for a module `mname`, flattening values into a single table consisting
* of all sections with such a name.
* @param {string} mname name of module
* @return {table} table of all options for `mname` or `nil` if a module's configuration is not found
*/
LUA_FUNCTION_DEF (config, get_all_opt);
/***
* @method rspamd_config:get_mempool()
* Returns static configuration memory pool.
* @return {mempool} [memory pool](mempool.md) object
*/
LUA_FUNCTION_DEF (config, get_mempool);
/***
* @method rspamd_config:add_radix_map(mapline[, description])
* Creates new dynamic map of IP/mask addresses.
* @param {string} mapline URL for a map
* @param {string} description optional map description
* @return {map} radix tree object
* @example
local ip_map = rspamd_config:add_radix_map ('file:///path/to/file', 'my radix map')
...
local function foo(task)
local ip = task:get_from_ip()
if ip_map:get_key(ip) then
return true
end
return false
end
*/
/***
* @method rspamd_config:radix_from_config(mname, optname)
* Creates new embedded map of IP/mask addresses from config.
* @param {string} mname name of module
* @param {string} optname option to get
* @return {map} radix tree object
* @example
local ip_map = rspamd_config:radix_from_config ('mymodule', 'ips')
...
local function foo(task)
local ip = task:get_from_ip()
if ip_map:get_key(ip) then
return true
end
return false
end
*/
/***
* @method rspamd_config:add_hash_map(mapline[, description])
* Creates new dynamic map string objects.
* @param {string} mapline URL for a map
* @param {string} description optional map description
* @return {map} hash set object
* @example
local hash_map = rspamd_config:add_hash_map ('file:///path/to/file', 'my hash map')
...
local function foo(task)
local from = task:get_from()
if hash_map:get_key(from['user']) then
return true
end
return false
end
*/
/***
* @method rspamd_config:add_kv_map(mapline[, description])
* Creates new dynamic map of key/values associations.
* @param {string} mapline URL for a map
* @param {string} description optional map description
* @return {map} hash table object
* @example
local kv_map = rspamd_config:add_kv_map ('file:///path/to/file', 'my kv map')
...
local function foo(task)
local from = task:get_from()
if from then
local value = kv_map:get_key(from['user'])
if value then
return true,value
end
end
return false
end
*/
/***
* @method rspamd_config:add_map({args})
* Creates new dynamic map according to the attributes passed.
*
* - `type`: type of map to be created, can be one of the following set:
* + `set`: set of strings
* + `radix`: map of IP addresses to strings
* + `map`: map of strings to strings
* + `regexp`: map of regexps to strings
* + `callback`: map processed by lua callback
* - `url`: url to load map from
* - `description`: map's description
* - `callback`: lua callback for the map
*
* @return {map} `true` if map has been added
* @example
local str = ''
local function process_map(in)
str = in
end
rspamd_config:add_map('http://example.com/map', "settings map", process_map)
*/
/***
* @method rspamd_config:get_classifier(name)
* Returns classifier config.
* @param {string} name name of classifier (e.g. `bayes`)
* @return {classifier} classifier object or `nil`
*/
LUA_FUNCTION_DEF (config, get_classifier);
/***
* @method rspamd_config:register_symbol(table)
* Register symbol of a specified type in rspamd. This function accepts table of arguments:
*
* - `name`: name of symbol (can be missing for callback symbols)
* - `callback`: function to be called for symbol's check (can be absent for virtual symbols)
* - `weight`: weight of symbol (should normally be 1 or missing)
* - `priority`: priority of symbol (normally 0 or missing)
* - `type`: type of symbol: `normal` (default), `virtual` or `callback`
* - `flags`: various flags splitted by commas or spaces:
* + `nice` if symbol can produce negative score;
* + `empty` if symbol can be called for empty messages
* + `skip` if symbol should be skipped now
* - `parent`: id of parent symbol (useful for virtual symbols)
*
* @return {number} id of symbol registered
*/
LUA_FUNCTION_DEF (config, register_symbol);
/***
* @method rspamd_config:register_symbols(callback, [weight], callback_name, [, symbol, ...])
* Register callback function to be called for a set of symbols with initial weight.
* @param {function} callback callback function to be called for a specified symbol
* @param {number} weight initial weight of symbol (can be less than zero to specify non-spam symbols)
* @param {string} callback_name symbolic name of callback
* @param {list of strings} symbol list of symbols registered by this function
*/
LUA_FUNCTION_DEF (config, register_symbols);
/***
* @method rspamd_config:register_virtual_symbol(name, weight,)
* Register virtual symbol that is not associated with any callback.
*
* **This method is deprecated and should not be used in newly written code **
* @param {string} virtual name symbol's name
* @param {number} weight initial weight of symbol (can be less than zero to specify non-spam symbols)
*/
LUA_FUNCTION_DEF (config, register_virtual_symbol);
/***
* @method rspamd_config:register_callback_symbol(name, weight, callback)
* Register callback function to be called for a specified symbol with initial weight. Symbol itself is
* not registered in the metric and is not intended to be visible by a user.
*
* **This method is deprecated and should not be used in newly written code **
* @param {string} name symbol's name (just for unique id purposes)
* @param {number} weight initial weight of symbol (can be less than zero to specify non-spam symbols)
* @param {function} callback callback function to be called for a specified symbol
*/
LUA_FUNCTION_DEF (config, register_callback_symbol);
LUA_FUNCTION_DEF (config, register_callback_symbol_priority);
/***
* @method rspamd_config:register_dependency(id, dep)
* Create a dependency between symbol identified by `id` and a symbol identified
* by some symbolic name `dep`
* @param {number|string} id id or name of source (numeric id is returned by all register_*_symbol)
* @param {string} dep dependency name
* @example
local function cb(task)
...
end
local id = rspamd_config:register_symbol('SYM', 1.0, cb)
rspamd_config:register_dependency(id, 'OTHER_SYM')
-- Alternative form
rspamd_config:register_dependency('SYMBOL_FROM', 'SYMBOL_TO')
*/
LUA_FUNCTION_DEF (config, register_dependency);
/**
* @method rspamd_config:set_metric_symbol({table})
* Set the value of a specified symbol in a metric. This function accepts table with the following elements:
*
* - `name`: name of symbol (string)
* - `score`: score for symbol (number)
* - `metric`: name of metric (string, optional)
* - `description`: description of symbol (string, optional)
* - `group`: name of group for symbol (string, optional)
* - `one_shot`: turn off multiple hits for a symbol (boolean, optional)
* - `flags`: comma separated string of flags:
* + `ignore`: do not strictly check validity of symbol and corresponding rule
* + `one_shot`: turn off multiple hits for a symbol
* - `priority`: priority of symbol's definition
*/
LUA_FUNCTION_DEF (config, set_metric_symbol);
/**
* @method rspamd_config:set_metric_action({table})
* Set the score of a specified action in a metric. This function accepts table with the following elements:
*
* - `action`: name of action (string)
* - `score`: score for action (number)
* - `metric`: name of metric (string, optional)
* - `priority`: priority of symbol's definition
*/
LUA_FUNCTION_DEF (config, set_metric_action);
/**
* @method rspamd_config:add_composite(name, expression)
* @param {string} name name of composite symbol
* @param {string} expression symbolic expression of the composite rule
* @return {bool} true if a composite has been added successfully
*/
LUA_FUNCTION_DEF (config, add_composite);
/***
* @method rspamd_config:register_pre_filter(callback[, order])
* Register function to be called prior to symbols processing.
