1 files changed, 72 insertions, 0 deletions
diff --git a/kernel/linux2.5/net/bridge/netfilter/ebt_ip.c b/kernel/linux2.5/net/bridge/netfilter/ebt_ip.c
new file mode 100644
index 0000000..5339c11
--- /dev/null
+++ b/kernel/linux2.5/net/bridge/netfilter/ebt_ip.c
@@ -0,0 +1,72 @@
+/*
+ *  ebt_ip
+ *
+ *	Authors:
+ *	Bart De Schuymer <bart.de.schuymer@pandora.be>
+ *
+ *  April, 2002
+ *
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_ip.h>
+#include <linux/ip.h>
+#include <linux/module.h>
+
+static int ebt_filter_ip(const struct sk_buff *skb, const struct net_device *in,
+   const struct net_device *out, const void *data,
+   unsigned int datalen)
+{
+	struct ebt_ip_info *info = (struct ebt_ip_info *)data;
+
+	if (info->bitmask & EBT_IP_TOS &&
+	   FWINV(info->tos != ((*skb).nh.iph)->tos, EBT_IP_TOS))
+		return EBT_NOMATCH;
+	if (info->bitmask & EBT_IP_PROTO && FWINV(info->protocol !=
+	   ((*skb).nh.iph)->protocol, EBT_IP_PROTO))
+		return EBT_NOMATCH;
+	if (info->bitmask & EBT_IP_SOURCE &&
+	   FWINV((((*skb).nh.iph)->saddr & info->smsk) !=
+	   info->saddr, EBT_IP_SOURCE))
+		return EBT_NOMATCH;
+	if ((info->bitmask & EBT_IP_DEST) &&
+	   FWINV((((*skb).nh.iph)->daddr & info->dmsk) !=
+	   info->daddr, EBT_IP_DEST))
+		return EBT_NOMATCH;
+	return EBT_MATCH;
+}
+
+static int ebt_ip_check(const char *tablename, unsigned int hookmask,
+   const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+	struct ebt_ip_info *info = (struct ebt_ip_info *)data;
+
+	if (datalen != sizeof(struct ebt_ip_info))
+		return -EINVAL;
+	if (e->ethproto != __constant_htons(ETH_P_IP) ||
+	   e->invflags & EBT_IPROTO)
+		return -EINVAL;
+	if (info->bitmask & ~EBT_IP_MASK || info->invflags & ~EBT_IP_MASK)
+		return -EINVAL;
+	return 0;
+}
+
+static struct ebt_match filter_ip =
+{
+	{NULL, NULL}, EBT_IP_MATCH, ebt_filter_ip, ebt_ip_check, NULL,
+	THIS_MODULE
+};
+
+static int __init init(void)
+{
+	return ebt_register_match(&filter_ip);
+}
+
+static void __exit fini(void)
+{
+	ebt_unregister_match(&filter_ip);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");