Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-2.6.26

38 files changed, 1159 insertions, 340 deletions

diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig
index daf5b881064d..c1fc0f1a641c 100644
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -86,6 +86,16 @@ config NF_CONNTRACK_EVENTS
 
 	  If unsure, say `N'.
 
+config NF_CT_PROTO_DCCP
+	tristate 'DCCP protocol connection tracking support (EXPERIMENTAL)'
+	depends on EXPERIMENTAL && NF_CONNTRACK
+	depends on NETFILTER_ADVANCED
+	help
+	  With this option enabled, the layer 3 independent connection
+	  tracking code will be able to do state tracking on DCCP connections.
+
+	  If unsure, say 'N'.
+
 config NF_CT_PROTO_GRE
 	tristate
 	depends on NF_CONNTRACK
diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile
index ea7508387f95..5c4b183f6422 100644
--- a/net/netfilter/Makefile
+++ b/net/netfilter/Makefile
@@ -13,6 +13,7 @@ obj-$(CONFIG_NETFILTER_NETLINK_LOG) += nfnetlink_log.o
 obj-$(CONFIG_NF_CONNTRACK) += nf_conntrack.o
 
 # SCTP protocol connection tracking
+obj-$(CONFIG_NF_CT_PROTO_DCCP) += nf_conntrack_proto_dccp.o
 obj-$(CONFIG_NF_CT_PROTO_GRE) += nf_conntrack_proto_gre.o
 obj-$(CONFIG_NF_CT_PROTO_SCTP) += nf_conntrack_proto_sctp.o
 obj-$(CONFIG_NF_CT_PROTO_UDPLITE) += nf_conntrack_proto_udplite.o
diff --git a/net/netfilter/nf_conntrack_amanda.c b/net/netfilter/nf_conntrack_amanda.c
index d14585a19b7d..38aedeeaf4e1 100644
--- a/net/netfilter/nf_conntrack_amanda.c
+++ b/net/netfilter/nf_conntrack_amanda.c
@@ -53,7 +53,7 @@ enum amanda_strings {
 };
 
 static struct {
-	char			*string;
+	const char		*string;
 	size_t			len;
 	struct ts_config	*ts;
 } search[] __read_mostly = {
@@ -91,7 +91,6 @@ static int amanda_help(struct sk_buff *skb,
 	char pbuf[sizeof("65535")], *tmp;
 	u_int16_t len;
 	__be16 port;
-	int family = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num;
 	int ret = NF_ACCEPT;
 	typeof(nf_nat_amanda_hook) nf_nat_amanda;
 
@@ -148,7 +147,8 @@ static int amanda_help(struct sk_buff *skb,
 			goto out;
 		}
 		tuple = &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple;
-		nf_ct_expect_init(exp, NF_CT_EXPECT_CLASS_DEFAULT, family,
+		nf_ct_expect_init(exp, NF_CT_EXPECT_CLASS_DEFAULT,
+				  nf_ct_l3num(ct),
 				  &tuple->src.u3, &tuple->dst.u3,
 				  IPPROTO_TCP, NULL, &port);
 
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index b77eb56a87e3..4eac65c74ed0 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -94,7 +94,7 @@ static inline u_int32_t hash_conntrack(const struct nf_conntrack_tuple *tuple)
 				nf_conntrack_hash_rnd);
 }
 
-int
+bool
 nf_ct_get_tuple(const struct sk_buff *skb,
 		unsigned int nhoff,
 		unsigned int dataoff,
@@ -108,7 +108,7 @@ nf_ct_get_tuple(const struct sk_buff *skb,
 
 	tuple->src.l3num = l3num;
 	if (l3proto->pkt_to_tuple(skb, nhoff, tuple) == 0)
-		return 0;
+		return false;
 
 	tuple->dst.protonum = protonum;
 	tuple->dst.dir = IP_CT_DIR_ORIGINAL;
@@ -117,10 +117,8 @@ nf_ct_get_tuple(const struct sk_buff *skb,
 }
 EXPORT_SYMBOL_GPL(nf_ct_get_tuple);
 
-int nf_ct_get_tuplepr(const struct sk_buff *skb,
-		      unsigned int nhoff,
-		      u_int16_t l3num,
-		      struct nf_conntrack_tuple *tuple)
+bool nf_ct_get_tuplepr(const struct sk_buff *skb, unsigned int nhoff,
+		       u_int16_t l3num, struct nf_conntrack_tuple *tuple)
 {
 	struct nf_conntrack_l3proto *l3proto;
 	struct nf_conntrack_l4proto *l4proto;
@@ -134,7 +132,7 @@ int nf_ct_get_tuplepr(const struct sk_buff *skb,
 	ret = l3proto->get_l4proto(skb, nhoff, &protoff, &protonum);
 	if (ret != NF_ACCEPT) {
 		rcu_read_unlock();
-		return 0;
+		return false;
 	}
 
 	l4proto = __nf_ct_l4proto_find(l3num, protonum);
@@ -147,7 +145,7 @@ int nf_ct_get_tuplepr(const struct sk_buff *skb,
 }
 EXPORT_SYMBOL_GPL(nf_ct_get_tuplepr);
 
-int
+bool
 nf_ct_invert_tuple(struct nf_conntrack_tuple *inverse,
 		   const struct nf_conntrack_tuple *orig,
 		   const struct nf_conntrack_l3proto *l3proto,
@@ -157,7 +155,7 @@ nf_ct_invert_tuple(struct nf_conntrack_tuple *inverse,
 
 	inverse->src.l3num = orig->src.l3num;
 	if (l3proto->invert_tuple(inverse, orig) == 0)
-		return 0;
+		return false;
 
 	inverse->dst.dir = !orig->dst.dir;
 
@@ -194,8 +192,7 @@ destroy_conntrack(struct nf_conntrack *nfct)
 	 * destroy_conntrack() MUST NOT be called with a write lock
 	 * to nf_conntrack_lock!!! -HW */
 	rcu_read_lock();
-	l4proto = __nf_ct_l4proto_find(ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.l3num,
-				       ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.protonum);
+	l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
 	if (l4proto && l4proto->destroy)
 		l4proto->destroy(ct);
 
@@ -739,10 +736,10 @@ nf_conntrack_in(int pf, unsigned int hooknum, struct sk_buff *skb)
 }
 EXPORT_SYMBOL_GPL(nf_conntrack_in);
 
-int nf_ct_invert_tuplepr(struct nf_conntrack_tuple *inverse,
-			 const struct nf_conntrack_tuple *orig)
+bool nf_ct_invert_tuplepr(struct nf_conntrack_tuple *inverse,
+			  const struct nf_conntrack_tuple *orig)
 {
-	int ret;
+	bool ret;
 
 	rcu_read_lock();
 	ret = nf_ct_invert_tuple(inverse, orig,
@@ -766,10 +763,10 @@ void nf_conntrack_alter_reply(struct nf_conn *ct,
 	NF_CT_ASSERT(!nf_ct_is_confirmed(ct));
 
 	pr_debug("Altering reply tuple of %p to ", ct);
-	NF_CT_DUMP_TUPLE(newreply);
+	nf_ct_dump_tuple(newreply);
 
 	ct->tuplehash[IP_CT_DIR_REPLY].tuple = *newreply;
-	if (ct->master || (help && help->expecting != 0))
+	if (ct->master || (help && !hlist_empty(&help->expectations)))
 		return;
 
 	rcu_read_lock();
diff --git a/net/netfilter/nf_conntrack_extend.c b/net/netfilter/nf_conntrack_extend.c
index 2bd9963b5b3e..bcc19fa4ed1e 100644
--- a/net/netfilter/nf_conntrack_extend.c
+++ b/net/netfilter/nf_conntrack_extend.c
@@ -71,6 +71,9 @@ void *__nf_ct_ext_add(struct nf_conn *ct, enum nf_ct_ext_id id, gfp_t gfp)
 	int i, newlen, newoff;
 	struct nf_ct_ext_type *t;
 
+	/* Conntrack must not be confirmed to avoid races on reallocation. */
+	NF_CT_ASSERT(!nf_ct_is_confirmed(ct));
+
 	if (!ct->ext)
 		return nf_ct_ext_create(&ct->ext, id, gfp);
 
diff --git a/net/netfilter/nf_conntrack_ftp.c b/net/netfilter/nf_conntrack_ftp.c
index 7eff876bb8bc..bb20672fe036 100644
--- a/net/netfilter/nf_conntrack_ftp.c
+++ b/net/netfilter/nf_conntrack_ftp.c
@@ -350,8 +350,9 @@ static int help(struct sk_buff *skb,
 		enum ip_conntrack_info ctinfo)
 {
 	unsigned int dataoff, datalen;
-	struct tcphdr _tcph, *th;
-	char *fb_ptr;
+	const struct tcphdr *th;
+	struct tcphdr _tcph;
+	const char *fb_ptr;
 	int ret;
 	u32 seq;
 	int dir = CTINFO2DIR(ctinfo);
@@ -405,7 +406,7 @@ static int help(struct sk_buff *skb,
 
 	/* Initialize IP/IPv6 addr to expected address (it's not mentioned
 	   in EPSV responses) */
-	cmd.l3num = ct->tuplehash[dir].tuple.src.l3num;
+	cmd.l3num = nf_ct_l3num(ct);
 	memcpy(cmd.u3.all, &ct->tuplehash[dir].tuple.src.u3.all,
 	       sizeof(cmd.u3.all));
 
@@ -452,7 +453,7 @@ static int help(struct sk_buff *skb,
 	daddr = &ct->tuplehash[!dir].tuple.dst.u3;
 
 	/* Update the ftp info */
-	if ((cmd.l3num == ct->tuplehash[dir].tuple.src.l3num) &&
+	if ((cmd.l3num == nf_ct_l3num(ct)) &&
 	    memcmp(&cmd.u3.all, &ct->tuplehash[dir].tuple.src.u3.all,
 		     sizeof(cmd.u3.all))) {
 		/* Enrico Scholz's passive FTP to partially RNAT'd ftp
diff --git a/net/netfilter/nf_conntrack_h323_main.c b/net/netfilter/nf_conntrack_h323_main.c
index 505052d495cf..95da1a24aab7 100644
--- a/net/netfilter/nf_conntrack_h323_main.c
+++ b/net/netfilter/nf_conntrack_h323_main.c
@@ -218,7 +218,6 @@ static int get_h245_addr(struct nf_conn *ct, const unsigned char *data,
 			 union nf_inet_addr *addr, __be16 *port)
 {
 	const unsigned char *p;
-	int family = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num;
 	int len;
 
 	if (taddr->choice != eH245_TransportAddress_unicastAddress)
@@ -226,13 +225,13 @@ static int get_h245_addr(struct nf_conn *ct, const unsigned char *data,
 
 	switch (taddr->unicastAddress.choice) {
 	case eUnicastAddress_iPAddress:
-		if (family != AF_INET)
+		if (nf_ct_l3num(ct) != AF_INET)
 			return 0;
 		p = data + taddr->unicastAddress.iPAddress.network;
 		len = 4;
 		break;
 	case eUnicastAddress_iP6Address:
-		if (family != AF_INET6)
+		if (nf_ct_l3num(ct) != AF_INET6)
 			return 0;
 		p = data + taddr->unicastAddress.iP6Address.network;
 		len = 16;
@@ -277,8 +276,7 @@ static int expect_rtp_rtcp(struct sk_buff *skb, struct nf_conn *ct,
 	/* Create expect for RTP */
 	if ((rtp_exp = nf_ct_expect_alloc(ct)) == NULL)
 		return -1;
-	nf_ct_expect_init(rtp_exp, NF_CT_EXPECT_CLASS_DEFAULT,
-			  ct->tuplehash[!dir].tuple.src.l3num,
+	nf_ct_expect_init(rtp_exp, NF_CT_EXPECT_CLASS_DEFAULT, nf_ct_l3num(ct),
 			  &ct->tuplehash[!dir].tuple.src.u3,
 			  &ct->tuplehash[!dir].tuple.dst.u3,
 			  IPPROTO_UDP, NULL, &rtp_port);
@@ -288,8 +286,7 @@ static int expect_rtp_rtcp(struct sk_buff *skb, struct nf_conn *ct,
 		nf_ct_expect_put(rtp_exp);
 		return -1;
 	}
-	nf_ct_expect_init(rtcp_exp, NF_CT_EXPECT_CLASS_DEFAULT,
-			  ct->tuplehash[!dir].tuple.src.l3num,
+	nf_ct_expect_init(rtcp_exp, NF_CT_EXPECT_CLASS_DEFAULT, nf_ct_l3num(ct),
 			  &ct->tuplehash[!dir].tuple.src.u3,
 			  &ct->tuplehash[!dir].tuple.dst.u3,
 			  IPPROTO_UDP, NULL, &rtcp_port);
@@ -306,9 +303,9 @@ static int expect_rtp_rtcp(struct sk_buff *skb, struct nf_conn *ct,
 		if (nf_ct_expect_related(rtp_exp) == 0) {
 			if (nf_ct_expect_related(rtcp_exp) == 0) {
 				pr_debug("nf_ct_h323: expect RTP ");
-				NF_CT_DUMP_TUPLE(&rtp_exp->tuple);
+				nf_ct_dump_tuple(&rtp_exp->tuple);
 				pr_debug("nf_ct_h323: expect RTCP ");
-				NF_CT_DUMP_TUPLE(&rtcp_exp->tuple);
+				nf_ct_dump_tuple(&rtcp_exp->tuple);
 			} else {
 				nf_ct_unexpect_related(rtp_exp);
 				ret = -1;
@@ -346,8 +343,7 @@ static int expect_t120(struct sk_buff *skb,
 	/* Create expect for T.120 connections */
 	if ((exp = nf_ct_expect_alloc(ct)) == NULL)
 		return -1;
-	nf_ct_expect_init(exp, NF_CT_EXPECT_CLASS_DEFAULT,
-			  ct->tuplehash[!dir].tuple.src.l3num,
+	nf_ct_expect_init(exp, NF_CT_EXPECT_CLASS_DEFAULT, nf_ct_l3num(ct),
 			  &ct->tuplehash[!dir].tuple.src.u3,
 			  &ct->tuplehash[!dir].tuple.dst.u3,
 			  IPPROTO_TCP, NULL, &port);
@@ -364,7 +360,7 @@ static int expect_t120(struct sk_buff *skb,
 	} else {		/* Conntrack only */
 		if (nf_ct_expect_related(exp) == 0) {
 			pr_debug("nf_ct_h323: expect T.120 ");
-			NF_CT_DUMP_TUPLE(&exp->tuple);
+			nf_ct_dump_tuple(&exp->tuple);
 		} else
 			ret = -1;
 	}
@@ -586,7 +582,7 @@ static int h245_help(struct sk_buff *skb, unsigned int protoff,
 	while (get_tpkt_data(skb, protoff, ct, ctinfo,
 			     &data, &datalen, &dataoff)) {
 		pr_debug("nf_ct_h245: TPKT len=%d ", datalen);
-		NF_CT_DUMP_TUPLE(&ct->tuplehash[CTINFO2DIR(ctinfo)].tuple);
+		nf_ct_dump_tuple(&ct->tuplehash[CTINFO2DIR(ctinfo)].tuple);
 
