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/*
* Copyright (c) 2015, Vsevolod Stakhov
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY AUTHOR ''AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef RSPAMD_RE_CACHE_H
#define RSPAMD_RE_CACHE_H
#include "config.h"
#include "libutil/regexp.h"
struct rspamd_re_cache;
struct rspamd_re_runtime;
struct rspamd_task;
struct rspamd_config;
enum rspamd_re_type {
RSPAMD_RE_HEADER,
RSPAMD_RE_RAWHEADER,
RSPAMD_RE_ALLHEADER,
RSPAMD_RE_MIME,
RSPAMD_RE_RAWMIME,
RSPAMD_RE_URL,
RSPAMD_RE_BODY,
RSPAMD_RE_MAX
};
struct rspamd_re_cache_stat {
guint64 bytes_scanned;
guint64 bytes_scanned_pcre;
guint regexp_checked;
guint regexp_matched;
};
/**
* Initialize re_cache persistent structure
*/
struct rspamd_re_cache *rspamd_re_cache_new (void);
/**
* Add the existing regexp to the cache
* @param cache cache object
* @param re regexp object
* @param type type of object
* @param type_data associated data with the type (e.g. header name)
* @param datalen associated data length
*/
void rspamd_re_cache_add (struct rspamd_re_cache *cache, rspamd_regexp_t *re,
enum rspamd_re_type type, gpointer type_data, gsize datalen);
/**
* Replace regexp in the cache with another regexp
* @param cache cache object
* @param what re to replace
* @param with regexp object to replace the origin
*/
void rspamd_re_cache_replace (struct rspamd_re_cache *cache,
rspamd_regexp_t *what,
rspamd_regexp_t *with);
/**
* Initialize and optimize re cache structure
*/
void rspamd_re_cache_init (struct rspamd_re_cache *cache,
struct rspamd_config *cfg);
/**
* Get runtime data for a cache
*/
struct rspamd_re_runtime* rspamd_re_cache_runtime_new (struct rspamd_re_cache *cache);
/**
* Get runtime statistics
*/
const struct rspamd_re_cache_stat *
rspamd_re_cache_get_stat (struct rspamd_re_runtime *rt);
/**
* Process regexp runtime and return the result for a specific regexp
* @param task task object
* @param rt cache runtime object
* @param re regexp object
* @param type type of object
* @param type_data associated data with the type (e.g. header name)
* @param datalen associated data length
* @param is_strong use case sensitive match when looking for headers
*/
gint rspamd_re_cache_process (struct rspamd_task *task,
struct rspamd_re_runtime *rt,
rspamd_regexp_t *re,
enum rspamd_re_type type,
gpointer type_data,
gsize datalen,
gboolean is_strong);
/**
* Destroy runtime data
*/
void rspamd_re_cache_runtime_destroy (struct rspamd_re_runtime *rt);
/**
* Unref re cache
*/
void rspamd_re_cache_unref (struct rspamd_re_cache *cache);
/**
* Retain reference to re cache
*/
struct rspamd_re_cache *rspamd_re_cache_ref (struct rspamd_re_cache *cache);
/**
* Set limit for all regular expressions in the cache, returns previous limit
*/
guint rspamd_re_cache_set_limit (struct rspamd_re_cache *cache, guint limit);
/**
* Convert re type to a human readable string (constant one)
*/
const gchar * rspamd_re_cache_type_to_string (enum rspamd_re_type type);
/**
* Convert re type string to the type enum
*/
enum rspamd_re_type rspamd_re_cache_type_from_string (const char *str);
/**
* Compile expressions to the hyperscan tree and store in the `cache_dir`
*/
gint rspamd_re_cache_compile_hyperscan (struct rspamd_re_cache *cache,
const char *cache_dir, gdouble max_time,
GError **err);
/**
* Returns TRUE if the specified file is valid hyperscan cache
*/
gboolean rspamd_re_cache_is_valid_hyperscan_file (struct rspamd_re_cache *cache,
const char *path, gboolean silent);
/**
* Loads all hyperscan regexps precompiled
*/
gboolean rspamd_re_cache_load_hyperscan (struct rspamd_re_cache *cache,
const char *cache_dir);
#endif
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