rspamd/src/libserver/cfg_rcl.c

/*-
 * 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 "cfg_rcl.h"
#include "rspamd.h"
#include "../../contrib/mumhash/mum.h"
#define HASH_CASELESS
#include "uthash_strcase.h"
#include "utlist.h"
#include "cfg_file.h"
#include "lua/lua_common.h"
#include "expression.h"
#include "composites.h"
#include "libserver/worker_util.h"
#include "unix-std.h"
#include "cryptobox.h"
#include "libutil/multipattern.h"
#include "libmime/email_addr.h"
#include "libmime/lang_detection.h"

#ifdef HAVE_SYSLOG_H
#include <syslog.h>
#endif

#include <math.h>

struct rspamd_rcl_default_handler_data {
	struct rspamd_rcl_struct_parser pd;
	gchar *key;
	rspamd_rcl_default_handler_t handler;
	UT_hash_handle hh;
};

struct rspamd_rcl_section {
	const gchar *name;                  /**< name of section */
	const gchar *key_attr;
	const gchar *default_key;
	rspamd_rcl_handler_t handler;       /**< handler of section attributes */
	enum ucl_type type;         /**< type of attribute */
	gboolean required;                  /**< whether this param is required */
	gboolean strict_type;               /**< whether we need strict type */
	UT_hash_handle hh;                  /** hash handle */
	struct rspamd_rcl_section *subsections; /**< hash table of subsections */
	struct rspamd_rcl_default_handler_data *default_parser; /**< generic parsing fields */
	rspamd_rcl_section_fin_t fin; /** called at the end of section parsing */
	gpointer fin_ud;
	ucl_object_t *doc_ref;       /**< reference to the section's documentation */
};

struct rspamd_worker_param_key {
	const gchar *name;
	gpointer ptr;
};

struct rspamd_worker_param_parser {
	rspamd_rcl_default_handler_t handler;           /**< handler function									*/
	struct rspamd_rcl_struct_parser parser;         /**< parser attributes									*/

	struct rspamd_worker_param_key key;
};

struct rspamd_worker_cfg_parser {
	GHashTable *parsers;                            /**< parsers hash										*/
	gint type;                                      /**< workers quark										*/
	gboolean (*def_obj_parser)(ucl_object_t *obj, gpointer ud);   /**<
 														 default object parser								*/
	gpointer def_ud;
};

static gboolean rspamd_rcl_process_section (struct rspamd_config *cfg,
		struct rspamd_rcl_section *sec,
		gpointer ptr, const ucl_object_t *obj, rspamd_mempool_t *pool,
		GError **err);

/*
 * Common section handlers
 */
static gboolean
rspamd_rcl_logging_handler (rspamd_mempool_t *pool, const ucl_object_t *obj,
	const gchar *key, gpointer ud, struct rspamd_rcl_section *section,
	GError **err)
{
	const ucl_object_t *val;
	const gchar *facility = NULL, *log_type = NULL, *log_level = NULL;
	struct rspamd_config *cfg = ud;

	val = ucl_object_lookup (obj, "type");
	if (val != NULL && ucl_object_tostring_safe (val, &log_type)) {
		if (g_ascii_strcasecmp (log_type, "file") == 0) {
			/* Need to get filename */
			val = ucl_object_lookup (obj, "filename");
			if (val == NULL || val->type != UCL_STRING) {
				g_set_error (err,
					CFG_RCL_ERROR,
					ENOENT,
					"filename attribute must be specified for file logging type");
				return FALSE;
			}
			cfg->log_type = RSPAMD_LOG_FILE;
			cfg->log_file = rspamd_mempool_strdup (cfg->cfg_pool,
					ucl_object_tostring (val));
		}
		else if (g_ascii_strcasecmp (log_type, "syslog") == 0) {
			/* Need to get facility */
#ifdef HAVE_SYSLOG_H
			cfg->log_facility = LOG_DAEMON;
			cfg->log_type = RSPAMD_LOG_SYSLOG;
			val = ucl_object_lookup (obj, "facility");
			if (val != NULL && ucl_object_tostring_safe (val, &facility)) {
				if (g_ascii_strcasecmp (facility, "LOG_AUTH") == 0 ||
					g_ascii_strcasecmp (facility, "auth") == 0 ) {
					cfg->log_facility = LOG_AUTH;
				}
				else if (g_ascii_strcasecmp (facility, "LOG_CRON") == 0 ||
					g_ascii_strcasecmp (facility, "cron") == 0 ) {
					cfg->log_facility = LOG_CRON;
				}
				else if (g_ascii_strcasecmp (facility, "LOG_DAEMON") == 0 ||
					g_ascii_strcasecmp (facility, "daemon") == 0 ) {
					cfg->log_facility = LOG_DAEMON;
				}
				else if (g_ascii_strcasecmp (facility, "LOG_MAIL") == 0 ||
					g_ascii_strcasecmp (facility, "mail") == 0) {
					cfg->log_facility = LOG_MAIL;
				}
				else if (g_ascii_strcasecmp (facility, "LOG_USER") == 0 ||
					g_ascii_strcasecmp (facility, "user") == 0 ) {
					cfg->log_facility = LOG_USER;
				}
				else if (g_ascii_strcasecmp (facility, "LOG_LOCAL0") == 0 ||
					g_ascii_strcasecmp (facility, "local0") == 0) {
					cfg->log_facility = LOG_LOCAL0;
				}
				else if (g_ascii_strcasecmp (facility, "LOG_LOCAL1") == 0 ||
					g_ascii_strcasecmp (facility, "local1") == 0) {
					cfg->log_facility = LOG_LOCAL1;
				}
				else if (g_ascii_strcasecmp (facility, "LOG_LOCAL2") == 0 ||
					g_ascii_strcasecmp (facility, "local2") == 0) {
					cfg->log_facility = LOG_LOCAL2;
				}
				else if (g_ascii_strcasecmp (facility, "LOG_LOCAL3") == 0 ||
					g_ascii_strcasecmp (facility, "local3") == 0) {
					cfg->log_facility = LOG_LOCAL3;
				}
				else if (g_ascii_strcasecmp (facility, "LOG_LOCAL4") == 0 ||
					g_ascii_strcasecmp (facility, "local4") == 0) {
					cfg->log_facility = LOG_LOCAL4;
				}
				else if (g_ascii_strcasecmp (facility, "LOG_LOCAL5") == 0 ||
					g_ascii_strcasecmp (facility, "local5") == 0) {
					cfg->log_facility = LOG_LOCAL5;
				}
				else if (g_ascii_strcasecmp (facility, "LOG_LOCAL6") == 0 ||
					g_ascii_strcasecmp (facility, "local6") == 0) {
					cfg->log_facility = LOG_LOCAL6;
				}
				else if (g_ascii_strcasecmp (facility, "LOG_LOCAL7") == 0 ||
					g_ascii_strcasecmp (facility, "local7") == 0) {
					cfg->log_facility = LOG_LOCAL7;
				}
				else {
					g_set_error (err,
						CFG_RCL_ERROR,
						EINVAL,
						"invalid log facility: %s",
						facility);
					return FALSE;
				}
			}
#endif
		}
		else if (g_ascii_strcasecmp (log_type,
			"stderr") == 0 || g_ascii_strcasecmp (log_type, "console") == 0) {
			cfg->log_type = RSPAMD_LOG_CONSOLE;
		}
		else {
			g_set_error (err,
				CFG_RCL_ERROR,
				EINVAL,
				"invalid log type: %s",
				log_type);
			return FALSE;
		}
	}
	else {
		/* No type specified */
		msg_warn_config (
			"logging type is not specified correctly, log output to the console");
	}

	/* Handle log level */
	val = ucl_object_lookup (obj, "level");
	if (val != NULL && ucl_object_tostring_safe (val, &log_level)) {
		if (g_ascii_strcasecmp (log_level, "error") == 0) {
			cfg->log_level = G_LOG_LEVEL_ERROR | G_LOG_LEVEL_CRITICAL;
		}
		else if (g_ascii_strcasecmp (log_level, "warning") == 0) {
			cfg->log_level = G_LOG_LEVEL_WARNING;
		}
		else if (g_ascii_strcasecmp (log_level, "info") == 0) {
			cfg->log_level = G_LOG_LEVEL_INFO | G_LOG_LEVEL_MESSAGE;
		}
		else if (g_ascii_strcasecmp (log_level, "message") == 0 ||
				g_ascii_strcasecmp (log_level, "notice") == 0) {
			cfg->log_level =  G_LOG_LEVEL_MESSAGE;
		}
		else if (g_ascii_strcasecmp (log_level, "silent") == 0) {
			cfg->log_level =  G_LOG_LEVEL_MESSAGE | G_LOG_LEVEL_INFO;
			cfg->log_silent_workers = TRUE;
		}
		else if (g_ascii_strcasecmp (log_level, "debug") == 0) {
			cfg->log_level = G_LOG_LEVEL_DEBUG;
		}
		else {
			g_set_error (err,
				CFG_RCL_ERROR,
				EINVAL,
				"invalid log level: %s",
				log_level);
			return FALSE;
		}
	}

	/* Handle flags */
	val = ucl_object_lookup_any (obj, "color", "log_color", NULL);
	if (val && ucl_object_toboolean (val)) {
		cfg->log_flags |= RSPAMD_LOG_FLAG_COLOR;
	}

	val = ucl_object_lookup_any (obj, "systemd", "log_systemd", NULL);
	if (val && ucl_object_toboolean (val)) {
		cfg->log_flags |= RSPAMD_LOG_FLAG_SYSTEMD;
	}

	val = ucl_object_lookup (obj, "log_re_cache");
	if (val && ucl_object_toboolean (val)) {
		cfg->log_flags |= RSPAMD_LOG_FLAG_RE_CACHE;
	}

	val = ucl_object_lookup_any (obj, "usec", "log_usec", NULL);
	if (val && ucl_object_toboolean (val)) {
		cfg->log_flags |= RSPAMD_LOG_FLAG_USEC;
	}

	return rspamd_rcl_section_parse_defaults (cfg, section, cfg->cfg_pool, obj,
			cfg, err);
}

static gboolean
rspamd_rcl_options_handler (rspamd_mempool_t *pool, const ucl_object_t *obj,
	const gchar *key, gpointer ud,
	struct rspamd_rcl_section *section, GError **err)
{
	const ucl_object_t *dns, *upstream, *neighbours;
	struct rspamd_config *cfg = ud;
	struct rspamd_rcl_section *dns_section, *upstream_section, *neighbours_section;

	HASH_FIND_STR (section->subsections, "dns", dns_section);

	dns = ucl_object_lookup (obj, "dns");
	if (dns_section != NULL && dns != NULL) {
		if (!rspamd_rcl_section_parse_defaults (cfg,
				dns_section, cfg->cfg_pool, dns,
				cfg, err)) {
			return FALSE;
		}
	}

	HASH_FIND_STR (section->subsections, "upstream", upstream_section);

	upstream = ucl_object_lookup (obj, "upstream");
	if (upstream_section != NULL && upstream != NULL) {
		if (!rspamd_rcl_section_parse_defaults (cfg,
				upstream_section, cfg->cfg_pool,
				upstream, cfg, err)) {
			return FALSE;
		}
	}

	HASH_FIND_STR (section->subsections, "neighbours", neighbours_section);

	neighbours = ucl_object_lookup (obj, "neighbours");
	if (neighbours_section != NULL && neighbours != NULL) {
		const ucl_object_t *cur;

		LL_FOREACH (neighbours, cur) {
			if (!rspamd_rcl_process_section (cfg, neighbours_section, cfg, cur,
					pool, err)) {
				return FALSE;
			}
		}
	}

	if (rspamd_rcl_section_parse_defaults (cfg,
			section, cfg->cfg_pool, obj,
			cfg, err)) {
		/* We need to init this early */
		rspamd_multipattern_library_init (cfg->hs_cache_dir);

		return TRUE;
	}

	return FALSE;
}

struct rspamd_rcl_symbol_data {
	struct rspamd_symbols_group *gr;
	struct rspamd_config *cfg;
};

static gboolean
rspamd_rcl_group_handler (rspamd_mempool_t *pool, const ucl_object_t *obj,
		const gchar *key, gpointer ud,
		struct rspamd_rcl_section *section, GError **err)
{
	struct rspamd_config *cfg = ud;
	struct rspamd_symbols_group *gr;
	const ucl_object_t *val;
	struct rspamd_rcl_section *subsection;
	struct rspamd_rcl_symbol_data sd;

	g_assert (key != NULL);

	gr = g_hash_table_lookup (cfg->groups, key);

	if (gr == NULL) {
		gr = rspamd_config_new_group (cfg, key);
	}

	if (!rspamd_rcl_section_parse_defaults (cfg, section, pool, obj,
			gr, err)) {
		return FALSE;
	}

	sd.gr = gr;
	sd.cfg = cfg;

	/* Handle symbols */
	val = ucl_object_lookup (obj, "symbols");
	if (val != NULL && ucl_object_type (val) == UCL_OBJECT) {
		HASH_FIND_STR (section->subsections, "symbols", subsection);
		g_assert (subsection != NULL);
		if (!rspamd_rcl_process_section (cfg, subsection, &sd, val,
				pool, err)) {

			return FALSE;
		}
	}

	return TRUE;
}

static gboolean
rspamd_rcl_symbol_handler (rspamd_mempool_t *pool, const ucl_object_t *obj,
		const gchar *key, gpointer ud,
		struct rspamd_rcl_section *section, GError **err)
{
	struct rspamd_rcl_symbol_data *sd = ud;
	struct rspamd_config *cfg;
	const ucl_object_t *elt;
	const gchar *description = NULL;
	gdouble score = 0.0;
	guint priority = 1, flags = 0;
	gint nshots;

	g_assert (key != NULL);
	cfg = sd->cfg;
	nshots = cfg->default_max_shots;

	if ((elt = ucl_object_lookup (obj, "one_shot")) != NULL) {
		if (ucl_object_type (elt) != UCL_BOOLEAN) {
			g_set_error (err,
					CFG_RCL_ERROR,
					EINVAL,
					"one_shot attribute is not boolean for symbol: '%s'",
					key);

			return FALSE;
		}
		if (ucl_object_toboolean (elt)) {
			nshots = 1;
		}
	}

	if ((elt = ucl_object_lookup (obj, "any_shot")) != NULL) {
		if (ucl_object_type (elt) != UCL_BOOLEAN) {
			g_set_error (err,
					CFG_RCL_ERROR,
					EINVAL,
					"any_shot attribute is not boolean for symbol: '%s'",
					key);

			return FALSE;
		}
		if (ucl_object_toboolean (elt)) {
			nshots = -1;
		}
	}

	if ((elt = ucl_object_lookup (obj, "one_param")) != NULL) {
		if (ucl_object_type (elt) != UCL_BOOLEAN) {
			g_set_error (err,
					CFG_RCL_ERROR,
					EINVAL,
					"one_param attribute is not boolean for symbol: '%s'",
					key);

			return FALSE;
		}

		if (ucl_object_toboolean (elt)) {
			flags |= RSPAMD_SYMBOL_FLAG_ONEPARAM;
		}
	}

	if ((elt = ucl_object_lookup (obj, "ignore")) != NULL) {
		if (ucl_object_type (elt) != UCL_BOOLEAN) {
			g_set_error (err,
					CFG_RCL_ERROR,
					EINVAL,
					"ignore attribute is not boolean for symbol: '%s'",
					key);

			return FALSE;
		}

		if (ucl_object_toboolean (elt)) {
			flags |= RSPAMD_SYMBOL_FLAG_IGNORE;
		}
	}

	if ((elt = ucl_object_lookup (obj, "nshots")) != NULL) {
		if (ucl_object_type (elt) != UCL_FLOAT && ucl_object_type (elt) != UCL_INT) {
			g_set_error (err,
					CFG_RCL_ERROR,
					EINVAL,
					"nshots attribute is not numeric for symbol: '%s'",
					key);

			return FALSE;
		}

		nshots = ucl_object_toint (elt);
	}

	elt = ucl_object_lookup_any (obj, "score", "weight", NULL);
	if (elt) {
		if (ucl_object_type (elt) != UCL_FLOAT && ucl_object_type (elt) != UCL_INT) {
			g_set_error (err,
					CFG_RCL_ERROR,
					EINVAL,
					"score attribute is not numeric for symbol: '%s'",
					key);

