Merge with Linus' kernel.

13 files changed, 1572 insertions, 313 deletions

diff --git a/net/dccp/Makefile b/net/dccp/Makefile
index 344a8da153fc..87b27fff6e3b 100644
--- a/net/dccp/Makefile
+++ b/net/dccp/Makefile
@@ -1,3 +1,7 @@
+obj-$(CONFIG_IPV6) += dccp_ipv6.o
+
+dccp_ipv6-y := ipv6.o
+
 obj-$(CONFIG_IP_DCCP) += dccp.o
 
 dccp-y := ccid.o input.o ipv4.o minisocks.o options.o output.o proto.o \
diff --git a/net/dccp/ackvec.c b/net/dccp/ackvec.c
index c9a62cca22fc..ce9cb77c5c29 100644
--- a/net/dccp/ackvec.c
+++ b/net/dccp/ackvec.c
@@ -55,8 +55,8 @@ int dccp_insert_option_ackvec(struct sock *sk, struct sk_buff *skb)
 	from = av->dccpav_buf + av->dccpav_buf_head;
 
 	/* Check if buf_head wraps */
-	if (av->dccpav_buf_head + len > av->dccpav_vec_len) {
-		const u32 tailsize = (av->dccpav_vec_len - av->dccpav_buf_head);
+	if ((int)av->dccpav_buf_head + len > av->dccpav_vec_len) {
+		const u32 tailsize = av->dccpav_vec_len - av->dccpav_buf_head;
 
 		memcpy(to, from, tailsize);
 		to   += tailsize;
@@ -93,8 +93,14 @@ int dccp_insert_option_ackvec(struct sock *sk, struct sk_buff *skb)
 struct dccp_ackvec *dccp_ackvec_alloc(const unsigned int len,
 				      const gfp_t priority)
 {
-	struct dccp_ackvec *av = kmalloc(sizeof(*av) + len, priority);
+	struct dccp_ackvec *av;
 
+	BUG_ON(len == 0);
+
+	if (len > DCCP_MAX_ACKVEC_LEN)
+		return NULL;
+
+	av = kmalloc(sizeof(*av) + len, priority);
 	if (av != NULL) {
 		av->dccpav_buf_len	= len;
 		av->dccpav_buf_head	=
@@ -117,13 +123,13 @@ void dccp_ackvec_free(struct dccp_ackvec *av)
 }
 
 static inline u8 dccp_ackvec_state(const struct dccp_ackvec *av,
-				   const unsigned int index)
+				   const u8 index)
 {
 	return av->dccpav_buf[index] & DCCP_ACKVEC_STATE_MASK;
 }
 
 static inline u8 dccp_ackvec_len(const struct dccp_ackvec *av,
-				 const unsigned int index)
+				 const u8 index)
 {
 	return av->dccpav_buf[index] & DCCP_ACKVEC_LEN_MASK;
 }
@@ -135,7 +141,7 @@ static inline u8 dccp_ackvec_len(const struct dccp_ackvec *av,
  */
 static inline int dccp_ackvec_set_buf_head_state(struct dccp_ackvec *av,
 						 const unsigned int packets,
-						  const unsigned char state)
+						 const unsigned char state)
 {
 	unsigned int gap;
 	signed long new_head;
@@ -223,7 +229,7 @@ int dccp_ackvec_add(struct dccp_ackvec *av, const struct sock *sk,
 		 *	could reduce the complexity of this scan.)
 		 */
 		u64 delta = dccp_delta_seqno(ackno, av->dccpav_buf_ackno);
-		unsigned int index = av->dccpav_buf_head;
+		u8 index = av->dccpav_buf_head;
 
 		while (1) {
 			const u8 len = dccp_ackvec_len(av, index);
@@ -291,7 +297,7 @@ void dccp_ackvec_print(const struct dccp_ackvec *av)
 }
 #endif
 
-static void dccp_ackvec_trow_away_ack_record(struct dccp_ackvec *av)
+static void dccp_ackvec_throw_away_ack_record(struct dccp_ackvec *av)
 {
 	/*
 	 * As we're keeping track of the ack vector size (dccpav_vec_len) and
@@ -301,9 +307,10 @@ static void dccp_ackvec_trow_away_ack_record(struct dccp_ackvec *av)
 	 * draft-ietf-dccp-spec-11.txt Appendix A. -acme
 	 */
 #if 0
-	av->dccpav_buf_tail = av->dccpav_ack_ptr + 1;
-	if (av->dccpav_buf_tail >= av->dccpav_vec_len)
-		av->dccpav_buf_tail -= av->dccpav_vec_len;
+	u32 new_buf_tail = av->dccpav_ack_ptr + 1;
+	if (new_buf_tail >= av->dccpav_vec_len)
+		new_buf_tail -= av->dccpav_vec_len;
+	av->dccpav_buf_tail = new_buf_tail;
 #endif
 	av->dccpav_vec_len -= av->dccpav_sent_len;
 }
@@ -326,7 +333,7 @@ void dccp_ackvec_check_rcv_ackno(struct dccp_ackvec *av, struct sock *sk,
 			      debug_prefix, 1,
 			      (unsigned long long)av->dccpav_ack_seqno,
 			      (unsigned long long)av->dccpav_ack_ackno);
-		dccp_ackvec_trow_away_ack_record(av);
+		dccp_ackvec_throw_away_ack_record(av);
 		av->dccpav_ack_seqno = DCCP_MAX_SEQNO + 1;
 	}
 }
@@ -389,7 +396,7 @@ static void dccp_ackvec_check_rcv_ackvector(struct dccp_ackvec *av,
 					      av->dccpav_ack_seqno,
 					      (unsigned long long)
 					      av->dccpav_ack_ackno);
-				dccp_ackvec_trow_away_ack_record(av);
+				dccp_ackvec_throw_away_ack_record(av);
 			}
 			/*
 			 * If dccpav_ack_seqno was not received, no problem
diff --git a/net/dccp/ackvec.h b/net/dccp/ackvec.h
index d0fd6c60c574..f7dfb5f67b87 100644
--- a/net/dccp/ackvec.h
+++ b/net/dccp/ackvec.h
@@ -54,16 +54,16 @@
  * @dccpav_buf - circular buffer of acknowledgeable packets
  */
 struct dccp_ackvec {
-	unsigned int	dccpav_buf_head;
-	unsigned int	dccpav_buf_tail;
 	u64		dccpav_buf_ackno;
 	u64		dccpav_ack_seqno;
 	u64		dccpav_ack_ackno;
-	unsigned int	dccpav_ack_ptr;
-	unsigned int	dccpav_sent_len;
-	unsigned int	dccpav_vec_len;
-	unsigned int	dccpav_buf_len;
 	struct timeval	dccpav_time;
+	u8		dccpav_buf_head;
+	u8		dccpav_buf_tail;
+	u8		dccpav_ack_ptr;
+	u8		dccpav_sent_len;
+	u8		dccpav_vec_len;
+	u8		dccpav_buf_len;
 	u8		dccpav_buf_nonce;
 	u8		dccpav_ack_nonce;
 	u8		dccpav_buf[0];
diff --git a/net/dccp/ccid.h b/net/dccp/ccid.h
index c37eeeaf5c6e..de681c6ad081 100644
--- a/net/dccp/ccid.h
+++ b/net/dccp/ccid.h
@@ -21,6 +21,8 @@
 
