Merge branch 'nf-next' of git://1984.lsi.us.es/net-next

include/linux/netfilter/Kbuild

···
 header-y += nf_conntrack_sctp.h
 header-y += nf_conntrack_tcp.h
 header-y += nf_conntrack_tuple_common.h
+header-y += nf_nat.h
 header-y += nfnetlink.h
+header-y += nfnetlink_acct.h
 header-y += nfnetlink_compat.h
 header-y += nfnetlink_conntrack.h
 header-y += nfnetlink_log.h
···
 header-y += xt_IDLETIMER.h
 header-y += xt_LED.h
 header-y += xt_MARK.h
+header-y += xt_nfacct.h
 header-y += xt_NFLOG.h
 header-y += xt_NFQUEUE.h
 header-y += xt_RATEEST.h

include/linux/netfilter/nf_conntrack_common.h

···
 	/* Conntrack is a fake untracked entry */
 	IPS_UNTRACKED_BIT = 12,
 	IPS_UNTRACKED = (1 << IPS_UNTRACKED_BIT),
+
+	/* Conntrack has a userspace helper. */
+	IPS_USERSPACE_HELPER_BIT = 13,
+	IPS_USERSPACE_HELPER = (1 << IPS_USERSPACE_HELPER_BIT),
 };
 
 /* Connection tracking event types */

include/linux/netfilter/nf_conntrack_tuple_common.h

···
 	IP_CT_DIR_MAX
 };
 
+/* The protocol-specific manipulable parts of the tuple: always in
+ * network order
+ */
+union nf_conntrack_man_proto {
+	/* Add other protocols here. */
+	__be16 all;
+
+	struct {
+		__be16 port;
+	} tcp;
+	struct {
+		__be16 port;
+	} udp;
+	struct {
+		__be16 id;
+	} icmp;
+	struct {
+		__be16 port;
+	} dccp;
+	struct {
+		__be16 port;
+	} sctp;
+	struct {
+		__be16 key;	/* GRE key is 32bit, PPtP only uses 16bit */
+	} gre;
+};
+
 #define CTINFO2DIR(ctinfo) ((ctinfo) >= IP_CT_IS_REPLY ? IP_CT_DIR_REPLY : IP_CT_DIR_ORIGINAL)
 
 #endif /* _NF_CONNTRACK_TUPLE_COMMON_H */

include/linux/netfilter/nf_nat.h

···
+#ifndef _NETFILTER_NF_NAT_H
+#define _NETFILTER_NF_NAT_H
+
+#include <linux/netfilter.h>
+#include <linux/netfilter/nf_conntrack_tuple_common.h>
+
+#define NF_NAT_RANGE_MAP_IPS		1
+#define NF_NAT_RANGE_PROTO_SPECIFIED	2
+#define NF_NAT_RANGE_PROTO_RANDOM	4
+#define NF_NAT_RANGE_PERSISTENT		8
+
+struct nf_nat_ipv4_range {
+	unsigned int			flags;
+	__be32				min_ip;
+	__be32				max_ip;
+	union nf_conntrack_man_proto	min;
+	union nf_conntrack_man_proto	max;
+};
+
+struct nf_nat_ipv4_multi_range_compat {
+	unsigned int			rangesize;
+	struct nf_nat_ipv4_range	range[1];
+};
+
+#endif /* _NETFILTER_NF_NAT_H */

include/linux/netfilter/nfnetlink.h

···
 #define NFNL_SUBSYS_ULOG		4
 #define NFNL_SUBSYS_OSF			5
 #define NFNL_SUBSYS_IPSET		6
-#define NFNL_SUBSYS_COUNT		7
+#define NFNL_SUBSYS_ACCT		7
+#define NFNL_SUBSYS_COUNT		8
 
 #ifdef __KERNEL__
 

include/linux/netfilter/nfnetlink_acct.h

···
+#ifndef _NFNL_ACCT_H_
+#define _NFNL_ACCT_H_
+
+#ifndef NFACCT_NAME_MAX
+#define NFACCT_NAME_MAX		32
+#endif
+
+enum nfnl_acct_msg_types {
+	NFNL_MSG_ACCT_NEW,
+	NFNL_MSG_ACCT_GET,
+	NFNL_MSG_ACCT_GET_CTRZERO,
+	NFNL_MSG_ACCT_DEL,
+	NFNL_MSG_ACCT_MAX
+};
+
+enum nfnl_acct_type {
+	NFACCT_UNSPEC,
+	NFACCT_NAME,
+	NFACCT_PKTS,
+	NFACCT_BYTES,
+	NFACCT_USE,
+	__NFACCT_MAX
+};
+#define NFACCT_MAX (__NFACCT_MAX - 1)
+
+#ifdef __KERNEL__
+
+struct nf_acct;
+
+extern struct nf_acct *nfnl_acct_find_get(const char *filter_name);
+extern void nfnl_acct_put(struct nf_acct *acct);
+extern void nfnl_acct_update(const struct sk_buff *skb, struct nf_acct *nfacct);
+
+#endif /* __KERNEL__ */
+
+#endif /* _NFNL_ACCT_H */

include/linux/netfilter/xt_CT.h

···
 
 #include <linux/types.h>
 
-#define XT_CT_NOTRACK	0x1
+#define XT_CT_NOTRACK		0x1
+#define XT_CT_USERSPACE_HELPER	0x2
 
 struct xt_ct_target_info {
 	__u16 flags;

include/linux/netfilter/xt_nfacct.h

···
+#ifndef _XT_NFACCT_MATCH_H
+#define _XT_NFACCT_MATCH_H
+
+#include <linux/netfilter/nfnetlink_acct.h>
+
+struct nf_acct;
+
+struct xt_nfacct_match_info {
+	char		name[NFACCT_NAME_MAX];
+	struct nf_acct	*nfacct;
+};
+
+#endif /* _XT_NFACCT_MATCH_H */

include/linux/netfilter/xt_rpfilter.h

···
+#ifndef _XT_RPATH_H
+#define _XT_RPATH_H
+
+#include <linux/types.h>
+
+enum {
+	XT_RPFILTER_LOOSE = 1 << 0,
+	XT_RPFILTER_VALID_MARK = 1 << 1,
+	XT_RPFILTER_ACCEPT_LOCAL = 1 << 2,
+	XT_RPFILTER_INVERT = 1 << 3,
+#ifdef __KERNEL__
+	XT_RPFILTER_OPTION_MASK = XT_RPFILTER_LOOSE |
+				  XT_RPFILTER_VALID_MARK |
+				  XT_RPFILTER_ACCEPT_LOCAL |
+				  XT_RPFILTER_INVERT,
+#endif
+};
+
+struct xt_rpfilter_info {
+	__u8 flags;
+};
+
+#endif

include/linux/netfilter_ipv4/Kbuild

···
 header-y += ipt_ecn.h
 header-y += ipt_realm.h
 header-y += ipt_ttl.h
-header-y += nf_nat.h

include/linux/netfilter_ipv4/nf_nat.h

···
-#ifndef _LINUX_NF_NAT_H
-#define _LINUX_NF_NAT_H
-
-#include <linux/types.h>
-
-#define IP_NAT_RANGE_MAP_IPS 1
-#define IP_NAT_RANGE_PROTO_SPECIFIED 2
-#define IP_NAT_RANGE_PROTO_RANDOM 4
-#define IP_NAT_RANGE_PERSISTENT 8
-
-/* The protocol-specific manipulable parts of the tuple. */
-union nf_conntrack_man_proto {
-	/* Add other protocols here. */
-	__be16 all;
-
-	struct {
-		__be16 port;
-	} tcp;
-	struct {
-		__be16 port;
-	} udp;
-	struct {
-		__be16 id;
-	} icmp;
-	struct {
-		__be16 port;
-	} dccp;
-	struct {
-		__be16 port;
-	} sctp;
-	struct {
-		__be16 key;	/* GRE key is 32bit, PPtP only uses 16bit */
-	} gre;
-};
-
-/* Single range specification. */
-struct nf_nat_range {
-	/* Set to OR of flags above. */
-	unsigned int flags;
-
-	/* Inclusive: network order. */
-	__be32 min_ip, max_ip;
-
-	/* Inclusive: network order */
-	union nf_conntrack_man_proto min, max;
-};
-
-/* For backwards compat: don't use in modern code. */
-struct nf_nat_multi_range_compat {
-	unsigned int rangesize; /* Must be 1. */
-
-	/* hangs off end. */
-	struct nf_nat_range range[1];
-};
-
-#define nf_nat_multi_range nf_nat_multi_range_compat
-
-#endif

include/net/ip6_route.h

···
 extern struct dst_entry *	ip6_route_output(struct net *net,
 						 const struct sock *sk,
 						 struct flowi6 *fl6);
+extern struct dst_entry *	ip6_route_lookup(struct net *net,
+						 struct flowi6 *fl6, int flags);
 
 extern int			ip6_route_init(void);
 extern void			ip6_route_cleanup(void);

include/net/netfilter/nf_conntrack_acct.h

···
 #include <net/netfilter/nf_conntrack_extend.h>
 
 struct nf_conn_counter {
-	u_int64_t packets;
-	u_int64_t bytes;
+	atomic64_t packets;
+	atomic64_t bytes;
 };
 
 static inline

include/net/netfilter/nf_conntrack_expect.h

···
 
 void nf_ct_remove_expectations(struct nf_conn *ct);
 void nf_ct_unexpect_related(struct nf_conntrack_expect *exp);
-void nf_ct_remove_userspace_expectations(void);
 
 /* Allocate space for an expectation: this is mandatory before calling
    nf_ct_expect_related.  You will have to call put afterwards. */

include/net/netfilter/nf_conntrack_tuple.h

···
 
 #include <linux/netfilter/x_tables.h>
 #include <linux/netfilter/nf_conntrack_tuple_common.h>
-#include <linux/netfilter_ipv4/nf_nat.h>
 #include <linux/list_nulls.h>
 
 /* A `tuple' is a structure containing the information to uniquely

include/net/netfilter/nf_nat.h

···
 #ifndef _NF_NAT_H
 #define _NF_NAT_H
 #include <linux/netfilter_ipv4.h>
-#include <linux/netfilter_ipv4/nf_nat.h>
+#include <linux/netfilter/nf_nat.h>
 #include <net/netfilter/nf_conntrack_tuple.h>
 
-#define NF_NAT_MAPPING_TYPE_MAX_NAMELEN 16
-
 enum nf_nat_manip_type {
-	IP_NAT_MANIP_SRC,
-	IP_NAT_MANIP_DST
+	NF_NAT_MANIP_SRC,
+	NF_NAT_MANIP_DST
 };
 
 /* SRC manip occurs POST_ROUTING or LOCAL_IN */
···
 
 /* Set up the info structure to map into this range. */
 extern unsigned int nf_nat_setup_info(struct nf_conn *ct,
-				      const struct nf_nat_range *range,
+				      const struct nf_nat_ipv4_range *range,
 				      enum nf_nat_manip_type maniptype);
 
 /* Is this tuple already taken? (not by us)*/

include/net/netfilter/nf_nat_core.h

···
 static inline int nf_nat_initialized(struct nf_conn *ct,
 				     enum nf_nat_manip_type manip)
 {
-	if (manip == IP_NAT_MANIP_SRC)
+	if (manip == NF_NAT_MANIP_SRC)
 		return ct->status & IPS_SRC_NAT_DONE;
 	else
 		return ct->status & IPS_DST_NAT_DONE;

include/net/netfilter/nf_nat_protocol.h

···
 #include <net/netfilter/nf_nat.h>
 #include <linux/netfilter/nfnetlink_conntrack.h>
 
-struct nf_nat_range;
+struct nf_nat_ipv4_range;
 
 struct nf_nat_protocol {
 	/* Protocol number. */
 	unsigned int protonum;
-
-	struct module *me;
 
 	/* Translate a packet to the target according to manip type.
 	   Return true if succeeded. */
···
 	   possible.  Per-protocol part of tuple is initialized to the
 	   incoming packet. */
 	void (*unique_tuple)(struct nf_conntrack_tuple *tuple,
-			     const struct nf_nat_range *range,
+			     const struct nf_nat_ipv4_range *range,
 			     enum nf_nat_manip_type maniptype,
 			     const struct nf_conn *ct);
 
-	int (*range_to_nlattr)(struct sk_buff *skb,
-			       const struct nf_nat_range *range);
-
 	int (*nlattr_to_range)(struct nlattr *tb[],
-			       struct nf_nat_range *range);
+			       struct nf_nat_ipv4_range *range);
 };
 
 /* Protocol registration. */
···
 				  const union nf_conntrack_man_proto *max);
 
 extern void nf_nat_proto_unique_tuple(struct nf_conntrack_tuple *tuple,
-				      const struct nf_nat_range *range,
+				      const struct nf_nat_ipv4_range *range,
 				      enum nf_nat_manip_type maniptype,
 				      const struct nf_conn *ct,
 				      u_int16_t *rover);
 
-extern int nf_nat_proto_range_to_nlattr(struct sk_buff *skb,
-					const struct nf_nat_range *range);
 extern int nf_nat_proto_nlattr_to_range(struct nlattr *tb[],
-					struct nf_nat_range *range);
+					struct nf_nat_ipv4_range *range);
 
 #endif /*_NF_NAT_PROTO_H*/

net/ipv4/fib_rules.c

···
 
 	return err;
 }
+EXPORT_SYMBOL_GPL(fib_lookup);
 
 static int fib4_rule_action(struct fib_rule *rule, struct flowi *flp,
 			    int flags, struct fib_lookup_arg *arg)

net/ipv4/fib_trie.c

···
 	rcu_read_unlock();
 	return ret;
 }
+EXPORT_SYMBOL_GPL(fib_table_lookup);
 
 /*
  * Remove the leaf and return parent.

net/ipv4/netfilter/Kconfig

···
 
 	  To compile it as a module, choose M here.  If unsure, say N.
 
