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86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
/* Copyright (C) 2014-2021 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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* Implements per ippair bits. Actually, not a bit,
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* but called that way because of Snort's flowbits.
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* It's a binary storage.
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*
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* \todo move away from a linked list implementation
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* \todo use different datatypes, such as string, int, etc.
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*/
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#include "suricata-common.h"
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#include "threads.h"
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#include "tx-bit.h"
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#include "detect.h"
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#include "util-var.h"
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#include "util-debug.h"
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#include "rust.h"
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static XBit *TxBitGet(AppLayerTxData *txd, uint32_t idx)
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{
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for (GenericVar *gv = txd->txbits; gv != NULL; gv = gv->next) {
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if (gv->type == DETECT_XBITS && gv->idx == idx) {
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return (XBit *)gv;
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}
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}
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return NULL;
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}
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static int TxBitAdd(AppLayerTxData *txd, uint32_t idx)
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{
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XBit *xb = TxBitGet(txd, idx);
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if (xb == NULL) {
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xb = SCMalloc(sizeof(XBit));
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if (unlikely(xb == NULL))
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return -1;
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xb->type = DETECT_XBITS;
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xb->idx = idx;
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xb->next = NULL;
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xb->expire = 0; // not used by tx bits
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GenericVarAppend(&txd->txbits, (GenericVar *)xb);
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return 1;
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}
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return 0;
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}
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int TxBitIsset(AppLayerTxData *txd, uint32_t idx)
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{
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XBit *xb = TxBitGet(txd, idx);
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if (xb != NULL) {
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SCLogDebug("isset %u return 1", idx);
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return 1;
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}
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SCLogDebug("isset %u r 0", idx);
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return 0;
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}
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int TxBitSet(AppLayerTxData *txd, uint32_t idx)
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{
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int r = TxBitAdd(txd, idx);
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SCLogDebug("set %u r %d", idx, r);
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return (r == 1);
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}
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