 #define CCID_MAX 255
 
+struct tcp_info;
+
 struct ccid {
 	unsigned char	ccid_id;
 	const char	*ccid_name;
diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
index f97b85d55ad8..93f26dd6e6cb 100644
--- a/net/dccp/dccp.h
+++ b/net/dccp/dccp.h
@@ -59,7 +59,7 @@ extern void dccp_time_wait(struct sock *sk, int state, int timeo);
 
 #define DCCP_RTO_MAX ((unsigned)(120 * HZ)) /* FIXME: using TCP value */
 
-extern struct proto dccp_v4_prot;
+extern struct proto dccp_prot;
 
 /* is seq1 < seq2 ? */
 static inline int before48(const u64 seq1, const u64 seq2)
@@ -228,6 +228,9 @@ extern int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
 extern int dccp_rcv_established(struct sock *sk, struct sk_buff *skb,
 				const struct dccp_hdr *dh, const unsigned len);
 
+extern int dccp_v4_init_sock(struct sock *sk);
+extern int dccp_v4_destroy_sock(struct sock *sk);
+
 extern void		dccp_close(struct sock *sk, long timeout);
 extern struct sk_buff	*dccp_make_response(struct sock *sk,
 					    struct dst_entry *dst,
@@ -238,6 +241,7 @@ extern struct sk_buff	*dccp_make_reset(struct sock *sk,
 
 extern int	   dccp_connect(struct sock *sk);
 extern int	   dccp_disconnect(struct sock *sk, int flags);
+extern void	   dccp_unhash(struct sock *sk);
 extern int	   dccp_getsockopt(struct sock *sk, int level, int optname,
 				   char __user *optval, int __user *optlen);
 extern int	   dccp_setsockopt(struct sock *sk, int level, int optname,
@@ -249,6 +253,13 @@ extern int	   dccp_recvmsg(struct kiocb *iocb, struct sock *sk,
 				struct msghdr *msg, size_t len, int nonblock,
 				int flags, int *addr_len);
 extern void	   dccp_shutdown(struct sock *sk, int how);
+extern int	   inet_dccp_listen(struct socket *sock, int backlog);
+extern unsigned int dccp_poll(struct file *file, struct socket *sock,
+			     poll_table *wait);
+extern void	   dccp_v4_send_check(struct sock *sk, int len,
+				      struct sk_buff *skb);
+extern int	   dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr,
+				   int addr_len);
 
 extern int	   dccp_v4_checksum(const struct sk_buff *skb,
 				    const u32 saddr, const u32 daddr);
@@ -256,6 +267,17 @@ extern int	   dccp_v4_checksum(const struct sk_buff *skb,
 extern int	   dccp_v4_send_reset(struct sock *sk,
 				      enum dccp_reset_codes code);
 extern void	   dccp_send_close(struct sock *sk, const int active);
+extern int	   dccp_invalid_packet(struct sk_buff *skb);
+
+static inline int dccp_bad_service_code(const struct sock *sk,
+					const __u32 service)
+{
+	const struct dccp_sock *dp = dccp_sk(sk);
+
+	if (dp->dccps_service == service)
+		return 0;
+	return !dccp_list_has_service(dp->dccps_service_list, service);
+}
 
 struct dccp_skb_cb {
 	__u8  dccpd_type:4;
diff --git a/net/dccp/diag.c b/net/dccp/diag.c
index f675d8e642d3..3f78c00e3822 100644
--- a/net/dccp/diag.c
+++ b/net/dccp/diag.c
@@ -28,7 +28,7 @@ static void dccp_get_info(struct sock *sk, struct tcp_info *info)
 	info->tcpi_retransmits	= icsk->icsk_retransmits;
 	info->tcpi_probes	= icsk->icsk_probes_out;
 	info->tcpi_backoff	= icsk->icsk_backoff;
-	info->tcpi_pmtu		= dp->dccps_pmtu_cookie;
+	info->tcpi_pmtu		= icsk->icsk_pmtu_cookie;
 
 	if (dp->dccps_options.dccpo_send_ack_vector)
 		info->tcpi_options |= TCPI_OPT_SACK;
diff --git a/net/dccp/input.c b/net/dccp/input.c
index 3454d5941900..b6cba72b44e8 100644
--- a/net/dccp/input.c
+++ b/net/dccp/input.c
@@ -151,29 +151,12 @@ static int dccp_check_seqno(struct sock *sk, struct sk_buff *skb)
 	return 0;
 }
 