+config IP_NF_MATCH_RPFILTER
+	tristate '"rpfilter" reverse path filter match support'
+	depends on NETFILTER_ADVANCED
+	---help---
+	  This option allows you to match packets whose replies would
+	  go out via the interface the packet came in.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+	  The module will be called ipt_rpfilter.
+
 config IP_NF_MATCH_TTL
 	tristate '"ttl" match support'
 	depends on NETFILTER_ADVANCED

net/ipv4/netfilter/Makefile

···
 # matches
 obj-$(CONFIG_IP_NF_MATCH_AH) += ipt_ah.o
 obj-$(CONFIG_IP_NF_MATCH_ECN) += ipt_ecn.o
+obj-$(CONFIG_IP_NF_MATCH_RPFILTER) += ipt_rpfilter.o
 
 # targets
 obj-$(CONFIG_IP_NF_TARGET_CLUSTERIP) += ipt_CLUSTERIP.o

net/ipv4/netfilter/ipt_MASQUERADE.c

···
 /* FIXME: Multiple targets. --RR */
 static int masquerade_tg_check(const struct xt_tgchk_param *par)
 {
-	const struct nf_nat_multi_range_compat *mr = par->targinfo;
+	const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
 
-	if (mr->range[0].flags & IP_NAT_RANGE_MAP_IPS) {
+	if (mr->range[0].flags & NF_NAT_RANGE_MAP_IPS) {
 		pr_debug("bad MAP_IPS.\n");
 		return -EINVAL;
 	}
···
 	struct nf_conn *ct;
 	struct nf_conn_nat *nat;
 	enum ip_conntrack_info ctinfo;
-	struct nf_nat_range newrange;
-	const struct nf_nat_multi_range_compat *mr;
+	struct nf_nat_ipv4_range newrange;
+	const struct nf_nat_ipv4_multi_range_compat *mr;
 	const struct rtable *rt;
 	__be32 newsrc;
 
···
 	nat->masq_index = par->out->ifindex;
 
 	/* Transfer from original range. */
-	newrange = ((struct nf_nat_range)
-		{ mr->range[0].flags | IP_NAT_RANGE_MAP_IPS,
+	newrange = ((struct nf_nat_ipv4_range)
+		{ mr->range[0].flags | NF_NAT_RANGE_MAP_IPS,
 		  newsrc, newsrc,
 		  mr->range[0].min, mr->range[0].max });
 
 	/* Hand modified range to generic setup. */
-	return nf_nat_setup_info(ct, &newrange, IP_NAT_MANIP_SRC);
+	return nf_nat_setup_info(ct, &newrange, NF_NAT_MANIP_SRC);
 }
 
 static int
···
 	.name		= "MASQUERADE",
 	.family		= NFPROTO_IPV4,
 	.target		= masquerade_tg,
-	.targetsize	= sizeof(struct nf_nat_multi_range_compat),
+	.targetsize	= sizeof(struct nf_nat_ipv4_multi_range_compat),
 	.table		= "nat",
 	.hooks		= 1 << NF_INET_POST_ROUTING,
 	.checkentry	= masquerade_tg_check,

net/ipv4/netfilter/ipt_NETMAP.c

···
 
 static int netmap_tg_check(const struct xt_tgchk_param *par)
 {
-	const struct nf_nat_multi_range_compat *mr = par->targinfo;
+	const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
 
-	if (!(mr->range[0].flags & IP_NAT_RANGE_MAP_IPS)) {
+	if (!(mr->range[0].flags & NF_NAT_RANGE_MAP_IPS)) {
 		pr_debug("bad MAP_IPS.\n");
 		return -EINVAL;
 	}
···
 	struct nf_conn *ct;
 	enum ip_conntrack_info ctinfo;
 	__be32 new_ip, netmask;
-	const struct nf_nat_multi_range_compat *mr = par->targinfo;
-	struct nf_nat_range newrange;
+	const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
+	struct nf_nat_ipv4_range newrange;
 
 	NF_CT_ASSERT(par->hooknum == NF_INET_PRE_ROUTING ||
 		     par->hooknum == NF_INET_POST_ROUTING ||
···
 		new_ip = ip_hdr(skb)->saddr & ~netmask;
 	new_ip |= mr->range[0].min_ip & netmask;
 
-	newrange = ((struct nf_nat_range)
-		{ mr->range[0].flags | IP_NAT_RANGE_MAP_IPS,
+	newrange = ((struct nf_nat_ipv4_range)
+		{ mr->range[0].flags | NF_NAT_RANGE_MAP_IPS,
 		  new_ip, new_ip,
 		  mr->range[0].min, mr->range[0].max });
 
···
 	.name 		= "NETMAP",
 	.family		= NFPROTO_IPV4,
 	.target 	= netmap_tg,
-	.targetsize	= sizeof(struct nf_nat_multi_range_compat),
+	.targetsize	= sizeof(struct nf_nat_ipv4_multi_range_compat),
 	.table		= "nat",
 	.hooks		= (1 << NF_INET_PRE_ROUTING) |
 			  (1 << NF_INET_POST_ROUTING) |

net/ipv4/netfilter/ipt_REDIRECT.c

···
 /* FIXME: Take multiple ranges --RR */
 static int redirect_tg_check(const struct xt_tgchk_param *par)
 {
-	const struct nf_nat_multi_range_compat *mr = par->targinfo;
+	const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
 
-	if (mr->range[0].flags & IP_NAT_RANGE_MAP_IPS) {
+	if (mr->range[0].flags & NF_NAT_RANGE_MAP_IPS) {
 		pr_debug("bad MAP_IPS.\n");
 		return -EINVAL;
 	}
···
 	struct nf_conn *ct;
 	enum ip_conntrack_info ctinfo;
 	__be32 newdst;
-	const struct nf_nat_multi_range_compat *mr = par->targinfo;
-	struct nf_nat_range newrange;
+	const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
+	struct nf_nat_ipv4_range newrange;
 
 	NF_CT_ASSERT(par->hooknum == NF_INET_PRE_ROUTING ||
 		     par->hooknum == NF_INET_LOCAL_OUT);
···
 	}
 
 	/* Transfer from original range. */
-	newrange = ((struct nf_nat_range)
-		{ mr->range[0].flags | IP_NAT_RANGE_MAP_IPS,
+	newrange = ((struct nf_nat_ipv4_range)
+		{ mr->range[0].flags | NF_NAT_RANGE_MAP_IPS,
 		  newdst, newdst,
 		  mr->range[0].min, mr->range[0].max });
 
 	/* Hand modified range to generic setup. */
-	return nf_nat_setup_info(ct, &newrange, IP_NAT_MANIP_DST);
+	return nf_nat_setup_info(ct, &newrange, NF_NAT_MANIP_DST);
 }
 
 static struct xt_target redirect_tg_reg __read_mostly = {
 	.name		= "REDIRECT",
 	.family		= NFPROTO_IPV4,
 	.target		= redirect_tg,
-	.targetsize	= sizeof(struct nf_nat_multi_range_compat),
+	.targetsize	= sizeof(struct nf_nat_ipv4_multi_range_compat),
 	.table		= "nat",
 	.hooks		= (1 << NF_INET_PRE_ROUTING) | (1 << NF_INET_LOCAL_OUT),
 	.checkentry	= redirect_tg_check,

net/ipv4/netfilter/ipt_rpfilter.c

···
+/*
+ * Copyright (c) 2011 Florian Westphal <[e-mail]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * based on fib_frontend.c; Author: Alexey Kuznetsov, <[e-mail]>
+ */
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/ip.h>
+#include <net/ip.h>
+#include <net/ip_fib.h>
+#include <net/route.h>
+
+#include <linux/netfilter/xt_rpfilter.h>
+#include <linux/netfilter/x_tables.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Florian Westphal <[e-mail]>");
+MODULE_DESCRIPTION("iptables: ipv4 reverse path filter match");
+
+/* don't try to find route from mcast/bcast/zeronet */
+static __be32 rpfilter_get_saddr(__be32 addr)
+{
+	if (ipv4_is_multicast(addr) || ipv4_is_lbcast(addr) ||
+	    ipv4_is_zeronet(addr))
+		return 0;
+	return addr;
+}
+
+static bool rpfilter_lookup_reverse(struct flowi4 *fl4,
+				const struct net_device *dev, u8 flags)
+{
+	struct fib_result res;
+	bool dev_match;
+	struct net *net = dev_net(dev);
+	int ret __maybe_unused;
+
+	if (fib_lookup(net, fl4, &res))
+		return false;
+
+	if (res.type != RTN_UNICAST) {
+		if (res.type != RTN_LOCAL || !(flags & XT_RPFILTER_ACCEPT_LOCAL))
+			return false;
+	}
+	dev_match = false;
+#ifdef CONFIG_IP_ROUTE_MULTIPATH
+	for (ret = 0; ret < res.fi->fib_nhs; ret++) {
+		struct fib_nh *nh = &res.fi->fib_nh[ret];
+
+		if (nh->nh_dev == dev) {
+			dev_match = true;
+			break;
+		}
+	}
+#else
+	if (FIB_RES_DEV(res) == dev)
+		dev_match = true;
+#endif
+	if (dev_match || flags & XT_RPFILTER_LOOSE)
+		return FIB_RES_NH(res).nh_scope <= RT_SCOPE_HOST;
+	return dev_match;
+}
+
+static bool rpfilter_mt(const struct sk_buff *skb, struct xt_action_param *par)
+{
+	const struct xt_rpfilter_info *info;
+	const struct iphdr *iph;
+	struct flowi4 flow;
+	bool invert;
+
+	info = par->matchinfo;
+	invert = info->flags & XT_RPFILTER_INVERT;
+
+	if (par->in->flags & IFF_LOOPBACK)
+		return true ^ invert;
+
+	iph = ip_hdr(skb);
+	if (ipv4_is_multicast(iph->daddr)) {
+		if (ipv4_is_zeronet(iph->saddr))
+			return ipv4_is_local_multicast(iph->daddr) ^ invert;
+		flow.flowi4_iif = 0;
+	} else {
+		flow.flowi4_iif = dev_net(par->in)->loopback_dev->ifindex;
+	}
+
+	flow.daddr = iph->saddr;
+	flow.saddr = rpfilter_get_saddr(iph->daddr);
+	flow.flowi4_oif = 0;
+	flow.flowi4_mark = info->flags & XT_RPFILTER_VALID_MARK ? skb->mark : 0;
+	flow.flowi4_tos = RT_TOS(iph->tos);
+	flow.flowi4_scope = RT_SCOPE_UNIVERSE;
+
+	return rpfilter_lookup_reverse(&flow, par->in, info->flags) ^ invert;
+}
+
+static int rpfilter_check(const struct xt_mtchk_param *par)
+{
+	const struct xt_rpfilter_info *info = par->matchinfo;
+	unsigned int options = ~XT_RPFILTER_OPTION_MASK;
+	if (info->flags & options) {
+		pr_info("unknown options encountered");
+		return -EINVAL;
+	}
+
+	if (strcmp(par->table, "mangle") != 0 &&
+	    strcmp(par->table, "raw") != 0) {
+		pr_info("match only valid in the \'raw\' "
+			"or \'mangle\' tables, not \'%s\'.\n", par->table);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static struct xt_match rpfilter_mt_reg __read_mostly = {
+	.name		= "rpfilter",
+	.family		= NFPROTO_IPV4,
+	.checkentry	= rpfilter_check,
+	.match		= rpfilter_mt,
+	.matchsize	= sizeof(struct xt_rpfilter_info),
+	.hooks		= (1 << NF_INET_PRE_ROUTING),
+	.me		= THIS_MODULE
+};
+
+static int __init rpfilter_mt_init(void)
+{
+	return xt_register_match(&rpfilter_mt_reg);
+}
+
+static void __exit rpfilter_mt_exit(void)
+{
+	xt_unregister_match(&rpfilter_mt_reg);
+}
+
+module_init(rpfilter_mt_init);
+module_exit(rpfilter_mt_exit);

net/ipv4/netfilter/nf_nat_core.c

···
 #include <net/netfilter/nf_nat_helper.h>
 #include <net/netfilter/nf_conntrack_helper.h>
 #include <net/netfilter/nf_conntrack_l3proto.h>
-#include <net/netfilter/nf_conntrack_l4proto.h>
 #include <net/netfilter/nf_conntrack_zones.h>
 
 static DEFINE_SPINLOCK(nf_nat_lock);
···
 	/* Original src, to ensure we map it consistently if poss. */
 	hash = jhash_3words((__force u32)tuple->src.u3.ip,
 			    (__force u32)tuple->src.u.all ^ zone,
-			    tuple->dst.protonum, 0);
+			    tuple->dst.protonum, nf_conntrack_hash_rnd);
 	return ((u64)hash * net->ipv4.nat_htable_size) >> 32;
 }
 
···
  * that meet the constraints of range. */
 static int
 in_range(const struct nf_conntrack_tuple *tuple,
-	 const struct nf_nat_range *range)
+	 const struct nf_nat_ipv4_range *range)
 {
 	const struct nf_nat_protocol *proto;
 	int ret = 0;
 