			return FALSE;
		}

		score = ucl_object_todouble (elt);
	}

	elt = ucl_object_lookup (obj, "priority");
	if (elt) {
		if (ucl_object_type (elt) != UCL_FLOAT && ucl_object_type (elt) != UCL_INT) {
			g_set_error (err,
					CFG_RCL_ERROR,
					EINVAL,
					"priority attribute is not numeric for symbol: '%s'",
					key);

			return FALSE;
		}

		priority = ucl_object_toint (elt);
	}
	else {
		priority = ucl_object_get_priority (obj) + 1;
	}

	elt = ucl_object_lookup (obj, "description");
	if (elt) {
		description = ucl_object_tostring (elt);
	}

	if (sd->gr) {
		rspamd_config_add_symbol (cfg, key, score,
				description, sd->gr->name, flags, priority, nshots);
	}
	else {
		rspamd_config_add_symbol (cfg, key, score,
				description, NULL, flags, priority, nshots);
	}

	elt = ucl_object_lookup (obj, "groups");

	if (elt) {
		ucl_object_iter_t gr_it;
		const ucl_object_t *cur_gr;

		gr_it = ucl_object_iterate_new (elt);

		while ((cur_gr = ucl_object_iterate_safe (gr_it, true)) != NULL) {
			rspamd_config_add_symbol_group (cfg, key,
					ucl_object_tostring (cur_gr));
		}

		ucl_object_iterate_free (gr_it);
	}

	return TRUE;
}

static gboolean
rspamd_rcl_actions_handler (rspamd_mempool_t *pool, const ucl_object_t *obj,
		const gchar *key, gpointer ud,
		struct rspamd_rcl_section *section, GError **err)
{
	gdouble action_score;
	struct rspamd_config *cfg = ud;
	gint action_value;
	const ucl_object_t *cur;
	ucl_object_iter_t it;

	it = ucl_object_iterate_new (obj);

	while ((cur = ucl_object_iterate_safe (it, true)) != NULL) {
		if (!rspamd_action_from_str (ucl_object_key (cur), &action_value)) {
			continue;
		}
		else {
			if (ucl_object_type (cur) == UCL_NULL) {
				action_score = NAN;
			}
			else {
				if (!ucl_object_todouble_safe (cur, &action_score)) {
					g_set_error (err,
							CFG_RCL_ERROR,
							EINVAL,
							"invalid action definition: '%s'",
							ucl_object_key (cur));
					ucl_object_iterate_free (it);

					return FALSE;
				}
			}

			rspamd_config_set_action_score (cfg,
					ucl_object_key (cur),
					action_score,
					ucl_object_get_priority (cur));
		}
	}

	ucl_object_iterate_free (it);

	return rspamd_rcl_section_parse_defaults (cfg, section, pool, obj, cfg, err);
}

static gboolean
rspamd_rcl_worker_handler (rspamd_mempool_t *pool, const ucl_object_t *obj,
		const gchar *key, gpointer ud,
		struct rspamd_rcl_section *section, GError **err)
{
	const ucl_object_t *val, *cur, *cur_obj;
	ucl_object_t *robj;
	ucl_object_iter_t it = NULL;
	const gchar *worker_type, *worker_bind;
	struct rspamd_config *cfg = ud;
	GQuark qtype;
	struct rspamd_worker_conf *wrk;
	struct rspamd_worker_cfg_parser *wparser;
	struct rspamd_worker_param_parser *whandler;
	struct rspamd_worker_param_key srch;

	g_assert (key != NULL);
	worker_type = key;

	qtype = g_quark_try_string (worker_type);
	if (qtype != 0) {
		wrk = rspamd_config_new_worker (cfg, NULL);
		wrk->options = ucl_object_copy (obj);
		wrk->worker = rspamd_get_worker_by_type (cfg, qtype);

		if (wrk->worker == NULL) {
			g_set_error (err,
					CFG_RCL_ERROR,
					EINVAL,
					"unknown worker type: %s",
					worker_type);
			return FALSE;
		}

		wrk->type = qtype;

		if (wrk->worker->worker_init_func) {
			wrk->ctx = wrk->worker->worker_init_func (cfg);
		}
	}
	else {
		msg_err_config ("unknown worker type: %s", worker_type);
		return TRUE;
	}

	val = ucl_object_lookup_any (obj, "bind_socket", "listen", "bind", NULL);
	/* This name is more logical */
	if (val != NULL) {
		it = ucl_object_iterate_new (val);

		while ((cur = ucl_object_iterate_safe (it, true)) != NULL) {
			if (!ucl_object_tostring_safe (cur, &worker_bind)) {
				continue;
			}
			if (!rspamd_parse_bind_line (cfg, wrk, worker_bind)) {
				g_set_error (err,
					CFG_RCL_ERROR,
					EINVAL,
					"cannot parse bind line: %s",
					worker_bind);
				ucl_object_iterate_free (it);
				return FALSE;
			}
		}

		ucl_object_iterate_free (it);
	}

	if (!rspamd_rcl_section_parse_defaults (cfg, section, cfg->cfg_pool, obj,
			wrk, err)) {
		return FALSE;
	}

	/* Parse other attributes */
	wparser = g_hash_table_lookup (cfg->wrk_parsers, &qtype);

	if (wparser != NULL && obj->type == UCL_OBJECT) {
		it = ucl_object_iterate_new (obj);

		while ((cur = ucl_object_iterate_full (it, UCL_ITERATE_EXPLICIT)) != NULL) {
			srch.name = ucl_object_key (cur);
			srch.ptr = wrk->ctx; /* XXX: is it valid? */
			whandler = g_hash_table_lookup (wparser->parsers, &srch);

			if (whandler != NULL) {

				LL_FOREACH (cur, cur_obj) {
					if (!whandler->handler (cfg->cfg_pool,
							cur_obj,
							&whandler->parser,
							section,
							err)) {

						ucl_object_iterate_free (it);
						return FALSE;
					}

					if (!(whandler->parser.flags & RSPAMD_CL_FLAG_MULTIPLE)) {
						break;
					}
				}
			}
		}

		ucl_object_iterate_free (it);

		if (wparser->def_obj_parser != NULL) {
			robj = ucl_object_ref (obj);

			if (!wparser->def_obj_parser (robj, wparser->def_ud)) {
				ucl_object_unref (robj);

				return FALSE;
			}

			ucl_object_unref (robj);
		}
	}

	cfg->workers = g_list_prepend (cfg->workers, wrk);

	return TRUE;
}

static gboolean
rspamd_rcl_lua_handler (rspamd_mempool_t *pool, const ucl_object_t *obj,
		const gchar *key, gpointer ud,
		struct rspamd_rcl_section *section, GError **err)
{
	struct rspamd_config *cfg = ud;
	const gchar *lua_src = rspamd_mempool_strdup (pool,
			ucl_object_tostring (obj));
	gchar *cur_dir, *lua_dir, *lua_file, *tmp1, *tmp2;
	lua_State *L = cfg->lua_state;
	GString *tb;
	gint err_idx;

	tmp1 = g_strdup (lua_src);
	tmp2 = g_strdup (lua_src);
	lua_dir = dirname (tmp1);
	lua_file = basename (tmp2);

	if (lua_dir && lua_file) {
		cur_dir = g_malloc (PATH_MAX);
		if (getcwd (cur_dir, PATH_MAX) != NULL && chdir (lua_dir) != -1) {
			/* Push traceback function */
			lua_pushcfunction (L, &rspamd_lua_traceback);
			err_idx = lua_gettop (L);

			/* Load file */
			if (luaL_loadfile (L, lua_file) != 0) {
				g_set_error (err,
					CFG_RCL_ERROR,
					EINVAL,
					"cannot load lua file %s: %s",
					lua_src,
					lua_tostring (L, -1));
				if (chdir (cur_dir) == -1) {
					msg_err_config ("cannot chdir to %s: %s", cur_dir,
						strerror (errno));
				}
				g_free (cur_dir);
				g_free (tmp1);
				g_free (tmp2);
				return FALSE;
			}

			/* Now do it */
			if (lua_pcall (L, 0, 0, err_idx) != 0) {
				tb = lua_touserdata (L, -1);
				g_set_error (err,
						CFG_RCL_ERROR,
						EINVAL,
						"cannot init lua file %s: %s",
						lua_src,
						tb->str);
				g_string_free (tb, TRUE);
				lua_pop (L, 2);

				if (chdir (cur_dir) == -1) {
					msg_err_config ("cannot chdir to %s: %s", cur_dir,
						strerror (errno));
				}

				g_free (cur_dir);
				g_free (tmp1);
				g_free (tmp2);

				return FALSE;
			}

			lua_pop (L, 1);
		}
		else {
			g_set_error (err, CFG_RCL_ERROR, ENOENT, "cannot chdir to %s: %s",
					lua_dir, strerror (errno));
			if (chdir (cur_dir) == -1) {
				msg_err_config ("cannot chdir to %s: %s", cur_dir, strerror (errno));
			}
			g_free (cur_dir);
			g_free (tmp1);
			g_free (tmp2);
			return FALSE;

		}
		if (chdir (cur_dir) == -1) {
			msg_err_config ("cannot chdir to %s: %s", cur_dir, strerror (errno));
		}
		g_free (cur_dir);
		g_free (tmp1);
		g_free (tmp2);
	}
	else {
		g_free (tmp1);
		g_free (tmp2);
		g_set_error (err, CFG_RCL_ERROR, ENOENT, "cannot find to %s: %s",
			lua_src, strerror (errno));
		return FALSE;
	}

	return TRUE;
}

gboolean
rspamd_rcl_add_lua_plugins_path (struct rspamd_config *cfg,
		const gchar *path,
		GError **err)
{
	struct stat st;
	struct script_module *cur_mod;
	GPtrArray *paths;
	gchar *fname, *ext_pos;
	guint i;

	if (stat (path, &st) == -1) {
		g_set_error (err,
			CFG_RCL_ERROR,
			errno,
			"cannot stat path %s, %s",
			path,
			strerror (errno));
		return FALSE;
	}

	/* Handle directory */
	if (S_ISDIR (st.st_mode)) {
		paths = rspamd_glob_path (path, "*.lua", TRUE, err);

		if (!paths) {
			return FALSE;
		}

		PTR_ARRAY_FOREACH (paths, i, fname) {
			cur_mod =
					rspamd_mempool_alloc (cfg->cfg_pool,
							sizeof (struct script_module));
			cur_mod->path = rspamd_mempool_strdup (cfg->cfg_pool, fname);
			cur_mod->name = g_path_get_basename (cur_mod->path);
			rspamd_mempool_add_destructor (cfg->cfg_pool, g_free,
					cur_mod->name);
			ext_pos = strstr (cur_mod->name, ".lua");

			if (ext_pos != NULL) {
				*ext_pos = '\0';
			}

			if (cfg->script_modules == NULL) {
				cfg->script_modules = g_list_append (cfg->script_modules,
						cur_mod);
				rspamd_mempool_add_destructor (cfg->cfg_pool,
						(rspamd_mempool_destruct_t) g_list_free,
						cfg->script_modules);
			} else {
				cfg->script_modules = g_list_append (cfg->script_modules,
						cur_mod);
			}
		}

		g_ptr_array_free (paths, TRUE);
	}
	else {
		/* Handle single file */
		cur_mod =
			rspamd_mempool_alloc (cfg->cfg_pool, sizeof (struct script_module));
		cur_mod->path = rspamd_mempool_strdup (cfg->cfg_pool, path);
		cur_mod->name = g_path_get_basename (cur_mod->path);
		rspamd_mempool_add_destructor (cfg->cfg_pool, g_free,
				cur_mod->name);
		ext_pos = strstr (cur_mod->name, ".lua");

		if (ext_pos != NULL) {
			*ext_pos = '\0';
		}

		if (cfg->script_modules == NULL) {
			cfg->script_modules = g_list_append (cfg->script_modules,
					cur_mod);
			rspamd_mempool_add_destructor (cfg->cfg_pool,
					(rspamd_mempool_destruct_t)g_list_free,
					cfg->script_modules);
		}
		else {
			cfg->script_modules = g_list_append (cfg->script_modules,
					cur_mod);
		}
	}

	return TRUE;
}

static gboolean
rspamd_rcl_modules_handler (rspamd_mempool_t *pool, const ucl_object_t *obj,
		const gchar *key, gpointer ud,
		struct rspamd_rcl_section *section, GError **err)
{
	const ucl_object_t *val, *cur;
	struct rspamd_config *cfg = ud;
	const gchar *data;

	if (obj->type == UCL_OBJECT) {
		val = ucl_object_lookup (obj, "path");

		LL_FOREACH (val, cur)
		{
			if (ucl_object_tostring_safe (cur, &data)) {
				if (!rspamd_rcl_add_lua_plugins_path (cfg,
						rspamd_mempool_strdup (cfg->cfg_pool, data), err)) {
					return FALSE;
				}
			}
		}
	}
	else if (ucl_object_tostring_safe (obj, &data)) {
		if (!rspamd_rcl_add_lua_plugins_path (cfg,
				rspamd_mempool_strdup (cfg->cfg_pool, data), err)) {
			return FALSE;
		}
	}
	else {
		g_set_error (err,
			CFG_RCL_ERROR,
			EINVAL,
			"module parameter has wrong type (must be an object or a string)");
		return FALSE;
	}

	return TRUE;
}

struct statfile_parser_data {
	struct rspamd_config *cfg;
	struct rspamd_classifier_config *ccf;
};

static gboolean
rspamd_rcl_statfile_handler (rspamd_mempool_t *pool, const ucl_object_t *obj,
		const gchar *key, gpointer ud,
		struct rspamd_rcl_section *section, GError **err)
{
	struct statfile_parser_data *stud = ud;
	struct rspamd_classifier_config *ccf;
	struct rspamd_config *cfg;
	const ucl_object_t *val;
	struct rspamd_statfile_config *st;
	GList *labels;

	g_assert (key != NULL);

	cfg = stud->cfg;
	ccf = stud->ccf;

	st = rspamd_config_new_statfile (cfg, NULL);
	st->symbol = rspamd_mempool_strdup (cfg->cfg_pool, key);

	if (rspamd_rcl_section_parse_defaults (cfg, section, pool, obj, st, err)) {
		ccf->statfiles = rspamd_mempool_glist_prepend (pool, ccf->statfiles, st);

		if (st->label != NULL) {
			labels = g_hash_table_lookup (ccf->labels, st->label);
			if (labels != NULL) {
				labels = g_list_append (labels, st);
			}
			else {
				g_hash_table_insert (ccf->labels, st->label,
					g_list_prepend (NULL, st));
			}
		}

		if (st->symbol != NULL) {
			g_hash_table_insert (cfg->classifiers_symbols, st->symbol, st);
		}
		else {
			g_set_error (err,
				CFG_RCL_ERROR,
				EINVAL,
				"statfile must have a symbol defined");
			return FALSE;
		}

		st->opts = (ucl_object_t *)obj;
		st->clcf = ccf;

		val = ucl_object_lookup (obj, "spam");
		if (val == NULL) {
			msg_info_config (
				"statfile %s has no explicit 'spam' setting, trying to guess by symbol",
				st->symbol);
			if (rspamd_substring_search_caseless (st->symbol,
					strlen (st->symbol),"spam", 4) != -1) {
				st->is_spam = TRUE;
			}
			else if (rspamd_substring_search_caseless (st->symbol,
					strlen (st->symbol),"ham", 3) != -1) {
				st->is_spam = FALSE;
			}
			else {
				g_set_error (err,
					CFG_RCL_ERROR,
					EINVAL,
					"cannot guess spam setting from %s",
					st->symbol);
				return FALSE;
			}
			msg_info_config ("guessed that statfile with symbol %s is %s",
				st->symbol,
				st->is_spam ?
				"spam" : "ham");
		}
		return TRUE;
	}

	return FALSE;
}

static gboolean
rspamd_rcl_classifier_handler (rspamd_mempool_t *pool,
	const ucl_object_t *obj,
	const gchar *key,
	gpointer ud,
	struct rspamd_rcl_section *section,
	GError **err)
{
	const ucl_object_t *val, *cur;
	ucl_object_iter_t it = NULL;
	struct rspamd_config *cfg = ud;
	struct statfile_parser_data stud;
	const gchar *st_key;
	struct rspamd_classifier_config *ccf;
	gboolean res = TRUE;
	struct rspamd_rcl_section *stat_section;
	struct rspamd_tokenizer_config *tkcf = NULL;
	lua_State *L;

	g_assert (key != NULL);
	ccf = rspamd_config_new_classifier (cfg, NULL);

	ccf->classifier = rspamd_mempool_strdup (cfg->cfg_pool, key);

	if (rspamd_rcl_section_parse_defaults (cfg, section, cfg->cfg_pool, obj,
			ccf, err)) {