 		/* Decode H.245 signal */
 		ret = DecodeMultimediaSystemControlMessage(data, datalen,
@@ -634,18 +630,17 @@ int get_h225_addr(struct nf_conn *ct, unsigned char *data,
 		  union nf_inet_addr *addr, __be16 *port)
 {
 	const unsigned char *p;
-	int family = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num;
 	int len;
 
 	switch (taddr->choice) {
 	case eTransportAddress_ipAddress:
-		if (family != AF_INET)
+		if (nf_ct_l3num(ct) != AF_INET)
 			return 0;
 		p = data + taddr->ipAddress.ip;
 		len = 4;
 		break;
 	case eTransportAddress_ip6Address:
-		if (family != AF_INET6)
+		if (nf_ct_l3num(ct) != AF_INET6)
 			return 0;
 		p = data + taddr->ip6Address.ip;
 		len = 16;
@@ -683,8 +678,7 @@ static int expect_h245(struct sk_buff *skb, struct nf_conn *ct,
 	/* Create expect for h245 connection */
 	if ((exp = nf_ct_expect_alloc(ct)) == NULL)
 		return -1;
-	nf_ct_expect_init(exp, NF_CT_EXPECT_CLASS_DEFAULT,
-			  ct->tuplehash[!dir].tuple.src.l3num,
+	nf_ct_expect_init(exp, NF_CT_EXPECT_CLASS_DEFAULT, nf_ct_l3num(ct),
 			  &ct->tuplehash[!dir].tuple.src.u3,
 			  &ct->tuplehash[!dir].tuple.dst.u3,
 			  IPPROTO_TCP, NULL, &port);
@@ -701,7 +695,7 @@ static int expect_h245(struct sk_buff *skb, struct nf_conn *ct,
 	} else {		/* Conntrack only */
 		if (nf_ct_expect_related(exp) == 0) {
 			pr_debug("nf_ct_q931: expect H.245 ");
-			NF_CT_DUMP_TUPLE(&exp->tuple);
+			nf_ct_dump_tuple(&exp->tuple);
 		} else
 			ret = -1;
 	}
@@ -792,7 +786,7 @@ static int expect_callforwarding(struct sk_buff *skb,
 	 * we don't need to track the second call */
 	if (callforward_filter &&
 	    callforward_do_filter(&addr, &ct->tuplehash[!dir].tuple.src.u3,
-				  ct->tuplehash[!dir].tuple.src.l3num)) {
+				  nf_ct_l3num(ct))) {
 		pr_debug("nf_ct_q931: Call Forwarding not tracked\n");
 		return 0;
 	}
@@ -800,8 +794,7 @@ static int expect_callforwarding(struct sk_buff *skb,
 	/* Create expect for the second call leg */
 	if ((exp = nf_ct_expect_alloc(ct)) == NULL)
 		return -1;
-	nf_ct_expect_init(exp, NF_CT_EXPECT_CLASS_DEFAULT,
-			  ct->tuplehash[!dir].tuple.src.l3num,
+	nf_ct_expect_init(exp, NF_CT_EXPECT_CLASS_DEFAULT, nf_ct_l3num(ct),
 			  &ct->tuplehash[!dir].tuple.src.u3, &addr,
 			  IPPROTO_TCP, NULL, &port);
 	exp->helper = nf_conntrack_helper_q931;
@@ -817,7 +810,7 @@ static int expect_callforwarding(struct sk_buff *skb,
 	} else {		/* Conntrack only */
 		if (nf_ct_expect_related(exp) == 0) {
 			pr_debug("nf_ct_q931: expect Call Forwarding ");
-			NF_CT_DUMP_TUPLE(&exp->tuple);
+			nf_ct_dump_tuple(&exp->tuple);
 		} else
 			ret = -1;
 	}
@@ -1137,7 +1130,7 @@ static int q931_help(struct sk_buff *skb, unsigned int protoff,
 	while (get_tpkt_data(skb, protoff, ct, ctinfo,
 			     &data, &datalen, &dataoff)) {
 		pr_debug("nf_ct_q931: TPKT len=%d ", datalen);
-		NF_CT_DUMP_TUPLE(&ct->tuplehash[CTINFO2DIR(ctinfo)].tuple);
+		nf_ct_dump_tuple(&ct->tuplehash[CTINFO2DIR(ctinfo)].tuple);
 
 		/* Decode Q.931 signal */
 		ret = DecodeQ931(data, datalen, &q931);
@@ -1272,8 +1265,7 @@ static int expect_q931(struct sk_buff *skb, struct nf_conn *ct,
 	/* Create expect for Q.931 */
 	if ((exp = nf_ct_expect_alloc(ct)) == NULL)
 		return -1;
-	nf_ct_expect_init(exp, NF_CT_EXPECT_CLASS_DEFAULT,
-			  ct->tuplehash[!dir].tuple.src.l3num,
+	nf_ct_expect_init(exp, NF_CT_EXPECT_CLASS_DEFAULT, nf_ct_l3num(ct),
 			  gkrouted_only ? /* only accept calls from GK? */
 				&ct->tuplehash[!dir].tuple.src.u3 : NULL,
 			  &ct->tuplehash[!dir].tuple.dst.u3,
@@ -1287,7 +1279,7 @@ static int expect_q931(struct sk_buff *skb, struct nf_conn *ct,
 	} else {		/* Conntrack only */
 		if (nf_ct_expect_related(exp) == 0) {
 			pr_debug("nf_ct_ras: expect Q.931 ");
-			NF_CT_DUMP_TUPLE(&exp->tuple);
+			nf_ct_dump_tuple(&exp->tuple);
 
 			/* Save port for looking up expect in processing RCF */
 			info->sig_port[dir] = port;
@@ -1344,15 +1336,14 @@ static int process_gcf(struct sk_buff *skb, struct nf_conn *ct,
 	/* Need new expect */
 	if ((exp = nf_ct_expect_alloc(ct)) == NULL)
 		return -1;
-	nf_ct_expect_init(exp, NF_CT_EXPECT_CLASS_DEFAULT,
-			  ct->tuplehash[!dir].tuple.src.l3num,
+	nf_ct_expect_init(exp, NF_CT_EXPECT_CLASS_DEFAULT, nf_ct_l3num(ct),
 			  &ct->tuplehash[!dir].tuple.src.u3, &addr,
 			  IPPROTO_UDP, NULL, &port);
 	exp->helper = nf_conntrack_helper_ras;
 
 	if (nf_ct_expect_related(exp) == 0) {
 		pr_debug("nf_ct_ras: expect RAS ");
-		NF_CT_DUMP_TUPLE(&exp->tuple);
+		nf_ct_dump_tuple(&exp->tuple);
 	} else
 		ret = -1;
 
@@ -1436,7 +1427,7 @@ static int process_rcf(struct sk_buff *skb, struct nf_conn *ct,
 			pr_debug("nf_ct_ras: set Q.931 expect "
 				 "timeout to %u seconds for",
 				 info->timeout);
-			NF_CT_DUMP_TUPLE(&exp->tuple);
+			nf_ct_dump_tuple(&exp->tuple);
 			set_expect_timeout(exp, info->timeout);
 		}
 		spin_unlock_bh(&nf_conntrack_lock);
@@ -1549,8 +1540,7 @@ static int process_acf(struct sk_buff *skb, struct nf_conn *ct,
 	/* Need new expect */
 	if ((exp = nf_ct_expect_alloc(ct)) == NULL)
 		return -1;
-	nf_ct_expect_init(exp, NF_CT_EXPECT_CLASS_DEFAULT,
-			  ct->tuplehash[!dir].tuple.src.l3num,
+	nf_ct_expect_init(exp, NF_CT_EXPECT_CLASS_DEFAULT, nf_ct_l3num(ct),
 			  &ct->tuplehash[!dir].tuple.src.u3, &addr,
 			  IPPROTO_TCP, NULL, &port);
 	exp->flags = NF_CT_EXPECT_PERMANENT;
@@ -1558,7 +1548,7 @@ static int process_acf(struct sk_buff *skb, struct nf_conn *ct,
 
 	if (nf_ct_expect_related(exp) == 0) {
 		pr_debug("nf_ct_ras: expect Q.931 ");
-		NF_CT_DUMP_TUPLE(&exp->tuple);
+		nf_ct_dump_tuple(&exp->tuple);
 	} else
 		ret = -1;
 
@@ -1603,8 +1593,7 @@ static int process_lcf(struct sk_buff *skb, struct nf_conn *ct,
 	/* Need new expect for call signal */
 	if ((exp = nf_ct_expect_alloc(ct)) == NULL)
 		return -1;
-	nf_ct_expect_init(exp, NF_CT_EXPECT_CLASS_DEFAULT,
-			  ct->tuplehash[!dir].tuple.src.l3num,
+	nf_ct_expect_init(exp, NF_CT_EXPECT_CLASS_DEFAULT, nf_ct_l3num(ct),
 			  &ct->tuplehash[!dir].tuple.src.u3, &addr,
 			  IPPROTO_TCP, NULL, &port);
 	exp->flags = NF_CT_EXPECT_PERMANENT;
@@ -1612,7 +1601,7 @@ static int process_lcf(struct sk_buff *skb, struct nf_conn *ct,
 
 	if (nf_ct_expect_related(exp) == 0) {
 		pr_debug("nf_ct_ras: expect Q.931 ");
-		NF_CT_DUMP_TUPLE(&exp->tuple);
+		nf_ct_dump_tuple(&exp->tuple);
 	} else
 		ret = -1;
 
@@ -1716,7 +1705,7 @@ static int ras_help(struct sk_buff *skb, unsigned int protoff,
 	if (data == NULL)
 		goto accept;
 	pr_debug("nf_ct_ras: RAS message len=%d ", datalen);
-	NF_CT_DUMP_TUPLE(&ct->tuplehash[CTINFO2DIR(ctinfo)].tuple);
+	nf_ct_dump_tuple(&ct->tuplehash[CTINFO2DIR(ctinfo)].tuple);
 
 	/* Decode RAS message */
 	ret = DecodeRasMessage(data, datalen, &ras);
diff --git a/net/netfilter/nf_conntrack_helper.c b/net/netfilter/nf_conntrack_helper.c
index e350f56d43c9..7d1b11703741 100644
--- a/net/netfilter/nf_conntrack_helper.c
+++ b/net/netfilter/nf_conntrack_helper.c
@@ -126,7 +126,7 @@ void nf_conntrack_helper_unregister(struct nf_conntrack_helper *me)
 {
 	struct nf_conntrack_tuple_hash *h;
 	struct nf_conntrack_expect *exp;
-	struct hlist_node *n, *next;
+	const struct hlist_node *n, *next;
 	unsigned int i;
 
 	mutex_lock(&nf_ct_helper_mutex);
diff --git a/net/netfilter/nf_conntrack_irc.c b/net/netfilter/nf_conntrack_irc.c
index 02f21cbe5ae7..1b1226d6653f 100644
--- a/net/netfilter/nf_conntrack_irc.c
+++ b/net/netfilter/nf_conntrack_irc.c
@@ -50,7 +50,7 @@ MODULE_PARM_DESC(max_dcc_channels, "max number of expected DCC channels per "
 module_param(dcc_timeout, uint, 0400);
 MODULE_PARM_DESC(dcc_timeout, "timeout on for unestablished DCC channels");
 
-static const char *dccprotos[] = {
+static const char *const dccprotos[] = {
 	"SEND ", "CHAT ", "MOVE ", "TSEND ", "SCHAT "
 };
 
@@ -65,7 +65,7 @@ static const char *dccprotos[] = {
  *	ad_beg_p	returns pointer to first byte of addr data
  *	ad_end_p	returns pointer to last byte of addr data
  */
-static int parse_dcc(char *data, char *data_end, u_int32_t *ip,
+static int parse_dcc(char *data, const char *data_end, u_int32_t *ip,
 		     u_int16_t *port, char **ad_beg_p, char **ad_end_p)
 {
 	/* at least 12: "AAAAAAAA P\1\n" */
@@ -93,9 +93,11 @@ static int help(struct sk_buff *skb, unsigned int protoff,
 		struct nf_conn *ct, enum ip_conntrack_info ctinfo)
 {
 	unsigned int dataoff;
-	struct iphdr *iph;
-	struct tcphdr _tcph, *th;
-	char *data, *data_limit, *ib_ptr;
+	const struct iphdr *iph;
+	const struct tcphdr *th;
+	struct tcphdr _tcph;
+	const char *data_limit;
+	char *data, *ib_ptr;
 	int dir = CTINFO2DIR(ctinfo);
 	struct nf_conntrack_expect *exp;
 	struct nf_conntrack_tuple *tuple;
@@ -159,7 +161,7 @@ static int help(struct sk_buff *skb, unsigned int protoff,
 			/* we have at least
 			 * (19+MINMATCHLEN)-5-dccprotos[i].matchlen bytes valid
 			 * data left (== 14/13 bytes) */
-			if (parse_dcc((char *)data, data_limit, &dcc_ip,
+			if (parse_dcc(data, data_limit, &dcc_ip,
 				       &dcc_port, &addr_beg_p, &addr_end_p)) {
 				pr_debug("unable to parse dcc command\n");
 				continue;
diff --git a/net/netfilter/nf_conntrack_l3proto_generic.c b/net/netfilter/nf_conntrack_l3proto_generic.c
index 8e914e5ffea8..e7eb807fe07d 100644
--- a/net/netfilter/nf_conntrack_l3proto_generic.c
+++ b/net/netfilter/nf_conntrack_l3proto_generic.c
@@ -31,22 +31,22 @@
 #include <net/netfilter/nf_conntrack_core.h>
 #include <net/netfilter/ipv4/nf_conntrack_ipv4.h>
 
-static int generic_pkt_to_tuple(const struct sk_buff *skb, unsigned int nhoff,
-				struct nf_conntrack_tuple *tuple)
+static bool generic_pkt_to_tuple(const struct sk_buff *skb, unsigned int nhoff,
+				 struct nf_conntrack_tuple *tuple)
 {
 	memset(&tuple->src.u3, 0, sizeof(tuple->src.u3));
 	memset(&tuple->dst.u3, 0, sizeof(tuple->dst.u3));
 
-	return 1;
+	return true;
 }
 
-static int generic_invert_tuple(struct nf_conntrack_tuple *tuple,
-			   const struct nf_conntrack_tuple *orig)
+static bool generic_invert_tuple(struct nf_conntrack_tuple *tuple,
+				 const struct nf_conntrack_tuple *orig)
 {
 	memset(&tuple->src.u3, 0, sizeof(tuple->src.u3));
 	memset(&tuple->dst.u3, 0, sizeof(tuple->dst.u3));
 
-	return 1;
+	return true;
 }
 
 static int generic_print_tuple(struct seq_file *s,
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index 4a1b42b2b7a5..16774ecd1c4e 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -145,10 +145,11 @@ nla_put_failure:
 static inline int
 ctnetlink_dump_protoinfo(struct sk_buff *skb, const struct nf_conn *ct)
 {
-	struct nf_conntrack_l4proto *l4proto = nf_ct_l4proto_find_get(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num, ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum);
+	struct nf_conntrack_l4proto *l4proto;
 	struct nlattr *nest_proto;
 	int ret;
 
+	l4proto = nf_ct_l4proto_find_get(nf_ct_l3num(ct), nf_ct_protonum(ct));
 	if (!l4proto->to_nlattr) {
 		nf_ct_l4proto_put(l4proto);
 		return 0;
@@ -368,8 +369,7 @@ ctnetlink_fill_info(struct sk_buff *skb, u32 pid, u32 seq,
 	nfmsg  = NLMSG_DATA(nlh);
 
 	nlh->nlmsg_flags    = (nowait && pid) ? NLM_F_MULTI : 0;
-	nfmsg->nfgen_family =
-		ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num;
+	nfmsg->nfgen_family = nf_ct_l3num(ct);
 	nfmsg->version      = NFNETLINK_V0;
 	nfmsg->res_id	    = 0;
 
@@ -454,7 +454,7 @@ static int ctnetlink_conntrack_event(struct notifier_block *this,
 	nfmsg = NLMSG_DATA(nlh);
 
 	nlh->nlmsg_flags    = flags;
-	nfmsg->nfgen_family = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num;
+	nfmsg->nfgen_family = nf_ct_l3num(ct);
 	nfmsg->version	= NFNETLINK_V0;
 	nfmsg->res_id	= 0;
 
@@ -535,8 +535,6 @@ static int ctnetlink_done(struct netlink_callback *cb)
 	return 0;
 }
 
-#define L3PROTO(ct) (ct)->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num
-
 static int
 ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
 {
@@ -558,7 +556,7 @@ restart:
 			/* Dump entries of a given L3 protocol number.
 			 * If it is not specified, ie. l3proto == 0,
 			 * then dump everything. */
-			if (l3proto && L3PROTO(ct) != l3proto)
+			if (l3proto && nf_ct_l3num(ct) != l3proto)
 				continue;
 			if (cb->args[1]) {
 				if (ct != last)
@@ -704,20 +702,11 @@ static int nfnetlink_parse_nat_proto(struct nlattr *attr,
 	if (err < 0)
 		return err;
 