 	/* If we are supposed to map IPs, then we must be in the
 	   range specified, otherwise let this drag us onto a new src IP. */
-	if (range->flags & IP_NAT_RANGE_MAP_IPS) {
+	if (range->flags & NF_NAT_RANGE_MAP_IPS) {
 		if (ntohl(tuple->src.u3.ip) < ntohl(range->min_ip) ||
 		    ntohl(tuple->src.u3.ip) > ntohl(range->max_ip))
 			return 0;
···
 
 	rcu_read_lock();
 	proto = __nf_nat_proto_find(tuple->dst.protonum);
-	if (!(range->flags & IP_NAT_RANGE_PROTO_SPECIFIED) ||
-	    proto->in_range(tuple, IP_NAT_MANIP_SRC,
+	if (!(range->flags & NF_NAT_RANGE_PROTO_SPECIFIED) ||
+	    proto->in_range(tuple, NF_NAT_MANIP_SRC,
 			    &range->min, &range->max))
 		ret = 1;
 	rcu_read_unlock();
···
 find_appropriate_src(struct net *net, u16 zone,
 		     const struct nf_conntrack_tuple *tuple,
 		     struct nf_conntrack_tuple *result,
-		     const struct nf_nat_range *range)
+		     const struct nf_nat_ipv4_range *range)
 {
 	unsigned int h = hash_by_src(net, zone, tuple);
 	const struct nf_conn_nat *nat;
···
 */
 static void
 find_best_ips_proto(u16 zone, struct nf_conntrack_tuple *tuple,
-		    const struct nf_nat_range *range,
+		    const struct nf_nat_ipv4_range *range,
 		    const struct nf_conn *ct,
 		    enum nf_nat_manip_type maniptype)
 {
···
 	u_int32_t minip, maxip, j;
 
 	/* No IP mapping?  Do nothing. */
-	if (!(range->flags & IP_NAT_RANGE_MAP_IPS))
+	if (!(range->flags & NF_NAT_RANGE_MAP_IPS))
 		return;
 
-	if (maniptype == IP_NAT_MANIP_SRC)
+	if (maniptype == NF_NAT_MANIP_SRC)
 		var_ipp = &tuple->src.u3.ip;
 	else
 		var_ipp = &tuple->dst.u3.ip;
···
 	minip = ntohl(range->min_ip);
 	maxip = ntohl(range->max_ip);
 	j = jhash_2words((__force u32)tuple->src.u3.ip,
-			 range->flags & IP_NAT_RANGE_PERSISTENT ?
+			 range->flags & NF_NAT_RANGE_PERSISTENT ?
 				0 : (__force u32)tuple->dst.u3.ip ^ zone, 0);
 	j = ((u64)j * (maxip - minip + 1)) >> 32;
 	*var_ipp = htonl(minip + j);
···
 static void
 get_unique_tuple(struct nf_conntrack_tuple *tuple,
 		 const struct nf_conntrack_tuple *orig_tuple,
-		 const struct nf_nat_range *range,
+		 const struct nf_nat_ipv4_range *range,
 		 struct nf_conn *ct,
 		 enum nf_nat_manip_type maniptype)
 {
···
 	   This is only required for source (ie. NAT/masq) mappings.
 	   So far, we don't do local source mappings, so multiple
 	   manips not an issue.  */
-	if (maniptype == IP_NAT_MANIP_SRC &&
-	    !(range->flags & IP_NAT_RANGE_PROTO_RANDOM)) {
+	if (maniptype == NF_NAT_MANIP_SRC &&
+	    !(range->flags & NF_NAT_RANGE_PROTO_RANDOM)) {
 		/* try the original tuple first */
 		if (in_range(orig_tuple, range)) {
 			if (!nf_nat_used_tuple(orig_tuple, ct)) {
···
 	proto = __nf_nat_proto_find(orig_tuple->dst.protonum);
 
 	/* Only bother mapping if it's not already in range and unique */
-	if (!(range->flags & IP_NAT_RANGE_PROTO_RANDOM)) {
-		if (range->flags & IP_NAT_RANGE_PROTO_SPECIFIED) {
+	if (!(range->flags & NF_NAT_RANGE_PROTO_RANDOM)) {
+		if (range->flags & NF_NAT_RANGE_PROTO_SPECIFIED) {
 			if (proto->in_range(tuple, maniptype, &range->min,
 					    &range->max) &&
 			    (range->min.all == range->max.all ||
···
 
 unsigned int
 nf_nat_setup_info(struct nf_conn *ct,
-		  const struct nf_nat_range *range,
+		  const struct nf_nat_ipv4_range *range,
 		  enum nf_nat_manip_type maniptype)
 {
 	struct net *net = nf_ct_net(ct);
···
 		}
 	}
 
-	NF_CT_ASSERT(maniptype == IP_NAT_MANIP_SRC ||
-		     maniptype == IP_NAT_MANIP_DST);
+	NF_CT_ASSERT(maniptype == NF_NAT_MANIP_SRC ||
+		     maniptype == NF_NAT_MANIP_DST);
 	BUG_ON(nf_nat_initialized(ct, maniptype));
 
 	/* What we've got will look like inverse of reply. Normally
···
 		nf_conntrack_alter_reply(ct, &reply);
 
 		/* Non-atomic: we own this at the moment. */
-		if (maniptype == IP_NAT_MANIP_SRC)
+		if (maniptype == NF_NAT_MANIP_SRC)
 			ct->status |= IPS_SRC_NAT;
 		else
 			ct->status |= IPS_DST_NAT;
 	}
 
-	if (maniptype == IP_NAT_MANIP_SRC) {
+	if (maniptype == NF_NAT_MANIP_SRC) {
 		unsigned int srchash;
 
 		srchash = hash_by_src(net, nf_ct_zone(ct),
···
 	}
 
 	/* It's done. */
-	if (maniptype == IP_NAT_MANIP_DST)
+	if (maniptype == NF_NAT_MANIP_DST)
 		ct->status |= IPS_DST_NAT_DONE;
 	else
 		ct->status |= IPS_SRC_NAT_DONE;
···
 
 	iph = (void *)skb->data + iphdroff;
 
-	if (maniptype == IP_NAT_MANIP_SRC) {
+	if (maniptype == NF_NAT_MANIP_SRC) {
 		csum_replace4(&iph->check, iph->saddr, target->src.u3.ip);
 		iph->saddr = target->src.u3.ip;
 	} else {
···
 	unsigned long statusbit;
 	enum nf_nat_manip_type mtype = HOOK2MANIP(hooknum);
 
-	if (mtype == IP_NAT_MANIP_SRC)
+	if (mtype == NF_NAT_MANIP_SRC)
 		statusbit = IPS_SRC_NAT;
 	else
 		statusbit = IPS_DST_NAT;
···
 		struct icmphdr icmp;
 		struct iphdr ip;
 	} *inside;
-	const struct nf_conntrack_l4proto *l4proto;
-	struct nf_conntrack_tuple inner, target;
+	struct nf_conntrack_tuple target;
 	int hdrlen = ip_hdrlen(skb);
 	enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
 	unsigned long statusbit;
···
 			return 0;
 	}
 
-	if (manip == IP_NAT_MANIP_SRC)
+	if (manip == NF_NAT_MANIP_SRC)
 		statusbit = IPS_SRC_NAT;
 	else
 		statusbit = IPS_DST_NAT;
···
 	pr_debug("icmp_reply_translation: translating error %p manip %u "
 		 "dir %s\n", skb, manip,
 		 dir == IP_CT_DIR_ORIGINAL ? "ORIG" : "REPLY");
-
-	/* rcu_read_lock()ed by nf_hook_slow */
-	l4proto = __nf_ct_l4proto_find(PF_INET, inside->ip.protocol);
-
-	if (!nf_ct_get_tuple(skb, hdrlen + sizeof(struct icmphdr),
-			     (hdrlen +
-			      sizeof(struct icmphdr) + inside->ip.ihl * 4),
-			     (u_int16_t)AF_INET, inside->ip.protocol,
-			     &inner, l3proto, l4proto))
-		return 0;
 
 	/* Change inner back to look like incoming packet.  We do the
 	   opposite manip on this hook to normal, because it might not
···
 #include <linux/netfilter/nfnetlink.h>
 #include <linux/netfilter/nfnetlink_conntrack.h>
 
-static const struct nf_nat_protocol *
-nf_nat_proto_find_get(u_int8_t protonum)
-{
-	const struct nf_nat_protocol *p;
-
-	rcu_read_lock();
-	p = __nf_nat_proto_find(protonum);
-	if (!try_module_get(p->me))
-		p = &nf_nat_unknown_protocol;
-	rcu_read_unlock();
-
-	return p;
-}
-
-static void
-nf_nat_proto_put(const struct nf_nat_protocol *p)
-{
-	module_put(p->me);
-}
-
 static const struct nla_policy protonat_nla_policy[CTA_PROTONAT_MAX+1] = {
 	[CTA_PROTONAT_PORT_MIN]	= { .type = NLA_U16 },
 	[CTA_PROTONAT_PORT_MAX]	= { .type = NLA_U16 },
···
 
 static int nfnetlink_parse_nat_proto(struct nlattr *attr,
 				     const struct nf_conn *ct,
-				     struct nf_nat_range *range)
+				     struct nf_nat_ipv4_range *range)
 {
 	struct nlattr *tb[CTA_PROTONAT_MAX+1];
 	const struct nf_nat_protocol *npt;
···
 	if (err < 0)
 		return err;
 
-	npt = nf_nat_proto_find_get(nf_ct_protonum(ct));
+	rcu_read_lock();
+	npt = __nf_nat_proto_find(nf_ct_protonum(ct));
 	if (npt->nlattr_to_range)
 		err = npt->nlattr_to_range(tb, range);
-	nf_nat_proto_put(npt);
+	rcu_read_unlock();
 	return err;
 }
 
 static const struct nla_policy nat_nla_policy[CTA_NAT_MAX+1] = {
 	[CTA_NAT_MINIP]		= { .type = NLA_U32 },
 	[CTA_NAT_MAXIP]		= { .type = NLA_U32 },
+	[CTA_NAT_PROTO]		= { .type = NLA_NESTED },
 };
 
 static int
 nfnetlink_parse_nat(const struct nlattr *nat,
-		    const struct nf_conn *ct, struct nf_nat_range *range)
+		    const struct nf_conn *ct, struct nf_nat_ipv4_range *range)
 {
 	struct nlattr *tb[CTA_NAT_MAX+1];
 	int err;
···
 		range->max_ip = nla_get_be32(tb[CTA_NAT_MAXIP]);
 
 	if (range->min_ip)
-		range->flags |= IP_NAT_RANGE_MAP_IPS;
+		range->flags |= NF_NAT_RANGE_MAP_IPS;
 
 	if (!tb[CTA_NAT_PROTO])
 		return 0;
···
 			  enum nf_nat_manip_type manip,
 			  const struct nlattr *attr)
 {
-	struct nf_nat_range range;
+	struct nf_nat_ipv4_range range;
 
 	if (nfnetlink_parse_nat(attr, ct, &range) < 0)
 		return -EINVAL;

net/ipv4/netfilter/nf_nat_h323.c

···
 static void ip_nat_q931_expect(struct nf_conn *new,
 			       struct nf_conntrack_expect *this)
 {
-	struct nf_nat_range range;
+	struct nf_nat_ipv4_range range;
 
 	if (this->tuple.src.u3.ip != 0) {	/* Only accept calls from GK */
 		nf_nat_follow_master(new, this);
···
 	BUG_ON(new->status & IPS_NAT_DONE_MASK);
 
 	/* Change src to where master sends to */
-	range.flags = IP_NAT_RANGE_MAP_IPS;
+	range.flags = NF_NAT_RANGE_MAP_IPS;
 	range.min_ip = range.max_ip = new->tuplehash[!this->dir].tuple.src.u3.ip;
-	nf_nat_setup_info(new, &range, IP_NAT_MANIP_SRC);
+	nf_nat_setup_info(new, &range, NF_NAT_MANIP_SRC);
 
 	/* For DST manip, map port here to where it's expected. */
-	range.flags = (IP_NAT_RANGE_MAP_IPS | IP_NAT_RANGE_PROTO_SPECIFIED);
+	range.flags = (NF_NAT_RANGE_MAP_IPS | NF_NAT_RANGE_PROTO_SPECIFIED);
 	range.min = range.max = this->saved_proto;
 	range.min_ip = range.max_ip =
 	    new->master->tuplehash[!this->dir].tuple.src.u3.ip;
-	nf_nat_setup_info(new, &range, IP_NAT_MANIP_DST);
+	nf_nat_setup_info(new, &range, NF_NAT_MANIP_DST);
 }
 
 /****************************************************************************/
···
 static void ip_nat_callforwarding_expect(struct nf_conn *new,
 					 struct nf_conntrack_expect *this)
 {
-	struct nf_nat_range range;
+	struct nf_nat_ipv4_range range;
 
 	/* This must be a fresh one. */
 	BUG_ON(new->status & IPS_NAT_DONE_MASK);
 
 	/* Change src to where master sends to */
-	range.flags = IP_NAT_RANGE_MAP_IPS;
+	range.flags = NF_NAT_RANGE_MAP_IPS;
 	range.min_ip = range.max_ip = new->tuplehash[!this->dir].tuple.src.u3.ip;
-	nf_nat_setup_info(new, &range, IP_NAT_MANIP_SRC);
+	nf_nat_setup_info(new, &range, NF_NAT_MANIP_SRC);
 
 	/* For DST manip, map port here to where it's expected. */
-	range.flags = (IP_NAT_RANGE_MAP_IPS | IP_NAT_RANGE_PROTO_SPECIFIED);
+	range.flags = (NF_NAT_RANGE_MAP_IPS | NF_NAT_RANGE_PROTO_SPECIFIED);
 	range.min = range.max = this->saved_proto;
 	range.min_ip = range.max_ip = this->saved_ip;
-	nf_nat_setup_info(new, &range, IP_NAT_MANIP_DST);
+	nf_nat_setup_info(new, &range, NF_NAT_MANIP_DST);
 }
 
 /****************************************************************************/

net/ipv4/netfilter/nf_nat_helper.c

···
 	struct udphdr *udph;
 	int datalen, oldlen;
 
