mirror of https://github.com/OISF/suricata
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
54 lines
1.8 KiB
C
54 lines
1.8 KiB
C
/* 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 SURICATA_DETECT_DSIZE_H
|
|
#define SURICATA_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 /* SURICATA_DETECT_DSIZE_H */
|