1 files changed, 80 insertions, 0 deletions
diff --git a/net/ipv6/netfilter/ip6t_mac.c b/net/ipv6/netfilter/ip6t_mac.c
new file mode 100644
index 00000000000..526d43e3723
--- /dev/null
+++ b/net/ipv6/netfilter/ip6t_mac.c
@@ -0,0 +1,80 @@
+/* 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/netfilter_ipv6/ip6t_mac.h>
+#include <linux/netfilter_ipv6/ip6_tables.h>
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("MAC address matching module for IPv6");
+MODULE_AUTHOR("Netfilter Core Teaam <coreteam@netfilter.org>");
+
+static int
+match(const struct sk_buff *skb,
+      const struct net_device *in,
+      const struct net_device *out,
+      const void *matchinfo,
+      int offset,
+      unsigned int protoff,
+      int *hotdrop)
+{
+    const struct ip6t_mac_info *info = matchinfo;
+
+    /* Is mac pointer valid? */
+    return (skb->mac.raw >= skb->head
+	    && (skb->mac.raw + ETH_HLEN) <= skb->data
+	    /* If so, compare... */
+	    && ((memcmp(eth_hdr(skb)->h_source, info->srcaddr, ETH_ALEN)
+		== 0) ^ info->invert));
+}
+
+static int
+ip6t_mac_checkentry(const char *tablename,
+		   const struct ip6t_ip6 *ip,
+		   void *matchinfo,
+		   unsigned int matchsize,
+		   unsigned int hook_mask)
+{
+	if (hook_mask
+	    & ~((1 << NF_IP6_PRE_ROUTING) | (1 << NF_IP6_LOCAL_IN)
+		| (1 << NF_IP6_FORWARD))) {
+		printk("ip6t_mac: only valid for PRE_ROUTING, LOCAL_IN or"
+		       " FORWARD\n");
+		return 0;
+	}
+
+	if (matchsize != IP6T_ALIGN(sizeof(struct ip6t_mac_info)))
+		return 0;
+
+	return 1;
+}
+
+static struct ip6t_match mac_match = {
+	.name		= "mac",
+	.match		= &match,
+	.checkentry	= &ip6t_mac_checkentry,
+	.me		= THIS_MODULE,
+};
+
+static int __init init(void)
+{
+	return ip6t_register_match(&mac_match);
+}
+
+static void __exit fini(void)
+{
+	ip6t_unregister_match(&mac_match);
+}
+
+module_init(init);
+module_exit(fini);