* @param {function} callback callback function
* @param {number} order filters are called from lower orders to higher orders, order is equal to 0 by default
* @example
local function check_function(task)
-- It is possible to manipulate the task object here: set settings, set pre-action and so on
...
end
rspamd_config:register_pre_filter(check_function)
*/
LUA_FUNCTION_DEF (config, register_pre_filter);
/***
* @method rspamd_config:register_post_filter(callback[, order])
* Register function to be called after symbols are processed.
*
* @param {function} callback callback function
* @param {number} order filters are called from lower orders to higher orders, order is equal to 0 by default
*/
LUA_FUNCTION_DEF (config, register_post_filter);
/* XXX: obsoleted */
LUA_FUNCTION_DEF (config, register_module_option);
/* XXX: not needed now */
LUA_FUNCTION_DEF (config, get_api_version);
/***
* @method rspamd_config:get_key(name)
* Returns configuration section with the specified `name`.
* @param {string} name name of config section
* @return {variant} specific value of section
* @example
local set_section = rspamd_config:get_key("settings")
if type(set_section) == "string" then
-- Just a map of ucl
if rspamd_config:add_map(set_section, "settings map", process_settings_map) then
rspamd_config:register_pre_filter(check_settings)
end
elseif type(set_section) == "table" then
if process_settings_table(set_section) then
rspamd_config:register_pre_filter(check_settings)
end
end
*/
LUA_FUNCTION_DEF (config, get_key);
/***
* @method rspamd_config:add_condition(symbol, condition)
* Adds condition callback for specified symbol
* @param {string} symbol symbol's name
* @param {function} condition condition callback
* @return {boolean} true if condition has been added
* @example
rspamd_config:add_condition('FUZZY_DENIED', function(task)
if some_map:find_key(task:get_from()) then return false end
return true
end)
*/
LUA_FUNCTION_DEF (config, add_condition);
/***
* @method rspamd_config:__newindex(name, callback)
* This metamethod is called if new indicies are added to the `rspamd_config` object.
* Technically, it is the equialent of @see rspamd_config:register_symbol where `weight` is 1.0.
* There is also table form invocation that allows to control more things:
*
* - `callback`: has the same meaning and acts as function of task
* - `score`: default score for a symbol
* - `group`: default group for a symbol
* - `description`: default symbol's description
* - `priority`: additional priority value
* - `one_shot`: default value for one shot attribute
* - `condition`: function of task that can enable or disable this specific rule's execution
* @param {string} name index name
* @param {function/table} callback callback to be called
* @return {number} id of the new symbol added
* @example
rspamd_config.R_EMPTY_IMAGE = function (task)
parts = task:get_text_parts()
if parts then
for _,part in ipairs(parts) do
if part:is_empty() then
images = task:get_images()
if images then
-- Symbol `R_EMPTY_IMAGE` is inserted
return true
end
return false
end
end
end
return false
end
rspamd_config.SYMBOL = {
callback = function(task)
...
end,
score = 5.1,
description = 'sample symbol',
group = 'sample symbols',
condition = function(task)
if task:get_from()[1]['addr'] == 'user@example.com' then
return false
end
return true
end
}
*/
LUA_FUNCTION_DEF (config, newindex);
/***
* @method rspamd_config:register_regexp(params)
* Registers new re for further cached usage
* Params is the table with the follwoing fields (mandatory fields are marked with `*`):
* - `re`* : regular expression object
* - `type`*: type of regular expression:
* + `mime`: mime regexp
* + `rawmime`: raw mime regexp
* + `header`: header regexp
* + `rawheader`: raw header expression
* + `body`: raw body regexp
* + `url`: url regexp
* - `header`: for header and rawheader regexp means the name of header
* - `pcre_only`: flag regexp as pcre only regexp
*/
LUA_FUNCTION_DEF (config, register_regexp);
/***
* @method rspamd_config:replace_regexp(params)
* Replaces regexp with a new one
* Params is the table with the follwoing fields (mandatory fields are marked with `*`):
* - `old_re`* : old regular expression object (must be in the cache)
* - `new_re`* : old regular expression object (must not be in the cache)
*/
LUA_FUNCTION_DEF (config, replace_regexp);
/***
* @method rspamd_config:register_worker_script(worker_type, script)
* Registers the following script for workers of a specified type. The exact type
* of script function depends on worker type
* @param {string} worker_type worker type (e.g. "normal")
* @param {function} script script for a worker
* @return {boolean} `true` if a script has been registered
*/
LUA_FUNCTION_DEF (config, register_worker_script);
/***
* @method rspamd_config:add_on_load(function(cfg) ... end)
* Registers the following script to be executed when configuration is completely loaded
* @param {function} script function to be executed
*/
LUA_FUNCTION_DEF (config, add_on_load);
/***
* @method rspamd_config:get_symbols_count()
* Returns number of symbols registered in rspamd configuration
* @return {number} number of symbols registered in the configuration
*/
LUA_FUNCTION_DEF (config, get_symbols_count);
/***
* @method rspamd_config:get_symbol_callback(name)
* Returns callback function for the specified symbol if it is a lua registered callback
* @return {function} callback function or nil
*/
LUA_FUNCTION_DEF (config, get_symbol_callback);
/***