-	npt = nf_nat_proto_find_get(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum);
-
-	if (!npt->nlattr_to_range) {
-		nf_nat_proto_put(npt);
-		return 0;
-	}
-
-	/* nlattr_to_range returns 1 if it parsed, 0 if not, neg. on error */
-	if (npt->nlattr_to_range(tb, range) > 0)
-		range->flags |= IP_NAT_RANGE_PROTO_SPECIFIED;
-
+	npt = nf_nat_proto_find_get(nf_ct_protonum(ct));
+	if (npt->nlattr_to_range)
+		err = npt->nlattr_to_range(tb, range);
 	nf_nat_proto_put(npt);
-
-	return 0;
+	return err;
 }
 
 static const struct nla_policy nat_nla_policy[CTA_NAT_MAX+1] = {
@@ -1010,14 +999,11 @@ ctnetlink_change_protoinfo(struct nf_conn *ct, struct nlattr *cda[])
 {
 	struct nlattr *tb[CTA_PROTOINFO_MAX+1], *attr = cda[CTA_PROTOINFO];
 	struct nf_conntrack_l4proto *l4proto;
-	u_int16_t npt = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum;
-	u_int16_t l3num = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num;
 	int err = 0;
 
 	nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, NULL);
 
-	l4proto = nf_ct_l4proto_find_get(l3num, npt);
-
+	l4proto = nf_ct_l4proto_find_get(nf_ct_l3num(ct), nf_ct_protonum(ct));
 	if (l4proto->from_nlattr)
 		err = l4proto->from_nlattr(tb, ct);
 	nf_ct_l4proto_put(l4proto);
diff --git a/net/netfilter/nf_conntrack_pptp.c b/net/netfilter/nf_conntrack_pptp.c
index 8fd83470d1b3..97e54b0e43a3 100644
--- a/net/netfilter/nf_conntrack_pptp.c
+++ b/net/netfilter/nf_conntrack_pptp.c
@@ -119,7 +119,7 @@ static void pptp_expectfn(struct nf_conn *ct,
 		/* obviously this tuple inversion only works until you do NAT */
 		nf_ct_invert_tuplepr(&inv_t, &exp->tuple);
 		pr_debug("trying to unexpect other dir: ");
-		NF_CT_DUMP_TUPLE(&inv_t);
+		nf_ct_dump_tuple(&inv_t);
 
 		exp_other = nf_ct_expect_find_get(&inv_t);
 		if (exp_other) {
@@ -141,7 +141,7 @@ static int destroy_sibling_or_exp(const struct nf_conntrack_tuple *t)
 	struct nf_conn *sibling;
 
 	pr_debug("trying to timeout ct or exp for tuple ");
-	NF_CT_DUMP_TUPLE(t);
+	nf_ct_dump_tuple(t);
 
 	h = nf_conntrack_find_get(t);
 	if (h)  {
@@ -209,7 +209,7 @@ static int exp_gre(struct nf_conn *ct, __be16 callid, __be16 peer_callid)
 	/* original direction, PNS->PAC */
 	dir = IP_CT_DIR_ORIGINAL;
 	nf_ct_expect_init(exp_orig, NF_CT_EXPECT_CLASS_DEFAULT,
-			  ct->tuplehash[dir].tuple.src.l3num,
+			  nf_ct_l3num(ct),
 			  &ct->tuplehash[dir].tuple.src.u3,
 			  &ct->tuplehash[dir].tuple.dst.u3,
 			  IPPROTO_GRE, &peer_callid, &callid);
@@ -218,7 +218,7 @@ static int exp_gre(struct nf_conn *ct, __be16 callid, __be16 peer_callid)
 	/* reply direction, PAC->PNS */
 	dir = IP_CT_DIR_REPLY;
 	nf_ct_expect_init(exp_reply, NF_CT_EXPECT_CLASS_DEFAULT,
-			  ct->tuplehash[dir].tuple.src.l3num,
+			  nf_ct_l3num(ct),
 			  &ct->tuplehash[dir].tuple.src.u3,
 			  &ct->tuplehash[dir].tuple.dst.u3,
 			  IPPROTO_GRE, &callid, &peer_callid);
diff --git a/net/netfilter/nf_conntrack_proto.c b/net/netfilter/nf_conntrack_proto.c
index 8595b5946acf..a49fc932629b 100644
--- a/net/netfilter/nf_conntrack_proto.c
+++ b/net/netfilter/nf_conntrack_proto.c
@@ -146,18 +146,15 @@ EXPORT_SYMBOL_GPL(nf_ct_l3proto_module_put);
 
 static int kill_l3proto(struct nf_conn *i, void *data)
 {
-	return (i->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num ==
-			((struct nf_conntrack_l3proto *)data)->l3proto);
+	return nf_ct_l3num(i) == ((struct nf_conntrack_l3proto *)data)->l3proto;
 }
 
 static int kill_l4proto(struct nf_conn *i, void *data)
 {
 	struct nf_conntrack_l4proto *l4proto;
 	l4proto = (struct nf_conntrack_l4proto *)data;
-	return (i->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum ==
-			l4proto->l4proto) &&
-	       (i->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num ==
-			l4proto->l3proto);
+	return nf_ct_protonum(i) == l4proto->l4proto &&
+	       nf_ct_l3num(i) == l4proto->l3proto;
 }
 
