1 files changed, 62 insertions, 0 deletions
diff --git a/release/src/linux/linux/net/ipv4/netfilter/ipt_macsave.c b/release/src/linux/linux/net/ipv4/netfilter/ipt_macsave.c
new file mode 100644
index 00000000..25fa26a4
--- /dev/null
+++ b/release/src/linux/linux/net/ipv4/netfilter/ipt_macsave.c
@@ -0,0 +1,62 @@
+/*
+
+	macsave match
+	Copyright (C) 2006 Jonathan Zarate
+
+	Licensed under GNU GPL v2 or later.
+
+*/
+
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <net/sock.h>
+
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter_ipv4/ip_conntrack.h>
+#include <linux/netfilter_ipv4/ipt_macsave.h>
+
+#define DEBUG	1
+
+#ifdef DEBUG
+#define DLOG			printk
+#else
+#define DLOG(...)	do { } while (0);
+#endif
+
+
+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_macsave_match_info *info = matchinfo;
+	struct ip_conntrack *ct;
+	enum ip_conntrack_info ctinfo;
+
+	ct = ip_conntrack_get((struct sk_buff *)skb, &ctinfo);	// note about cast: ip_conntrack_get() will not modify skb
+	if (ct) return (memcmp(ct->macsave, info->mac, sizeof(ct->macsave)) == 0) ^ info->invert;
+	return info->invert;
+}
+
+static int checkentry(const char *tablename, const struct ipt_ip *ip, void *matchinfo,
+					  unsigned int matchsize, unsigned int hook_mask)
+{
+	return (matchsize == IPT_ALIGN(sizeof(struct ipt_macsave_match_info)));
+}
+
+
+static struct ipt_match macsave_match
+= { { NULL, NULL }, "macsave", &match, &checkentry, NULL, THIS_MODULE };
+
+static int __init init(void)
+{
+	DLOG(KERN_INFO "macsave match init " __DATE__ " " __TIME__ "\n");
+	return ipt_register_match(&macsave_match);
+}
+
+static void __exit fini(void)
+{
+	ipt_unregister_match(&macsave_match);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");