		HASH_FIND_STR (section->subsections, "statfile", stat_section);

		if (ccf->classifier == NULL) {
			ccf->classifier = "bayes";
		}

		if (ccf->name == NULL) {
			ccf->name = ccf->classifier;
		}

		it = ucl_object_iterate_new (obj);

		while ((val = ucl_object_iterate_safe (it, true)) != NULL && res) {
			st_key = ucl_object_key (val);

			if (st_key != NULL) {
				if (g_ascii_strcasecmp (st_key, "statfile") == 0) {
					LL_FOREACH (val, cur) {
						stud.cfg = cfg;
						stud.ccf = ccf;
						res = rspamd_rcl_process_section (cfg, stat_section, &stud,
								cur, cfg->cfg_pool, err);

						if (!res) {
							ucl_object_iterate_free (it);

							return FALSE;
						}
					}
				}
				else if (g_ascii_strcasecmp (st_key, "tokenizer") == 0) {
					tkcf = rspamd_mempool_alloc0 (cfg->cfg_pool, sizeof (*tkcf));

					if (ucl_object_type (val) == UCL_STRING) {
						tkcf->name = ucl_object_tostring (val);
					}
					else if (ucl_object_type (val) == UCL_OBJECT) {
						cur = ucl_object_lookup (val, "name");
						if (cur != NULL) {
							tkcf->name = ucl_object_tostring (cur);
							tkcf->opts = val;
						}
						else {
							cur = ucl_object_lookup (val, "type");
							if (cur != NULL) {
								tkcf->name = ucl_object_tostring (cur);
								tkcf->opts = val;
							}
						}
					}
				}
			}
		}

		ucl_object_iterate_free (it);
	}
	else {
		msg_err_config ("fatal configuration error, cannot parse statfile definition");
	}

	if (tkcf == NULL) {
		tkcf = rspamd_mempool_alloc0 (cfg->cfg_pool, sizeof (*tkcf));
		tkcf->name = NULL;

	}

	ccf->tokenizer = tkcf;

	/* Handle lua conditions */
	val = ucl_object_lookup_any (obj, "condition", "learn_condition", NULL);

	if (val) {
		LL_FOREACH (val, cur) {
			if (ucl_object_type (cur) == UCL_STRING) {
				const gchar *lua_script;
				gsize slen;
				gint err_idx, ref_idx;
				GString *tb = NULL;

				lua_script = ucl_object_tolstring (cur, &slen);
				L = cfg->lua_state;
				lua_pushcfunction (L, &rspamd_lua_traceback);
				err_idx = lua_gettop (L);


				/* Load file */
				if (luaL_loadbuffer (L, lua_script, slen, "learn_condition") != 0) {
					g_set_error (err,
							CFG_RCL_ERROR,
							EINVAL,
							"cannot load lua condition script: %s",
							lua_tostring (L, -1));
					lua_settop (L, 0); /* Error function */

					return FALSE;
				}

				/* Now do it */
				if (lua_pcall (L, 0, 1, err_idx) != 0) {
					tb = lua_touserdata (L, -1);
					g_set_error (err,
							CFG_RCL_ERROR,
							EINVAL,
							"cannot init lua condition script: %s",
							tb->str);
					g_string_free (tb, TRUE);
					lua_settop (L, 0);

					return FALSE;
				}

				if (!lua_isfunction (L, -1)) {
					g_set_error (err,
							CFG_RCL_ERROR,
							EINVAL,
							"cannot init lua condition script: "
							"must return function");
					lua_settop (L, 0);

					return FALSE;
				}

				ref_idx = luaL_ref (L, LUA_REGISTRYINDEX);
				rspamd_lua_add_ref_dtor (L, cfg->cfg_pool, ref_idx);
				ccf->learn_conditions = rspamd_mempool_glist_append (
						cfg->cfg_pool,
						ccf->learn_conditions,
						GINT_TO_POINTER (ref_idx));
				lua_settop (L, 0);
			}
		}
	}

	ccf->opts = (ucl_object_t *)obj;
	cfg->classifiers = g_list_prepend (cfg->classifiers, ccf);

	return res;
}

static gboolean
rspamd_rcl_composite_handler (rspamd_mempool_t *pool,
	const ucl_object_t *obj,
	const gchar *key,
	gpointer ud,
	struct rspamd_rcl_section *section,
	GError **err)
{
	const ucl_object_t *val, *elt;
	struct rspamd_expression *expr;
	struct rspamd_config *cfg = ud;
	struct rspamd_composite *composite;
	const gchar *composite_name, *composite_expression, *group,
		*description;
	gdouble score;
	gboolean new = TRUE;

	g_assert (key != NULL);

	composite_name = key;

	val = ucl_object_lookup (obj, "enabled");
	if (val != NULL && !ucl_object_toboolean (val)) {
		msg_info_config ("composite %s is disabled", composite_name);
		return TRUE;
	}

	if (g_hash_table_lookup (cfg->composite_symbols, composite_name) != NULL) {
		msg_warn_config ("composite %s is redefined", composite_name);
		new = FALSE;
	}

	val = ucl_object_lookup (obj, "expression");
	if (val == NULL || !ucl_object_tostring_safe (val, &composite_expression)) {
		g_set_error (err,
			CFG_RCL_ERROR,
			EINVAL,
			"composite must have an expression defined");
		return FALSE;
	}

	if (!rspamd_parse_expression (composite_expression, 0, &composite_expr_subr,
				NULL, cfg->cfg_pool, err, &expr)) {
		if (err && *err) {
			msg_err_config ("cannot parse composite expression for %s: %e",
				composite_name, *err);
		}
		else {
			msg_err_config ("cannot parse composite expression for %s: unknown error",
				composite_name);
		}

		return FALSE;
	}

	composite =
		rspamd_mempool_alloc0 (cfg->cfg_pool, sizeof (struct rspamd_composite));
	composite->expr = expr;
	composite->id = g_hash_table_size (cfg->composite_symbols);
	composite->str_expr = composite_expression;
	composite->sym = composite_name;

	val = ucl_object_lookup (obj, "score");
	if (val != NULL && ucl_object_todouble_safe (val, &score)) {
		/* Also set score in the metric */

		val = ucl_object_lookup (obj, "group");
		if (val != NULL) {
			group = ucl_object_tostring (val);
		}
		else {
			group = "composite";
		}

		val = ucl_object_lookup (obj, "description");
		if (val != NULL) {
			description = ucl_object_tostring (val);
		}
		else {
			description = composite_expression;
		}

		rspamd_config_add_symbol (cfg, composite_name, score,
				description, group, FALSE, FALSE,
				1);

		elt = ucl_object_lookup (obj, "groups");

		if (elt) {
			ucl_object_iter_t gr_it;
			const ucl_object_t *cur_gr;

			gr_it = ucl_object_iterate_new (elt);

			while ((cur_gr = ucl_object_iterate_safe (gr_it, true)) != NULL) {
				rspamd_config_add_symbol_group (cfg, key,
						ucl_object_tostring (cur_gr));
			}

			ucl_object_iterate_free (gr_it);
		}
	}

	val = ucl_object_lookup (obj, "policy");

	if (val) {
		composite->policy = rspamd_composite_policy_from_str (
				ucl_object_tostring (val));

		if (composite->policy == RSPAMD_COMPOSITE_POLICY_UNKNOWN) {
			g_set_error (err,
					CFG_RCL_ERROR,
					EINVAL,
					"composite %s has incorrect policy", composite_name);
			return FALSE;
		}
	}

	g_hash_table_insert (cfg->composite_symbols,
			(gpointer)composite_name,
			composite);

	if (new) {
		rspamd_symcache_add_symbol (cfg->cache, composite_name, 0,
				NULL, NULL, SYMBOL_TYPE_COMPOSITE, -1);
	}

	return TRUE;
}

static gboolean
rspamd_rcl_composites_handler (rspamd_mempool_t *pool,
	const ucl_object_t *obj,
	const gchar *key,
	gpointer ud,
	struct rspamd_rcl_section *section,
	GError **err)
{
	ucl_object_iter_t it = NULL;
	const ucl_object_t *cur;
	gboolean success = TRUE;

	it = ucl_object_iterate_new (obj);

	while ((cur = ucl_object_iterate_safe (it, true))) {
		success = rspamd_rcl_composite_handler(pool, cur,
				ucl_object_key(cur), ud, section, err);
		if (!success) {
			break;
		}
	}

	ucl_object_iterate_free (it);

	return success;
}

static gboolean
rspamd_rcl_neighbours_handler (rspamd_mempool_t *pool,
		const ucl_object_t *obj,
		const gchar *key,
		gpointer ud,
		struct rspamd_rcl_section *section,
		GError **err)
{
	struct rspamd_config *cfg = ud;
	const ucl_object_t *hostval, *pathval;
	ucl_object_t *neigh;
	gboolean has_port = FALSE, has_proto = FALSE;
	GString *urlstr;
	const gchar *p;

	if (key == NULL) {
		g_set_error (err,
				CFG_RCL_ERROR,
				EINVAL,
				"missing name for neighbour");
		return FALSE;
	}

	hostval = ucl_object_lookup (obj, "host");

	if (hostval == NULL || ucl_object_type (hostval) != UCL_STRING) {
		g_set_error (err,
				CFG_RCL_ERROR,
				EINVAL,
				"missing host for neighbour: %s", ucl_object_key (obj));
		return FALSE;
	}

	neigh = ucl_object_typed_new (UCL_OBJECT);
	ucl_object_insert_key (neigh, ucl_object_copy (hostval), "host", 0, false);

	if ((p = strrchr (ucl_object_tostring (hostval), ':')) != NULL) {
		if (g_ascii_isdigit (p[1])) {
			has_port = TRUE;
		}
	}

	if (strstr (ucl_object_tostring (hostval), "://") != NULL) {
		has_proto = TRUE;
	}

	/* Now make url */
	urlstr = g_string_sized_new (63);
	pathval = ucl_object_lookup (obj, "path");

	if (!has_proto) {
		g_string_append_len (urlstr, "http://", sizeof ("http://") - 1);
	}

	g_string_append (urlstr, ucl_object_tostring (hostval));

	if (!has_port) {
		g_string_append (urlstr, ":11334");
	}

	if (pathval == NULL) {
		g_string_append (urlstr, "/");
	}
	else {
		g_string_append (urlstr,  ucl_object_tostring (pathval));
	}

	ucl_object_insert_key (neigh,
			ucl_object_fromlstring (urlstr->str, urlstr->len),
			"url", 0, false);
	g_string_free (urlstr, TRUE);
	ucl_object_insert_key (cfg->neighbours, neigh, key, 0, true);

	return TRUE;
}


struct rspamd_rcl_section *
rspamd_rcl_add_section (struct rspamd_rcl_section **top,
	const gchar *name, const gchar *key_attr, rspamd_rcl_handler_t handler,
	enum ucl_type type, gboolean required, gboolean strict_type)
{
	struct rspamd_rcl_section *new;
	ucl_object_t *parent_doc;

	new = g_malloc0 (sizeof (struct rspamd_rcl_section));
	new->name = name;
	new->key_attr = key_attr;
	new->handler = handler;
	new->type = type;
	new->strict_type = strict_type;

	if (*top == NULL) {
		parent_doc = NULL;
		new->doc_ref = NULL;
	}
	else {
		parent_doc = (*top)->doc_ref;
		new->doc_ref = ucl_object_ref (rspamd_rcl_add_doc_obj (parent_doc,
				NULL,
				name,
				type,
				NULL,
				0,
				NULL,
				0));
	}

	HASH_ADD_KEYPTR (hh, *top, new->name, strlen (new->name), new);
	return new;
}

struct rspamd_rcl_section *
rspamd_rcl_add_section_doc (struct rspamd_rcl_section **top,
		const gchar *name, const gchar *key_attr, rspamd_rcl_handler_t handler,
		enum ucl_type type, gboolean required, gboolean strict_type,
		ucl_object_t *doc_target,
		const gchar *doc_string)
{
	struct rspamd_rcl_section *new_section;

	new_section = g_malloc0 (sizeof (struct rspamd_rcl_section));
	new_section->name = name;
	new_section->key_attr = key_attr;
	new_section->handler = handler;
	new_section->type = type;
	new_section->strict_type = strict_type;

	new_section->doc_ref =  ucl_object_ref (rspamd_rcl_add_doc_obj (doc_target,
			doc_string,
			name,
			type,
			NULL,
			0,
			NULL,
			0));

	HASH_ADD_KEYPTR (hh, *top, new_section->name, strlen (new_section->name), new_section);
	return new_section;
}

struct rspamd_rcl_default_handler_data *
rspamd_rcl_add_default_handler (struct rspamd_rcl_section *section,
		const gchar *name,
		rspamd_rcl_default_handler_t handler,
		goffset offset,
		gint flags,
		const gchar *doc_string)
{
	struct rspamd_rcl_default_handler_data *nhandler;

	nhandler = g_malloc0 (sizeof (struct rspamd_rcl_default_handler_data));
	nhandler->key = g_strdup (name);
	nhandler->handler = handler;
	nhandler->pd.offset = offset;
	nhandler->pd.flags = flags;

	if (section->doc_ref != NULL) {
		rspamd_rcl_add_doc_obj (section->doc_ref,
				doc_string,
				name,
				UCL_NULL,
				handler,
				flags,
				NULL,
				0);
	}

	HASH_ADD_KEYPTR (hh, section->default_parser, nhandler->key, strlen (
			nhandler->key), nhandler);
	return nhandler;
}

struct rspamd_rcl_section *
rspamd_rcl_config_init (struct rspamd_config *cfg, GHashTable *skip_sections)
{
	struct rspamd_rcl_section *new = NULL, *sub, *ssub;

	/*
	 * Important notice:
	 * the order of parsing is equal to order of this initialization, therefore
	 * it is possible to init some portions of config prior to others
	 */

	/**
	 * Logging section
	 */
	if (!(skip_sections && g_hash_table_lookup (skip_sections, "logging"))) {
		sub = rspamd_rcl_add_section_doc (&new,
				"logging", NULL,
				rspamd_rcl_logging_handler,
				UCL_OBJECT,
				FALSE,
				TRUE,
				cfg->doc_strings,
				"Configure rspamd logging");
		/* Default handlers */
		rspamd_rcl_add_default_handler (sub,
				"log_buffer",
				rspamd_rcl_parse_struct_integer,
				G_STRUCT_OFFSET (struct rspamd_config, log_buf_size),
				RSPAMD_CL_FLAG_INT_32,
				"Size of log buffer in bytes (for file logging)");
		rspamd_rcl_add_default_handler (sub,
				"log_urls",
				rspamd_rcl_parse_struct_boolean,
				G_STRUCT_OFFSET (struct rspamd_config, log_urls),
				0,
				"Write each URL found in a message to the log file");
		rspamd_rcl_add_default_handler (sub,
				"debug_ip",
				rspamd_rcl_parse_struct_ucl,
				G_STRUCT_OFFSET (struct rspamd_config, debug_ip_map),
				0,
				"Enable debugging log for the specified IP addresses");
		rspamd_rcl_add_default_handler (sub,
				"debug_symbols",
				rspamd_rcl_parse_struct_string_list,
				G_STRUCT_OFFSET (struct rspamd_config, debug_symbols),
				0,
				"Enable debug for the specified symbols");
		rspamd_rcl_add_default_handler (sub,
				"debug_modules",
				rspamd_rcl_parse_struct_string_list,
				G_STRUCT_OFFSET (struct rspamd_config, debug_modules),
				RSPAMD_CL_FLAG_STRING_LIST_HASH,
				"Enable debugging for the specified modules");
		rspamd_rcl_add_default_handler (sub,
				"log_format",
				rspamd_rcl_parse_struct_string,
				G_STRUCT_OFFSET (struct rspamd_config, log_format_str),
				0,
				"Specify format string for the task logging output "
				"(https://rspamd.com/doc/configuration/logging.html "
				"for details)");
		rspamd_rcl_add_default_handler (sub,
				"encryption_key",
				rspamd_rcl_parse_struct_pubkey,
				G_STRUCT_OFFSET (struct rspamd_config, log_encryption_key),
				0,
				"Encrypt sensitive information in logs using this pubkey");
		rspamd_rcl_add_default_handler (sub,
				"error_elts",
				rspamd_rcl_parse_struct_integer,
				G_STRUCT_OFFSET (struct rspamd_config, log_error_elts),
				RSPAMD_CL_FLAG_UINT,
				"Size of circular buffer for last errors (10 by default)");
		rspamd_rcl_add_default_handler (sub,
				"error_maxlen",
				rspamd_rcl_parse_struct_integer,
				G_STRUCT_OFFSET (struct rspamd_config, log_error_elt_maxlen),
				RSPAMD_CL_FLAG_UINT,
				"Size of each element in error log buffer (1000 by default)");