-	/* UDP helpers might accidentally mangle the wrong packet */
-	iph = ip_hdr(skb);
-	if (skb->len < iph->ihl*4 + sizeof(*udph) +
-			       match_offset + match_len)
-		return 0;
-
 	if (!skb_make_writable(skb, skb->len))
 		return 0;
 
···
 void nf_nat_follow_master(struct nf_conn *ct,
 			  struct nf_conntrack_expect *exp)
 {
-	struct nf_nat_range range;
+	struct nf_nat_ipv4_range range;
 
 	/* This must be a fresh one. */
 	BUG_ON(ct->status & IPS_NAT_DONE_MASK);
 
 	/* Change src to where master sends to */
-	range.flags = IP_NAT_RANGE_MAP_IPS;
+	range.flags = NF_NAT_RANGE_MAP_IPS;
 	range.min_ip = range.max_ip
 		= ct->master->tuplehash[!exp->dir].tuple.dst.u3.ip;
-	nf_nat_setup_info(ct, &range, IP_NAT_MANIP_SRC);
+	nf_nat_setup_info(ct, &range, NF_NAT_MANIP_SRC);
 
 	/* For DST manip, map port here to where it's expected. */
-	range.flags = (IP_NAT_RANGE_MAP_IPS | IP_NAT_RANGE_PROTO_SPECIFIED);
+	range.flags = (NF_NAT_RANGE_MAP_IPS | NF_NAT_RANGE_PROTO_SPECIFIED);
 	range.min = range.max = exp->saved_proto;
 	range.min_ip = range.max_ip
 		= ct->master->tuplehash[!exp->dir].tuple.src.u3.ip;
-	nf_nat_setup_info(ct, &range, IP_NAT_MANIP_DST);
+	nf_nat_setup_info(ct, &range, NF_NAT_MANIP_DST);
 }
 EXPORT_SYMBOL(nf_nat_follow_master);

net/ipv4/netfilter/nf_nat_pptp.c

···
 	struct nf_conntrack_tuple t;
 	const struct nf_ct_pptp_master *ct_pptp_info;
 	const struct nf_nat_pptp *nat_pptp_info;
-	struct nf_nat_range range;
+	struct nf_nat_ipv4_range range;
 
 	ct_pptp_info = &nfct_help(master)->help.ct_pptp_info;
 	nat_pptp_info = &nfct_nat(master)->help.nat_pptp_info;
···
 	BUG_ON(ct->status & IPS_NAT_DONE_MASK);
 
 	/* Change src to where master sends to */
-	range.flags = IP_NAT_RANGE_MAP_IPS;
+	range.flags = NF_NAT_RANGE_MAP_IPS;
 	range.min_ip = range.max_ip
 		= ct->master->tuplehash[!exp->dir].tuple.dst.u3.ip;
 	if (exp->dir == IP_CT_DIR_ORIGINAL) {
-		range.flags |= IP_NAT_RANGE_PROTO_SPECIFIED;
+		range.flags |= NF_NAT_RANGE_PROTO_SPECIFIED;
 		range.min = range.max = exp->saved_proto;
 	}
-	nf_nat_setup_info(ct, &range, IP_NAT_MANIP_SRC);
+	nf_nat_setup_info(ct, &range, NF_NAT_MANIP_SRC);
 
 	/* For DST manip, map port here to where it's expected. */
-	range.flags = IP_NAT_RANGE_MAP_IPS;
+	range.flags = NF_NAT_RANGE_MAP_IPS;
 	range.min_ip = range.max_ip
 		= ct->master->tuplehash[!exp->dir].tuple.src.u3.ip;
 	if (exp->dir == IP_CT_DIR_REPLY) {
-		range.flags |= IP_NAT_RANGE_PROTO_SPECIFIED;
+		range.flags |= NF_NAT_RANGE_PROTO_SPECIFIED;
 		range.min = range.max = exp->saved_proto;
 	}
-	nf_nat_setup_info(ct, &range, IP_NAT_MANIP_DST);
+	nf_nat_setup_info(ct, &range, NF_NAT_MANIP_DST);
 }
 
 /* outbound packets == from PNS to PAC */

net/ipv4/netfilter/nf_nat_proto_common.c

···
 {
 	__be16 port;
 
-	if (maniptype == IP_NAT_MANIP_SRC)
+	if (maniptype == NF_NAT_MANIP_SRC)
 		port = tuple->src.u.all;
 	else
 		port = tuple->dst.u.all;
···
 EXPORT_SYMBOL_GPL(nf_nat_proto_in_range);
 
 void nf_nat_proto_unique_tuple(struct nf_conntrack_tuple *tuple,
-			       const struct nf_nat_range *range,
+			       const struct nf_nat_ipv4_range *range,
 			       enum nf_nat_manip_type maniptype,
 			       const struct nf_conn *ct,
 			       u_int16_t *rover)
···
 	__be16 *portptr;
 	u_int16_t off;
 
-	if (maniptype == IP_NAT_MANIP_SRC)
+	if (maniptype == NF_NAT_MANIP_SRC)
 		portptr = &tuple->src.u.all;
 	else
 		portptr = &tuple->dst.u.all;
 
 	/* If no range specified... */
-	if (!(range->flags & IP_NAT_RANGE_PROTO_SPECIFIED)) {
+	if (!(range->flags & NF_NAT_RANGE_PROTO_SPECIFIED)) {
 		/* If it's dst rewrite, can't change port */
-		if (maniptype == IP_NAT_MANIP_DST)
+		if (maniptype == NF_NAT_MANIP_DST)
 			return;
 
 		if (ntohs(*portptr) < 1024) {
···
 		range_size = ntohs(range->max.all) - min + 1;
 	}
 
-	if (range->flags & IP_NAT_RANGE_PROTO_RANDOM)
+	if (range->flags & NF_NAT_RANGE_PROTO_RANDOM)
 		off = secure_ipv4_port_ephemeral(tuple->src.u3.ip, tuple->dst.u3.ip,
-						 maniptype == IP_NAT_MANIP_SRC
+						 maniptype == NF_NAT_MANIP_SRC
 						 ? tuple->dst.u.all
 						 : tuple->src.u.all);
 	else
···
 		*portptr = htons(min + off % range_size);
 		if (++i != range_size && nf_nat_used_tuple(tuple, ct))
 			continue;
-		if (!(range->flags & IP_NAT_RANGE_PROTO_RANDOM))
+		if (!(range->flags & NF_NAT_RANGE_PROTO_RANDOM))
 			*rover = off;
 		return;
 	}
···
 EXPORT_SYMBOL_GPL(nf_nat_proto_unique_tuple);
 
 #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
-int nf_nat_proto_range_to_nlattr(struct sk_buff *skb,
-				 const struct nf_nat_range *range)
-{
-	NLA_PUT_BE16(skb, CTA_PROTONAT_PORT_MIN, range->min.all);
-	NLA_PUT_BE16(skb, CTA_PROTONAT_PORT_MAX, range->max.all);
-	return 0;
-
-nla_put_failure:
-	return -1;
-}
-EXPORT_SYMBOL_GPL(nf_nat_proto_nlattr_to_range);
-
 int nf_nat_proto_nlattr_to_range(struct nlattr *tb[],
-				 struct nf_nat_range *range)
+				 struct nf_nat_ipv4_range *range)
 {
 	if (tb[CTA_PROTONAT_PORT_MIN]) {
 		range->min.all = nla_get_be16(tb[CTA_PROTONAT_PORT_MIN]);
 		range->max.all = range->min.tcp.port;
-		range->flags |= IP_NAT_RANGE_PROTO_SPECIFIED;
+		range->flags |= NF_NAT_RANGE_PROTO_SPECIFIED;
 	}
 	if (tb[CTA_PROTONAT_PORT_MAX]) {
 		range->max.all = nla_get_be16(tb[CTA_PROTONAT_PORT_MAX]);
-		range->flags |= IP_NAT_RANGE_PROTO_SPECIFIED;
+		range->flags |= NF_NAT_RANGE_PROTO_SPECIFIED;
 	}
 	return 0;
 }
-EXPORT_SYMBOL_GPL(nf_nat_proto_range_to_nlattr);
+EXPORT_SYMBOL_GPL(nf_nat_proto_nlattr_to_range);
 #endif

net/ipv4/netfilter/nf_nat_proto_dccp.c

···
 
 static void
 dccp_unique_tuple(struct nf_conntrack_tuple *tuple,
-		  const struct nf_nat_range *range,
+		  const struct nf_nat_ipv4_range *range,
 		  enum nf_nat_manip_type maniptype,
 		  const struct nf_conn *ct)
 {
···
 	iph = (struct iphdr *)(skb->data + iphdroff);
 	hdr = (struct dccp_hdr *)(skb->data + hdroff);
 
-	if (maniptype == IP_NAT_MANIP_SRC) {
+	if (maniptype == NF_NAT_MANIP_SRC) {
 		oldip = iph->saddr;
 		newip = tuple->src.u3.ip;
 		newport = tuple->src.u.dccp.port;
···
 
 static const struct nf_nat_protocol nf_nat_protocol_dccp = {
 	.protonum		= IPPROTO_DCCP,
-	.me			= THIS_MODULE,
 	.manip_pkt		= dccp_manip_pkt,
 	.in_range		= nf_nat_proto_in_range,
 	.unique_tuple		= dccp_unique_tuple,
 #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
-	.range_to_nlattr	= nf_nat_proto_range_to_nlattr,
 	.nlattr_to_range	= nf_nat_proto_nlattr_to_range,
 #endif
 };

net/ipv4/netfilter/nf_nat_proto_gre.c

···
 /* generate unique tuple ... */
 static void
 gre_unique_tuple(struct nf_conntrack_tuple *tuple,
-		 const struct nf_nat_range *range,
+		 const struct nf_nat_ipv4_range *range,
 		 enum nf_nat_manip_type maniptype,
 		 const struct nf_conn *ct)
 {
···
 	if (!ct->master)
 		return;
 
-	if (maniptype == IP_NAT_MANIP_SRC)
+	if (maniptype == NF_NAT_MANIP_SRC)
 		keyptr = &tuple->src.u.gre.key;
 	else
 		keyptr = &tuple->dst.u.gre.key;
 
-	if (!(range->flags & IP_NAT_RANGE_PROTO_SPECIFIED)) {
+	if (!(range->flags & NF_NAT_RANGE_PROTO_SPECIFIED)) {
 		pr_debug("%p: NATing GRE PPTP\n", ct);
 		min = 1;
 		range_size = 0xffff;
···
 
 	/* we only have destination manip of a packet, since 'source key'
 	 * is not present in the packet itself */
-	if (maniptype != IP_NAT_MANIP_DST)
+	if (maniptype != NF_NAT_MANIP_DST)
 		return true;
 	switch (greh->version) {
 	case GRE_VERSION_1701:
···
 
 static const struct nf_nat_protocol gre = {
 	.protonum		= IPPROTO_GRE,
-	.me			= THIS_MODULE,
 	.manip_pkt		= gre_manip_pkt,
 	.in_range		= nf_nat_proto_in_range,
 	.unique_tuple		= gre_unique_tuple,
 #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
-	.range_to_nlattr	= nf_nat_proto_range_to_nlattr,
 	.nlattr_to_range	= nf_nat_proto_nlattr_to_range,
 #endif
 };

net/ipv4/netfilter/nf_nat_proto_icmp.c

···
 
 static void
 icmp_unique_tuple(struct nf_conntrack_tuple *tuple,
-		  const struct nf_nat_range *range,
+		  const struct nf_nat_ipv4_range *range,
 		  enum nf_nat_manip_type maniptype,
 		  const struct nf_conn *ct)
 {
···
 
 	range_size = ntohs(range->max.icmp.id) - ntohs(range->min.icmp.id) + 1;
 	/* If no range specified... */
-	if (!(range->flags & IP_NAT_RANGE_PROTO_SPECIFIED))
+	if (!(range->flags & NF_NAT_RANGE_PROTO_SPECIFIED))
 		range_size = 0xFFFF;
 
 	for (i = 0; ; ++id) {
···
 
 const struct nf_nat_protocol nf_nat_protocol_icmp = {
 	.protonum		= IPPROTO_ICMP,
-	.me			= THIS_MODULE,
 	.manip_pkt		= icmp_manip_pkt,
 	.in_range		= icmp_in_range,
 	.unique_tuple		= icmp_unique_tuple,
 #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
-	.range_to_nlattr	= nf_nat_proto_range_to_nlattr,
 	.nlattr_to_range	= nf_nat_proto_nlattr_to_range,
 #endif
 };

net/ipv4/netfilter/nf_nat_proto_sctp.c

···
 
 static void
 sctp_unique_tuple(struct nf_conntrack_tuple *tuple,
-		  const struct nf_nat_range *range,
+		  const struct nf_nat_ipv4_range *range,
 		  enum nf_nat_manip_type maniptype,
 		  const struct nf_conn *ct)
 {
···
 	iph = (struct iphdr *)(skb->data + iphdroff);
 	hdr = (struct sctphdr *)(skb->data + hdroff);
 
-	if (maniptype == IP_NAT_MANIP_SRC) {
+	if (maniptype == NF_NAT_MANIP_SRC) {
 		/* Get rid of src ip and src pt */
 		oldip = iph->saddr;
 		newip = tuple->src.u3.ip;
···
 
 static const struct nf_nat_protocol nf_nat_protocol_sctp = {
 	.protonum		= IPPROTO_SCTP,
-	.me			= THIS_MODULE,
 	.manip_pkt		= sctp_manip_pkt,
 	.in_range		= nf_nat_proto_in_range,
 	.unique_tuple		= sctp_unique_tuple,
 #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
-	.range_to_nlattr	= nf_nat_proto_range_to_nlattr,
 	.nlattr_to_range	= nf_nat_proto_nlattr_to_range,
 #endif
 };

net/ipv4/netfilter/nf_nat_proto_tcp.c

···
 
 static void
 tcp_unique_tuple(struct nf_conntrack_tuple *tuple,
-		 const struct nf_nat_range *range,
+		 const struct nf_nat_ipv4_range *range,
 		 enum nf_nat_manip_type maniptype,
 		 const struct nf_conn *ct)
 {
···
 	iph = (struct iphdr *)(skb->data + iphdroff);
 	hdr = (struct tcphdr *)(skb->data + hdroff);
 
