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103 lines
3.6 KiB
103 lines
3.6 KiB
/*
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* Copyright (C) 2007-2013 Sourcefire, Inc.
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*
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* Authors: Tomasz Kojm
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free 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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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#ifndef __MATCHER_AC_H
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#define __MATCHER_AC_H
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#include <sys/types.h>
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#include "filetypes.h"
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#include "cltypes.h"
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#include "fmap.h"
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#include "hashtab.h"
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#define AC_CH_MAXDIST 32
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#define AC_SCAN_VIR 1
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#define AC_SCAN_FT 2
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struct cli_ac_data {
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int32_t ***offmatrix;
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uint32_t partsigs, lsigs, reloffsigs;
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uint32_t **lsigcnt;
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uint32_t **lsigsuboff_last, **lsigsuboff_first;
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uint32_t *offset;
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uint32_t macro_lastmatch[32];
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/** Hashset for versioninfo matching */
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const struct cli_hashset *vinfo;
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uint32_t min_partno;
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};
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struct cli_ac_special {
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unsigned char *str;
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struct cli_ac_special *next;
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uint16_t len, num;
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uint8_t type, negative;
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};
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struct cli_ac_patt {
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uint16_t *pattern, *prefix, length, prefix_length;
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uint32_t mindist, maxdist;
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uint32_t sigid;
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uint32_t lsigid[3];
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uint16_t ch[2];
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char *virname;
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void *customdata;
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uint16_t ch_mindist[2];
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uint16_t ch_maxdist[2];
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uint16_t parts, partno, special, special_pattern, special_len;
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struct cli_ac_special **special_table;
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struct cli_ac_patt *next, *next_same;
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uint16_t rtype, type;
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uint32_t offdata[4], offset_min, offset_max;
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uint32_t boundary;
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uint8_t depth;
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};
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struct cli_ac_node {
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struct cli_ac_patt *list;
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struct cli_ac_node **trans, *fail;
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};
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#define IS_LEAF(node) (!node->trans)
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#define IS_FINAL(node) (!!node->list)
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struct cli_ac_result {
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const char *virname;
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void *customdata;
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off_t offset;
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struct cli_ac_result *next;
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};
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#include "matcher.h"
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int cli_ac_addpatt(struct cli_matcher *root, struct cli_ac_patt *pattern);
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int cli_ac_initdata(struct cli_ac_data *data, uint32_t partsigs, uint32_t lsigs, uint32_t reloffsigs, uint8_t tracklen);
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void cli_ac_chkmacro(struct cli_matcher *root, struct cli_ac_data *data, unsigned lsigid1);
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int cli_ac_chklsig(const char *expr, const char *end, uint32_t *lsigcnt, unsigned int *cnt, uint64_t *ids, unsigned int parse_only);
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void cli_ac_freedata(struct cli_ac_data *data);
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int cli_ac_scanbuff(const unsigned char *buffer, uint32_t length, const char **virname, void **customdata, struct cli_ac_result **res, const struct cli_matcher *root, struct cli_ac_data *mdata, uint32_t offset, cli_file_t ftype, struct cli_matched_type **ftoffset, unsigned int mode, cli_ctx *ctx);
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int cli_ac_buildtrie(struct cli_matcher *root);
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int cli_ac_init(struct cli_matcher *root, uint8_t mindepth, uint8_t maxdepth, uint8_t dconf_prefiltering);
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int cli_ac_caloff(const struct cli_matcher *root, struct cli_ac_data *data, const struct cli_target_info *info);
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void cli_ac_free(struct cli_matcher *root);
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int cli_ac_addsig(struct cli_matcher *root, const char *virname, const char *hexsig, uint32_t sigid, uint16_t parts, uint16_t partno, uint16_t rtype, uint16_t type, uint32_t mindist, uint32_t maxdist, const char *offset, const uint32_t *lsigid, unsigned int options);
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#endif
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