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/*
* Copyright (c) 2009-2012, Vsevolod Stakhov
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY AUTHOR ''AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "lua_common.h"
#include "expressions.h"
/* Lua module init function */
#define MODULE_INIT_FUNC "module_init"
const luaL_reg null_reg[] = {
{"__tostring", rspamd_lua_class_tostring},
{NULL, NULL}
};
/* Logger methods */
LUA_FUNCTION_DEF (logger, err);
LUA_FUNCTION_DEF (logger, warn);
LUA_FUNCTION_DEF (logger, info);
LUA_FUNCTION_DEF (logger, debug);
static const struct luaL_reg loggerlib_f[] = {
LUA_INTERFACE_DEF (logger, err),
LUA_INTERFACE_DEF (logger, warn),
LUA_INTERFACE_DEF (logger, info),
LUA_INTERFACE_DEF (logger, debug),
{"__tostring", rspamd_lua_class_tostring},
{NULL, NULL}
};
/* Util functions */
/**
* Create new class and store metatable on top of the stack
* @param L
* @param classname name of class
* @param func table of class methods
*/
void
rspamd_lua_new_class (lua_State * L,
const gchar *classname,
const struct luaL_reg *methods)
{
luaL_newmetatable (L, classname); /* mt */
lua_pushstring (L, "__index");
lua_pushvalue (L, -2); /* pushes the metatable */
lua_settable (L, -3); /* metatable.__index = metatable */
lua_pushstring (L, "class"); /* mt,"__index",it,"class" */
lua_pushstring (L, classname); /* mt,"__index",it,"class",classname */
lua_rawset (L, -3); /* mt,"__index",it */
luaL_register (L, NULL, methods);
}
/**
* Create and register new class with static methods and store metatable on top of the stack
*/
void
rspamd_lua_new_class_full (lua_State *L,
const gchar *classname,
const gchar *static_name,
const struct luaL_reg *methods,
const struct luaL_reg *func)
{
rspamd_lua_new_class (L, classname, methods);
luaL_register (L, static_name, func);
}
gint
rspamd_lua_class_tostring (lua_State * L)
{
gchar buf[32];
if (!lua_getmetatable (L, 1)) {
goto error;
}
lua_pushstring (L, "__index");
lua_gettable (L, -2);
if (!lua_istable (L, -1)) {
goto error;
}
lua_pushstring (L, "class");
lua_gettable (L, -2);
if (!lua_isstring (L, -1)) {
goto error;
}
snprintf (buf, sizeof (buf), "%p", lua_touserdata (L, 1));
lua_pushfstring (L, "%s: %s", lua_tostring (L, -1), buf);
return 1;
error:
lua_pushstring (L, "invalid object passed to 'lua_common.c:__tostring'");
lua_error (L);
return 1;
}
void
rspamd_lua_setclass (lua_State * L, const gchar *classname, gint objidx)
{
luaL_getmetatable (L, classname);
if (objidx < 0) {
objidx--;
}
lua_setmetatable (L, objidx);
}
/* assume that table is at the top */
void
rspamd_lua_table_set (lua_State * L, const gchar *index, const gchar *value)
{
lua_pushstring (L, index);
if (value) {
lua_pushstring (L, value);
}
else {
lua_pushnil (L);
}
lua_settable (L, -3);
}
const gchar *
rspamd_lua_table_get (lua_State *L, const gchar *index)
{
const gchar *result;
lua_pushstring (L, index);
lua_gettable (L, -2);
if (!lua_isstring (L, -1)) {
return NULL;
}
result = lua_tostring (L, -1);
lua_pop (L, 1);
return result;
}
static void
lua_common_log (GLogLevelFlags level, lua_State *L, const gchar *msg)
{
lua_Debug d;
gchar func_buf[128], *p;
if (lua_getstack (L, 1, &d) == 1) {
(void)lua_getinfo (L, "Sl", &d);
if ((p = strrchr (d.short_src, '/')) == NULL) {
p = d.short_src;
}