* @method rspamd_config:set_symbol_callback(name, callback)
* Sets callback for the specified symbol
* @return {boolean} true if function has been replaced
*/
LUA_FUNCTION_DEF (config, set_symbol_callback);
static const struct luaL_reg configlib_m[] = {
LUA_INTERFACE_DEF (config, get_module_opt),
LUA_INTERFACE_DEF (config, get_mempool),
LUA_INTERFACE_DEF (config, get_all_opt),
LUA_INTERFACE_DEF (config, add_radix_map),
LUA_INTERFACE_DEF (config, radix_from_config),
LUA_INTERFACE_DEF (config, add_hash_map),
LUA_INTERFACE_DEF (config, add_kv_map),
LUA_INTERFACE_DEF (config, add_map),
LUA_INTERFACE_DEF (config, get_classifier),
LUA_INTERFACE_DEF (config, register_symbol),
LUA_INTERFACE_DEF (config, register_symbols),
LUA_INTERFACE_DEF (config, register_virtual_symbol),
LUA_INTERFACE_DEF (config, register_callback_symbol),
LUA_INTERFACE_DEF (config, register_callback_symbol_priority),
LUA_INTERFACE_DEF (config, register_dependency),
LUA_INTERFACE_DEF (config, set_metric_symbol),
LUA_INTERFACE_DEF (config, set_metric_action),
LUA_INTERFACE_DEF (config, add_composite),
LUA_INTERFACE_DEF (config, register_module_option),
LUA_INTERFACE_DEF (config, register_pre_filter),
LUA_INTERFACE_DEF (config, register_post_filter),
LUA_INTERFACE_DEF (config, get_api_version),
LUA_INTERFACE_DEF (config, get_key),
LUA_INTERFACE_DEF (config, add_condition),
LUA_INTERFACE_DEF (config, register_regexp),
LUA_INTERFACE_DEF (config, replace_regexp),
LUA_INTERFACE_DEF (config, register_worker_script),
LUA_INTERFACE_DEF (config, add_on_load),
LUA_INTERFACE_DEF (config, get_symbols_count),
LUA_INTERFACE_DEF (config, get_symbol_callback),
LUA_INTERFACE_DEF (config, set_symbol_callback),
{"__tostring", rspamd_lua_class_tostring},
{"__newindex", lua_config_newindex},
{NULL, NULL}
};
static const guint64 rspamd_lua_callback_magic = 0x32c118af1e3263c7ULL;
struct rspamd_config *
lua_check_config (lua_State * L, gint pos)
{
void *ud = rspamd_lua_check_udata (L, pos, "rspamd{config}");
luaL_argcheck (L, ud != NULL, pos, "'config' expected");
return ud ? *((struct rspamd_config **)ud) : NULL;
}
/*** Config functions ***/
static gint
lua_config_get_api_version (lua_State *L)
{
lua_pushinteger (L, RSPAMD_LUA_API_VERSION);
return 1;
}
static gint
lua_config_get_module_opt (lua_State * L)
{
struct rspamd_config *cfg = lua_check_config (L, 1);
const gchar *mname, *optname;
const ucl_object_t *obj;
if (cfg) {
mname = luaL_checkstring (L, 2);
optname = luaL_checkstring (L, 3);
if (mname && optname) {
obj = rspamd_config_get_module_opt (cfg, mname, optname);
if (obj) {
return ucl_object_push_lua (L, obj, TRUE);
}
}
}
lua_pushnil (L);
return 1;
}
static int
lua_config_get_mempool (lua_State * L)
{
rspamd_mempool_t **ppool;
struct rspamd_config *cfg = lua_check_config (L, 1);
if (cfg != NULL) {
ppool = lua_newuserdata (L, sizeof (rspamd_mempool_t *));
rspamd_lua_setclass (L, "rspamd{mempool}", -1);
*ppool = cfg->cfg_pool;
}
return 1;
}
static gint
lua_config_get_all_opt (lua_State * L)
{
struct rspamd_config *cfg = lua_check_config (L, 1);
const gchar *mname;
const ucl_object_t *obj, *cur, *cur_elt;
ucl_object_iter_t it = NULL;
gint i;
if (cfg) {
mname = luaL_checkstring (L, 2);
if (mname) {
obj = ucl_obj_get_key (cfg->rcl_obj, mname);
/* Flatten object */
if (obj != NULL && (ucl_object_type (obj) == UCL_OBJECT ||
ucl_object_type (obj) == UCL_ARRAY)) {
lua_newtable (L);
it = ucl_object_iterate_new (obj);
LL_FOREACH (obj, cur) {
it = ucl_object_iterate_reset (it, cur);
while ((cur_elt = ucl_object_iterate_safe (it, true))) {
lua_pushstring (L, ucl_object_key (cur_elt));
ucl_object_push_lua (L, cur_elt, true);
lua_settable (L, -3);
}
}
ucl_object_iterate_free (it);
return 1;
}
else if (obj != NULL) {
lua_newtable (L);
i = 1;
LL_FOREACH (obj, cur) {
lua_pushnumber (L, i++);
ucl_object_push_lua (L, cur, true);
lua_settable (L, -3);
}
return 1;
}
}
}
lua_pushnil (L);
return 1;
}
static gint
lua_config_get_classifier (lua_State * L)
{
struct rspamd_config *cfg = lua_check_config (L, 1);
struct rspamd_classifier_config *clc = NULL, **pclc = NULL;
const gchar *name;
GList *cur;
if (cfg) {
name = luaL_checkstring (L, 2);
cur = g_list_first (cfg->classifiers);
while (cur) {
clc = cur->data;
if (g_ascii_strcasecmp (clc->name, name) == 0) {
pclc = &clc;
break;
}
cur = g_list_next (cur);
}
if (pclc) {
pclc = lua_newuserdata (L,
sizeof (struct rspamd_classifier_config *));
rspamd_lua_setclass (L, "rspamd{classifier}", -1);
*pclc = clc;
return 1;
}
}
lua_pushnil (L);
return 1;
}
struct lua_callback_data {
guint64 magic;
lua_State *L;
gchar *symbol;
union {
gchar *name;
gint ref;
} callback;
gboolean cb_is_ref;
gint order;
};
/*
* Unref symbol if it is local reference
*/
static void
lua_destroy_cfg_symbol (gpointer ud)
{
struct lua_callback_data *cd = ud;
/* Unref callback */
if (cd->cb_is_ref) {
luaL_unref (cd->L, LUA_REGISTRYINDEX, cd->callback.ref);
}
}
static gint
lua_config_register_module_option (lua_State *L)
{
return 0;
}
static gint
rspamd_compare_order_func (gconstpointer a, gconstpointer b)
{
const struct lua_callback_data *cb1 = a, *cb2 = b;
/* order of call goes from lower to higher */
return cb2->order - cb1->order;
}
void
rspamd_lua_call_post_filters (struct rspamd_task *task)
{
struct lua_callback_data *cd;
struct rspamd_task **ptask;
GList *cur;
lua_State *L = task->cfg->lua_state;
gint err_idx;
GString *tb;
if (task->checkpoint == NULL) {
task->checkpoint = GUINT_TO_POINTER (0x1);
}
else {
/* Do not process if done */
return;
}