-int dccp_rcv_established(struct sock *sk, struct sk_buff *skb,
-			 const struct dccp_hdr *dh, const unsigned len)
+static inline int __dccp_rcv_established(struct sock *sk, struct sk_buff *skb,
+					 const struct dccp_hdr *dh,
+					 const unsigned len)
 {
 	struct dccp_sock *dp = dccp_sk(sk);
 
-	if (dccp_check_seqno(sk, skb))
-		goto discard;
-
-	if (dccp_parse_options(sk, skb))
-		goto discard;
-
-	if (DCCP_SKB_CB(skb)->dccpd_ack_seq != DCCP_PKT_WITHOUT_ACK_SEQ)
-		dccp_event_ack_recv(sk, skb);
-
-	if (dp->dccps_options.dccpo_send_ack_vector &&
-	    dccp_ackvec_add(dp->dccps_hc_rx_ackvec, sk,
-			    DCCP_SKB_CB(skb)->dccpd_seq,
-			    DCCP_ACKVEC_STATE_RECEIVED))
-		goto discard;
-
-	ccid_hc_rx_packet_recv(dp->dccps_hc_rx_ccid, sk, skb);
-	ccid_hc_tx_packet_recv(dp->dccps_hc_tx_ccid, sk, skb);
-
 	switch (dccp_hdr(skb)->dccph_type) {
 	case DCCP_PKT_DATAACK:
 	case DCCP_PKT_DATA:
@@ -250,6 +233,37 @@ discard:
 	return 0;
 }
 
+int dccp_rcv_established(struct sock *sk, struct sk_buff *skb,
+			 const struct dccp_hdr *dh, const unsigned len)
+{
+	struct dccp_sock *dp = dccp_sk(sk);
+
+	if (dccp_check_seqno(sk, skb))
+		goto discard;
+
+	if (dccp_parse_options(sk, skb))
+		goto discard;
+
+	if (DCCP_SKB_CB(skb)->dccpd_ack_seq != DCCP_PKT_WITHOUT_ACK_SEQ)
+		dccp_event_ack_recv(sk, skb);
+
+	if (dp->dccps_options.dccpo_send_ack_vector &&
+	    dccp_ackvec_add(dp->dccps_hc_rx_ackvec, sk,
+			    DCCP_SKB_CB(skb)->dccpd_seq,
+			    DCCP_ACKVEC_STATE_RECEIVED))
+		goto discard;
+
+	ccid_hc_rx_packet_recv(dp->dccps_hc_rx_ccid, sk, skb);
+	ccid_hc_tx_packet_recv(dp->dccps_hc_tx_ccid, sk, skb);
+
+	return __dccp_rcv_established(sk, skb, dh, len);
+discard:
+	__kfree_skb(skb);
+	return 0;
+}
+
+EXPORT_SYMBOL_GPL(dccp_rcv_established);
+
 static int dccp_rcv_request_sent_state_process(struct sock *sk,
 					       struct sk_buff *skb,
 					       const struct dccp_hdr *dh,
@@ -286,6 +300,12 @@ static int dccp_rcv_request_sent_state_process(struct sock *sk,
 			goto out_invalid_packet;
 		}
 
+                if (dp->dccps_options.dccpo_send_ack_vector &&
+                    dccp_ackvec_add(dp->dccps_hc_rx_ackvec, sk,
+                                    DCCP_SKB_CB(skb)->dccpd_seq,
+                                    DCCP_ACKVEC_STATE_RECEIVED))
+                        goto out_invalid_packet; /* FIXME: change error code */
+
 		dp->dccps_isr = DCCP_SKB_CB(skb)->dccpd_seq;
 		dccp_update_gsr(sk, dp->dccps_isr);
 		/*
@@ -309,7 +329,7 @@ static int dccp_rcv_request_sent_state_process(struct sock *sk,
 			goto out_invalid_packet;
 		}
 
-		dccp_sync_mss(sk, dp->dccps_pmtu_cookie);
+		dccp_sync_mss(sk, icsk->icsk_pmtu_cookie);
 
 		/*
 		 *    Step 10: Process REQUEST state (second part)
@@ -329,7 +349,7 @@ static int dccp_rcv_request_sent_state_process(struct sock *sk,
 		dccp_set_state(sk, DCCP_PARTOPEN);
 
 		/* Make sure socket is routed, for correct metrics. */
-		inet_sk_rebuild_header(sk);
+		icsk->icsk_af_ops->rebuild_header(sk);
 
 		if (!sock_flag(sk, SOCK_DEAD)) {
 			sk->sk_state_change(sk);
@@ -398,9 +418,9 @@ static int dccp_rcv_respond_partopen_state_process(struct sock *sk,
 
 		if (dh->dccph_type == DCCP_PKT_DATAACK ||
 		    dh->dccph_type == DCCP_PKT_DATA) {
-			dccp_rcv_established(sk, skb, dh, len);
+			__dccp_rcv_established(sk, skb, dh, len);
 			queued = 1; /* packet was queued
-				       (by dccp_rcv_established) */
+				       (by __dccp_rcv_established) */
 		}
 		break;
 	}
@@ -444,7 +464,8 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
 	 */
 	if (sk->sk_state == DCCP_LISTEN) {
 		if (dh->dccph_type == DCCP_PKT_REQUEST) {
-			if (dccp_v4_conn_request(sk, skb) < 0)
+			if (inet_csk(sk)->icsk_af_ops->conn_request(sk,
+								    skb) < 0)
 				return 1;
 
 			/* FIXME: do congestion control initialization */
@@ -471,14 +492,14 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
 		if (dcb->dccpd_ack_seq != DCCP_PKT_WITHOUT_ACK_SEQ)
 			dccp_event_ack_recv(sk, skb);
 