		/* Documentation only options, handled in log_handler to map flags */
		rspamd_rcl_add_doc_by_path (cfg,
				"logging",
				"Enable colored output (for console logging)",
				"log_color",
				UCL_BOOLEAN,
				NULL,
				0,
				NULL,
				0);
		rspamd_rcl_add_doc_by_path (cfg,
				"logging",
				"Enable systemd compatible logging",
				"systemd",
				UCL_BOOLEAN,
				NULL,
				0,
				NULL,
				0);
		rspamd_rcl_add_doc_by_path (cfg,
				"logging",
				"Write statistics of regexp processing to log (useful for hyperscan)",
				"log_re_cache",
				UCL_BOOLEAN,
				NULL,
				0,
				NULL,
				0);
		rspamd_rcl_add_doc_by_path (cfg,
				"logging",
				"Use microseconds resolution for timestamps",
				"log_usec",
				UCL_BOOLEAN,
				NULL,
				0,
				NULL,
				0);
	}
	if (!(skip_sections && g_hash_table_lookup (skip_sections, "options"))) {
		/**
		 * Options section
		 */
		sub = rspamd_rcl_add_section_doc (&new,
				"options", NULL,
				rspamd_rcl_options_handler,
				UCL_OBJECT,
				FALSE,
				TRUE,
				cfg->doc_strings,
				"Global rspamd options");
		rspamd_rcl_add_default_handler (sub,
				"cache_file",
				rspamd_rcl_parse_struct_string,
				G_STRUCT_OFFSET (struct rspamd_config, cache_filename),
				RSPAMD_CL_FLAG_STRING_PATH,
				"Path to the cache file");
		rspamd_rcl_add_default_handler (sub,
				"cache_reload",
				rspamd_rcl_parse_struct_time,
				G_STRUCT_OFFSET (struct rspamd_config, cache_reload_time),
				RSPAMD_CL_FLAG_TIME_FLOAT,
				"How often cache reload should be performed");
		/* Old DNS configuration */
		rspamd_rcl_add_default_handler (sub,
				"dns_nameserver",
				rspamd_rcl_parse_struct_ucl,
				G_STRUCT_OFFSET (struct rspamd_config, nameservers),
				0,
				"Legacy option for DNS servers used");
		rspamd_rcl_add_default_handler (sub,
				"dns_timeout",
				rspamd_rcl_parse_struct_time,
				G_STRUCT_OFFSET (struct rspamd_config, dns_timeout),
				RSPAMD_CL_FLAG_TIME_FLOAT,
				"Legacy option for DNS request timeout");
		rspamd_rcl_add_default_handler (sub,
				"dns_retransmits",
				rspamd_rcl_parse_struct_integer,
				G_STRUCT_OFFSET (struct rspamd_config, dns_retransmits),
				RSPAMD_CL_FLAG_INT_32,
				"Legacy option for DNS retransmits count");
		rspamd_rcl_add_default_handler (sub,
				"dns_sockets",
				rspamd_rcl_parse_struct_integer,
				G_STRUCT_OFFSET (struct rspamd_config, dns_io_per_server),
				RSPAMD_CL_FLAG_INT_32,
				"Legacy option for DNS sockets per server count");
		rspamd_rcl_add_default_handler (sub,
				"dns_max_requests",
				rspamd_rcl_parse_struct_integer,
				G_STRUCT_OFFSET (struct rspamd_config, dns_max_requests),
				RSPAMD_CL_FLAG_INT_32,
				"Legacy option for DNS maximum requests per task count");
		rspamd_rcl_add_default_handler (sub,
				"classify_headers",
				rspamd_rcl_parse_struct_string_list,
				G_STRUCT_OFFSET (struct rspamd_config, classify_headers),
				0,
				"List of headers used for classifiers");
		rspamd_rcl_add_default_handler (sub,
				"control_socket",
				rspamd_rcl_parse_struct_string,
				G_STRUCT_OFFSET (struct rspamd_config, control_socket_path),
				0,
				"Path to the control socket");
		rspamd_rcl_add_default_handler (sub,
				"explicit_modules",
				rspamd_rcl_parse_struct_string_list,
				G_STRUCT_OFFSET (struct rspamd_config, explicit_modules),
				RSPAMD_CL_FLAG_STRING_LIST_HASH,
				"Always load these modules even if they are not configured explicitly");
		rspamd_rcl_add_default_handler (sub,
				"allow_raw_input",
				rspamd_rcl_parse_struct_boolean,
				G_STRUCT_OFFSET (struct rspamd_config, allow_raw_input),
				0,
				"Allow non MIME input for rspamd");
		rspamd_rcl_add_default_handler (sub,
				"raw_mode",
				rspamd_rcl_parse_struct_boolean,
				G_STRUCT_OFFSET (struct rspamd_config, raw_mode),
				0,
				"Don't try to convert all messages to utf8");
		rspamd_rcl_add_default_handler (sub,
				"one_shot",
				rspamd_rcl_parse_struct_boolean,
				G_STRUCT_OFFSET (struct rspamd_config, one_shot_mode),
				0,
				"Add all symbols only once per message");
		rspamd_rcl_add_default_handler (sub,
				"check_attachements",
				rspamd_rcl_parse_struct_boolean,
				G_STRUCT_OFFSET (struct rspamd_config, check_text_attachements),
				0,
				"Treat text attachments as normal text parts");
		rspamd_rcl_add_default_handler (sub,
				"check_attachments",
				rspamd_rcl_parse_struct_boolean,
				G_STRUCT_OFFSET (struct rspamd_config, check_text_attachements),
				0,
				"Treat text attachments as normal text parts");
		rspamd_rcl_add_default_handler (sub,
				"tempdir",
				rspamd_rcl_parse_struct_string,
				G_STRUCT_OFFSET (struct rspamd_config, temp_dir),
				RSPAMD_CL_FLAG_STRING_PATH,
				"Directory for temporary files");
		rspamd_rcl_add_default_handler (sub,
				"pidfile",
				rspamd_rcl_parse_struct_string,
				G_STRUCT_OFFSET (struct rspamd_config, pid_file),
				RSPAMD_CL_FLAG_STRING_PATH,
				"Path to the pid file");
		rspamd_rcl_add_default_handler (sub,
				"filters",
				rspamd_rcl_parse_struct_string_list,
				G_STRUCT_OFFSET (struct rspamd_config, filters),
				0,
				"List of internal filters enabled");
		rspamd_rcl_add_default_handler (sub,
				"max_diff",
				rspamd_rcl_parse_struct_integer,
				G_STRUCT_OFFSET (struct rspamd_config, max_diff),
				RSPAMD_CL_FLAG_INT_SIZE,
				"Legacy option, do not use");
		rspamd_rcl_add_default_handler (sub,
				"map_watch_interval",
				rspamd_rcl_parse_struct_time,
				G_STRUCT_OFFSET (struct rspamd_config, map_timeout),
				RSPAMD_CL_FLAG_TIME_FLOAT,
				"Interval for checking maps");
		rspamd_rcl_add_default_handler (sub,
				"map_file_watch_multiplier",
				rspamd_rcl_parse_struct_double,
				G_STRUCT_OFFSET (struct rspamd_config, map_file_watch_multiplier),
				0,
				"Multiplier for map watch interval when map is file");
		rspamd_rcl_add_default_handler (sub,
				"maps_cache_dir",
				rspamd_rcl_parse_struct_string,
				G_STRUCT_OFFSET (struct rspamd_config, maps_cache_dir),
				0,
				"Directory to save maps cached data (default: $DBDIR)");
		rspamd_rcl_add_default_handler (sub,
				"monitoring_watch_interval",
				rspamd_rcl_parse_struct_time,
				G_STRUCT_OFFSET (struct rspamd_config, monitored_interval),
				RSPAMD_CL_FLAG_TIME_FLOAT,
				"Interval for checking monitored instances");
		rspamd_rcl_add_default_handler (sub,
				"disable_monitoring",
				rspamd_rcl_parse_struct_boolean,
				G_STRUCT_OFFSET (struct rspamd_config, disable_monitored),
				0,
				"Disable monitoring completely");
		rspamd_rcl_add_default_handler (sub,
				"dynamic_conf",
				rspamd_rcl_parse_struct_string,
				G_STRUCT_OFFSET (struct rspamd_config, dynamic_conf),
				0,
				"Path to the dynamic configuration");
		rspamd_rcl_add_default_handler (sub,
				"rrd",
				rspamd_rcl_parse_struct_string,
				G_STRUCT_OFFSET (struct rspamd_config, rrd_file),
				RSPAMD_CL_FLAG_STRING_PATH,
				"Path to RRD file");
		rspamd_rcl_add_default_handler (sub,
				"history_file",
				rspamd_rcl_parse_struct_string,
				G_STRUCT_OFFSET (struct rspamd_config, history_file),
				RSPAMD_CL_FLAG_STRING_PATH,
				"Path to history file");
		rspamd_rcl_add_default_handler (sub,
				"check_all_filters",
				rspamd_rcl_parse_struct_boolean,
				G_STRUCT_OFFSET (struct rspamd_config, check_all_filters),
				0,
				"Always check all filters");
		rspamd_rcl_add_default_handler (sub,
				"enable_experimental",
				rspamd_rcl_parse_struct_boolean,
				G_STRUCT_OFFSET (struct rspamd_config, enable_experimental),
				0,
				"Enable experimental plugins");
		rspamd_rcl_add_default_handler (sub,
				"disable_pcre_jit",
				rspamd_rcl_parse_struct_boolean,
				G_STRUCT_OFFSET (struct rspamd_config, disable_pcre_jit),
				0,
				"Disable PCRE JIT");
		rspamd_rcl_add_default_handler (sub,
				"disable_lua_squeeze",
				rspamd_rcl_parse_struct_boolean,
				G_STRUCT_OFFSET (struct rspamd_config, disable_lua_squeeze),
				0,
				"Disable Lua rules squeezing");
		rspamd_rcl_add_default_handler (sub,
				"min_word_len",
				rspamd_rcl_parse_struct_integer,
				G_STRUCT_OFFSET (struct rspamd_config, min_word_len),
				RSPAMD_CL_FLAG_UINT,
				"Minimum length of the word to be considered in statistics/fuzzy");
		rspamd_rcl_add_default_handler (sub,
				"max_word_len",
				rspamd_rcl_parse_struct_integer,
				G_STRUCT_OFFSET (struct rspamd_config, max_word_len),
				RSPAMD_CL_FLAG_UINT,
				"Maximum length of the word to be considered in statistics/fuzzy");
		rspamd_rcl_add_default_handler (sub,
				"words_decay",
				rspamd_rcl_parse_struct_integer,
				G_STRUCT_OFFSET (struct rspamd_config, words_decay),
				RSPAMD_CL_FLAG_UINT,
				"Start skipping words at this amount");
		rspamd_rcl_add_default_handler (sub,
				"url_tld",
				rspamd_rcl_parse_struct_string,
				G_STRUCT_OFFSET (struct rspamd_config, tld_file),
				RSPAMD_CL_FLAG_STRING_PATH,
				"Path to the TLD file for urls detector");
		rspamd_rcl_add_default_handler (sub,
				"tld",
				rspamd_rcl_parse_struct_string,
				G_STRUCT_OFFSET (struct rspamd_config, tld_file),
				RSPAMD_CL_FLAG_STRING_PATH,
				"Path to the TLD file for urls detector");
		rspamd_rcl_add_default_handler (sub,
				"hs_cache_dir",
				rspamd_rcl_parse_struct_string,
				G_STRUCT_OFFSET (struct rspamd_config, hs_cache_dir),
				RSPAMD_CL_FLAG_STRING_PATH,
				"Path directory where rspamd would save hyperscan cache");
		rspamd_rcl_add_default_handler (sub,
				"history_rows",
				rspamd_rcl_parse_struct_integer,
				G_STRUCT_OFFSET (struct rspamd_config, history_rows),
				RSPAMD_CL_FLAG_UINT,
				"Number of records in the history file");
		rspamd_rcl_add_default_handler (sub,
				"disable_hyperscan",
				rspamd_rcl_parse_struct_boolean,
				G_STRUCT_OFFSET (struct rspamd_config, disable_hyperscan),
				0,
				"Disable hyperscan optimizations for regular expressions");
		rspamd_rcl_add_default_handler (sub,
				"vectorized_hyperscan",
				rspamd_rcl_parse_struct_boolean,
				G_STRUCT_OFFSET (struct rspamd_config, vectorized_hyperscan),
				0,
				"Use hyperscan in vectorized mode (experimental)");
		rspamd_rcl_add_default_handler (sub,
				"cores_dir",
				rspamd_rcl_parse_struct_string,
				G_STRUCT_OFFSET (struct rspamd_config, cores_dir),
				RSPAMD_CL_FLAG_STRING_PATH,
				"Path to the directory where rspamd core files are intended to be dumped");
		rspamd_rcl_add_default_handler (sub,
				"max_cores_size",
				rspamd_rcl_parse_struct_integer,
				G_STRUCT_OFFSET (struct rspamd_config, max_cores_size),
				RSPAMD_CL_FLAG_INT_SIZE,
				"Limit of joint size of all files in `cores_dir`");
		rspamd_rcl_add_default_handler (sub,
				"max_cores_count",
				rspamd_rcl_parse_struct_integer,
				G_STRUCT_OFFSET (struct rspamd_config, max_cores_count),
				RSPAMD_CL_FLAG_INT_SIZE,
				"Limit of files count in `cores_dir`");
		rspamd_rcl_add_default_handler (sub,
				"local_addrs",
				rspamd_rcl_parse_struct_ucl,
				G_STRUCT_OFFSET (struct rspamd_config, local_addrs),
				0,
				"Use the specified addresses as local ones");
		rspamd_rcl_add_default_handler (sub,
				"local_networks",
				rspamd_rcl_parse_struct_ucl,
				G_STRUCT_OFFSET (struct rspamd_config, local_addrs),
				0,
				"Use the specified addresses as local ones (alias for `local_addrs`)");
		rspamd_rcl_add_default_handler (sub,
				"trusted_keys",
				rspamd_rcl_parse_struct_string_list,
				G_STRUCT_OFFSET (struct rspamd_config, trusted_keys),
				RSPAMD_CL_FLAG_STRING_LIST_HASH,
				"List of trusted public keys used for signatures in base32 encoding");
		rspamd_rcl_add_default_handler (sub,
				"enable_shutdown_workaround",
				rspamd_rcl_parse_struct_boolean,
				G_STRUCT_OFFSET (struct rspamd_config, enable_shutdown_workaround),
				0,
				"Enable workaround for legacy clients");
		rspamd_rcl_add_default_handler (sub,
				"ignore_received",
				rspamd_rcl_parse_struct_boolean,
				G_STRUCT_OFFSET (struct rspamd_config, ignore_received),
				0,
				"Ignore data from the first received header");
		rspamd_rcl_add_default_handler (sub,
				"ssl_ca_path",
				rspamd_rcl_parse_struct_string,
				G_STRUCT_OFFSET (struct rspamd_config, ssl_ca_path),
				RSPAMD_CL_FLAG_STRING_PATH,
				"Path to ssl CA file");
		rspamd_rcl_add_default_handler (sub,
				"ssl_ciphers",
				rspamd_rcl_parse_struct_string,
				G_STRUCT_OFFSET (struct rspamd_config, ssl_ciphers),
				0,
				"List of ssl ciphers (e.g. HIGH:!aNULL:!kRSA:!PSK:!SRP:!MD5:!RC4)");
		rspamd_rcl_add_default_handler (sub,
				"magic_file",
				rspamd_rcl_parse_struct_string,
				G_STRUCT_OFFSET (struct rspamd_config, magic_file),
				0,
				"Path to a custom libmagic file");
		rspamd_rcl_add_default_handler (sub,
				"max_message",
				rspamd_rcl_parse_struct_integer,
				G_STRUCT_OFFSET (struct rspamd_config, max_message),
				RSPAMD_CL_FLAG_INT_SIZE,
				"Maximum size of the message to be scanned (50Mb by default)");
		rspamd_rcl_add_default_handler (sub,
				"max_pic",
				rspamd_rcl_parse_struct_integer,
				G_STRUCT_OFFSET (struct rspamd_config, max_pic_size),
				RSPAMD_CL_FLAG_INT_SIZE,
				"Maximum size of the picture to be normalized (1Mb by default)");
		rspamd_rcl_add_default_handler (sub,
				"images_cache",
				rspamd_rcl_parse_struct_integer,
				G_STRUCT_OFFSET (struct rspamd_config, max_pic_size),
				RSPAMD_CL_FLAG_INT_SIZE,
				"Size of DCT data cache for images (256 elements by default)");
		rspamd_rcl_add_default_handler (sub,
				"zstd_input_dictionary",
				rspamd_rcl_parse_struct_string,
				G_STRUCT_OFFSET (struct rspamd_config, zstd_input_dictionary),
				RSPAMD_CL_FLAG_STRING_PATH,
				"Dictionary for zstd inbound protocol compression");
		rspamd_rcl_add_default_handler (sub,
				"zstd_output_dictionary",
				rspamd_rcl_parse_struct_string,
				G_STRUCT_OFFSET (struct rspamd_config, zstd_output_dictionary),
				RSPAMD_CL_FLAG_STRING_PATH,
				"Dictionary for outbound zstd compression");
		rspamd_rcl_add_default_handler (sub,
				"compat_messages",
				rspamd_rcl_parse_struct_boolean,
				G_STRUCT_OFFSET (struct rspamd_config, compat_messages),
				0,
				"Use pre 1.4 style of messages in the protocol");
		rspamd_rcl_add_default_handler (sub,
				"max_shots",
				rspamd_rcl_parse_struct_integer,
				G_STRUCT_OFFSET (struct rspamd_config, default_max_shots),
				0,
				"Maximum number of hits per a single symbol (default: 100)");
		rspamd_rcl_add_default_handler (sub,
				"sessions_cache",
				rspamd_rcl_parse_struct_boolean,
				G_STRUCT_OFFSET (struct rspamd_config, enable_sessions_cache),
				0,
				"Enable sessions cache to debug dangling sessions");
		rspamd_rcl_add_default_handler (sub,
				"max_sessions_cache",
				rspamd_rcl_parse_struct_integer,
				G_STRUCT_OFFSET (struct rspamd_config, max_sessions_cache),
				0,
				"Maximum number of sessions in cache before warning (default: 100)");

