Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

22 files changed, 4139 insertions, 0 deletions

diff --git a/net/bridge/netfilter/Kconfig b/net/bridge/netfilter/Kconfig
new file mode 100644
index 00000000000..68ccef507b4
--- /dev/null
+++ b/net/bridge/netfilter/Kconfig
@@ -0,0 +1,211 @@
+#
+# Bridge netfilter configuration
+#
+
+menu "Bridge: Netfilter Configuration"
+	depends on BRIDGE && NETFILTER
+
+config BRIDGE_NF_EBTABLES
+	tristate "Ethernet Bridge tables (ebtables) support"
+	help
+	  ebtables is a general, extensible frame/packet identification
+	  framework. Say 'Y' or 'M' here if you want to do Ethernet
+	  filtering/NAT/brouting on the Ethernet bridge.
+#
+# tables
+#
+config BRIDGE_EBT_BROUTE
+	tristate "ebt: broute table support"
+	depends on BRIDGE_NF_EBTABLES
+	help
+	  The ebtables broute table is used to define rules that decide between
+	  bridging and routing frames, giving Linux the functionality of a
+	  brouter. See the man page for ebtables(8) and examples on the ebtables
+	  website.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config BRIDGE_EBT_T_FILTER
+	tristate "ebt: filter table support"
+	depends on BRIDGE_NF_EBTABLES
+	help
+	  The ebtables filter table is used to define frame filtering rules at
+	  local input, forwarding and local output. See the man page for
+	  ebtables(8).
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config BRIDGE_EBT_T_NAT
+	tristate "ebt: nat table support"
+	depends on BRIDGE_NF_EBTABLES
+	help
+	  The ebtables nat table is used to define rules that alter the MAC
+	  source address (MAC SNAT) or the MAC destination address (MAC DNAT).
+	  See the man page for ebtables(8).
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+#
+# matches
+#
+config BRIDGE_EBT_802_3
+	tristate "ebt: 802.3 filter support"
+	depends on BRIDGE_NF_EBTABLES
+	help
+	  This option adds matching support for 802.3 Ethernet frames.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config BRIDGE_EBT_AMONG
+	tristate "ebt: among filter support"
+	depends on BRIDGE_NF_EBTABLES
+	help
+	  This option adds the among match, which allows matching the MAC source
+	  and/or destination address on a list of addresses. Optionally,
+	  MAC/IP address pairs can be matched, f.e. for anti-spoofing rules.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config BRIDGE_EBT_ARP
+	tristate "ebt: ARP filter support"
+	depends on BRIDGE_NF_EBTABLES
+	help
+	  This option adds the ARP match, which allows ARP and RARP header field
+	  filtering.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config BRIDGE_EBT_IP
+	tristate "ebt: IP filter support"
+	depends on BRIDGE_NF_EBTABLES
+	help
+	  This option adds the IP match, which allows basic IP header field
+	  filtering.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config BRIDGE_EBT_LIMIT
+	tristate "ebt: limit match support"
+	depends on BRIDGE_NF_EBTABLES
+	help
+	  This option adds the limit match, which allows you to control
+	  the rate at which a rule can be matched. This match is the
+	  equivalent of the iptables limit match.
+
+	  If you want to compile it as a module, say M here and read
+	  <file:Documentation/kbuild/modules.txt>.  If unsure, say `N'.
+
+config BRIDGE_EBT_MARK
+	tristate "ebt: mark filter support"
+	depends on BRIDGE_NF_EBTABLES
+	help
+	  This option adds the mark match, which allows matching frames based on
+	  the 'nfmark' value in the frame. This can be set by the mark target.
+	  This value is the same as the one used in the iptables mark match and
+	  target.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config BRIDGE_EBT_PKTTYPE
+	tristate "ebt: packet type filter support"
+	depends on BRIDGE_NF_EBTABLES
+	help
+	  This option adds the packet type match, which allows matching on the
+	  type of packet based on its Ethernet "class" (as determined by
+	  the generic networking code): broadcast, multicast,
+	  for this host alone or for another host.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config BRIDGE_EBT_STP
+	tristate "ebt: STP filter support"
+	depends on BRIDGE_NF_EBTABLES
+	help
+	  This option adds the Spanning Tree Protocol match, which
+	  allows STP header field filtering.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config BRIDGE_EBT_VLAN
+	tristate "ebt: 802.1Q VLAN filter support"
+	depends on BRIDGE_NF_EBTABLES
+	help
+	  This option adds the 802.1Q vlan match, which allows the filtering of
+	  802.1Q vlan fields.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+#
+# targets
+#
+config BRIDGE_EBT_ARPREPLY
+	tristate "ebt: arp reply target support"
+	depends on BRIDGE_NF_EBTABLES
+	help
+	  This option adds the arp reply target, which allows
+	  automatically sending arp replies to arp requests.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config BRIDGE_EBT_DNAT
+	tristate "ebt: dnat target support"
+	depends on BRIDGE_NF_EBTABLES
+	help
+	  This option adds the MAC DNAT target, which allows altering the MAC
+	  destination address of frames.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config BRIDGE_EBT_MARK_T
+	tristate "ebt: mark target support"
+	depends on BRIDGE_NF_EBTABLES
+	help
+	  This option adds the mark target, which allows marking frames by
+	  setting the 'nfmark' value in the frame.
+	  This value is the same as the one used in the iptables mark match and
+	  target.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config BRIDGE_EBT_REDIRECT
+	tristate "ebt: redirect target support"
+	depends on BRIDGE_NF_EBTABLES
+	help
+	  This option adds the MAC redirect target, which allows altering the MAC
+	  destination address of a frame to that of the device it arrived on.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config BRIDGE_EBT_SNAT
+	tristate "ebt: snat target support"
+	depends on BRIDGE_NF_EBTABLES
+	help
+	  This option adds the MAC SNAT target, which allows altering the MAC
+	  source address of frames.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+#
+# watchers
+#
+config BRIDGE_EBT_LOG
+	tristate "ebt: log support"
+	depends on BRIDGE_NF_EBTABLES
+	help
+	  This option adds the log watcher, that you can use in any rule
+	  in any ebtables table. It records info about the frame header
+	  to the syslog.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config BRIDGE_EBT_ULOG
+	tristate "ebt: ulog support"
+	depends on BRIDGE_NF_EBTABLES
+	help
+	  This option adds the ulog watcher, that you can use in any rule
+	  in any ebtables table. The packet is passed to a userspace
+	  logging daemon using netlink multicast sockets. This differs
+	  from the log watcher in the sense that the complete packet is
+	  sent to userspace instead of a descriptive text and that
+	  netlink multicast sockets are used instead of the syslog.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+endmenu
diff --git a/net/bridge/netfilter/Makefile b/net/bridge/netfilter/Makefile
new file mode 100644
index 00000000000..8bf6d9f6e9d
--- /dev/null
+++ b/net/bridge/netfilter/Makefile
@@ -0,0 +1,32 @@
+#
+# Makefile for the netfilter modules for Link Layer filtering on a bridge.
+#
+
+obj-$(CONFIG_BRIDGE_NF_EBTABLES) += ebtables.o
+
+# tables
+obj-$(CONFIG_BRIDGE_EBT_BROUTE) += ebtable_broute.o
+obj-$(CONFIG_BRIDGE_EBT_T_FILTER) += ebtable_filter.o
+obj-$(CONFIG_BRIDGE_EBT_T_NAT) += ebtable_nat.o
+
+#matches
+obj-$(CONFIG_BRIDGE_EBT_802_3) += ebt_802_3.o
+obj-$(CONFIG_BRIDGE_EBT_AMONG) += ebt_among.o
+obj-$(CONFIG_BRIDGE_EBT_ARP) += ebt_arp.o
+obj-$(CONFIG_BRIDGE_EBT_IP) += ebt_ip.o
+obj-$(CONFIG_BRIDGE_EBT_LIMIT) += ebt_limit.o
+obj-$(CONFIG_BRIDGE_EBT_MARK) += ebt_mark_m.o
+obj-$(CONFIG_BRIDGE_EBT_PKTTYPE) += ebt_pkttype.o
+obj-$(CONFIG_BRIDGE_EBT_STP) += ebt_stp.o
+obj-$(CONFIG_BRIDGE_EBT_VLAN) += ebt_vlan.o
+
+# targets
+obj-$(CONFIG_BRIDGE_EBT_ARPREPLY) += ebt_arpreply.o
+obj-$(CONFIG_BRIDGE_EBT_MARK_T) += ebt_mark.o
+obj-$(CONFIG_BRIDGE_EBT_DNAT) += ebt_dnat.o
+obj-$(CONFIG_BRIDGE_EBT_REDIRECT) += ebt_redirect.o
+obj-$(CONFIG_BRIDGE_EBT_SNAT) += ebt_snat.o
+
+# watchers
+obj-$(CONFIG_BRIDGE_EBT_LOG) += ebt_log.o
+obj-$(CONFIG_BRIDGE_EBT_LOG) += ebt_ulog.o
diff --git a/net/bridge/netfilter/ebt_802_3.c b/net/bridge/netfilter/ebt_802_3.c
new file mode 100644
index 00000000000..468ebdf4bc1
--- /dev/null
+++ b/net/bridge/netfilter/ebt_802_3.c
@@ -0,0 +1,73 @@
+/*
+ * 802_3
+ *
+ * Author:
+ * Chris Vitale csv@bluetail.com
+ *
+ * May 2003
+ * 
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_802_3.h>
+#include <linux/module.h>
+
+static int ebt_filter_802_3(const struct sk_buff *skb, const struct net_device *in,
+   const struct net_device *out, const void *data, unsigned int datalen)
+{
+	struct ebt_802_3_info *info = (struct ebt_802_3_info *)data;
+	struct ebt_802_3_hdr *hdr = ebt_802_3_hdr(skb);
+	uint16_t type = hdr->llc.ui.ctrl & IS_UI ? hdr->llc.ui.type : hdr->llc.ni.type;
+
+	if (info->bitmask & EBT_802_3_SAP) {
+		if (FWINV(info->sap != hdr->llc.ui.ssap, EBT_802_3_SAP)) 
+				return EBT_NOMATCH;
+		if (FWINV(info->sap != hdr->llc.ui.dsap, EBT_802_3_SAP))
+				return EBT_NOMATCH;
+	}
+
+	if (info->bitmask & EBT_802_3_TYPE) {
+		if (!(hdr->llc.ui.dsap == CHECK_TYPE && hdr->llc.ui.ssap == CHECK_TYPE))
+			return EBT_NOMATCH;
+		if (FWINV(info->type != type, EBT_802_3_TYPE)) 
+			return EBT_NOMATCH;
+	}
+
+	return EBT_MATCH;
+}
+
+static struct ebt_match filter_802_3;
+static int ebt_802_3_check(const char *tablename, unsigned int hookmask,
+   const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+	struct ebt_802_3_info *info = (struct ebt_802_3_info *)data;
+
+	if (datalen < sizeof(struct ebt_802_3_info))
+		return -EINVAL;
+	if (info->bitmask & ~EBT_802_3_MASK || info->invflags & ~EBT_802_3_MASK)
+		return -EINVAL;
+
+	return 0;
+}
+
+static struct ebt_match filter_802_3 =
+{
+	.name		= EBT_802_3_MATCH,
+	.match		= ebt_filter_802_3,
+	.check		= ebt_802_3_check,
+	.me		= THIS_MODULE,
+};
+
+static int __init init(void)
+{
+	return ebt_register_match(&filter_802_3);
+}
+
+static void __exit fini(void)
+{
+	ebt_unregister_match(&filter_802_3);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");
diff --git a/net/bridge/netfilter/ebt_among.c b/net/bridge/netfilter/ebt_among.c
new file mode 100644
index 00000000000..5a1f5e3bff1
--- /dev/null
+++ b/net/bridge/netfilter/ebt_among.c
@@ -0,0 +1,228 @@
+/*
+ *  ebt_among
+ *
+ *	Authors:
+ *	Grzegorz Borowiak <grzes@gnu.univ.gda.pl>
+ *
+ *  August, 2003
+ *
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_among.h>
+#include <linux/ip.h>
+#include <linux/if_arp.h>
+#include <linux/module.h>
+
+static int ebt_mac_wormhash_contains(const struct ebt_mac_wormhash *wh,
+				     const char *mac, uint32_t ip)
+{
+	/* You may be puzzled as to how this code works.
+	 * Some tricks were used, refer to 
+	 * 	include/linux/netfilter_bridge/ebt_among.h
+	 * as there you can find a solution of this mystery.
+	 */
+	const struct ebt_mac_wormhash_tuple *p;
+	int start, limit, i;
+	uint32_t cmp[2] = { 0, 0 };
+	int key = (const unsigned char) mac[5];
+
+	memcpy(((char *) cmp) + 2, mac, 6);
+	start = wh->table[key];
+	limit = wh->table[key + 1];
+	if (ip) {
+		for (i = start; i < limit; i++) {
+			p = &wh->pool[i];
+			if (cmp[1] == p->cmp[1] && cmp[0] == p->cmp[0]) {
+				if (p->ip == 0 || p->ip == ip) {
+					return 1;
+				}
+			}
+		}
+	} else {
+		for (i = start; i < limit; i++) {
+			p = &wh->pool[i];
+			if (cmp[1] == p->cmp[1] && cmp[0] == p->cmp[0]) {
+				if (p->ip == 0) {
+					return 1;
+				}
+			}
+		}
+	}
+	return 0;
+}
+
+static int ebt_mac_wormhash_check_integrity(const struct ebt_mac_wormhash
+					    *wh)
+{
+	int i;
+
+	for (i = 0; i < 256; i++) {
+		if (wh->table[i] > wh->table[i + 1])
+			return -0x100 - i;
+		if (wh->table[i] < 0)
+			return -0x200 - i;
+		if (wh->table[i] > wh->poolsize)
+			return -0x300 - i;
+	}
+	if (wh->table[256] > wh->poolsize)
+		return -0xc00;
+	return 0;
+}
+
+static int get_ip_dst(const struct sk_buff *skb, uint32_t *addr)
+{
+	if (eth_hdr(skb)->h_proto == htons(ETH_P_IP)) {
+		struct iphdr _iph, *ih;
+
+		ih = skb_header_pointer(skb, 0, sizeof(_iph), &_iph);
+		if (ih == NULL)
+			return -1;
+		*addr = ih->daddr;
+	} else if (eth_hdr(skb)->h_proto == htons(ETH_P_ARP)) {
+		struct arphdr _arph, *ah;
+		uint32_t buf, *bp;
+
+		ah = skb_header_pointer(skb, 0, sizeof(_arph), &_arph);
+		if (ah == NULL ||
+		    ah->ar_pln != sizeof(uint32_t) ||
+		    ah->ar_hln != ETH_ALEN)
+			return -1;
+		bp = skb_header_pointer(skb, sizeof(struct arphdr) +
+					2 * ETH_ALEN + sizeof(uint32_t),
+					sizeof(uint32_t), &buf);
+		if (bp == NULL)
+			return -1;
+		*addr = *bp;
+	}
+	return 0;
+}
+
+static int get_ip_src(const struct sk_buff *skb, uint32_t *addr)
+{
+	if (eth_hdr(skb)->h_proto == htons(ETH_P_IP)) {
+		struct iphdr _iph, *ih;
+
+		ih = skb_header_pointer(skb, 0, sizeof(_iph), &_iph);
+		if (ih == NULL)
+			return -1;
+		*addr = ih->saddr;
+	} else if (eth_hdr(skb)->h_proto == htons(ETH_P_ARP)) {
+		struct arphdr _arph, *ah;
+		uint32_t buf, *bp;
+
+		ah = skb_header_pointer(skb, 0, sizeof(_arph), &_arph);
+		if (ah == NULL ||
+		    ah->ar_pln != sizeof(uint32_t) ||
+		    ah->ar_hln != ETH_ALEN)
+			return -1;
+		bp = skb_header_pointer(skb, sizeof(struct arphdr) +
+					ETH_ALEN, sizeof(uint32_t), &buf);
+		if (bp == NULL)
+			return -1;
+		*addr = *bp;
+	}
+	return 0;
+}
+
+static int ebt_filter_among(const struct sk_buff *skb,
+			    const struct net_device *in,
+			    const struct net_device *out, const void *data,
+			    unsigned int datalen)
+{
+	struct ebt_among_info *info = (struct ebt_among_info *) data;
+	const char *dmac, *smac;
+	const struct ebt_mac_wormhash *wh_dst, *wh_src;
+	uint32_t dip = 0, sip = 0;
+
+	wh_dst = ebt_among_wh_dst(info);
+	wh_src = ebt_among_wh_src(info);
+
+	if (wh_src) {
+		smac = eth_hdr(skb)->h_source;
+		if (get_ip_src(skb, &sip))
+			return EBT_NOMATCH;
+		if (!(info->bitmask & EBT_AMONG_SRC_NEG)) {
+			/* we match only if it contains */
+			if (!ebt_mac_wormhash_contains(wh_src, smac, sip))
+				return EBT_NOMATCH;
+		} else {
+			/* we match only if it DOES NOT contain */
+			if (ebt_mac_wormhash_contains(wh_src, smac, sip))
+				return EBT_NOMATCH;
+		}
+	}
+
+	if (wh_dst) {
+		dmac = eth_hdr(skb)->h_dest;
+		if (get_ip_dst(skb, &dip))
+			return EBT_NOMATCH;
+		if (!(info->bitmask & EBT_AMONG_DST_NEG)) {
+			/* we match only if it contains */
+			if (!ebt_mac_wormhash_contains(wh_dst, dmac, dip))
+				return EBT_NOMATCH;
+		} else {
+			/* we match only if it DOES NOT contain */
+			if (ebt_mac_wormhash_contains(wh_dst, dmac, dip))