-		ccid_hc_rx_packet_recv(dp->dccps_hc_rx_ccid, sk, skb);
-		ccid_hc_tx_packet_recv(dp->dccps_hc_tx_ccid, sk, skb);
-
  		if (dp->dccps_options.dccpo_send_ack_vector &&
 		    dccp_ackvec_add(dp->dccps_hc_rx_ackvec, sk,
  				    DCCP_SKB_CB(skb)->dccpd_seq,
  				    DCCP_ACKVEC_STATE_RECEIVED))
  			goto discard;
+
+		ccid_hc_rx_packet_recv(dp->dccps_hc_rx_ccid, sk, skb);
+		ccid_hc_tx_packet_recv(dp->dccps_hc_tx_ccid, sk, skb);
 	}
 
 	/*
@@ -566,3 +587,5 @@ discard:
 	}
 	return 0;
 }
+
+EXPORT_SYMBOL_GPL(dccp_rcv_state_process);
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index 656e13e38cfb..3f244670764a 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -19,7 +19,9 @@
 
 #include <net/icmp.h>
 #include <net/inet_hashtables.h>
+#include <net/inet_sock.h>
 #include <net/sock.h>
+#include <net/timewait_sock.h>
 #include <net/tcp_states.h>
 #include <net/xfrm.h>
 
@@ -37,7 +39,8 @@ EXPORT_SYMBOL_GPL(dccp_hashinfo);
 
 static int dccp_v4_get_port(struct sock *sk, const unsigned short snum)
 {
-	return inet_csk_get_port(&dccp_hashinfo, sk, snum);
+	return inet_csk_get_port(&dccp_hashinfo, sk, snum,
+				 inet_csk_bind_conflict);
 }
 
 static void dccp_v4_hash(struct sock *sk)
@@ -45,171 +48,14 @@ static void dccp_v4_hash(struct sock *sk)
 	inet_hash(&dccp_hashinfo, sk);
 }
 
-static void dccp_v4_unhash(struct sock *sk)
+void dccp_unhash(struct sock *sk)
 {
 	inet_unhash(&dccp_hashinfo, sk);
 }
 
-/* called with local bh disabled */
-static int __dccp_v4_check_established(struct sock *sk, const __u16 lport,
-				      struct inet_timewait_sock **twp)
-{
-	struct inet_sock *inet = inet_sk(sk);
-	const u32 daddr = inet->rcv_saddr;
-	const u32 saddr = inet->daddr;
-	const int dif = sk->sk_bound_dev_if;
-	INET_ADDR_COOKIE(acookie, saddr, daddr)
-	const __u32 ports = INET_COMBINED_PORTS(inet->dport, lport);
-	unsigned int hash = inet_ehashfn(daddr, lport, saddr, inet->dport);
-	struct inet_ehash_bucket *head = inet_ehash_bucket(&dccp_hashinfo, hash);
-	const struct sock *sk2;
-	const struct hlist_node *node;
-	struct inet_timewait_sock *tw;
-
-	prefetch(head->chain.first);
-	write_lock(&head->lock);
-
-	/* Check TIME-WAIT sockets first. */
-	sk_for_each(sk2, node, &(head + dccp_hashinfo.ehash_size)->chain) {
-		tw = inet_twsk(sk2);
-
-		if (INET_TW_MATCH(sk2, hash, acookie, saddr, daddr, ports, dif))
-			goto not_unique;
-	}
-	tw = NULL;
-
-	/* And established part... */
-	sk_for_each(sk2, node, &head->chain) {
-		if (INET_MATCH(sk2, hash, acookie, saddr, daddr, ports, dif))
-			goto not_unique;
-	}
+EXPORT_SYMBOL_GPL(dccp_unhash);
 
-	/* Must record num and sport now. Otherwise we will see
-	 * in hash table socket with a funny identity. */
-	inet->num = lport;
-	inet->sport = htons(lport);
-	sk->sk_hash = hash;
-	BUG_TRAP(sk_unhashed(sk));
-	__sk_add_node(sk, &head->chain);
-	sock_prot_inc_use(sk->sk_prot);
-	write_unlock(&head->lock);
-
-	if (twp != NULL) {
-		*twp = tw;
-		NET_INC_STATS_BH(LINUX_MIB_TIMEWAITRECYCLED);
-	} else if (tw != NULL) {
-		/* Silly. Should hash-dance instead... */
-		inet_twsk_deschedule(tw, &dccp_death_row);
-		NET_INC_STATS_BH(LINUX_MIB_TIMEWAITRECYCLED);
-
-		inet_twsk_put(tw);
-	}
-
-	return 0;
-
-not_unique:
-	write_unlock(&head->lock);
-	return -EADDRNOTAVAIL;
-}
-
-/*
- * Bind a port for a connect operation and hash it.
- */
-static int dccp_v4_hash_connect(struct sock *sk)
-{
-	const unsigned short snum = inet_sk(sk)->num;
- 	struct inet_bind_hashbucket *head;
- 	struct inet_bind_bucket *tb;
-	int ret;
-
- 	if (snum == 0) {
- 		int low = sysctl_local_port_range[0];
- 		int high = sysctl_local_port_range[1];
- 		int remaining = (high - low) + 1;
- 		int rover = net_random() % (high - low) + low;
-		struct hlist_node *node;
- 		struct inet_timewait_sock *tw = NULL;
-
- 		local_bh_disable();
- 		do {
- 			head = &dccp_hashinfo.bhash[inet_bhashfn(rover,
-						    dccp_hashinfo.bhash_size)];
- 			spin_lock(&head->lock);
-
- 			/* Does not bother with rcv_saddr checks,
- 			 * because the established check is already
- 			 * unique enough.
- 			 */
-			inet_bind_bucket_for_each(tb, node, &head->chain) {
- 				if (tb->port == rover) {
- 					BUG_TRAP(!hlist_empty(&tb->owners));
- 					if (tb->fastreuse >= 0)
- 						goto next_port;
- 					if (!__dccp_v4_check_established(sk,
-									 rover,
-									 &tw))
- 						goto ok;
- 					goto next_port;
- 				}
- 			}
-
- 			tb = inet_bind_bucket_create(dccp_hashinfo.bind_bucket_cachep,
-						     head, rover);
- 			if (tb == NULL) {
- 				spin_unlock(&head->lock);
- 				break;
- 			}
- 			tb->fastreuse = -1;
- 			goto ok;
-
- 		next_port:
- 			spin_unlock(&head->lock);
- 			if (++rover > high)
- 				rover = low;
- 		} while (--remaining > 0);
-
- 		local_bh_enable();
-
- 		return -EADDRNOTAVAIL;
-
-ok:
- 		/* All locks still held and bhs disabled */
- 		inet_bind_hash(sk, tb, rover);
-		if (sk_unhashed(sk)) {
- 			inet_sk(sk)->sport = htons(rover);
- 			__inet_hash(&dccp_hashinfo, sk, 0);
- 		}
- 		spin_unlock(&head->lock);
-
- 		if (tw != NULL) {
- 			inet_twsk_deschedule(tw, &dccp_death_row);
- 			inet_twsk_put(tw);
- 		}
-
-		ret = 0;
-		goto out;
- 	}
-
- 	head = &dccp_hashinfo.bhash[inet_bhashfn(snum,
-						 dccp_hashinfo.bhash_size)];
- 	tb   = inet_csk(sk)->icsk_bind_hash;
-	spin_lock_bh(&head->lock);
-	if (sk_head(&tb->owners) == sk && sk->sk_bind_node.next == NULL) {
-		__inet_hash(&dccp_hashinfo, sk, 0);
-		spin_unlock_bh(&head->lock);
-		return 0;
-	} else {
-		spin_unlock(&head->lock);
-		/* No definite answer... Walk to established hash table */
-		ret = __dccp_v4_check_established(sk, snum, NULL);
-out:
-		local_bh_enable();
-		return ret;
-	}
-}
-
-static int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr,
-			   int addr_len)
+int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 {
 	struct inet_sock *inet = inet_sk(sk);
 	struct dccp_sock *dp = dccp_sk(sk);
@@ -259,9 +105,9 @@ static int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr,
 	inet->dport = usin->sin_port;
 	inet->daddr = daddr;
 