cur = task->cfg->post_filters;
while (cur) {
lua_pushcfunction (L, &rspamd_lua_traceback);
err_idx = lua_gettop (L);
cd = cur->data;
if (cd->cb_is_ref) {
lua_rawgeti (cd->L, LUA_REGISTRYINDEX, cd->callback.ref);
}
else {
lua_getglobal (cd->L, cd->callback.name);
}
ptask = lua_newuserdata (cd->L, sizeof (struct rspamd_task *));
rspamd_lua_setclass (cd->L, "rspamd{task}", -1);
*ptask = task;
if (lua_pcall (cd->L, 1, 0, err_idx) != 0) {
tb = lua_touserdata (L, -1);
msg_err_task ("call to post-filter failed: %v", tb);
g_string_free (tb, TRUE);
lua_pop (L, 1);
}
lua_pop (L, 1); /* Error function */
cur = g_list_next (cur);
}
}
static gint
lua_config_register_post_filter (lua_State *L)
{
struct rspamd_config *cfg = lua_check_config (L, 1);
struct lua_callback_data *cd;
gint order = 0;
if (cfg) {
cd =
rspamd_mempool_alloc (cfg->cfg_pool,
sizeof (struct lua_callback_data));
cd->magic = rspamd_lua_callback_magic;
if (lua_type (L, 3) == LUA_TNUMBER) {
order = lua_tonumber (L, 3);
}
if (lua_type (L, 2) == LUA_TSTRING) {
cd->callback.name = rspamd_mempool_strdup (cfg->cfg_pool,
luaL_checkstring (L, 2));
cd->cb_is_ref = FALSE;
}
else {
lua_pushvalue (L, 2);
/* Get a reference */
cd->callback.ref = luaL_ref (L, LUA_REGISTRYINDEX);
cd->cb_is_ref = TRUE;
}
cd->L = L;
cd->order = order;
cfg->post_filters = g_list_insert_sorted (cfg->post_filters, cd,
rspamd_compare_order_func);
rspamd_mempool_add_destructor (cfg->cfg_pool,
(rspamd_mempool_destruct_t)lua_destroy_cfg_symbol,
cd);
}
return 0;
}
void
rspamd_lua_call_pre_filters (struct rspamd_task *task)
{
struct lua_callback_data *cd;
struct rspamd_task **ptask;
GList *cur;
lua_State *L = task->cfg->lua_state;
gint err_idx;
GString *tb;
if (task->checkpoint == NULL) {
task->checkpoint = GUINT_TO_POINTER (0x1);
}
else {
/* Do not process if done */
return;
}
cur = task->cfg->pre_filters;
while (cur) {
lua_pushcfunction (L, &rspamd_lua_traceback);
err_idx = lua_gettop (L);
cd = cur->data;
if (cd->cb_is_ref) {
lua_rawgeti (cd->L, LUA_REGISTRYINDEX, cd->callback.ref);
}
else {
lua_getglobal (cd->L, cd->callback.name);
}
ptask = lua_newuserdata (cd->L, sizeof (struct rspamd_task *));
rspamd_lua_setclass (cd->L, "rspamd{task}", -1);
*ptask = task;
if (lua_pcall (cd->L, 1, 0, err_idx) != 0) {
tb = lua_touserdata (L, -1);
msg_err_task ("call to pre-filter failed: %v", tb);
g_string_free (tb, TRUE);
lua_pop (L, 1);
}
lua_pop (L, 1); /* Error function */
if (task->pre_result.action != METRIC_ACTION_MAX) {
/* Stop processing on reaching some pre-result */
break;
}
cur = g_list_next (cur);
}
}
static gint
lua_config_register_pre_filter (lua_State *L)
{
struct rspamd_config *cfg = lua_check_config (L, 1);
struct lua_callback_data *cd;
gint order = 0;
if (cfg) {
cd =
rspamd_mempool_alloc (cfg->cfg_pool,
sizeof (struct lua_callback_data));
cd->magic = rspamd_lua_callback_magic;
if (lua_type (L, 3) == LUA_TNUMBER) {
order = lua_tonumber (L, 3);
}
if (lua_type (L, 2) == LUA_TSTRING) {
cd->callback.name = rspamd_mempool_strdup (cfg->cfg_pool,
luaL_checkstring (L, 2));
cd->cb_is_ref = FALSE;
}
else {
lua_pushvalue (L, 2);
/* Get a reference */
cd->callback.ref = luaL_ref (L, LUA_REGISTRYINDEX);
cd->cb_is_ref = TRUE;
}
cd->L = L;
cd->order = order;
cfg->pre_filters = g_list_insert_sorted (cfg->pre_filters, cd,
rspamd_compare_order_func);
rspamd_mempool_add_destructor (cfg->cfg_pool,
(rspamd_mempool_destruct_t)lua_destroy_cfg_symbol,
cd);
}
return 0;
}
static gint
lua_config_get_key (lua_State *L)
{
struct rspamd_config *cfg = lua_check_config (L, 1);
const gchar *name;
size_t namelen;
const ucl_object_t *val;
name = luaL_checklstring(L, 2, &namelen);
if (name && cfg) {
val = ucl_object_lookup_len(cfg->rcl_obj, name, namelen);
if (val != NULL) {
ucl_object_push_lua (L, val, val->type != UCL_ARRAY);
}
else {
lua_pushnil (L);
}
}
else {
return luaL_error (L, "invalid arguments");
}
return 1;
}
static void
lua_metric_symbol_callback (struct rspamd_task *task, gpointer ud)
{
struct lua_callback_data *cd = ud;
struct rspamd_task **ptask;
gint level = lua_gettop (cd->L), nresults, err_idx;
lua_State *L = cd->L;
GString *tb;
lua_pushcfunction (L, &rspamd_lua_traceback);
err_idx = lua_gettop (L);
level ++;
if (cd->cb_is_ref) {
lua_rawgeti (L, LUA_REGISTRYINDEX, cd->callback.ref);
}
else {
lua_getglobal (L, cd->callback.name);
}
ptask = lua_newuserdata (L, sizeof (struct rspamd_task *));
rspamd_lua_setclass (L, "rspamd{task}", -1);
*ptask = task;
if (lua_pcall (L, 1, LUA_MULTRET, err_idx) != 0) {
tb = lua_touserdata (L, -1);
msg_err_task ("call to (%s) failed: %v", cd->symbol, tb);
g_string_free (tb, TRUE);
lua_pop (L, 1);
}
else {
nresults = lua_gettop (L) - level;
if (nresults >= 1) {
/* Function returned boolean, so maybe we need to insert result? */
gint res = 0;
GList *opts = NULL;
gint i;
gdouble flag = 1.0;
if (lua_type (cd->L, level + 1) == LUA_TBOOLEAN) {
res = lua_toboolean (L, level + 1);
}
else {
res = lua_tonumber (L, level + 1);
}
if (res) {
gint first_opt = 2;
if (lua_type (L, level + 2) == LUA_TNUMBER) {
flag = lua_tonumber (L, level + 2);
/* Shift opt index */
first_opt = 3;
}
else {
flag = res;
}
for (i = lua_gettop (L); i >= level + first_opt; i--) {
if (lua_type (L, i) == LUA_TSTRING) {
const char *opt = lua_tostring (L, i);
opts = g_list_prepend (opts,
rspamd_mempool_strdup (task->task_pool,
opt));
}
}
rspamd_task_insert_result (task, cd->symbol, flag, opts);
}
lua_pop (L, nresults);
}
}
lua_pop (L, 1); /* Error function */
}
static gint
rspamd_register_symbol_fromlua (lua_State *L,