-	if (maniptype == IP_NAT_MANIP_SRC) {
+	if (maniptype == NF_NAT_MANIP_SRC) {
 		/* Get rid of src ip and src pt */
 		oldip = iph->saddr;
 		newip = tuple->src.u3.ip;
···
 
 const struct nf_nat_protocol nf_nat_protocol_tcp = {
 	.protonum		= IPPROTO_TCP,
-	.me			= THIS_MODULE,
 	.manip_pkt		= tcp_manip_pkt,
 	.in_range		= nf_nat_proto_in_range,
 	.unique_tuple		= tcp_unique_tuple,
 #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
-	.range_to_nlattr	= nf_nat_proto_range_to_nlattr,
 	.nlattr_to_range	= nf_nat_proto_nlattr_to_range,
 #endif
 };

net/ipv4/netfilter/nf_nat_proto_udp.c

···
 
 static void
 udp_unique_tuple(struct nf_conntrack_tuple *tuple,
-		 const struct nf_nat_range *range,
+		 const struct nf_nat_ipv4_range *range,
 		 enum nf_nat_manip_type maniptype,
 		 const struct nf_conn *ct)
 {
···
 	iph = (struct iphdr *)(skb->data + iphdroff);
 	hdr = (struct udphdr *)(skb->data + hdroff);
 
-	if (maniptype == IP_NAT_MANIP_SRC) {
+	if (maniptype == NF_NAT_MANIP_SRC) {
 		/* Get rid of src ip and src pt */
 		oldip = iph->saddr;
 		newip = tuple->src.u3.ip;
···
 
 const struct nf_nat_protocol nf_nat_protocol_udp = {
 	.protonum		= IPPROTO_UDP,
-	.me			= THIS_MODULE,
 	.manip_pkt		= udp_manip_pkt,
 	.in_range		= nf_nat_proto_in_range,
 	.unique_tuple		= udp_unique_tuple,
 #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
-	.range_to_nlattr	= nf_nat_proto_range_to_nlattr,
 	.nlattr_to_range	= nf_nat_proto_nlattr_to_range,
 #endif
 };

net/ipv4/netfilter/nf_nat_proto_udplite.c

···
 
 static void
 udplite_unique_tuple(struct nf_conntrack_tuple *tuple,
-		     const struct nf_nat_range *range,
+		     const struct nf_nat_ipv4_range *range,
 		     enum nf_nat_manip_type maniptype,
 		     const struct nf_conn *ct)
 {
···
 	iph = (struct iphdr *)(skb->data + iphdroff);
 	hdr = (struct udphdr *)(skb->data + hdroff);
 
-	if (maniptype == IP_NAT_MANIP_SRC) {
+	if (maniptype == NF_NAT_MANIP_SRC) {
 		/* Get rid of src ip and src pt */
 		oldip = iph->saddr;
 		newip = tuple->src.u3.ip;
···
 
 static const struct nf_nat_protocol nf_nat_protocol_udplite = {
 	.protonum		= IPPROTO_UDPLITE,
-	.me			= THIS_MODULE,
 	.manip_pkt		= udplite_manip_pkt,
 	.in_range		= nf_nat_proto_in_range,
 	.unique_tuple		= udplite_unique_tuple,
 #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
-	.range_to_nlattr	= nf_nat_proto_range_to_nlattr,
 	.nlattr_to_range	= nf_nat_proto_nlattr_to_range,
 #endif
 };

net/ipv4/netfilter/nf_nat_proto_unknown.c

···
 }
 
 static void unknown_unique_tuple(struct nf_conntrack_tuple *tuple,
-				 const struct nf_nat_range *range,
+				 const struct nf_nat_ipv4_range *range,
 				 enum nf_nat_manip_type maniptype,
 				 const struct nf_conn *ct)
 {
···
 }
 
 const struct nf_nat_protocol nf_nat_unknown_protocol = {
-	/* .me isn't set: getting a ref to this cannot fail. */
 	.manip_pkt		= unknown_manip_pkt,
 	.in_range		= unknown_in_range,
 	.unique_tuple		= unknown_unique_tuple,

net/ipv4/netfilter/nf_nat_rule.c

···
 {
 	struct nf_conn *ct;
 	enum ip_conntrack_info ctinfo;
-	const struct nf_nat_multi_range_compat *mr = par->targinfo;
+	const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
 
 	NF_CT_ASSERT(par->hooknum == NF_INET_POST_ROUTING ||
 		     par->hooknum == NF_INET_LOCAL_IN);
···
 			    ctinfo == IP_CT_RELATED_REPLY));
 	NF_CT_ASSERT(par->out != NULL);
 
-	return nf_nat_setup_info(ct, &mr->range[0], IP_NAT_MANIP_SRC);
+	return nf_nat_setup_info(ct, &mr->range[0], NF_NAT_MANIP_SRC);
 }
 
 static unsigned int
···
 {
 	struct nf_conn *ct;
 	enum ip_conntrack_info ctinfo;
-	const struct nf_nat_multi_range_compat *mr = par->targinfo;
+	const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
 
 	NF_CT_ASSERT(par->hooknum == NF_INET_PRE_ROUTING ||
 		     par->hooknum == NF_INET_LOCAL_OUT);
···
 	/* Connection must be valid and new. */
 	NF_CT_ASSERT(ct && (ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED));
 
-	return nf_nat_setup_info(ct, &mr->range[0], IP_NAT_MANIP_DST);
+	return nf_nat_setup_info(ct, &mr->range[0], NF_NAT_MANIP_DST);
 }
 
 static int ipt_snat_checkentry(const struct xt_tgchk_param *par)
 {
-	const struct nf_nat_multi_range_compat *mr = par->targinfo;
+	const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
 
 	/* Must be a valid range */
 	if (mr->rangesize != 1) {
···
 
 static int ipt_dnat_checkentry(const struct xt_tgchk_param *par)
 {
-	const struct nf_nat_multi_range_compat *mr = par->targinfo;
+	const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
 
 	/* Must be a valid range */
 	if (mr->rangesize != 1) {
···
 alloc_null_binding(struct nf_conn *ct, unsigned int hooknum)
 {
 	/* Force range to this IP; let proto decide mapping for
-	   per-proto parts (hence not IP_NAT_RANGE_PROTO_SPECIFIED).
+	   per-proto parts (hence not NF_NAT_RANGE_PROTO_SPECIFIED).
 	*/
-	struct nf_nat_range range;
+	struct nf_nat_ipv4_range range;
 
 	range.flags = 0;
 	pr_debug("Allocating NULL binding for %p (%pI4)\n", ct,
-		 HOOK2MANIP(hooknum) == IP_NAT_MANIP_SRC ?
+		 HOOK2MANIP(hooknum) == NF_NAT_MANIP_SRC ?
 		 &ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u3.ip :
 		 &ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.u3.ip);
 
···
 static struct xt_target ipt_snat_reg __read_mostly = {
 	.name		= "SNAT",
 	.target		= ipt_snat_target,
-	.targetsize	= sizeof(struct nf_nat_multi_range_compat),
+	.targetsize	= sizeof(struct nf_nat_ipv4_multi_range_compat),
 	.table		= "nat",
 	.hooks		= (1 << NF_INET_POST_ROUTING) | (1 << NF_INET_LOCAL_IN),
 	.checkentry	= ipt_snat_checkentry,
···
 static struct xt_target ipt_dnat_reg __read_mostly = {
 	.name		= "DNAT",
 	.target		= ipt_dnat_target,
-	.targetsize	= sizeof(struct nf_nat_multi_range_compat),
+	.targetsize	= sizeof(struct nf_nat_ipv4_multi_range_compat),
 	.table		= "nat",
 	.hooks		= (1 << NF_INET_PRE_ROUTING) | (1 << NF_INET_LOCAL_OUT),
 	.checkentry	= ipt_dnat_checkentry,

net/ipv4/netfilter/nf_nat_sip.c

···
 static void ip_nat_sip_expected(struct nf_conn *ct,
 				struct nf_conntrack_expect *exp)
 {
-	struct nf_nat_range range;
+	struct nf_nat_ipv4_range range;
 
 	/* This must be a fresh one. */
 	BUG_ON(ct->status & IPS_NAT_DONE_MASK);
 
 	/* For DST manip, map port here to where it's expected. */
-	range.flags = (IP_NAT_RANGE_MAP_IPS | IP_NAT_RANGE_PROTO_SPECIFIED);
+	range.flags = (NF_NAT_RANGE_MAP_IPS | NF_NAT_RANGE_PROTO_SPECIFIED);
 	range.min = range.max = exp->saved_proto;
 	range.min_ip = range.max_ip = exp->saved_ip;
-	nf_nat_setup_info(ct, &range, IP_NAT_MANIP_DST);
+	nf_nat_setup_info(ct, &range, NF_NAT_MANIP_DST);
 
 	/* Change src to where master sends to, but only if the connection
 	 * actually came from the same source. */
 	if (ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3.ip ==
 	    ct->master->tuplehash[exp->dir].tuple.src.u3.ip) {
-		range.flags = IP_NAT_RANGE_MAP_IPS;
+		range.flags = NF_NAT_RANGE_MAP_IPS;
 		range.min_ip = range.max_ip
 			= ct->master->tuplehash[!exp->dir].tuple.dst.u3.ip;
-		nf_nat_setup_info(ct, &range, IP_NAT_MANIP_SRC);
+		nf_nat_setup_info(ct, &range, NF_NAT_MANIP_SRC);
 	}
 }
 

net/ipv4/netfilter/nf_nat_standalone.c

···
 				return ret;
 		} else
 			pr_debug("Already setup manip %s for ct %p\n",
-				 maniptype == IP_NAT_MANIP_SRC ? "SRC" : "DST",
+				 maniptype == NF_NAT_MANIP_SRC ? "SRC" : "DST",
 				 ct);
 		break;
 

net/ipv6/netfilter/Kconfig

···
 
 	  To compile it as a module, choose M here.  If unsure, say N.
 
+config IP6_NF_MATCH_RPFILTER
+	tristate '"rpfilter" reverse path filter match support'
+	depends on NETFILTER_ADVANCED
+	---help---
+	  This option allows you to match packets whose replies would
+	  go out via the interface the packet came in.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+	  The module will be called ip6t_rpfilter.
+
 config IP6_NF_MATCH_RT
 	tristate '"rt" Routing header match support'
 	depends on NETFILTER_ADVANCED

net/ipv6/netfilter/Makefile

···
 obj-$(CONFIG_IP6_NF_MATCH_IPV6HEADER) += ip6t_ipv6header.o
 obj-$(CONFIG_IP6_NF_MATCH_MH) += ip6t_mh.o
 obj-$(CONFIG_IP6_NF_MATCH_OPTS) += ip6t_hbh.o
+obj-$(CONFIG_IP6_NF_MATCH_RPFILTER) += ip6t_rpfilter.o
 obj-$(CONFIG_IP6_NF_MATCH_RT) += ip6t_rt.o
 