+				return EBT_NOMATCH;
+		}
+	}
+
+	return EBT_MATCH;
+}
+
+static int ebt_among_check(const char *tablename, unsigned int hookmask,
+			   const struct ebt_entry *e, void *data,
+			   unsigned int datalen)
+{
+	struct ebt_among_info *info = (struct ebt_among_info *) data;
+	int expected_length = sizeof(struct ebt_among_info);
+	const struct ebt_mac_wormhash *wh_dst, *wh_src;
+	int err;
+
+	wh_dst = ebt_among_wh_dst(info);
+	wh_src = ebt_among_wh_src(info);
+	expected_length += ebt_mac_wormhash_size(wh_dst);
+	expected_length += ebt_mac_wormhash_size(wh_src);
+
+	if (datalen != EBT_ALIGN(expected_length)) {
+		printk(KERN_WARNING
+		       "ebtables: among: wrong size: %d"
+		       "against expected %d, rounded to %Zd\n",
+		       datalen, expected_length,
+		       EBT_ALIGN(expected_length));
+		return -EINVAL;
+	}
+	if (wh_dst && (err = ebt_mac_wormhash_check_integrity(wh_dst))) {
+		printk(KERN_WARNING
+		       "ebtables: among: dst integrity fail: %x\n", -err);
+		return -EINVAL;
+	}
+	if (wh_src && (err = ebt_mac_wormhash_check_integrity(wh_src))) {
+		printk(KERN_WARNING
+		       "ebtables: among: src integrity fail: %x\n", -err);
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static struct ebt_match filter_among = {
+	.name		= EBT_AMONG_MATCH, 
+	.match		= ebt_filter_among, 
+	.check		= ebt_among_check,
+	.me		= THIS_MODULE,
+};
+
+static int __init init(void)
+{
+	return ebt_register_match(&filter_among);
+}
+
+static void __exit fini(void)
+{
+	ebt_unregister_match(&filter_among);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");
diff --git a/net/bridge/netfilter/ebt_arp.c b/net/bridge/netfilter/ebt_arp.c
new file mode 100644
index 00000000000..b94c48cb6e4
--- /dev/null
+++ b/net/bridge/netfilter/ebt_arp.c
@@ -0,0 +1,140 @@
+/*
+ *  ebt_arp
+ *
+ *	Authors:
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *	Tim Gardner <timg@tpi.com>
+ *
+ *  April, 2002
+ *
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_arp.h>
+#include <linux/if_arp.h>
+#include <linux/if_ether.h>
+#include <linux/module.h>
+
+static int ebt_filter_arp(const struct sk_buff *skb, const struct net_device *in,
+   const struct net_device *out, const void *data, unsigned int datalen)
+{
+	struct ebt_arp_info *info = (struct ebt_arp_info *)data;
+	struct arphdr _arph, *ah;
+
+	ah = skb_header_pointer(skb, 0, sizeof(_arph), &_arph);
+	if (ah == NULL)
+		return EBT_NOMATCH;
+	if (info->bitmask & EBT_ARP_OPCODE && FWINV(info->opcode !=
+	   ah->ar_op, EBT_ARP_OPCODE))
+		return EBT_NOMATCH;
+	if (info->bitmask & EBT_ARP_HTYPE && FWINV(info->htype !=
+	   ah->ar_hrd, EBT_ARP_HTYPE))
+		return EBT_NOMATCH;
+	if (info->bitmask & EBT_ARP_PTYPE && FWINV(info->ptype !=
+	   ah->ar_pro, EBT_ARP_PTYPE))
+		return EBT_NOMATCH;
+
+	if (info->bitmask & (EBT_ARP_SRC_IP | EBT_ARP_DST_IP)) {
+		uint32_t _addr, *ap;
+
+		/* IPv4 addresses are always 4 bytes */
+		if (ah->ar_pln != sizeof(uint32_t))
+			return EBT_NOMATCH;
+		if (info->bitmask & EBT_ARP_SRC_IP) {
+			ap = skb_header_pointer(skb, sizeof(struct arphdr) +
+						ah->ar_hln, sizeof(_addr),
+						&_addr);
+			if (ap == NULL)
+				return EBT_NOMATCH;
+			if (FWINV(info->saddr != (*ap & info->smsk),
+			   EBT_ARP_SRC_IP))
+				return EBT_NOMATCH;
+		}
+
+		if (info->bitmask & EBT_ARP_DST_IP) {
+			ap = skb_header_pointer(skb, sizeof(struct arphdr) +
+						2*ah->ar_hln+sizeof(uint32_t),
+						sizeof(_addr), &_addr);
+			if (ap == NULL)
+				return EBT_NOMATCH;
+			if (FWINV(info->daddr != (*ap & info->dmsk),
+			   EBT_ARP_DST_IP))
+				return EBT_NOMATCH;
+		}
+	}
+
+	if (info->bitmask & (EBT_ARP_SRC_MAC | EBT_ARP_DST_MAC)) {
+		unsigned char _mac[ETH_ALEN], *mp;
+		uint8_t verdict, i;
+
+		/* MAC addresses are 6 bytes */
+		if (ah->ar_hln != ETH_ALEN)
+			return EBT_NOMATCH;
+		if (info->bitmask & EBT_ARP_SRC_MAC) {
+			mp = skb_header_pointer(skb, sizeof(struct arphdr),
+						sizeof(_mac), &_mac);
+			if (mp == NULL)
+				return EBT_NOMATCH;
+			verdict = 0;
+			for (i = 0; i < 6; i++)
+				verdict |= (mp[i] ^ info->smaddr[i]) &
+				       info->smmsk[i];
+			if (FWINV(verdict != 0, EBT_ARP_SRC_MAC))
+				return EBT_NOMATCH;
+		}
+
+		if (info->bitmask & EBT_ARP_DST_MAC) {
+			mp = skb_header_pointer(skb, sizeof(struct arphdr) +
+						ah->ar_hln + ah->ar_pln,
+						sizeof(_mac), &_mac);
+			if (mp == NULL)
+				return EBT_NOMATCH;
+			verdict = 0;
+			for (i = 0; i < 6; i++)
+				verdict |= (mp[i] ^ info->dmaddr[i]) &
+					info->dmmsk[i];
+			if (FWINV(verdict != 0, EBT_ARP_DST_MAC))
+				return EBT_NOMATCH;
+		}
+	}
+
+	return EBT_MATCH;
+}
+
+static int ebt_arp_check(const char *tablename, unsigned int hookmask,
+   const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+	struct ebt_arp_info *info = (struct ebt_arp_info *)data;
+
+	if (datalen != EBT_ALIGN(sizeof(struct ebt_arp_info)))
+		return -EINVAL;
+	if ((e->ethproto != htons(ETH_P_ARP) &&
+	   e->ethproto != htons(ETH_P_RARP)) ||
+	   e->invflags & EBT_IPROTO)
+		return -EINVAL;
+	if (info->bitmask & ~EBT_ARP_MASK || info->invflags & ~EBT_ARP_MASK)
+		return -EINVAL;
+	return 0;
+}
+
+static struct ebt_match filter_arp =
+{
+	.name		= EBT_ARP_MATCH,
+	.match		= ebt_filter_arp,
+	.check		= ebt_arp_check,
+	.me		= THIS_MODULE,
+};
+
+static int __init init(void)
+{
+	return ebt_register_match(&filter_arp);
+}
+
+static void __exit fini(void)
+{
+	ebt_unregister_match(&filter_arp);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");
diff --git a/net/bridge/netfilter/ebt_arpreply.c b/net/bridge/netfilter/ebt_arpreply.c
new file mode 100644
index 00000000000..b934de90f7c
--- /dev/null
+++ b/net/bridge/netfilter/ebt_arpreply.c
@@ -0,0 +1,97 @@
+/*
+ *  ebt_arpreply
+ *
+ *	Authors:
+ *	Grzegorz Borowiak <grzes@gnu.univ.gda.pl>
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *
+ *  August, 2003
+ *
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_arpreply.h>
+#include <linux/if_arp.h>
+#include <net/arp.h>
+#include <linux/module.h>
+
+static int ebt_target_reply(struct sk_buff **pskb, unsigned int hooknr,
+   const struct net_device *in, const struct net_device *out,
+   const void *data, unsigned int datalen)
+{
+	struct ebt_arpreply_info *info = (struct ebt_arpreply_info *)data;
+	u32 _sip, *siptr, _dip, *diptr;
+	struct arphdr _ah, *ap;
+	unsigned char _sha[ETH_ALEN], *shp;
+	struct sk_buff *skb = *pskb;
+
+	ap = skb_header_pointer(skb, 0, sizeof(_ah), &_ah);
+	if (ap == NULL)
+		return EBT_DROP;
+
+	if (ap->ar_op != htons(ARPOP_REQUEST) ||
+	    ap->ar_hln != ETH_ALEN ||
+	    ap->ar_pro != htons(ETH_P_IP) ||
+	    ap->ar_pln != 4)
+		return EBT_CONTINUE;
+
+	shp = skb_header_pointer(skb, sizeof(_ah), ETH_ALEN, &_sha);
+	if (shp == NULL)
+		return EBT_DROP;
+
+	siptr = skb_header_pointer(skb, sizeof(_ah) + ETH_ALEN,
+				   sizeof(_sip), &_sip);
+	if (siptr == NULL)
+		return EBT_DROP;
+
+	diptr = skb_header_pointer(skb,
+				   sizeof(_ah) + 2 * ETH_ALEN + sizeof(_sip),
+				   sizeof(_dip), &_dip);
+	if (diptr == NULL)
+		return EBT_DROP;
+
+	arp_send(ARPOP_REPLY, ETH_P_ARP, *siptr, (struct net_device *)in,
+	         *diptr, shp, info->mac, shp);
+
+	return info->target;
+}
+
+static int ebt_target_reply_check(const char *tablename, unsigned int hookmask,
+   const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+	struct ebt_arpreply_info *info = (struct ebt_arpreply_info *)data;
+
+	if (datalen != EBT_ALIGN(sizeof(struct ebt_arpreply_info)))
+		return -EINVAL;
+	if (BASE_CHAIN && info->target == EBT_RETURN)
+		return -EINVAL;
+	if (e->ethproto != htons(ETH_P_ARP) ||
+	    e->invflags & EBT_IPROTO)
+		return -EINVAL;
+	CLEAR_BASE_CHAIN_BIT;
+	if (strcmp(tablename, "nat") || hookmask & ~(1 << NF_BR_PRE_ROUTING))
+		return -EINVAL;
+	return 0;
+}
+
+static struct ebt_target reply_target =
+{
+	.name		= EBT_ARPREPLY_TARGET,
+	.target		= ebt_target_reply,
+	.check		= ebt_target_reply_check,
+	.me		= THIS_MODULE,
+};
+
+static int __init init(void)
+{
+	return ebt_register_target(&reply_target);
+}
+
+static void __exit fini(void)
+{
+	ebt_unregister_target(&reply_target);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");
diff --git a/net/bridge/netfilter/ebt_dnat.c b/net/bridge/netfilter/ebt_dnat.c
new file mode 100644
index 00000000000..f5463086c7b
--- /dev/null
+++ b/net/bridge/netfilter/ebt_dnat.c
@@ -0,0 +1,76 @@
+/*
+ *  ebt_dnat
+ *
+ *	Authors:
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *
+ *  June, 2002
+ *
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_nat.h>
+#include <linux/module.h>
+#include <net/sock.h>
+
+static int ebt_target_dnat(struct sk_buff **pskb, unsigned int hooknr,
+   const struct net_device *in, const struct net_device *out,
+   const void *data, unsigned int datalen)
+{
+	struct ebt_nat_info *info = (struct ebt_nat_info *)data;
+
+	if (skb_shared(*pskb) || skb_cloned(*pskb)) {
+		struct sk_buff *nskb;
+
+		nskb = skb_copy(*pskb, GFP_ATOMIC);
+		if (!nskb)
+			return NF_DROP;
+		if ((*pskb)->sk)
+			skb_set_owner_w(nskb, (*pskb)->sk);
+		kfree_skb(*pskb);
+		*pskb = nskb;
+	}
+	memcpy(eth_hdr(*pskb)->h_dest, info->mac, ETH_ALEN);
+	return info->target;
+}
+
+static int ebt_target_dnat_check(const char *tablename, unsigned int hookmask,
+   const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+	struct ebt_nat_info *info = (struct ebt_nat_info *)data;
+
+	if (BASE_CHAIN && info->target == EBT_RETURN)
+		return -EINVAL;
+	CLEAR_BASE_CHAIN_BIT;
+	if ( (strcmp(tablename, "nat") ||
+	   (hookmask & ~((1 << NF_BR_PRE_ROUTING) | (1 << NF_BR_LOCAL_OUT)))) &&
+	   (strcmp(tablename, "broute") || hookmask & ~(1 << NF_BR_BROUTING)) )
+		return -EINVAL;
+	if (datalen != EBT_ALIGN(sizeof(struct ebt_nat_info)))
+		return -EINVAL;
+	if (INVALID_TARGET)
+		return -EINVAL;
+	return 0;
+}
+
+static struct ebt_target dnat =
+{
+	.name		= EBT_DNAT_TARGET,
+	.target		= ebt_target_dnat,
+	.check		= ebt_target_dnat_check,
+	.me		= THIS_MODULE,
+};
+
+static int __init init(void)
+{
+	return ebt_register_target(&dnat);
+}
+
+static void __exit fini(void)
+{
+	ebt_unregister_target(&dnat);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");
diff --git a/net/bridge/netfilter/ebt_ip.c b/net/bridge/netfilter/ebt_ip.c
new file mode 100644
index 00000000000..7323805b972
--- /dev/null
+++ b/net/bridge/netfilter/ebt_ip.c
@@ -0,0 +1,122 @@
+/*
+ *  ebt_ip
+ *
+ *	Authors:
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *
+ *  April, 2002
+ *
+ *  Changes:
+ *    added ip-sport and ip-dport
+ *    Innominate Security Technologies AG <mhopf@innominate.com>
+ *    September, 2002
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_ip.h>
+#include <linux/ip.h>
+#include <linux/in.h>
+#include <linux/module.h>
+
+struct tcpudphdr {
+	uint16_t src;
+	uint16_t dst;
+};
+
+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;
+	struct iphdr _iph, *ih;
+	struct tcpudphdr _ports, *pptr;
+
+	ih = skb_header_pointer(skb, 0, sizeof(_iph), &_iph);
+	if (ih == NULL)
+		return EBT_NOMATCH;
+	if (info->bitmask & EBT_IP_TOS &&
+	   FWINV(info->tos != ih->tos, EBT_IP_TOS))
+		return EBT_NOMATCH;
+	if (info->bitmask & EBT_IP_SOURCE &&
+	   FWINV((ih->saddr & info->smsk) !=
+	   info->saddr, EBT_IP_SOURCE))
+		return EBT_NOMATCH;
+	if ((info->bitmask & EBT_IP_DEST) &&
+	   FWINV((ih->daddr & info->dmsk) !=
+	   info->daddr, EBT_IP_DEST))
+		return EBT_NOMATCH;
+	if (info->bitmask & EBT_IP_PROTO) {
+		if (FWINV(info->protocol != ih->protocol, EBT_IP_PROTO))
+			return EBT_NOMATCH;
+		if (!(info->bitmask & EBT_IP_DPORT) &&
+		    !(info->bitmask & EBT_IP_SPORT))
+			return EBT_MATCH;
+		pptr = skb_header_pointer(skb, ih->ihl*4,
+					  sizeof(_ports), &_ports);
+		if (pptr == NULL)
+			return EBT_NOMATCH;
+		if (info->bitmask & EBT_IP_DPORT) {
+			u32 dst = ntohs(pptr->dst);
+			if (FWINV(dst < info->dport[0] ||
+			          dst > info->dport[1],
+			          EBT_IP_DPORT))
+			return EBT_NOMATCH;
+		}
+		if (info->bitmask & EBT_IP_SPORT) {
+			u32 src = ntohs(pptr->src);
+			if (FWINV(src < info->sport[0] ||
+			          src > info->sport[1],
+			          EBT_IP_SPORT))
+			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 != EBT_ALIGN(sizeof(struct ebt_ip_info)))
+		return -EINVAL;
+	if (e->ethproto != htons(ETH_P_IP) ||
+	   e->invflags & EBT_IPROTO)
+		return -EINVAL;
+	if (info->bitmask & ~EBT_IP_MASK || info->invflags & ~EBT_IP_MASK)
+		return -EINVAL;
+	if (info->bitmask & (EBT_IP_DPORT | EBT_IP_SPORT)) {
+		if (info->invflags & EBT_IP_PROTO)
+			return -EINVAL;
+		if (info->protocol != IPPROTO_TCP &&
+		    info->protocol != IPPROTO_UDP)
+			 return -EINVAL;
+	}
+	if (info->bitmask & EBT_IP_DPORT && info->dport[0] > info->dport[1])
+		return -EINVAL;
+	if (info->bitmask & EBT_IP_SPORT && info->sport[0] > info->sport[1])
+		return -EINVAL;
+	return 0;
+}
+
+static struct ebt_match filter_ip =
+{
+	.name		= EBT_IP_MATCH,
+	.match		= ebt_filter_ip,
+	.check		= ebt_ip_check,
+	.me		= 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");
diff --git a/net/bridge/netfilter/ebt_limit.c b/net/bridge/netfilter/ebt_limit.c
new file mode 100644
index 00000000000..637c8844cd5
--- /dev/null
+++ b/net/bridge/netfilter/ebt_limit.c
@@ -0,0 +1,113 @@
+/*
+ *  ebt_limit
+ *
+ *	Authors:
+ *	Tom Marshall <tommy@home.tig-grr.com>
+ *
+ *	Mostly copied from netfilter's ipt_limit.c, see that file for
+ *	more explanation
+ *
+ *  September, 2003
+ *
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_limit.h>
+#include <linux/module.h>
+
+#include <linux/netdevice.h>
+#include <linux/spinlock.h>
+
+static DEFINE_SPINLOCK(limit_lock);
+
+#define MAX_CPJ (0xFFFFFFFF / (HZ*60*60*24))
+
+#define _POW2_BELOW2(x) ((x)|((x)>>1))
+#define _POW2_BELOW4(x) (_POW2_BELOW2(x)|_POW2_BELOW2((x)>>2))
+#define _POW2_BELOW8(x) (_POW2_BELOW4(x)|_POW2_BELOW4((x)>>4))
+#define _POW2_BELOW16(x) (_POW2_BELOW8(x)|_POW2_BELOW8((x)>>8))
+#define _POW2_BELOW32(x) (_POW2_BELOW16(x)|_POW2_BELOW16((x)>>16))
+#define POW2_BELOW32(x) ((_POW2_BELOW32(x)>>1) + 1)
+
+#define CREDITS_PER_JIFFY POW2_BELOW32(MAX_CPJ)
+
+static int ebt_limit_match(const struct sk_buff *skb,
+   const struct net_device *in, const struct net_device *out,
+   const void *data, unsigned int datalen)
+{
+	struct ebt_limit_info *info = (struct ebt_limit_info *)data;
+	unsigned long now = jiffies;
+
+	spin_lock_bh(&limit_lock);
+	info->credit += (now - xchg(&info->prev, now)) * CREDITS_PER_JIFFY;
+	if (info->credit > info->credit_cap)
+		info->credit = info->credit_cap;
+
+	if (info->credit >= info->cost) {
+		/* We're not limited. */