struct rspamd_config *cfg,
const gchar *name,
gint ref,
gdouble weight,
gint priority,
enum rspamd_symbol_type type,
gint parent,
gboolean optional)
{
struct lua_callback_data *cd;
gint ret = -1;
cd = rspamd_mempool_alloc0 (cfg->cfg_pool,
sizeof (struct lua_callback_data));
cd->magic = rspamd_lua_callback_magic;
cd->cb_is_ref = TRUE;
cd->callback.ref = ref;
cd->L = L;
cd->symbol = rspamd_mempool_strdup (cfg->cfg_pool, name);
if (priority == 0 && weight < 0) {
priority = 1;
}
if ((ret = rspamd_symbols_cache_find_symbol (cfg->cache, name)) != -1) {
if (optional) {
msg_debug_config ("duplicate symbol: %s, skip registering", name);
return ret;
}
else {
msg_err_config ("duplicate symbol: %s, skip registering", name);
return -1;
}
}
ret = rspamd_symbols_cache_add_symbol (cfg->cache,
name,
priority,
lua_metric_symbol_callback,
cd,
type,
parent);
rspamd_mempool_add_destructor (cfg->cfg_pool,
(rspamd_mempool_destruct_t)lua_destroy_cfg_symbol,
cd);
return ret;
}
static gint
lua_parse_symbol_type (const gchar *str)
{
gint ret = SYMBOL_TYPE_NORMAL;
if (str) {
if (strcmp (str, "virtual") == 0) {
ret = SYMBOL_TYPE_VIRTUAL;
}
else if (strcmp (str, "callback") == 0) {
ret = SYMBOL_TYPE_CALLBACK;
}
else if (strcmp (str, "normal") == 0) {
ret = SYMBOL_TYPE_NORMAL;
}
else {
msg_warn ("bad type: %s", str);
}
}
return ret;
}
static gint
lua_parse_symbol_flags (const gchar *str)
{
int ret = 0;
if (str) {
if (strstr (str, "fine") != NULL) {
ret |= SYMBOL_TYPE_FINE;
}
if (strstr (str, "nice") != NULL) {
ret |= SYMBOL_TYPE_FINE;
}
if (strstr (str, "empty") != NULL) {
ret |= SYMBOL_TYPE_EMPTY;
}
if (strstr (str, "skip") != NULL) {
ret |= SYMBOL_TYPE_SKIPPED;
}
}
return ret;
}
static gint
lua_config_register_symbol (lua_State * L)
{
struct rspamd_config *cfg = lua_check_config (L, 1);
const gchar *name = NULL, *flags_str = NULL, *type_str = NULL;
double weight = 0;
gint ret = -1, cbref = -1, type;
gint64 parent = 0, priority = 0;
GError *err = NULL;
if (cfg) {
if (!rspamd_lua_parse_table_arguments (L, 2, &err,
"name=S;weigth=N;callback=F;flags=S;type=S;priority=I;parent=I",
&name, &weight, &cbref, &flags_str, &type_str,
&priority, &parent)) {
msg_err_config ("bad arguments: %e", err);
g_error_free (err);
return luaL_error (L, "invalid arguments");
}
type = lua_parse_symbol_type (type_str);
if (!name && !(type & SYMBOL_TYPE_CALLBACK)) {
return luaL_error (L, "no symbol name but type is not callback");
}
else if (!(type & SYMBOL_TYPE_VIRTUAL) && cbref == -1) {
return luaL_error (L, "no callback for symbol %s", name);
}
type |= lua_parse_symbol_flags (flags_str);
ret = rspamd_register_symbol_fromlua (L,
cfg,
name,
cbref,
weight == 0 ? 1.0 : weight,
priority,
type,
parent == 0 ? -1 : parent,
FALSE);
}
else {
return luaL_error (L, "invalid arguments");
}
lua_pushnumber (L, ret);
return 1;
}
static gint
lua_config_register_symbols (lua_State *L)
{
struct rspamd_config *cfg = lua_check_config (L, 1);
gint i, top, idx, ret = -1;
const gchar *sym;
gdouble weight = 1.0;
if (lua_gettop (L) < 3) {
if (cfg) {
msg_err_config ("not enough arguments to register a function");
}
lua_error (L);
return 0;
}
if (cfg) {
if (lua_type (L, 2) == LUA_TSTRING) {
lua_getglobal (L, luaL_checkstring (L, 2));
}
else {
lua_pushvalue (L, 2);
}
idx = luaL_ref (L, LUA_REGISTRYINDEX);
if (lua_type (L, 3) == LUA_TNUMBER) {
weight = lua_tonumber (L, 3);
top = 4;
}
else {
top = 3;
}
sym = luaL_checkstring (L, top ++);
ret = rspamd_register_symbol_fromlua (L,
cfg,
sym,
idx,
weight,
0,
SYMBOL_TYPE_CALLBACK,
-1,
FALSE);
for (i = top; i <= lua_gettop (L); i++) {
if (lua_type (L, i) == LUA_TTABLE) {
lua_pushvalue (L, i);
lua_pushnil (L);
while (lua_next (L, -2)) {
lua_pushvalue (L, -2);
sym = luaL_checkstring (L, -2);
rspamd_symbols_cache_add_symbol (cfg->cache, sym,
0, NULL, NULL,
SYMBOL_TYPE_VIRTUAL, ret);
lua_pop (L, 2);
}
lua_pop (L, 1);
}
else if (lua_type (L, i) == LUA_TSTRING) {
sym = luaL_checkstring (L, i);
rspamd_symbols_cache_add_symbol (cfg->cache, sym,
0, NULL, NULL,
SYMBOL_TYPE_VIRTUAL, ret);
}
}
}
lua_pushnumber (L, ret);
return 1;
}
static gint
lua_config_register_virtual_symbol (lua_State * L)
{
struct rspamd_config *cfg = lua_check_config (L, 1);
const gchar *name;
double weight;
gint ret = -1, parent = -1;
if (cfg) {
name = luaL_checkstring (L, 2);
weight = luaL_checknumber (L, 3);
if (lua_gettop (L) > 3) {
parent = lua_tonumber (L, 4);
}
if (name) {
ret = rspamd_symbols_cache_add_symbol (cfg->cache, name,
weight > 0 ? 0 : -1, NULL, NULL,
SYMBOL_TYPE_VIRTUAL, parent);
}
}
lua_pushnumber (L, ret);
return 1;
}
static gint
lua_config_register_callback_symbol (lua_State * L)
{
struct rspamd_config *cfg = lua_check_config (L, 1);
const gchar *name = NULL;
double weight;
gint ret = -1, top = 2;
if (cfg) {
if (lua_type (L, 2) == LUA_TSTRING) {
/* Legacy syntax */
name = luaL_checkstring (L, 2);
top ++;
}
weight = luaL_checknumber (L, top);
if (lua_type (L, top + 1) == LUA_TSTRING) {
lua_getglobal (L, luaL_checkstring (L, top + 1));
}
else {
lua_pushvalue (L, top + 1);
}
ret = rspamd_register_symbol_fromlua (L,
cfg,
name,
luaL_ref (L, LUA_REGISTRYINDEX),
weight,
0,
SYMBOL_TYPE_CALLBACK,
-1,
FALSE);
}
lua_pushnumber (L, ret);
return 1;
}
static gint
lua_config_register_callback_symbol_priority (lua_State * L)
{
struct rspamd_config *cfg = lua_check_config (L, 1);
const gchar *name = NULL;
double weight;
gint priority, ret = -1, top = 2;
if (cfg) {
if (lua_type (L, 2) == LUA_TSTRING) {
/* Legacy syntax */
name = luaL_checkstring (L, 2);
