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124 lines
4.4 KiB
C
124 lines
4.4 KiB
C
/* Copyright (C) 2007-2020 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 Victor Julien <victor@inliniac.net>
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*/
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#ifndef SURICATA_DETECT_PARSE_H
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#define SURICATA_DETECT_PARSE_H
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#include "detect.h"
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#include "detect-engine-mpm.h"
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/* File handler registration */
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#define MAX_DETECT_ALPROTO_CNT 10
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typedef struct DetectFileHandlerTableElmt_ {
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const char *name;
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int priority;
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PrefilterRegisterFunc PrefilterFn;
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InspectEngineFuncPtr Callback;
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InspectionBufferGetDataPtr GetData;
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int al_protocols[MAX_DETECT_ALPROTO_CNT];
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int tx_progress;
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int progress;
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} DetectFileHandlerTableElmt;
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void DetectFileRegisterFileProtocols(DetectFileHandlerTableElmt *entry);
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/* File registration table */
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extern DetectFileHandlerTableElmt filehandler_table[DETECT_TBLSIZE];
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/** Flags to indicate if the Signature parsing must be done
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* switching the source and dest (for ip addresses and ports)
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* or otherwise as normal */
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enum {
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SIG_DIREC_NORMAL,
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SIG_DIREC_SWITCHED
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};
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/** Flags to indicate if are referencing the source of the Signature
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* or the destination (for ip addresses and ports)*/
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enum {
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SIG_DIREC_SRC,
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SIG_DIREC_DST
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};
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typedef struct DetectParseRegex {
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pcre2_code *regex;
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pcre2_match_context *context;
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struct DetectParseRegex *next;
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} DetectParseRegex;
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/* prototypes */
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int SignatureInitDataBufferCheckExpand(Signature *s);
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Signature *SigAlloc(void);
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void SigFree(DetectEngineCtx *de_ctx, Signature *s);
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Signature *SigInit(DetectEngineCtx *, const char *sigstr);
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SigMatchData* SigMatchList2DataArray(SigMatch *head);
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void SigParseRegisterTests(void);
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Signature *DetectEngineAppendSig(DetectEngineCtx *, const char *);
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SigMatch *SigMatchAppendSMToList(DetectEngineCtx *, Signature *, uint16_t, SigMatchCtx *, int);
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void SigMatchRemoveSMFromList(Signature *, SigMatch *, int);
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int SigMatchListSMBelongsTo(const Signature *, const SigMatch *);
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int DetectParseDupSigHashInit(DetectEngineCtx *);
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void DetectParseDupSigHashFree(DetectEngineCtx *);
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int DetectEngineContentModifierBufferSetup(DetectEngineCtx *de_ctx,
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Signature *s, const char *arg, int sm_type, int sm_list,
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AppProto alproto);
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bool SigMatchSilentErrorEnabled(const DetectEngineCtx *de_ctx,
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const enum DetectKeywordId id);
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bool SigMatchStrictEnabled(const enum DetectKeywordId id);
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const char *DetectListToHumanString(int list);
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const char *DetectListToString(int list);
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void SigTableApplyStrictCommandLineOption(const char *str);
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SigMatch *DetectGetLastSM(const Signature *);
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SigMatch *DetectGetLastSMFromMpmLists(const DetectEngineCtx *de_ctx, const Signature *s);
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SigMatch *DetectGetLastSMFromLists(const Signature *s, ...);
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SigMatch *DetectGetLastSMByListPtr(const Signature *s, SigMatch *sm_list, ...);
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SigMatch *DetectGetLastSMByListId(const Signature *s, int list_id, ...);
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int DetectSignatureAddTransform(Signature *s, int transform, void *options);
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int WARN_UNUSED DetectSignatureSetAppProto(Signature *s, AppProto alproto);
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/* parse regex setup and free util funcs */
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DetectParseRegex *DetectSetupPCRE2(const char *parse_str, int opts);
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bool DetectSetupParseRegexesOpts(const char *parse_str, DetectParseRegex *parse_regex, int opts);
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void DetectSetupParseRegexes(const char *parse_str, DetectParseRegex *parse_regex);
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void DetectParseRegexAddToFreeList(DetectParseRegex *parse_regex);
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void DetectParseFreeRegexes(void);
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void DetectParseFreeRegex(DetectParseRegex *r);
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/* parse regex exec */
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int DetectParsePcreExec(DetectParseRegex *parse_regex, pcre2_match_data **match, const char *str,
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int start_offset, int options);
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int SC_Pcre2SubstringCopy(
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pcre2_match_data *match_data, uint32_t number, PCRE2_UCHAR *buffer, PCRE2_SIZE *bufflen);
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int SC_Pcre2SubstringGet(pcre2_match_data *match_data, uint32_t number, PCRE2_UCHAR **bufferptr,
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PCRE2_SIZE *bufflen);
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#endif /* SURICATA_DETECT_PARSE_H */
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