1 files changed, 65 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..62677279
--- /dev/null
+++ b/release/src/linux/linux/net/ipv4/netfilter/ipt_MACSAVE.c
@@ -0,0 +1,65 @@
+/*
+
+	MACSAVE target
+	Copyright (C) 2006 Jonathan Zarate
+
+	Licensed under GNU GPL v2 or later.
+
+*/
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/if_ether.h>
+
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter_ipv4/ip_conntrack.h>
+#include <linux/netfilter_ipv4/ipt_MACSAVE.h>
+
+static unsigned int target(struct sk_buff **pskb, unsigned int hooknum,
+						   const struct net_device *in, const struct net_device *out,
+						   const void *targinfo, void *userinfo)
+{
+//	const struct ipt_MACSAVE_target_info *info = targinfo;
+	struct sk_buff *skb = *pskb;
+	struct ip_conntrack *ct;
+	enum ip_conntrack_info ctinfo;
+	
+	if ((skb->mac.raw >= skb->head) && ((skb->mac.raw + ETH_HLEN) <= skb->data)) {
+		ct = ip_conntrack_get(skb, &ctinfo);
+		if (ct) {
+			memcpy(ct->macsave, skb->mac.ethernet->h_source, sizeof(ct->macsave));
+		}
+	}
+	return IPT_CONTINUE;
+}
+
+static int checkentry(const char *tablename, const struct ipt_entry *e, void *targinfo,
+					  unsigned int targinfosize, unsigned int hook_mask)
+{
+	if (targinfosize != IPT_ALIGN(sizeof(struct ipt_MACSAVE_target_info))) {
+		printk(KERN_ERR "MACSAVE: Invalid data size\n");
+		return 0;
+	}
+	
+	if (hook_mask & ~((1 << NF_IP_PRE_ROUTING) | (1 << NF_IP_FORWARD) | (1 << NF_IP_LOCAL_IN))) {
+		printk(KERN_ERR "MACSAVE: Valid only in PREROUTING, FORWARD and INPUT\n");
+		return 0;
+	}
+	return 1;
+}
+
+static struct ipt_target macsave_target
+= { { NULL, NULL }, "MACSAVE", target, checkentry, NULL, THIS_MODULE };
+
+static int __init init(void)
+{
+	return ipt_register_target(&macsave_target);
+}
+
+static void __exit fini(void)
+{
+	ipt_unregister_target(&macsave_target);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");