 # targets

net/ipv6/netfilter/ip6t_rpfilter.c

···
+/*
+ * Copyright (c) 2011 Florian Westphal <[e-mail]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/route.h>
+#include <net/ip6_fib.h>
+#include <net/ip6_route.h>
+
+#include <linux/netfilter/xt_rpfilter.h>
+#include <linux/netfilter/x_tables.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Florian Westphal <[e-mail]>");
+MODULE_DESCRIPTION("Xtables: IPv6 reverse path filter match");
+
+static bool rpfilter_addr_unicast(const struct in6_addr *addr)
+{
+	int addr_type = ipv6_addr_type(addr);
+	return addr_type & IPV6_ADDR_UNICAST;
+}
+
+static bool rpfilter_lookup_reverse6(const struct sk_buff *skb,
+				     const struct net_device *dev, u8 flags)
+{
+	struct rt6_info *rt;
+	struct ipv6hdr *iph = ipv6_hdr(skb);
+	bool ret = false;
+	struct flowi6 fl6 = {
+		.flowlabel = (* (__be32 *) iph) & IPV6_FLOWINFO_MASK,
+		.flowi6_proto = iph->nexthdr,
+		.daddr = iph->saddr,
+	};
+	int lookup_flags;
+
+	if (rpfilter_addr_unicast(&iph->daddr)) {
+		memcpy(&fl6.saddr, &iph->daddr, sizeof(struct in6_addr));
+		lookup_flags = RT6_LOOKUP_F_HAS_SADDR;
+	} else {
+		lookup_flags = 0;
+	}
+
+	fl6.flowi6_mark = flags & XT_RPFILTER_VALID_MARK ? skb->mark : 0;
+	if ((flags & XT_RPFILTER_LOOSE) == 0) {
+		fl6.flowi6_oif = dev->ifindex;
+		lookup_flags |= RT6_LOOKUP_F_IFACE;
+	}
+
+	rt = (void *) ip6_route_lookup(dev_net(dev), &fl6, lookup_flags);
+	if (rt->dst.error)
+		goto out;
+
+	if (rt->rt6i_flags & (RTF_REJECT|RTF_ANYCAST))
+		goto out;
+
+	if (rt->rt6i_flags & RTF_LOCAL) {
+		ret = flags & XT_RPFILTER_ACCEPT_LOCAL;
+		goto out;
+	}
+
+	if (rt->rt6i_idev->dev == dev || (flags & XT_RPFILTER_LOOSE))
+		ret = true;
+ out:
+	dst_release(&rt->dst);
+	return ret;
+}
+
+static bool rpfilter_mt(const struct sk_buff *skb, struct xt_action_param *par)
+{
+	const struct xt_rpfilter_info *info = par->matchinfo;
+	int saddrtype;
+	struct ipv6hdr *iph;
+	bool invert = info->flags & XT_RPFILTER_INVERT;
+
+	if (par->in->flags & IFF_LOOPBACK)
+		return true ^ invert;
+
+	iph = ipv6_hdr(skb);
+	saddrtype = ipv6_addr_type(&iph->saddr);
+	if (unlikely(saddrtype == IPV6_ADDR_ANY))
+		return true ^ invert; /* not routable: forward path will drop it */
+
+	return rpfilter_lookup_reverse6(skb, par->in, info->flags) ^ invert;
+}
+
+static int rpfilter_check(const struct xt_mtchk_param *par)
+{
+	const struct xt_rpfilter_info *info = par->matchinfo;
+	unsigned int options = ~XT_RPFILTER_OPTION_MASK;
+
+	if (info->flags & options) {
+		pr_info("unknown options encountered");
+		return -EINVAL;
+	}
+
+	if (strcmp(par->table, "mangle") != 0 &&
+	    strcmp(par->table, "raw") != 0) {
+		pr_info("match only valid in the \'raw\' "
+			"or \'mangle\' tables, not \'%s\'.\n", par->table);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static struct xt_match rpfilter_mt_reg __read_mostly = {
+	.name		= "rpfilter",
+	.family		= NFPROTO_IPV6,
+	.checkentry	= rpfilter_check,
+	.match		= rpfilter_mt,
+	.matchsize	= sizeof(struct xt_rpfilter_info),
+	.hooks		= (1 << NF_INET_PRE_ROUTING),
+	.me		= THIS_MODULE
+};
+
+static int __init rpfilter_mt_init(void)
+{
+	return xt_register_match(&rpfilter_mt_reg);
+}
+
+static void __exit rpfilter_mt_exit(void)
+{
+	xt_unregister_match(&rpfilter_mt_reg);
+}
+
+module_init(rpfilter_mt_init);
+module_exit(rpfilter_mt_exit);

net/ipv6/route.c

···
 
 }
 
+struct dst_entry * ip6_route_lookup(struct net *net, struct flowi6 *fl6,
+				    int flags)
+{
+	return fib6_rule_lookup(net, fl6, flags, ip6_pol_route_lookup);
+}
+EXPORT_SYMBOL_GPL(ip6_route_lookup);
+
 struct rt6_info *rt6_lookup(struct net *net, const struct in6_addr *daddr,
 			    const struct in6_addr *saddr, int oif, int strict)
 {

net/netfilter/Kconfig

···
 config NETFILTER_NETLINK
 	tristate
 
+config NETFILTER_NETLINK_ACCT
+tristate "Netfilter NFACCT over NFNETLINK interface"
+	depends on NETFILTER_ADVANCED
+	select NETFILTER_NETLINK
+	help
+	  If this option is enabled, the kernel will include support
+	  for extended accounting via NFNETLINK.
+
 config NETFILTER_NETLINK_QUEUE
 	tristate "Netfilter NFQUEUE over NFNETLINK interface"
 	depends on NETFILTER_ADVANCED
···
 	  Multiport matching allows you to match TCP or UDP packets based on
 	  a series of source or destination ports: normally a rule can only
 	  match a single range of ports.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config NETFILTER_XT_MATCH_NFACCT
+	tristate '"nfacct" match support'
+	default m if NETFILTER_ADVANCED=n
+	select NETFILTER_NETLINK_ACCT
+	help
+	  This option allows you to use the extended accounting through
+	  nfnetlink_acct.
 
 	  To compile it as a module, choose M here.  If unsure, say N.
 

net/netfilter/Makefile

···
 obj-$(CONFIG_NETFILTER) = netfilter.o
 
 obj-$(CONFIG_NETFILTER_NETLINK) += nfnetlink.o
+obj-$(CONFIG_NETFILTER_NETLINK_ACCT) += nfnetlink_acct.o
 obj-$(CONFIG_NETFILTER_NETLINK_QUEUE) += nfnetlink_queue.o
 obj-$(CONFIG_NETFILTER_NETLINK_LOG) += nfnetlink_log.o
 
···
 obj-$(CONFIG_NETFILTER_XT_MATCH_LIMIT) += xt_limit.o
 obj-$(CONFIG_NETFILTER_XT_MATCH_MAC) += xt_mac.o
 obj-$(CONFIG_NETFILTER_XT_MATCH_MULTIPORT) += xt_multiport.o
+obj-$(CONFIG_NETFILTER_XT_MATCH_NFACCT) += xt_nfacct.o
 obj-$(CONFIG_NETFILTER_XT_MATCH_OSF) += xt_osf.o
 obj-$(CONFIG_NETFILTER_XT_MATCH_OWNER) += xt_owner.o
 obj-$(CONFIG_NETFILTER_XT_MATCH_PHYSDEV) += xt_physdev.o

net/netfilter/ipvs/Kconfig

···
 	  If you want to compile it in kernel, say Y. To compile it as a
 	  module, choose M here. If unsure, say N.
 
+comment 'IPVS SH scheduler'
+
+config IP_VS_SH_TAB_BITS
+	int "IPVS source hashing table size (the Nth power of 2)"
+	range 4 20
+	default 8
+	---help---
+	  The source hashing scheduler maps source IPs to destinations
+	  stored in a hash table. This table is tiled by each destination
+	  until all slots in the table are filled. When using weights to
+	  allow destinations to receive more connections, the table is
+	  tiled an amount proportional to the weights specified. The table
+	  needs to be large enough to effectively fit all the destinations
+	  multiplied by their respective weights.
+
 comment 'IPVS application helper'
 
 config	IP_VS_FTP

net/netfilter/ipvs/ip_vs_sh.c

···
  * server is dead or overloaded, the load balancer can bypass the cache
  * server and send requests to the original server directly.
  *
+ * The weight destination attribute can be used to control the
+ * distribution of connections to the destinations in servernode. The
+ * greater the weight, the more connections the destination
+ * will receive.
+ *
  */
 
 #define KMSG_COMPONENT "IPVS"
···
 	struct ip_vs_sh_bucket *b;
 	struct list_head *p;
 	struct ip_vs_dest *dest;
+	int d_count;
 
 	b = tbl;
 	p = &svc->destinations;
+	d_count = 0;
 	for (i=0; i<IP_VS_SH_TAB_SIZE; i++) {
 		if (list_empty(p)) {
 			b->dest = NULL;
···
 			atomic_inc(&dest->refcnt);
 			b->dest = dest;
 
-			p = p->next;
+			IP_VS_DBG_BUF(6, "assigned i: %d dest: %s weight: %d\n",
+				      i, IP_VS_DBG_ADDR(svc->af, &dest->addr),
+				      atomic_read(&dest->weight));
+
+			/* Don't move to next dest until filling weight */
+			if (++d_count >= atomic_read(&dest->weight)) {
+				p = p->next;
+				d_count = 0;
+			}
+
 		}
 		b++;
 	}

net/netfilter/nf_conntrack_acct.c

···
 		return 0;
 
 	return seq_printf(s, "packets=%llu bytes=%llu ",
-			  (unsigned long long)acct[dir].packets,
-			  (unsigned long long)acct[dir].bytes);
+			  (unsigned long long)atomic64_read(&acct[dir].packets),
+			  (unsigned long long)atomic64_read(&acct[dir].bytes));
 };
 EXPORT_SYMBOL_GPL(seq_print_acct);
 

net/netfilter/nf_conntrack_core.c

···
 EXPORT_PER_CPU_SYMBOL(nf_conntrack_untracked);
 
 unsigned int nf_conntrack_hash_rnd __read_mostly;
+EXPORT_SYMBOL_GPL(nf_conntrack_hash_rnd);
 
 static u32 hash_conntrack_raw(const struct nf_conntrack_tuple *tuple, u16 zone)
 {
···
 
 		acct = nf_conn_acct_find(ct);
 		if (acct) {
-			spin_lock_bh(&ct->lock);
-			acct[CTINFO2DIR(ctinfo)].packets++;
-			acct[CTINFO2DIR(ctinfo)].bytes += skb->len;
-			spin_unlock_bh(&ct->lock);
+			atomic64_inc(&acct[CTINFO2DIR(ctinfo)].packets);
+			atomic64_add(skb->len, &acct[CTINFO2DIR(ctinfo)].bytes);
 		}
 	}
 }
···
 
 		acct = nf_conn_acct_find(ct);
 		if (acct) {
-			spin_lock_bh(&ct->lock);
-			acct[CTINFO2DIR(ctinfo)].packets++;
-			acct[CTINFO2DIR(ctinfo)].bytes +=
-				skb->len - skb_network_offset(skb);
-			spin_unlock_bh(&ct->lock);
+			atomic64_inc(&acct[CTINFO2DIR(ctinfo)].packets);
+			atomic64_add(skb->len - skb_network_offset(skb),
+				     &acct[CTINFO2DIR(ctinfo)].bytes);
 		}
 	}
 

net/netfilter/nf_conntrack_expect.c

···
 
 static struct kmem_cache *nf_ct_expect_cachep __read_mostly;
 
-static HLIST_HEAD(nf_ct_userspace_expect_list);
-
 /* nf_conntrack_expect helper functions */
 void nf_ct_unlink_expect_report(struct nf_conntrack_expect *exp,
 				u32 pid, int report)
···
 	struct nf_conn_help *master_help = nfct_help(exp->master);
 	struct net *net = nf_ct_exp_net(exp);
 
+	NF_CT_ASSERT(master_help);
 	NF_CT_ASSERT(!timer_pending(&exp->timeout));
 
 	hlist_del_rcu(&exp->hnode);
 	net->ct.expect_count--;
 
 	hlist_del(&exp->lnode);
-	if (!(exp->flags & NF_CT_EXPECT_USERSPACE))
-		master_help->expecting[exp->class]--;
+	master_help->expecting[exp->class]--;
 
 	nf_ct_expect_event_report(IPEXP_DESTROY, exp, pid, report);
 	nf_ct_expect_put(exp);
···
 }
 EXPORT_SYMBOL_GPL(nf_ct_expect_put);
 
-static void nf_ct_expect_insert(struct nf_conntrack_expect *exp)
+static int nf_ct_expect_insert(struct nf_conntrack_expect *exp)
 {
 	struct nf_conn_help *master_help = nfct_help(exp->master);
+	struct nf_conntrack_helper *helper;
 	struct net *net = nf_ct_exp_net(exp);
-	const struct nf_conntrack_expect_policy *p;
 	unsigned int h = nf_ct_expect_dst_hash(&exp->tuple);
 
 	/* two references : one for hash insert, one for the timer */
 	atomic_add(2, &exp->use);
 
-	if (master_help) {
-		hlist_add_head(&exp->lnode, &master_help->expectations);
-		master_help->expecting[exp->class]++;
-	} else if (exp->flags & NF_CT_EXPECT_USERSPACE)
-		hlist_add_head(&exp->lnode, &nf_ct_userspace_expect_list);
+	hlist_add_head(&exp->lnode, &master_help->expectations);
+	master_help->expecting[exp->class]++;
 
 	hlist_add_head_rcu(&exp->hnode, &net->ct.expect_hash[h]);
 	net->ct.expect_count++;
 
 	setup_timer(&exp->timeout, nf_ct_expectation_timed_out,
 		    (unsigned long)exp);
-	if (master_help) {
-		p = &rcu_dereference_protected(
-				master_help->helper,
-				lockdep_is_held(&nf_conntrack_lock)
-				)->expect_policy[exp->class];
-		exp->timeout.expires = jiffies + p->timeout * HZ;
+	helper = rcu_dereference_protected(master_help->helper,
+					   lockdep_is_held(&nf_conntrack_lock));
+	if (helper) {
+		exp->timeout.expires = jiffies +
+			helper->expect_policy[exp->class].timeout * HZ;
 	}
 	add_timer(&exp->timeout);
 
 	NF_CT_STAT_INC(net, expect_create);
+	return 0;
 }
 
 /* Race with expectations being used means we could have none to find; OK. */
···
 	struct nf_conntrack_expect *i;
 	struct nf_conn *master = expect->master;
 	struct nf_conn_help *master_help = nfct_help(master);
+	struct nf_conntrack_helper *helper;
 	struct net *net = nf_ct_exp_net(expect);
 	struct hlist_node *n;
 	unsigned int h;
 	int ret = 1;
 
-	/* Don't allow expectations created from kernel-space with no helper */
-	if (!(expect->flags & NF_CT_EXPECT_USERSPACE) &&
-	    (!master_help || (master_help && !master_help->helper))) {
+	if (!master_help) {
 		ret = -ESHUTDOWN;
 		goto out;
 	}
···
 		}
 	}
 	/* Will be over limit? */
-	if (master_help) {
-		p = &rcu_dereference_protected(
-			master_help->helper,
-			lockdep_is_held(&nf_conntrack_lock)
-			)->expect_policy[expect->class];
+	helper = rcu_dereference_protected(master_help->helper,
+					   lockdep_is_held(&nf_conntrack_lock));
+	if (helper) {
+		p = &helper->expect_policy[expect->class];
 		if (p->max_expected &&
 		    master_help->expecting[expect->class] >= p->max_expected) {
 			evict_oldest_expect(master, expect);
···
 	if (ret <= 0)
 		goto out;
 