+		info->credit -= info->cost;
+		spin_unlock_bh(&limit_lock);
+		return EBT_MATCH;
+	}
+
+	spin_unlock_bh(&limit_lock);
+	return EBT_NOMATCH;
+}
+
+/* Precision saver. */
+static u_int32_t
+user2credits(u_int32_t user)
+{
+	/* If multiplying would overflow... */
+	if (user > 0xFFFFFFFF / (HZ*CREDITS_PER_JIFFY))
+		/* Divide first. */
+		return (user / EBT_LIMIT_SCALE) * HZ * CREDITS_PER_JIFFY;
+
+	return (user * HZ * CREDITS_PER_JIFFY) / EBT_LIMIT_SCALE;
+}
+
+static int ebt_limit_check(const char *tablename, unsigned int hookmask,
+   const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+	struct ebt_limit_info *info = (struct ebt_limit_info *)data;
+
+	if (datalen != EBT_ALIGN(sizeof(struct ebt_limit_info)))
+		return -EINVAL;
+
+	/* Check for overflow. */
+	if (info->burst == 0 ||
+	    user2credits(info->avg * info->burst) < user2credits(info->avg)) {
+		printk("Overflow in ebt_limit, try lower: %u/%u\n",
+			info->avg, info->burst);
+		return -EINVAL;
+	}
+
+	/* User avg in seconds * EBT_LIMIT_SCALE: convert to jiffies * 128. */
+	info->prev = jiffies;
+	info->credit = user2credits(info->avg * info->burst);
+	info->credit_cap = user2credits(info->avg * info->burst);
+	info->cost = user2credits(info->avg);
+	return 0;
+}
+
+static struct ebt_match ebt_limit_reg =
+{
+	.name		= EBT_LIMIT_MATCH,
+	.match		= ebt_limit_match,
+	.check		= ebt_limit_check,
+	.me		= THIS_MODULE,
+};
+
+static int __init init(void)
+{
+	return ebt_register_match(&ebt_limit_reg);
+}
+
+static void __exit fini(void)
+{
+	ebt_unregister_match(&ebt_limit_reg);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");
diff --git a/net/bridge/netfilter/ebt_log.c b/net/bridge/netfilter/ebt_log.c
new file mode 100644
index 00000000000..e4ae34b8892
--- /dev/null
+++ b/net/bridge/netfilter/ebt_log.c
@@ -0,0 +1,171 @@
+/*
+ *  ebt_log
+ *
+ *	Authors:
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *
+ *  April, 2002
+ *
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_log.h>
+#include <linux/module.h>
+#include <linux/ip.h>
+#include <linux/if_arp.h>
+#include <linux/spinlock.h>
+
+static DEFINE_SPINLOCK(ebt_log_lock);
+
+static int ebt_log_check(const char *tablename, unsigned int hookmask,
+   const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+	struct ebt_log_info *info = (struct ebt_log_info *)data;
+
+	if (datalen != EBT_ALIGN(sizeof(struct ebt_log_info)))
+		return -EINVAL;
+	if (info->bitmask & ~EBT_LOG_MASK)
+		return -EINVAL;
+	if (info->loglevel >= 8)
+		return -EINVAL;
+	info->prefix[EBT_LOG_PREFIX_SIZE - 1] = '\0';
+	return 0;
+}
+
+struct tcpudphdr
+{
+	uint16_t src;
+	uint16_t dst;
+};
+
+struct arppayload
+{
+	unsigned char mac_src[ETH_ALEN];
+	unsigned char ip_src[4];
+	unsigned char mac_dst[ETH_ALEN];
+	unsigned char ip_dst[4];
+};
+
+static void print_MAC(unsigned char *p)
+{
+	int i;
+
+	for (i = 0; i < ETH_ALEN; i++, p++)
+		printk("%02x%c", *p, i == ETH_ALEN - 1 ? ' ':':');
+}
+
+#define myNIPQUAD(a) a[0], a[1], a[2], a[3]
+static void ebt_log(const struct sk_buff *skb, unsigned int hooknr,
+   const struct net_device *in, const struct net_device *out,
+   const void *data, unsigned int datalen)
+{
+	struct ebt_log_info *info = (struct ebt_log_info *)data;
+	char level_string[4] = "< >";
+	union {struct iphdr iph; struct tcpudphdr ports;
+	       struct arphdr arph; struct arppayload arpp;} u;
+
+	level_string[1] = '0' + info->loglevel;
+	spin_lock_bh(&ebt_log_lock);
+	printk(level_string);
+	printk("%s IN=%s OUT=%s ", info->prefix, in ? in->name : "",
+	   out ? out->name : "");
+
+	printk("MAC source = ");
+	print_MAC(eth_hdr(skb)->h_source);
+	printk("MAC dest = ");
+	print_MAC(eth_hdr(skb)->h_dest);
+
+	printk("proto = 0x%04x", ntohs(eth_hdr(skb)->h_proto));
+
+	if ((info->bitmask & EBT_LOG_IP) && eth_hdr(skb)->h_proto ==
+	   htons(ETH_P_IP)){
+		struct iphdr _iph, *ih;
+
+		ih = skb_header_pointer(skb, 0, sizeof(_iph), &_iph);
+		if (ih == NULL) {
+			printk(" INCOMPLETE IP header");
+			goto out;
+		}
+		printk(" IP SRC=%u.%u.%u.%u IP DST=%u.%u.%u.%u,",
+		   NIPQUAD(ih->saddr), NIPQUAD(ih->daddr));
+		printk(" IP tos=0x%02X, IP proto=%d", u.iph.tos,
+		       ih->protocol);
+		if (ih->protocol == IPPROTO_TCP ||
+		    ih->protocol == IPPROTO_UDP) {
+			struct tcpudphdr _ports, *pptr;
+
+			pptr = skb_header_pointer(skb, ih->ihl*4,
+						  sizeof(_ports), &_ports);
+			if (pptr == NULL) {
+				printk(" INCOMPLETE TCP/UDP header");
+				goto out;
+			}
+			printk(" SPT=%u DPT=%u", ntohs(pptr->src),
+			   ntohs(pptr->dst));
+		}
+		goto out;
+	}
+
+	if ((info->bitmask & EBT_LOG_ARP) &&
+	    ((eth_hdr(skb)->h_proto == htons(ETH_P_ARP)) ||
+	     (eth_hdr(skb)->h_proto == htons(ETH_P_RARP)))) {
+		struct arphdr _arph, *ah;
+
+		ah = skb_header_pointer(skb, 0, sizeof(_arph), &_arph);
+		if (ah == NULL) {
+			printk(" INCOMPLETE ARP header");
+			goto out;
+		}
+		printk(" ARP HTYPE=%d, PTYPE=0x%04x, OPCODE=%d",
+		       ntohs(ah->ar_hrd), ntohs(ah->ar_pro),
+		       ntohs(ah->ar_op));
+
+		/* If it's for Ethernet and the lengths are OK,
+		 * then log the ARP payload */
+		if (ah->ar_hrd == htons(1) &&
+		    ah->ar_hln == ETH_ALEN &&
+		    ah->ar_pln == sizeof(uint32_t)) {
+			struct arppayload _arpp, *ap;
+
+			ap = skb_header_pointer(skb, sizeof(u.arph),
+						sizeof(_arpp), &_arpp);
+			if (ap == NULL) {
+				printk(" INCOMPLETE ARP payload");
+				goto out;
+			}
+			printk(" ARP MAC SRC=");
+			print_MAC(ap->mac_src);
+			printk(" ARP IP SRC=%u.%u.%u.%u",
+			       myNIPQUAD(ap->ip_src));
+			printk(" ARP MAC DST=");
+			print_MAC(ap->mac_dst);
+			printk(" ARP IP DST=%u.%u.%u.%u",
+			       myNIPQUAD(ap->ip_dst));
+		}
+	}
+out:
+	printk("\n");
+	spin_unlock_bh(&ebt_log_lock);
+}
+
+static struct ebt_watcher log =
+{
+	.name		= EBT_LOG_WATCHER,
+	.watcher	= ebt_log,
+	.check		= ebt_log_check,
+	.me		= THIS_MODULE,
+};
+
+static int __init init(void)
+{
+	return ebt_register_watcher(&log);
+}
+
+static void __exit fini(void)
+{
+	ebt_unregister_watcher(&log);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");
diff --git a/net/bridge/netfilter/ebt_mark.c b/net/bridge/netfilter/ebt_mark.c
new file mode 100644
index 00000000000..02c632b4d32
--- /dev/null
+++ b/net/bridge/netfilter/ebt_mark.c
@@ -0,0 +1,68 @@
+/*
+ *  ebt_mark
+ *
+ *	Authors:
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *
+ *  July, 2002
+ *
+ */
+
+/* The mark target can be used in any chain,
+ * I believe adding a mangle table just for marking is total overkill.
+ * Marking a frame doesn't really change anything in the frame anyway.
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_mark_t.h>
+#include <linux/module.h>
+
+static int ebt_target_mark(struct sk_buff **pskb, unsigned int hooknr,
+   const struct net_device *in, const struct net_device *out,
+   const void *data, unsigned int datalen)
+{
+	struct ebt_mark_t_info *info = (struct ebt_mark_t_info *)data;
+
+	if ((*pskb)->nfmark != info->mark) {
+		(*pskb)->nfmark = info->mark;
+		(*pskb)->nfcache |= NFC_ALTERED;
+	}
+	return info->target;
+}
+
+static int ebt_target_mark_check(const char *tablename, unsigned int hookmask,
+   const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+	struct ebt_mark_t_info *info = (struct ebt_mark_t_info *)data;
+
+	if (datalen != EBT_ALIGN(sizeof(struct ebt_mark_t_info)))
+		return -EINVAL;
+	if (BASE_CHAIN && info->target == EBT_RETURN)
+		return -EINVAL;
+	CLEAR_BASE_CHAIN_BIT;
+	if (INVALID_TARGET)
+		return -EINVAL;
+	return 0;
+}
+
+static struct ebt_target mark_target =
+{
+	.name		= EBT_MARK_TARGET,
+	.target		= ebt_target_mark,
+	.check		= ebt_target_mark_check,
+	.me		= THIS_MODULE,
+};
+
+static int __init init(void)
+{
+	return ebt_register_target(&mark_target);
+}
+
+static void __exit fini(void)
+{
+	ebt_unregister_target(&mark_target);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");
diff --git a/net/bridge/netfilter/ebt_mark_m.c b/net/bridge/netfilter/ebt_mark_m.c
new file mode 100644
index 00000000000..625102de149
--- /dev/null
+++ b/net/bridge/netfilter/ebt_mark_m.c
@@ -0,0 +1,62 @@
+/*
+ *  ebt_mark_m
+ *
+ *	Authors:
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *
+ *  July, 2002
+ *
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_mark_m.h>
+#include <linux/module.h>
+
+static int ebt_filter_mark(const struct sk_buff *skb,
+   const struct net_device *in, const struct net_device *out, const void *data,
+   unsigned int datalen)
+{
+	struct ebt_mark_m_info *info = (struct ebt_mark_m_info *) data;
+
+	if (info->bitmask & EBT_MARK_OR)
+		return !(!!(skb->nfmark & info->mask) ^ info->invert);
+	return !(((skb->nfmark & info->mask) == info->mark) ^ info->invert);
+}
+
+static int ebt_mark_check(const char *tablename, unsigned int hookmask,
+   const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+        struct ebt_mark_m_info *info = (struct ebt_mark_m_info *) data;
+
+	if (datalen != EBT_ALIGN(sizeof(struct ebt_mark_m_info)))
+		return -EINVAL;
+	if (info->bitmask & ~EBT_MARK_MASK)
+		return -EINVAL;
+	if ((info->bitmask & EBT_MARK_OR) && (info->bitmask & EBT_MARK_AND))
+		return -EINVAL;
+	if (!info->bitmask)
+		return -EINVAL;
+	return 0;
+}
+
+static struct ebt_match filter_mark =
+{
+	.name		= EBT_MARK_MATCH,
+	.match		= ebt_filter_mark,
+	.check		= ebt_mark_check,
+	.me		= THIS_MODULE,
+};
+
+static int __init init(void)
+{
+	return ebt_register_match(&filter_mark);
+}
+
+static void __exit fini(void)
+{
+	ebt_unregister_match(&filter_mark);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");
diff --git a/net/bridge/netfilter/ebt_pkttype.c b/net/bridge/netfilter/ebt_pkttype.c
new file mode 100644
index 00000000000..ecd3b42b19b
--- /dev/null
+++ b/net/bridge/netfilter/ebt_pkttype.c
@@ -0,0 +1,59 @@
+/*
+ *  ebt_pkttype
+ *
+ *	Authors:
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *
+ *  April, 2003
+ *
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_pkttype.h>
+#include <linux/module.h>
+
+static int ebt_filter_pkttype(const struct sk_buff *skb,
+   const struct net_device *in,
+   const struct net_device *out,
+   const void *data,
+   unsigned int datalen)
+{
+	struct ebt_pkttype_info *info = (struct ebt_pkttype_info *)data;
+
+	return (skb->pkt_type != info->pkt_type) ^ info->invert;
+}
+
+static int ebt_pkttype_check(const char *tablename, unsigned int hookmask,
+   const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+	struct ebt_pkttype_info *info = (struct ebt_pkttype_info *)data;
+
+	if (datalen != EBT_ALIGN(sizeof(struct ebt_pkttype_info)))
+		return -EINVAL;
+	if (info->invert != 0 && info->invert != 1)
+		return -EINVAL;
+	/* Allow any pkt_type value */
+	return 0;
+}
+
+static struct ebt_match filter_pkttype =
+{
+	.name		= EBT_PKTTYPE_MATCH,
+	.match		= ebt_filter_pkttype,
+	.check		= ebt_pkttype_check,
+	.me		= THIS_MODULE,
+};
+
+static int __init init(void)
+{
+	return ebt_register_match(&filter_pkttype);
+}
+
+static void __exit fini(void)
+{
+	ebt_unregister_match(&filter_pkttype);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");
diff --git a/net/bridge/netfilter/ebt_redirect.c b/net/bridge/netfilter/ebt_redirect.c
new file mode 100644
index 00000000000..1538b438666
--- /dev/null
+++ b/net/bridge/netfilter/ebt_redirect.c
@@ -0,0 +1,81 @@
+/*
+ *  ebt_redirect
+ *
+ *	Authors:
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *
+ *  April, 2002
+ *
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_redirect.h>
+#include <linux/module.h>
+#include <net/sock.h>
+#include "../br_private.h"
+
+static int ebt_target_redirect(struct sk_buff **pskb, unsigned int hooknr,
+   const struct net_device *in, const struct net_device *out,
+   const void *data, unsigned int datalen)
+{
+	struct ebt_redirect_info *info = (struct ebt_redirect_info *)data;
+
+	if (skb_shared(*pskb) || skb_cloned(*pskb)) {
+		struct sk_buff *nskb;
+
+		nskb = skb_copy(*pskb, GFP_ATOMIC);
+		if (!nskb)
+			return NF_DROP;
+		if ((*pskb)->sk)
+			skb_set_owner_w(nskb, (*pskb)->sk);
+		kfree_skb(*pskb);
+		*pskb = nskb;
+	}
+	if (hooknr != NF_BR_BROUTING)
+		memcpy(eth_hdr(*pskb)->h_dest,
+		       in->br_port->br->dev->dev_addr, ETH_ALEN);
+	else
+		memcpy(eth_hdr(*pskb)->h_dest, in->dev_addr, ETH_ALEN);
+	(*pskb)->pkt_type = PACKET_HOST;
+	return info->target;
+}
+
+static int ebt_target_redirect_check(const char *tablename, unsigned int hookmask,
+   const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+	struct ebt_redirect_info *info = (struct ebt_redirect_info *)data;
+
+	if (datalen != EBT_ALIGN(sizeof(struct ebt_redirect_info)))
+		return -EINVAL;
+	if (BASE_CHAIN && info->target == EBT_RETURN)
+		return -EINVAL;
+	CLEAR_BASE_CHAIN_BIT;
+	if ( (strcmp(tablename, "nat") || hookmask & ~(1 << NF_BR_PRE_ROUTING)) &&
+	     (strcmp(tablename, "broute") || hookmask & ~(1 << NF_BR_BROUTING)) )
+		return -EINVAL;
+	if (INVALID_TARGET)
+		return -EINVAL;
+	return 0;
+}
+
+static struct ebt_target redirect_target =
+{
+	.name		= EBT_REDIRECT_TARGET,
+	.target		= ebt_target_redirect,
+	.check		= ebt_target_redirect_check,
+	.me		= THIS_MODULE,
+};
+
+static int __init init(void)
+{
+	return ebt_register_target(&redirect_target);
+}
+
+static void __exit fini(void)
+{
+	ebt_unregister_target(&redirect_target);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");
diff --git a/net/bridge/netfilter/ebt_snat.c b/net/bridge/netfilter/ebt_snat.c
new file mode 100644
index 00000000000..1529bdcb9a4
--- /dev/null
+++ b/net/bridge/netfilter/ebt_snat.c
@@ -0,0 +1,76 @@
+/*
+ *  ebt_snat
+ *
+ *	Authors:
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *
+ *  June, 2002
+ *
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_nat.h>
+#include <linux/module.h>
+#include <net/sock.h>
+
+static int ebt_target_snat(struct sk_buff **pskb, unsigned int hooknr,
+   const struct net_device *in, const struct net_device *out,
+   const void *data, unsigned int datalen)
+{
+	struct ebt_nat_info *info = (struct ebt_nat_info *) data;
+
+	if (skb_shared(*pskb) || skb_cloned(*pskb)) {
+		struct sk_buff *nskb;
+
+		nskb = skb_copy(*pskb, GFP_ATOMIC);
+		if (!nskb)
+			return NF_DROP;
+		if ((*pskb)->sk)
+			skb_set_owner_w(nskb, (*pskb)->sk);
+		kfree_skb(*pskb);
+		*pskb = nskb;
+	}
+	memcpy(eth_hdr(*pskb)->h_source, info->mac, ETH_ALEN);
+	return info->target;
+}
+
+static int ebt_target_snat_check(const char *tablename, unsigned int hookmask,
+   const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+	struct ebt_nat_info *info = (struct ebt_nat_info *) data;
+
+	if (datalen != EBT_ALIGN(sizeof(struct ebt_nat_info)))