		/* Neighbours configuration */
		rspamd_rcl_add_section_doc (&sub->subsections, "neighbours", "name",
				rspamd_rcl_neighbours_handler,
				UCL_OBJECT, FALSE, TRUE,
				cfg->doc_strings,
				"List of members of Rspamd cluster");

		/* New DNS configuration */
		ssub = rspamd_rcl_add_section_doc (&sub->subsections, "dns", NULL, NULL,
				UCL_OBJECT, FALSE, TRUE,
				cfg->doc_strings,
				"Options for DNS resolver");
		rspamd_rcl_add_default_handler (ssub,
				"nameserver",
				rspamd_rcl_parse_struct_ucl,
				G_STRUCT_OFFSET (struct rspamd_config, nameservers),
				0,
				"List of DNS servers");
		rspamd_rcl_add_default_handler (ssub,
				"server",
				rspamd_rcl_parse_struct_ucl,
				G_STRUCT_OFFSET (struct rspamd_config, nameservers),
				0,
				"List of DNS servers");
		rspamd_rcl_add_default_handler (ssub,
				"timeout",
				rspamd_rcl_parse_struct_time,
				G_STRUCT_OFFSET (struct rspamd_config, dns_timeout),
				RSPAMD_CL_FLAG_TIME_FLOAT,
				"DNS request timeout");
		rspamd_rcl_add_default_handler (ssub,
				"retransmits",
				rspamd_rcl_parse_struct_integer,
				G_STRUCT_OFFSET (struct rspamd_config, dns_retransmits),
				RSPAMD_CL_FLAG_INT_32,
				"DNS request retransmits");
		rspamd_rcl_add_default_handler (ssub,
				"sockets",
				rspamd_rcl_parse_struct_integer,
				G_STRUCT_OFFSET (struct rspamd_config, dns_io_per_server),
				RSPAMD_CL_FLAG_INT_32,
				"Number of sockets per DNS server");
		rspamd_rcl_add_default_handler (ssub,
				"connections",
				rspamd_rcl_parse_struct_integer,
				G_STRUCT_OFFSET (struct rspamd_config, dns_io_per_server),
				RSPAMD_CL_FLAG_INT_32,
				"Number of sockets per DNS server");
		rspamd_rcl_add_default_handler (ssub,
				"enable_dnssec",
				rspamd_rcl_parse_struct_boolean,
				G_STRUCT_OFFSET (struct rspamd_config, enable_dnssec),
				0,
				"Enable DNSSEC support in Rspamd");


		/* New upstreams configuration */
		ssub = rspamd_rcl_add_section_doc (&sub->subsections, "upstream", NULL, NULL,
				UCL_OBJECT, FALSE, TRUE,
				cfg->doc_strings,
				"Upstreams configuration parameters");
		rspamd_rcl_add_default_handler (ssub,
				"max_errors",
				rspamd_rcl_parse_struct_integer,
				G_STRUCT_OFFSET (struct rspamd_config, upstream_max_errors),
				RSPAMD_CL_FLAG_UINT,
				"Maximum number of errors during `error_time` to consider upstream down");
		rspamd_rcl_add_default_handler (ssub,
				"error_time",
				rspamd_rcl_parse_struct_time,
				G_STRUCT_OFFSET (struct rspamd_config, upstream_error_time),
				RSPAMD_CL_FLAG_TIME_FLOAT,
				"Time frame to check errors");
		rspamd_rcl_add_default_handler (ssub,
				"revive_time",
				rspamd_rcl_parse_struct_time,
				G_STRUCT_OFFSET (struct rspamd_config, upstream_revive_time),
				RSPAMD_CL_FLAG_TIME_FLOAT,
				"Time before attempting to recover upstream after an error");
	}

	if (!(skip_sections && g_hash_table_lookup (skip_sections, "actions"))) {
		/**
		 * Symbols and actions sections
		 */
		sub = rspamd_rcl_add_section_doc (&new,
				"actions", NULL,
				rspamd_rcl_actions_handler,
				UCL_OBJECT,
				FALSE,
				TRUE,
				cfg->doc_strings,
				"Actions configuration");
		rspamd_rcl_add_default_handler (sub,
				"unknown_weight",
				rspamd_rcl_parse_struct_double,
				G_STRUCT_OFFSET (struct rspamd_config, unknown_weight),
				0,
				"Accept unknown symbols with the specified weight");
		rspamd_rcl_add_default_handler (sub,
				"grow_factor",
				rspamd_rcl_parse_struct_double,
				G_STRUCT_OFFSET (struct rspamd_config, grow_factor),
				0,
				"Multiply the subsequent symbols by this number "
				"(does not affect symbols with score less or "
				"equal to zero)");
		rspamd_rcl_add_default_handler (sub,
				"subject",
				rspamd_rcl_parse_struct_string,
				G_STRUCT_OFFSET (struct rspamd_config, subject),
				0,
				"Rewrite subject with this value");
	}

	if (!(skip_sections && g_hash_table_lookup (skip_sections, "group"))) {
		sub = rspamd_rcl_add_section_doc (&new,
				"group", "name",
				rspamd_rcl_group_handler,
				UCL_OBJECT,
				FALSE,
				TRUE,
				cfg->doc_strings,
				"Symbol groups configuration");
		ssub = rspamd_rcl_add_section_doc (&sub->subsections, "symbols", "name",
				rspamd_rcl_symbol_handler,
				UCL_OBJECT, FALSE, TRUE,
				cfg->doc_strings,
				"Symbols configuration");

		/* Group part */
		rspamd_rcl_add_default_handler (sub,
				"disabled",
				rspamd_rcl_parse_struct_boolean,
				G_STRUCT_OFFSET (struct rspamd_symbols_group, disabled),
				0,
				"Disable symbols group");
		rspamd_rcl_add_default_handler (sub,
				"enabled",
				rspamd_rcl_parse_struct_boolean,
				G_STRUCT_OFFSET (struct rspamd_symbols_group, disabled),
				RSPAMD_CL_FLAG_BOOLEAN_INVERSE,
				"Enable or disable symbols group");
		rspamd_rcl_add_default_handler (sub,
				"max_score",
				rspamd_rcl_parse_struct_double,
				G_STRUCT_OFFSET (struct rspamd_symbols_group, max_score),
				0,
				"Maximum score that could be reached by this symbols group");
	}

	if (!(skip_sections && g_hash_table_lookup (skip_sections, "worker"))) {
		/**
		 * Worker section
		 */
		sub = rspamd_rcl_add_section_doc (&new,
				"worker", "type",
				rspamd_rcl_worker_handler,
				UCL_OBJECT,
				FALSE,
				TRUE,
				cfg->doc_strings,
				"Workers common options");
		rspamd_rcl_add_default_handler (sub,
				"count",
				rspamd_rcl_parse_struct_integer,
				G_STRUCT_OFFSET (struct rspamd_worker_conf, count),
				RSPAMD_CL_FLAG_INT_16,
				"Number of workers to spawn");
		rspamd_rcl_add_default_handler (sub,
				"max_files",
				rspamd_rcl_parse_struct_integer,
				G_STRUCT_OFFSET (struct rspamd_worker_conf, rlimit_nofile),
				RSPAMD_CL_FLAG_INT_32,
				"Maximum number of opened files per worker");
		rspamd_rcl_add_default_handler (sub,
				"max_core",
				rspamd_rcl_parse_struct_integer,
				G_STRUCT_OFFSET (struct rspamd_worker_conf, rlimit_maxcore),
				RSPAMD_CL_FLAG_INT_32,
				"Max size of core file in bytes");
		rspamd_rcl_add_default_handler (sub,
				"enabled",
				rspamd_rcl_parse_struct_boolean,
				G_STRUCT_OFFSET (struct rspamd_worker_conf, enabled),
				0,
				"Enable or disable a worker (true by default)");
	}

	if (!(skip_sections && g_hash_table_lookup (skip_sections, "modules"))) {
		/**
		 * Modules handler
		 */
		sub = rspamd_rcl_add_section_doc (&new,
				"modules", NULL,
				rspamd_rcl_modules_handler,
				UCL_OBJECT,
				FALSE,
				FALSE,
				cfg->doc_strings,
				"Lua plugins to load");
	}

	if (!(skip_sections && g_hash_table_lookup (skip_sections, "classifier"))) {
		/**
		 * Classifiers handler
		 */
		sub = rspamd_rcl_add_section_doc (&new,
				"classifier", "type",
				rspamd_rcl_classifier_handler,
				UCL_OBJECT,
				FALSE,
				TRUE,
				cfg->doc_strings,
				"CLassifier options");
		/* Default classifier is 'bayes' for now */
		sub->default_key = "bayes";

		rspamd_rcl_add_default_handler (sub,
				"min_tokens",
				rspamd_rcl_parse_struct_integer,
				G_STRUCT_OFFSET (struct rspamd_classifier_config, min_tokens),
				RSPAMD_CL_FLAG_INT_32,
				"Minimum count of tokens (words) to be considered for statistics");
		rspamd_rcl_add_default_handler (sub,
				"min_token_hits",
				rspamd_rcl_parse_struct_integer,
				G_STRUCT_OFFSET (struct rspamd_classifier_config, min_token_hits),
				RSPAMD_CL_FLAG_UINT,
				"Minimum number of hits for a token to be considered");
		rspamd_rcl_add_default_handler (sub,
				"min_prob_strength",
				rspamd_rcl_parse_struct_double,
				G_STRUCT_OFFSET (struct rspamd_classifier_config, min_token_hits),
				0,
				"Use only tokens with probability in [0.5 - MPS, 0.5 + MPS]");
		rspamd_rcl_add_default_handler (sub,
				"max_tokens",
				rspamd_rcl_parse_struct_integer,
				G_STRUCT_OFFSET (struct rspamd_classifier_config, max_tokens),
				RSPAMD_CL_FLAG_INT_32,
				"Maximum count of tokens (words) to be considered for statistics");
		rspamd_rcl_add_default_handler (sub,
				"min_learns",
				rspamd_rcl_parse_struct_integer,
				G_STRUCT_OFFSET (struct rspamd_classifier_config, min_learns),
				RSPAMD_CL_FLAG_UINT,
				"Minimum number of learns for each statfile to use this classifier");
		rspamd_rcl_add_default_handler (sub,
				"backend",
				rspamd_rcl_parse_struct_string,
				G_STRUCT_OFFSET (struct rspamd_classifier_config, backend),
				0,
				"Statfiles engine");
		rspamd_rcl_add_default_handler (sub,
				"name",
				rspamd_rcl_parse_struct_string,
				G_STRUCT_OFFSET (struct rspamd_classifier_config, name),
				0,
				"Name of classifier");

