detect-engine-prefilter.h

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/* Copyright (C) 2016 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 Victor Julien <victor@inliniac.net>
 */
 
#ifndef __DETECT_ENGINE_PREFILTER_H__
#define __DETECT_ENGINE_PREFILTER_H__
 
#include "detect.h"
#include "detect-engine-state.h"
 
// TODO
typedef struct DetectTransaction_ {
    void *tx_ptr;
    const uint64_t tx_id;
    struct AppLayerTxData *tx_data_ptr;
    DetectEngineStateDirection *de_state;
    const uint64_t detect_flags; /* detect flags get/set from/to applayer */
    uint64_t prefilter_flags; /* prefilter flags for direction, to be updated by prefilter code */
    const uint64_t
            prefilter_flags_orig; /* prefilter flags for direction, before prefilter has run */
    const int tx_progress;
    const int tx_end_state;
} DetectTransaction;
 
typedef struct PrefilterStore_ {
    const char *name;
    void (*FreeFunc)(void *);
    uint32_t id;
} PrefilterStore;
 
void Prefilter(DetectEngineThreadCtx *, const SigGroupHead *, Packet *p,
        const uint8_t flags);
 
int PrefilterAppendEngine(DetectEngineCtx *de_ctx, SigGroupHead *sgh,
        void (*Prefilter)(DetectEngineThreadCtx *det_ctx, Packet *p, const void *pectx),
        void *pectx, void (*FreeFunc)(void *pectx),
        const char *name);
int PrefilterAppendPayloadEngine(DetectEngineCtx *de_ctx, SigGroupHead *sgh,
        void (*Prefilter)(DetectEngineThreadCtx *det_ctx, Packet *p, const void *pectx),
        void *pectx, void (*FreeFunc)(void *pectx),
        const char *name);
int PrefilterAppendTxEngine(DetectEngineCtx *de_ctx, SigGroupHead *sgh,
        PrefilterTxFn PrefilterTxFunc, const AppProto alproto, const int tx_min_progress,
        void *pectx, void (*FreeFunc)(void *pectx), const char *name);
int PrefilterAppendFrameEngine(DetectEngineCtx *de_ctx, SigGroupHead *sgh,
        PrefilterFrameFn PrefilterFrameFunc, AppProto alproto, uint8_t frame_type, void *pectx,
        void (*FreeFunc)(void *pectx), const char *name);
 
void DetectRunPrefilterTx(DetectEngineThreadCtx *det_ctx,
        const SigGroupHead *sgh,
        Packet *p,
        const uint8_t ipproto,
        const uint8_t flow_flags,
        const AppProto alproto,
        void *alstate,
        DetectTransaction *tx);
 
void PrefilterFreeEnginesList(PrefilterEngineList *list);
 
void PrefilterSetupRuleGroup(DetectEngineCtx *de_ctx, SigGroupHead *sgh);
void PrefilterCleanupRuleGroup(const DetectEngineCtx *de_ctx, SigGroupHead *sgh);
 
#ifdef PROFILING
const char *PrefilterStoreGetName(const uint32_t id);
#endif
 
void PrefilterInit(DetectEngineCtx *de_ctx);
void PrefilterDeinit(DetectEngineCtx *de_ctx);
 
int PrefilterGenericMpmRegister(DetectEngineCtx *de_ctx, SigGroupHead *sgh, MpmCtx *mpm_ctx,
        const DetectBufferMpmRegistry *mpm_reg, int list_id);
 
int PrefilterGenericMpmPktRegister(DetectEngineCtx *de_ctx, SigGroupHead *sgh, MpmCtx *mpm_ctx,
        const DetectBufferMpmRegistry *mpm_reg, int list_id);
 
#endif