Add CacheWriteThrough clause: external cache write through policy. This feature is particularly useful for active-active setup without connection persistency, ie. you cannot know which firewall would filter a packet that belongs to a connection.

1 files changed, 53 insertions, 0 deletions

diff --git a/src/cache_wt.c b/src/cache_wt.c
new file mode 100644
index 0000000..2a9d8e7
--- /dev/null
+++ b/src/cache_wt.c
@@ -0,0 +1,53 @@
+/*
+ * (C) 2007 by Pablo Neira Ayuso <pablo@netfilter.org>
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <stdio.h>
+#include "conntrackd.h"
+#include "us-conntrack.h"
+#include "cache.h"
+
+static void add_update(struct us_conntrack *u)
+{
+	char __ct[nfct_maxsize()];
+	struct nf_conntrack *ct = (struct nf_conntrack *) __ct;
+
+	memcpy(ct, u->ct, nfct_maxsize());
+
+	nl_create_conntrack(ct);
+}
+
+static void writethrough_add(struct us_conntrack *u, void *data)
+{
+	add_update(u);
+}
+
+static void writethrough_update(struct us_conntrack *u, void *data)
+{
+	add_update(u);
+}
+
+static void writethrough_destroy(struct us_conntrack *u, void *data)
+{
+	nl_destroy_conntrack(u->ct);
+}
+
+struct cache_feature writethrough_feature = {
+	.add		= writethrough_add,
+	.update		= writethrough_update,
+	.destroy	= writethrough_destroy,
+};