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/*
* AIDE (Advanced Intrusion Detection Environment)
*
* Copyright (C) 1999-2002, 2006, 2016, 2020-2025 Rami Lehti, Pablo Virolainen,
* Richard van den Berg, Hannes von Haugwitz
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* 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 _RX_RULE_H_INCLUDED
#define _RX_RULE_H_INCLUDED
#include "config.h"
#include "file.h"
#include <sys/stat.h>
#define PCRE2_CODE_UNIT_WIDTH 8
#include <pcre2.h>
#include "attributes.h"
typedef struct rx_restriction_t {
FT_TYPE f_type;
#ifdef HAVE_FSTYPE
FS_TYPE fs_type;
#endif
} rx_restriction_t;
typedef enum {
AIDE_RECURSIVE_NEGATIVE_RULE=0,
AIDE_NON_RECURSIVE_NEGATIVE_RULE=1,
AIDE_SELECTIVE_RULE=2,
AIDE_EQUAL_RULE=3,
} AIDE_RULE_TYPE;
typedef struct rx_rule {
char* rx; /* Regular expression in text form */
pcre2_code* crx; /* Compiled regexp */
pcre2_match_data *md;
AIDE_RULE_TYPE type;
DB_ATTR_TYPE attr; /* Which attributes to save */
char *config_filename;
int config_linenumber;
char *config_line;
char *prefix;
rx_restriction_t restriction;
} rx_rule;
typedef enum match_result {
RESULT_NO_RULE_MATCH = 0,
RESULT_RECURSIVE_NEGATIVE_MATCH = (1<<0),
RESULT_NON_RECURSIVE_NEGATIVE_MATCH = (1<<1),
RESULT_SELECTIVE_MATCH = (1<<2),
RESULT_EQUAL_MATCH = (1<<3),
RESULT_PARTIAL_MATCH = (1<<4),
RESULT_NO_LIMIT_MATCH = (1<<5),
RESULT_PARTIAL_LIMIT_MATCH = (1<<6),
RESULT_PART_LIMIT_AND_NO_RECURSE_MATCH = (1<<7),
RESULT_NEGATIVE_PARENT_MATCH = (1<<8),
} match_result;
typedef struct match_t {
match_result result;
rx_rule* rule;
int length;
} match_t;
char* get_rule_type_long_string(AIDE_RULE_TYPE);
char* get_rule_type_char(AIDE_RULE_TYPE);
/* memory for the returned string is obtained with malloc(3), and should be freed with free(3). */
char *get_restriction_string(rx_restriction_t);
char *get_match_result_string(match_result);
char *get_match_result_desc(match_result);
#endif /* RX_RULE_H_INCLUDED */
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