+		return -EINVAL;
+	if (BASE_CHAIN && info->target == EBT_RETURN)
+		return -EINVAL;
+	CLEAR_BASE_CHAIN_BIT;
+	if (strcmp(tablename, "nat"))
+		return -EINVAL;
+	if (hookmask & ~(1 << NF_BR_POST_ROUTING))
+		return -EINVAL;
+	if (INVALID_TARGET)
+		return -EINVAL;
+	return 0;
+}
+
+static struct ebt_target snat =
+{
+	.name		= EBT_SNAT_TARGET,
+	.target		= ebt_target_snat,
+	.check		= ebt_target_snat_check,
+	.me		= THIS_MODULE,
+};
+
+static int __init init(void)
+{
+	return ebt_register_target(&snat);
+}
+
+static void __exit fini(void)
+{
+	ebt_unregister_target(&snat);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");
diff --git a/net/bridge/netfilter/ebt_stp.c b/net/bridge/netfilter/ebt_stp.c
new file mode 100644
index 00000000000..f8a8cdec16e
--- /dev/null
+++ b/net/bridge/netfilter/ebt_stp.c
@@ -0,0 +1,194 @@
+/*
+ *  ebt_stp
+ *
+ *	Authors:
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *	Stephen Hemminger <shemminger@osdl.org>
+ *
+ *  July, 2003
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_stp.h>
+#include <linux/module.h>
+
+#define BPDU_TYPE_CONFIG 0
+#define BPDU_TYPE_TCN 0x80
+
+struct stp_header {
+	uint8_t dsap;
+	uint8_t ssap;
+	uint8_t ctrl;
+	uint8_t pid;
+	uint8_t vers;
+	uint8_t type;
+};
+
+struct stp_config_pdu {
+	uint8_t flags;
+	uint8_t root[8];
+	uint8_t root_cost[4];
+	uint8_t sender[8];
+	uint8_t port[2];
+	uint8_t msg_age[2];
+	uint8_t max_age[2];
+	uint8_t hello_time[2];
+	uint8_t forward_delay[2];
+};
+
+#define NR16(p) (p[0] << 8 | p[1])
+#define NR32(p) ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3])
+
+static int ebt_filter_config(struct ebt_stp_info *info,
+   struct stp_config_pdu *stpc)
+{
+	struct ebt_stp_config_info *c;
+	uint16_t v16;
+	uint32_t v32;
+	int verdict, i;
+
+	c = &info->config;
+	if ((info->bitmask & EBT_STP_FLAGS) &&
+	    FWINV(c->flags != stpc->flags, EBT_STP_FLAGS))
+		return EBT_NOMATCH;
+	if (info->bitmask & EBT_STP_ROOTPRIO) {
+		v16 = NR16(stpc->root);
+		if (FWINV(v16 < c->root_priol ||
+		    v16 > c->root_priou, EBT_STP_ROOTPRIO))
+			return EBT_NOMATCH;
+	}
+	if (info->bitmask & EBT_STP_ROOTADDR) {
+		verdict = 0;
+		for (i = 0; i < 6; i++)
+			verdict |= (stpc->root[2+i] ^ c->root_addr[i]) &
+			           c->root_addrmsk[i];
+		if (FWINV(verdict != 0, EBT_STP_ROOTADDR))
+			return EBT_NOMATCH;
+	}
+	if (info->bitmask & EBT_STP_ROOTCOST) {
+		v32 = NR32(stpc->root_cost);
+		if (FWINV(v32 < c->root_costl ||
+		    v32 > c->root_costu, EBT_STP_ROOTCOST))
+			return EBT_NOMATCH;
+	}
+	if (info->bitmask & EBT_STP_SENDERPRIO) {
+		v16 = NR16(stpc->sender);
+		if (FWINV(v16 < c->sender_priol ||
+		    v16 > c->sender_priou, EBT_STP_SENDERPRIO))
+			return EBT_NOMATCH;
+	}
+	if (info->bitmask & EBT_STP_SENDERADDR) {
+		verdict = 0;
+		for (i = 0; i < 6; i++)
+			verdict |= (stpc->sender[2+i] ^ c->sender_addr[i]) &
+			           c->sender_addrmsk[i];
+		if (FWINV(verdict != 0, EBT_STP_SENDERADDR))
+			return EBT_NOMATCH;
+	}
+	if (info->bitmask & EBT_STP_PORT) {
+		v16 = NR16(stpc->port);
+		if (FWINV(v16 < c->portl ||
+		    v16 > c->portu, EBT_STP_PORT))
+			return EBT_NOMATCH;
+	}
+	if (info->bitmask & EBT_STP_MSGAGE) {
+		v16 = NR16(stpc->msg_age);
+		if (FWINV(v16 < c->msg_agel ||
+		    v16 > c->msg_ageu, EBT_STP_MSGAGE))
+			return EBT_NOMATCH;
+	}
+	if (info->bitmask & EBT_STP_MAXAGE) {
+		v16 = NR16(stpc->max_age);
+		if (FWINV(v16 < c->max_agel ||
+		    v16 > c->max_ageu, EBT_STP_MAXAGE))
+			return EBT_NOMATCH;
+	}
+	if (info->bitmask & EBT_STP_HELLOTIME) {
+		v16 = NR16(stpc->hello_time);
+		if (FWINV(v16 < c->hello_timel ||
+		    v16 > c->hello_timeu, EBT_STP_HELLOTIME))
+			return EBT_NOMATCH;
+	}
+	if (info->bitmask & EBT_STP_FWDD) {
+		v16 = NR16(stpc->forward_delay);
+		if (FWINV(v16 < c->forward_delayl ||
+		    v16 > c->forward_delayu, EBT_STP_FWDD))
+			return EBT_NOMATCH;
+	}
+	return EBT_MATCH;
+}
+
+static int ebt_filter_stp(const struct sk_buff *skb, const struct net_device *in,
+   const struct net_device *out, const void *data, unsigned int datalen)
+{
+	struct ebt_stp_info *info = (struct ebt_stp_info *)data;
+	struct stp_header _stph, *sp;
+	uint8_t header[6] = {0x42, 0x42, 0x03, 0x00, 0x00, 0x00};
+
+	sp = skb_header_pointer(skb, 0, sizeof(_stph), &_stph);
+	if (sp == NULL)
+		return EBT_NOMATCH;
+
+	/* The stp code only considers these */
+	if (memcmp(sp, header, sizeof(header)))
+		return EBT_NOMATCH;
+
+	if (info->bitmask & EBT_STP_TYPE
+	    && FWINV(info->type != sp->type, EBT_STP_TYPE))
+		return EBT_NOMATCH;
+
+	if (sp->type == BPDU_TYPE_CONFIG &&
+	    info->bitmask & EBT_STP_CONFIG_MASK) {
+		struct stp_config_pdu _stpc, *st;
+
+		st = skb_header_pointer(skb, sizeof(_stph),
+					sizeof(_stpc), &_stpc);
+		if (st == NULL)
+			return EBT_NOMATCH;
+		return ebt_filter_config(info, st);
+	}
+	return EBT_MATCH;
+}
+
+static int ebt_stp_check(const char *tablename, unsigned int hookmask,
+   const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+	struct ebt_stp_info *info = (struct ebt_stp_info *)data;
+	int len = EBT_ALIGN(sizeof(struct ebt_stp_info));
+	uint8_t bridge_ula[6] = { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x00 };
+	uint8_t msk[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
+
+	if (info->bitmask & ~EBT_STP_MASK || info->invflags & ~EBT_STP_MASK ||
+	    !(info->bitmask & EBT_STP_MASK))
+		return -EINVAL;
+	if (datalen != len)
+		return -EINVAL;
+	/* Make sure the match only receives stp frames */
+	if (memcmp(e->destmac, bridge_ula, ETH_ALEN) ||
+	    memcmp(e->destmsk, msk, ETH_ALEN) || !(e->bitmask & EBT_DESTMAC))
+		return -EINVAL;
+
+	return 0;
+}
+
+static struct ebt_match filter_stp =
+{
+	.name		= EBT_STP_MATCH,
+	.match		= ebt_filter_stp,
+	.check		= ebt_stp_check,
+	.me		= THIS_MODULE,
+};
+
+static int __init init(void)
+{
+	return ebt_register_match(&filter_stp);
+}
+
+static void __exit fini(void)
+{
+	ebt_unregister_match(&filter_stp);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");
diff --git a/net/bridge/netfilter/ebt_ulog.c b/net/bridge/netfilter/ebt_ulog.c
new file mode 100644
index 00000000000..01af4fcef26
--- /dev/null
+++ b/net/bridge/netfilter/ebt_ulog.c
@@ -0,0 +1,295 @@
+/*
+ * netfilter module for userspace bridged Ethernet frames logging daemons
+ *
+ *	Authors:
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *
+ *  November, 2004
+ *
+ * Based on ipt_ULOG.c, which is
+ * (C) 2000-2002 by Harald Welte <laforge@netfilter.org>
+ *
+ * This module accepts two parameters: 
+ * 
+ * nlbufsiz:
+ *   The parameter specifies how big the buffer for each netlink multicast
+ * group is. e.g. If you say nlbufsiz=8192, up to eight kb of packets will
+ * get accumulated in the kernel until they are sent to userspace. It is
+ * NOT possible to allocate more than 128kB, and it is strongly discouraged,
+ * because atomically allocating 128kB inside the network rx softirq is not
+ * reliable. Please also keep in mind that this buffer size is allocated for
+ * each nlgroup you are using, so the total kernel memory usage increases
+ * by that factor.
+ *
+ * flushtimeout:
+ *   Specify, after how many hundredths of a second the queue should be
+ *   flushed even if it is not full yet.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/config.h>
+#include <linux/spinlock.h>
+#include <linux/socket.h>
+#include <linux/skbuff.h>
+#include <linux/kernel.h>
+#include <linux/timer.h>
+#include <linux/netlink.h>
+#include <linux/netdevice.h>
+#include <linux/module.h>
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_ulog.h>
+#include <net/sock.h>
+#include "../br_private.h"
+
+#define PRINTR(format, args...) do { if (net_ratelimit()) \
+                                printk(format , ## args); } while (0)
+
+static unsigned int nlbufsiz = 4096;
+module_param(nlbufsiz, uint, 0600);
+MODULE_PARM_DESC(nlbufsiz, "netlink buffer size (number of bytes) "
+                           "(defaults to 4096)");
+
+static unsigned int flushtimeout = 10;
+module_param(flushtimeout, uint, 0600);
+MODULE_PARM_DESC(flushtimeout, "buffer flush timeout (hundredths ofa second) "
+                               "(defaults to 10)");
+
+typedef struct {
+	unsigned int qlen;		/* number of nlmsgs' in the skb */
+	struct nlmsghdr *lastnlh;	/* netlink header of last msg in skb */
+	struct sk_buff *skb;		/* the pre-allocated skb */
+	struct timer_list timer;	/* the timer function */
+	spinlock_t lock;		/* the per-queue lock */
+} ebt_ulog_buff_t;
+
+static ebt_ulog_buff_t ulog_buffers[EBT_ULOG_MAXNLGROUPS];
+static struct sock *ebtulognl;
+
+/* send one ulog_buff_t to userspace */
+static void ulog_send(unsigned int nlgroup)
+{
+	ebt_ulog_buff_t *ub = &ulog_buffers[nlgroup];
+
+	if (timer_pending(&ub->timer))
+		del_timer(&ub->timer);
+
+	/* last nlmsg needs NLMSG_DONE */
+	if (ub->qlen > 1)
+		ub->lastnlh->nlmsg_type = NLMSG_DONE;
+
+	NETLINK_CB(ub->skb).dst_groups = 1 << nlgroup;
+	netlink_broadcast(ebtulognl, ub->skb, 0, 1 << nlgroup, GFP_ATOMIC);
+
+	ub->qlen = 0;
+	ub->skb = NULL;
+}
+
+/* timer function to flush queue in flushtimeout time */
+static void ulog_timer(unsigned long data)
+{
+	spin_lock_bh(&ulog_buffers[data].lock);
+	if (ulog_buffers[data].skb)
+		ulog_send(data);
+	spin_unlock_bh(&ulog_buffers[data].lock);
+}
+
+static struct sk_buff *ulog_alloc_skb(unsigned int size)
+{
+	struct sk_buff *skb;
+
+	skb = alloc_skb(nlbufsiz, GFP_ATOMIC);
+	if (!skb) {
+		PRINTR(KERN_ERR "ebt_ulog: can't alloc whole buffer "
+		       "of size %ub!\n", nlbufsiz);
+		if (size < nlbufsiz) {
+			/* try to allocate only as much as we need for
+			 * current packet */
+			skb = alloc_skb(size, GFP_ATOMIC);
+			if (!skb)
+				PRINTR(KERN_ERR "ebt_ulog: can't even allocate "
+				       "buffer of size %ub\n", size);
+		}
+	}
+
+	return skb;
+}
+
+static void ebt_ulog(const struct sk_buff *skb, unsigned int hooknr,
+   const struct net_device *in, const struct net_device *out,
+   const void *data, unsigned int datalen)
+{
+	ebt_ulog_packet_msg_t *pm;
+	size_t size, copy_len;
+	struct nlmsghdr *nlh;
+	struct ebt_ulog_info *uloginfo = (struct ebt_ulog_info *)data;
+	unsigned int group = uloginfo->nlgroup;
+	ebt_ulog_buff_t *ub = &ulog_buffers[group];
+	spinlock_t *lock = &ub->lock;
+
+	if ((uloginfo->cprange == 0) ||
+	    (uloginfo->cprange > skb->len + ETH_HLEN))
+		copy_len = skb->len + ETH_HLEN;
+	else
+		copy_len = uloginfo->cprange;
+
+	size = NLMSG_SPACE(sizeof(*pm) + copy_len);
+	if (size > nlbufsiz) {
+		PRINTR("ebt_ulog: Size %Zd needed, but nlbufsiz=%d\n",
+		       size, nlbufsiz);
+		return;
+	}
+
+	spin_lock_bh(lock);
+
+	if (!ub->skb) {
+		if (!(ub->skb = ulog_alloc_skb(size)))
+			goto alloc_failure;
+	} else if (size > skb_tailroom(ub->skb)) {
+		ulog_send(group);
+
+		if (!(ub->skb = ulog_alloc_skb(size)))
+			goto alloc_failure;
+	}
+
+	nlh = NLMSG_PUT(ub->skb, 0, ub->qlen, 0,
+	                size - NLMSG_ALIGN(sizeof(*nlh)));
+	ub->qlen++;
+
+	pm = NLMSG_DATA(nlh);
+
+	/* Fill in the ulog data */
+	pm->version = EBT_ULOG_VERSION;
+	do_gettimeofday(&pm->stamp);
+	if (ub->qlen == 1)
+		ub->skb->stamp = pm->stamp;
+	pm->data_len = copy_len;
+	pm->mark = skb->nfmark;
+	pm->hook = hooknr;
+	if (uloginfo->prefix != NULL)
+		strcpy(pm->prefix, uloginfo->prefix);
+	else
+		*(pm->prefix) = '\0';
+
+	if (in) {
+		strcpy(pm->physindev, in->name);
+		/* If in isn't a bridge, then physindev==indev */
+		if (in->br_port)
+			strcpy(pm->indev, in->br_port->br->dev->name);
+		else
+			strcpy(pm->indev, in->name);
+	} else
+		pm->indev[0] = pm->physindev[0] = '\0';
+
+	if (out) {
+		/* If out exists, then out is a bridge port */
+		strcpy(pm->physoutdev, out->name);
+		strcpy(pm->outdev, out->br_port->br->dev->name);
+	} else
+		pm->outdev[0] = pm->physoutdev[0] = '\0';
+
+	if (skb_copy_bits(skb, -ETH_HLEN, pm->data, copy_len) < 0)
+		BUG();
+
+	if (ub->qlen > 1)
+		ub->lastnlh->nlmsg_flags |= NLM_F_MULTI;
+
+	ub->lastnlh = nlh;
+
+	if (ub->qlen >= uloginfo->qthreshold)
+		ulog_send(group);
+	else if (!timer_pending(&ub->timer)) {
+		ub->timer.expires = jiffies + flushtimeout * HZ / 100;
+		add_timer(&ub->timer);
+	}
+
+unlock:
+	spin_unlock_bh(lock);
+
+	return;
+
+nlmsg_failure:
+	printk(KERN_CRIT "ebt_ulog: error during NLMSG_PUT. This should "
+	       "not happen, please report to author.\n");
+	goto unlock;
+alloc_failure:
+	goto unlock;
+}
+
+static int ebt_ulog_check(const char *tablename, unsigned int hookmask,
+   const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+	struct ebt_ulog_info *uloginfo = (struct ebt_ulog_info *)data;
+
+	if (datalen != EBT_ALIGN(sizeof(struct ebt_ulog_info)) ||
+	    uloginfo->nlgroup > 31)
+		return -EINVAL;
+
+	uloginfo->prefix[EBT_ULOG_PREFIX_LEN - 1] = '\0';
+
+	if (uloginfo->qthreshold > EBT_ULOG_MAX_QLEN)
+		uloginfo->qthreshold = EBT_ULOG_MAX_QLEN;
+
+	return 0;
+}
+
+static struct ebt_watcher ulog = {
+	.name		= EBT_ULOG_WATCHER,
+	.watcher	= ebt_ulog,
+	.check		= ebt_ulog_check,
+	.me		= THIS_MODULE,
+};
+
+static int __init init(void)
+{
+	int i, ret = 0;
+
+	if (nlbufsiz >= 128*1024) {
+		printk(KERN_NOTICE "ebt_ulog: Netlink buffer has to be <= 128kB,"
+		       " please try a smaller nlbufsiz parameter.\n");
+		return -EINVAL;
+	}
+
+	/* initialize ulog_buffers */
+	for (i = 0; i < EBT_ULOG_MAXNLGROUPS; i++) {
+		init_timer(&ulog_buffers[i].timer);
+		ulog_buffers[i].timer.function = ulog_timer;
+		ulog_buffers[i].timer.data = i;
+		spin_lock_init(&ulog_buffers[i].lock);
+	}
+
+	ebtulognl = netlink_kernel_create(NETLINK_NFLOG, NULL);
+	if (!ebtulognl)
+		ret = -ENOMEM;
+	else if ((ret = ebt_register_watcher(&ulog)))
+		sock_release(ebtulognl->sk_socket);
+
+	return ret;
+}
+
+static void __exit fini(void)
+{
+	ebt_ulog_buff_t *ub;
+	int i;
+
+	ebt_unregister_watcher(&ulog);
+	for (i = 0; i < EBT_ULOG_MAXNLGROUPS; i++) {
+		ub = &ulog_buffers[i];
+		if (timer_pending(&ub->timer))
+			del_timer(&ub->timer);
+		spin_lock_bh(&ub->lock);
+		if (ub->skb) {
+			kfree_skb(ub->skb);
+			ub->skb = NULL;
+		}
+		spin_unlock_bh(&ub->lock);
+	}
+	sock_release(ebtulognl->sk_socket);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Bart De Schuymer <bdschuym@pandora.be>");
+MODULE_DESCRIPTION("ebtables userspace logging module for bridged Ethernet"
+                   " frames");
diff --git a/net/bridge/netfilter/ebt_vlan.c b/net/bridge/netfilter/ebt_vlan.c
new file mode 100644
index 00000000000..db60d734908
--- /dev/null
+++ b/net/bridge/netfilter/ebt_vlan.c
@@ -0,0 +1,195 @@
+/*
+ * Description: EBTables 802.1Q match extension kernelspace module.
