clamav/libclamav/regex_list.h

/*
 *  Match a string against a list of patterns/regexes.
 *
 *  Copyright (C) 2013-2025 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
 *  Copyright (C) 2007-2013 Sourcefire, Inc.
 *
 *  Authors: Török Edvin
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 *  MA 02110-1301, USA.
 */

#ifndef _REGEX_LIST_H
#define _REGEX_LIST_H

#include "phishcheck.h"
#include "readdb.h"
#include "matcher.h"
#include "filtering.h"
#include "hashtab.h"
#include <zlib.h> /* for gzFile */

#include "mpool.h"

struct regex_list_ht {
    struct regex_list* head;
    struct regex_list* tail;
};

struct regex_matcher {
    struct cli_hashtable suffix_hash;
    size_t suffix_cnt;
    struct regex_list_ht* suffix_regexes;
    size_t root_regex_idx;
    size_t regex_cnt;
    regex_t** all_pregs;
    struct cli_matcher suffixes;
    struct cli_matcher sha2_256_hashes;
    struct cli_hashset sha2_256_pfx_set;
    struct cli_matcher hostkey_prefix;
    struct filter filter;
#ifdef USE_MPOOL
    mpool_t* mempool;
#endif
    int list_inited : 2;
    int list_loaded : 2;
    int list_built : 2;
};

cl_error_t cli_build_regex_list(struct regex_matcher* matcher);
cl_error_t regex_list_add_pattern(struct regex_matcher* matcher, char* pattern);
cl_error_t regex_list_match(struct regex_matcher* matcher, char* real_url, const char* display_url, const struct pre_fixup_info* pre_fixup, int hostOnly, const char** info, int is_allow_list_lookup);
cl_error_t init_regex_list(struct regex_matcher* matcher, uint8_t dconf_prefiltering);
cl_error_t load_regex_matcher(struct cl_engine* engine, struct regex_matcher* matcher, FILE* fd, unsigned int* signo, unsigned int options, int is_allow_list_lookup, struct cli_dbio* dbio, uint8_t dconf_prefiltering);
void regex_list_cleanup(struct regex_matcher* matcher);
void regex_list_done(struct regex_matcher* matcher);
int is_regex_ok(struct regex_matcher* matcher);

#endif