util-mpm-ac.h

Go to the documentation of this file.

/* Copyright (C) 2007-2014 Open Information Security Foundation
 *
 * You can copy, redistribute or modify this Program 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
 * version 2 along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */
 
/**
 * \file
 *
 * \author Anoop Saldanha <anoopsaldanha@gmail.com>
 *
 */
 
#ifndef SURICATA_UTIL_MPM_AC__H
#define SURICATA_UTIL_MPM_AC__H
 
#include "util-mpm.h"
 
#define SC_AC_STATE_TYPE_U16 uint16_t
#define SC_AC_STATE_TYPE_U32 uint32_t
 
typedef struct SCACPatternList_ {
    uint8_t *cs;
    uint16_t patlen;
 
    uint16_t offset;
    uint16_t depth;
 
    bool endswith;
 
    /* sid(s) for this pattern */
    uint32_t sids_size;
    SigIntId *sids;
} SCACPatternList;
 
typedef struct SCACOutputTable_ {
    /* list of pattern sids */
    uint32_t *pids;
    /* no of entries we have in pids */
    uint32_t no_of_entries;
} SCACOutputTable;
 
typedef struct SCACCtx_ {
    /* pattern arrays.  We need this only during the goto table creation phase */
    MpmPattern **parray;
 
    /* no of states used by ac */
    uint32_t state_count;
 
    uint32_t pattern_id_bitarray_size;
 
    /* the all important memory hungry state_table */
    SC_AC_STATE_TYPE_U16 (*state_table_u16)[256];
    /* the all important memory hungry state_table */
    SC_AC_STATE_TYPE_U32 (*state_table_u32)[256];
 
    /* goto_table, failure table and output table.  Needed to create state_table.
     * Will be freed, once we have created the state_table */
    int32_t (*goto_table)[256];
    int32_t *failure_table;
    SCACOutputTable *output_table;
    SCACPatternList *pid_pat_list;
 
    /* the size of each state */
    uint32_t single_state_size;
 
    uint32_t allocated_state_count;
 
} SCACCtx;
 
void MpmACRegister(void);
 
#endif /* SURICATA_UTIL_MPM_AC__H */