82 lines
3.0 KiB
C
82 lines
3.0 KiB
C
/****************************************************************************
|
|
*
|
|
* Copyright (C) 2006-2010 Sourcefire, Inc.
|
|
*
|
|
* 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. You may not use, modify or
|
|
* distribute this program under any other version of the GNU General
|
|
* Public License.
|
|
*
|
|
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/*
|
|
* @file sfdir.h
|
|
* @author Adam Keeton <akeeton@sourcefire.com>
|
|
* @date Thu July 20 10:16:26 EDT 2006
|
|
*
|
|
* The implementation uses an multibit-trie that is similar to Gupta et-al's
|
|
* DIR-n-m.
|
|
*/
|
|
|
|
#ifndef SFRT_DIR_H_
|
|
#define SFRT_DIR_H_
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
/*******************************************************************/
|
|
/* DIR-n-m data structures
|
|
* Each table in the DIR-n-m method is represented by a
|
|
* dir_sub_table_t. They are managed by a dir_table_t. */
|
|
typedef struct
|
|
{
|
|
word *entries;
|
|
char *lengths;
|
|
int num_entries; /* Number of entries in this table */
|
|
int width; /* width of this table. */
|
|
/* While one determines the other, this way fewer
|
|
* calculations are needed at runtime, since both
|
|
* are used. */
|
|
int cur_num; /* Present number of used nodes */
|
|
} dir_sub_table_t;
|
|
|
|
/* Master data structure for the DIR-n-m derivative */
|
|
typedef struct
|
|
{
|
|
int *dimensions; /* DIR-n-m will consist of any number of arbitrarily
|
|
* long tables. This variable keeps track of the
|
|
* dimensions */
|
|
int dim_size; /* And this variable keeps track of 'dimensions''s
|
|
* dimensions! */
|
|
uint32_t mem_cap; /* User-defined maximum memory that can be allocated
|
|
* for the DIR-n-m derivative */
|
|
|
|
int cur_num; /* Present number of used nodes */
|
|
|
|
uint32_t allocated;
|
|
|
|
dir_sub_table_t *sub_table;
|
|
} dir_table_t;
|
|
|
|
/*******************************************************************/
|
|
/* DIR-n-m functions, these are not intended to be called directly */
|
|
dir_table_t * sfrt_dir_new(uint32_t mem_cap, int count,...);
|
|
void sfrt_dir_free(void *);
|
|
tuple_t sfrt_dir_lookup(IP ip, void *table);
|
|
int sfrt_dir_insert(IP ip, int len, word data_index,
|
|
int behavior, void *table);
|
|
uint32_t sfrt_dir_usage(void *table);
|
|
|
|
#endif /* SFRT_DIR_H_ */
|
|
|