else {
p++;
}
rspamd_snprintf (func_buf, sizeof (func_buf), "%s:%d", p,
d.currentline);
if (level == G_LOG_LEVEL_DEBUG) {
rspamd_conditional_debug (rspamd_main->logger,
NULL,
func_buf,
"%s",
msg);
}
else {
rspamd_common_log_function (rspamd_main->logger,
level,
func_buf,
"%s",
msg);
}
}
else {
if (level == G_LOG_LEVEL_DEBUG) {
rspamd_conditional_debug (rspamd_main->logger,
NULL,
__FUNCTION__,
"%s",
msg);
}
else {
rspamd_common_log_function (rspamd_main->logger,
level,
__FUNCTION__,
"%s",
msg);
}
}
}
/*** Logger interface ***/
static gint
lua_logger_err (lua_State * L)
{
const gchar *msg;
msg = luaL_checkstring (L, 1);
lua_common_log (G_LOG_LEVEL_CRITICAL, L, msg);
return 1;
}
static gint
lua_logger_warn (lua_State * L)
{
const gchar *msg;
msg = luaL_checkstring (L, 1);
lua_common_log (G_LOG_LEVEL_WARNING, L, msg);
return 1;
}
static gint
lua_logger_info (lua_State * L)
{
const gchar *msg;
msg = luaL_checkstring (L, 1);
lua_common_log (G_LOG_LEVEL_INFO, L, msg);
return 1;
}
static gint
lua_logger_debug (lua_State * L)
{
const gchar *msg;
msg = luaL_checkstring (L, 1);
lua_common_log (G_LOG_LEVEL_DEBUG, L, msg);
return 1;
}
/*** Init functions ***/
static gint
lua_load_logger (lua_State *L)
{
lua_newtable (L);
luaL_register (L, NULL, loggerlib_f);
return 1;
}
static void
luaopen_logger (lua_State * L)
{
rspamd_lua_add_preload (L, "rspamd_logger", lua_load_logger);
}
static void
lua_add_actions_global (lua_State *L)
{
gint i;
lua_newtable (L);
for (i = METRIC_ACTION_REJECT; i <= METRIC_ACTION_NOACTION; i++) {
lua_pushstring (L, rspamd_action_to_str (i));
lua_pushinteger (L, i);
lua_settable (L, -3);
}
/* Set global table */
lua_setglobal (L, "rspamd_actions");
}
void
rspamd_lua_set_path (lua_State *L, struct rspamd_config *cfg)
{
const gchar *old_path, *additional_path = NULL;
const ucl_object_t *opts;
gchar path_buf[PATH_MAX];
lua_getglobal (L, "package");
lua_getfield (L, -1, "path");
old_path = luaL_checkstring (L, -1);
if (strstr (old_path, RSPAMD_PLUGINSDIR) != NULL) {
/* Path has been already set, do not touch it */
lua_pop (L, 2);
return;
}
opts = ucl_object_find_key (cfg->rcl_obj, "options");
if (opts != NULL) {
opts = ucl_object_find_key (opts, "lua_path");
if (opts != NULL && ucl_object_type (opts) == UCL_STRING) {
additional_path = ucl_object_tostring (opts);
}
}
if (additional_path) {
rspamd_snprintf (path_buf, sizeof (path_buf), "%s;%s/lua/?.lua;%s/lua/?.lua;%s",
old_path, RSPAMD_PLUGINSDIR, RSPAMD_CONFDIR, additional_path);
}
else {
rspamd_snprintf (path_buf, sizeof (path_buf), "%s;%s/lua/?.lua;%s/lua/?.lua",
old_path, RSPAMD_PLUGINSDIR, RSPAMD_CONFDIR);
}
lua_pop (L, 1);
lua_pushstring (L, path_buf);
lua_setfield (L, -2, "path");
lua_pop (L, 1);
}
lua_State *
rspamd_lua_init (struct rspamd_config *cfg)
{
lua_State *L;
L = luaL_newstate ();
luaL_openlibs (L);
luaopen_logger (L);
luaopen_mempool (L);
luaopen_config (L);
luaopen_radix (L);
luaopen_hash_table (L);
luaopen_trie (L);
luaopen_task (L);
luaopen_textpart (L);
luaopen_mimepart (L);
luaopen_image (L);
luaopen_url (L);
luaopen_classifier (L);
luaopen_statfile (L);
luaopen_glib_regexp (L);
luaopen_cdb (L);
luaopen_xmlrpc (L);
luaopen_http (L);
luaopen_redis (L);
luaopen_upstream (L);
lua_add_actions_global (L);
luaopen_session (L);
luaopen_io_dispatcher (L);
