From 4aca87515a5083ae0e31ce3177189fd43b6d05ac Mon Sep 17 00:00:00 2001
From: Andreas Baumann <mail@andreasbaumann.cc>
Date: Sat, 3 Jan 2015 13:58:15 +0100
Subject: patch to Vanilla Tomato 1.28

---
 .../linux/linux/net/ipv4/netfilter/ipt_connmark.c  | 83 ++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 release/src/linux/linux/net/ipv4/netfilter/ipt_connmark.c

(limited to 'release/src/linux/linux/net/ipv4/netfilter/ipt_connmark.c')

diff --git a/release/src/linux/linux/net/ipv4/netfilter/ipt_connmark.c b/release/src/linux/linux/net/ipv4/netfilter/ipt_connmark.c
new file mode 100644
index 00000000..d795a339
--- /dev/null
+++ b/release/src/linux/linux/net/ipv4/netfilter/ipt_connmark.c
@@ -0,0 +1,83 @@
+/* This kernel module matches connection mark values set by the
+ * CONNMARK target
+ *
+ * Copyright (C) 2002,2004 MARA Systems AB <http://www.marasystems.com>
+ * by Henrik Nordstrom <hno@marasystems.com>
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/module.h>
+#include <linux/skbuff.h>
+
+MODULE_AUTHOR("Henrik Nordstrom <hno@marasytems.com>");
+MODULE_DESCRIPTION("IP tables connmark match module");
+MODULE_LICENSE("GPL");
+
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter_ipv4/ipt_connmark.h>
+#include <linux/netfilter_ipv4/ip_conntrack.h>
+
+static int
+match(const struct sk_buff *skb,
+      const struct net_device *in,
+      const struct net_device *out,
+      const void *matchinfo,
+      int offset,
+      const void *hdr,
+      u_int16_t datalen,
+      int *hotdrop)
+{
+	const struct ipt_connmark_info *info = matchinfo;
+	enum ip_conntrack_info ctinfo;
+	struct ip_conntrack *ct = ip_conntrack_get((struct sk_buff *)skb, &ctinfo);
+	if (!ct)
+	    return 0;
+
+	return ((ct->mark & info->mask) == info->mark) ^ info->invert;
+}
+
+static int
+checkentry(const char *tablename,
+	   const struct ipt_ip *ip,
+	   void *matchinfo,
+	   unsigned int matchsize,
+	   unsigned int hook_mask)
+{
+	if (matchsize != IPT_ALIGN(sizeof(struct ipt_connmark_info)))
+		return 0;
+
+	return 1;
+}
+
+static struct ipt_match connmark_match = {
+	.name = "connmark",
+	.match = &match,
+	.checkentry = &checkentry,
+	.me = THIS_MODULE
+};
+
+static int __init init(void)
+{
+	return ipt_register_match(&connmark_match);
+}
+
+static void __exit fini(void)
+{
+	ipt_unregister_match(&connmark_match);
+}
+
+module_init(init);
+module_exit(fini);
-- 
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