+ * Authors: Nick Fedchik <nick@fedchik.org.ua>
+ *          Bart De Schuymer <bdschuym@pandora.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_vlan.h>
+
+static int debug;
+#define MODULE_VERS "0.6"
+
+module_param(debug, int, 0);
+MODULE_PARM_DESC(debug, "debug=1 is turn on debug messages");
+MODULE_AUTHOR("Nick Fedchik <nick@fedchik.org.ua>");
+MODULE_DESCRIPTION("802.1Q match module (ebtables extension), v"
+		   MODULE_VERS);
+MODULE_LICENSE("GPL");
+
+
+#define DEBUG_MSG(args...) if (debug) printk (KERN_DEBUG "ebt_vlan: " args)
+#define INV_FLAG(_inv_flag_) (info->invflags & _inv_flag_) ? "!" : ""
+#define GET_BITMASK(_BIT_MASK_) info->bitmask & _BIT_MASK_
+#define SET_BITMASK(_BIT_MASK_) info->bitmask |= _BIT_MASK_
+#define EXIT_ON_MISMATCH(_MATCH_,_MASK_) {if (!((info->_MATCH_ == _MATCH_)^!!(info->invflags & _MASK_))) return EBT_NOMATCH;}
+
+static int
+ebt_filter_vlan(const struct sk_buff *skb,
+		const struct net_device *in,
+		const struct net_device *out,
+		const void *data, unsigned int datalen)
+{
+	struct ebt_vlan_info *info = (struct ebt_vlan_info *) data;
+	struct vlan_hdr _frame, *fp;
+
+	unsigned short TCI;	/* Whole TCI, given from parsed frame */
+	unsigned short id;	/* VLAN ID, given from frame TCI */
+	unsigned char prio;	/* user_priority, given from frame TCI */
+	/* VLAN encapsulated Type/Length field, given from orig frame */
+	unsigned short encap;
+
+	fp = skb_header_pointer(skb, 0, sizeof(_frame), &_frame);
+	if (fp == NULL)
+		return EBT_NOMATCH;
+
+	/* Tag Control Information (TCI) consists of the following elements:
+	 * - User_priority. The user_priority field is three bits in length,
+	 * interpreted as a binary number.
+	 * - Canonical Format Indicator (CFI). The Canonical Format Indicator
+	 * (CFI) is a single bit flag value. Currently ignored.
+	 * - VLAN Identifier (VID). The VID is encoded as
+	 * an unsigned binary number. */
+	TCI = ntohs(fp->h_vlan_TCI);
+	id = TCI & VLAN_VID_MASK;
+	prio = (TCI >> 13) & 0x7;
+	encap = fp->h_vlan_encapsulated_proto;
+
+	/* Checking VLAN Identifier (VID) */
+	if (GET_BITMASK(EBT_VLAN_ID))
+		EXIT_ON_MISMATCH(id, EBT_VLAN_ID);
+
+	/* Checking user_priority */
+	if (GET_BITMASK(EBT_VLAN_PRIO))
+		EXIT_ON_MISMATCH(prio, EBT_VLAN_PRIO);
+
+	/* Checking Encapsulated Proto (Length/Type) field */
+	if (GET_BITMASK(EBT_VLAN_ENCAP))
+		EXIT_ON_MISMATCH(encap, EBT_VLAN_ENCAP);
+
+	return EBT_MATCH;
+}
+
+static int
+ebt_check_vlan(const char *tablename,
+	       unsigned int hooknr,
+	       const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+	struct ebt_vlan_info *info = (struct ebt_vlan_info *) data;
+
+	/* Parameters buffer overflow check */
+	if (datalen != EBT_ALIGN(sizeof(struct ebt_vlan_info))) {
+		DEBUG_MSG
+		    ("passed size %d is not eq to ebt_vlan_info (%Zd)\n",
+		     datalen, sizeof(struct ebt_vlan_info));
+		return -EINVAL;
+	}
+
+	/* Is it 802.1Q frame checked? */
+	if (e->ethproto != htons(ETH_P_8021Q)) {
+		DEBUG_MSG
+		    ("passed entry proto %2.4X is not 802.1Q (8100)\n",
+		     (unsigned short) ntohs(e->ethproto));
+		return -EINVAL;
+	}
+
+	/* Check for bitmask range
+	 * True if even one bit is out of mask */
+	if (info->bitmask & ~EBT_VLAN_MASK) {
+		DEBUG_MSG("bitmask %2X is out of mask (%2X)\n",
+			  info->bitmask, EBT_VLAN_MASK);
+		return -EINVAL;
+	}
+
+	/* Check for inversion flags range */
+	if (info->invflags & ~EBT_VLAN_MASK) {
+		DEBUG_MSG("inversion flags %2X is out of mask (%2X)\n",
+			  info->invflags, EBT_VLAN_MASK);
+		return -EINVAL;
+	}
+
+	/* Reserved VLAN ID (VID) values
+	 * -----------------------------
+	 * 0 - The null VLAN ID. 
+	 * 1 - The default Port VID (PVID)
+	 * 0x0FFF - Reserved for implementation use. 
+	 * if_vlan.h: VLAN_GROUP_ARRAY_LEN 4096. */
+	if (GET_BITMASK(EBT_VLAN_ID)) {
+		if (!!info->id) { /* if id!=0 => check vid range */
+			if (info->id > VLAN_GROUP_ARRAY_LEN) {
+				DEBUG_MSG
+				    ("id %d is out of range (1-4096)\n",
+				     info->id);
+				return -EINVAL;
+			}
+			/* Note: This is valid VLAN-tagged frame point.
+			 * Any value of user_priority are acceptable, 
+			 * but should be ignored according to 802.1Q Std.
+			 * So we just drop the prio flag. */
+			info->bitmask &= ~EBT_VLAN_PRIO;
+		}
+		/* Else, id=0 (null VLAN ID)  => user_priority range (any?) */
+	}
+
+	if (GET_BITMASK(EBT_VLAN_PRIO)) {
+		if ((unsigned char) info->prio > 7) {
+			DEBUG_MSG("prio %d is out of range (0-7)\n",
+			     info->prio);
+			return -EINVAL;
+		}
+	}
+	/* Check for encapsulated proto range - it is possible to be
+	 * any value for u_short range.
+	 * if_ether.h:  ETH_ZLEN        60   -  Min. octets in frame sans FCS */
+	if (GET_BITMASK(EBT_VLAN_ENCAP)) {
+		if ((unsigned short) ntohs(info->encap) < ETH_ZLEN) {
+			DEBUG_MSG
+			    ("encap frame length %d is less than minimal\n",
+			     ntohs(info->encap));
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+static struct ebt_match filter_vlan = {
+	.name		= EBT_VLAN_MATCH,
+	.match		= ebt_filter_vlan,
+	.check		= ebt_check_vlan,
+	.me		= THIS_MODULE,
+};
+
+static int __init init(void)
+{
+	DEBUG_MSG("ebtables 802.1Q extension module v"
+		  MODULE_VERS "\n");
+	DEBUG_MSG("module debug=%d\n", !!debug);
+	return ebt_register_match(&filter_vlan);
+}
+
+static void __exit fini(void)
+{
+	ebt_unregister_match(&filter_vlan);
+}
+
+module_init(init);
+module_exit(fini);
diff --git a/net/bridge/netfilter/ebtable_broute.c b/net/bridge/netfilter/ebtable_broute.c
new file mode 100644
index 00000000000..1767c94cd3d
--- /dev/null
+++ b/net/bridge/netfilter/ebtable_broute.c
@@ -0,0 +1,86 @@
+/*
+ *  ebtable_broute
+ *
+ *	Authors:
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *
+ *  April, 2002
+ *
+ *  This table lets you choose between routing and bridging for frames
+ *  entering on a bridge enslaved nic. This table is traversed before any
+ *  other ebtables table. See net/bridge/br_input.c.
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/module.h>
+#include <linux/if_bridge.h>
+
+/* EBT_ACCEPT means the frame will be bridged
+ * EBT_DROP means the frame will be routed
+ */
+static struct ebt_entries initial_chain = {
+	.name		= "BROUTING",
+	.policy		= EBT_ACCEPT,
+};
+
+static struct ebt_replace initial_table =
+{
+	.name		= "broute",
+	.valid_hooks	= 1 << NF_BR_BROUTING,
+	.entries_size	= sizeof(struct ebt_entries),
+	.hook_entry	= {
+		[NF_BR_BROUTING]	= &initial_chain,
+	},
+	.entries	= (char *)&initial_chain,
+};
+
+static int check(const struct ebt_table_info *info, unsigned int valid_hooks)
+{
+	if (valid_hooks & ~(1 << NF_BR_BROUTING))
+		return -EINVAL;
+	return 0;
+}
+
+static struct ebt_table broute_table =
+{
+	.name		= "broute",
+	.table		= &initial_table,
+	.valid_hooks	= 1 << NF_BR_BROUTING,
+	.lock		= RW_LOCK_UNLOCKED,
+	.check		= check,
+	.me		= THIS_MODULE,
+};
+
+static int ebt_broute(struct sk_buff **pskb)
+{
+	int ret;
+
+	ret = ebt_do_table(NF_BR_BROUTING, pskb, (*pskb)->dev, NULL,
+	   &broute_table);
+	if (ret == NF_DROP)
+		return 1; /* route it */
+	return 0; /* bridge it */
+}
+
+static int __init init(void)
+{
+	int ret;
+
+	ret = ebt_register_table(&broute_table);
+	if (ret < 0)
+		return ret;
+	/* see br_input.c */
+	br_should_route_hook = ebt_broute;
+	return ret;
+}
+
+static void __exit fini(void)
+{
+	br_should_route_hook = NULL;
+	synchronize_net();
+	ebt_unregister_table(&broute_table);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");
diff --git a/net/bridge/netfilter/ebtable_filter.c b/net/bridge/netfilter/ebtable_filter.c
new file mode 100644
index 00000000000..c18666e0392
--- /dev/null
+++ b/net/bridge/netfilter/ebtable_filter.c
@@ -0,0 +1,123 @@
+/*
+ *  ebtable_filter
+ *
+ *	Authors:
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *
+ *  April, 2002
+ *
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/module.h>
+
+#define FILTER_VALID_HOOKS ((1 << NF_BR_LOCAL_IN) | (1 << NF_BR_FORWARD) | \
+   (1 << NF_BR_LOCAL_OUT))
+
+static struct ebt_entries initial_chains[] =
+{
+	{
+		.name	= "INPUT",
+		.policy	= EBT_ACCEPT,
+	},
+	{
+		.name	= "FORWARD",
+		.policy	= EBT_ACCEPT,
+	},
+	{
+		.name	= "OUTPUT",
+		.policy	= EBT_ACCEPT,
+	},
+};
+
+static struct ebt_replace initial_table =
+{
+	.name		= "filter",
+	.valid_hooks	= FILTER_VALID_HOOKS,
+	.entries_size	= 3 * sizeof(struct ebt_entries),
+	.hook_entry	= {
+		[NF_BR_LOCAL_IN]	= &initial_chains[0],
+		[NF_BR_FORWARD]		= &initial_chains[1],
+		[NF_BR_LOCAL_OUT]	= &initial_chains[2],
+	},
+	.entries	= (char *)initial_chains,
+};
+
+static int check(const struct ebt_table_info *info, unsigned int valid_hooks)
+{
+	if (valid_hooks & ~FILTER_VALID_HOOKS)
+		return -EINVAL;
+	return 0;
+}
+
+static struct ebt_table frame_filter =
+{ 
+	.name		= "filter",
+	.table		= &initial_table,
+	.valid_hooks	= FILTER_VALID_HOOKS, 
+	.lock		= RW_LOCK_UNLOCKED,
+	.check		= check,
+	.me		= THIS_MODULE,
+};
+
+static unsigned int
+ebt_hook (unsigned int hook, struct sk_buff **pskb, const struct net_device *in,
+   const struct net_device *out, int (*okfn)(struct sk_buff *))
+{
+	return ebt_do_table(hook, pskb, in, out, &frame_filter);
+}
+
+static struct nf_hook_ops ebt_ops_filter[] = {
+	{
+		.hook		= ebt_hook,
+		.owner		= THIS_MODULE,
+		.pf		= PF_BRIDGE,
+		.hooknum	= NF_BR_LOCAL_IN,
+		.priority	= NF_BR_PRI_FILTER_BRIDGED,
+	},
+	{
+		.hook		= ebt_hook,
+		.owner		= THIS_MODULE,
+		.pf		= PF_BRIDGE,
+		.hooknum	= NF_BR_FORWARD,
+		.priority	= NF_BR_PRI_FILTER_BRIDGED,
+	},
+	{
+		.hook		= ebt_hook,
+		.owner		= THIS_MODULE,
+		.pf		= PF_BRIDGE,
+		.hooknum	= NF_BR_LOCAL_OUT,
+		.priority	= NF_BR_PRI_FILTER_OTHER,
+	},
+};
+
+static int __init init(void)
+{
+	int i, j, ret;
+
+	ret = ebt_register_table(&frame_filter);
+	if (ret < 0)
+		return ret;
+	for (i = 0; i < ARRAY_SIZE(ebt_ops_filter); i++)
+		if ((ret = nf_register_hook(&ebt_ops_filter[i])) < 0)
+			goto cleanup;
+	return ret;
+cleanup:
+	for (j = 0; j < i; j++)
+		nf_unregister_hook(&ebt_ops_filter[j]);
+	ebt_unregister_table(&frame_filter);
+	return ret;
+}
+
+static void __exit fini(void)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(ebt_ops_filter); i++)
+		nf_unregister_hook(&ebt_ops_filter[i]);
+	ebt_unregister_table(&frame_filter);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");
diff --git a/net/bridge/netfilter/ebtable_nat.c b/net/bridge/netfilter/ebtable_nat.c
new file mode 100644
index 00000000000..828cac2cc4a
--- /dev/null
+++ b/net/bridge/netfilter/ebtable_nat.c
@@ -0,0 +1,130 @@
+/*
+ *  ebtable_nat
+ *
+ *	Authors:
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *
+ *  April, 2002
+ *
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/module.h>
+
+#define NAT_VALID_HOOKS ((1 << NF_BR_PRE_ROUTING) | (1 << NF_BR_LOCAL_OUT) | \
+   (1 << NF_BR_POST_ROUTING))
+
+static struct ebt_entries initial_chains[] =
+{
+	{
+		.name	= "PREROUTING",
+		.policy	= EBT_ACCEPT,
+	},
+	{
+		.name	= "OUTPUT",
+		.policy	= EBT_ACCEPT,
+	},
+	{
+		.name	= "POSTROUTING",
+		.policy	= EBT_ACCEPT,
+	}
+};
+
+static struct ebt_replace initial_table =
+{
+	.name		= "nat",
+	.valid_hooks	= NAT_VALID_HOOKS,
+	.entries_size	= 3 * sizeof(struct ebt_entries),
+	.hook_entry	= {
+		[NF_BR_PRE_ROUTING]	= &initial_chains[0],
+		[NF_BR_LOCAL_OUT]	= &initial_chains[1],
+		[NF_BR_POST_ROUTING]	= &initial_chains[2],
+	},
+	.entries	= (char *)initial_chains,
+};
+
+static int check(const struct ebt_table_info *info, unsigned int valid_hooks)
+{
+	if (valid_hooks & ~NAT_VALID_HOOKS)
+		return -EINVAL;
+	return 0;
+}
+
+static struct ebt_table frame_nat =
+{
+	.name		= "nat",
+	.table		= &initial_table,
+	.valid_hooks	= NAT_VALID_HOOKS,
+	.lock		= RW_LOCK_UNLOCKED,
+	.check		= check,
+	.me		= THIS_MODULE,
+};
+
+static unsigned int
+ebt_nat_dst(unsigned int hook, struct sk_buff **pskb, const struct net_device *in
+   , const struct net_device *out, int (*okfn)(struct sk_buff *))
+{
+	return ebt_do_table(hook, pskb, in, out, &frame_nat);
+}
+
+static unsigned int
+ebt_nat_src(unsigned int hook, struct sk_buff **pskb, const struct net_device *in
+   , const struct net_device *out, int (*okfn)(struct sk_buff *))
+{
+	return ebt_do_table(hook, pskb, in, out, &frame_nat);
+}
+
+static struct nf_hook_ops ebt_ops_nat[] = {
+	{
+		.hook		= ebt_nat_dst,
+		.owner		= THIS_MODULE,
+		.pf		= PF_BRIDGE,
+		.hooknum	= NF_BR_LOCAL_OUT,
+		.priority	= NF_BR_PRI_NAT_DST_OTHER,
+	},
+	{
+		.hook		= ebt_nat_src,
+		.owner		= THIS_MODULE,
+		.pf		= PF_BRIDGE,
+		.hooknum	= NF_BR_POST_ROUTING,
+		.priority	= NF_BR_PRI_NAT_SRC,
+	},
+	{
+		.hook		= ebt_nat_dst,
+		.owner		= THIS_MODULE,
+		.pf		= PF_BRIDGE,
+		.hooknum	= NF_BR_PRE_ROUTING,
+		.priority	= NF_BR_PRI_NAT_DST_BRIDGED,
+	},
+};
+
+static int __init init(void)
+{
+	int i, ret, j;
+
+	ret = ebt_register_table(&frame_nat);
+	if (ret < 0)
+		return ret;
+	for (i = 0; i < ARRAY_SIZE(ebt_ops_nat); i++)
+		if ((ret = nf_register_hook(&ebt_ops_nat[i])) < 0)
+			goto cleanup;
+	return ret;
+cleanup:
+	for (j = 0; j < i; j++)
+		nf_unregister_hook(&ebt_ops_nat[j]);
+	ebt_unregister_table(&frame_nat);
+	return ret;
+}
+
+static void __exit fini(void)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(ebt_ops_nat); i++)
+		nf_unregister_hook(&ebt_ops_nat[i]);
+	ebt_unregister_table(&frame_nat);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");
diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c
new file mode 100644
index 00000000000..18ebc664769
--- /dev/null
+++ b/net/bridge/netfilter/ebtables.c
@@ -0,0 +1,1507 @@
+/*
+ *  ebtables
+ *
+ *  Author:
+ *  Bart De Schuymer		<bdschuym@pandora.be>
+ *
+ *  ebtables.c,v 2.0, July, 2002
+ *
+ *  This code is stongly inspired on the iptables code which is
+ *  Copyright (C) 1999 Paul `Rusty' Russell & Michael J. Neuling
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version
+ *  2 of the License, or (at your option) any later version.
