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/*-
* 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 "expression.h"
#include "composites.h"
#ifdef HAVE_SYS_UTSNAME_H
#endif
/*
* This is implementation of lua routines to handle config file params
*/
/* Process a single item in 'metrics' table */
static void
lua_process_metric (lua_State *L, const gchar *name, struct rspamd_config *cfg)
{
GList *metric_list;
gchar *symbol;
const gchar *desc = NULL;
struct rspamd_metric *metric;
gdouble *score;
struct rspamd_symbol *s;
/* Get module opt structure */
if ((metric = g_hash_table_lookup (cfg->metrics, name)) == NULL) {
metric = rspamd_config_new_metric (cfg, metric, name);
}
/* Now iterate through module table */
for (lua_pushnil (L); lua_next (L, -2); lua_pop (L, 1)) {
/* key - -2, value - -1 */
symbol =
rspamd_mempool_strdup (cfg->cfg_pool, luaL_checkstring (L, -2));
if (symbol != NULL) {
if (lua_istable (L, -1)) {
/* We got a table, so extract individual attributes */
lua_pushstring (L, "weight");
lua_gettable (L, -2);
if (lua_isnumber (L, -1)) {
score =
rspamd_mempool_alloc (cfg->cfg_pool, sizeof (double));
*score = lua_tonumber (L, -1);
}
else {
msg_warn_config("cannot get weight of symbol: %s", symbol);
continue;
}
lua_pop (L, 1);
lua_pushstring (L, "description");
lua_gettable (L, -2);
if (lua_isstring (L, -1)) {
desc = lua_tostring (L, -1);
}
lua_pop (L, 1);
}
else if (lua_isnumber (L, -1)) {
/* Just got weight */
score = rspamd_mempool_alloc (cfg->cfg_pool, sizeof (double));
*score = lua_tonumber (L, -1);
}
else {
msg_warn_config("cannot get weight of symbol: %s", symbol);
continue;
}
/* Insert symbol */
if ((s =
g_hash_table_lookup (metric->symbols, symbol)) != NULL) {
msg_info_config("replacing weight for symbol %s: %.2f -> %.2f",
symbol,
*s->weight_ptr,
*score);
s->weight_ptr = score;
}
else {
s = rspamd_mempool_alloc (cfg->cfg_pool, sizeof (*s));
s->name = symbol;
s->weight_ptr = score;
g_hash_table_insert (metric->symbols, symbol, s);
}
if (desc) {
s->description = rspamd_mempool_strdup (cfg->cfg_pool, desc);
}
if ((metric_list =
g_hash_table_lookup (cfg->metrics_symbols, symbol)) == NULL) {
metric_list = g_list_prepend (NULL, metric);
rspamd_mempool_add_destructor (cfg->cfg_pool,
(rspamd_mempool_destruct_t)g_list_free, metric_list);
g_hash_table_insert (cfg->metrics_symbols, symbol, metric_list);
}
else {
/* Slow but keep start element of list in safe */
if (!g_list_find (metric_list, metric)) {
metric_list = g_list_append (metric_list, metric);
}
}
}
}
}
/* Do post load initialization based on lua */
void
rspamd_lua_post_load_config (struct rspamd_config *cfg)
{
lua_State *L = cfg->lua_state;
const gchar *name, *val;
gchar *sym;
struct rspamd_expression *expr, *old_expr;
ucl_object_t *obj;
gsize keylen;
GError *err = NULL;
/* First check all module options that may be overridden in 'config' global */
lua_getglobal (L, "config");
if (lua_istable (L, -1)) {
/* Iterate */
for (lua_pushnil (L); lua_next (L, -2); lua_pop (L, 1)) {
/* 'key' is at index -2 and 'value' is at index -1 */
/* Key must be a string and value must be a table */
name = luaL_checklstring (L, -2, &keylen);
if (name != NULL && lua_istable (L, -1)) {
obj = ucl_object_lua_import (L, lua_gettop (L));
if (obj != NULL) {
ucl_object_insert_key_merged (cfg->rcl_obj,
obj,
name,
keylen,
true);
}
}
}
}
/* Check metrics settings */
lua_getglobal (L, "metrics");
if (lua_istable (L, -1)) {
/* Iterate */
for (lua_pushnil (L); lua_next (L, -2); lua_pop (L, 1)) {
/* 'key' is at index -2 and 'value' is at index -1 */
/* Key must be a string and value must be a table */
name = luaL_checkstring (L, -2);
if (name != NULL && lua_istable (L, -1)) {
lua_process_metric (L, name, cfg);
}
}
}
/* Check composites */
lua_getglobal (L, "composites");
if (lua_istable (L, -1)) {
/* Iterate */
for (lua_pushnil (L); lua_next (L, -2); lua_pop (L, 1)) {
/* 'key' is at index -2 and 'value' is at index -1 */
/* Key must be a string and value must be a table */
name = luaL_checkstring (L, -2);
if (name != NULL && lua_isstring (L, -1)) {
val = lua_tostring (L, -1);
sym = rspamd_mempool_strdup (cfg->cfg_pool, name);
if (!rspamd_parse_expression (val, 0, &composite_expr_subr, NULL,
cfg->cfg_pool, &err, &expr)) {
msg_err_config("cannot parse composite expression '%s': %s", val,
err->message);
g_error_free (err);
err = NULL;
continue;
}
/* Now check hash table for this composite */
if ((old_expr =
g_hash_table_lookup (cfg->composite_symbols,
name)) != NULL) {
msg_info_config("replacing composite symbol %s", name);
g_hash_table_replace (cfg->composite_symbols, sym, expr);
}
else {
g_hash_table_insert (cfg->composite_symbols, sym, expr);
rspamd_symbols_cache_add_symbol (cfg->cache, sym,
0, NULL, NULL, SYMBOL_TYPE_COMPOSITE, -1);
}
}
}
}
lua_settop (L, 0);
}
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