luaopen_dns_resolver (L);
luaopen_rsa (L);
luaopen_ip (L);
rspamd_lua_add_preload (L, "ucl", luaopen_ucl);
return L;
}
/**
* Initialize new locked lua_State structure
*/
struct lua_locked_state *
rspamd_init_lua_locked (struct rspamd_config *cfg)
{
struct lua_locked_state *new;
new = g_slice_alloc (sizeof (struct lua_locked_state));
new->L = rspamd_lua_init (cfg);
new->m = rspamd_mutex_new ();
return new;
}
/**
* Free locked state structure
*/
void
rspamd_free_lua_locked (struct lua_locked_state *st)
{
g_assert (st != NULL);
lua_close (st->L);
rspamd_mutex_free (st->m);
g_slice_free1 (sizeof (struct lua_locked_state), st);
}
gboolean
rspamd_init_lua_filters (struct rspamd_config *cfg)
{
struct rspamd_config **pcfg;
GList *cur;
struct script_module *module;
lua_State *L = cfg->lua_state;
rspamd_lua_set_path (L, cfg);
cur = g_list_first (cfg->script_modules);
while (cur) {
module = cur->data;
if (module->path) {
if (luaL_loadfile (L, module->path) != 0) {
msg_info ("load of %s failed: %s", module->path,
lua_tostring (L, -1));
cur = g_list_next (cur);
return FALSE;
}
/* Initialize config structure */
pcfg = lua_newuserdata (L, sizeof (struct rspamd_config *));
rspamd_lua_setclass (L, "rspamd{config}", -1);
*pcfg = cfg;
lua_setglobal (L, "rspamd_config");
/* do the call (0 arguments, N result) */
if (lua_pcall (L, 0, LUA_MULTRET, 0) != 0) {
msg_info ("init of %s failed: %s", module->path,
lua_tostring (L, -1));
return FALSE;
}
if (lua_gettop (L) != 0) {
if (lua_tonumber (L, -1) == -1) {
msg_info (
"%s returned -1 that indicates configuration error",
module->path);
return FALSE;
}
lua_pop (L, lua_gettop (L));
}
}
cur = g_list_next (cur);
}
/* Assign state */
cfg->lua_state = L;
return TRUE;
}
/* Callback functions */
gint
rspamd_lua_call_filter (const gchar *function, struct rspamd_task *task)
{
gint result;
struct rspamd_task **ptask;
lua_State *L = task->cfg->lua_state;
lua_getglobal (L, function);
ptask = lua_newuserdata (L, sizeof (struct rspamd_task *));
rspamd_lua_setclass (L, "rspamd{task}", -1);
*ptask = task;
if (lua_pcall (L, 1, 1, 0) != 0) {
msg_info ("call to %s failed", function);
}
/* retrieve result */
if (!lua_isnumber (L, -1)) {
msg_info ("function %s must return a number", function);
}
result = lua_tonumber (L, -1);
lua_pop (L, 1); /* pop returned value */
return result;
}
gint
rspamd_lua_call_chain_filter (const gchar *function,
struct rspamd_task *task,
gint *marks,
guint number)
{
gint result;
guint i;
lua_State *L = task->cfg->lua_state;
lua_getglobal (L, function);
for (i = 0; i < number; i++) {
lua_pushnumber (L, marks[i]);
}
if (lua_pcall (L, number, 1, 0) != 0) {
msg_info ("call to %s failed", function);
}
/* retrieve result */
if (!lua_isnumber (L, -1)) {
msg_info ("function %s must return a number", function);
}
result = lua_tonumber (L, -1);
lua_pop (L, 1); /* pop returned value */
return result;
}
/*
* LUA custom consolidation function
*/
struct consolidation_callback_data {
struct rspamd_task *task;
double score;
const gchar *func;
};
static void
lua_consolidation_callback (gpointer key, gpointer value, gpointer arg)
{
double res;
struct symbol *s = (struct symbol *)value;
struct consolidation_callback_data *data =
(struct consolidation_callback_data *)arg;
lua_State *L = data->task->cfg->lua_state;