top ++;
}
weight = luaL_checknumber (L, top);
priority = luaL_checknumber (L, top + 1);
if (lua_type (L, top + 2) == LUA_TSTRING) {
lua_getglobal (L, luaL_checkstring (L, top + 2));
}
else {
lua_pushvalue (L, top + 2);
}
ret = rspamd_register_symbol_fromlua (L,
cfg,
name,
luaL_ref (L, LUA_REGISTRYINDEX),
weight,
priority,
SYMBOL_TYPE_CALLBACK,
-1,
FALSE);
}
lua_pushnumber (L, ret);
return 1;
}
static gint
lua_config_register_dependency (lua_State * L)
{
struct rspamd_config *cfg = lua_check_config (L, 1);
const gchar *name = NULL, *from = NULL;
gint id;
if (cfg == NULL) {
lua_error (L);
return 0;
}
if (lua_type (L, 2) == LUA_TNUMBER) {
id = luaL_checknumber (L, 2);
name = luaL_checkstring (L, 3);
if (id > 0 && name != NULL) {
rspamd_symbols_cache_add_dependency (cfg->cache, id, name);
}
}
else {
from = luaL_checkstring (L,2);
name = luaL_checkstring (L, 3);
if (from != NULL && name != NULL) {
rspamd_symbols_cache_add_delayed_dependency (cfg->cache, from, name);
}
}
return 0;
}
static gint
lua_config_set_metric_symbol (lua_State * L)
{
struct rspamd_config *cfg = lua_check_config (L, 1);
const gchar *metric_name = DEFAULT_METRIC, *description = NULL,
*group = NULL, *name = NULL, *flags_str = NULL;
double weight;
struct metric *metric;
gboolean one_shot = FALSE;
GError *err = NULL;
gdouble priority = 0.0;
guint flags = 0;
if (cfg) {
if (lua_type (L, 2) == LUA_TTABLE) {
if (!rspamd_lua_parse_table_arguments (L, 2, &err,
"*name=S;score=N;description=S;"
"group=S;one_shot=B;metric=S;priority=N;flags=S",
&name, &weight, &description,
&group, &one_shot, &metric_name, &priority, &flags_str)) {
msg_err_config ("bad arguments: %e", err);
g_error_free (err);
return 0;
}
}
else {
name = luaL_checkstring (L, 2);
weight = luaL_checknumber (L, 3);
if (lua_gettop (L) > 3 && lua_type (L, 4) == LUA_TSTRING) {
description = luaL_checkstring (L, 4);
}
if (lua_gettop (L) > 4 && lua_type (L, 5) == LUA_TSTRING) {
metric_name = luaL_checkstring (L, 5);
}
if (lua_gettop (L) > 5 && lua_type (L, 6) == LUA_TSTRING) {
group = luaL_checkstring (L, 6);
}
if (lua_gettop (L) > 6 && lua_type (L, 7) == LUA_TBOOLEAN) {
one_shot = lua_toboolean (L, 7);
}
}
if (metric_name == NULL) {
metric_name = DEFAULT_METRIC;
}
metric = g_hash_table_lookup (cfg->metrics, metric_name);
if (one_shot) {
flags |= RSPAMD_SYMBOL_FLAG_ONESHOT;
}
if (flags_str) {
if (strstr (flags_str, "one_shot") != NULL) {
flags |= RSPAMD_SYMBOL_FLAG_ONESHOT;
}
else if (strstr (flags_str, "ignore") != NULL) {
flags |= RSPAMD_SYMBOL_FLAG_IGNORE;
}
}
if (metric == NULL) {
msg_err_config ("metric named %s is not defined", metric_name);
}
else if (name != NULL && weight != 0) {
rspamd_config_add_metric_symbol (cfg, metric_name, name,
weight, description, group, flags, (guint)priority);
}
}
else {
return luaL_error (L, "invalid arguments, rspamd_config expected");
}
return 0;
}
static gint
lua_config_set_metric_action (lua_State * L)
{
struct rspamd_config *cfg = lua_check_config (L, 1);
const gchar *metric_name = DEFAULT_METRIC, *name = NULL, *flags_str = NULL;
double weight;
struct metric *metric;
GError *err = NULL;
gdouble priority = 0.0;
if (cfg) {
if (lua_type (L, 2) == LUA_TTABLE) {
if (!rspamd_lua_parse_table_arguments (L, 2, &err,
"*action=S;score=N;"
"metric=S;priority=N",
&name, &weight,
&metric_name, &priority, &flags_str)) {
msg_err_config ("bad arguments: %e", err);
g_error_free (err);
return 0;
}
}
else {
return luaL_error (L, "invalid arguments, table expected");
}
if (metric_name == NULL) {
metric_name = DEFAULT_METRIC;
}
metric = g_hash_table_lookup (cfg->metrics, metric_name);
if (metric == NULL) {
msg_err_config ("metric named %s is not defined", metric_name);
}
else if (name != NULL && weight != 0) {
rspamd_config_set_action_score (cfg, metric_name, name,
weight, (guint)priority);
}
}
else {
return luaL_error (L, "invalid arguments, rspamd_config expected");
}
return 0;
}
static gint
lua_config_add_composite (lua_State * L)
{
struct rspamd_config *cfg = lua_check_config (L, 1);
struct rspamd_expression *expr;
gchar *name;
const gchar *expr_str;
struct rspamd_composite *composite;
gboolean ret = FALSE, new = TRUE;
GError *err = NULL;
if (cfg) {
name = rspamd_mempool_strdup (cfg->cfg_pool, luaL_checkstring (L, 2));
expr_str = luaL_checkstring (L, 3);
if (name && expr_str) {
if (!rspamd_parse_expression (expr_str, 0, &composite_expr_subr,
NULL, cfg->cfg_pool, &err, &expr)) {
msg_err_config ("cannot parse composite expression %s: %e",
expr_str,
err);
g_error_free (err);
}
else {
if (g_hash_table_lookup (cfg->composite_symbols, name) != NULL) {
msg_warn_config ("composite %s is redefined", name);
new = FALSE;
}
composite = rspamd_mempool_alloc (cfg->cfg_pool,
sizeof (struct rspamd_composite));
composite->expr = expr;
composite->id = g_hash_table_size (cfg->composite_symbols);
g_hash_table_insert (cfg->composite_symbols,
(gpointer)name,
composite);
if (new) {
rspamd_symbols_cache_add_symbol (cfg->cache, name,
0, NULL, NULL, SYMBOL_TYPE_COMPOSITE, -1);
}
ret = TRUE;
}
}
}
lua_pushboolean (L, ret);
return 1;
}
static gint
lua_config_newindex (lua_State *L)
{
struct rspamd_config *cfg = lua_check_config (L, 1);
const gchar *name;
gint id;
gboolean optional = FALSE;
name = luaL_checkstring (L, 2);
if (cfg != NULL && name != NULL && lua_gettop (L) > 2) {
if (lua_type (L, 3) == LUA_TFUNCTION) {
/* Normal symbol from just a function */
lua_pushvalue (L, 3);
rspamd_register_symbol_fromlua (L,
cfg,
name,
luaL_ref (L, LUA_REGISTRYINDEX),
1.0,
0,
