Adding upstream version 1:7.0.3.upstream/1%7.0.3

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 163 insertions, 0 deletions

diff --git a/src/host-timeout.c b/src/host-timeout.c
new file mode 100644
index 0000000..8542d5f
--- /dev/null
+++ b/src/host-timeout.c
@@ -0,0 +1,163 @@
+/* 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 "host.h"
+
+#include "detect-engine-tag.h"
+#include "detect-engine-threshold.h"
+
+#include "host-bit.h"
+#include "host-timeout.h"
+
+#include "reputation.h"
+
+uint32_t HostGetSpareCount(void)
+{
+    return HostSpareQueueGetSize();
+}
+
+uint32_t HostGetActiveCount(void)
+{
+    return SC_ATOMIC_GET(host_counter);
+}
+
+/** \internal
+ *  \brief See if we can really discard this host. Check use_cnt reference.
+ *
+ *  \param h host
+ *  \param ts timestamp
+ *
+ *  \retval 0 not timed out just yet
+ *  \retval 1 fully timed out, lets kill it
+ */
+static int HostHostTimedOut(Host *h, SCTime_t ts)
+{
+    int busy = 0;
+
+    /** never prune a host that is used by a packet
+     *  we are currently processing in one of the threads */
+    if (SC_ATOMIC_GET(h->use_cnt) > 0) {
+        return 0;
+    }
+
+    busy |= (h->iprep && SRepHostTimedOut(h) == 0);
+    busy |= (TagHostHasTag(h) && TagTimeoutCheck(h, ts) == 0);
+    busy |= (ThresholdHostHasThreshold(h) && ThresholdHostTimeoutCheck(h, ts) == 0);
+    busy |= (HostHasHostBits(h) && HostBitsTimedoutCheck(h, ts) == 0);
+    SCLogDebug("host %p %s", h, busy ? "still active" : "timed out");
+    return !busy;
+}
+
+/**
+ *  \internal
+ *
+ *  \brief check all hosts in a hash row for timing out
+ *
+ *  \param hb host hash row *LOCKED*
+ *  \param h last host in the hash row
+ *  \param ts timestamp
+ *
+ *  \retval cnt timed out hosts
+ */
+static uint32_t HostHashRowTimeout(HostHashRow *hb, Host *h, SCTime_t ts)
+{
+    uint32_t cnt = 0;
+
+    do {
+        if (SCMutexTrylock(&h->m) != 0) {
+            h = h->hprev;
+            continue;
+        }
+
+        Host *next_host = h->hprev;
+
+        /* check if the host is fully timed out and
+         * ready to be discarded. */
+        if (HostHostTimedOut(h, ts) == 1) {
+            /* remove from the hash */
+            if (h->hprev != NULL)
+                h->hprev->hnext = h->hnext;
+            if (h->hnext != NULL)
+                h->hnext->hprev = h->hprev;
+            if (hb->head == h)
+                hb->head = h->hnext;
+            if (hb->tail == h)
+                hb->tail = h->hprev;
+
+            h->hnext = NULL;
+            h->hprev = NULL;
+
+            HostClearMemory (h);
+
+            /* no one is referring to this host, use_cnt 0, removed from hash
+             * so we can unlock it and move it back to the spare queue. */
+            SCMutexUnlock(&h->m);
+
+            /* move to spare list */
+            HostMoveToSpare(h);
+
+            cnt++;
+        } else {
+            SCMutexUnlock(&h->m);
+        }
+
+        h = next_host;
+    } while (h != NULL);
+
+    return cnt;
+}
+
+/**
+ *  \brief time out hosts from the hash
+ *
+ *  \param ts timestamp
+ *
+ *  \retval cnt number of timed out host
+ */
+uint32_t HostTimeoutHash(SCTime_t ts)
+{
+    uint32_t idx = 0;
+    uint32_t cnt = 0;
+
+    for (idx = 0; idx < host_config.hash_size; idx++) {
+        HostHashRow *hb = &host_hash[idx];
+
+        if (HRLOCK_TRYLOCK(hb) != 0)
+            continue;
+
+        /* host hash bucket is now locked */
+
+        if (hb->tail == NULL) {
+            HRLOCK_UNLOCK(hb);
+            continue;
+        }
+
+        /* we have a host, or more than one */
+        cnt += HostHashRowTimeout(hb, hb->tail, ts);
+        HRLOCK_UNLOCK(hb);
+    }
+
+    return cnt;
+}
+