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authorBart De Schuymer <bdschuym@pandora.be>2002-06-01 19:23:47 +0000
committerBart De Schuymer <bdschuym@pandora.be>2002-06-01 19:23:47 +0000
commitd891e9e5bc309d5aeb2ab774c76b34a92085b3e7 (patch)
tree94b68fc1c01f90cad62a171c27007ff317031008 /kernel/linux/net/bridge/netfilter/ebtable_broute.c
Initial revision
Diffstat (limited to 'kernel/linux/net/bridge/netfilter/ebtable_broute.c')
-rw-r--r--kernel/linux/net/bridge/netfilter/ebtable_broute.c80
1 files changed, 80 insertions, 0 deletions
diff --git a/kernel/linux/net/bridge/netfilter/ebtable_broute.c b/kernel/linux/net/bridge/netfilter/ebtable_broute.c
new file mode 100644
index 0000000..ce880a2
--- /dev/null
+++ b/kernel/linux/net/bridge/netfilter/ebtable_broute.c
@@ -0,0 +1,80 @@
+/*
+ * ebtable_broute
+ *
+ * Authors:
+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
+ *
+ * April, 2002
+ *
+ * This table lets you choose between routing and bridging for frames
+ * entering on a bridge enslaved nic. This table is traversed before any
+ * other ebtables table. See net/bridge/br_input.c.
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge.h>
+#include <linux/netdevice.h>
+#include <linux/module.h>
+#include <linux/if_bridge.h>
+#include <linux/brlock.h>
+
+// EBT_ACCEPT means the frame will be bridged
+// EBT_DROP means the frame will be routed
+static struct ebt_entries initial_chain =
+ {0, EBT_ACCEPT, 0};
+
+static struct ebt_replace initial_table =
+{
+ "broute", 1 << NF_BR_BROUTING, 0, sizeof(struct ebt_entries),
+ { [NF_BR_BROUTING]&initial_chain}, {},
+ 0, NULL, (char *)&initial_chain
+};
+
+static int check(const struct ebt_table_info *info, unsigned int valid_hooks)
+{
+ if (valid_hooks & ~(1 << NF_BR_BROUTING))
+ return -EINVAL;
+ return 0;
+}
+
+static struct ebt_table broute_table =
+{
+ {NULL, NULL}, "broute", &initial_table, 1 << NF_BR_BROUTING,
+ RW_LOCK_UNLOCKED, check, NULL
+};
+
+static unsigned int
+ebt_broute (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, &broute_table);
+}
+
+static int __init init(void)
+{
+ int ret;
+
+ ret = ebt_register_table(&broute_table);
+ if (ret < 0)
+ return ret;
+ br_write_lock_bh(BR_NETPROTO_LOCK);
+ // in br_input.c, br_handle_frame() wants to call broute_decision()
+ broute_decision = ebt_broute;
+ br_write_unlock_bh(BR_NETPROTO_LOCK);
+ return ret;
+}
+
+static void __exit fini(void)
+{
+ br_write_lock_bh(BR_NETPROTO_LOCK);
+ broute_decision = NULL;
+ br_write_unlock_bh(BR_NETPROTO_LOCK);
+ ebt_unregister_table(&broute_table);
+}
+
+module_init(init);
+module_exit(fini);
+EXPORT_NO_SYMBOLS;
+MODULE_LICENSE("GPL");