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/*
* Copyright 2023 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 "src/libserver/composites/composites.h"
/*
* 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 char *name, struct rspamd_config *cfg)
{
char *symbol;
const char *desc = NULL;
double *score;
struct rspamd_symbol *s;
/* 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(cfg->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_alloc0(cfg->cfg_pool, sizeof(*s));
s->name = symbol;
s->weight_ptr = score;
g_hash_table_insert(cfg->symbols, symbol, s);
}
if (desc) {
s->description = rspamd_mempool_strdup(cfg->cfg_pool, desc);
}
}
}
}
/* Do post load initialization based on lua */
void rspamd_lua_post_load_config(struct rspamd_config *cfg)
{
lua_State *L = cfg->lua_state;
const char *name;
ucl_object_t *obj;
gsize keylen, i;
/* First check all module options that may be overridden in 'config' global */
lua_getglobal(L, "config");
if (lua_istable(L, -1)) {
/* Iterate to get all keys */
GPtrArray *names = g_ptr_array_new_full(rspamd_lua_table_size(L, -1),
g_free);
for (lua_pushnil(L); lua_next(L, -2); lua_pop(L, 2)) {
char *tmp;
lua_pushvalue(L, -2);
name = luaL_checklstring(L, -1, &keylen);
if (name && lua_istable(L, -2)) {
tmp = g_malloc(keylen + 1);
rspamd_strlcpy(tmp, name, keylen + 1);
g_ptr_array_add(names, tmp);
}
}
PTR_ARRAY_FOREACH(names, i, name)
{
lua_getfield(L, -1, name);
if (lua_istable(L, -1)) {
obj = ucl_object_lua_import(L, lua_gettop(L));
if (obj != NULL) {
ucl_object_sort_keys(obj, UCL_SORT_KEYS_DEFAULT);
ucl_object_insert_key_merged(cfg->cfg_ucl_obj,
obj,
name,
strlen(name),
true);
}
}
}
g_ptr_array_free(names, 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);
}
}
}
lua_settop(L, 0);
rspamd_lua_start_gc(cfg);
}
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