		/*
		 * Statfile defaults
		 */
		ssub = rspamd_rcl_add_section_doc (&sub->subsections,
				"statfile", "symbol",
				rspamd_rcl_statfile_handler,
				UCL_OBJECT,
				TRUE,
				TRUE,
				sub->doc_ref,
				"Statfiles options");
		rspamd_rcl_add_default_handler (ssub,
				"label",
				rspamd_rcl_parse_struct_string,
				G_STRUCT_OFFSET (struct rspamd_statfile_config, label),
				0,
				"Statfile unique label");
		rspamd_rcl_add_default_handler (ssub,
				"spam",
				rspamd_rcl_parse_struct_boolean,
				G_STRUCT_OFFSET (struct rspamd_statfile_config, is_spam),
				0,
				"Sets if this statfile contains spam samples");
	}

	if (!(skip_sections && g_hash_table_lookup (skip_sections, "composite"))) {
		/**
		 * Composites handlers
		 */
		sub = rspamd_rcl_add_section_doc (&new,
				"composite", "name",
				rspamd_rcl_composite_handler,
				UCL_OBJECT,
				FALSE,
				TRUE,
				cfg->doc_strings,
				"Rspamd composite symbols");
		sub = rspamd_rcl_add_section_doc (&new,
				"composites", NULL,
				rspamd_rcl_composites_handler,
				UCL_OBJECT,
				FALSE,
				TRUE,
				cfg->doc_strings,
				"Rspamd composite symbols");
	}

	if (!(skip_sections && g_hash_table_lookup (skip_sections, "lua"))) {
		/**
		 * Lua handler
		 */
		sub = rspamd_rcl_add_section_doc (&new,
				"lua", NULL,
				rspamd_rcl_lua_handler,
				UCL_STRING,
				FALSE,
				TRUE,
				cfg->doc_strings,
				"Lua files to load");
	}

	return new;
}

struct rspamd_rcl_section *
rspamd_rcl_config_get_section (struct rspamd_rcl_section *top,
	const char *path)
{
	struct rspamd_rcl_section *cur, *found = NULL;
	char **path_components;
	gint ncomponents, i;


	if (path == NULL) {
		return top;
	}

	path_components = g_strsplit_set (path, "/", -1);
	ncomponents = g_strv_length (path_components);

	cur = top;
	for (i = 0; i < ncomponents; i++) {
		if (cur == NULL) {
			g_strfreev (path_components);
			return NULL;
		}
		HASH_FIND_STR (cur, path_components[i], found);
		if (found == NULL) {
			g_strfreev (path_components);
			return NULL;
		}
		cur = found;
	}

	g_strfreev (path_components);
	return found;
}

static gboolean
rspamd_rcl_process_section (struct rspamd_config *cfg,
		struct rspamd_rcl_section *sec,
		gpointer ptr, const ucl_object_t *obj, rspamd_mempool_t *pool,
		GError **err)
{
	ucl_object_iter_t it;
	const ucl_object_t *cur;
	gboolean is_nested = TRUE;
	const gchar *key = NULL;

	g_assert (obj != NULL);
	g_assert (sec->handler != NULL);

	if (sec->key_attr != NULL) {
		it = ucl_object_iterate_new (obj);

		while ((cur = ucl_object_iterate_full (it, UCL_ITERATE_EXPLICIT)) != NULL) {
			if (ucl_object_type (cur) != UCL_OBJECT) {
				is_nested = FALSE;
				break;
			}
		}

		ucl_object_iterate_free (it);
	}
	else {
		is_nested = FALSE;
	}

	if (is_nested) {
		/* Just reiterate on all subobjects */
		it = ucl_object_iterate_new (obj);

		while ((cur = ucl_object_iterate_full (it, UCL_ITERATE_EXPLICIT)) != NULL) {
			if (!sec->handler (pool, cur, ucl_object_key (cur), ptr, sec, err)) {
				ucl_object_iterate_free (it);

				return FALSE;
			}
		}

		ucl_object_iterate_free (it);

		return TRUE;
	}
	else {
		if (sec->key_attr != NULL) {
			/* First of all search for required attribute and use it as a key */
			cur = ucl_object_lookup (obj, sec->key_attr);

			if (cur == NULL) {
				if (sec->default_key == NULL) {
					g_set_error (err, CFG_RCL_ERROR, EINVAL, "required attribute "
							"'%s' is missing for section '%s', current key: %s",
							sec->key_attr,
							sec->name,
							ucl_object_emit (obj, UCL_EMIT_CONFIG));

					return FALSE;
				}
				else {
					msg_info ("using default key '%s' for mandatory field '%s' "
							"for section '%s'", sec->default_key, sec->key_attr,
							sec->name);
					key = sec->default_key;
				}
			}
			else if (ucl_object_type (cur) != UCL_STRING) {
				g_set_error (err, CFG_RCL_ERROR, EINVAL, "required attribute %s"
						" is not a string for section %s",
						sec->key_attr, sec->name);

				return FALSE;
			}
			else {
				key = ucl_object_tostring (cur);
			}
		}
	}

	return sec->handler (pool, obj, key, ptr, sec, err);
}

gboolean
rspamd_rcl_parse (struct rspamd_rcl_section *top,
		struct rspamd_config *cfg,
		gpointer ptr, rspamd_mempool_t *pool,
		const ucl_object_t *obj, GError **err)
{
	const ucl_object_t *found, *cur_obj;
	struct rspamd_rcl_section *cur, *tmp, *found_sec;

	if (obj->type != UCL_OBJECT) {
		g_set_error (err,
			CFG_RCL_ERROR,
			EINVAL,
			"top configuration must be an object");
		return FALSE;
	}

	/* Iterate over known sections and ignore unknown ones */
	HASH_ITER (hh, top, cur, tmp)
	{
		if (strcmp (cur->name, "*") == 0) {
			/* Default section handler */
			LL_FOREACH (obj, cur_obj) {
				HASH_FIND_STR (top, ucl_object_key (cur_obj), found_sec);

				if (found_sec == NULL) {
					if (cur->handler != NULL) {
						if (!rspamd_rcl_process_section (cfg, cur, ptr, cur_obj,
								pool, err)) {
							return FALSE;
						}
					}
					else {
						rspamd_rcl_section_parse_defaults (cfg,
								cur,
								pool,
								cur_obj,
								ptr,
								err);
					}
				}
			}
		}
		else {
			found = ucl_object_lookup (obj, cur->name);
			if (found == NULL) {
				if (cur->required) {
					g_set_error (err, CFG_RCL_ERROR, ENOENT,
							"required section %s is missing", cur->name);
					return FALSE;
				}
			}
			else {
				/* Check type */
				if (cur->strict_type) {
					if (cur->type != found->type) {
						g_set_error (err, CFG_RCL_ERROR, EINVAL,
								"object in section %s has invalid type", cur->name);
						return FALSE;
					}
				}

				LL_FOREACH (found, cur_obj) {
					if (cur->handler != NULL) {
						if (!rspamd_rcl_process_section (cfg, cur, ptr, cur_obj,
								pool, err)) {
							return FALSE;
						}
					}
					else {
						rspamd_rcl_section_parse_defaults (cfg, cur,
								pool,
								cur_obj,
								ptr,
								err);
					}
				}
			}
		}
		if (cur->fin) {
			cur->fin (pool, cur->fin_ud);
		}
	}

	return TRUE;
}

gboolean
rspamd_rcl_section_parse_defaults (struct rspamd_config *cfg,
		struct rspamd_rcl_section *section,
		rspamd_mempool_t *pool, const ucl_object_t *obj, gpointer ptr,
		GError **err)
{
	const ucl_object_t *found, *cur_obj;
	struct rspamd_rcl_default_handler_data *cur, *tmp;

	if (obj->type != UCL_OBJECT) {
		g_set_error (err,
			CFG_RCL_ERROR,
			EINVAL,
			"default configuration must be an object for section %s "
					"(actual type is %s)",
				section->name, ucl_object_type_to_string (obj->type));
		return FALSE;
	}

	HASH_ITER (hh, section->default_parser, cur, tmp)
	{
		found = ucl_object_lookup (obj, cur->key);
		if (found != NULL) {
			cur->pd.user_struct = ptr;
			cur->pd.cfg = cfg;

			LL_FOREACH (found, cur_obj) {
				if (!cur->handler (pool, cur_obj, &cur->pd, section, err)) {
					return FALSE;
				}

				if (!(cur->pd.flags & RSPAMD_CL_FLAG_MULTIPLE)) {
					break;
				}
			}
		}
	}

	return TRUE;
}

gboolean
rspamd_rcl_parse_struct_string (rspamd_mempool_t *pool,
	const ucl_object_t *obj,
	gpointer ud,
	struct rspamd_rcl_section *section,
	GError **err)
{
	struct rspamd_rcl_struct_parser *pd = ud;
	gchar **target;
	const gsize num_str_len = 32;

	target = (gchar **)(((gchar *)pd->user_struct) + pd->offset);
	switch (obj->type) {
	case UCL_STRING:
		*target =
			rspamd_mempool_strdup (pool, ucl_copy_value_trash (obj));
		break;
	case UCL_INT:
		*target = rspamd_mempool_alloc (pool, num_str_len);
		rspamd_snprintf (*target, num_str_len, "%L", obj->value.iv);
		break;
	case UCL_FLOAT:
		*target = rspamd_mempool_alloc (pool, num_str_len);
		rspamd_snprintf (*target, num_str_len, "%f", obj->value.dv);
		break;
	case UCL_BOOLEAN:
		*target = rspamd_mempool_alloc (pool, num_str_len);
		rspamd_snprintf (*target, num_str_len, "%s",
				((gboolean)obj->value.iv) ? "true" : "false");
		break;
	default:
		g_set_error (err,
			CFG_RCL_ERROR,
			EINVAL,
			"cannot convert object or array to string");
		return FALSE;
	}

	return TRUE;
}

gboolean
rspamd_rcl_parse_struct_integer (rspamd_mempool_t *pool,
	const ucl_object_t *obj,
	gpointer ud,
	struct rspamd_rcl_section *section,
	GError **err)
{
	struct rspamd_rcl_struct_parser *pd = ud;
	union {
		gint *ip;
		gint32 *i32p;
		gint16 *i16p;
		gint64 *i64p;
		guint *up;
		gsize *sp;
	} target;
	int64_t val;

	if (pd->flags == RSPAMD_CL_FLAG_INT_32) {
		target.i32p = (gint32 *)(((gchar *)pd->user_struct) + pd->offset);
		if (!ucl_object_toint_safe (obj, &val)) {
			g_set_error (err,
				CFG_RCL_ERROR,
				EINVAL,
				"cannot convert param to integer");
			return FALSE;
		}
		*target.i32p = val;
	}
	else if (pd->flags == RSPAMD_CL_FLAG_INT_64) {
		target.i64p = (gint64 *)(((gchar *)pd->user_struct) + pd->offset);
		if (!ucl_object_toint_safe (obj, &val)) {
			g_set_error (err,
				CFG_RCL_ERROR,
				EINVAL,
				"cannot convert param to integer");
			return FALSE;
		}
		*target.i64p = val;
	}
	else if (pd->flags == RSPAMD_CL_FLAG_INT_SIZE) {
		target.sp = (gsize *)(((gchar *)pd->user_struct) + pd->offset);
		if (!ucl_object_toint_safe (obj, &val)) {
			g_set_error (err,
				CFG_RCL_ERROR,
				EINVAL,
				"cannot convert param to integer");
			return FALSE;
		}
		*target.sp = val;
	}
	else if (pd->flags == RSPAMD_CL_FLAG_INT_16) {
		target.i16p = (gint16 *)(((gchar *)pd->user_struct) + pd->offset);
		if (!ucl_object_toint_safe (obj, &val)) {
			g_set_error (err,
				CFG_RCL_ERROR,
				EINVAL,
				"cannot convert param to integer");
			return FALSE;
		}
		*target.i16p = val;
	}
	else if (pd->flags == RSPAMD_CL_FLAG_UINT) {
		target.up = (guint *)(((gchar *)pd->user_struct) + pd->offset);
		if (!ucl_object_toint_safe (obj, &val)) {
			g_set_error (err,
					CFG_RCL_ERROR,
					EINVAL,
					"cannot convert param to integer");
			return FALSE;
		}
		*target.up = val;
	}
	else {
		target.ip = (gint *)(((gchar *)pd->user_struct) + pd->offset);
		if (!ucl_object_toint_safe (obj, &val)) {
			g_set_error (err,
				CFG_RCL_ERROR,
				EINVAL,
				"cannot convert param to integer");
			return FALSE;
		}
		*target.ip = val;
	}

	return TRUE;
}

gboolean
rspamd_rcl_parse_struct_double (rspamd_mempool_t *pool,
	const ucl_object_t *obj,
	gpointer ud,
	struct rspamd_rcl_section *section,
	GError **err)
{
	struct rspamd_rcl_struct_parser *pd = ud;
	gdouble *target;

	target = (gdouble *)(((gchar *)pd->user_struct) + pd->offset);

	if (!ucl_object_todouble_safe (obj, target)) {
		g_set_error (err,
			CFG_RCL_ERROR,
			EINVAL,
			"cannot convert param %s to double", ucl_object_key (obj));
		return FALSE;
	}

	return TRUE;
}

gboolean
rspamd_rcl_parse_struct_time (rspamd_mempool_t *pool,
	const ucl_object_t *obj,
	gpointer ud,
	struct rspamd_rcl_section *section,
	GError **err)
{
	struct rspamd_rcl_struct_parser *pd = ud;
	union {
		gint *psec;
		guint32 *pu32;
		gdouble *pdv;
		struct timeval *ptv;
		struct timespec *pts;
	} target;
	gdouble val;

	if (!ucl_object_todouble_safe (obj, &val)) {
		g_set_error (err,
			CFG_RCL_ERROR,
			EINVAL,
				"cannot convert param %s to double", ucl_object_key (obj));
		return FALSE;
	}

	if (pd->flags == RSPAMD_CL_FLAG_TIME_TIMEVAL) {
		target.ptv =
			(struct timeval *)(((gchar *)pd->user_struct) + pd->offset);
		target.ptv->tv_sec = (glong)val;
		target.ptv->tv_usec = (val - (glong)val) * 1000000;
	}
	else if (pd->flags == RSPAMD_CL_FLAG_TIME_TIMESPEC) {
		target.pts =
			(struct timespec *)(((gchar *)pd->user_struct) + pd->offset);
		target.pts->tv_sec = (glong)val;
		target.pts->tv_nsec = (val - (glong)val) * 1000000000000LL;
	}
	else if (pd->flags == RSPAMD_CL_FLAG_TIME_FLOAT) {
		target.pdv = (double *)(((gchar *)pd->user_struct) + pd->offset);
		*target.pdv = val;
	}
	else if (pd->flags == RSPAMD_CL_FLAG_TIME_INTEGER) {
		target.psec = (gint *)(((gchar *)pd->user_struct) + pd->offset);
		*target.psec = val * 1000;
	}
	else if (pd->flags == RSPAMD_CL_FLAG_TIME_UINT_32) {
		target.pu32 = (guint32 *)(((gchar *)pd->user_struct) + pd->offset);
		*target.pu32 = val * 1000;
	}
	else {
		g_set_error (err,
			CFG_RCL_ERROR,
			EINVAL,
			"invalid flags to parse time value in %s", ucl_object_key (obj));
		return FALSE;
	}

	return TRUE;
}

gboolean
rspamd_rcl_parse_struct_keypair (rspamd_mempool_t *pool,
	const ucl_object_t *obj,
	gpointer ud,
	struct rspamd_rcl_section *section,
	GError **err)
{
	struct rspamd_rcl_struct_parser *pd = ud;
	struct rspamd_cryptobox_keypair **target, *kp;

	target = (struct rspamd_cryptobox_keypair **)(((gchar *)pd->user_struct) +
			pd->offset);
	if (obj->type == UCL_OBJECT) {
		kp = rspamd_keypair_from_ucl (obj);

		if (kp != NULL) {
			rspamd_mempool_add_destructor (pool,
					(rspamd_mempool_destruct_t)rspamd_keypair_unref, kp);
			*target = kp;
		}
		else {
			g_set_error (err,
					CFG_RCL_ERROR,
					EINVAL,
					"cannot load the keypair specified: %s",
					ucl_object_key (obj));
			return FALSE;
		}
	}
	else {
		g_set_error (err,
				CFG_RCL_ERROR,
				EINVAL,
				"no sane pubkey or privkey found in the keypair: %s",
				ucl_object_key (obj));
		return FALSE;
	}

	return TRUE;
}

gboolean
rspamd_rcl_parse_struct_pubkey (rspamd_mempool_t *pool,
	const ucl_object_t *obj,
	gpointer ud,
	struct rspamd_rcl_section *section,
	GError **err)
{
	struct rspamd_rcl_struct_parser *pd = ud;
	struct rspamd_cryptobox_pubkey **target, *pk;
	gsize len;
	const gchar *str;
	gint keypair_type = RSPAMD_KEYPAIR_KEX,
			keypair_mode = RSPAMD_CRYPTOBOX_MODE_25519;

	if (pd->flags & RSPAMD_CL_FLAG_SIGNKEY) {
		keypair_type = RSPAMD_KEYPAIR_SIGN;
	}
	if (pd->flags & RSPAMD_CL_FLAG_NISTKEY) {
		keypair_mode = RSPAMD_CRYPTOBOX_MODE_NIST;
	}

	target = (struct rspamd_cryptobox_pubkey **)(((gchar *)pd->user_struct) +
			pd->offset);
	if (obj->type == UCL_STRING) {
		str = ucl_object_tolstring (obj, &len);
		pk = rspamd_pubkey_from_base32 (str, len, keypair_type,
				keypair_mode);

		if (pk != NULL) {
			*target = pk;
		}
		else {
			g_set_error (err,
					CFG_RCL_ERROR,
					EINVAL,
					"cannot load the pubkey specified: %s",
					ucl_object_key (obj));
			return FALSE;
		}
	}
	else {
		g_set_error (err,
				CFG_RCL_ERROR,
				EINVAL,
				"no sane pubkey found in the element: %s",
				ucl_object_key (obj));
		return FALSE;
	}

	rspamd_mempool_add_destructor (pool,
			(rspamd_mempool_destruct_t)rspamd_pubkey_unref, pk);

	return TRUE;
}

static void
rspamd_rcl_insert_string_list_item (gpointer *target, rspamd_mempool_t *pool,
		const gchar *src, gboolean is_hash)
{
	union {
		GHashTable *hv;
		GList *lv;
		gpointer p;
	} d;
	gchar *val;

	d.p = *target;

	if (is_hash) {
		if (d.hv == NULL) {
			d.hv = g_hash_table_new (rspamd_str_hash, rspamd_str_equal);
			rspamd_mempool_add_destructor (pool,
					(rspamd_mempool_destruct_t)g_hash_table_unref, d.hv);
		}

		val = rspamd_mempool_strdup (pool, src);
		g_hash_table_insert (d.hv, val, val);
	}
	else {
		val = rspamd_mempool_strdup (pool, src);
		d.lv = g_list_prepend (d.lv, val);
	}

