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103 lines
3.0 KiB
C
103 lines
3.0 KiB
C
/* Copyright (C) 2007-2010 Open Information Security Foundation
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*
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* You can copy, redistribute or modify this Program under the terms of
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* the GNU General Public License version 2 as published by the Free
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* Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* version 2 along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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/**
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* \file
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*
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* \author Anoop Saldanha <poonaatsoc@gmail.com>
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*
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*/
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#define SC_AC_GFBS_STATE_TYPE_U16 uint16_t
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#define SC_AC_GFBS_STATE_TYPE_U32 uint32_t
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typedef struct SCACGfbsPattern_ {
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/* length of the pattern */
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uint16_t len;
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/* flags decribing the pattern */
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uint8_t flags;
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/* holds the original pattern that was added */
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uint8_t *original_pat;
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/* case sensitive */
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uint8_t *cs;
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/* case INsensitive */
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uint8_t *ci;
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/* pattern id */
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uint32_t id;
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struct SCACGfbsPattern_ *next;
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} SCACGfbsPattern;
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typedef struct SCACGfbsPatternList_ {
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uint8_t *cs;
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uint16_t patlen;
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} SCACGfbsPatternList;
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typedef struct SCACGfbsOutputTable_ {
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/* list of pattern sids */
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uint32_t *pids;
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/* no of entries we have in pids */
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uint32_t no_of_entries;
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} SCACGfbsOutputTable;
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typedef struct SCACGfbsGotoTableMod_ {
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/* each of these below declarations will be of type uint32_t, if the state
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* count exceeds 65535, the maximum value a 16 bit unsigned var can hold */
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/* no of entries stored below */
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uint16_t no_of_entries;
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/* the ascii codes over which we have state transitions */
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uint16_t *ascii_codes;
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/* the states that correspond to the ascii_codes above */
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uint16_t *states;
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} SCACGfbsGotoTableMod_;
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typedef struct SCACGfbsCtx_ {
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/* hash used during ctx initialization */
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SCACGfbsPattern **init_hash;
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/* pattern arrays. We need this only during the goto table creation phase */
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SCACGfbsPattern **parray;
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/* no of states used by ac */
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int32_t state_count;
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/* the modified goto_table */
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uint8_t *goto_table_mod;
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uint8_t **goto_table_mod_pointers;
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/* goto_table, failure table and output table. Needed to create state_table.
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* Will be freed, once we have created the goto_table_mod */
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int32_t (*goto_table)[256];
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int32_t *failure_table;
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SCACGfbsOutputTable *output_table;
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SCACGfbsPatternList *pid_pat_list;
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/* the size of each state */
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uint16_t single_state_size;
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uint16_t max_pat_id;
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} SCACGfbsCtx;
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typedef struct SCACGfbsThreadCtx_ {
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/* the total calls we make to the search function */
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uint32_t total_calls;
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/* the total patterns that we ended up matching against */
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uint64_t total_matches;
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} SCACGfbsThreadCtx;
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void MpmACGfbsRegister(void);
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