-	dp->dccps_ext_header_len = 0;
+	inet_csk(sk)->icsk_ext_hdr_len = 0;
 	if (inet->opt != NULL)
-		dp->dccps_ext_header_len = inet->opt->optlen;
+		inet_csk(sk)->icsk_ext_hdr_len = inet->opt->optlen;
 	/*
 	 * Socket identity is still unknown (sport may be zero).
 	 * However we set state to DCCP_REQUESTING and not releasing socket
@@ -269,7 +115,7 @@ static int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr,
 	 * complete initialization after this.
 	 */
 	dccp_set_state(sk, DCCP_REQUESTING);
-	err = dccp_v4_hash_connect(sk);
+	err = inet_hash_connect(&dccp_death_row, sk);
 	if (err != 0)
 		goto failure;
 
@@ -287,16 +133,6 @@ static int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr,
 							    usin->sin_port);
 	dccp_update_gss(sk, dp->dccps_iss);
 
-	/*
-	 * SWL and AWL are initially adjusted so that they are not less than
-	 * the initial Sequence Numbers received and sent, respectively:
-	 *	SWL := max(GSR + 1 - floor(W/4), ISR),
-	 *	AWL := max(GSS - W' + 1, ISS).
-	 * These adjustments MUST be applied only at the beginning of the
-	 * connection.
-	 */
-	dccp_set_seqno(&dp->dccps_awl, max48(dp->dccps_awl, dp->dccps_iss));
-
 	inet->id = dp->dccps_iss ^ jiffies;
 
 	err = dccp_connect(sk);
@@ -316,6 +152,8 @@ failure:
 	goto out;
 }
 
+EXPORT_SYMBOL_GPL(dccp_v4_connect);
+
 /*
  * This routine does path mtu discovery as defined in RFC1191.
  */
@@ -354,7 +192,7 @@ static inline void dccp_do_pmtu_discovery(struct sock *sk,
 	mtu = dst_mtu(dst);
 
 	if (inet->pmtudisc != IP_PMTUDISC_DONT &&
-	    dp->dccps_pmtu_cookie > mtu) {
+	    inet_csk(sk)->icsk_pmtu_cookie > mtu) {
 		dccp_sync_mss(sk, mtu);
 
 		/*
@@ -606,6 +444,17 @@ out:
 	sock_put(sk);
 }
 
+/* This routine computes an IPv4 DCCP checksum. */
+void dccp_v4_send_check(struct sock *sk, int len, struct sk_buff *skb)
+{
+	const struct inet_sock *inet = inet_sk(sk);
+	struct dccp_hdr *dh = dccp_hdr(skb);
+
+	dh->dccph_checksum = dccp_v4_checksum(skb, inet->saddr, inet->daddr);
+}
+
+EXPORT_SYMBOL_GPL(dccp_v4_send_check);
+
 int dccp_v4_send_reset(struct sock *sk, enum dccp_reset_codes code)
 {
 	struct sk_buff *skb;
@@ -641,16 +490,6 @@ static inline u64 dccp_v4_init_sequence(const struct sock *sk,
 					   dccp_hdr(skb)->dccph_sport);
 }
 
-static inline int dccp_bad_service_code(const struct sock *sk,
-					const __u32 service)
-{
-	const struct dccp_sock *dp = dccp_sk(sk);
-
-	if (dp->dccps_service == service)
-		return 0;
-	return !dccp_list_has_service(dp->dccps_service_list, service);
-}
-
 int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
 {
 	struct inet_request_sock *ireq;
@@ -662,7 +501,6 @@ int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
  	const __u32 service = dccp_hdr_request(skb)->dccph_req_service;
 	struct dccp_skb_cb *dcb = DCCP_SKB_CB(skb);
 	__u8 reset_code = DCCP_RESET_CODE_TOO_BUSY;
-	struct dst_entry *dst = NULL;
 
