1 files changed, 142 insertions, 0 deletions
diff --git a/src/defrag-queue.c b/src/defrag-queue.c
new file mode 100644
index 0000000..dccff88
--- /dev/null
+++ b/src/defrag-queue.c
@@ -0,0 +1,142 @@
+/* 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>
+ *
+ * Defrag tracker queue handler functions
+ */
+
+#include "suricata-common.h"
+#include "defrag-queue.h"
+#include "util-error.h"
+#include "util-debug.h"
+#include "util-print.h"
+
+DefragTrackerQueue *DefragTrackerQueueInit (DefragTrackerQueue *q)
+{
+    if (q != NULL) {
+        memset(q, 0, sizeof(DefragTrackerQueue));
+        DQLOCK_INIT(q);
+    }
+    return q;
+}
+
+DefragTrackerQueue *DefragTrackerQueueNew(void)
+{
+    DefragTrackerQueue *q = (DefragTrackerQueue *)SCMalloc(sizeof(DefragTrackerQueue));
+    if (q == NULL) {
+        SCLogError("Fatal error encountered in DefragTrackerQueueNew. Exiting...");
+        exit(EXIT_SUCCESS);
+    }
+    q = DefragTrackerQueueInit(q);
+    return q;
+}
+
+/**
+ *  \brief Destroy a tracker queue
+ *
+ *  \param q the tracker queue to destroy
+ */
+void DefragTrackerQueueDestroy (DefragTrackerQueue *q)
+{
+    DQLOCK_DESTROY(q);
+}
+
+/**
+ *  \brief add a tracker to a queue
+ *
+ *  \param q queue
+ *  \param dt tracker
+ */
+void DefragTrackerEnqueue (DefragTrackerQueue *q, DefragTracker *dt)
+{
+#ifdef DEBUG
+    BUG_ON(q == NULL || dt == NULL);
+#endif
+
+    DQLOCK_LOCK(q);
+
+    /* more trackers in queue */
+    if (q->top != NULL) {
+        dt->lnext = q->top;
+        q->top->lprev = dt;
+        q->top = dt;
+    /* only tracker */
+    } else {
+        q->top = dt;
+        q->bot = dt;
+    }
+    q->len++;
+#ifdef DBG_PERF
+    if (q->len > q->dbg_maxlen)
+        q->dbg_maxlen = q->len;
+#endif /* DBG_PERF */
+    DQLOCK_UNLOCK(q);
+}
+
+/**
+ *  \brief remove a tracker from the queue
+ *
+ *  \param q queue
+ *
+ *  \retval dt tracker or NULL if empty list.
+ */
+DefragTracker *DefragTrackerDequeue (DefragTrackerQueue *q)
+{
+    DQLOCK_LOCK(q);
+
+    DefragTracker *dt = q->bot;
+    if (dt == NULL) {
+        DQLOCK_UNLOCK(q);
+        return NULL;
+    }
+
+    /* more packets in queue */
+    if (q->bot->lprev != NULL) {
+        q->bot = q->bot->lprev;
+        q->bot->lnext = NULL;
+    /* just the one we remove, so now empty */
+    } else {
+        q->top = NULL;
+        q->bot = NULL;
+    }
+
+#ifdef DEBUG
+    BUG_ON(q->len == 0);
+#endif
+    if (q->len > 0)
+        q->len--;
+
+    dt->lnext = NULL;
+    dt->lprev = NULL;
+
+    DQLOCK_UNLOCK(q);
+    return dt;
+}
+
+uint32_t DefragTrackerQueueLen(DefragTrackerQueue *q)
+{
+    uint32_t len;
+    DQLOCK_LOCK(q);
+    len = q->len;
+    DQLOCK_UNLOCK(q);
+    return len;
+}
+