 static int nf_ct_l3proto_register_sysctl(struct nf_conntrack_l3proto *l3proto)
diff --git a/net/netfilter/nf_conntrack_proto_dccp.c b/net/netfilter/nf_conntrack_proto_dccp.c
new file mode 100644
index 000000000000..afb4a1861d2c
--- /dev/null
+++ b/net/netfilter/nf_conntrack_proto_dccp.c
@@ -0,0 +1,815 @@
+/*
+ * DCCP connection tracking protocol helper
+ *
+ * Copyright (c) 2005, 2006, 2008 Patrick McHardy <kaber@trash.net>
+ *
+ * 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.
+ *
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/sysctl.h>
+#include <linux/spinlock.h>
+#include <linux/skbuff.h>
+#include <linux/dccp.h>
+
+#include <linux/netfilter/nfnetlink_conntrack.h>
+#include <net/netfilter/nf_conntrack.h>
+#include <net/netfilter/nf_conntrack_l4proto.h>
+#include <net/netfilter/nf_log.h>
+
+static DEFINE_RWLOCK(dccp_lock);
+
+static int nf_ct_dccp_loose __read_mostly = 1;
+
+/* Timeouts are based on values from RFC4340:
+ *
+ * - REQUEST:
+ *
+ *   8.1.2. Client Request
+ *
+ *   A client MAY give up on its DCCP-Requests after some time
+ *   (3 minutes, for example).
+ *
+ * - RESPOND:
+ *
+ *   8.1.3. Server Response
+ *
+ *   It MAY also leave the RESPOND state for CLOSED after a timeout of
+ *   not less than 4MSL (8 minutes);
+ *
+ * - PARTOPEN:
+ *
+ *   8.1.5. Handshake Completion
+ *
+ *   If the client remains in PARTOPEN for more than 4MSL (8 minutes),
+ *   it SHOULD reset the connection with Reset Code 2, "Aborted".
+ *
+ * - OPEN:
+ *
+ *   The DCCP timestamp overflows after 11.9 hours. If the connection
+ *   stays idle this long the sequence number won't be recognized
+ *   as valid anymore.
+ *
+ * - CLOSEREQ/CLOSING:
+ *
+ *   8.3. Termination
+ *
+ *   The retransmission timer should initially be set to go off in two
+ *   round-trip times and should back off to not less than once every
+ *   64 seconds ...
+ *
+ * - TIMEWAIT:
+ *
+ *   4.3. States
+ *
+ *   A server or client socket remains in this state for 2MSL (4 minutes)
+ *   after the connection has been town down, ...
+ */
+
+#define DCCP_MSL (2 * 60 * HZ)
+
+static unsigned int dccp_timeout[CT_DCCP_MAX + 1] __read_mostly = {
+	[CT_DCCP_REQUEST]	= 2 * DCCP_MSL,
+	[CT_DCCP_RESPOND]	= 4 * DCCP_MSL,
+	[CT_DCCP_PARTOPEN]	= 4 * DCCP_MSL,
+	[CT_DCCP_OPEN]		= 12 * 3600 * HZ,
+	[CT_DCCP_CLOSEREQ]	= 64 * HZ,
+	[CT_DCCP_CLOSING]	= 64 * HZ,
+	[CT_DCCP_TIMEWAIT]	= 2 * DCCP_MSL,
+};
+
+static const char * const dccp_state_names[] = {
+	[CT_DCCP_NONE]		= "NONE",
+	[CT_DCCP_REQUEST]	= "REQUEST",
+	[CT_DCCP_RESPOND]	= "RESPOND",
+	[CT_DCCP_PARTOPEN]	= "PARTOPEN",
+	[CT_DCCP_OPEN]		= "OPEN",
+	[CT_DCCP_CLOSEREQ]	= "CLOSEREQ",
+	[CT_DCCP_CLOSING]	= "CLOSING",
+	[CT_DCCP_TIMEWAIT]	= "TIMEWAIT",
+	[CT_DCCP_IGNORE]	= "IGNORE",
+	[CT_DCCP_INVALID]	= "INVALID",
+};
+
+#define sNO	CT_DCCP_NONE
+#define sRQ	CT_DCCP_REQUEST
+#define sRS	CT_DCCP_RESPOND
+#define sPO	CT_DCCP_PARTOPEN
+#define sOP	CT_DCCP_OPEN
+#define sCR	CT_DCCP_CLOSEREQ
+#define sCG	CT_DCCP_CLOSING
+#define sTW	CT_DCCP_TIMEWAIT
+#define sIG	CT_DCCP_IGNORE
+#define sIV	CT_DCCP_INVALID
+
+/*
+ * DCCP state transistion table
+ *
+ * The assumption is the same as for TCP tracking:
+ *
+ * We are the man in the middle. All the packets go through us but might
+ * get lost in transit to the destination. It is assumed that the destination
+ * can't receive segments we haven't seen.
+ *
+ * The following states exist:
+ *
+ * NONE:	Initial state, expecting Request
+ * REQUEST:	Request seen, waiting for Response from server
+ * RESPOND:	Response from server seen, waiting for Ack from client
+ * PARTOPEN:	Ack after Response seen, waiting for packet other than Response,
+ * 		Reset or Sync from server
+ * OPEN:	Packet other than Response, Reset or Sync seen
+ * CLOSEREQ:	CloseReq from server seen, expecting Close from client
+ * CLOSING:	Close seen, expecting Reset
+ * TIMEWAIT:	Reset seen
+ * IGNORE:	Not determinable whether packet is valid
+ *
+ * Some states exist only on one side of the connection: REQUEST, RESPOND,
+ * PARTOPEN, CLOSEREQ. For the other side these states are equivalent to
+ * the one it was in before.
+ *
+ * Packets are marked as ignored (sIG) if we don't know if they're valid
+ * (for example a reincarnation of a connection we didn't notice is dead
+ * already) and the server may send back a connection closing Reset or a
+ * Response. They're also used for Sync/SyncAck packets, which we don't
+ * care about.
+ */
+static const u_int8_t
+dccp_state_table[CT_DCCP_ROLE_MAX + 1][DCCP_PKT_SYNCACK + 1][CT_DCCP_MAX + 1] = {
+	[CT_DCCP_ROLE_CLIENT] = {
+		[DCCP_PKT_REQUEST] = {
+		/*
+		 * sNO -> sRQ		Regular Request
+		 * sRQ -> sRQ		Retransmitted Request or reincarnation
+		 * sRS -> sRS		Retransmitted Request (apparently Response
+		 * 			got lost after we saw it) or reincarnation
+		 * sPO -> sIG		Ignore, conntrack might be out of sync
+		 * sOP -> sIG		Ignore, conntrack might be out of sync
+		 * sCR -> sIG		Ignore, conntrack might be out of sync
+		 * sCG -> sIG		Ignore, conntrack might be out of sync
+		 * sTW -> sRQ		Reincarnation
+		 *
+		 *	sNO, sRQ, sRS, sPO. sOP, sCR, sCG, sTW, */
+			sRQ, sRQ, sRS, sIG, sIG, sIG, sIG, sRQ,
+		},
+		[DCCP_PKT_RESPONSE] = {
+		/*
+		 * sNO -> sIV		Invalid
+		 * sRQ -> sIG		Ignore, might be response to ignored Request
+		 * sRS -> sIG		Ignore, might be response to ignored Request
+		 * sPO -> sIG		Ignore, might be response to ignored Request
+		 * sOP -> sIG		Ignore, might be response to ignored Request
+		 * sCR -> sIG		Ignore, might be response to ignored Request
+		 * sCG -> sIG		Ignore, might be response to ignored Request
+		 * sTW -> sIV		Invalid, reincarnation in reverse direction
+		 *			goes through sRQ
+		 *
+		 *	sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */
+			sIV, sIG, sIG, sIG, sIG, sIG, sIG, sIV,
+		},
+		[DCCP_PKT_ACK] = {
+		/*
+		 * sNO -> sIV		No connection
+		 * sRQ -> sIV		No connection
+		 * sRS -> sPO		Ack for Response, move to PARTOPEN (8.1.5.)
+		 * sPO -> sPO		Retransmitted Ack for Response, remain in PARTOPEN
+		 * sOP -> sOP		Regular ACK, remain in OPEN
+		 * sCR -> sCR		Ack in CLOSEREQ MAY be processed (8.3.)
+		 * sCG -> sCG		Ack in CLOSING MAY be processed (8.3.)
+		 * sTW -> sIV
+		 *
+		 *	sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */
+			sIV, sIV, sPO, sPO, sOP, sCR, sCG, sIV
+		},
+		[DCCP_PKT_DATA] = {
+		/*
+		 * sNO -> sIV		No connection
+		 * sRQ -> sIV		No connection
+		 * sRS -> sIV		No connection
+		 * sPO -> sIV		MUST use DataAck in PARTOPEN state (8.1.5.)
+		 * sOP -> sOP		Regular Data packet
+		 * sCR -> sCR		Data in CLOSEREQ MAY be processed (8.3.)
+		 * sCG -> sCG		Data in CLOSING MAY be processed (8.3.)
+		 * sTW -> sIV
+		 *
+		 *	sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */
+			sIV, sIV, sIV, sIV, sOP, sCR, sCG, sIV,
+		},
+		[DCCP_PKT_DATAACK] = {
+		/*
+		 * sNO -> sIV		No connection
+		 * sRQ -> sIV		No connection
+		 * sRS -> sPO		Ack for Response, move to PARTOPEN (8.1.5.)
+		 * sPO -> sPO		Remain in PARTOPEN state
+		 * sOP -> sOP		Regular DataAck packet in OPEN state
+		 * sCR -> sCR		DataAck in CLOSEREQ MAY be processed (8.3.)
+		 * sCG -> sCG		DataAck in CLOSING MAY be processed (8.3.)
+		 * sTW -> sIV
+		 *
+		 *	sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */
+			sIV, sIV, sPO, sPO, sOP, sCR, sCG, sIV
+		},
+		[DCCP_PKT_CLOSEREQ] = {
+		/*
+		 * CLOSEREQ may only be sent by the server.
+		 *
+		 *	sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */
+			sIV, sIV, sIV, sIV, sIV, sIV, sIV, sIV
+		},
+		[DCCP_PKT_CLOSE] = {
+		/*
+		 * sNO -> sIV		No connection
+		 * sRQ -> sIV		No connection
+		 * sRS -> sIV		No connection
+		 * sPO -> sCG		Client-initiated close
+		 * sOP -> sCG		Client-initiated close
+		 * sCR -> sCG		Close in response to CloseReq (8.3.)
+		 * sCG -> sCG		Retransmit
+		 * sTW -> sIV		Late retransmit, already in TIME_WAIT
+		 *
+		 *	sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */
+			sIV, sIV, sIV, sCG, sCG, sCG, sIV, sIV
+		},
+		[DCCP_PKT_RESET] = {
+		/*
+		 * sNO -> sIV		No connection
+		 * sRQ -> sTW		Sync received or timeout, SHOULD send Reset (8.1.1.)
+		 * sRS -> sTW		Response received without Request
+		 * sPO -> sTW		Timeout, SHOULD send Reset (8.1.5.)
+		 * sOP -> sTW		Connection reset
+		 * sCR -> sTW		Connection reset
+		 * sCG -> sTW		Connection reset
+		 * sTW -> sIG		Ignore (don't refresh timer)
+		 *
+		 *	sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */
+			sIV, sTW, sTW, sTW, sTW, sTW, sTW, sIG
+		},
+		[DCCP_PKT_SYNC] = {
+		/*
+		 * We currently ignore Sync packets
+		 *
+		 *	sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */
+			sIG, sIG, sIG, sIG, sIG, sIG, sIG, sIG,
+		},
+		[DCCP_PKT_SYNCACK] = {
+		/*
+		 * We currently ignore SyncAck packets
+		 *
+		 *	sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */
+			sIG, sIG, sIG, sIG, sIG, sIG, sIG, sIG,
+		},
+	},
+	[CT_DCCP_ROLE_SERVER] = {
+		[DCCP_PKT_REQUEST] = {
+		/*
+		 * sNO -> sIV		Invalid
+		 * sRQ -> sIG		Ignore, conntrack might be out of sync
+		 * sRS -> sIG		Ignore, conntrack might be out of sync
+		 * sPO -> sIG		Ignore, conntrack might be out of sync
+		 * sOP -> sIG		Ignore, conntrack might be out of sync
+		 * sCR -> sIG		Ignore, conntrack might be out of sync
+		 * sCG -> sIG		Ignore, conntrack might be out of sync
+		 * sTW -> sRQ		Reincarnation, must reverse roles
+		 *
+		 *	sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */
+			sIV, sIG, sIG, sIG, sIG, sIG, sIG, sRQ
+		},
+		[DCCP_PKT_RESPONSE] = {
+		/*
+		 * sNO -> sIV		Response without Request
+		 * sRQ -> sRS		Response to clients Request
+		 * sRS -> sRS		Retransmitted Response (8.1.3. SHOULD NOT)
+		 * sPO -> sIG		Response to an ignored Request or late retransmit
+		 * sOP -> sIG		Ignore, might be response to ignored Request
+		 * sCR -> sIG		Ignore, might be response to ignored Request
+		 * sCG -> sIG		Ignore, might be response to ignored Request
+		 * sTW -> sIV		Invalid, Request from client in sTW moves to sRQ
+		 *
+		 *	sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */
+			sIV, sRS, sRS, sIG, sIG, sIG, sIG, sIV
+		},
+		[DCCP_PKT_ACK] = {
+		/*
+		 * sNO -> sIV		No connection
+		 * sRQ -> sIV		No connection
+		 * sRS -> sIV		No connection
+		 * sPO -> sOP		Enter OPEN state (8.1.5.)
+		 * sOP -> sOP		Regular Ack in OPEN state
+		 * sCR -> sIV		Waiting for Close from client
+		 * sCG -> sCG		Ack in CLOSING MAY be processed (8.3.)
+		 * sTW -> sIV
+		 *
+		 *	sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */
+			sIV, sIV, sIV, sOP, sOP, sIV, sCG, sIV
+		},
+		[DCCP_PKT_DATA] = {
+		/*
+		 * sNO -> sIV		No connection
+		 * sRQ -> sIV		No connection
+		 * sRS -> sIV		No connection
+		 * sPO -> sOP		Enter OPEN state (8.1.5.)
+		 * sOP -> sOP		Regular Data packet in OPEN state
+		 * sCR -> sIV		Waiting for Close from client
+		 * sCG -> sCG		Data in CLOSING MAY be processed (8.3.)
+		 * sTW -> sIV
+		 *
+		 *	sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */
+			sIV, sIV, sIV, sOP, sOP, sIV, sCG, sIV
+		},
+		[DCCP_PKT_DATAACK] = {
+		/*
+		 * sNO -> sIV		No connection
+		 * sRQ -> sIV		No connection
+		 * sRS -> sIV		No connection
+		 * sPO -> sOP		Enter OPEN state (8.1.5.)
+		 * sOP -> sOP		Regular DataAck in OPEN state
+		 * sCR -> sIV		Waiting for Close from client
+		 * sCG -> sCG		Data in CLOSING MAY be processed (8.3.)
+		 * sTW -> sIV
+		 *
+		 *	sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */
+			sIV, sIV, sIV, sOP, sOP, sIV, sCG, sIV
+		},
+		[DCCP_PKT_CLOSEREQ] = {
+		/*
+		 * sNO -> sIV		No connection
+		 * sRQ -> sIV		No connection
+		 * sRS -> sIV		No connection
+		 * sPO -> sOP -> sCR	Move directly to CLOSEREQ (8.1.5.)
+		 * sOP -> sCR		CloseReq in OPEN state
+		 * sCR -> sCR		Retransmit
+		 * sCG -> sCR		Simultaneous close, client sends another Close
+		 * sTW -> sIV		Already closed
+		 *
+		 *	sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */
+			sIV, sIV, sIV, sCR, sCR, sCR, sCR, sIV
+		},
+		[DCCP_PKT_CLOSE] = {
+		/*
+		 * sNO -> sIV		No connection
+		 * sRQ -> sIV		No connection
+		 * sRS -> sIV		No connection
+		 * sPO -> sOP -> sCG	Move direcly to CLOSING
+		 * sOP -> sCG		Move to CLOSING
+		 * sCR -> sIV		Close after CloseReq is invalid
+		 * sCG -> sCG		Retransmit
+		 * sTW -> sIV		Already closed
+		 *
+		 *	sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */
+			sIV, sIV, sIV, sCG, sCG, sIV, sCG, sIV
+		},
+		[DCCP_PKT_RESET] = {
+		/*
+		 * sNO -> sIV		No connection
+		 * sRQ -> sTW		Reset in response to Request
+		 * sRS -> sTW		Timeout, SHOULD send Reset (8.1.3.)
+		 * sPO -> sTW		Timeout, SHOULD send Reset (8.1.3.)
+		 * sOP -> sTW
+		 * sCR -> sTW
+		 * sCG -> sTW
+		 * sTW -> sIG		Ignore (don't refresh timer)
+		 *
+		 *	sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW, sTW */
+			sIV, sTW, sTW, sTW, sTW, sTW, sTW, sTW, sIG
+		},
+		[DCCP_PKT_SYNC] = {
+		/*
+		 * We currently ignore Sync packets
+		 *
+		 *	sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */
+			sIG, sIG, sIG, sIG, sIG, sIG, sIG, sIG,
+		},
+		[DCCP_PKT_SYNCACK] = {
+		/*
+		 * We currently ignore SyncAck packets
+		 *
+		 *	sNO, sRQ, sRS, sPO, sOP, sCR, sCG, sTW */
+			sIG, sIG, sIG, sIG, sIG, sIG, sIG, sIG,
+		},
+	},
+};
+
+static bool dccp_pkt_to_tuple(const struct sk_buff *skb, unsigned int dataoff,
+			      struct nf_conntrack_tuple *tuple)
+{
+	struct dccp_hdr _hdr, *dh;
+
+	dh = skb_header_pointer(skb, dataoff, sizeof(_hdr), &_hdr);
+	if (dh == NULL)
+		return false;
+
+	tuple->src.u.dccp.port = dh->dccph_sport;
+	tuple->dst.u.dccp.port = dh->dccph_dport;
+	return true;
+}
+
+static bool dccp_invert_tuple(struct nf_conntrack_tuple *inv,
+			      const struct nf_conntrack_tuple *tuple)
+{
+	inv->src.u.dccp.port = tuple->dst.u.dccp.port;
+	inv->dst.u.dccp.port = tuple->src.u.dccp.port;
+	return true;
+}
+
+static bool dccp_new(struct nf_conn *ct, const struct sk_buff *skb,
+		     unsigned int dataoff)
+{
+	struct dccp_hdr _dh, *dh;
+	const char *msg;
+	u_int8_t state;
+
+	dh = skb_header_pointer(skb, dataoff, sizeof(_dh), &dh);
+	BUG_ON(dh == NULL);
+
+	state = dccp_state_table[CT_DCCP_ROLE_CLIENT][dh->dccph_type][CT_DCCP_NONE];
+	switch (state) {
+	default:
+		if (nf_ct_dccp_loose == 0) {
+			msg = "nf_ct_dccp: not picking up existing connection ";
+			goto out_invalid;
+		}
+	case CT_DCCP_REQUEST:
+		break;
+	case CT_DCCP_INVALID:
+		msg = "nf_ct_dccp: invalid state transition ";
+		goto out_invalid;
+	}
+
+	ct->proto.dccp.role[IP_CT_DIR_ORIGINAL] = CT_DCCP_ROLE_CLIENT;
+	ct->proto.dccp.role[IP_CT_DIR_REPLY] = CT_DCCP_ROLE_SERVER;
+	ct->proto.dccp.state = CT_DCCP_NONE;
+	return true;
+
+out_invalid:
+	if (LOG_INVALID(IPPROTO_DCCP))
+		nf_log_packet(nf_ct_l3num(ct), 0, skb, NULL, NULL, NULL, msg);
+	return false;
+}
+
+static u64 dccp_ack_seq(const struct dccp_hdr *dh)
+{
+	const struct dccp_hdr_ack_bits *dhack;
+
+	dhack = (void *)dh + __dccp_basic_hdr_len(dh);
+	return ((u64)ntohs(dhack->dccph_ack_nr_high) << 32) +
+		     ntohl(dhack->dccph_ack_nr_low);
+}
+
+static int dccp_packet(struct nf_conn *ct, const struct sk_buff *skb,
+		       unsigned int dataoff, enum ip_conntrack_info ctinfo,
+		       int pf, unsigned int hooknum)
+{
+	enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
+	struct dccp_hdr _dh, *dh;
+	u_int8_t type, old_state, new_state;
+	enum ct_dccp_roles role;
+
+	dh = skb_header_pointer(skb, dataoff, sizeof(_dh), &dh);
+	BUG_ON(dh == NULL);
+	type = dh->dccph_type;
+
+	if (type == DCCP_PKT_RESET &&
+	    !test_bit(IPS_SEEN_REPLY_BIT, &ct->status)) {
+		/* Tear down connection immediately if only reply is a RESET */
+		if (del_timer(&ct->timeout))
+			ct->timeout.function((unsigned long)ct);
+		return NF_ACCEPT;
+	}
+
+	write_lock_bh(&dccp_lock);
+
+	role = ct->proto.dccp.role[dir];
+	old_state = ct->proto.dccp.state;
+	new_state = dccp_state_table[role][type][old_state];
+
+	switch (new_state) {
+	case CT_DCCP_REQUEST:
+		if (old_state == CT_DCCP_TIMEWAIT &&
+		    role == CT_DCCP_ROLE_SERVER) {
+			/* Reincarnation in the reverse direction: reopen and
+			 * reverse client/server roles. */
+			ct->proto.dccp.role[dir] = CT_DCCP_ROLE_CLIENT;
+			ct->proto.dccp.role[!dir] = CT_DCCP_ROLE_SERVER;
+		}
+		break;
+	case CT_DCCP_RESPOND:
+		if (old_state == CT_DCCP_REQUEST)
+			ct->proto.dccp.handshake_seq = dccp_hdr_seq(dh);
+		break;
+	case CT_DCCP_PARTOPEN:
+		if (old_state == CT_DCCP_RESPOND &&
+		    type == DCCP_PKT_ACK &&
+		    dccp_ack_seq(dh) == ct->proto.dccp.handshake_seq)
+			set_bit(IPS_ASSURED_BIT, &ct->status);
+		break;
+	case CT_DCCP_IGNORE:
+		/*
+		 * Connection tracking might be out of sync, so we ignore
+		 * packets that might establish a new connection and resync
+		 * if the server responds with a valid Response.
+		 */
+		if (ct->proto.dccp.last_dir == !dir &&
+		    ct->proto.dccp.last_pkt == DCCP_PKT_REQUEST &&
+		    type == DCCP_PKT_RESPONSE) {
+			ct->proto.dccp.role[!dir] = CT_DCCP_ROLE_CLIENT;
+			ct->proto.dccp.role[dir] = CT_DCCP_ROLE_SERVER;
+			ct->proto.dccp.handshake_seq = dccp_hdr_seq(dh);
+			new_state = CT_DCCP_RESPOND;
+			break;
+		}
+		ct->proto.dccp.last_dir = dir;
+		ct->proto.dccp.last_pkt = type;
+
+		write_unlock_bh(&dccp_lock);
+		if (LOG_INVALID(IPPROTO_DCCP))
+			nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
+				      "nf_ct_dccp: invalid packet ignored ");
+		return NF_ACCEPT;
+	case CT_DCCP_INVALID:
+		write_unlock_bh(&dccp_lock);
+		if (LOG_INVALID(IPPROTO_DCCP))
+			nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
+				      "nf_ct_dccp: invalid state transition ");
+		return -NF_ACCEPT;
+	}
+
+	ct->proto.dccp.last_dir = dir;
+	ct->proto.dccp.last_pkt = type;
+	ct->proto.dccp.state = new_state;
+	write_unlock_bh(&dccp_lock);
+	nf_ct_refresh_acct(ct, ctinfo, skb, dccp_timeout[new_state]);
+
+	return NF_ACCEPT;
+}
+
+static int dccp_error(struct sk_buff *skb, unsigned int dataoff,
+		      enum ip_conntrack_info *ctinfo, int pf,
+		      unsigned int hooknum)
+{
+	struct dccp_hdr _dh, *dh;
+	unsigned int dccp_len = skb->len - dataoff;
+	unsigned int cscov;
+	const char *msg;
+
+	dh = skb_header_pointer(skb, dataoff, sizeof(_dh), &dh);
+	if (dh == NULL) {
+		msg = "nf_ct_dccp: short packet ";
+		goto out_invalid;
+	}
+
+	if (dh->dccph_doff * 4 < sizeof(struct dccp_hdr) ||
+	    dh->dccph_doff * 4 > dccp_len) {
+		msg = "nf_ct_dccp: truncated/malformed packet ";
+		goto out_invalid;
+	}
+
+	cscov = dccp_len;
+	if (dh->dccph_cscov) {
+		cscov = (dh->dccph_cscov - 1) * 4;
+		if (cscov > dccp_len) {
+			msg = "nf_ct_dccp: bad checksum coverage ";
+			goto out_invalid;
+		}
+	}
+
+	if (nf_conntrack_checksum && hooknum == NF_INET_PRE_ROUTING &&
+	    nf_checksum_partial(skb, hooknum, dataoff, cscov, IPPROTO_DCCP,
+				pf)) {
+		msg = "nf_ct_dccp: bad checksum ";
+		goto out_invalid;
+	}
+
+	if (dh->dccph_type >= DCCP_PKT_INVALID) {
+		msg = "nf_ct_dccp: reserved packet type ";
+		goto out_invalid;
+	}
+
+	return NF_ACCEPT;
+
+out_invalid:
+	if (LOG_INVALID(IPPROTO_DCCP))
+		nf_log_packet(pf, 0, skb, NULL, NULL, NULL, msg);
+	return -NF_ACCEPT;
+}
+
+static int dccp_print_tuple(struct seq_file *s,
+			    const struct nf_conntrack_tuple *tuple)
+{
+	return seq_printf(s, "sport=%hu dport=%hu ",
+			  ntohs(tuple->src.u.dccp.port),
+			  ntohs(tuple->dst.u.dccp.port));
+}
+
+static int dccp_print_conntrack(struct seq_file *s, const struct nf_conn *ct)
+{
+	return seq_printf(s, "%s ", dccp_state_names[ct->proto.dccp.state]);
+}
+
+#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
+static int dccp_to_nlattr(struct sk_buff *skb, struct nlattr *nla,
+			  const struct nf_conn *ct)
+{
+	struct nlattr *nest_parms;
+
+	read_lock_bh(&dccp_lock);
+	nest_parms = nla_nest_start(skb, CTA_PROTOINFO_DCCP | NLA_F_NESTED);
+	if (!nest_parms)
+		goto nla_put_failure;
+	NLA_PUT_U8(skb, CTA_PROTOINFO_DCCP_STATE, ct->proto.dccp.state);
+	nla_nest_end(skb, nest_parms);
+	read_unlock_bh(&dccp_lock);
+	return 0;
+
+nla_put_failure:
+	read_unlock_bh(&dccp_lock);
+	return -1;
+}
+
+static const struct nla_policy dccp_nla_policy[CTA_PROTOINFO_DCCP_MAX + 1] = {
+	[CTA_PROTOINFO_DCCP_STATE]	= { .type = NLA_U8 },
+};
+
+static int nlattr_to_dccp(struct nlattr *cda[], struct nf_conn *ct)
+{
+	struct nlattr *attr = cda[CTA_PROTOINFO_DCCP];
+	struct nlattr *tb[CTA_PROTOINFO_DCCP_MAX + 1];
+	int err;
+
+	if (!attr)
+		return 0;
+
+	err = nla_parse_nested(tb, CTA_PROTOINFO_DCCP_MAX, attr,
+			       dccp_nla_policy);
+	if (err < 0)
+		return err;
+
+	if (!tb[CTA_PROTOINFO_DCCP_STATE] ||
+	    nla_get_u8(tb[CTA_PROTOINFO_DCCP_STATE]) >= CT_DCCP_IGNORE)
+		return -EINVAL;
+
+	write_lock_bh(&dccp_lock);
+	ct->proto.dccp.state = nla_get_u8(tb[CTA_PROTOINFO_DCCP_STATE]);
+	write_unlock_bh(&dccp_lock);
+	return 0;
+}
+#endif
+
+#ifdef CONFIG_SYSCTL
+static unsigned int dccp_sysctl_table_users;
+static struct ctl_table_header *dccp_sysctl_header;
+static ctl_table dccp_sysctl_table[] = {
+	{
+		.ctl_name	= CTL_UNNUMBERED,
+		.procname	= "nf_conntrack_dccp_timeout_request",
+		.data		= &dccp_timeout[CT_DCCP_REQUEST],
+		.maxlen		= sizeof(unsigned int),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec_jiffies,
+	},
+	{
+		.ctl_name	= CTL_UNNUMBERED,
+		.procname	= "nf_conntrack_dccp_timeout_respond",
+		.data		= &dccp_timeout[CT_DCCP_RESPOND],
+		.maxlen		= sizeof(unsigned int),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec_jiffies,
+	},
+	{
+		.ctl_name	= CTL_UNNUMBERED,
+		.procname	= "nf_conntrack_dccp_timeout_partopen",
+		.data		= &dccp_timeout[CT_DCCP_PARTOPEN],
+		.maxlen		= sizeof(unsigned int),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec_jiffies,
+	},
+	{
+		.ctl_name	= CTL_UNNUMBERED,
+		.procname	= "nf_conntrack_dccp_timeout_open",
+		.data		= &dccp_timeout[CT_DCCP_OPEN],
+		.maxlen		= sizeof(unsigned int),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec_jiffies,
+	},
+	{
+		.ctl_name	= CTL_UNNUMBERED,
+		.procname	= "nf_conntrack_dccp_timeout_closereq",
+		.data		= &dccp_timeout[CT_DCCP_CLOSEREQ],
+		.maxlen		= sizeof(unsigned int),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec_jiffies,
+	},
+	{
+		.ctl_name	= CTL_UNNUMBERED,
+		.procname	= "nf_conntrack_dccp_timeout_closing",
+		.data		= &dccp_timeout[CT_DCCP_CLOSING],
+		.maxlen		= sizeof(unsigned int),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec_jiffies,
+	},
+	{
+		.ctl_name	= CTL_UNNUMBERED,
+		.procname	= "nf_conntrack_dccp_timeout_timewait",
+		.data		= &dccp_timeout[CT_DCCP_TIMEWAIT],
+		.maxlen		= sizeof(unsigned int),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec_jiffies,
+	},
+	{
+		.ctl_name	= CTL_UNNUMBERED,
+		.procname	= "nf_conntrack_dccp_loose",
+		.data		= &nf_ct_dccp_loose,
+		.maxlen		= sizeof(nf_ct_dccp_loose),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec,
+	},
+	{
+		.ctl_name	= 0,
+	}
+};
+#endif /* CONFIG_SYSCTL */
+
+static struct nf_conntrack_l4proto dccp_proto4 __read_mostly = {
+	.l3proto		= AF_INET,
+	.l4proto		= IPPROTO_DCCP,
+	.name			= "dccp",
+	.pkt_to_tuple		= dccp_pkt_to_tuple,
+	.invert_tuple		= dccp_invert_tuple,
+	.new			= dccp_new,
+	.packet			= dccp_packet,
+	.error			= dccp_error,
+	.print_tuple		= dccp_print_tuple,
+	.print_conntrack	= dccp_print_conntrack,
+#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
+	.to_nlattr		= dccp_to_nlattr,
+	.from_nlattr		= nlattr_to_dccp,
+	.tuple_to_nlattr	= nf_ct_port_tuple_to_nlattr,
+	.nlattr_to_tuple	= nf_ct_port_nlattr_to_tuple,
+	.nla_policy		= nf_ct_port_nla_policy,
+#endif
+#ifdef CONFIG_SYSCTL
+	.ctl_table_users	= &dccp_sysctl_table_users,
+	.ctl_table_header	= &dccp_sysctl_header,
+	.ctl_table		= dccp_sysctl_table,
+#endif
+};
+
+static struct nf_conntrack_l4proto dccp_proto6 __read_mostly = {
+	.l3proto		= AF_INET6,
+	.l4proto		= IPPROTO_DCCP,
+	.name			= "dccp",
+	.pkt_to_tuple		= dccp_pkt_to_tuple,
+	.invert_tuple		= dccp_invert_tuple,
+	.new			= dccp_new,
+	.packet			= dccp_packet,
+	.error			= dccp_error,
+	.print_tuple		= dccp_print_tuple,
+	.print_conntrack	= dccp_print_conntrack,
+#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
+	.to_nlattr		= dccp_to_nlattr,
+	.from_nlattr		= nlattr_to_dccp,
+	.tuple_to_nlattr	= nf_ct_port_tuple_to_nlattr,
+	.nlattr_to_tuple	= nf_ct_port_nlattr_to_tuple,
+	.nla_policy		= nf_ct_port_nla_policy,
+#endif
+#ifdef CONFIG_SYSCTL
+	.ctl_table_users	= &dccp_sysctl_table_users,
+	.ctl_table_header	= &dccp_sysctl_header,
+	.ctl_table		= dccp_sysctl_table,
+#endif
+};
+
+static int __init nf_conntrack_proto_dccp_init(void)
+{
+	int err;
+
+	err = nf_conntrack_l4proto_register(&dccp_proto4);
+	if (err < 0)
+		goto err1;
+
+	err = nf_conntrack_l4proto_register(&dccp_proto6);
+	if (err < 0)
+		goto err2;
+	return 0;
+
+err2:
+	nf_conntrack_l4proto_unregister(&dccp_proto4);
+err1:
+	return err;
+}
+
+static void __exit nf_conntrack_proto_dccp_fini(void)
+{
+	nf_conntrack_l4proto_unregister(&dccp_proto6);
+	nf_conntrack_l4proto_unregister(&dccp_proto4);
+}
+
+module_init(nf_conntrack_proto_dccp_init);
+module_exit(nf_conntrack_proto_dccp_fini);
+
+MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
+MODULE_DESCRIPTION("DCCP connection tracking protocol helper");
+MODULE_LICENSE("GPL");
diff --git a/net/netfilter/nf_conntrack_proto_generic.c b/net/netfilter/nf_conntrack_proto_generic.c
index 55458915575f..e31b0e7bd0b1 100644
--- a/net/netfilter/nf_conntrack_proto_generic.c
+++ b/net/netfilter/nf_conntrack_proto_generic.c
@@ -14,23 +14,23 @@
 