+ */
+
+/* used for print_string */
+#include <linux/sched.h>
+#include <linux/tty.h>
+
+#include <linux/kmod.h>
+#include <linux/module.h>
+#include <linux/vmalloc.h>
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/spinlock.h>
+#include <asm/uaccess.h>
+#include <linux/smp.h>
+#include <net/sock.h>
+/* needed for logical [in,out]-dev filtering */
+#include "../br_private.h"
+
+/* list_named_find */
+#define ASSERT_READ_LOCK(x)
+#define ASSERT_WRITE_LOCK(x)
+#include <linux/netfilter_ipv4/listhelp.h>
+
+#if 0
+/* use this for remote debugging
+ * Copyright (C) 1998 by Ori Pomerantz
+ * Print the string to the appropriate tty, the one
+ * the current task uses
+ */
+static void print_string(char *str)
+{
+	struct tty_struct *my_tty;
+
+	/* The tty for the current task */
+	my_tty = current->signal->tty;
+	if (my_tty != NULL) {
+		my_tty->driver->write(my_tty, 0, str, strlen(str));
+		my_tty->driver->write(my_tty, 0, "\015\012", 2);
+	}
+}
+
+#define BUGPRINT(args) print_string(args);
+#else
+#define BUGPRINT(format, args...) printk("kernel msg: ebtables bug: please "\
+                                         "report to author: "format, ## args)
+/* #define BUGPRINT(format, args...) */
+#endif
+#define MEMPRINT(format, args...) printk("kernel msg: ebtables "\
+                                         ": out of memory: "format, ## args)
+/* #define MEMPRINT(format, args...) */
+
+
+
+/*
+ * Each cpu has its own set of counters, so there is no need for write_lock in
+ * the softirq
+ * For reading or updating the counters, the user context needs to
+ * get a write_lock
+ */
+
+/* The size of each set of counters is altered to get cache alignment */
+#define SMP_ALIGN(x) (((x) + SMP_CACHE_BYTES-1) & ~(SMP_CACHE_BYTES-1))
+#define COUNTER_OFFSET(n) (SMP_ALIGN(n * sizeof(struct ebt_counter)))
+#define COUNTER_BASE(c, n, cpu) ((struct ebt_counter *)(((char *)c) + \
+   COUNTER_OFFSET(n) * cpu))
+
+
+
+static DECLARE_MUTEX(ebt_mutex);
+static LIST_HEAD(ebt_tables);
+static LIST_HEAD(ebt_targets);
+static LIST_HEAD(ebt_matches);
+static LIST_HEAD(ebt_watchers);
+
+static struct ebt_target ebt_standard_target =
+{ {NULL, NULL}, EBT_STANDARD_TARGET, NULL, NULL, NULL, NULL};
+
+static inline int ebt_do_watcher (struct ebt_entry_watcher *w,
+   const struct sk_buff *skb, unsigned int hooknr, const struct net_device *in,
+   const struct net_device *out)
+{
+	w->u.watcher->watcher(skb, hooknr, in, out, w->data,
+	   w->watcher_size);
+	/* watchers don't give a verdict */
+	return 0;
+}
+
+static inline int ebt_do_match (struct ebt_entry_match *m,
+   const struct sk_buff *skb, const struct net_device *in,
+   const struct net_device *out)
+{
+	return m->u.match->match(skb, in, out, m->data,
+	   m->match_size);
+}
+
+static inline int ebt_dev_check(char *entry, const struct net_device *device)
+{
+	int i = 0;
+	char *devname = device->name;
+
+	if (*entry == '\0')
+		return 0;
+	if (!device)
+		return 1;
+	/* 1 is the wildcard token */
+	while (entry[i] != '\0' && entry[i] != 1 && entry[i] == devname[i])
+		i++;
+	return (devname[i] != entry[i] && entry[i] != 1);
+}
+
+#define FWINV2(bool,invflg) ((bool) ^ !!(e->invflags & invflg))
+/* process standard matches */
+static inline int ebt_basic_match(struct ebt_entry *e, struct ethhdr *h,
+   const struct net_device *in, const struct net_device *out)
+{
+	int verdict, i;
+
+	if (e->bitmask & EBT_802_3) {
+		if (FWINV2(ntohs(h->h_proto) >= 1536, EBT_IPROTO))
+			return 1;
+	} else if (!(e->bitmask & EBT_NOPROTO) &&
+	   FWINV2(e->ethproto != h->h_proto, EBT_IPROTO))
+		return 1;
+
+	if (FWINV2(ebt_dev_check(e->in, in), EBT_IIN))
+		return 1;
+	if (FWINV2(ebt_dev_check(e->out, out), EBT_IOUT))
+		return 1;
+	if ((!in || !in->br_port) ? 0 : FWINV2(ebt_dev_check(
+	   e->logical_in, in->br_port->br->dev), EBT_ILOGICALIN))
+		return 1;
+	if ((!out || !out->br_port) ? 0 : FWINV2(ebt_dev_check(
+	   e->logical_out, out->br_port->br->dev), EBT_ILOGICALOUT))
+		return 1;
+
+	if (e->bitmask & EBT_SOURCEMAC) {
+		verdict = 0;
+		for (i = 0; i < 6; i++)
+			verdict |= (h->h_source[i] ^ e->sourcemac[i]) &
+			   e->sourcemsk[i];
+		if (FWINV2(verdict != 0, EBT_ISOURCE) )
+			return 1;
+	}
+	if (e->bitmask & EBT_DESTMAC) {
+		verdict = 0;
+		for (i = 0; i < 6; i++)
+			verdict |= (h->h_dest[i] ^ e->destmac[i]) &
+			   e->destmsk[i];
+		if (FWINV2(verdict != 0, EBT_IDEST) )
+			return 1;
+	}
+	return 0;
+}
+
+/* Do some firewalling */
+unsigned int ebt_do_table (unsigned int hook, struct sk_buff **pskb,
+   const struct net_device *in, const struct net_device *out,
+   struct ebt_table *table)
+{
+	int i, nentries;
+	struct ebt_entry *point;
+	struct ebt_counter *counter_base, *cb_base;
+	struct ebt_entry_target *t;
+	int verdict, sp = 0;
+	struct ebt_chainstack *cs;
+	struct ebt_entries *chaininfo;
+	char *base;
+	struct ebt_table_info *private;
+
+	read_lock_bh(&table->lock);
+	private = table->private;
+	cb_base = COUNTER_BASE(private->counters, private->nentries,
+	   smp_processor_id());
+	if (private->chainstack)
+		cs = private->chainstack[smp_processor_id()];
+	else
+		cs = NULL;
+	chaininfo = private->hook_entry[hook];
+	nentries = private->hook_entry[hook]->nentries;
+	point = (struct ebt_entry *)(private->hook_entry[hook]->data);
+	counter_base = cb_base + private->hook_entry[hook]->counter_offset;
+	/* base for chain jumps */
+	base = private->entries;
+	i = 0;
+	while (i < nentries) {
+		if (ebt_basic_match(point, eth_hdr(*pskb), in, out))
+			goto letscontinue;
+
+		if (EBT_MATCH_ITERATE(point, ebt_do_match, *pskb, in, out) != 0)
+			goto letscontinue;
+
+		/* increase counter */
+		(*(counter_base + i)).pcnt++;
+		(*(counter_base + i)).bcnt+=(**pskb).len;
+
+		/* these should only watch: not modify, nor tell us
+		   what to do with the packet */
+		EBT_WATCHER_ITERATE(point, ebt_do_watcher, *pskb, hook, in,
+		   out);
+
+		t = (struct ebt_entry_target *)
+		   (((char *)point) + point->target_offset);
+		/* standard target */
+		if (!t->u.target->target)
+			verdict = ((struct ebt_standard_target *)t)->verdict;
+		else
+			verdict = t->u.target->target(pskb, hook,
+			   in, out, t->data, t->target_size);
+		if (verdict == EBT_ACCEPT) {
+			read_unlock_bh(&table->lock);
+			return NF_ACCEPT;
+		}
+		if (verdict == EBT_DROP) {
+			read_unlock_bh(&table->lock);
+			return NF_DROP;
+		}
+		if (verdict == EBT_RETURN) {
+letsreturn:
+#ifdef CONFIG_NETFILTER_DEBUG
+			if (sp == 0) {
+				BUGPRINT("RETURN on base chain");
+				/* act like this is EBT_CONTINUE */
+				goto letscontinue;
+			}
+#endif
+			sp--;
+			/* put all the local variables right */
+			i = cs[sp].n;
+			chaininfo = cs[sp].chaininfo;
+			nentries = chaininfo->nentries;
+			point = cs[sp].e;
+			counter_base = cb_base +
+			   chaininfo->counter_offset;
+			continue;
+		}
+		if (verdict == EBT_CONTINUE)
+			goto letscontinue;
+#ifdef CONFIG_NETFILTER_DEBUG
+		if (verdict < 0) {
+			BUGPRINT("bogus standard verdict\n");
+			read_unlock_bh(&table->lock);
+			return NF_DROP;
+		}
+#endif
+		/* jump to a udc */
+		cs[sp].n = i + 1;
+		cs[sp].chaininfo = chaininfo;
+		cs[sp].e = (struct ebt_entry *)
+		   (((char *)point) + point->next_offset);
+		i = 0;
+		chaininfo = (struct ebt_entries *) (base + verdict);
+#ifdef CONFIG_NETFILTER_DEBUG
+		if (chaininfo->distinguisher) {
+			BUGPRINT("jump to non-chain\n");
+			read_unlock_bh(&table->lock);
+			return NF_DROP;
+		}
+#endif
+		nentries = chaininfo->nentries;
+		point = (struct ebt_entry *)chaininfo->data;
+		counter_base = cb_base + chaininfo->counter_offset;
+		sp++;
+		continue;
+letscontinue:
+		point = (struct ebt_entry *)
+		   (((char *)point) + point->next_offset);
+		i++;
+	}
+
+	/* I actually like this :) */
+	if (chaininfo->policy == EBT_RETURN)
+		goto letsreturn;
+	if (chaininfo->policy == EBT_ACCEPT) {
+		read_unlock_bh(&table->lock);
+		return NF_ACCEPT;
+	}
+	read_unlock_bh(&table->lock);
+	return NF_DROP;
+}
+
+/* If it succeeds, returns element and locks mutex */
+static inline void *
+find_inlist_lock_noload(struct list_head *head, const char *name, int *error,
+   struct semaphore *mutex)
+{
+	void *ret;
+
+	*error = down_interruptible(mutex);
+	if (*error != 0)
+		return NULL;
+
+	ret = list_named_find(head, name);
+	if (!ret) {
+		*error = -ENOENT;
+		up(mutex);
+	}
+	return ret;
+}
+
+#ifndef CONFIG_KMOD
+#define find_inlist_lock(h,n,p,e,m) find_inlist_lock_noload((h),(n),(e),(m))
+#else
+static void *
+find_inlist_lock(struct list_head *head, const char *name, const char *prefix,
+   int *error, struct semaphore *mutex)
+{
+	void *ret;
+
+	ret = find_inlist_lock_noload(head, name, error, mutex);
+	if (!ret) {
+		request_module("%s%s", prefix, name);
+		ret = find_inlist_lock_noload(head, name, error, mutex);
+	}
+	return ret;
+}
+#endif
+
+static inline struct ebt_table *
+find_table_lock(const char *name, int *error, struct semaphore *mutex)
+{
+	return find_inlist_lock(&ebt_tables, name, "ebtable_", error, mutex);
+}
+
+static inline struct ebt_match *
+find_match_lock(const char *name, int *error, struct semaphore *mutex)
+{
+	return find_inlist_lock(&ebt_matches, name, "ebt_", error, mutex);
+}
+
+static inline struct ebt_watcher *
+find_watcher_lock(const char *name, int *error, struct semaphore *mutex)
+{
+	return find_inlist_lock(&ebt_watchers, name, "ebt_", error, mutex);
+}
+
+static inline struct ebt_target *
+find_target_lock(const char *name, int *error, struct semaphore *mutex)
+{
+	return find_inlist_lock(&ebt_targets, name, "ebt_", error, mutex);
+}
+
+static inline int
+ebt_check_match(struct ebt_entry_match *m, struct ebt_entry *e,
+   const char *name, unsigned int hookmask, unsigned int *cnt)
+{
+	struct ebt_match *match;
+	int ret;
+
+	if (((char *)m) + m->match_size + sizeof(struct ebt_entry_match) >
+	   ((char *)e) + e->watchers_offset)
+		return -EINVAL;
+	match = find_match_lock(m->u.name, &ret, &ebt_mutex);
+	if (!match)
+		return ret;
+	m->u.match = match;
+	if (!try_module_get(match->me)) {
+		up(&ebt_mutex);
+		return -ENOENT;
+	}
+	up(&ebt_mutex);
+	if (match->check &&
+	   match->check(name, hookmask, e, m->data, m->match_size) != 0) {
+		BUGPRINT("match->check failed\n");
+		module_put(match->me);
+		return -EINVAL;
+	}
+	(*cnt)++;
+	return 0;
+}
+
+static inline int
+ebt_check_watcher(struct ebt_entry_watcher *w, struct ebt_entry *e,
+   const char *name, unsigned int hookmask, unsigned int *cnt)
+{
+	struct ebt_watcher *watcher;
+	int ret;
+
+	if (((char *)w) + w->watcher_size + sizeof(struct ebt_entry_watcher) >
+	   ((char *)e) + e->target_offset)
+		return -EINVAL;
+	watcher = find_watcher_lock(w->u.name, &ret, &ebt_mutex);
+	if (!watcher)
+		return ret;
+	w->u.watcher = watcher;
+	if (!try_module_get(watcher->me)) {
+		up(&ebt_mutex);
+		return -ENOENT;
+	}
+	up(&ebt_mutex);
+	if (watcher->check &&
+	   watcher->check(name, hookmask, e, w->data, w->watcher_size) != 0) {
+		BUGPRINT("watcher->check failed\n");
+		module_put(watcher->me);
+		return -EINVAL;
+	}
+	(*cnt)++;
+	return 0;
+}
+
+/*
+ * this one is very careful, as it is the first function
+ * to parse the userspace data
+ */
+static inline int
+ebt_check_entry_size_and_hooks(struct ebt_entry *e,
+   struct ebt_table_info *newinfo, char *base, char *limit,
+   struct ebt_entries **hook_entries, unsigned int *n, unsigned int *cnt,
+   unsigned int *totalcnt, unsigned int *udc_cnt, unsigned int valid_hooks)
+{
+	int i;
+
+	for (i = 0; i < NF_BR_NUMHOOKS; i++) {
+		if ((valid_hooks & (1 << i)) == 0)
+			continue;
+		if ( (char *)hook_entries[i] - base ==
+		   (char *)e - newinfo->entries)
+			break;
+	}
+	/* beginning of a new chain
+	   if i == NF_BR_NUMHOOKS it must be a user defined chain */
+	if (i != NF_BR_NUMHOOKS || !(e->bitmask & EBT_ENTRY_OR_ENTRIES)) {
+		if ((e->bitmask & EBT_ENTRY_OR_ENTRIES) != 0) {
+			/* we make userspace set this right,
+			   so there is no misunderstanding */
+			BUGPRINT("EBT_ENTRY_OR_ENTRIES shouldn't be set "
+			         "in distinguisher\n");
+			return -EINVAL;
+		}
+		/* this checks if the previous chain has as many entries
+		   as it said it has */
+		if (*n != *cnt) {
+			BUGPRINT("nentries does not equal the nr of entries "
+		                 "in the chain\n");
+			return -EINVAL;
+		}
+		/* before we look at the struct, be sure it is not too big */
+		if ((char *)hook_entries[i] + sizeof(struct ebt_entries)
+		   > limit) {
+			BUGPRINT("entries_size too small\n");
+			return -EINVAL;
+		}
+		if (((struct ebt_entries *)e)->policy != EBT_DROP &&
+		   ((struct ebt_entries *)e)->policy != EBT_ACCEPT) {
+			/* only RETURN from udc */
+			if (i != NF_BR_NUMHOOKS ||
+			   ((struct ebt_entries *)e)->policy != EBT_RETURN) {
+				BUGPRINT("bad policy\n");
+				return -EINVAL;
+			}
+		}
+		if (i == NF_BR_NUMHOOKS) /* it's a user defined chain */
+			(*udc_cnt)++;
+		else
+			newinfo->hook_entry[i] = (struct ebt_entries *)e;
+		if (((struct ebt_entries *)e)->counter_offset != *totalcnt) {
+			BUGPRINT("counter_offset != totalcnt");
+			return -EINVAL;
+		}
+		*n = ((struct ebt_entries *)e)->nentries;
+		*cnt = 0;
+		return 0;
+	}
+	/* a plain old entry, heh */
+	if (sizeof(struct ebt_entry) > e->watchers_offset ||
+	   e->watchers_offset > e->target_offset ||
+	   e->target_offset >= e->next_offset) {
+		BUGPRINT("entry offsets not in right order\n");
+		return -EINVAL;
+	}
+	/* this is not checked anywhere else */
+	if (e->next_offset - e->target_offset < sizeof(struct ebt_entry_target)) {
+		BUGPRINT("target size too small\n");
+		return -EINVAL;
+	}
+
+	(*cnt)++;
+	(*totalcnt)++;
+	return 0;
+}
+
+struct ebt_cl_stack
+{
+	struct ebt_chainstack cs;
+	int from;
+	unsigned int hookmask;
+};
+
+/*
+ * we need these positions to check that the jumps to a different part of the
+ * entries is a jump to the beginning of a new chain.