	*target = d.p;
}

gboolean
rspamd_rcl_parse_struct_string_list (rspamd_mempool_t *pool,
	const ucl_object_t *obj,
	gpointer ud,
	struct rspamd_rcl_section *section,
	GError **err)
{
	struct rspamd_rcl_struct_parser *pd = ud;
	gpointer *target;
	gchar *val, **strvec, **cvec;
	const ucl_object_t *cur;
	const gsize num_str_len = 32;
	ucl_object_iter_t iter = NULL;
	gboolean is_hash, need_destructor = TRUE;


	is_hash = pd->flags & RSPAMD_CL_FLAG_STRING_LIST_HASH;
	target = (gpointer *)(((gchar *)pd->user_struct) + pd->offset);

	if (!is_hash && *target != NULL) {
		need_destructor = FALSE;
	}

	iter = ucl_object_iterate_new (obj);

	while ((cur = ucl_object_iterate_safe (iter, true)) != NULL) {
		switch (cur->type) {
		case UCL_STRING:
			strvec = g_strsplit_set (ucl_object_tostring (cur), ",", -1);
			cvec = strvec;

			while (*cvec) {
				rspamd_rcl_insert_string_list_item (target, pool, *cvec, is_hash);
				cvec ++;
			}

			g_strfreev (strvec);
			/* Go to the next object */
			continue;
		case UCL_INT:
			val = rspamd_mempool_alloc (pool, num_str_len);
			rspamd_snprintf (val, num_str_len, "%L", cur->value.iv);
			break;
		case UCL_FLOAT:
			val = rspamd_mempool_alloc (pool, num_str_len);
			rspamd_snprintf (val, num_str_len, "%f", cur->value.dv);
			break;
		case UCL_BOOLEAN:
			val = rspamd_mempool_alloc (pool, num_str_len);
			rspamd_snprintf (val, num_str_len, "%s",
					((gboolean)cur->value.iv) ? "true" : "false");
			break;
		default:
			g_set_error (err,
					CFG_RCL_ERROR,
					EINVAL,
					"cannot convert an object or array to string: %s",
					ucl_object_key (obj));
			ucl_object_iterate_free (iter);

			return FALSE;
		}

		rspamd_rcl_insert_string_list_item (target, pool, val, is_hash);
	}

	ucl_object_iterate_free (iter);

	if (*target == NULL) {
		g_set_error (err,
				CFG_RCL_ERROR,
				EINVAL,
				"non-empty array of strings is expected: %s, "
				"got: %s, of length: %d",
				ucl_object_key (obj), ucl_object_type_to_string (obj->type),
				obj->len);
		return FALSE;
	}

	if (!is_hash && *target != NULL) {
		*target = g_list_reverse (*target);

		if (need_destructor) {
			rspamd_mempool_add_destructor (pool,
					(rspamd_mempool_destruct_t) g_list_free,
					*target);
		}
	}

	return TRUE;
}

gboolean
rspamd_rcl_parse_struct_ucl (rspamd_mempool_t *pool,
	const ucl_object_t *obj,
	gpointer ud,
	struct rspamd_rcl_section *section,
	GError **err)
{
	struct rspamd_rcl_struct_parser *pd = ud;
	const ucl_object_t **target;

	target = (const ucl_object_t **)(((gchar *)pd->user_struct) + pd->offset);

	*target = obj;

	return TRUE;
}


gboolean
rspamd_rcl_parse_struct_boolean (rspamd_mempool_t *pool,
	const ucl_object_t *obj,
	gpointer ud,
	struct rspamd_rcl_section *section,
	GError **err)
{
	struct rspamd_rcl_struct_parser *pd = ud;
	gboolean *target;

	target = (gboolean *)(((gchar *)pd->user_struct) + pd->offset);

	if (obj->type == UCL_BOOLEAN) {
		*target = obj->value.iv;
	}
	else if (obj->type == UCL_INT) {
		*target = obj->value.iv;
	}
	else {
		g_set_error (err,
				CFG_RCL_ERROR,
				EINVAL,
				"cannot convert an object to boolean: %s",
				ucl_object_key (obj));
		return FALSE;
	}

	if (pd->flags & RSPAMD_CL_FLAG_BOOLEAN_INVERSE) {
		*target = !*target;
	}

	return TRUE;
}

gboolean
rspamd_rcl_parse_struct_addr (rspamd_mempool_t *pool,
	const ucl_object_t *obj,
	gpointer ud,
	struct rspamd_rcl_section *section,
	GError **err)
{
	struct rspamd_rcl_struct_parser *pd = ud;
	rspamd_inet_addr_t **target;
	const gchar *val;

	target = (rspamd_inet_addr_t **)(((gchar *)pd->user_struct) + pd->offset);

	if (ucl_object_type (obj) == UCL_STRING) {
		val = ucl_object_tostring (obj);

		if (!rspamd_parse_inet_address (target, val, 0)) {
			g_set_error (err,
				CFG_RCL_ERROR,
				EINVAL,
				"cannot parse inet address: %s", val);
			return FALSE;
		}
	}
	else {
		g_set_error (err,
				CFG_RCL_ERROR,
				EINVAL,
				"cannot convert an object to inet address: %s",
				ucl_object_key (obj));
		return FALSE;
	}

	return TRUE;
}

gboolean
rspamd_rcl_parse_struct_mime_addr (rspamd_mempool_t *pool,
	const ucl_object_t *obj,
	gpointer ud,
	struct rspamd_rcl_section *section,
	GError **err)
{
	struct rspamd_rcl_struct_parser *pd = ud;
	GPtrArray **target, *tmp_addr = NULL;
	const gchar *val;
	ucl_object_iter_t it;
	const ucl_object_t *cur;

	target = (GPtrArray **)(((gchar *)pd->user_struct) + pd->offset);
	it = ucl_object_iterate_new (obj);

	while ((cur = ucl_object_iterate_safe (it, true)) != NULL) {
		if (ucl_object_type (cur) == UCL_STRING) {
			val = ucl_object_tostring (obj);
			tmp_addr = rspamd_email_address_from_mime (pool, val,
					strlen (val), tmp_addr);
		}
		else {
			g_set_error (err,
					CFG_RCL_ERROR,
					EINVAL,
					"cannot get inet address from ucl object in %s",
					ucl_object_key (obj));
			ucl_object_iterate_free (it);

			return FALSE;
		}
	}

	ucl_object_iterate_free (it);
	*target = tmp_addr;

	return TRUE;
}

static guint
rspamd_worker_param_key_hash (gconstpointer p)
{
	const struct rspamd_worker_param_key *k = p;
	rspamd_cryptobox_fast_hash_state_t st;

	rspamd_cryptobox_fast_hash_init (&st, rspamd_hash_seed ());
	rspamd_cryptobox_fast_hash_update (&st, k->name, strlen (k->name));
	rspamd_cryptobox_fast_hash_update (&st, &k->ptr, sizeof (gpointer));

	return rspamd_cryptobox_fast_hash_final (&st);
}

static gboolean
rspamd_worker_param_key_equal (gconstpointer p1, gconstpointer p2)
{
	const struct rspamd_worker_param_key *k1 = p1, *k2 = p2;

	if (k1->ptr == k2->ptr) {
		return strcmp (k1->name, k2->name) == 0;
	}

	return FALSE;
}

void
rspamd_rcl_register_worker_option (struct rspamd_config *cfg,
		GQuark type,
		const gchar *name,
		rspamd_rcl_default_handler_t handler,
		gpointer target,
		glong offset,
		gint flags,
		const gchar *doc_string)
{
	struct rspamd_worker_param_parser *nhandler;
	struct rspamd_worker_cfg_parser *nparser;
	struct rspamd_worker_param_key srch;
	const ucl_object_t *doc_workers, *doc_target;
	ucl_object_t *doc_obj;

	nparser = g_hash_table_lookup (cfg->wrk_parsers, &type);

	if (nparser == NULL) {
		rspamd_rcl_register_worker_parser (cfg, type, NULL, NULL);
		nparser = g_hash_table_lookup (cfg->wrk_parsers, &type);

		g_assert (nparser != NULL);
	}

	srch.name = name;
	srch.ptr = target;

	nhandler = g_hash_table_lookup (nparser->parsers, &srch);
	if (nhandler != NULL) {
		msg_warn_config (
			"handler for parameter %s is already registered for worker type %s",
			name,
			g_quark_to_string (type));
		return;
	}

	nhandler =
		rspamd_mempool_alloc0 (cfg->cfg_pool,
			sizeof (struct rspamd_worker_param_parser));
	nhandler->key.name = name;
	nhandler->key.ptr = target;
	nhandler->parser.flags = flags;
	nhandler->parser.offset = offset;
	nhandler->parser.user_struct = target;
	nhandler->handler = handler;

	g_hash_table_insert (nparser->parsers, &nhandler->key, nhandler);

	doc_workers = ucl_object_lookup (cfg->doc_strings, "workers");

	if (doc_workers == NULL) {
		doc_obj = ucl_object_typed_new (UCL_OBJECT);
		ucl_object_insert_key (cfg->doc_strings, doc_obj, "workers", 0, false);
		doc_workers = doc_obj;
	}

	doc_target = ucl_object_lookup (doc_workers, g_quark_to_string (type));

	if (doc_target == NULL) {
		doc_obj = ucl_object_typed_new (UCL_OBJECT);
		ucl_object_insert_key ((ucl_object_t *)doc_workers, doc_obj,
				g_quark_to_string (type), 0, true);
		doc_target = doc_obj;
	}

	rspamd_rcl_add_doc_obj ((ucl_object_t *) doc_target,
			doc_string,
			name,
			UCL_NULL,
			handler,
			flags,
			NULL,
			0);
}


void
rspamd_rcl_register_worker_parser (struct rspamd_config *cfg, gint type,
	gboolean (*func)(ucl_object_t *, gpointer), gpointer ud)
{
	struct rspamd_worker_cfg_parser *nparser;

	nparser = g_hash_table_lookup (cfg->wrk_parsers, &type);

	if (nparser == NULL) {
		/* Allocate new parser for this worker */
		nparser =
			rspamd_mempool_alloc0 (cfg->cfg_pool,
				sizeof (struct rspamd_worker_cfg_parser));
		nparser->type = type;
		nparser->parsers = g_hash_table_new (rspamd_worker_param_key_hash,
				rspamd_worker_param_key_equal);
		rspamd_mempool_add_destructor (cfg->cfg_pool,
				(rspamd_mempool_destruct_t)g_hash_table_unref, nparser->parsers);

		g_hash_table_insert (cfg->wrk_parsers, &nparser->type, nparser);
	}

	nparser->def_obj_parser = func;
	nparser->def_ud = ud;
}

/* Checksum functions */
static int
rspamd_rcl_emitter_append_c (unsigned char c, size_t nchars, void *ud)
{
	rspamd_cryptobox_hash_state_t *hs = ud;
	guint64 d[2];

	d[0] = nchars;
	d[1] = c;

	rspamd_cryptobox_hash_update (hs, (const guchar *)d, sizeof (d));

	return 0;
}

static int
rspamd_rcl_emitter_append_len (unsigned const char *str, size_t len, void *ud)
{
	rspamd_cryptobox_hash_state_t *hs = ud;

	rspamd_cryptobox_hash_update (hs, str, len);

	return 0;
}
static int
rspamd_rcl_emitter_append_int (int64_t elt, void *ud)
{
	rspamd_cryptobox_hash_state_t *hs = ud;

	rspamd_cryptobox_hash_update (hs, (const guchar *)&elt, sizeof (elt));

	return 0;
}

static int
rspamd_rcl_emitter_append_double (double elt, void *ud)
{
	rspamd_cryptobox_hash_state_t *hs = ud;

	rspamd_cryptobox_hash_update (hs, (const guchar *)&elt, sizeof (elt));

	return 0;
}

void
rspamd_rcl_section_free (gpointer p)
{
	struct rspamd_rcl_section *top = p, *cur, *tmp;
	struct rspamd_rcl_default_handler_data *dh, *dhtmp;

	HASH_ITER (hh, top, cur, tmp) {
		HASH_DEL (top, cur);

		if (cur->subsections) {
			rspamd_rcl_section_free (cur->subsections);
		}

		HASH_ITER (hh, cur->default_parser, dh, dhtmp) {
			HASH_DEL (cur->default_parser, dh);
			g_free (dh->key);
			g_free (dh);
		}

		ucl_object_unref (cur->doc_ref);
		g_free (cur);
	}
}

/**
 * Calls for an external lua function to apply potential config transformations
 * if needed. This function can change the cfg->rcl_obj.
 *
 * Example of transformation function:
 *
 * function(obj)
 *   if obj.something == 'foo' then
 *     obj.something = "bla"
 *     return true, obj
 *   end
 *
 *   return false, nil
 * end
 *
 * If function returns 'false' then rcl_obj is not touched. Otherwise,
 * it is changed, then rcl_obj is imported from lua. Old config is dereferenced.
 * @param cfg
 */
void
rspamd_rcl_maybe_apply_lua_transform (struct rspamd_config *cfg)
{
	lua_State *L = cfg->lua_state;
	gint err_idx, ret;
	GString *tb;
	gchar str[PATH_MAX];
	static const char *transform_script = "lua_cfg_transform";

	g_assert (L != NULL);

	rspamd_snprintf (str, sizeof (str), "return require \"%s\"",
			transform_script);

	if (luaL_dostring (L, str) != 0) {
		msg_warn_config ("cannot execute lua script %s: %s",
				str, lua_tostring (L, -1));
		return;
	}
	else {
		if (lua_type (L, -1) != LUA_TFUNCTION) {
			msg_warn_config ("lua script must return "
					"function and not %s",
					lua_typename (L, lua_type (L, -1)));

			return;
		}
	}

	lua_pushcfunction (L, &rspamd_lua_traceback);
	err_idx = lua_gettop (L);

	/* Push function */
	lua_pushvalue (L, -2);

	/* Push the existing config */
	ucl_object_push_lua (L, cfg->rcl_obj, true);

	if ((ret = lua_pcall (L, 1, 2, err_idx)) != 0) {
		tb = lua_touserdata (L, -1);
		msg_err ("call to rspamadm lua script failed (%d): %v", ret, tb);

		if (tb) {
			g_string_free (tb, TRUE);
		}

		lua_settop (L, 0);

		return;
	}

	if (lua_toboolean (L, -2) && lua_type (L, -1) == LUA_TTABLE) {
		ucl_object_t *old_cfg = cfg->rcl_obj;

		msg_info_config ("configuration has been transformed in Lua");
		cfg->rcl_obj = ucl_object_lua_import (L, -1);
		ucl_object_unref (old_cfg);
	}

	/* error function */
	lua_settop (L, 0);
}

static bool
rspamd_rcl_decrypt_handler(struct ucl_parser *parser,
						   const unsigned char *source, size_t source_len,
						   unsigned char **destination, size_t *dest_len,
						   void *user_data)
{
	GError *err = NULL;
	struct rspamd_cryptobox_keypair *kp = (struct rspamd_cryptobox_keypair *)user_data;

	if (!rspamd_keypair_decrypt (kp, source, source_len,
			destination, dest_len, &err)) {
		msg_err ("cannot decrypt file: %e", err);
		g_error_free (err);

		return false;
	}

	return true;
}

static void
rspamd_rcl_decrypt_free (unsigned char *data, size_t len, void *user_data)
{
	g_free (data);
}

void
rspamd_config_calculate_cksum (struct rspamd_config *cfg)
{
	rspamd_cryptobox_hash_state_t hs;
	unsigned char cksumbuf[rspamd_cryptobox_HASHBYTES];
	struct ucl_emitter_functions f;