-	ret = 0;
-	nf_ct_expect_insert(expect);
+	ret = nf_ct_expect_insert(expect);
+	if (ret < 0)
+		goto out;
 	spin_unlock_bh(&nf_conntrack_lock);
 	nf_ct_expect_event_report(IPEXP_NEW, expect, pid, report);
 	return ret;
···
 	return ret;
 }
 EXPORT_SYMBOL_GPL(nf_ct_expect_related_report);
-
-void nf_ct_remove_userspace_expectations(void)
-{
-	struct nf_conntrack_expect *exp;
-	struct hlist_node *n, *next;
-
-	hlist_for_each_entry_safe(exp, n, next,
-				  &nf_ct_userspace_expect_list, lnode) {
-		if (del_timer(&exp->timeout)) {
-			nf_ct_unlink_expect(exp);
-			nf_ct_expect_put(exp);
-		}
-	}
-}
-EXPORT_SYMBOL_GPL(nf_ct_remove_userspace_expectations);
 
 #ifdef CONFIG_PROC_FS
 struct ct_expect_iter_state {

net/netfilter/nf_conntrack_helper.c

···
 	int ret = 0;
 
 	if (tmpl != NULL) {
+		/* we've got a userspace helper. */
+		if (tmpl->status & IPS_USERSPACE_HELPER) {
+			help = nf_ct_helper_ext_add(ct, flags);
+			if (help == NULL) {
+				ret = -ENOMEM;
+				goto out;
+			}
+			rcu_assign_pointer(help->helper, NULL);
+			__set_bit(IPS_USERSPACE_HELPER_BIT, &ct->status);
+			ret = 0;
+			goto out;
+		}
 		help = nfct_help(tmpl);
 		if (help != NULL)
 			helper = help->helper;

net/netfilter/nf_conntrack_netlink.c

···
 }
 
 static int
-ctnetlink_dump_counters(struct sk_buff *skb, const struct nf_conn *ct,
-			enum ip_conntrack_dir dir)
+dump_counters(struct sk_buff *skb, u64 pkts, u64 bytes,
+	      enum ip_conntrack_dir dir)
 {
 	enum ctattr_type type = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG;
 	struct nlattr *nest_count;
-	const struct nf_conn_counter *acct;
-
-	acct = nf_conn_acct_find(ct);
-	if (!acct)
-		return 0;
 
 	nest_count = nla_nest_start(skb, type | NLA_F_NESTED);
 	if (!nest_count)
 		goto nla_put_failure;
 
-	NLA_PUT_BE64(skb, CTA_COUNTERS_PACKETS,
-		     cpu_to_be64(acct[dir].packets));
-	NLA_PUT_BE64(skb, CTA_COUNTERS_BYTES,
-		     cpu_to_be64(acct[dir].bytes));
+	NLA_PUT_BE64(skb, CTA_COUNTERS_PACKETS, cpu_to_be64(pkts));
+	NLA_PUT_BE64(skb, CTA_COUNTERS_BYTES, cpu_to_be64(bytes));
 
 	nla_nest_end(skb, nest_count);
 
···
 
 nla_put_failure:
 	return -1;
+}
+
+static int
+ctnetlink_dump_counters(struct sk_buff *skb, const struct nf_conn *ct,
+			enum ip_conntrack_dir dir, int type)
+{
+	struct nf_conn_counter *acct;
+	u64 pkts, bytes;
+
+	acct = nf_conn_acct_find(ct);
+	if (!acct)
+		return 0;
+
+	if (type == IPCTNL_MSG_CT_GET_CTRZERO) {
+		pkts = atomic64_xchg(&acct[dir].packets, 0);
+		bytes = atomic64_xchg(&acct[dir].bytes, 0);
+	} else {
+		pkts = atomic64_read(&acct[dir].packets);
+		bytes = atomic64_read(&acct[dir].bytes);
+	}
+	return dump_counters(skb, pkts, bytes, dir);
 }
 
 static int
···
 }
 
 static int
-ctnetlink_fill_info(struct sk_buff *skb, u32 pid, u32 seq,
-		    int event, struct nf_conn *ct)
+ctnetlink_fill_info(struct sk_buff *skb, u32 pid, u32 seq, u32 type,
+		    struct nf_conn *ct)
 {
 	struct nlmsghdr *nlh;
 	struct nfgenmsg *nfmsg;
 	struct nlattr *nest_parms;
-	unsigned int flags = pid ? NLM_F_MULTI : 0;
+	unsigned int flags = pid ? NLM_F_MULTI : 0, event;
 
-	event |= NFNL_SUBSYS_CTNETLINK << 8;
+	event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_NEW);
 	nlh = nlmsg_put(skb, pid, seq, event, sizeof(*nfmsg), flags);
 	if (nlh == NULL)
 		goto nlmsg_failure;
···
 
 	if (ctnetlink_dump_status(skb, ct) < 0 ||
 	    ctnetlink_dump_timeout(skb, ct) < 0 ||
-	    ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 ||
-	    ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0 ||
+	    ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL, type) < 0 ||
+	    ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY, type) < 0 ||
 	    ctnetlink_dump_timestamp(skb, ct) < 0 ||
 	    ctnetlink_dump_protoinfo(skb, ct) < 0 ||
 	    ctnetlink_dump_helpinfo(skb, ct) < 0 ||
···
 		goto nla_put_failure;
 
 	if (events & (1 << IPCT_DESTROY)) {
-		if (ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 ||
-		    ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0 ||
+		if (ctnetlink_dump_counters(skb, ct,
+					    IP_CT_DIR_ORIGINAL, type) < 0 ||
+		    ctnetlink_dump_counters(skb, ct,
+					    IP_CT_DIR_REPLY, type) < 0 ||
 		    ctnetlink_dump_timestamp(skb, ct) < 0)
 			goto nla_put_failure;
 	} else {
···
 			}
 			if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid,
 						cb->nlh->nlmsg_seq,
-						IPCTNL_MSG_CT_NEW, ct) < 0) {
+						NFNL_MSG_TYPE(
+							cb->nlh->nlmsg_type),
+						ct) < 0) {
 				nf_conntrack_get(&ct->ct_general);
 				cb->args[1] = (unsigned long)ct;
 				goto out;
-			}
-
-			if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) ==
-						IPCTNL_MSG_CT_GET_CTRZERO) {
-				struct nf_conn_counter *acct;
-
-				acct = nf_conn_acct_find(ct);
-				if (acct)
-					memset(acct, 0, sizeof(struct nf_conn_counter[IP_CT_DIR_MAX]));
 			}
 		}
 		if (cb->args[1]) {
···
 
 	rcu_read_lock();
 	err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq,
-				  IPCTNL_MSG_CT_NEW, ct);
+				  NFNL_MSG_TYPE(nlh->nlmsg_type), ct);
 	rcu_read_unlock();
 	nf_ct_put(ct);
 	if (err <= 0)
···
 
 	if (cda[CTA_NAT_DST]) {
 		ret = ctnetlink_parse_nat_setup(ct,
-						IP_NAT_MANIP_DST,
+						NF_NAT_MANIP_DST,
 						cda[CTA_NAT_DST]);
 		if (ret < 0)
 			return ret;
 	}
 	if (cda[CTA_NAT_SRC]) {
 		ret = ctnetlink_parse_nat_setup(ct,
-						IP_NAT_MANIP_SRC,
+						NF_NAT_MANIP_SRC,
 						cda[CTA_NAT_SRC]);
 		if (ret < 0)
 			return ret;
···
 	if (err < 0)
 		return err;
 
-	if (cda[CTA_EXPECT_MASTER])
+	if (cda[CTA_EXPECT_TUPLE])
+		err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3);
+	else if (cda[CTA_EXPECT_MASTER])
 		err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3);
 	else
 		return -EINVAL;
···
 	}
 	help = nfct_help(ct);
 	if (!help) {
+		err = -EOPNOTSUPP;
+		goto out;
+	}
+	if (test_bit(IPS_USERSPACE_HELPER_BIT, &ct->status)) {
 		if (!cda[CTA_EXPECT_TIMEOUT]) {
 			err = -EINVAL;
 			goto out;
···
 {
 	pr_info("ctnetlink: unregistering from nfnetlink.\n");
 
-	nf_ct_remove_userspace_expectations();
 	unregister_pernet_subsys(&ctnetlink_net_ops);
 	nfnetlink_subsys_unregister(&ctnl_exp_subsys);
 	nfnetlink_subsys_unregister(&ctnl_subsys);

