This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / net / netfilter / xt_mac.c

diff --git a/net/netfilter/xt_mac.c b/net/netfilter/xt_mac.c
new file mode 100644 (file)
index 0000000..356290f
--- /dev/null
+++ b/net/netfilter/xt_mac.c
@@ -0,0 +1,86 @@
+/* Kernel module to match MAC address parameters. */
+
+/* (C) 1999-2001 Paul `Rusty' Russell
+ * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/if_ether.h>
+#include <linux/etherdevice.h>
+
+#include <linux/netfilter_ipv4.h>
+#include <linux/netfilter/xt_mac.h>
+#include <linux/netfilter/x_tables.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
+MODULE_DESCRIPTION("iptables mac matching module");
+MODULE_ALIAS("ipt_mac");
+MODULE_ALIAS("ip6t_mac");
+
+static int
+match(const struct sk_buff *skb,
+      const struct net_device *in,
+      const struct net_device *out,
+      const struct xt_match *match,
+      const void *matchinfo,
+      int offset,
+      unsigned int protoff,
+      int *hotdrop)
+{
+    const struct xt_mac_info *info = matchinfo;
+
+    /* Is mac pointer valid? */
+    return (skb->mac.raw >= skb->head
+           && (skb->mac.raw + ETH_HLEN) <= skb->data
+           /* If so, compare... */
+           && ((!compare_ether_addr(eth_hdr(skb)->h_source, info->srcaddr))
+               ^ info->invert));
+}
+
+static struct xt_match mac_match = {
+       .name           = "mac",
+       .match          = match,
+       .matchsize      = sizeof(struct xt_mac_info),
+       .hooks          = (1 << NF_IP_PRE_ROUTING) | (1 << NF_IP_LOCAL_IN) |
+                         (1 << NF_IP_FORWARD),
+       .family         = AF_INET,
+       .me             = THIS_MODULE,
+};
+static struct xt_match mac6_match = {
+       .name           = "mac",
+       .match          = match,
+       .matchsize      = sizeof(struct xt_mac_info),
+       .hooks          = (1 << NF_IP_PRE_ROUTING) | (1 << NF_IP_LOCAL_IN) |
+                         (1 << NF_IP_FORWARD),
+       .family         = AF_INET6,
+       .me             = THIS_MODULE,
+};
+
+static int __init xt_mac_init(void)
+{
+       int ret;
+       ret = xt_register_match(&mac_match);
+       if (ret)
+               return ret;
+
+       ret = xt_register_match(&mac6_match);
+       if (ret)
+               xt_unregister_match(&mac_match);
+
+       return ret;
+}
+
+static void __exit xt_mac_fini(void)
+{
+       xt_unregister_match(&mac_match);
+       xt_unregister_match(&mac6_match);
+}
+
+module_init(xt_mac_init);
+module_exit(xt_mac_fini);