	/* Calculate checksum */
	rspamd_cryptobox_hash_init (&hs, NULL, 0);
	f.ucl_emitter_append_character = rspamd_rcl_emitter_append_c;
	f.ucl_emitter_append_double = rspamd_rcl_emitter_append_double;
	f.ucl_emitter_append_int = rspamd_rcl_emitter_append_int;
	f.ucl_emitter_append_len = rspamd_rcl_emitter_append_len;
	f.ucl_emitter_free_func = NULL;
	f.ud = &hs;
	ucl_object_emit_full (cfg->rcl_obj, UCL_EMIT_MSGPACK,
			&f, cfg->config_comments);
	rspamd_cryptobox_hash_final (&hs, cksumbuf);
	cfg->checksum = rspamd_encode_base32 (cksumbuf, sizeof (cksumbuf));
	/* Also change the tag of cfg pool to be equal to the checksum */
	rspamd_strlcpy (cfg->cfg_pool->tag.uid, cfg->checksum,
			MIN (sizeof (cfg->cfg_pool->tag.uid), strlen (cfg->checksum)));
}

gboolean
rspamd_config_parse_ucl (struct rspamd_config *cfg, const gchar *filename,
					GHashTable *vars, GError **err)
{
	struct stat st;
	gint fd;
	struct ucl_parser *parser;
	gchar keypair_path[PATH_MAX];
	struct rspamd_cryptobox_keypair *decrypt_keypair = NULL;
	gchar *data;

	if (stat (filename, &st) == -1) {
		g_set_error (err, cfg_rcl_error_quark (), errno,
				"cannot stat %s: %s", filename, strerror (errno));
		return FALSE;
	}
	if ((fd = open (filename, O_RDONLY)) == -1) {
		g_set_error (err, cfg_rcl_error_quark (), errno,
				"cannot open %s: %s", filename, strerror (errno));
		return FALSE;

	}
	/* Now mmap this file to simplify reading process */
	if ((data = mmap (NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0)) == MAP_FAILED) {
		g_set_error (err, cfg_rcl_error_quark (), errno,
				"cannot mmap %s: %s", filename, strerror (errno));
		close (fd);
		return FALSE;
	}

	close (fd);

	/* Try to load keyfile if available */
	rspamd_snprintf (keypair_path, sizeof (keypair_path), "%s.key",
			filename);
	if (stat (keypair_path, &st) == -1 &&
		(fd = open (keypair_path, O_RDONLY)) != -1) {
		struct ucl_parser *kp_parser;

		kp_parser = ucl_parser_new (0);

		if (ucl_parser_add_fd (kp_parser, fd)) {
			ucl_object_t *kp_obj;

			kp_obj = ucl_parser_get_object (kp_parser);

			g_assert (kp_obj != NULL);
			decrypt_keypair = rspamd_keypair_from_ucl (kp_obj);

			if (decrypt_keypair == NULL) {
				msg_err_config_forced ("cannot load keypair from %s: invalid keypair",
						keypair_path);
			}
			else {
				/* Add decryption support to UCL */
				rspamd_mempool_add_destructor (cfg->cfg_pool,
						(rspamd_mempool_destruct_t)rspamd_keypair_unref,
						decrypt_keypair);
			}

			ucl_object_unref (kp_obj);
		}
		else {
			msg_err_config_forced ("cannot load keypair from %s: %s",
					keypair_path, ucl_parser_get_error (kp_parser));
		}

		ucl_parser_free (kp_parser);
	}

	parser = ucl_parser_new (UCL_PARSER_SAVE_COMMENTS);
	rspamd_ucl_add_conf_variables (parser, vars);
	rspamd_ucl_add_conf_macros (parser, cfg);
	ucl_parser_set_filevars (parser, filename, true);

	if (decrypt_keypair) {
		struct ucl_parser_special_handler *decrypt_handler;

		decrypt_handler = rspamd_mempool_alloc0 (cfg->cfg_pool,
				sizeof (*decrypt_handler));
		decrypt_handler->user_data = decrypt_keypair;
		decrypt_handler->magic = encrypted_magic;
		decrypt_handler->magic_len = sizeof (encrypted_magic);
		decrypt_handler->handler = rspamd_rcl_decrypt_handler;
		decrypt_handler->free_function = rspamd_rcl_decrypt_free;

		ucl_parser_add_special_handler (parser, decrypt_handler);
	}

	if (!ucl_parser_add_chunk (parser, data, st.st_size)) {
		g_set_error (err, cfg_rcl_error_quark (), errno,
				"ucl parser error: %s", ucl_parser_get_error (parser));
		ucl_parser_free (parser);
		munmap (data, st.st_size);

		return FALSE;
	}

	munmap (data, st.st_size);
	cfg->rcl_obj = ucl_parser_get_object (parser);
	cfg->config_comments = ucl_object_ref (ucl_parser_get_comments (parser));
	ucl_parser_free (parser);

	return TRUE;
}

gboolean
rspamd_config_read (struct rspamd_config *cfg, const gchar *filename,
					rspamd_rcl_section_fin_t logger_fin,
					gpointer logger_ud, GHashTable *vars)
{
	GError *err = NULL;
	struct rspamd_rcl_section *top, *logger_section;
	const ucl_object_t *logger_obj;

	if (!rspamd_config_parse_ucl (cfg, filename, vars, &err)) {
		msg_err_config_forced ("failed to load config: %e", err);
		g_error_free (err);

		return FALSE;
	}

	top = rspamd_rcl_config_init (cfg, NULL);
	rspamd_lua_set_path (cfg->lua_state, cfg->rcl_obj, vars);
	rspamd_lua_set_globals (cfg, cfg->lua_state, vars);
	rspamd_mempool_add_destructor (cfg->cfg_pool, rspamd_rcl_section_free, top);
	err = NULL;

	if (logger_fin != NULL) {
		HASH_FIND_STR (top, "logging", logger_section);

		if (logger_section != NULL) {
			logger_obj = ucl_object_lookup_any (cfg->rcl_obj, "logging",
					"logger", NULL);

			if (logger_obj == NULL) {
				logger_fin (cfg->cfg_pool, logger_ud);
			}
			else {
				if (!rspamd_rcl_process_section (cfg, logger_section, cfg,
						logger_obj, cfg->cfg_pool, &err)) {
					msg_err_config_forced ("cannot init logger: %e", err);
					g_error_free (err);

					return FALSE;
				} else {
					logger_fin (cfg->cfg_pool, logger_ud);
				}
			}

			HASH_DEL (top, logger_section);
		}
	}

	/* Transform config if needed */
	rspamd_rcl_maybe_apply_lua_transform (cfg);
	rspamd_config_calculate_cksum (cfg);

	if (!rspamd_rcl_parse (top, cfg, cfg, cfg->cfg_pool, cfg->rcl_obj, &err)) {
		msg_err_config ("rcl parse error: %e", err);

		if (err) {
			g_error_free (err);
		}

		return FALSE;
	}

	cfg->lang_det = rspamd_language_detector_init (cfg);

	return TRUE;
}

static void
rspamd_rcl_doc_obj_from_handler (ucl_object_t *doc_obj,
		rspamd_rcl_default_handler_t handler,
		gint flags)
{
	gboolean has_example = FALSE, has_type = FALSE;
	const gchar *type = NULL;

	if (ucl_object_lookup (doc_obj, "example") != NULL) {
		has_example = TRUE;
	}

	if (ucl_object_lookup (doc_obj, "type") != NULL) {
		has_type = TRUE;
	}

	if (handler == rspamd_rcl_parse_struct_string) {
		if (!has_type) {
			ucl_object_insert_key (doc_obj, ucl_object_fromstring ("string"),
					"type", 0, false);
		}
	}
	else if (handler == rspamd_rcl_parse_struct_integer) {
		type = "int";

		if (flags & RSPAMD_CL_FLAG_INT_16) {
			type = "int16";
		}
		else if (flags & RSPAMD_CL_FLAG_INT_32) {
			type = "int32";
		}
		else if (flags & RSPAMD_CL_FLAG_INT_64) {
			type = "int64";
		}
		else if (flags & RSPAMD_CL_FLAG_INT_SIZE) {
			type = "size";
		}
		else if (flags & RSPAMD_CL_FLAG_UINT) {
			type = "uint";
		}

		if (!has_type) {
			ucl_object_insert_key (doc_obj, ucl_object_fromstring (type),
					"type", 0, false);
		}
	}
	else if (handler == rspamd_rcl_parse_struct_double) {
		if (!has_type) {
			ucl_object_insert_key (doc_obj, ucl_object_fromstring ("double"),
					"type", 0, false);
		}
	}
	else if (handler == rspamd_rcl_parse_struct_time) {
		type = "time";

		if (!has_type) {
			ucl_object_insert_key (doc_obj, ucl_object_fromstring (type),
					"type", 0, false);
		}
	}
	else if (handler == rspamd_rcl_parse_struct_string_list) {
		if (!has_type) {
			ucl_object_insert_key (doc_obj, ucl_object_fromstring ("string list"),
					"type", 0, false);
		}
		if (!has_example) {
			ucl_object_insert_key (doc_obj,
					ucl_object_fromstring_common ("param = \"str1, str2, str3\" OR "
							"param = [\"str1\", \"str2\", \"str3\"]", 0, 0),
					"example",
					0,
					false);
		}
	}
	else if (handler == rspamd_rcl_parse_struct_boolean) {
		if (!has_type) {
			ucl_object_insert_key (doc_obj,
					ucl_object_fromstring ("bool"),
					"type",
					0,
					false);
		}
	}
	else if (handler == rspamd_rcl_parse_struct_keypair) {
		if (!has_type) {
			ucl_object_insert_key (doc_obj,
					ucl_object_fromstring ("keypair"),
					"type",
					0,
					false);
		}
		if (!has_example) {
			ucl_object_insert_key (doc_obj,
					ucl_object_fromstring ("keypair { "
							"pubkey = <base32_string>;"
							" privkey = <base32_string>; "
							"}"),
					"example",
					0,
					false);
		}
	}
	else if (handler == rspamd_rcl_parse_struct_addr) {
		if (!has_type) {
			ucl_object_insert_key (doc_obj,
					ucl_object_fromstring ("socket address"),
					"type",
					0,
					false);
		}
	}
	else if (handler == rspamd_rcl_parse_struct_mime_addr) {
		if (!has_type) {
			ucl_object_insert_key (doc_obj,
					ucl_object_fromstring ("email address"),
					"type",
					0,
					false);
		}
	}
}

ucl_object_t *
rspamd_rcl_add_doc_obj (ucl_object_t *doc_target,
		const char *doc_string,
		const char *doc_name,
		ucl_type_t type,
		rspamd_rcl_default_handler_t handler,
		gint flags,
		const char *default_value,
		gboolean required)
{
	ucl_object_t *doc_obj;

	if (doc_target == NULL || doc_name == NULL) {
		return NULL;
	}

	doc_obj = ucl_object_typed_new (UCL_OBJECT);

	/* Insert doc string itself */
	if (doc_string) {
		ucl_object_insert_key (doc_obj,
				ucl_object_fromstring_common (doc_string, 0, 0),
				"data", 0, false);
	}
	else {
		ucl_object_insert_key (doc_obj, ucl_object_fromstring ("undocumented"),
				"data", 0, false);
	}

	if (type != UCL_NULL) {
		ucl_object_insert_key (doc_obj,
				ucl_object_fromstring (ucl_object_type_to_string (type)),
				"type", 0, false);
	}

	rspamd_rcl_doc_obj_from_handler (doc_obj, handler, flags);

	ucl_object_insert_key (doc_obj,
			ucl_object_frombool (required),
			"required", 0, false);

	if (default_value) {
		ucl_object_insert_key (doc_obj,
				ucl_object_fromstring_common (default_value, 0, 0),
				"default", 0, false);
	}

	ucl_object_insert_key (doc_target, doc_obj, doc_name, 0, true);

	return doc_obj;
}

ucl_object_t *
rspamd_rcl_add_doc_by_path (struct rspamd_config *cfg,
		const gchar *doc_path,
		const char *doc_string,
		const char *doc_name,
		ucl_type_t type,
		rspamd_rcl_default_handler_t handler,
		gint flags,
		const char *default_value,
		gboolean required)
{
	const ucl_object_t *found, *cur;
	ucl_object_t *obj;
	gchar **path_components, **comp;

	if (doc_path == NULL) {
		/* Assume top object */
		return rspamd_rcl_add_doc_obj (cfg->doc_strings,
				doc_string,
				doc_name,
				type,
				handler,
				flags,
				default_value,
				required);
	}
	else {
		found = ucl_object_lookup_path (cfg->doc_strings, doc_path);

		if (found != NULL) {
			return rspamd_rcl_add_doc_obj ((ucl_object_t *) found,
					doc_string,
					doc_name,
					type,
					handler,
					flags,
					default_value,
					required);
		}

		/* Otherwise we need to insert all components of the path */
		path_components = g_strsplit_set (doc_path, ".", -1);
		cur = cfg->doc_strings;

		for (comp = path_components; *comp != NULL; comp++) {
			if (ucl_object_type (cur) != UCL_OBJECT) {
				msg_err_config ("Bad path while lookup for '%s' at %s",
						doc_path, *comp);
				return NULL;
			}

			found = ucl_object_lookup (cur, *comp);

			if (found == NULL) {
				obj = ucl_object_typed_new (UCL_OBJECT);
				ucl_object_insert_key ((ucl_object_t *) cur,
						obj,
						*comp,
						0,
						true);
				cur = obj;
			}
			else {
				cur = found;
			}
		}
	}

	return rspamd_rcl_add_doc_obj (ucl_object_ref (cur),
			doc_string,
			doc_name,
			type,
			handler,
			flags,
			default_value,
			required);
}

static void
rspamd_rcl_add_doc_from_comments (struct rspamd_config *cfg,
		ucl_object_t *top_doc, const ucl_object_t *obj,
		const ucl_object_t *comments, gboolean is_top)
{
	ucl_object_iter_t it = NULL;
	const ucl_object_t *cur, *cmt;
	ucl_object_t *cur_doc;

	if (ucl_object_type (obj) == UCL_OBJECT) {
		while ((cur = ucl_object_iterate (obj, &it, true)) != NULL) {
			cur_doc = NULL;

			if ((cmt = ucl_comments_find (comments, cur)) != NULL) {
				cur_doc = rspamd_rcl_add_doc_obj (top_doc,
						ucl_object_tostring (cmt), ucl_object_key (cur),
						ucl_object_type (cur), NULL, 0, NULL, FALSE);
			}

			if (ucl_object_type (cur) == UCL_OBJECT) {
				if (cur_doc) {
					rspamd_rcl_add_doc_from_comments (cfg, cur_doc, cur,
							comments,
							FALSE);
				}
				else {
					rspamd_rcl_add_doc_from_comments (cfg, top_doc, cur,
							comments,
							FALSE);
				}
			}
		}
	}
	else if (!is_top) {
		if ((cmt = ucl_comments_find (comments, obj)) != NULL) {
			rspamd_rcl_add_doc_obj (top_doc,
					ucl_object_tostring (cmt), ucl_object_key (obj),
					ucl_object_type (obj), NULL, 0, NULL, FALSE);
		}

	}
}

ucl_object_t *
rspamd_rcl_add_doc_by_example (struct rspamd_config *cfg,
		const gchar *root_path,
		const gchar *doc_string,
		const gchar *doc_name,
		const gchar *example_data, gsize example_len)
{
	struct ucl_parser *parser;
	ucl_object_t *top, *top_doc;
	const ucl_object_t *comments;

	parser = ucl_parser_new (UCL_PARSER_NO_FILEVARS|UCL_PARSER_SAVE_COMMENTS);

	if (!ucl_parser_add_chunk (parser, example_data, example_len)) {
		msg_err_config ("cannot parse example: %s",
				ucl_parser_get_error (parser));
		ucl_parser_free (parser);

		return NULL;
	}

	top = ucl_parser_get_object (parser);
	comments = ucl_parser_get_comments (parser);

	/* Add top object */
	top_doc = rspamd_rcl_add_doc_by_path (cfg, root_path, doc_string,
			doc_name, ucl_object_type (top), NULL, 0, NULL, FALSE);
	ucl_object_insert_key (top_doc,
			ucl_object_fromstring_common (example_data, example_len, 0),
			"example", 0, false);

	rspamd_rcl_add_doc_from_comments (cfg, top_doc, top, comments, TRUE);

	return top_doc;
}