lua_getglobal (L, data->func);
lua_pushstring (L, (const gchar *)key);
lua_pushnumber (L, s->score);
if (lua_pcall (L, 2, 1, 0) != 0) {
msg_info ("call to %s failed", data->func);
}
/* retrieve result */
if (!lua_isnumber (L, -1)) {
msg_info ("function %s must return a number", data->func);
}
res = lua_tonumber (L, -1);
lua_pop (L, 1); /* pop returned value */
data->score += res;
}
double
rspamd_lua_consolidation_func (struct rspamd_task *task,
const gchar *metric_name,
const gchar *function_name)
{
struct metric_result *metric_res;
double res = 0.;
struct consolidation_callback_data data = { task, 0, function_name };
if (function_name == NULL) {
return 0;
}
metric_res = g_hash_table_lookup (task->results, metric_name);
if (metric_res == NULL) {
return res;
}
g_hash_table_foreach (metric_res->symbols, lua_consolidation_callback,
&data);
return data.score;
}
double
rspamd_lua_normalize (struct rspamd_config *cfg, long double score, void *params)
{
GList *p = params;
long double res = score;
lua_State *L = cfg->lua_state;
/* Call specified function and put input score on stack */
if (!p->data) {
msg_info ("bad function name while calling normalizer");
return score;
}
lua_getglobal (L, p->data);
lua_pushnumber (L, score);
if (lua_pcall (L, 1, 1, 0) != 0) {
msg_info ("call to %s failed", p->data);
}
/* retrieve result */
if (!lua_isnumber (L, -1)) {
msg_info ("function %s must return a number", p->data);
}
res = lua_tonumber (L, -1);
lua_pop (L, 1);
return res;
}
void
rspamd_lua_dumpstack (lua_State *L)
{
gint i, t, r = 0;
gint top = lua_gettop (L);
gchar buf[BUFSIZ];
r += rspamd_snprintf (buf + r, sizeof (buf) - r, "lua stack: ");
for (i = 1; i <= top; i++) { /* repeat for each level */
t = lua_type (L, i);
switch (t)
{
case LUA_TSTRING: /* strings */
r += rspamd_snprintf (buf + r,
sizeof (buf) - r,
"str: %s",
lua_tostring (L, i));
break;
case LUA_TBOOLEAN: /* booleans */
r += rspamd_snprintf (buf + r, sizeof (buf) - r,lua_toboolean (L,
i) ? "bool: true" : "bool: false");
break;
case LUA_TNUMBER: /* numbers */
r += rspamd_snprintf (buf + r,
sizeof (buf) - r,
"number: %.2f",
lua_tonumber (L, i));
break;
default: /* other values */
r += rspamd_snprintf (buf + r,
sizeof (buf) - r,
"type: %s",
lua_typename (L, t));
break;
}
if (i < top) {
r += rspamd_snprintf (buf + r, sizeof (buf) - r, " -> "); /* put a separator */
}
}
msg_info (buf);
}
gpointer
rspamd_lua_check_class (lua_State *L, gint index, const gchar *name)
{
gpointer p;
if (lua_type (L, index) == LUA_TUSERDATA) {
p = lua_touserdata (L, index);
if (p) {
if (lua_getmetatable (L, index)) {
lua_getfield (L, LUA_REGISTRYINDEX, name); /* get correct metatable */
if (lua_rawequal (L, -1, -2)) { /* does it have the correct mt? */
lua_pop (L, 2); /* remove both metatables */
return p;
}
lua_pop (L, 2);
}
}
}
return NULL;
}
int
rspamd_lua_typerror (lua_State *L, int narg, const char *tname)
{
const char *msg = lua_pushfstring (L, "%s expected, got %s", tname,
luaL_typename (L, narg));
return luaL_argerror (L, narg, msg);
}
void
rspamd_lua_add_preload (lua_State *L, const gchar *name, lua_CFunction func)
{
lua_getglobal (L, "package");
lua_pushstring (L, "preload");
lua_gettable (L, -2);
lua_pushcfunction (L, func);
lua_setfield (L, -2, name);
lua_pop (L, 1);
}
|