 	/* Never answer to DCCP_PKT_REQUESTs send to broadcast or multicast */
 	if (((struct rtable *)skb->dst)->rt_flags &
@@ -703,7 +541,6 @@ int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
 	ireq = inet_rsk(req);
 	ireq->loc_addr = daddr;
 	ireq->rmt_addr = saddr;
-	/* FIXME: Merge Aristeu's option parsing code when ready */
 	req->rcv_wnd	= 100; /* Fake, option parsing will get the
 				  right value */
 	ireq->opt	= NULL;
@@ -721,23 +558,22 @@ int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
 	dreq->dreq_iss	   = dccp_v4_init_sequence(sk, skb);
 	dreq->dreq_service = service;
 
-	if (dccp_v4_send_response(sk, req, dst))
+	if (dccp_v4_send_response(sk, req, NULL))
 		goto drop_and_free;
 
 	inet_csk_reqsk_queue_hash_add(sk, req, DCCP_TIMEOUT_INIT);
 	return 0;
 
 drop_and_free:
-	/*
-	 * FIXME: should be reqsk_free after implementing req->rsk_ops
-	 */
-	__reqsk_free(req);
+	reqsk_free(req);
 drop:
 	DCCP_INC_STATS_BH(DCCP_MIB_ATTEMPTFAILS);
 	dcb->dccpd_reset_code = reset_code;
 	return -1;
 }
 
+EXPORT_SYMBOL_GPL(dccp_v4_conn_request);
+
 /*
  * The three way handshake has completed - we got a valid ACK or DATAACK -
  * now create the new socket.
@@ -792,6 +628,8 @@ exit:
 	return NULL;
 }
 
+EXPORT_SYMBOL_GPL(dccp_v4_request_recv_sock);
+
 static struct sock *dccp_v4_hnd_req(struct sock *sk, struct sk_buff *skb)
 {
 	const struct dccp_hdr *dh = dccp_hdr(skb);
@@ -1011,7 +849,9 @@ discard:
 	return 0;
 }
 
-static inline int dccp_invalid_packet(struct sk_buff *skb)
+EXPORT_SYMBOL_GPL(dccp_v4_do_rcv);
+
+int dccp_invalid_packet(struct sk_buff *skb)
 {
 	const struct dccp_hdr *dh;
 
@@ -1065,29 +905,30 @@ static inline int dccp_invalid_packet(struct sk_buff *skb)
 		return 1;
 	}
 
-	/* If the header checksum is incorrect, drop packet and return */
-	if (dccp_v4_verify_checksum(skb, skb->nh.iph->saddr,
-				    skb->nh.iph->daddr) < 0) {
-		LIMIT_NETDEBUG(KERN_WARNING "DCCP: header checksum is "
-					    "incorrect\n");
-		return 1;
-	}
-
 	return 0;
 }
 
+EXPORT_SYMBOL_GPL(dccp_invalid_packet);
+
 /* this is called when real data arrives */
 int dccp_v4_rcv(struct sk_buff *skb)
 {
 	const struct dccp_hdr *dh;
 	struct sock *sk;
-	int rc;
 
 	/* Step 1: Check header basics: */
 
 	if (dccp_invalid_packet(skb))
 		goto discard_it;
 
+	/* If the header checksum is incorrect, drop packet and return */
+	if (dccp_v4_verify_checksum(skb, skb->nh.iph->saddr,
+				    skb->nh.iph->daddr) < 0) {
+		LIMIT_NETDEBUG(KERN_WARNING "%s: incorrect header checksum\n",
+			       __FUNCTION__);
+		goto discard_it;
+	}
+
 	dh = dccp_hdr(skb);
 
 	DCCP_SKB_CB(skb)->dccpd_seq  = dccp_hdr_seq(skb);
@@ -1143,28 +984,10 @@ int dccp_v4_rcv(struct sk_buff *skb)
                 goto do_time_wait;
 	}
 
-	if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) {
-		dccp_pr_debug("xfrm4_policy_check failed\n");
+	if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb))
 		goto discard_and_relse;
-	}
-
-        if (sk_filter(sk, skb, 0)) {
-		dccp_pr_debug("sk_filter failed\n");
-                goto discard_and_relse;
-	}
-
-	skb->dev = NULL;
-
-	bh_lock_sock(sk);
-	rc = 0;
-	if (!sock_owned_by_user(sk))
-		rc = dccp_v4_do_rcv(sk, skb);
-	else
-		sk_add_backlog(sk, skb);
-	bh_unlock_sock(sk);
 
-	sock_put(sk);
-	return rc;
+	return sk_receive_skb(sk, skb);
 
 no_dccp_socket:
 	if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb))
@@ -1194,9 +1017,23 @@ do_time_wait:
 	goto no_dccp_socket;
 }
 
-static int dccp_v4_init_sock(struct sock *sk)
+struct inet_connection_sock_af_ops dccp_ipv4_af_ops = {
+	.queue_xmit	= ip_queue_xmit,
+	.send_check	= dccp_v4_send_check,
+	.rebuild_header	= inet_sk_rebuild_header,
+	.conn_request	= dccp_v4_conn_request,
+	.syn_recv_sock	= dccp_v4_request_recv_sock,
+	.net_header_len	= sizeof(struct iphdr),
+	.setsockopt	= ip_setsockopt,
+	.getsockopt	= ip_getsockopt,
+	.addr2sockaddr	= inet_csk_addr2sockaddr,
+	.sockaddr_len	= sizeof(struct sockaddr_in),
+};
+
+int dccp_v4_init_sock(struct sock *sk)
 {
 	struct dccp_sock *dp = dccp_sk(sk);
+	struct inet_connection_sock *icsk = inet_csk(sk);
 	static int dccp_ctl_socket_init = 1;
 
