From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@ppc970.osdl.org>
Date: Sat, 16 Apr 2005 15:20:36 -0700
Subject: Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
---
 net/bridge/netfilter/ebtable_filter.c | 123 ++++++++++++++++++++++++++++++++++
 1 file changed, 123 insertions(+)
 create mode 100644 net/bridge/netfilter/ebtable_filter.c

(limited to 'net/bridge/netfilter/ebtable_filter.c')

diff --git a/net/bridge/netfilter/ebtable_filter.c b/net/bridge/netfilter/ebtable_filter.c
new file mode 100644
index 00000000000..c18666e0392
--- /dev/null
+++ b/net/bridge/netfilter/ebtable_filter.c
@@ -0,0 +1,123 @@
+/*
+ *  ebtable_filter
+ *
+ *	Authors:
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *
+ *  April, 2002
+ *
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/module.h>
+
+#define FILTER_VALID_HOOKS ((1 << NF_BR_LOCAL_IN) | (1 << NF_BR_FORWARD) | \
+   (1 << NF_BR_LOCAL_OUT))
+
+static struct ebt_entries initial_chains[] =
+{
+	{
+		.name	= "INPUT",
+		.policy	= EBT_ACCEPT,
+	},
+	{
+		.name	= "FORWARD",
+		.policy	= EBT_ACCEPT,
+	},
+	{
+		.name	= "OUTPUT",
+		.policy	= EBT_ACCEPT,
+	},
+};
+
+static struct ebt_replace initial_table =
+{
+	.name		= "filter",
+	.valid_hooks	= FILTER_VALID_HOOKS,
+	.entries_size	= 3 * sizeof(struct ebt_entries),
+	.hook_entry	= {
+		[NF_BR_LOCAL_IN]	= &initial_chains[0],
+		[NF_BR_FORWARD]		= &initial_chains[1],
+		[NF_BR_LOCAL_OUT]	= &initial_chains[2],
+	},
+	.entries	= (char *)initial_chains,
+};
+
+static int check(const struct ebt_table_info *info, unsigned int valid_hooks)
+{
+	if (valid_hooks & ~FILTER_VALID_HOOKS)
+		return -EINVAL;
+	return 0;
+}
+
+static struct ebt_table frame_filter =
+{ 
+	.name		= "filter",
+	.table		= &initial_table,
+	.valid_hooks	= FILTER_VALID_HOOKS, 
+	.lock		= RW_LOCK_UNLOCKED,
+	.check		= check,
+	.me		= THIS_MODULE,
+};
+
+static unsigned int
+ebt_hook (unsigned int hook, struct sk_buff **pskb, const struct net_device *in,
+   const struct net_device *out, int (*okfn)(struct sk_buff *))
+{
+	return ebt_do_table(hook, pskb, in, out, &frame_filter);
+}
+
+static struct nf_hook_ops ebt_ops_filter[] = {
+	{
+		.hook		= ebt_hook,
+		.owner		= THIS_MODULE,
+		.pf		= PF_BRIDGE,
+		.hooknum	= NF_BR_LOCAL_IN,
+		.priority	= NF_BR_PRI_FILTER_BRIDGED,
+	},
+	{
+		.hook		= ebt_hook,
+		.owner		= THIS_MODULE,
+		.pf		= PF_BRIDGE,
+		.hooknum	= NF_BR_FORWARD,
+		.priority	= NF_BR_PRI_FILTER_BRIDGED,
+	},
+	{
+		.hook		= ebt_hook,
+		.owner		= THIS_MODULE,
+		.pf		= PF_BRIDGE,
+		.hooknum	= NF_BR_LOCAL_OUT,
+		.priority	= NF_BR_PRI_FILTER_OTHER,
+	},
+};
+
+static int __init init(void)
+{
+	int i, j, ret;
+
+	ret = ebt_register_table(&frame_filter);
+	if (ret < 0)
+		return ret;
+	for (i = 0; i < ARRAY_SIZE(ebt_ops_filter); i++)
+		if ((ret = nf_register_hook(&ebt_ops_filter[i])) < 0)
+			goto cleanup;
+	return ret;
+cleanup:
+	for (j = 0; j < i; j++)
+		nf_unregister_hook(&ebt_ops_filter[j]);
+	ebt_unregister_table(&frame_filter);
+	return ret;
+}
+
+static void __exit fini(void)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(ebt_ops_filter); i++)
+		nf_unregister_hook(&ebt_ops_filter[i]);
+	ebt_unregister_table(&frame_filter);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");
-- 
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