net/netfilter/nfnetlink_acct.c

···
+/*
+ * (C) 2011 Pablo Neira Ayuso <[e-mail]>
+ * (C) 2011 Intra2net AG <http://www.intra2net.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation (or any later at your option).
+ */
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/skbuff.h>
+#include <linux/netlink.h>
+#include <linux/rculist.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <net/netlink.h>
+#include <net/sock.h>
+#include <asm/atomic.h>
+
+#include <linux/netfilter.h>
+#include <linux/netfilter/nfnetlink.h>
+#include <linux/netfilter/nfnetlink_acct.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Pablo Neira Ayuso <[e-mail]>");
+MODULE_DESCRIPTION("nfacct: Extended Netfilter accounting infrastructure");
+
+static LIST_HEAD(nfnl_acct_list);
+
+struct nf_acct {
+	atomic64_t		pkts;
+	atomic64_t		bytes;
+	struct list_head	head;
+	atomic_t		refcnt;
+	char			name[NFACCT_NAME_MAX];
+	struct rcu_head		rcu_head;
+};
+
+static int
+nfnl_acct_new(struct sock *nfnl, struct sk_buff *skb,
+	     const struct nlmsghdr *nlh, const struct nlattr * const tb[])
+{
+	struct nf_acct *nfacct, *matching = NULL;
+	char *acct_name;
+
+	if (!tb[NFACCT_NAME])
+		return -EINVAL;
+
+	acct_name = nla_data(tb[NFACCT_NAME]);
+
+	list_for_each_entry(nfacct, &nfnl_acct_list, head) {
+		if (strncmp(nfacct->name, acct_name, NFACCT_NAME_MAX) != 0)
+			continue;
+
+                if (nlh->nlmsg_flags & NLM_F_EXCL)
+			return -EEXIST;
+
+		matching = nfacct;
+		break;
+        }
+
+	if (matching) {
+		if (nlh->nlmsg_flags & NLM_F_REPLACE) {
+			/* reset counters if you request a replacement. */
+			atomic64_set(&matching->pkts, 0);
+			atomic64_set(&matching->bytes, 0);
+			return 0;
+		}
+		return -EBUSY;
+	}
+
+	nfacct = kzalloc(sizeof(struct nf_acct), GFP_KERNEL);
+	if (nfacct == NULL)
+		return -ENOMEM;
+
+	strncpy(nfacct->name, nla_data(tb[NFACCT_NAME]), NFACCT_NAME_MAX);
+
+	if (tb[NFACCT_BYTES]) {
+		atomic64_set(&nfacct->bytes,
+			     be64_to_cpu(nla_get_u64(tb[NFACCT_BYTES])));
+	}
+	if (tb[NFACCT_PKTS]) {
+		atomic64_set(&nfacct->pkts,
+			     be64_to_cpu(nla_get_u64(tb[NFACCT_PKTS])));
+	}
+	atomic_set(&nfacct->refcnt, 1);
+	list_add_tail_rcu(&nfacct->head, &nfnl_acct_list);
+	return 0;
+}
+
+static int
+nfnl_acct_fill_info(struct sk_buff *skb, u32 pid, u32 seq, u32 type,
+		   int event, struct nf_acct *acct)
+{
+	struct nlmsghdr *nlh;
+	struct nfgenmsg *nfmsg;
+	unsigned int flags = pid ? NLM_F_MULTI : 0;
+	u64 pkts, bytes;
+
+	event |= NFNL_SUBSYS_ACCT << 8;
+	nlh = nlmsg_put(skb, pid, seq, event, sizeof(*nfmsg), flags);
+	if (nlh == NULL)
+		goto nlmsg_failure;
+
+	nfmsg = nlmsg_data(nlh);
+	nfmsg->nfgen_family = AF_UNSPEC;
+	nfmsg->version = NFNETLINK_V0;
+	nfmsg->res_id = 0;
+
+	NLA_PUT_STRING(skb, NFACCT_NAME, acct->name);
+
+	if (type == NFNL_MSG_ACCT_GET_CTRZERO) {
+		pkts = atomic64_xchg(&acct->pkts, 0);
+		bytes = atomic64_xchg(&acct->bytes, 0);
+	} else {
+		pkts = atomic64_read(&acct->pkts);
+		bytes = atomic64_read(&acct->bytes);
+	}
+	NLA_PUT_BE64(skb, NFACCT_PKTS, cpu_to_be64(pkts));
+	NLA_PUT_BE64(skb, NFACCT_BYTES, cpu_to_be64(bytes));
+	NLA_PUT_BE32(skb, NFACCT_USE, htonl(atomic_read(&acct->refcnt)));
+
+	nlmsg_end(skb, nlh);
+	return skb->len;
+
+nlmsg_failure:
+nla_put_failure:
+	nlmsg_cancel(skb, nlh);
+	return -1;
+}
+
+static int
+nfnl_acct_dump(struct sk_buff *skb, struct netlink_callback *cb)
+{
+	struct nf_acct *cur, *last;
+
+	if (cb->args[2])
+		return 0;
+
+	last = (struct nf_acct *)cb->args[1];
+	if (cb->args[1])
+		cb->args[1] = 0;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(cur, &nfnl_acct_list, head) {
+		if (last && cur != last)
+			continue;
+
+		if (nfnl_acct_fill_info(skb, NETLINK_CB(cb->skb).pid,
+				       cb->nlh->nlmsg_seq,
+				       NFNL_MSG_TYPE(cb->nlh->nlmsg_type),
+				       NFNL_MSG_ACCT_NEW, cur) < 0) {
+			cb->args[1] = (unsigned long)cur;
+			break;
+		}
+	}
+	if (!cb->args[1])
+		cb->args[2] = 1;
+	rcu_read_unlock();
+	return skb->len;
+}
+
+static int
+nfnl_acct_get(struct sock *nfnl, struct sk_buff *skb,
+	     const struct nlmsghdr *nlh, const struct nlattr * const tb[])
+{
+	int ret = 0;
+	struct nf_acct *cur;
+	char *acct_name;
+
+	if (nlh->nlmsg_flags & NLM_F_DUMP) {
+		return netlink_dump_start(nfnl, skb, nlh, nfnl_acct_dump,
+					  NULL, 0);
+	}
+
+	if (!tb[NFACCT_NAME])
+		return -EINVAL;
+	acct_name = nla_data(tb[NFACCT_NAME]);
+
+	list_for_each_entry(cur, &nfnl_acct_list, head) {
+		struct sk_buff *skb2;
+
+		if (strncmp(cur->name, acct_name, NFACCT_NAME_MAX)!= 0)
+			continue;
+
+		skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+		if (skb2 == NULL)
+			break;
+
+		ret = nfnl_acct_fill_info(skb2, NETLINK_CB(skb).pid,
+					 nlh->nlmsg_seq,
+					 NFNL_MSG_TYPE(nlh->nlmsg_type),
+					 NFNL_MSG_ACCT_NEW, cur);
+		if (ret <= 0)
+			kfree_skb(skb2);
+
+		break;
+	}
+	return ret;
+}
+
+/* try to delete object, fail if it is still in use. */
+static int nfnl_acct_try_del(struct nf_acct *cur)
+{
+	int ret = 0;
+
+	/* we want to avoid races with nfnl_acct_find_get. */
+	if (atomic_dec_and_test(&cur->refcnt)) {
+		/* We are protected by nfnl mutex. */
+		list_del_rcu(&cur->head);
+		kfree_rcu(cur, rcu_head);
+	} else {
+		/* still in use, restore reference counter. */
+		atomic_inc(&cur->refcnt);
+		ret = -EBUSY;
+	}
+	return ret;
+}
+
+static int
+nfnl_acct_del(struct sock *nfnl, struct sk_buff *skb,
+	     const struct nlmsghdr *nlh, const struct nlattr * const tb[])
+{
+	char *acct_name;
+	struct nf_acct *cur;
+	int ret = -ENOENT;
+
+	if (!tb[NFACCT_NAME]) {
+		list_for_each_entry(cur, &nfnl_acct_list, head)
+			nfnl_acct_try_del(cur);
+
+		return 0;
+	}
+	acct_name = nla_data(tb[NFACCT_NAME]);
+
+	list_for_each_entry(cur, &nfnl_acct_list, head) {
+		if (strncmp(cur->name, acct_name, NFACCT_NAME_MAX) != 0)
+			continue;
+
+		ret = nfnl_acct_try_del(cur);
+		if (ret < 0)
+			return ret;
+
+		break;
+	}
+	return ret;
+}
+
+static const struct nla_policy nfnl_acct_policy[NFACCT_MAX+1] = {
+	[NFACCT_NAME] = { .type = NLA_NUL_STRING, .len = NFACCT_NAME_MAX-1 },
+	[NFACCT_BYTES] = { .type = NLA_U64 },
+	[NFACCT_PKTS] = { .type = NLA_U64 },
+};
+
+static const struct nfnl_callback nfnl_acct_cb[NFNL_MSG_ACCT_MAX] = {
+	[NFNL_MSG_ACCT_NEW]		= { .call = nfnl_acct_new,
+					    .attr_count = NFACCT_MAX,
+					    .policy = nfnl_acct_policy },
+	[NFNL_MSG_ACCT_GET] 		= { .call = nfnl_acct_get,
+					    .attr_count = NFACCT_MAX,
+					    .policy = nfnl_acct_policy },
+	[NFNL_MSG_ACCT_GET_CTRZERO] 	= { .call = nfnl_acct_get,
+					    .attr_count = NFACCT_MAX,
+					    .policy = nfnl_acct_policy },
+	[NFNL_MSG_ACCT_DEL]		= { .call = nfnl_acct_del,
+					    .attr_count = NFACCT_MAX,
+					    .policy = nfnl_acct_policy },
+};
+
+static const struct nfnetlink_subsystem nfnl_acct_subsys = {
+	.name				= "acct",
+	.subsys_id			= NFNL_SUBSYS_ACCT,
+	.cb_count			= NFNL_MSG_ACCT_MAX,
+	.cb				= nfnl_acct_cb,
+};
+
+MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_ACCT);
+
+struct nf_acct *nfnl_acct_find_get(const char *acct_name)
+{
+	struct nf_acct *cur, *acct = NULL;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(cur, &nfnl_acct_list, head) {
+		if (strncmp(cur->name, acct_name, NFACCT_NAME_MAX)!= 0)
+			continue;
+
+		if (!try_module_get(THIS_MODULE))
+			goto err;
+
+		if (!atomic_inc_not_zero(&cur->refcnt)) {
+			module_put(THIS_MODULE);
+			goto err;
+		}
+
+		acct = cur;
+		break;
+	}
+err:
+	rcu_read_unlock();
+	return acct;
+}
+EXPORT_SYMBOL_GPL(nfnl_acct_find_get);
+
+void nfnl_acct_put(struct nf_acct *acct)
+{
+	atomic_dec(&acct->refcnt);
+	module_put(THIS_MODULE);
+}
+EXPORT_SYMBOL_GPL(nfnl_acct_put);
+
+void nfnl_acct_update(const struct sk_buff *skb, struct nf_acct *nfacct)
+{
+	atomic64_inc(&nfacct->pkts);
+	atomic64_add(skb->len, &nfacct->bytes);
+}
+EXPORT_SYMBOL_GPL(nfnl_acct_update);
+
+static int __init nfnl_acct_init(void)
+{
+	int ret;
+
+	pr_info("nfnl_acct: registering with nfnetlink.\n");
+	ret = nfnetlink_subsys_register(&nfnl_acct_subsys);
+	if (ret < 0) {
+		pr_err("nfnl_acct_init: cannot register with nfnetlink.\n");
+		goto err_out;
+	}
+	return 0;
+err_out:
+	return ret;
+}
+
+static void __exit nfnl_acct_exit(void)
+{
+	struct nf_acct *cur, *tmp;
+
+	pr_info("nfnl_acct: unregistering from nfnetlink.\n");
+	nfnetlink_subsys_unregister(&nfnl_acct_subsys);
+
+	list_for_each_entry_safe(cur, tmp, &nfnl_acct_list, head) {
+		list_del_rcu(&cur->head);
+		/* We are sure that our objects have no clients at this point,
+		 * it's safe to release them all without checking refcnt. */
+		kfree_rcu(cur, rcu_head);
+	}
+}
+
+module_init(nfnl_acct_init);
+module_exit(nfnl_acct_exit);

net/netfilter/xt_CT.c

···
 	int ret = 0;
 	u8 proto;
 
-	if (info->flags & ~XT_CT_NOTRACK)
-		return -EINVAL;
+	if (info->flags & ~(XT_CT_NOTRACK | XT_CT_USERSPACE_HELPER))
+		return -EOPNOTSUPP;
 
 	if (info->flags & XT_CT_NOTRACK) {
 		ct = nf_ct_untracked_get();
···
 				  GFP_KERNEL))
 		goto err3;
 
-	if (info->helper[0]) {
+	if (info->flags & XT_CT_USERSPACE_HELPER) {
+		__set_bit(IPS_USERSPACE_HELPER_BIT, &ct->status);
+	} else if (info->helper[0]) {
 		ret = -ENOENT;
 		proto = xt_ct_find_proto(par);
 		if (!proto) {

net/netfilter/xt_connbytes.c

···
 	case XT_CONNBYTES_PKTS:
 		switch (sinfo->direction) {
 		case XT_CONNBYTES_DIR_ORIGINAL:
-			what = counters[IP_CT_DIR_ORIGINAL].packets;
+			what = atomic64_read(&counters[IP_CT_DIR_ORIGINAL].packets);
 			break;
 		case XT_CONNBYTES_DIR_REPLY:
-			what = counters[IP_CT_DIR_REPLY].packets;
+			what = atomic64_read(&counters[IP_CT_DIR_REPLY].packets);
 			break;
 		case XT_CONNBYTES_DIR_BOTH:
-			what = counters[IP_CT_DIR_ORIGINAL].packets;
-			what += counters[IP_CT_DIR_REPLY].packets;
+			what = atomic64_read(&counters[IP_CT_DIR_ORIGINAL].packets);
+			what += atomic64_read(&counters[IP_CT_DIR_REPLY].packets);
 			break;
 		}
 		break;
 	case XT_CONNBYTES_BYTES:
 		switch (sinfo->direction) {
 		case XT_CONNBYTES_DIR_ORIGINAL:
-			what = counters[IP_CT_DIR_ORIGINAL].bytes;
+			what = atomic64_read(&counters[IP_CT_DIR_ORIGINAL].bytes);
 			break;
 		case XT_CONNBYTES_DIR_REPLY:
-			what = counters[IP_CT_DIR_REPLY].bytes;
+			what = atomic64_read(&counters[IP_CT_DIR_REPLY].bytes);
 			break;
 		case XT_CONNBYTES_DIR_BOTH:
-			what = counters[IP_CT_DIR_ORIGINAL].bytes;
-			what += counters[IP_CT_DIR_REPLY].bytes;
+			what = atomic64_read(&counters[IP_CT_DIR_ORIGINAL].bytes);
+			what += atomic64_read(&counters[IP_CT_DIR_REPLY].bytes);
 			break;
 		}
 		break;
 	case XT_CONNBYTES_AVGPKT:
 		switch (sinfo->direction) {
 		case XT_CONNBYTES_DIR_ORIGINAL:
-			bytes = counters[IP_CT_DIR_ORIGINAL].bytes;
-			pkts  = counters[IP_CT_DIR_ORIGINAL].packets;
+			bytes = atomic64_read(&counters[IP_CT_DIR_ORIGINAL].bytes);
+			pkts  = atomic64_read(&counters[IP_CT_DIR_ORIGINAL].packets);
 			break;
 		case XT_CONNBYTES_DIR_REPLY:
-			bytes = counters[IP_CT_DIR_REPLY].bytes;
-			pkts  = counters[IP_CT_DIR_REPLY].packets;
+			bytes = atomic64_read(&counters[IP_CT_DIR_REPLY].bytes);
+			pkts  = atomic64_read(&counters[IP_CT_DIR_REPLY].packets);
 			break;
 		case XT_CONNBYTES_DIR_BOTH:
-			bytes = counters[IP_CT_DIR_ORIGINAL].bytes +
-				counters[IP_CT_DIR_REPLY].bytes;
-			pkts  = counters[IP_CT_DIR_ORIGINAL].packets +
-				counters[IP_CT_DIR_REPLY].packets;
+			bytes = atomic64_read(&counters[IP_CT_DIR_ORIGINAL].bytes) +
+				atomic64_read(&counters[IP_CT_DIR_REPLY].bytes);
+			pkts  = atomic64_read(&counters[IP_CT_DIR_ORIGINAL].packets) +
+				atomic64_read(&counters[IP_CT_DIR_REPLY].packets);
 			break;
 		}
 		if (pkts != 0)

net/netfilter/xt_nfacct.c

···
+/*
+ * (C) 2011 Pablo Neira Ayuso <[e-mail]>
+ * (C) 2011 Intra2net AG <http://www.intra2net.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 (or any
+ * later at your option) as published by the Free Software Foundation.
+ */
+#include <linux/module.h>
+#include <linux/skbuff.h>
+
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter/nfnetlink_acct.h>
+#include <linux/netfilter/xt_nfacct.h>
+
+MODULE_AUTHOR("Pablo Neira Ayuso <[e-mail]>");
+MODULE_DESCRIPTION("Xtables: match for the extended accounting infrastructure");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("ipt_nfacct");
+MODULE_ALIAS("ip6t_nfacct");
+
+static bool nfacct_mt(const struct sk_buff *skb, struct xt_action_param *par)
+{
+	const struct xt_nfacct_match_info *info = par->targinfo;
+
+	nfnl_acct_update(skb, info->nfacct);
+
+	return true;
+}
+
+static int
+nfacct_mt_checkentry(const struct xt_mtchk_param *par)
+{
+	struct xt_nfacct_match_info *info = par->matchinfo;
+	struct nf_acct *nfacct;
+
+	nfacct = nfnl_acct_find_get(info->name);
+	if (nfacct == NULL) {
+		pr_info("xt_nfacct: accounting object with name `%s' "
+			"does not exists\n", info->name);
+		return -ENOENT;
+	}
+	info->nfacct = nfacct;
+	return 0;
+}
+
+static void
+nfacct_mt_destroy(const struct xt_mtdtor_param *par)
+{
+	const struct xt_nfacct_match_info *info = par->matchinfo;
+
+	nfnl_acct_put(info->nfacct);
+}
+
+static struct xt_match nfacct_mt_reg __read_mostly = {
+	.name       = "nfacct",
+	.family     = NFPROTO_UNSPEC,
+	.checkentry = nfacct_mt_checkentry,
+	.match      = nfacct_mt,
+	.destroy    = nfacct_mt_destroy,
+	.matchsize  = sizeof(struct xt_nfacct_match_info),
+	.me         = THIS_MODULE,
+};
+
+static int __init nfacct_mt_init(void)
+{
+	return xt_register_match(&nfacct_mt_reg);
+}
+
+static void __exit nfacct_mt_exit(void)
+{
+	xt_unregister_match(&nfacct_mt_reg);
+}
+
+module_init(nfacct_mt_init);
+module_exit(nfacct_mt_exit);