SYMBOL_TYPE_NORMAL,
-1,
FALSE);
}
else if (lua_type (L, 3) == LUA_TTABLE) {
gint type = SYMBOL_TYPE_NORMAL, priority = 0, idx;
gdouble weight = 1.0, score;
const char *type_str, *group = NULL, *description = NULL;
guint flags = 0;
/*
* Table can have the following attributes:
* "callback" - should be a callback function
* "weight" - optional weight
* "priority" - optional priority
* "type" - optional type (normal, virtual, callback)
* -- Metric options
* "score" - optional default score (overrided by metric)
* "group" - optional default group
* "one_shot" - optional one shot mode
* "description" - optional description
*/
lua_pushvalue (L, 3);
lua_pushstring (L, "callback");
lua_gettable (L, -2);
if (lua_type (L, -1) != LUA_TFUNCTION) {
lua_pop (L, 2);
msg_info_config ("cannot find callback definition for %s",
name);
return 0;
}
idx = luaL_ref (L, LUA_REGISTRYINDEX);
/* Optional fields */
lua_pushstring (L, "weight");
lua_gettable (L, -2);
if (lua_type (L, -1) == LUA_TNUMBER) {
weight = lua_tonumber (L, -1);
}
lua_pop (L, 1);
lua_pushstring (L, "priority");
lua_gettable (L, -2);
if (lua_type (L, -1) == LUA_TNUMBER) {
priority = lua_tonumber (L, -1);
}
lua_pop (L, 1);
lua_pushstring (L, "optional");
lua_gettable (L, -2);
if (lua_type (L, -1) == LUA_TBOOLEAN) {
optional = lua_toboolean (L, -1);
}
lua_pop (L, 1);
lua_pushstring (L, "type");
lua_gettable (L, -2);
if (lua_type (L, -1) == LUA_TSTRING) {
type_str = lua_tostring (L, -1);
if (strcmp (type_str, "normal") == 0) {
type = SYMBOL_TYPE_NORMAL;
}
else if (strcmp (type_str, "virtual") == 0) {
type = SYMBOL_TYPE_VIRTUAL;
}
else if (strcmp (type_str, "callback") == 0) {
type = SYMBOL_TYPE_CALLBACK;
}
else {
msg_info_config ("unknown type: %s", type_str);
}
}
lua_pop (L, 1);
id = rspamd_register_symbol_fromlua (L,
cfg,
name,
idx,
weight,
priority,
type,
-1,
optional);
if (id != -1) {
/* Check for condition */
lua_pushstring (L, "condition");
lua_gettable (L, -2);
if (lua_type (L, -1) == LUA_TFUNCTION) {
gint condref;
/* Here we pop function from the stack, so no lua_pop is required */
condref = luaL_ref (L, LUA_REGISTRYINDEX);
rspamd_symbols_cache_add_condition (cfg->cache, id, L, condref);
}
else {
lua_pop (L, 1);
}
}
/*
* Now check if a symbol has not been registered in any metric and
* insert default value if applicable
*/
if (g_hash_table_lookup (cfg->metrics_symbols, name) == NULL) {
lua_pushstring (L, "score");
lua_gettable (L, -2);
if (lua_type (L, -1) == LUA_TNUMBER) {
score = lua_tonumber (L, -1);
lua_pop (L, 1);
/* If score defined, then we can check other metric fields */
lua_pushstring (L, "group");
lua_gettable (L, -2);
if (lua_type (L, -1) == LUA_TSTRING) {
group = lua_tostring (L, -1);
}
lua_pop (L, 1);
lua_pushstring (L, "description");
lua_gettable (L, -2);
if (lua_type (L, -1) == LUA_TSTRING) {
description = lua_tostring (L, -1);
}
lua_pop (L, 1);
lua_pushstring (L, "one_shot");
lua_gettable (L, -2);
if (lua_type (L, -1) == LUA_TBOOLEAN) {
if (lua_toboolean (L, -1)) {
flags |= RSPAMD_SYMBOL_FLAG_ONESHOT;
}
}
lua_pop (L, 1);
/*
* Do not override the existing symbols (using zero priority),
* since we are defining default values here
*/
rspamd_config_add_metric_symbol (cfg, NULL, name, score,
description, group, flags, 0);
}
else {
lua_pop (L, 1);
}
}
/* Remove table from stack */
lua_pop (L, 1);
}
}
else {
return luaL_error (L, "invalid arguments");
}
return 0;
}
static gint
lua_config_add_condition (lua_State *L)
{
struct rspamd_config *cfg = lua_check_config (L, 1);
const gchar *sym = luaL_checkstring (L, 2);
gboolean ret = FALSE;
gint condref;
if (cfg && sym && lua_type (L, 3) == LUA_TFUNCTION) {
lua_pushvalue (L, 3);
condref = luaL_ref (L, LUA_REGISTRYINDEX);
ret = rspamd_symbols_cache_add_condition_delayed (cfg->cache, sym, L,
condref);
if (!ret) {
luaL_unref (L, LUA_REGISTRYINDEX, condref);
}
}
lua_pushboolean (L, ret);
return 1;
}
static gint
lua_config_register_regexp (lua_State *L)
{
struct rspamd_config *cfg = lua_check_config (L, 1);
struct rspamd_lua_regexp *re = NULL;
rspamd_regexp_t *cache_re;
const gchar *type_str = NULL, *header_str = NULL;
gsize header_len = 0;
GError *err = NULL;
enum rspamd_re_type type = RSPAMD_RE_BODY;
gboolean pcre_only = FALSE;
guint old_flags;
/*
* - `re`* : regular expression object
* - `type`*: type of regular expression:
* + `mime`: mime regexp
* + `rawmime`: raw mime regexp
* + `header`: header regexp
* + `rawheader`: raw header expression
* + `body`: raw body regexp
* + `url`: url regexp
* - `header`: for header and rawheader regexp means the name of header
* - `pcre_only`: allow merely pcre for this regexp
*/
if (cfg != NULL) {
if (!rspamd_lua_parse_table_arguments (L, 2, &err,
"*re=U{regexp};*type=S;header=S;pcre_only=B",
&re, &type_str, &header_str, &pcre_only)) {
msg_err_config ("cannot get parameters list: %e", err);
if (err) {
g_error_free (err);
}
}
else {
type = rspamd_re_cache_type_from_string (type_str);
if ((type == RSPAMD_RE_HEADER ||
type == RSPAMD_RE_RAWHEADER ||
type == RSPAMD_RE_MIMEHEADER) &&
header_str == NULL) {
msg_err_config (
"header argument is mandatory for header/rawheader regexps");
}
else {
if (pcre_only) {
old_flags = rspamd_regexp_get_flags (re->re);
old_flags |= RSPAMD_REGEXP_FLAG_PCRE_ONLY;
rspamd_regexp_set_flags (re->re, old_flags);
}
if (header_str != NULL) {
/* Include the last \0 */
header_len = strlen (header_str) + 1;
}
cache_re = rspamd_re_cache_add (cfg->re_cache, re->re, type,
(gpointer) header_str, header_len);
/*
* XXX: here are dragons!
