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144 lines
2.9 KiB
C
144 lines
2.9 KiB
C
/* Copyright (C) 2007-2012 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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* IPPair queue handler functions
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*/
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#include "suricata-common.h"
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#include "threads.h"
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#include "debug.h"
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#include "ippair-queue.h"
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#include "util-error.h"
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#include "util-debug.h"
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#include "util-print.h"
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IPPairQueue *IPPairQueueInit (IPPairQueue *q)
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{
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if (q != NULL) {
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memset(q, 0, sizeof(IPPairQueue));
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HQLOCK_INIT(q);
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}
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return q;
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}
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IPPairQueue *IPPairQueueNew()
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{
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IPPairQueue *q = (IPPairQueue *)SCMalloc(sizeof(IPPairQueue));
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if (q == NULL) {
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SCLogError(SC_ERR_FATAL, "Fatal error encountered in IPPairQueueNew. Exiting...");
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exit(EXIT_SUCCESS);
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}
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q = IPPairQueueInit(q);
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return q;
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}
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/**
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* \brief Destroy a ippair queue
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*
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* \param q the ippair queue to destroy
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*/
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void IPPairQueueDestroy (IPPairQueue *q)
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{
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HQLOCK_DESTROY(q);
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}
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/**
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* \brief add a ippair to a queue
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*
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* \param q queue
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* \param h ippair
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*/
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void IPPairEnqueue (IPPairQueue *q, IPPair *h)
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{
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#ifdef DEBUG
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BUG_ON(q == NULL || h == NULL);
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#endif
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HQLOCK_LOCK(q);
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/* more ippairs in queue */
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if (q->top != NULL) {
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h->lnext = q->top;
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q->top->lprev = h;
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q->top = h;
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/* only ippair */
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} else {
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q->top = h;
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q->bot = h;
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}
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q->len++;
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#ifdef DBG_PERF
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if (q->len > q->dbg_maxlen)
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q->dbg_maxlen = q->len;
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#endif /* DBG_PERF */
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HQLOCK_UNLOCK(q);
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}
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/**
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* \brief remove a ippair from the queue
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*
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* \param q queue
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*
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* \retval h ippair or NULL if empty list.
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*/
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IPPair *IPPairDequeue (IPPairQueue *q)
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{
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HQLOCK_LOCK(q);
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IPPair *h = q->bot;
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if (h == NULL) {
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HQLOCK_UNLOCK(q);
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return NULL;
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}
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/* more packets in queue */
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if (q->bot->lprev != NULL) {
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q->bot = q->bot->lprev;
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q->bot->lnext = NULL;
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/* just the one we remove, so now empty */
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} else {
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q->top = NULL;
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q->bot = NULL;
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}
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#ifdef DEBUG
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BUG_ON(q->len == 0);
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#endif
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if (q->len > 0)
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q->len--;
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h->lnext = NULL;
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h->lprev = NULL;
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HQLOCK_UNLOCK(q);
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return h;
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}
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uint32_t IPPairQueueLen(IPPairQueue *q)
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{
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uint32_t len;
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HQLOCK_LOCK(q);
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len = q->len;
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HQLOCK_UNLOCK(q);
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return len;
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}
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