 	dccp_options_init(&dp->dccps_options);
@@ -1236,9 +1073,11 @@ static int dccp_v4_init_sock(struct sock *sk)
 		dccp_ctl_socket_init = 0;
 
 	dccp_init_xmit_timers(sk);
-	inet_csk(sk)->icsk_rto = DCCP_TIMEOUT_INIT;
+	icsk->icsk_rto = DCCP_TIMEOUT_INIT;
 	sk->sk_state = DCCP_CLOSED;
 	sk->sk_write_space = dccp_write_space;
+	icsk->icsk_af_ops = &dccp_ipv4_af_ops;
+	icsk->icsk_sync_mss = dccp_sync_mss;
 	dp->dccps_mss_cache = 536;
 	dp->dccps_role = DCCP_ROLE_UNDEFINED;
 	dp->dccps_service = DCCP_SERVICE_INVALID_VALUE;
@@ -1246,7 +1085,9 @@ static int dccp_v4_init_sock(struct sock *sk)
 	return 0;
 }
 
-static int dccp_v4_destroy_sock(struct sock *sk)
+EXPORT_SYMBOL_GPL(dccp_v4_init_sock);
+
+int dccp_v4_destroy_sock(struct sock *sk)
 {
 	struct dccp_sock *dp = dccp_sk(sk);
 
@@ -1279,6 +1120,8 @@ static int dccp_v4_destroy_sock(struct sock *sk)
 	return 0;
 }
 
+EXPORT_SYMBOL_GPL(dccp_v4_destroy_sock);
+
 static void dccp_v4_reqsk_destructor(struct request_sock *req)
 {
 	kfree(inet_rsk(req)->opt);
@@ -1293,7 +1136,11 @@ static struct request_sock_ops dccp_request_sock_ops = {
 	.send_reset	= dccp_v4_ctl_send_reset,
 };
 