+ */
+static inline int
+ebt_get_udc_positions(struct ebt_entry *e, struct ebt_table_info *newinfo,
+   struct ebt_entries **hook_entries, unsigned int *n, unsigned int valid_hooks,
+   struct ebt_cl_stack *udc)
+{
+	int i;
+
+	/* we're only interested in chain starts */
+	if (e->bitmask & EBT_ENTRY_OR_ENTRIES)
+		return 0;
+	for (i = 0; i < NF_BR_NUMHOOKS; i++) {
+		if ((valid_hooks & (1 << i)) == 0)
+			continue;
+		if (newinfo->hook_entry[i] == (struct ebt_entries *)e)
+			break;
+	}
+	/* only care about udc */
+	if (i != NF_BR_NUMHOOKS)
+		return 0;
+
+	udc[*n].cs.chaininfo = (struct ebt_entries *)e;
+	/* these initialisations are depended on later in check_chainloops() */
+	udc[*n].cs.n = 0;
+	udc[*n].hookmask = 0;
+
+	(*n)++;
+	return 0;
+}
+
+static inline int
+ebt_cleanup_match(struct ebt_entry_match *m, unsigned int *i)
+{
+	if (i && (*i)-- == 0)
+		return 1;
+	if (m->u.match->destroy)
+		m->u.match->destroy(m->data, m->match_size);
+	module_put(m->u.match->me);
+
+	return 0;
+}
+
+static inline int
+ebt_cleanup_watcher(struct ebt_entry_watcher *w, unsigned int *i)
+{
+	if (i && (*i)-- == 0)
+		return 1;
+	if (w->u.watcher->destroy)
+		w->u.watcher->destroy(w->data, w->watcher_size);
+	module_put(w->u.watcher->me);
+
+	return 0;
+}
+
+static inline int
+ebt_cleanup_entry(struct ebt_entry *e, unsigned int *cnt)
+{
+	struct ebt_entry_target *t;
+
+	if ((e->bitmask & EBT_ENTRY_OR_ENTRIES) == 0)
+		return 0;
+	/* we're done */
+	if (cnt && (*cnt)-- == 0)
+		return 1;
+	EBT_WATCHER_ITERATE(e, ebt_cleanup_watcher, NULL);
+	EBT_MATCH_ITERATE(e, ebt_cleanup_match, NULL);
+	t = (struct ebt_entry_target *)(((char *)e) + e->target_offset);
+	if (t->u.target->destroy)
+		t->u.target->destroy(t->data, t->target_size);
+	module_put(t->u.target->me);
+
+	return 0;
+}
+
+static inline int
+ebt_check_entry(struct ebt_entry *e, struct ebt_table_info *newinfo,
+   const char *name, unsigned int *cnt, unsigned int valid_hooks,
+   struct ebt_cl_stack *cl_s, unsigned int udc_cnt)
+{
+	struct ebt_entry_target *t;
+	struct ebt_target *target;
+	unsigned int i, j, hook = 0, hookmask = 0;
+	int ret;
+
+	/* don't mess with the struct ebt_entries */
+	if ((e->bitmask & EBT_ENTRY_OR_ENTRIES) == 0)
+		return 0;
+
+	if (e->bitmask & ~EBT_F_MASK) {
+		BUGPRINT("Unknown flag for bitmask\n");
+		return -EINVAL;
+	}
+	if (e->invflags & ~EBT_INV_MASK) {
+		BUGPRINT("Unknown flag for inv bitmask\n");
+		return -EINVAL;
+	}
+	if ( (e->bitmask & EBT_NOPROTO) && (e->bitmask & EBT_802_3) ) {
+		BUGPRINT("NOPROTO & 802_3 not allowed\n");
+		return -EINVAL;
+	}
+	/* what hook do we belong to? */
+	for (i = 0; i < NF_BR_NUMHOOKS; i++) {
+		if ((valid_hooks & (1 << i)) == 0)
+			continue;
+		if ((char *)newinfo->hook_entry[i] < (char *)e)
+			hook = i;
+		else
+			break;
+	}
+	/* (1 << NF_BR_NUMHOOKS) tells the check functions the rule is on
+	   a base chain */
+	if (i < NF_BR_NUMHOOKS)
+		hookmask = (1 << hook) | (1 << NF_BR_NUMHOOKS);
+	else {
+		for (i = 0; i < udc_cnt; i++)
+			if ((char *)(cl_s[i].cs.chaininfo) > (char *)e)
+				break;
+		if (i == 0)
+			hookmask = (1 << hook) | (1 << NF_BR_NUMHOOKS);
+		else
+			hookmask = cl_s[i - 1].hookmask;
+	}
+	i = 0;
+	ret = EBT_MATCH_ITERATE(e, ebt_check_match, e, name, hookmask, &i);
+	if (ret != 0)
+		goto cleanup_matches;
+	j = 0;
+	ret = EBT_WATCHER_ITERATE(e, ebt_check_watcher, e, name, hookmask, &j);
+	if (ret != 0)
+		goto cleanup_watchers;
+	t = (struct ebt_entry_target *)(((char *)e) + e->target_offset);
+	target = find_target_lock(t->u.name, &ret, &ebt_mutex);
+	if (!target)
+		goto cleanup_watchers;
+	if (!try_module_get(target->me)) {
+		up(&ebt_mutex);
+		ret = -ENOENT;
+		goto cleanup_watchers;
+	}
+	up(&ebt_mutex);
+
+	t->u.target = target;
+	if (t->u.target == &ebt_standard_target) {
+		if (e->target_offset + sizeof(struct ebt_standard_target) >
+		   e->next_offset) {
+			BUGPRINT("Standard target size too big\n");
+			ret = -EFAULT;
+			goto cleanup_watchers;
+		}
+		if (((struct ebt_standard_target *)t)->verdict <
+		   -NUM_STANDARD_TARGETS) {
+			BUGPRINT("Invalid standard target\n");
+			ret = -EFAULT;
+			goto cleanup_watchers;
+		}
+	} else if ((e->target_offset + t->target_size +
+	   sizeof(struct ebt_entry_target) > e->next_offset) ||
+	   (t->u.target->check &&
+	   t->u.target->check(name, hookmask, e, t->data, t->target_size) != 0)){
+		module_put(t->u.target->me);
+		ret = -EFAULT;
+		goto cleanup_watchers;
+	}
+	(*cnt)++;
+	return 0;
+cleanup_watchers:
+	EBT_WATCHER_ITERATE(e, ebt_cleanup_watcher, &j);
+cleanup_matches:
+	EBT_MATCH_ITERATE(e, ebt_cleanup_match, &i);
+	return ret;
+}
+
+/*
+ * checks for loops and sets the hook mask for udc
+ * the hook mask for udc tells us from which base chains the udc can be
+ * accessed. This mask is a parameter to the check() functions of the extensions
+ */
+static int check_chainloops(struct ebt_entries *chain, struct ebt_cl_stack *cl_s,
+   unsigned int udc_cnt, unsigned int hooknr, char *base)
+{
+	int i, chain_nr = -1, pos = 0, nentries = chain->nentries, verdict;
+	struct ebt_entry *e = (struct ebt_entry *)chain->data;
+	struct ebt_entry_target *t;
+
+	while (pos < nentries || chain_nr != -1) {
+		/* end of udc, go back one 'recursion' step */
+		if (pos == nentries) {
+			/* put back values of the time when this chain was called */
+			e = cl_s[chain_nr].cs.e;
+			if (cl_s[chain_nr].from != -1)
+				nentries =
+				cl_s[cl_s[chain_nr].from].cs.chaininfo->nentries;
+			else
+				nentries = chain->nentries;
+			pos = cl_s[chain_nr].cs.n;
+			/* make sure we won't see a loop that isn't one */
+			cl_s[chain_nr].cs.n = 0;
+			chain_nr = cl_s[chain_nr].from;
+			if (pos == nentries)
+				continue;
+		}
+		t = (struct ebt_entry_target *)
+		   (((char *)e) + e->target_offset);
+		if (strcmp(t->u.name, EBT_STANDARD_TARGET))
+			goto letscontinue;
+		if (e->target_offset + sizeof(struct ebt_standard_target) >
+		   e->next_offset) {
+			BUGPRINT("Standard target size too big\n");
+			return -1;
+		}
+		verdict = ((struct ebt_standard_target *)t)->verdict;
+		if (verdict >= 0) { /* jump to another chain */
+			struct ebt_entries *hlp2 =
+			   (struct ebt_entries *)(base + verdict);
+			for (i = 0; i < udc_cnt; i++)
+				if (hlp2 == cl_s[i].cs.chaininfo)
+					break;
+			/* bad destination or loop */
+			if (i == udc_cnt) {
+				BUGPRINT("bad destination\n");
+				return -1;
+			}
+			if (cl_s[i].cs.n) {
+				BUGPRINT("loop\n");
+				return -1;
+			}
+			/* this can't be 0, so the above test is correct */
+			cl_s[i].cs.n = pos + 1;
+			pos = 0;
+			cl_s[i].cs.e = ((void *)e + e->next_offset);
+			e = (struct ebt_entry *)(hlp2->data);
+			nentries = hlp2->nentries;
+			cl_s[i].from = chain_nr;
+			chain_nr = i;
+			/* this udc is accessible from the base chain for hooknr */
+			cl_s[i].hookmask |= (1 << hooknr);
+			continue;
+		}
+letscontinue:
+		e = (void *)e + e->next_offset;
+		pos++;
+	}
+	return 0;
+}
+
+/* do the parsing of the table/chains/entries/matches/watchers/targets, heh */
+static int translate_table(struct ebt_replace *repl,
+   struct ebt_table_info *newinfo)
+{
+	unsigned int i, j, k, udc_cnt;
+	int ret;
+	struct ebt_cl_stack *cl_s = NULL; /* used in the checking for chain loops */
+
+	i = 0;
+	while (i < NF_BR_NUMHOOKS && !(repl->valid_hooks & (1 << i)))
+		i++;
+	if (i == NF_BR_NUMHOOKS) {
+		BUGPRINT("No valid hooks specified\n");
+		return -EINVAL;
+	}
+	if (repl->hook_entry[i] != (struct ebt_entries *)repl->entries) {
+		BUGPRINT("Chains don't start at beginning\n");
+		return -EINVAL;
+	}
+	/* make sure chains are ordered after each other in same order
+	   as their corresponding hooks */
+	for (j = i + 1; j < NF_BR_NUMHOOKS; j++) {
+		if (!(repl->valid_hooks & (1 << j)))
+			continue;
+		if ( repl->hook_entry[j] <= repl->hook_entry[i] ) {
+			BUGPRINT("Hook order must be followed\n");
+			return -EINVAL;
+		}
+		i = j;
+	}
+
+	for (i = 0; i < NF_BR_NUMHOOKS; i++)
+		newinfo->hook_entry[i] = NULL;
+
+	newinfo->entries_size = repl->entries_size;
+	newinfo->nentries = repl->nentries;
+
+	/* do some early checkings and initialize some things */
+	i = 0; /* holds the expected nr. of entries for the chain */
+	j = 0; /* holds the up to now counted entries for the chain */
+	k = 0; /* holds the total nr. of entries, should equal
+	          newinfo->nentries afterwards */
+	udc_cnt = 0; /* will hold the nr. of user defined chains (udc) */
+	ret = EBT_ENTRY_ITERATE(newinfo->entries, newinfo->entries_size,
+	   ebt_check_entry_size_and_hooks, newinfo, repl->entries,
+	   repl->entries + repl->entries_size, repl->hook_entry, &i, &j, &k,
+	   &udc_cnt, repl->valid_hooks);
+
+	if (ret != 0)
+		return ret;
+
+	if (i != j) {
+		BUGPRINT("nentries does not equal the nr of entries in the "
+		         "(last) chain\n");
+		return -EINVAL;
+	}
+	if (k != newinfo->nentries) {
+		BUGPRINT("Total nentries is wrong\n");
+		return -EINVAL;
+	}
+
+	/* check if all valid hooks have a chain */
+	for (i = 0; i < NF_BR_NUMHOOKS; i++) {
+		if (newinfo->hook_entry[i] == NULL &&
+		   (repl->valid_hooks & (1 << i))) {
+			BUGPRINT("Valid hook without chain\n");
+			return -EINVAL;
+		}
+	}
+
+	/* get the location of the udc, put them in an array
+	   while we're at it, allocate the chainstack */
+	if (udc_cnt) {
+		/* this will get free'd in do_replace()/ebt_register_table()
+		   if an error occurs */
+		newinfo->chainstack = (struct ebt_chainstack **)
+		   vmalloc(num_possible_cpus() * sizeof(struct ebt_chainstack));
+		if (!newinfo->chainstack)
+			return -ENOMEM;
+		for (i = 0; i < num_possible_cpus(); i++) {
+			newinfo->chainstack[i] =
+			   vmalloc(udc_cnt * sizeof(struct ebt_chainstack));
+			if (!newinfo->chainstack[i]) {
+				while (i)
+					vfree(newinfo->chainstack[--i]);
+				vfree(newinfo->chainstack);
+				newinfo->chainstack = NULL;
+				return -ENOMEM;
+			}
+		}
+
+		cl_s = (struct ebt_cl_stack *)
+		   vmalloc(udc_cnt * sizeof(struct ebt_cl_stack));
+		if (!cl_s)
+			return -ENOMEM;
+		i = 0; /* the i'th udc */
+		EBT_ENTRY_ITERATE(newinfo->entries, newinfo->entries_size,
+		   ebt_get_udc_positions, newinfo, repl->hook_entry, &i,
+		   repl->valid_hooks, cl_s);
+		/* sanity check */
+		if (i != udc_cnt) {
+			BUGPRINT("i != udc_cnt\n");
+			vfree(cl_s);
+			return -EFAULT;
+		}
+	}
+
+	/* Check for loops */
+	for (i = 0; i < NF_BR_NUMHOOKS; i++)
+		if (repl->valid_hooks & (1 << i))
+			if (check_chainloops(newinfo->hook_entry[i],
+			   cl_s, udc_cnt, i, newinfo->entries)) {
+				if (cl_s)
+					vfree(cl_s);
+				return -EINVAL;
+			}
+
+	/* we now know the following (along with E=mc˛):
+	   - the nr of entries in each chain is right
+	   - the size of the allocated space is right
+	   - all valid hooks have a corresponding chain
+	   - there are no loops
+	   - wrong data can still be on the level of a single entry
+	   - could be there are jumps to places that are not the
+	     beginning of a chain. This can only occur in chains that
+	     are not accessible from any base chains, so we don't care. */
+
+	/* used to know what we need to clean up if something goes wrong */
+	i = 0;
+	ret = EBT_ENTRY_ITERATE(newinfo->entries, newinfo->entries_size,
+	   ebt_check_entry, newinfo, repl->name, &i, repl->valid_hooks,
+	   cl_s, udc_cnt);
+	if (ret != 0) {
+		EBT_ENTRY_ITERATE(newinfo->entries, newinfo->entries_size,
+		   ebt_cleanup_entry, &i);
+	}
+	if (cl_s)
+		vfree(cl_s);
+	return ret;
+}
+
+/* called under write_lock */
+static void get_counters(struct ebt_counter *oldcounters,
+   struct ebt_counter *counters, unsigned int nentries)
+{
+	int i, cpu;
+	struct ebt_counter *counter_base;
+
+	/* counters of cpu 0 */
+	memcpy(counters, oldcounters,
+	   sizeof(struct ebt_counter) * nentries);
+	/* add other counters to those of cpu 0 */
+	for (cpu = 1; cpu < num_possible_cpus(); cpu++) {
+		counter_base = COUNTER_BASE(oldcounters, nentries, cpu);
+		for (i = 0; i < nentries; i++) {
+			counters[i].pcnt += counter_base[i].pcnt;
+			counters[i].bcnt += counter_base[i].bcnt;
+		}
+	}
+}
+
+/* replace the table */
+static int do_replace(void __user *user, unsigned int len)
+{
+	int ret, i, countersize;
+	struct ebt_table_info *newinfo;
+	struct ebt_replace tmp;
+	struct ebt_table *t;
+	struct ebt_counter *counterstmp = NULL;
+	/* used to be able to unlock earlier */
+	struct ebt_table_info *table;
+
+	if (copy_from_user(&tmp, user, sizeof(tmp)) != 0)
+		return -EFAULT;
+
+	if (len != sizeof(tmp) + tmp.entries_size) {
+		BUGPRINT("Wrong len argument\n");
+		return -EINVAL;
+	}
+
+	if (tmp.entries_size == 0) {
+		BUGPRINT("Entries_size never zero\n");
+		return -EINVAL;
+	}
+	countersize = COUNTER_OFFSET(tmp.nentries) * num_possible_cpus();
+	newinfo = (struct ebt_table_info *)
+	   vmalloc(sizeof(struct ebt_table_info) + countersize);
+	if (!newinfo)
+		return -ENOMEM;
+
+	if (countersize)
+		memset(newinfo->counters, 0, countersize);
+
+	newinfo->entries = (char *)vmalloc(tmp.entries_size);
+	if (!newinfo->entries) {
+		ret = -ENOMEM;
+		goto free_newinfo;
+	}
+	if (copy_from_user(
+	   newinfo->entries, tmp.entries, tmp.entries_size) != 0) {
+		BUGPRINT("Couldn't copy entries from userspace\n");
+		ret = -EFAULT;
+		goto free_entries;
+	}
+
+	/* the user wants counters back
+	   the check on the size is done later, when we have the lock */
+	if (tmp.num_counters) {
+		counterstmp = (struct ebt_counter *)
+		   vmalloc(tmp.num_counters * sizeof(struct ebt_counter));
