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Diffstat (limited to 'framework/src/suricata/src/defrag-timeout.c')
| -rw-r--r-- | framework/src/suricata/src/defrag-timeout.c | 153 |
1 files changed, 0 insertions, 153 deletions
diff --git a/framework/src/suricata/src/defrag-timeout.c b/framework/src/suricata/src/defrag-timeout.c deleted file mode 100644 index 663ee3b5..00000000 --- a/framework/src/suricata/src/defrag-timeout.c +++ /dev/null @@ -1,153 +0,0 @@ -/* Copyright (C) 2007-2012 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> - */ - -#include "suricata-common.h" -#include "defrag.h" -#include "defrag-hash.h" - -uint32_t DefragTrackerGetSpareCount(void) -{ - return DefragTrackerSpareQueueGetSize(); -} - -uint32_t DefragTrackerGetActiveCount(void) -{ - return SC_ATOMIC_GET(defragtracker_counter); -} - -/** \internal - * \brief See if we can really discard this tracker. Check use_cnt reference. - * - * \param dt tracker - * \param ts timestamp - * - * \retval 0 not timed out just yet - * \retval 1 fully timed out, lets kill it - */ -static int DefragTrackerTimedOut(DefragTracker *dt, struct timeval *ts) -{ - /** never prune a trackers that is used by a packet - * we are currently processing in one of the threads */ - if (SC_ATOMIC_GET(dt->use_cnt) > 0) { - return 0; - } - - /* retain if remove is not set and not timed out */ - if (!dt->remove && timercmp(&dt->timeout, ts, >)) - return 0; - - return 1; -} - -/** - * \internal - * - * \brief check all trackers in a hash row for timing out - * - * \param hb tracker hash row *LOCKED* - * \param dt last tracker in the hash row - * \param ts timestamp - * - * \retval cnt timed out tracker - */ -static uint32_t DefragTrackerHashRowTimeout(DefragTrackerHashRow *hb, DefragTracker *dt, struct timeval *ts) -{ - uint32_t cnt = 0; - - do { - if (SCMutexTrylock(&dt->lock) != 0) { - dt = dt->hprev; - continue; - } - - DefragTracker *next_dt = dt->hprev; - - /* check if the tracker is fully timed out and - * ready to be discarded. */ - if (DefragTrackerTimedOut(dt, ts) == 1) { - /* remove from the hash */ - if (dt->hprev != NULL) - dt->hprev->hnext = dt->hnext; - if (dt->hnext != NULL) - dt->hnext->hprev = dt->hprev; - if (hb->head == dt) - hb->head = dt->hnext; - if (hb->tail == dt) - hb->tail = dt->hprev; - - dt->hnext = NULL; - dt->hprev = NULL; - - DefragTrackerClearMemory(dt); - - /* no one is referring to this tracker, use_cnt 0, removed from hash - * so we can unlock it and move it back to the spare queue. */ - SCMutexUnlock(&dt->lock); - - /* move to spare list */ - DefragTrackerMoveToSpare(dt); - - cnt++; - } else { - SCMutexUnlock(&dt->lock); - } - - dt = next_dt; - } while (dt != NULL); - - return cnt; -} - -/** - * \brief time out tracker from the hash - * - * \param ts timestamp - * - * \retval cnt number of timed out tracker - */ -uint32_t DefragTimeoutHash(struct timeval *ts) -{ - uint32_t idx = 0; - uint32_t cnt = 0; - - for (idx = 0; idx < defrag_config.hash_size; idx++) { - DefragTrackerHashRow *hb = &defragtracker_hash[idx]; - - if (DRLOCK_TRYLOCK(hb) != 0) - continue; - - /* defrag hash bucket is now locked */ - - if (hb->tail == NULL) { - DRLOCK_UNLOCK(hb); - continue; - } - - /* we have a tracker, or more than one */ - cnt += DefragTrackerHashRowTimeout(hb, hb->tail, ts); - DRLOCK_UNLOCK(hb); - } - - return cnt; -} - |