 static unsigned int nf_ct_generic_timeout __read_mostly = 600*HZ;
 
-static int generic_pkt_to_tuple(const struct sk_buff *skb,
-				unsigned int dataoff,
-				struct nf_conntrack_tuple *tuple)
+static bool generic_pkt_to_tuple(const struct sk_buff *skb,
+				 unsigned int dataoff,
+				 struct nf_conntrack_tuple *tuple)
 {
 	tuple->src.u.all = 0;
 	tuple->dst.u.all = 0;
 
-	return 1;
+	return true;
 }
 
-static int generic_invert_tuple(struct nf_conntrack_tuple *tuple,
-				const struct nf_conntrack_tuple *orig)
+static bool generic_invert_tuple(struct nf_conntrack_tuple *tuple,
+				 const struct nf_conntrack_tuple *orig)
 {
 	tuple->src.u.all = 0;
 	tuple->dst.u.all = 0;
 
-	return 1;
+	return true;
 }
 
 /* Print out the per-protocol part of the tuple. */
@@ -53,10 +53,10 @@ static int packet(struct nf_conn *ct,
 }
 
 /* Called when a new connection for this protocol found. */
-static int new(struct nf_conn *ct, const struct sk_buff *skb,
-	       unsigned int dataoff)
+static bool new(struct nf_conn *ct, const struct sk_buff *skb,
+		unsigned int dataoff)
 {
-	return 1;
+	return true;
 }
 
 #ifdef CONFIG_SYSCTL
diff --git a/net/netfilter/nf_conntrack_proto_gre.c b/net/netfilter/nf_conntrack_proto_gre.c
index e10024a1b666..654a4f7f12c6 100644
--- a/net/netfilter/nf_conntrack_proto_gre.c
+++ b/net/netfilter/nf_conntrack_proto_gre.c
@@ -82,7 +82,7 @@ static __be16 gre_keymap_lookup(struct nf_conntrack_tuple *t)
 	read_unlock_bh(&nf_ct_gre_lock);
 
 	pr_debug("lookup src key 0x%x for ", key);
-	NF_CT_DUMP_TUPLE(t);
+	nf_ct_dump_tuple(t);
 
 	return key;
 }
@@ -113,7 +113,7 @@ int nf_ct_gre_keymap_add(struct nf_conn *ct, enum ip_conntrack_dir dir,
 	*kmp = km;
 
 	pr_debug("adding new entry %p: ", km);
-	NF_CT_DUMP_TUPLE(&km->tuple);
+	nf_ct_dump_tuple(&km->tuple);
 
 	write_lock_bh(&nf_ct_gre_lock);
 	list_add_tail(&km->list, &gre_keymap_list);
@@ -148,18 +148,17 @@ EXPORT_SYMBOL_GPL(nf_ct_gre_keymap_destroy);
 /* PUBLIC CONNTRACK PROTO HELPER FUNCTIONS */
 
 /* invert gre part of tuple */
-static int gre_invert_tuple(struct nf_conntrack_tuple *tuple,
-			    const struct nf_conntrack_tuple *orig)
+static bool gre_invert_tuple(struct nf_conntrack_tuple *tuple,
+			     const struct nf_conntrack_tuple *orig)
 {
 	tuple->dst.u.gre.key = orig->src.u.gre.key;
 	tuple->src.u.gre.key = orig->dst.u.gre.key;
-	return 1;
+	return true;
 }
 
 /* gre hdr info to tuple */
-static int gre_pkt_to_tuple(const struct sk_buff *skb,
-			   unsigned int dataoff,
-			   struct nf_conntrack_tuple *tuple)
+static bool gre_pkt_to_tuple(const struct sk_buff *skb, unsigned int dataoff,
+			     struct nf_conntrack_tuple *tuple)
 {
 	const struct gre_hdr_pptp *pgrehdr;
 	struct gre_hdr_pptp _pgrehdr;
@@ -173,24 +172,24 @@ static int gre_pkt_to_tuple(const struct sk_buff *skb,
 		/* try to behave like "nf_conntrack_proto_generic" */
 		tuple->src.u.all = 0;
 		tuple->dst.u.all = 0;
-		return 1;
+		return true;
 	}
 
 	/* PPTP header is variable length, only need up to the call_id field */
 	pgrehdr = skb_header_pointer(skb, dataoff, 8, &_pgrehdr);
 	if (!pgrehdr)
-		return 1;
+		return true;
 
 	if (ntohs(grehdr->protocol) != GRE_PROTOCOL_PPTP) {
 		pr_debug("GRE_VERSION_PPTP but unknown proto\n");
-		return 0;
+		return false;
 	}
 
 	tuple->dst.u.gre.key = pgrehdr->call_id;
 	srckey = gre_keymap_lookup(tuple);
 	tuple->src.u.gre.key = srckey;
 
-	return 1;
+	return true;
 }
 
 /* print gre part of tuple */
@@ -235,18 +234,18 @@ static int gre_packet(struct nf_conn *ct,
 }
 
 /* Called when a new connection for this protocol found. */
-static int gre_new(struct nf_conn *ct, const struct sk_buff *skb,
-		   unsigned int dataoff)
+static bool gre_new(struct nf_conn *ct, const struct sk_buff *skb,
+		    unsigned int dataoff)
 {
 	pr_debug(": ");
-	NF_CT_DUMP_TUPLE(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
+	nf_ct_dump_tuple(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
 
 	/* initialize to sane value.  Ideally a conntrack helper
 	 * (e.g. in case of pptp) is increasing them */
 	ct->proto.gre.stream_timeout = GRE_STREAM_TIMEOUT;
 	ct->proto.gre.timeout = GRE_TIMEOUT;
 
-	return 1;
+	return true;
 }
 
 /* Called when a conntrack entry has already been removed from the hashes
diff --git a/net/netfilter/nf_conntrack_proto_sctp.c b/net/netfilter/nf_conntrack_proto_sctp.c
index f9a08370dbb3..cbf2e27a22b2 100644
--- a/net/netfilter/nf_conntrack_proto_sctp.c
+++ b/net/netfilter/nf_conntrack_proto_sctp.c
@@ -33,7 +33,7 @@ static DEFINE_RWLOCK(sctp_lock);
 
    And so for me for SCTP :D -Kiran */
 
-static const char *sctp_conntrack_names[] = {
+static const char *const sctp_conntrack_names[] = {
 	"NONE",
 	"CLOSED",
 	"COOKIE_WAIT",
@@ -130,28 +130,28 @@ static const u8 sctp_conntracks[2][9][SCTP_CONNTRACK_MAX] = {
 	}
 };
 
-static int sctp_pkt_to_tuple(const struct sk_buff *skb,
-			     unsigned int dataoff,
-			     struct nf_conntrack_tuple *tuple)
+static bool sctp_pkt_to_tuple(const struct sk_buff *skb, unsigned int dataoff,
+			      struct nf_conntrack_tuple *tuple)
 {
-	sctp_sctphdr_t _hdr, *hp;
+	const struct sctphdr *hp;
+	struct sctphdr _hdr;
 
 	/* Actually only need first 8 bytes. */
 	hp = skb_header_pointer(skb, dataoff, 8, &_hdr);
 	if (hp == NULL)
-		return 0;
+		return false;
 
 	tuple->src.u.sctp.port = hp->source;
 	tuple->dst.u.sctp.port = hp->dest;
-	return 1;
+	return true;
 }
 
-static int sctp_invert_tuple(struct nf_conntrack_tuple *tuple,
-			     const struct nf_conntrack_tuple *orig)
+static bool sctp_invert_tuple(struct nf_conntrack_tuple *tuple,
+			      const struct nf_conntrack_tuple *orig)
 {
 	tuple->src.u.sctp.port = orig->dst.u.sctp.port;
 	tuple->dst.u.sctp.port = orig->src.u.sctp.port;
-	return 1;
+	return true;
 }
 
 /* Print out the per-protocol part of the tuple. */
@@ -292,8 +292,10 @@ static int sctp_packet(struct nf_conn *ct,
 {
 	enum sctp_conntrack new_state, old_state;
 	enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
-	sctp_sctphdr_t _sctph, *sh;
-	sctp_chunkhdr_t _sch, *sch;
+	const struct sctphdr *sh;
+	struct sctphdr _sctph;
+	const struct sctp_chunkhdr *sch;
+	struct sctp_chunkhdr _sch;
 	u_int32_t offset, count;
 	unsigned long map[256 / sizeof(unsigned long)] = { 0 };
 
@@ -390,27 +392,29 @@ out:
 }
 
 /* Called when a new connection for this protocol found. */
-static int sctp_new(struct nf_conn *ct, const struct sk_buff *skb,
-		    unsigned int dataoff)
+static bool sctp_new(struct nf_conn *ct, const struct sk_buff *skb,
+		     unsigned int dataoff)
 {
 	enum sctp_conntrack new_state;
-	sctp_sctphdr_t _sctph, *sh;
-	sctp_chunkhdr_t _sch, *sch;
+	const struct sctphdr *sh;
+	struct sctphdr _sctph;
+	const struct sctp_chunkhdr *sch;
+	struct sctp_chunkhdr _sch;
 	u_int32_t offset, count;
 	unsigned long map[256 / sizeof(unsigned long)] = { 0 };
 
 	sh = skb_header_pointer(skb, dataoff, sizeof(_sctph), &_sctph);
 	if (sh == NULL)
-		return 0;
+		return false;
 
 	if (do_basic_checks(ct, skb, dataoff, map) != 0)
-		return 0;
+		return false;
 
