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/* Copyright (C) 2007-2022 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_DSIZE_H__
#define __DETECT_DSIZE_H__
#include "detect-engine-uint.h"
/* prototypes */
void DetectDsizeRegister (void);
int SigParseMaxRequiredDsize(const Signature *s);
int SigParseGetMaxDsize(const Signature *s);
void SigParseSetDsizePair(Signature *s);
void SigParseApplyDsizeToContent(Signature *s);
/** Determine if a packet p should be kicked out during prefilter due
* to dsize outside the range specified in signature s */
static inline bool SigDsizePrefilter(const Packet *p, const Signature *s, uint32_t sflags)
{
if (unlikely(sflags & SIG_FLAG_DSIZE)) {
if (likely(p->payload_len < s->dsize_low || p->payload_len > s->dsize_high)) {
if (!(s->dsize_mode == DETECT_UINT_NE)) {
SCLogDebug("kicked out as p->payload_len %u, dsize low %u, hi %u", p->payload_len,
s->dsize_low, s->dsize_high);
return true;
}
}
}
return false;
}
#endif /* __DETECT_DSIZE_H__ */
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