rspamd/src/libutil/map.h

#ifndef RSPAMD_MAP_H
#define RSPAMD_MAP_H

#include "config.h"
#include <event.h>

#include "ucl.h"
#include "mem_pool.h"
#include "radix.h"
#include "dns.h"

/**
 * Maps API is designed to load lists data from different dynamic sources.
 * It monitor files and HTTP locations for modifications and reload them if they are
 * modified.
 */
struct map_cb_data;

/**
 * Callback types
 */
typedef gchar * (*map_cb_t)(gchar *chunk, gint len,
	struct map_cb_data *data, gboolean final);
typedef void (*map_fin_cb_t)(struct map_cb_data *data);
typedef void (*map_dtor_t)(struct map_cb_data *data);

typedef gboolean (*rspamd_map_traverse_cb)(gconstpointer key,
		gconstpointer value, gsize hits, gpointer ud);
typedef void (*rspamd_map_traverse_function)(void *data,
		rspamd_map_traverse_cb cb,
		gpointer cbdata, gboolean reset_hits);

/**
 * Common map object
 */
struct rspamd_config;
struct rspamd_map;

/**
 * Callback data for async load
 */
struct map_cb_data {
	struct rspamd_map *map;
	gint state;
	void *prev_data;
	void *cur_data;
};

/**
 * Returns TRUE if line looks like a map definition
 * @param map_line
 * @return
 */
gboolean rspamd_map_is_map (const gchar *map_line);

/**
 * Add map from line
 */
struct rspamd_map* rspamd_map_add (struct rspamd_config *cfg,
								   const gchar *map_line,
								   const gchar *description,
								   map_cb_t read_callback,
								   map_fin_cb_t fin_callback,
								   map_dtor_t dtor,
								   void **user_data);

/**
 * Add map from ucl
 */
struct rspamd_map* rspamd_map_add_from_ucl (struct rspamd_config *cfg,
											const ucl_object_t *obj,
											const gchar *description,
											map_cb_t read_callback,
											map_fin_cb_t fin_callback,
											map_dtor_t dtor,
											void **user_data);

/**
 * Start watching of maps by adding events to libevent event loop
 */
void rspamd_map_watch (struct rspamd_config *cfg,
					   struct event_base *ev_base,
					   struct rspamd_dns_resolver *resolver,
					   struct rspamd_worker *worker,
					   gboolean active_http);

/**
 * Preloads maps where all backends are file
 * @param cfg
 */
void rspamd_map_preload (struct rspamd_config *cfg);

/**
 * Remove all maps watched (remove events)
 */
void rspamd_map_remove_all (struct rspamd_config *cfg);

/**
 * Get traverse function for specific map
 * @param map
 * @return
 */
rspamd_map_traverse_function rspamd_map_get_traverse_function (struct rspamd_map *map);

/**
 * Perform map traverse
 * @param map
 * @param cb
 * @param cbdata
 * @param reset_hits
 * @return
 */
void rspamd_map_traverse (struct rspamd_map *map, rspamd_map_traverse_cb cb,
		gpointer cbdata, gboolean reset_hits);

#endif