 	/* If an OOTB packet has any of these chunks discard (Sec 8.4) */
 	if (test_bit(SCTP_CID_ABORT, map) ||
 	    test_bit(SCTP_CID_SHUTDOWN_COMPLETE, map) ||
 	    test_bit(SCTP_CID_COOKIE_ACK, map))
-		return 0;
+		return false;
 
 	new_state = SCTP_CONNTRACK_MAX;
 	for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) {
@@ -422,7 +426,7 @@ static int sctp_new(struct nf_conn *ct, const struct sk_buff *skb,
 		if (new_state == SCTP_CONNTRACK_NONE ||
 		    new_state == SCTP_CONNTRACK_MAX) {
 			pr_debug("nf_conntrack_sctp: invalid new deleting.\n");
-			return 0;
+			return false;
 		}
 
 		/* Copy the vtag into the state info */
@@ -433,7 +437,7 @@ static int sctp_new(struct nf_conn *ct, const struct sk_buff *skb,
 				ih = skb_header_pointer(skb, offset + sizeof(sctp_chunkhdr_t),
 							sizeof(_inithdr), &_inithdr);
 				if (ih == NULL)
-					return 0;
+					return false;
 
 				pr_debug("Setting vtag %x for new conn\n",
 					 ih->init_tag);
@@ -442,7 +446,7 @@ static int sctp_new(struct nf_conn *ct, const struct sk_buff *skb,
 								ih->init_tag;
 			} else {
 				/* Sec 8.5.1 (A) */
-				return 0;
+				return false;
 			}
 		}
 		/* If it is a shutdown ack OOTB packet, we expect a return
@@ -456,7 +460,7 @@ static int sctp_new(struct nf_conn *ct, const struct sk_buff *skb,
 		ct->proto.sctp.state = new_state;
 	}
 
-	return 1;
+	return true;
 }
 
 #ifdef CONFIG_SYSCTL
diff --git a/net/netfilter/nf_conntrack_proto_tcp.c b/net/netfilter/nf_conntrack_proto_tcp.c
index 62567959b66e..ba94004fe323 100644
--- a/net/netfilter/nf_conntrack_proto_tcp.c
+++ b/net/netfilter/nf_conntrack_proto_tcp.c
@@ -257,9 +257,8 @@ static const u8 tcp_conntracks[2][6][TCP_CONNTRACK_MAX] = {
 	}
 };
 
-static int tcp_pkt_to_tuple(const struct sk_buff *skb,
-			    unsigned int dataoff,
-			    struct nf_conntrack_tuple *tuple)
+static bool tcp_pkt_to_tuple(const struct sk_buff *skb, unsigned int dataoff,
+			     struct nf_conntrack_tuple *tuple)
 {
 	const struct tcphdr *hp;
 	struct tcphdr _hdr;
@@ -267,20 +266,20 @@ static int tcp_pkt_to_tuple(const struct sk_buff *skb,
 	/* Actually only need first 8 bytes. */
 	hp = skb_header_pointer(skb, dataoff, 8, &_hdr);
 	if (hp == NULL)
-		return 0;
+		return false;
 
 	tuple->src.u.tcp.port = hp->source;
 	tuple->dst.u.tcp.port = hp->dest;
 
-	return 1;
+	return true;
 }
 
-static int tcp_invert_tuple(struct nf_conntrack_tuple *tuple,
-			    const struct nf_conntrack_tuple *orig)
+static bool tcp_invert_tuple(struct nf_conntrack_tuple *tuple,
+			     const struct nf_conntrack_tuple *orig)
 {
 	tuple->src.u.tcp.port = orig->dst.u.tcp.port;
 	tuple->dst.u.tcp.port = orig->src.u.tcp.port;
-	return 1;
+	return true;
 }
 
 /* Print out the per-protocol part of the tuple. */
@@ -478,20 +477,20 @@ static void tcp_sack(const struct sk_buff *skb, unsigned int dataoff,
 	}
 }
 
-static int tcp_in_window(const struct nf_conn *ct,
-			 struct ip_ct_tcp *state,
-			 enum ip_conntrack_dir dir,
-			 unsigned int index,
-			 const struct sk_buff *skb,
-			 unsigned int dataoff,
-			 const struct tcphdr *tcph,
-			 int pf)
+static bool tcp_in_window(const struct nf_conn *ct,
+			  struct ip_ct_tcp *state,
+			  enum ip_conntrack_dir dir,
+			  unsigned int index,
+			  const struct sk_buff *skb,
+			  unsigned int dataoff,
+			  const struct tcphdr *tcph,
+			  int pf)
 {
 	struct ip_ct_tcp_state *sender = &state->seen[dir];
 	struct ip_ct_tcp_state *receiver = &state->seen[!dir];
 	const struct nf_conntrack_tuple *tuple = &ct->tuplehash[dir].tuple;
 	__u32 seq, ack, sack, end, win, swin;
-	int res;
+	bool res;
 
 	/*
 	 * Get the required data from the packet.
@@ -506,7 +505,7 @@ static int tcp_in_window(const struct nf_conn *ct,
 
 	pr_debug("tcp_in_window: START\n");
 	pr_debug("tcp_in_window: ");
-	NF_CT_DUMP_TUPLE(tuple);
+	nf_ct_dump_tuple(tuple);
 	pr_debug("seq=%u ack=%u sack=%u win=%u end=%u\n",
 		 seq, ack, sack, win, end);
 	pr_debug("tcp_in_window: sender end=%u maxend=%u maxwin=%u scale=%i "
@@ -593,7 +592,7 @@ static int tcp_in_window(const struct nf_conn *ct,
 		seq = end = sender->td_end;
 
 	pr_debug("tcp_in_window: ");
-	NF_CT_DUMP_TUPLE(tuple);
+	nf_ct_dump_tuple(tuple);
 	pr_debug("seq=%u ack=%u sack =%u win=%u end=%u\n",
 		 seq, ack, sack, win, end);
 	pr_debug("tcp_in_window: sender end=%u maxend=%u maxwin=%u scale=%i "
@@ -657,12 +656,12 @@ static int tcp_in_window(const struct nf_conn *ct,
 				state->retrans = 0;
 			}
 		}
-		res = 1;
+		res = true;
 	} else {
-		res = 0;
+		res = false;
 		if (sender->flags & IP_CT_TCP_FLAG_BE_LIBERAL ||
 		    nf_ct_tcp_be_liberal)
-			res = 1;
+			res = true;
 		if (!res && LOG_INVALID(IPPROTO_TCP))
 			nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
 			"nf_ct_tcp: %s ",
@@ -676,7 +675,7 @@ static int tcp_in_window(const struct nf_conn *ct,
 			: "SEQ is over the upper bound (over the window of the receiver)");
 	}
 
-	pr_debug("tcp_in_window: res=%i sender end=%u maxend=%u maxwin=%u "
+	pr_debug("tcp_in_window: res=%u sender end=%u maxend=%u maxwin=%u "
 		 "receiver end=%u maxend=%u maxwin=%u\n",
 		 res, sender->td_end, sender->td_maxend, sender->td_maxwin,
 		 receiver->td_end, receiver->td_maxend, receiver->td_maxwin);
@@ -937,7 +936,7 @@ static int tcp_packet(struct nf_conn *ct,
 	ct->proto.tcp.last_dir = dir;
 
 	pr_debug("tcp_conntracks: ");
-	NF_CT_DUMP_TUPLE(tuple);
+	nf_ct_dump_tuple(tuple);
 	pr_debug("syn=%i ack=%i fin=%i rst=%i old=%i new=%i\n",
 		 (th->syn ? 1 : 0), (th->ack ? 1 : 0),
 		 (th->fin ? 1 : 0), (th->rst ? 1 : 0),
@@ -982,9 +981,8 @@ static int tcp_packet(struct nf_conn *ct,
 }
 
 /* Called when a new connection for this protocol found. */
-static int tcp_new(struct nf_conn *ct,
-		   const struct sk_buff *skb,
-		   unsigned int dataoff)
+static bool tcp_new(struct nf_conn *ct, const struct sk_buff *skb,
+		    unsigned int dataoff)
 {
 	enum tcp_conntrack new_state;
 	const struct tcphdr *th;
@@ -1003,7 +1001,7 @@ static int tcp_new(struct nf_conn *ct,
 	/* Invalid: delete conntrack */
 	if (new_state >= TCP_CONNTRACK_MAX) {
 		pr_debug("nf_ct_tcp: invalid new deleting.\n");
-		return 0;
+		return false;
 	}
 
 	if (new_state == TCP_CONNTRACK_SYN_SENT) {
@@ -1021,7 +1019,7 @@ static int tcp_new(struct nf_conn *ct,
 		ct->proto.tcp.seen[1].flags = 0;
 	} else if (nf_ct_tcp_loose == 0) {
 		/* Don't try to pick up connections. */
-		return 0;
+		return false;
 	} else {
 		/*
 		 * We are in the middle of a connection,
@@ -1061,7 +1059,7 @@ static int tcp_new(struct nf_conn *ct,
 		 sender->td_scale,
 		 receiver->td_end, receiver->td_maxend, receiver->td_maxwin,
 		 receiver->td_scale);
-	return 1;
+	return true;
 }
 
 #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
@@ -1129,11 +1127,13 @@ static int nlattr_to_tcp(struct nlattr *cda[], struct nf_conn *ct)
 	if (err < 0)
 		return err;
 
-	if (!tb[CTA_PROTOINFO_TCP_STATE])
+	if (tb[CTA_PROTOINFO_TCP_STATE] &&
+	    nla_get_u8(tb[CTA_PROTOINFO_TCP_STATE]) >= TCP_CONNTRACK_MAX)
 		return -EINVAL;
 
 	write_lock_bh(&tcp_lock);
-	ct->proto.tcp.state = nla_get_u8(tb[CTA_PROTOINFO_TCP_STATE]);
+	if (tb[CTA_PROTOINFO_TCP_STATE])
+		ct->proto.tcp.state = nla_get_u8(tb[CTA_PROTOINFO_TCP_STATE]);
 
 	if (tb[CTA_PROTOINFO_TCP_FLAGS_ORIGINAL]) {
 		struct nf_ct_tcp_flags *attr =
diff --git a/net/netfilter/nf_conntrack_proto_udp.c b/net/netfilter/nf_conntrack_proto_udp.c
index b8a35cc06416..8b21762e65de 100644
--- a/net/netfilter/nf_conntrack_proto_udp.c
+++ b/net/netfilter/nf_conntrack_proto_udp.c
@@ -26,7 +26,7 @@
 static unsigned int nf_ct_udp_timeout __read_mostly = 30*HZ;
 static unsigned int nf_ct_udp_timeout_stream __read_mostly = 180*HZ;
 
-static int udp_pkt_to_tuple(const struct sk_buff *skb,
+static bool udp_pkt_to_tuple(const struct sk_buff *skb,
 			     unsigned int dataoff,
 			     struct nf_conntrack_tuple *tuple)
 {
@@ -36,20 +36,20 @@ static int udp_pkt_to_tuple(const struct sk_buff *skb,
 	/* Actually only need first 8 bytes. */
 	hp = skb_header_pointer(skb, dataoff, sizeof(_hdr), &_hdr);
 	if (hp == NULL)
-		return 0;
+		return false;
 
 	tuple->src.u.udp.port = hp->source;
 	tuple->dst.u.udp.port = hp->dest;
 
-	return 1;
+	return true;
 }
 
-static int udp_invert_tuple(struct nf_conntrack_tuple *tuple,
-			    const struct nf_conntrack_tuple *orig)
+static bool udp_invert_tuple(struct nf_conntrack_tuple *tuple,
+			     const struct nf_conntrack_tuple *orig)
 {
 	tuple->src.u.udp.port = orig->dst.u.udp.port;
 	tuple->dst.u.udp.port = orig->src.u.udp.port;
-	return 1;
+	return true;
 }
 
 /* Print out the per-protocol part of the tuple. */
@@ -83,10 +83,10 @@ static int udp_packet(struct nf_conn *ct,
 }
 
 /* Called when a new connection for this protocol found. */
-static int udp_new(struct nf_conn *ct, const struct sk_buff *skb,
-		   unsigned int dataoff)
+static bool udp_new(struct nf_conn *ct, const struct sk_buff *skb,
+		    unsigned int dataoff)
 {
-	return 1;
+	return true;
 }
 
 static int udp_error(struct sk_buff *skb, unsigned int dataoff,
diff --git a/net/netfilter/nf_conntrack_proto_udplite.c b/net/netfilter/nf_conntrack_proto_udplite.c
index 9dd03c7aeac6..1fa62f3c24f1 100644
--- a/net/netfilter/nf_conntrack_proto_udplite.c
+++ b/net/netfilter/nf_conntrack_proto_udplite.c
@@ -27,28 +27,28 @@
 static unsigned int nf_ct_udplite_timeout __read_mostly = 30*HZ;
 static unsigned int nf_ct_udplite_timeout_stream __read_mostly = 180*HZ;
 
-static int udplite_pkt_to_tuple(const struct sk_buff *skb,
-				unsigned int dataoff,
-				struct nf_conntrack_tuple *tuple)
+static bool udplite_pkt_to_tuple(const struct sk_buff *skb,
+				 unsigned int dataoff,
+				 struct nf_conntrack_tuple *tuple)
 {
 	const struct udphdr *hp;
 	struct udphdr _hdr;
 
 	hp = skb_header_pointer(skb, dataoff, sizeof(_hdr), &_hdr);
 	if (hp == NULL)
-		return 0;
+		return false;
 
 	tuple->src.u.udp.port = hp->source;
 	tuple->dst.u.udp.port = hp->dest;
-	return 1;
+	return true;
 }
 
-static int udplite_invert_tuple(struct nf_conntrack_tuple *tuple,
-				const struct nf_conntrack_tuple *orig)
+static bool udplite_invert_tuple(struct nf_conntrack_tuple *tuple,
+				 const struct nf_conntrack_tuple *orig)
 {
 	tuple->src.u.udp.port = orig->dst.u.udp.port;
 	tuple->dst.u.udp.port = orig->src.u.udp.port;
-	return 1;
+	return true;
 }
 
 /* Print out the per-protocol part of the tuple. */
@@ -83,10 +83,10 @@ static int udplite_packet(struct nf_conn *ct,
 }
 
 /* Called when a new connection for this protocol found. */
-static int udplite_new(struct nf_conn *ct, const struct sk_buff *skb,
-		       unsigned int dataoff)
+static bool udplite_new(struct nf_conn *ct, const struct sk_buff *skb,
+			unsigned int dataoff)
 {
-	return 1;
+	return true;
 }
 
 static int udplite_error(struct sk_buff *skb, unsigned int dataoff,
@@ -127,32 +127,13 @@ static int udplite_error(struct sk_buff *skb, unsigned int dataoff,
 	}
 