* Actually, lua regexp contains internal rspamd_regexp_t
* and it owns it.
* However, after this operation we have some OTHER regexp,
* which we really would like to use.
* So we do the following:
* 1) Remove old re and unref it
* 2) Replace the internal re with cached one
* 3) Increase its refcount to share ownership between cache and
* lua object
*/
if (cache_re != re->re) {
rspamd_regexp_unref (re->re);
re->re = rspamd_regexp_ref (cache_re);
}
}
}
}
return 0;
}
static gint
lua_config_replace_regexp (lua_State *L)
{
struct rspamd_config *cfg = lua_check_config (L, 1);
struct rspamd_lua_regexp *old_re = NULL, *new_re = NULL;
GError *err = NULL;
if (cfg != NULL) {
if (!rspamd_lua_parse_table_arguments (L, 2, &err,
"*old_re=U{regexp};*new_re=U{regexp}",
&old_re, &new_re)) {
msg_err_config ("cannot get parameters list: %e", err);
if (err) {
g_error_free (err);
}
}
else {
rspamd_re_cache_replace (cfg->re_cache, old_re->re, new_re->re);
}
}
return 0;
}
static gint
lua_config_register_worker_script (lua_State *L)
{
struct rspamd_config *cfg = lua_check_config (L, 1);
const gchar *worker_type = luaL_checkstring (L, 2), *wtype;
struct rspamd_worker_conf *cf;
GList *cur;
struct rspamd_worker_lua_script *sc;
gboolean found = FALSE;
if (cfg == NULL || worker_type == NULL || lua_type (L, 3) != LUA_TFUNCTION) {
return luaL_error (L, "invalid arguments");
}
for (cur = g_list_first (cfg->workers); cur != NULL; cur = g_list_next (cur)) {
cf = cur->data;
wtype = g_quark_to_string (cf->type);
if (g_ascii_strcasecmp (wtype, worker_type) == 0) {
sc = rspamd_mempool_alloc0 (cfg->cfg_pool, sizeof (*sc));
lua_pushvalue (L, 3);
sc->cbref = luaL_ref (L, LUA_REGISTRYINDEX);
DL_APPEND (cf->scripts, sc);
found = TRUE;
}
}
lua_pushboolean (L, found);
return 1;
}
static gint
lua_config_add_on_load (lua_State *L)
{
struct rspamd_config *cfg = lua_check_config (L, 1);
struct rspamd_config_post_load_script *sc;
if (cfg == NULL || lua_type (L, 2) != LUA_TFUNCTION) {
return luaL_error (L, "invalid arguments");
}
sc = rspamd_mempool_alloc0 (cfg->cfg_pool, sizeof (*sc));
lua_pushvalue (L, 2);
sc->cbref = luaL_ref (L, LUA_REGISTRYINDEX);
DL_APPEND (cfg->on_load, sc);
return 0;
}
static gint
lua_config_get_symbols_count (lua_State *L)
{
struct rspamd_config *cfg = lua_check_config (L, 1);
guint res = 0;
if (cfg != NULL) {
res = rspamd_symbols_cache_symbols_count (cfg->cache);
}
else {
return luaL_error (L, "invalid arguments");
}
lua_pushnumber (L, res);
return 1;
}
static gint
lua_config_get_symbol_callback (lua_State *L)
{
struct rspamd_config *cfg = lua_check_config (L, 1);
const gchar *sym = luaL_checkstring (L, 2);
struct rspamd_abstract_callback_data *abs_cbdata;
struct lua_callback_data *cbd;
if (cfg != NULL && sym != NULL) {
abs_cbdata = rspamd_symbols_cache_get_cbdata (cfg->cache, sym);
if (abs_cbdata == NULL || abs_cbdata->magic != rspamd_lua_callback_magic) {
lua_pushnil (L);
}
else {
cbd = (struct lua_callback_data *)abs_cbdata;
if (cbd->cb_is_ref) {
lua_rawgeti (L, LUA_REGISTRYINDEX, cbd->callback.ref);
}
else {
lua_getglobal (L, cbd->callback.name);
}
}
}
else {
return luaL_error (L, "invalid arguments");
}
return 1;
}
static gint
lua_config_set_symbol_callback (lua_State *L)
{
struct rspamd_config *cfg = lua_check_config (L, 1);
const gchar *sym = luaL_checkstring (L, 2);
struct rspamd_abstract_callback_data *abs_cbdata;
struct lua_callback_data *cbd;
if (cfg != NULL && sym != NULL && lua_type (L, 3) == LUA_TFUNCTION) {
abs_cbdata = rspamd_symbols_cache_get_cbdata (cfg->cache, sym);
if (abs_cbdata == NULL || abs_cbdata->magic != rspamd_lua_callback_magic) {
lua_pushboolean (L, FALSE);
}
else {
cbd = (struct lua_callback_data *)abs_cbdata;
if (cbd->cb_is_ref) {
luaL_unref (L, LUA_REGISTRYINDEX, cbd->callback.ref);
}
else {
cbd->cb_is_ref = TRUE;
}
lua_pushvalue (L, 3);
cbd->callback.ref = luaL_ref (L, LUA_REGISTRYINDEX);
lua_pushboolean (L, TRUE);
}
}
else {
return luaL_error (L, "invalid arguments");
}
return 1;
}
void
luaopen_config (lua_State * L)
{
rspamd_lua_new_class (L, "rspamd{config}", configlib_m);
lua_pop (L, 1);
}