+		if (!counterstmp) {
+			ret = -ENOMEM;
+			goto free_entries;
+		}
+	}
+	else
+		counterstmp = NULL;
+
+	/* this can get initialized by translate_table() */
+	newinfo->chainstack = NULL;
+	ret = translate_table(&tmp, newinfo);
+
+	if (ret != 0)
+		goto free_counterstmp;
+
+	t = find_table_lock(tmp.name, &ret, &ebt_mutex);
+	if (!t) {
+		ret = -ENOENT;
+		goto free_iterate;
+	}
+
+	/* the table doesn't like it */
+	if (t->check && (ret = t->check(newinfo, tmp.valid_hooks)))
+		goto free_unlock;
+
+	if (tmp.num_counters && tmp.num_counters != t->private->nentries) {
+		BUGPRINT("Wrong nr. of counters requested\n");
+		ret = -EINVAL;
+		goto free_unlock;
+	}
+
+	/* we have the mutex lock, so no danger in reading this pointer */
+	table = t->private;
+	/* make sure the table can only be rmmod'ed if it contains no rules */
+	if (!table->nentries && newinfo->nentries && !try_module_get(t->me)) {
+		ret = -ENOENT;
+		goto free_unlock;
+	} else if (table->nentries && !newinfo->nentries)
+		module_put(t->me);
+	/* we need an atomic snapshot of the counters */
+	write_lock_bh(&t->lock);
+	if (tmp.num_counters)
+		get_counters(t->private->counters, counterstmp,
+		   t->private->nentries);
+
+	t->private = newinfo;
+	write_unlock_bh(&t->lock);
+	up(&ebt_mutex);
+	/* so, a user can change the chains while having messed up her counter
+	   allocation. Only reason why this is done is because this way the lock
+	   is held only once, while this doesn't bring the kernel into a
+	   dangerous state. */
+	if (tmp.num_counters &&
+	   copy_to_user(tmp.counters, counterstmp,
+	   tmp.num_counters * sizeof(struct ebt_counter))) {
+		BUGPRINT("Couldn't copy counters to userspace\n");
+		ret = -EFAULT;
+	}
+	else
+		ret = 0;
+
+	/* decrease module count and free resources */
+	EBT_ENTRY_ITERATE(table->entries, table->entries_size,
+	   ebt_cleanup_entry, NULL);
+
+	vfree(table->entries);
+	if (table->chainstack) {
+		for (i = 0; i < num_possible_cpus(); i++)
+			vfree(table->chainstack[i]);
+		vfree(table->chainstack);
+	}
+	vfree(table);
+
+	if (counterstmp)
+		vfree(counterstmp);
+	return ret;
+
+free_unlock:
+	up(&ebt_mutex);
+free_iterate:
+	EBT_ENTRY_ITERATE(newinfo->entries, newinfo->entries_size,
+	   ebt_cleanup_entry, NULL);
+free_counterstmp:
+	if (counterstmp)
+		vfree(counterstmp);
+	/* can be initialized in translate_table() */
+	if (newinfo->chainstack) {
+		for (i = 0; i < num_possible_cpus(); i++)
+			vfree(newinfo->chainstack[i]);
+		vfree(newinfo->chainstack);
+	}
+free_entries:
+	if (newinfo->entries)
+		vfree(newinfo->entries);
+free_newinfo:
+	if (newinfo)
+		vfree(newinfo);
+	return ret;
+}
+
+int ebt_register_target(struct ebt_target *target)
+{
+	int ret;
+
+	ret = down_interruptible(&ebt_mutex);
+	if (ret != 0)
+		return ret;
+	if (!list_named_insert(&ebt_targets, target)) {
+		up(&ebt_mutex);
+		return -EEXIST;
+	}
+	up(&ebt_mutex);
+
+	return 0;
+}
+
+void ebt_unregister_target(struct ebt_target *target)
+{
+	down(&ebt_mutex);
+	LIST_DELETE(&ebt_targets, target);
+	up(&ebt_mutex);
+}
+
+int ebt_register_match(struct ebt_match *match)
+{
+	int ret;
+
+	ret = down_interruptible(&ebt_mutex);
+	if (ret != 0)
+		return ret;
+	if (!list_named_insert(&ebt_matches, match)) {
+		up(&ebt_mutex);
+		return -EEXIST;
+	}
+	up(&ebt_mutex);
+
+	return 0;
+}
+
+void ebt_unregister_match(struct ebt_match *match)
+{
+	down(&ebt_mutex);
+	LIST_DELETE(&ebt_matches, match);
+	up(&ebt_mutex);
+}
+
+int ebt_register_watcher(struct ebt_watcher *watcher)
+{
+	int ret;
+
+	ret = down_interruptible(&ebt_mutex);
+	if (ret != 0)
+		return ret;
+	if (!list_named_insert(&ebt_watchers, watcher)) {
+		up(&ebt_mutex);
+		return -EEXIST;
+	}
+	up(&ebt_mutex);
+
+	return 0;
+}
+
+void ebt_unregister_watcher(struct ebt_watcher *watcher)
+{
+	down(&ebt_mutex);
+	LIST_DELETE(&ebt_watchers, watcher);
+	up(&ebt_mutex);
+}
+
+int ebt_register_table(struct ebt_table *table)
+{
+	struct ebt_table_info *newinfo;
+	int ret, i, countersize;
+
+	if (!table || !table->table ||!table->table->entries ||
+	    table->table->entries_size == 0 ||
+	    table->table->counters || table->private) {
+		BUGPRINT("Bad table data for ebt_register_table!!!\n");
+		return -EINVAL;
+	}
+
+	countersize = COUNTER_OFFSET(table->table->nentries) * num_possible_cpus();
+	newinfo = (struct ebt_table_info *)
+	   vmalloc(sizeof(struct ebt_table_info) + countersize);
+	ret = -ENOMEM;
+	if (!newinfo)
+		return -ENOMEM;
+
+	newinfo->entries = (char *)vmalloc(table->table->entries_size);
+	if (!(newinfo->entries))
+		goto free_newinfo;
+
+	memcpy(newinfo->entries, table->table->entries,
+	   table->table->entries_size);
+
+	if (countersize)
+		memset(newinfo->counters, 0, countersize);
+
+	/* fill in newinfo and parse the entries */
+	newinfo->chainstack = NULL;
+	ret = translate_table(table->table, newinfo);
+	if (ret != 0) {
+		BUGPRINT("Translate_table failed\n");
+		goto free_chainstack;
+	}
+
+	if (table->check && table->check(newinfo, table->valid_hooks)) {
+		BUGPRINT("The table doesn't like its own initial data, lol\n");
+		return -EINVAL;
+	}
+
+	table->private = newinfo;
+	rwlock_init(&table->lock);
+	ret = down_interruptible(&ebt_mutex);
+	if (ret != 0)
+		goto free_chainstack;
+
+	if (list_named_find(&ebt_tables, table->name)) {
+		ret = -EEXIST;
+		BUGPRINT("Table name already exists\n");
+		goto free_unlock;
+	}
+
+	/* Hold a reference count if the chains aren't empty */
+	if (newinfo->nentries && !try_module_get(table->me)) {
+		ret = -ENOENT;
+		goto free_unlock;
+	}
+	list_prepend(&ebt_tables, table);
+	up(&ebt_mutex);
+	return 0;
+free_unlock:
+	up(&ebt_mutex);
+free_chainstack:
+	if (newinfo->chainstack) {
+		for (i = 0; i < num_possible_cpus(); i++)
+			vfree(newinfo->chainstack[i]);
+		vfree(newinfo->chainstack);
+	}
+	vfree(newinfo->entries);
+free_newinfo:
+	vfree(newinfo);
+	return ret;
+}
+
+void ebt_unregister_table(struct ebt_table *table)
+{
+	int i;
+
+	if (!table) {
+		BUGPRINT("Request to unregister NULL table!!!\n");
+		return;
+	}
+	down(&ebt_mutex);
+	LIST_DELETE(&ebt_tables, table);
+	up(&ebt_mutex);
+	if (table->private->entries)
+		vfree(table->private->entries);
+	if (table->private->chainstack) {
+		for (i = 0; i < num_possible_cpus(); i++)
+			vfree(table->private->chainstack[i]);
+		vfree(table->private->chainstack);
+	}
+	vfree(table->private);
+}
+
+/* userspace just supplied us with counters */
+static int update_counters(void __user *user, unsigned int len)
+{
+	int i, ret;
+	struct ebt_counter *tmp;
+	struct ebt_replace hlp;
+	struct ebt_table *t;
+
+	if (copy_from_user(&hlp, user, sizeof(hlp)))
+		return -EFAULT;
+
+	if (len != sizeof(hlp) + hlp.num_counters * sizeof(struct ebt_counter))
+		return -EINVAL;
+	if (hlp.num_counters == 0)
+		return -EINVAL;
+
+	if ( !(tmp = (struct ebt_counter *)
+	   vmalloc(hlp.num_counters * sizeof(struct ebt_counter))) ){
+		MEMPRINT("Update_counters && nomemory\n");
+		return -ENOMEM;
+	}
+
+	t = find_table_lock(hlp.name, &ret, &ebt_mutex);
+	if (!t)
+		goto free_tmp;
+
+	if (hlp.num_counters != t->private->nentries) {
+		BUGPRINT("Wrong nr of counters\n");
+		ret = -EINVAL;
+		goto unlock_mutex;
+	}
+
+	if ( copy_from_user(tmp, hlp.counters,
+	   hlp.num_counters * sizeof(struct ebt_counter)) ) {
+		BUGPRINT("Updata_counters && !cfu\n");
+		ret = -EFAULT;
+		goto unlock_mutex;
+	}
+
+	/* we want an atomic add of the counters */
+	write_lock_bh(&t->lock);
+
+	/* we add to the counters of the first cpu */
+	for (i = 0; i < hlp.num_counters; i++) {
+		t->private->counters[i].pcnt += tmp[i].pcnt;
+		t->private->counters[i].bcnt += tmp[i].bcnt;
+	}
+
+	write_unlock_bh(&t->lock);
+	ret = 0;
+unlock_mutex:
+	up(&ebt_mutex);
+free_tmp:
+	vfree(tmp);
+	return ret;
+}
+
+static inline int ebt_make_matchname(struct ebt_entry_match *m,
+   char *base, char *ubase)
+{
+	char *hlp = ubase - base + (char *)m;
+	if (copy_to_user(hlp, m->u.match->name, EBT_FUNCTION_MAXNAMELEN))
+		return -EFAULT;
+	return 0;
+}
+
+static inline int ebt_make_watchername(struct ebt_entry_watcher *w,
+   char *base, char *ubase)
+{
+	char *hlp = ubase - base + (char *)w;
+	if (copy_to_user(hlp , w->u.watcher->name, EBT_FUNCTION_MAXNAMELEN))
+		return -EFAULT;
+	return 0;
+}
+
+static inline int ebt_make_names(struct ebt_entry *e, char *base, char *ubase)
+{
+	int ret;
+	char *hlp;
+	struct ebt_entry_target *t;
+
+	if ((e->bitmask & EBT_ENTRY_OR_ENTRIES) == 0)
+		return 0;
+
+	hlp = ubase - base + (char *)e + e->target_offset;
+	t = (struct ebt_entry_target *)(((char *)e) + e->target_offset);
+	
+	ret = EBT_MATCH_ITERATE(e, ebt_make_matchname, base, ubase);
+	if (ret != 0)
+		return ret;
+	ret = EBT_WATCHER_ITERATE(e, ebt_make_watchername, base, ubase);
+	if (ret != 0)
+		return ret;
+	if (copy_to_user(hlp, t->u.target->name, EBT_FUNCTION_MAXNAMELEN))
+		return -EFAULT;
+	return 0;
+}
+
+/* called with ebt_mutex down */
+static int copy_everything_to_user(struct ebt_table *t, void __user *user,
+   int *len, int cmd)
+{
+	struct ebt_replace tmp;
+	struct ebt_counter *counterstmp, *oldcounters;
+	unsigned int entries_size, nentries;
+	char *entries;
+
+	if (cmd == EBT_SO_GET_ENTRIES) {
+		entries_size = t->private->entries_size;
+		nentries = t->private->nentries;
+		entries = t->private->entries;
+		oldcounters = t->private->counters;
+	} else {
+		entries_size = t->table->entries_size;
+		nentries = t->table->nentries;
+		entries = t->table->entries;
+		oldcounters = t->table->counters;
+	}
+
+	if (copy_from_user(&tmp, user, sizeof(tmp))) {
+		BUGPRINT("Cfu didn't work\n");
+		return -EFAULT;
+	}
+
+	if (*len != sizeof(struct ebt_replace) + entries_size +
+	   (tmp.num_counters? nentries * sizeof(struct ebt_counter): 0)) {
+		BUGPRINT("Wrong size\n");
+		return -EINVAL;
+	}
+
+	if (tmp.nentries != nentries) {
+		BUGPRINT("Nentries wrong\n");
+		return -EINVAL;
+	}
+
+	if (tmp.entries_size != entries_size) {
+		BUGPRINT("Wrong size\n");
+		return -EINVAL;
+	}
+
+	/* userspace might not need the counters */
+	if (tmp.num_counters) {
+		if (tmp.num_counters != nentries) {
+			BUGPRINT("Num_counters wrong\n");
+			return -EINVAL;
+		}
+		counterstmp = (struct ebt_counter *)
+		   vmalloc(nentries * sizeof(struct ebt_counter));
+		if (!counterstmp) {
+			MEMPRINT("Couldn't copy counters, out of memory\n");
+			return -ENOMEM;
+		}
+		write_lock_bh(&t->lock);
+		get_counters(oldcounters, counterstmp, nentries);
+		write_unlock_bh(&t->lock);
+
+		if (copy_to_user(tmp.counters, counterstmp,
+		   nentries * sizeof(struct ebt_counter))) {
+			BUGPRINT("Couldn't copy counters to userspace\n");
+			vfree(counterstmp);
+			return -EFAULT;
+		}
+		vfree(counterstmp);
+	}
+
+	if (copy_to_user(tmp.entries, entries, entries_size)) {
+		BUGPRINT("Couldn't copy entries to userspace\n");
+		return -EFAULT;
+	}
+	/* set the match/watcher/target names right */
+	return EBT_ENTRY_ITERATE(entries, entries_size,
+	   ebt_make_names, entries, tmp.entries);
+}
+
+static int do_ebt_set_ctl(struct sock *sk,
+	int cmd, void __user *user, unsigned int len)
+{
+	int ret;
+
+	switch(cmd) {
+	case EBT_SO_SET_ENTRIES:
+		ret = do_replace(user, len);
+		break;
+	case EBT_SO_SET_COUNTERS:
+		ret = update_counters(user, len);
+		break;
+	default:
+		ret = -EINVAL;
+  }
+	return ret;
+}
+
+static int do_ebt_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
+{
+	int ret;
+	struct ebt_replace tmp;
+	struct ebt_table *t;
+
+	if (copy_from_user(&tmp, user, sizeof(tmp)))
+		return -EFAULT;
+
+	t = find_table_lock(tmp.name, &ret, &ebt_mutex);
+	if (!t)
+		return ret;
+
+	switch(cmd) {
+	case EBT_SO_GET_INFO:
+	case EBT_SO_GET_INIT_INFO:
+		if (*len != sizeof(struct ebt_replace)){
+			ret = -EINVAL;
+			up(&ebt_mutex);
+			break;
+		}
+		if (cmd == EBT_SO_GET_INFO) {
+			tmp.nentries = t->private->nentries;
+			tmp.entries_size = t->private->entries_size;
+			tmp.valid_hooks = t->valid_hooks;
+		} else {
+			tmp.nentries = t->table->nentries;
+			tmp.entries_size = t->table->entries_size;
+			tmp.valid_hooks = t->table->valid_hooks;
+		}
+		up(&ebt_mutex);
+		if (copy_to_user(user, &tmp, *len) != 0){
+			BUGPRINT("c2u Didn't work\n");
+			ret = -EFAULT;
+			break;
+		}
+		ret = 0;
+		break;
+
+	case EBT_SO_GET_ENTRIES:
+	case EBT_SO_GET_INIT_ENTRIES:
+		ret = copy_everything_to_user(t, user, len, cmd);
+		up(&ebt_mutex);
+		break;
+
+	default:
+		up(&ebt_mutex);
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static struct nf_sockopt_ops ebt_sockopts =
+{ { NULL, NULL }, PF_INET, EBT_BASE_CTL, EBT_SO_SET_MAX + 1, do_ebt_set_ctl,
+    EBT_BASE_CTL, EBT_SO_GET_MAX + 1, do_ebt_get_ctl, 0, NULL
+};
+
+static int __init init(void)
+{
+	int ret;
+
+	down(&ebt_mutex);
+	list_named_insert(&ebt_targets, &ebt_standard_target);
+	up(&ebt_mutex);
+	if ((ret = nf_register_sockopt(&ebt_sockopts)) < 0)
+		return ret;
+
+	printk(KERN_NOTICE "Ebtables v2.0 registered\n");
+	return 0;
+}
+
+static void __exit fini(void)
+{
+	nf_unregister_sockopt(&ebt_sockopts);
+	printk(KERN_NOTICE "Ebtables v2.0 unregistered\n");
+}
+
+EXPORT_SYMBOL(ebt_register_table);
+EXPORT_SYMBOL(ebt_unregister_table);
+EXPORT_SYMBOL(ebt_register_match);
+EXPORT_SYMBOL(ebt_unregister_match);
+EXPORT_SYMBOL(ebt_register_watcher);
+EXPORT_SYMBOL(ebt_unregister_watcher);
+EXPORT_SYMBOL(ebt_register_target);
+EXPORT_SYMBOL(ebt_unregister_target);
+EXPORT_SYMBOL(ebt_do_table);
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");