 	/* Checksum invalid? Ignore. */
-	if (nf_conntrack_checksum && !skb_csum_unnecessary(skb) &&
-	    hooknum == NF_INET_PRE_ROUTING) {
-		if (pf == PF_INET) {
-			struct iphdr *iph = ip_hdr(skb);
-
-			skb->csum = csum_tcpudp_nofold(iph->saddr, iph->daddr,
-						       udplen, IPPROTO_UDPLITE, 0);
-		} else {
-			struct ipv6hdr *ipv6h = ipv6_hdr(skb);
-			__wsum hsum = skb_checksum(skb, 0, dataoff, 0);
-
-			skb->csum = ~csum_unfold(
-				csum_ipv6_magic(&ipv6h->saddr, &ipv6h->daddr,
-						udplen, IPPROTO_UDPLITE,
-						csum_sub(0, hsum)));
-		}
-
-		skb->ip_summed = CHECKSUM_NONE;
-		if (__skb_checksum_complete_head(skb, dataoff + cscov)) {
-			if (LOG_INVALID(IPPROTO_UDPLITE))
-				nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
-					      "nf_ct_udplite: bad UDPLite "
-					      "checksum ");
-			return -NF_ACCEPT;
-		}
-		skb->ip_summed = CHECKSUM_UNNECESSARY;
+	if (nf_conntrack_checksum && hooknum == NF_INET_PRE_ROUTING &&
+	    nf_checksum_partial(skb, hooknum, dataoff, cscov, IPPROTO_UDP,
+	    			pf)) {
+		if (LOG_INVALID(IPPROTO_UDPLITE))
+			nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
+				      "nf_ct_udplite: bad UDPLite checksum ");
+		return -NF_ACCEPT;
 	}
 
 	return NF_ACCEPT;
diff --git a/net/netfilter/nf_conntrack_sane.c b/net/netfilter/nf_conntrack_sane.c
index 7542e25eede3..a94294b2b23c 100644
--- a/net/netfilter/nf_conntrack_sane.c
+++ b/net/netfilter/nf_conntrack_sane.c
@@ -72,7 +72,6 @@ static int help(struct sk_buff *skb,
 	struct nf_conntrack_tuple *tuple;
 	struct sane_request *req;
 	struct sane_reply_net_start *reply;
-	int family = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num;
 
 	ct_sane_info = &nfct_help(ct)->help.ct_sane_info;
 	/* Until there's been traffic both ways, don't look in packets. */
@@ -143,12 +142,12 @@ static int help(struct sk_buff *skb,
 	}
 
 	tuple = &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple;
-	nf_ct_expect_init(exp, NF_CT_EXPECT_CLASS_DEFAULT, family,
+	nf_ct_expect_init(exp, NF_CT_EXPECT_CLASS_DEFAULT, nf_ct_l3num(ct),
 			  &tuple->src.u3, &tuple->dst.u3,
 			  IPPROTO_TCP, NULL, &reply->port);
 
 	pr_debug("nf_ct_sane: expect: ");
-	NF_CT_DUMP_TUPLE(&exp->tuple);
+	nf_ct_dump_tuple(&exp->tuple);
 
 	/* Can't expect this?  Best to drop packet now. */
 	if (nf_ct_expect_related(exp) != 0)
diff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c
index da5dec6e6158..65b3ba57a3b7 100644
--- a/net/netfilter/nf_conntrack_sip.c
+++ b/net/netfilter/nf_conntrack_sip.c
@@ -142,10 +142,10 @@ static int parse_addr(const struct nf_conn *ct, const char *cp,
                       const char *limit)
 {
 	const char *end;
-	int family = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num;
 	int ret = 0;
 
-	switch (family) {
+	memset(addr, 0, sizeof(*addr));
+	switch (nf_ct_l3num(ct)) {
 	case AF_INET:
 		ret = in4_pton(cp, limit - cp, (u8 *)&addr->ip, -1, &end);
 		break;
@@ -739,7 +739,6 @@ static int set_expected_rtp_rtcp(struct sk_buff *skb,
 	enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
 	union nf_inet_addr *saddr;
 	struct nf_conntrack_tuple tuple;
-	int family = ct->tuplehash[!dir].tuple.src.l3num;
 	int direct_rtp = 0, skip_expect = 0, ret = NF_DROP;
 	u_int16_t base_port;
 	__be16 rtp_port, rtcp_port;
@@ -769,7 +768,7 @@ static int set_expected_rtp_rtcp(struct sk_buff *skb,
 	memset(&tuple, 0, sizeof(tuple));
 	if (saddr)
 		tuple.src.u3 = *saddr;
-	tuple.src.l3num		= family;
+	tuple.src.l3num		= nf_ct_l3num(ct);
 	tuple.dst.protonum	= IPPROTO_UDP;
 	tuple.dst.u3		= *daddr;
 	tuple.dst.u.udp.port	= port;
@@ -814,13 +813,13 @@ static int set_expected_rtp_rtcp(struct sk_buff *skb,
 	rtp_exp = nf_ct_expect_alloc(ct);
 	if (rtp_exp == NULL)
 		goto err1;
-	nf_ct_expect_init(rtp_exp, class, family, saddr, daddr,
+	nf_ct_expect_init(rtp_exp, class, nf_ct_l3num(ct), saddr, daddr,
 			  IPPROTO_UDP, NULL, &rtp_port);
 
 	rtcp_exp = nf_ct_expect_alloc(ct);
 	if (rtcp_exp == NULL)
 		goto err2;
-	nf_ct_expect_init(rtcp_exp, class, family, saddr, daddr,
+	nf_ct_expect_init(rtcp_exp, class, nf_ct_l3num(ct), saddr, daddr,
 			  IPPROTO_UDP, NULL, &rtcp_port);
 
 	nf_nat_sdp_media = rcu_dereference(nf_nat_sdp_media_hook);
@@ -870,7 +869,6 @@ static int process_sdp(struct sk_buff *skb,
 {
 	enum ip_conntrack_info ctinfo;
 	struct nf_conn *ct = nf_ct_get(skb, &ctinfo);
-	int family = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num;
 	unsigned int matchoff, matchlen;
 	unsigned int mediaoff, medialen;
 	unsigned int sdpoff;
@@ -885,8 +883,8 @@ static int process_sdp(struct sk_buff *skb,
 	typeof(nf_nat_sdp_session_hook) nf_nat_sdp_session;
 
 	nf_nat_sdp_addr = rcu_dereference(nf_nat_sdp_addr_hook);
-	c_hdr = family == AF_INET ? SDP_HDR_CONNECTION_IP4 :
-				    SDP_HDR_CONNECTION_IP6;
+	c_hdr = nf_ct_l3num(ct) == AF_INET ? SDP_HDR_CONNECTION_IP4 :
+					     SDP_HDR_CONNECTION_IP6;
 
 	/* Find beginning of session description */
 	if (ct_sip_get_sdp_header(ct, *dptr, 0, *datalen,
@@ -1033,7 +1031,6 @@ static int process_register_request(struct sk_buff *skb,
 	struct nf_conn *ct = nf_ct_get(skb, &ctinfo);
 	struct nf_conn_help *help = nfct_help(ct);
 	enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
-	int family = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num;
 	unsigned int matchoff, matchlen;
 	struct nf_conntrack_expect *exp;
 	union nf_inet_addr *saddr, daddr;
@@ -1088,8 +1085,8 @@ static int process_register_request(struct sk_buff *skb,
 	if (sip_direct_signalling)
 		saddr = &ct->tuplehash[!dir].tuple.src.u3;
 
-	nf_ct_expect_init(exp, SIP_EXPECT_SIGNALLING, family, saddr, &daddr,
-			  IPPROTO_UDP, NULL, &port);
+	nf_ct_expect_init(exp, SIP_EXPECT_SIGNALLING, nf_ct_l3num(ct),
+			  saddr, &daddr, IPPROTO_UDP, NULL, &port);
 	exp->timeout.expires = sip_timeout * HZ;
 	exp->helper = nfct_help(ct)->helper;
 	exp->flags = NF_CT_EXPECT_PERMANENT | NF_CT_EXPECT_INACTIVE;
diff --git a/net/netfilter/nf_conntrack_standalone.c b/net/netfilter/nf_conntrack_standalone.c
index 9d0b8bb4113c..b59871f6bdda 100644
--- a/net/netfilter/nf_conntrack_standalone.c
+++ b/net/netfilter/nf_conntrack_standalone.c
@@ -127,21 +127,14 @@ static int ct_seq_show(struct seq_file *s, void *v)
 	if (NF_CT_DIRECTION(hash))
 		return 0;
 
-	l3proto = __nf_ct_l3proto_find(ct->tuplehash[IP_CT_DIR_ORIGINAL]
-				       .tuple.src.l3num);
-
+	l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct));
 	NF_CT_ASSERT(l3proto);
-	l4proto = __nf_ct_l4proto_find(ct->tuplehash[IP_CT_DIR_ORIGINAL]
-				   .tuple.src.l3num,
-				   ct->tuplehash[IP_CT_DIR_ORIGINAL]
-				   .tuple.dst.protonum);
+	l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
 	NF_CT_ASSERT(l4proto);
 
 	if (seq_printf(s, "%-8s %u %-8s %u %ld ",
-		       l3proto->name,
-		       ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num,
-		       l4proto->name,
-		       ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum,
+		       l3proto->name, nf_ct_l3num(ct),
+		       l4proto->name, nf_ct_protonum(ct),
 		       timer_pending(&ct->timeout)
 		       ? (long)(ct->timeout.expires - jiffies)/HZ : 0) != 0)
 		return -ENOSPC;
@@ -295,6 +288,41 @@ static const struct file_operations ct_cpu_seq_fops = {
 	.llseek	 = seq_lseek,
 	.release = seq_release,
 };
+
+static int nf_conntrack_standalone_init_proc(void)
+{
+	struct proc_dir_entry *pde;
+
+	pde = proc_net_fops_create(&init_net, "nf_conntrack", 0440, &ct_file_ops);
+	if (!pde)
+		goto out_nf_conntrack;
+	pde = create_proc_entry("nf_conntrack", S_IRUGO, init_net.proc_net_stat);
+	if (!pde)
+		goto out_stat_nf_conntrack;
+	pde->proc_fops = &ct_cpu_seq_fops;
+	pde->owner = THIS_MODULE;
+	return 0;
+
+out_stat_nf_conntrack:
+	proc_net_remove(&init_net, "nf_conntrack");
+out_nf_conntrack:
+	return -ENOMEM;
+}
+
+static void nf_conntrack_standalone_fini_proc(void)
+{
+	remove_proc_entry("nf_conntrack", init_net.proc_net_stat);
+	proc_net_remove(&init_net, "nf_conntrack");
+}
+#else
+static int nf_conntrack_standalone_init_proc(void)
+{
+	return 0;
+}
+
+static void nf_conntrack_standalone_fini_proc(void)
+{
+}
 #endif /* CONFIG_PROC_FS */
 
 /* Sysctl support */
@@ -390,60 +418,61 @@ static struct ctl_path nf_ct_path[] = {
 };
 
 EXPORT_SYMBOL_GPL(nf_ct_log_invalid);
+
+static int nf_conntrack_standalone_init_sysctl(void)
+{
+	nf_ct_sysctl_header =
+		register_sysctl_paths(nf_ct_path, nf_ct_netfilter_table);
+	if (nf_ct_sysctl_header == NULL) {
+		printk("nf_conntrack: can't register to sysctl.\n");
+		return -ENOMEM;
+	}
+	return 0;
+
+}
+
+static void nf_conntrack_standalone_fini_sysctl(void)
+{
+	unregister_sysctl_table(nf_ct_sysctl_header);
+}
+#else
+static int nf_conntrack_standalone_init_sysctl(void)
+{
+	return 0;
+}
+
+static void nf_conntrack_standalone_fini_sysctl(void)
+{
+}
 #endif /* CONFIG_SYSCTL */
 
 static int __init nf_conntrack_standalone_init(void)
 {
-#ifdef CONFIG_PROC_FS
-	struct proc_dir_entry *proc;
-#endif
-	int ret = 0;
+	int ret;
 
 	ret = nf_conntrack_init();
 	if (ret < 0)
-		return ret;
-
-#ifdef CONFIG_PROC_FS
-	proc = proc_net_fops_create(&init_net, "nf_conntrack", 0440, &ct_file_ops);
-	if (!proc) goto cleanup_init;
-
-	if (!proc_create("nf_conntrack", S_IRUGO,
-			 init_net.proc_net_stat, &ct_cpu_seq_fops))
-		goto cleanup_proc;
-#endif
-#ifdef CONFIG_SYSCTL
-	nf_ct_sysctl_header = register_sysctl_paths(nf_ct_path,
-			nf_ct_netfilter_table);
-	if (nf_ct_sysctl_header == NULL) {
-		printk("nf_conntrack: can't register to sysctl.\n");
-		ret = -ENOMEM;
-		goto cleanup_proc_stat;
-	}
-#endif
-	return ret;
+		goto out;
+	ret = nf_conntrack_standalone_init_proc();
+	if (ret < 0)
+		goto out_proc;
+	ret = nf_conntrack_standalone_init_sysctl();
+	if (ret < 0)
+		goto out_sysctl;
+	return 0;
 
-#ifdef CONFIG_SYSCTL
- cleanup_proc_stat:
-#endif
-#ifdef CONFIG_PROC_FS
-	remove_proc_entry("nf_conntrack", init_net. proc_net_stat);
- cleanup_proc:
-	proc_net_remove(&init_net, "nf_conntrack");
- cleanup_init:
-#endif /* CNFIG_PROC_FS */
+out_sysctl:
+	nf_conntrack_standalone_fini_proc();
+out_proc:
 	nf_conntrack_cleanup();
+out:
 	return ret;
 }
 
 static void __exit nf_conntrack_standalone_fini(void)
 {
-#ifdef CONFIG_SYSCTL
-	unregister_sysctl_table(nf_ct_sysctl_header);
-#endif
-#ifdef CONFIG_PROC_FS
-	remove_proc_entry("nf_conntrack", init_net.proc_net_stat);
-	proc_net_remove(&init_net, "nf_conntrack");
-#endif /* CNFIG_PROC_FS */
+	nf_conntrack_standalone_fini_sysctl();
+	nf_conntrack_standalone_fini_proc();
 	nf_conntrack_cleanup();
 }
 
diff --git a/net/netfilter/nf_conntrack_tftp.c b/net/netfilter/nf_conntrack_tftp.c
index a28341b30f21..f57f6e7a71ee 100644
--- a/net/netfilter/nf_conntrack_tftp.c
+++ b/net/netfilter/nf_conntrack_tftp.c
@@ -44,7 +44,6 @@ static int tftp_help(struct sk_buff *skb,
 	struct nf_conntrack_expect *exp;
 	struct nf_conntrack_tuple *tuple;
 	unsigned int ret = NF_ACCEPT;
-	int family = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num;
 	typeof(nf_nat_tftp_hook) nf_nat_tftp;
 
 	tfh = skb_header_pointer(skb, protoff + sizeof(struct udphdr),
@@ -56,19 +55,20 @@ static int tftp_help(struct sk_buff *skb,
 	case TFTP_OPCODE_READ:
 	case TFTP_OPCODE_WRITE:
 		/* RRQ and WRQ works the same way */
-		NF_CT_DUMP_TUPLE(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
-		NF_CT_DUMP_TUPLE(&ct->tuplehash[IP_CT_DIR_REPLY].tuple);
+		nf_ct_dump_tuple(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
+		nf_ct_dump_tuple(&ct->tuplehash[IP_CT_DIR_REPLY].tuple);
 
 		exp = nf_ct_expect_alloc(ct);
 		if (exp == NULL)
 			return NF_DROP;
 		tuple = &ct->tuplehash[IP_CT_DIR_REPLY].tuple;
-		nf_ct_expect_init(exp, NF_CT_EXPECT_CLASS_DEFAULT, family,
+		nf_ct_expect_init(exp, NF_CT_EXPECT_CLASS_DEFAULT,
+				  nf_ct_l3num(ct),
 				  &tuple->src.u3, &tuple->dst.u3,
 				  IPPROTO_UDP, NULL, &tuple->dst.u.udp.port);
 
 		pr_debug("expect: ");
-		NF_CT_DUMP_TUPLE(&exp->tuple);
+		nf_ct_dump_tuple(&exp->tuple);
 
 		nf_nat_tftp = rcu_dereference(nf_nat_tftp_hook);
 		if (nf_nat_tftp && ct->status & IPS_NAT_MASK)
diff --git a/net/netfilter/x_tables.c b/net/netfilter/x_tables.c
index 0bd95680a494..f52f7f810ac4 100644
--- a/net/netfilter/x_tables.c
+++ b/net/netfilter/x_tables.c
@@ -58,7 +58,7 @@ static struct xt_af *xt;
 #define duprintf(format, args...)
 #endif
 
-static const char *xt_prefix[NPROTO] = {
+static const char *const xt_prefix[NPROTO] = {
 	[AF_INET]	= "ip",
 	[AF_INET6]	= "ip6",
 	[NF_ARP]	= "arp",
@@ -248,7 +248,7 @@ EXPORT_SYMBOL_GPL(xt_request_find_target);
 
 static int match_revfn(int af, const char *name, u8 revision, int *bestp)
 {
-	struct xt_match *m;
+	const struct xt_match *m;
 	int have_rev = 0;
 
 	list_for_each_entry(m, &xt[af].match, list) {
@@ -264,7 +264,7 @@ static int match_revfn(int af, const char *name, u8 revision, int *bestp)
 
 static int target_revfn(int af, const char *name, u8 revision, int *bestp)
 {
-	struct xt_target *t;
+	const struct xt_target *t;
 	int have_rev = 0;
 
 	list_for_each_entry(t, &xt[af].target, list) {
@@ -385,7 +385,7 @@ short xt_compat_calc_jump(int af, unsigned int offset)
 }
 EXPORT_SYMBOL_GPL(xt_compat_calc_jump);
 
-int xt_compat_match_offset(struct xt_match *match)
+int xt_compat_match_offset(const struct xt_match *match)
 {
 	u_int16_t csize = match->compatsize ? : match->matchsize;
 	return XT_ALIGN(match->matchsize) - COMPAT_XT_ALIGN(csize);
@@ -395,7 +395,7 @@ EXPORT_SYMBOL_GPL(xt_compat_match_offset);
 int xt_compat_match_from_user(struct xt_entry_match *m, void **dstptr,
 			      unsigned int *size)
 {
-	struct xt_match *match = m->u.kernel.match;
+	const struct xt_match *match = m->u.kernel.match;
 	struct compat_xt_entry_match *cm = (struct compat_xt_entry_match *)m;
 	int pad, off = xt_compat_match_offset(match);
 	u_int16_t msize = cm->u.user.match_size;
@@ -422,7 +422,7 @@ EXPORT_SYMBOL_GPL(xt_compat_match_from_user);
 int xt_compat_match_to_user(struct xt_entry_match *m, void __user **dstptr,
 			    unsigned int *size)
 {
-	struct xt_match *match = m->u.kernel.match;
+	const struct xt_match *match = m->u.kernel.match;
 	struct compat_xt_entry_match __user *cm = *dstptr;
 	int off = xt_compat_match_offset(match);
 	u_int16_t msize = m->u.user.match_size - off;
@@ -479,7 +479,7 @@ int xt_check_target(const struct xt_target *target, unsigned short family,
 EXPORT_SYMBOL_GPL(xt_check_target);
 
 #ifdef CONFIG_COMPAT
-int xt_compat_target_offset(struct xt_target *target)
+int xt_compat_target_offset(const struct xt_target *target)
 {
 	u_int16_t csize = target->compatsize ? : target->targetsize;
 	return XT_ALIGN(target->targetsize) - COMPAT_XT_ALIGN(csize);
@@ -489,7 +489,7 @@ EXPORT_SYMBOL_GPL(xt_compat_target_offset);
 void xt_compat_target_from_user(struct xt_entry_target *t, void **dstptr,
 				unsigned int *size)
 {
-	struct xt_target *target = t->u.kernel.target;
+	const struct xt_target *target = t->u.kernel.target;
 	struct compat_xt_entry_target *ct = (struct compat_xt_entry_target *)t;
 	int pad, off = xt_compat_target_offset(target);
 	u_int16_t tsize = ct->u.user.target_size;
@@ -515,7 +515,7 @@ EXPORT_SYMBOL_GPL(xt_compat_target_from_user);
 int xt_compat_target_to_user(struct xt_entry_target *t, void __user **dstptr,
 			     unsigned int *size)
 {
-	struct xt_target *target = t->u.kernel.target;
+	const struct xt_target *target = t->u.kernel.target;
 	struct compat_xt_entry_target __user *ct = *dstptr;
 	int off = xt_compat_target_offset(target);
 	u_int16_t tsize = t->u.user.target_size - off;
diff --git a/net/netfilter/xt_CONNSECMARK.c b/net/netfilter/xt_CONNSECMARK.c
index 1faa9136195d..211189eb2b67 100644
--- a/net/netfilter/xt_CONNSECMARK.c
+++ b/net/netfilter/xt_CONNSECMARK.c
@@ -55,7 +55,7 @@ static void secmark_save(const struct sk_buff *skb)
 static void secmark_restore(struct sk_buff *skb)
 {
 	if (!skb->secmark) {
-		struct nf_conn *ct;
+		const struct nf_conn *ct;
 		enum ip_conntrack_info ctinfo;
 
 		ct = nf_ct_get(skb, &ctinfo);
diff --git a/net/netfilter/xt_RATEEST.c b/net/netfilter/xt_RATEEST.c
index 24c73ba31eaa..64d6ad380293 100644
--- a/net/netfilter/xt_RATEEST.c
+++ b/net/netfilter/xt_RATEEST.c
@@ -96,7 +96,7 @@ xt_rateest_tg_checkentry(const char *tablename,
 			 void *targinfo,
 			 unsigned int hook_mask)
 {
-	struct xt_rateest_target_info *info = (void *)targinfo;
+	struct xt_rateest_target_info *info = targinfo;
 	struct xt_rateest *est;
 	struct {
 		struct nlattr		opt;
diff --git a/net/netfilter/xt_connlimit.c b/net/netfilter/xt_connlimit.c
index 3b0111933f60..2e89a00df92c 100644
--- a/net/netfilter/xt_connlimit.c
+++ b/net/netfilter/xt_connlimit.c
@@ -72,9 +72,7 @@ connlimit_iphash6(const union nf_inet_addr *addr,
 
 static inline bool already_closed(const struct nf_conn *conn)
 {
-	u_int16_t proto = conn->tuplehash[0].tuple.dst.protonum;
-
-	if (proto == IPPROTO_TCP)
+	if (nf_ct_protonum(conn) == IPPROTO_TCP)
 		return conn->proto.tcp.state == TCP_CONNTRACK_TIME_WAIT;
 	else
 		return 0;
@@ -106,10 +104,10 @@ static int count_them(struct xt_connlimit_data *data,
 		      const union nf_inet_addr *mask,
 		      const struct xt_match *match)
 {
-	struct nf_conntrack_tuple_hash *found;
+	const struct nf_conntrack_tuple_hash *found;
 	struct xt_connlimit_conn *conn;
 	struct xt_connlimit_conn *tmp;
-	struct nf_conn *found_ct;
+	const struct nf_conn *found_ct;
 	struct list_head *hash;
 	bool addit = true;
 	int matches = 0;
@@ -256,7 +254,7 @@ connlimit_mt_check(const char *tablename, const void *ip,
 static void
 connlimit_mt_destroy(const struct xt_match *match, void *matchinfo)
 {
-	struct xt_connlimit_info *info = matchinfo;
+	const struct xt_connlimit_info *info = matchinfo;
 	struct xt_connlimit_conn *conn;
 	struct xt_connlimit_conn *tmp;
 	struct list_head *hash = info->data->iphash;
diff --git a/net/netfilter/xt_conntrack.c b/net/netfilter/xt_conntrack.c
index 0c50b2894055..d61412f58ef7 100644
--- a/net/netfilter/xt_conntrack.c
+++ b/net/netfilter/xt_conntrack.c
@@ -65,7 +65,7 @@ conntrack_mt_v0(const struct sk_buff *skb, const struct net_device *in,
 	}
 
 	if (sinfo->flags & XT_CONNTRACK_PROTO &&
-	    FWINV(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum !=
+	    FWINV(nf_ct_protonum(ct) !=
 		  sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.protonum,
 		  XT_CONNTRACK_PROTO))
 		return false;
@@ -174,7 +174,7 @@ ct_proto_port_check(const struct xt_conntrack_mtinfo1 *info,
 
 	tuple = &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple;
 	if ((info->match_flags & XT_CONNTRACK_PROTO) &&
-	    (tuple->dst.protonum == info->l4proto) ^
+	    (nf_ct_protonum(ct) == info->l4proto) ^
 	    !(info->invert_flags & XT_CONNTRACK_PROTO))
 		return false;
 
diff --git a/net/netfilter/xt_dccp.c b/net/netfilter/xt_dccp.c
index 667f45e72cd9..8b6522186d9f 100644
--- a/net/netfilter/xt_dccp.c
+++ b/net/netfilter/xt_dccp.c
@@ -98,7 +98,8 @@ dccp_mt(const struct sk_buff *skb, const struct net_device *in,
         const void *matchinfo, int offset, unsigned int protoff, bool *hotdrop)
 {
 	const struct xt_dccp_info *info = matchinfo;
-	struct dccp_hdr _dh, *dh;
+	const struct dccp_hdr *dh;
+	struct dccp_hdr _dh;
 
 	if (offset)
 		return false;
diff --git a/net/netfilter/xt_esp.c b/net/netfilter/xt_esp.c
index 71c7c3785266..a133eb9b23e1 100644
--- a/net/netfilter/xt_esp.c
+++ b/net/netfilter/xt_esp.c
@@ -47,7 +47,8 @@ esp_mt(const struct sk_buff *skb, const struct net_device *in,
        const struct net_device *out, const struct xt_match *match,
        const void *matchinfo, int offset, unsigned int protoff, bool *hotdrop)
 {
-	struct ip_esp_hdr _esp, *eh;
+	const struct ip_esp_hdr *eh;
+	struct ip_esp_hdr _esp;
 	const struct xt_esp *espinfo = matchinfo;
 
 	/* Must not be a fragment. */
diff --git a/net/netfilter/xt_multiport.c b/net/netfilter/xt_multiport.c
index 31daa8192422..fd88c489b70e 100644
--- a/net/netfilter/xt_multiport.c
+++ b/net/netfilter/xt_multiport.c
@@ -100,7 +100,8 @@ multiport_mt_v0(const struct sk_buff *skb, const struct net_device *in,
                 const void *matchinfo, int offset, unsigned int protoff,
                 bool *hotdrop)
 {
-	__be16 _ports[2], *pptr;
+	const __be16 *pptr;
+	__be16 _ports[2];
 	const struct xt_multiport *multiinfo = matchinfo;
 
 	if (offset)
@@ -126,7 +127,8 @@ multiport_mt(const struct sk_buff *skb, const struct net_device *in,
              const void *matchinfo, int offset, unsigned int protoff,
              bool *hotdrop)
 {
-	__be16 _ports[2], *pptr;
+	const __be16 *pptr;
+	__be16 _ports[2];
 	const struct xt_multiport_v1 *multiinfo = matchinfo;
 
 	if (offset)
diff --git a/net/netfilter/xt_policy.c b/net/netfilter/xt_policy.c
index 9e918add2282..d351582b2a3d 100644
--- a/net/netfilter/xt_policy.c
+++ b/net/netfilter/xt_policy.c
@@ -136,7 +136,7 @@ policy_mt_check(const char *tablename, const void *ip_void,
                 const struct xt_match *match, void *matchinfo,
                 unsigned int hook_mask)
 {
-	struct xt_policy_info *info = matchinfo;
+	const struct xt_policy_info *info = matchinfo;
 
 	if (!(info->flags & (XT_POLICY_MATCH_IN|XT_POLICY_MATCH_OUT))) {
 		printk(KERN_ERR "xt_policy: neither incoming nor "
diff --git a/net/netfilter/xt_rateest.c b/net/netfilter/xt_rateest.c
index fdb86a515146..ebd84f1b4f62 100644
--- a/net/netfilter/xt_rateest.c
+++ b/net/netfilter/xt_rateest.c
@@ -86,7 +86,7 @@ static bool xt_rateest_mt_checkentry(const char *tablename,
 				     void *matchinfo,
 				     unsigned int hook_mask)
 {
-	struct xt_rateest_match_info *info = (void *)matchinfo;
+	struct xt_rateest_match_info *info = matchinfo;
 	struct xt_rateest *est1, *est2;
 
 	if (hweight32(info->flags & (XT_RATEEST_MATCH_ABS |
@@ -130,7 +130,7 @@ err1:
 static void xt_rateest_mt_destroy(const struct xt_match *match,
 				  void *matchinfo)
 {
-	struct xt_rateest_match_info *info = (void *)matchinfo;
+	struct xt_rateest_match_info *info = matchinfo;
 
 	xt_rateest_put(info->est1);
 	if (info->est2)
diff --git a/net/netfilter/xt_sctp.c b/net/netfilter/xt_sctp.c
index b718ec64333d..e6e4681fa047 100644
--- a/net/netfilter/xt_sctp.c
+++ b/net/netfilter/xt_sctp.c
@@ -46,7 +46,8 @@ match_packet(const struct sk_buff *skb,
 	     bool *hotdrop)
 {
 	u_int32_t chunkmapcopy[256 / sizeof (u_int32_t)];
-	sctp_chunkhdr_t _sch, *sch;
+	const sctp_chunkhdr_t *sch;
+	sctp_chunkhdr_t _sch;
 	int chunk_match_type = info->chunk_match_type;
 	const struct xt_sctp_flag_info *flag_info = info->flag_info;
 	int flag_count = info->flag_count;
@@ -121,7 +122,8 @@ sctp_mt(const struct sk_buff *skb, const struct net_device *in,
         const void *matchinfo, int offset, unsigned int protoff, bool *hotdrop)
 {
 	const struct xt_sctp_info *info = matchinfo;
-	sctp_sctphdr_t _sh, *sh;
+	const sctp_sctphdr_t *sh;
+	sctp_sctphdr_t _sh;
 
 	if (offset) {
 		duprintf("Dropping non-first fragment.. FIXME\n");
diff --git a/net/netfilter/xt_tcpmss.c b/net/netfilter/xt_tcpmss.c
index d7a5b27fe81e..6771bf01275b 100644
--- a/net/netfilter/xt_tcpmss.c
+++ b/net/netfilter/xt_tcpmss.c
@@ -31,9 +31,11 @@ tcpmss_mt(const struct sk_buff *skb, const struct net_device *in,
           bool *hotdrop)
 {
 	const struct xt_tcpmss_match_info *info = matchinfo;
-	struct tcphdr _tcph, *th;
+	const struct tcphdr *th;
+	struct tcphdr _tcph;
 	/* tcp.doff is only 4 bits, ie. max 15 * 4 bytes */
-	u8 _opt[15 * 4 - sizeof(_tcph)], *op;
+	const u_int8_t *op;
+	u8 _opt[15 * 4 - sizeof(_tcph)];
 	unsigned int i, optlen;
 
 	/* If we don't have the whole header, drop packet. */
diff --git a/net/netfilter/xt_tcpudp.c b/net/netfilter/xt_tcpudp.c
index 4fa3b669f691..951b06b8d701 100644
--- a/net/netfilter/xt_tcpudp.c
+++ b/net/netfilter/xt_tcpudp.c
@@ -42,7 +42,8 @@ tcp_find_option(u_int8_t option,
 		bool *hotdrop)
 {
 	/* tcp.doff is only 4 bits, ie. max 15 * 4 bytes */
-	u_int8_t _opt[60 - sizeof(struct tcphdr)], *op;
+	const u_int8_t *op;
+	u_int8_t _opt[60 - sizeof(struct tcphdr)];
 	unsigned int i;
 
 	duprintf("tcp_match: finding option\n");
@@ -72,7 +73,8 @@ tcp_mt(const struct sk_buff *skb, const struct net_device *in,
        const struct net_device *out, const struct xt_match *match,
        const void *matchinfo, int offset, unsigned int protoff, bool *hotdrop)
 {
-	struct tcphdr _tcph, *th;
+	const struct tcphdr *th;
+	struct tcphdr _tcph;
 	const struct xt_tcp *tcpinfo = matchinfo;
 
 	if (offset) {
@@ -144,7 +146,8 @@ udp_mt(const struct sk_buff *skb, const struct net_device *in,
        const struct net_device *out, const struct xt_match *match,
        const void *matchinfo, int offset, unsigned int protoff, bool *hotdrop)
 {
-	struct udphdr _udph, *uh;
+	const struct udphdr *uh;
+	struct udphdr _udph;
 	const struct xt_udp *udpinfo = matchinfo;
 
 	/* Must not be a fragment. */
diff --git a/net/netfilter/xt_time.c b/net/netfilter/xt_time.c
index 9fa2e0824708..ed76baab4734 100644
--- a/net/netfilter/xt_time.c
+++ b/net/netfilter/xt_time.c
@@ -223,7 +223,7 @@ time_mt_check(const char *tablename, const void *ip,
               const struct xt_match *match, void *matchinfo,
               unsigned int hook_mask)
 {
-	struct xt_time_info *info = matchinfo;
+	const struct xt_time_info *info = matchinfo;
 
 	if (info->daytime_start > XT_TIME_MAX_DAYTIME ||
 	    info->daytime_stop > XT_TIME_MAX_DAYTIME) {