-struct proto dccp_v4_prot = {
+static struct timewait_sock_ops dccp_timewait_sock_ops = {
+	.twsk_obj_size	= sizeof(struct inet_timewait_sock),
+};
+
+struct proto dccp_prot = {
 	.name			= "DCCP",
 	.owner			= THIS_MODULE,
 	.close			= dccp_close,
@@ -1307,7 +1154,7 @@ struct proto dccp_v4_prot = {
 	.recvmsg		= dccp_recvmsg,
 	.backlog_rcv		= dccp_v4_do_rcv,
 	.hash			= dccp_v4_hash,
-	.unhash			= dccp_v4_unhash,
+	.unhash			= dccp_unhash,
 	.accept			= inet_csk_accept,
 	.get_port		= dccp_v4_get_port,
 	.shutdown		= dccp_shutdown,
@@ -1316,5 +1163,7 @@ struct proto dccp_v4_prot = {
 	.max_header		= MAX_DCCP_HEADER,
 	.obj_size		= sizeof(struct dccp_sock),
 	.rsk_prot		= &dccp_request_sock_ops,
-	.twsk_obj_size		= sizeof(struct inet_timewait_sock),
+	.twsk_prot		= &dccp_timewait_sock_ops,
 };
+
+EXPORT_SYMBOL_GPL(dccp_prot);
diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
new file mode 100644
index 000000000000..c609dc78f487
--- /dev/null
+++ b/net/dccp/ipv6.c
@@ -0,0 +1,1261 @@
+/*
+ *	DCCP over IPv6
+ *	Linux INET6 implementation 
+ *
+ *	Based on net/dccp6/ipv6.c
+ *
+ *	Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
+ *
+ *	This program is free software; you can redistribute it and/or
+ *      modify it under the terms of the GNU General Public License
+ *      as published by the Free Software Foundation; either version
+ *      2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/random.h>
+#include <linux/xfrm.h>
+
+#include <net/addrconf.h>
+#include <net/inet_common.h>
+#include <net/inet_hashtables.h>
+#include <net/inet_sock.h>
+#include <net/inet6_connection_sock.h>
+#include <net/inet6_hashtables.h>
+#include <net/ip6_route.h>
+#include <net/ipv6.h>
+#include <net/protocol.h>
+#include <net/transp_v6.h>
+#include <net/xfrm.h>
+
+#include "dccp.h"
+#include "ipv6.h"
+
+static void dccp_v6_ctl_send_reset(struct sk_buff *skb);
+static void dccp_v6_reqsk_send_ack(struct sk_buff *skb,
+				   struct request_sock *req);
+static void dccp_v6_send_check(struct sock *sk, int len, struct sk_buff *skb);
+
+static int dccp_v6_do_rcv(struct sock *sk, struct sk_buff *skb);
+
+static struct inet_connection_sock_af_ops dccp_ipv6_mapped;
+static struct inet_connection_sock_af_ops dccp_ipv6_af_ops;
+
+static int dccp_v6_get_port(struct sock *sk, unsigned short snum)
+{
+	return inet_csk_get_port(&dccp_hashinfo, sk, snum,
+				 inet6_csk_bind_conflict);
+}
+
+static void dccp_v6_hash(struct sock *sk)
+{
+	if (sk->sk_state != DCCP_CLOSED) {
+		if (inet_csk(sk)->icsk_af_ops == &dccp_ipv6_mapped) {
+			dccp_prot.hash(sk);
+			return;
+		}
+		local_bh_disable();
+		__inet6_hash(&dccp_hashinfo, sk);
+		local_bh_enable();
+	}
+}
+
+static inline u16 dccp_v6_check(struct dccp_hdr *dh, int len,
+				struct in6_addr *saddr, 
+				struct in6_addr *daddr, 
+				unsigned long base)
+{
+	return csum_ipv6_magic(saddr, daddr, len, IPPROTO_DCCP, base);
+}
+
+static __u32 dccp_v6_init_sequence(struct sock *sk, struct sk_buff *skb)
+{
+	const struct dccp_hdr *dh = dccp_hdr(skb);
+
+	if (skb->protocol == htons(ETH_P_IPV6))
+		return secure_tcpv6_sequence_number(skb->nh.ipv6h->daddr.s6_addr32,
+						    skb->nh.ipv6h->saddr.s6_addr32,
+						    dh->dccph_dport,
+						    dh->dccph_sport);
+	else
+		return secure_dccp_sequence_number(skb->nh.iph->daddr,
+						   skb->nh.iph->saddr,
+						   dh->dccph_dport,
+						   dh->dccph_sport);
+}
+
+static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr, 
+			   int addr_len)
+{
+	struct sockaddr_in6 *usin = (struct sockaddr_in6 *) uaddr;
+	struct inet_connection_sock *icsk = inet_csk(sk);
+	struct inet_sock *inet = inet_sk(sk);
+	struct ipv6_pinfo *np = inet6_sk(sk);
+	struct dccp_sock *dp = dccp_sk(sk);
+	struct in6_addr *saddr = NULL, *final_p = NULL, final;
+	struct flowi fl;
+	struct dst_entry *dst;
+	int addr_type;
+	int err;
+
+	dp->dccps_role = DCCP_ROLE_CLIENT;
+
+	if (addr_len < SIN6_LEN_RFC2133) 
+		return -EINVAL;
+
+	if (usin->sin6_family != AF_INET6) 
+		return -EAFNOSUPPORT;
+
+	memset(&fl, 0, sizeof(fl));
+
+	if (np->sndflow) {
+		fl.fl6_flowlabel = usin->sin6_flowinfo & IPV6_FLOWINFO_MASK;
+		IP6_ECN_flow_init(fl.fl6_flowlabel);
+		if (fl.fl6_flowlabel & IPV6_FLOWLABEL_MASK) {
+			struct ip6_flowlabel *flowlabel;
+			flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
+			if (flowlabel == NULL)
+				return -EINVAL;
+			ipv6_addr_copy(&usin->sin6_addr, &flowlabel->dst);
+			fl6_sock_release(flowlabel);
+		}
+	}
+
+	/*
+  	 *	connect() to INADDR_ANY means loopback (BSD'ism).
+  	 */
+  	
+  	if (ipv6_addr_any(&usin->sin6_addr))
+		usin->sin6_addr.s6_addr[15] = 0x1; 
+
+	addr_type = ipv6_addr_type(&usin->sin6_addr);
+
+	if(addr_type & IPV6_ADDR_MULTICAST)
+		return -ENETUNREACH;
+
+	if (addr_type & IPV6_ADDR_LINKLOCAL) {
+		if (addr_len >= sizeof(struct sockaddr_in6) &&
+		    usin->sin6_scope_id) {
+			/* If interface is set while binding, indices
+			 * must coincide.
+			 */
+			if (sk->sk_bound_dev_if &&
+			    sk->sk_bound_dev_if != usin->sin6_scope_id)
+				return -EINVAL;
+
+			sk->sk_bound_dev_if = usin->sin6_scope_id;
+		}
+
+		/* Connect to link-local address requires an interface */
+		if (!sk->sk_bound_dev_if)
+			return -EINVAL;
+	}
+
+	ipv6_addr_copy(&np->daddr, &usin->sin6_addr);
+	np->flow_label = fl.fl6_flowlabel;
+
+	/*
+	 *	DCCP over IPv4
+	 */
+
+	if (addr_type == IPV6_ADDR_MAPPED) {
+		u32 exthdrlen = icsk->icsk_ext_hdr_len;
+		struct sockaddr_in sin;
+
+		SOCK_DEBUG(sk, "connect: ipv4 mapped\n");
+
+		if (__ipv6_only_sock(sk))
+			return -ENETUNREACH;
+
+		sin.sin_family = AF_INET;
+		sin.sin_port = usin->sin6_port;
+		sin.sin_addr.s_addr = usin->sin6_addr.s6_addr32[3];
+
+		icsk->icsk_af_ops = &dccp_ipv6_mapped;
+		sk->sk_backlog_rcv = dccp_v4_do_rcv;
+
+		err = dccp_v4_connect(sk, (struct sockaddr *)&sin, sizeof(sin));
+
+		if (err) {
+			icsk->icsk_ext_hdr_len = exthdrlen;
+			icsk->icsk_af_ops = &dccp_ipv6_af_ops;
+			sk->sk_backlog_rcv = dccp_v6_do_rcv;
+			goto failure;
+		} else {
+			ipv6_addr_set(&np->saddr, 0, 0, htonl(0x0000FFFF),
+				      inet->saddr);
+			ipv6_addr_set(&np->rcv_saddr, 0, 0, htonl(0x0000FFFF),
+				      inet->rcv_saddr);
+		}
+
+		return err;
+	}
+
+	if (!ipv6_addr_any(&np->rcv_saddr))
+		saddr = &np->rcv_saddr;
+
+	fl.proto = IPPROTO_DCCP;
+	ipv6_addr_copy(&fl.fl6_dst, &np->daddr);
+	ipv6_addr_copy(&fl.fl6_src, saddr ? saddr : &np->saddr);
+	fl.oif = sk->sk_bound_dev_if;
+	fl.fl_ip_dport = usin->sin6_port;
+	fl.fl_ip_sport = inet->sport;
+
+	if (np->opt && np->opt->srcrt) {
+		struct rt0_hdr *rt0 = (struct rt0_hdr *)np->opt->srcrt;
+		ipv6_addr_copy(&final, &fl.fl6_dst);
+		ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
+		final_p = &final;
+	}
+
+	err = ip6_dst_lookup(sk, &dst, &fl);
+	if (err)
+		goto failure;
+	if (final_p)
+		ipv6_addr_copy(&fl.fl6_dst, final_p);
+
+	if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0)
+		goto failure;
+
+	if (saddr == NULL) {
+		saddr = &fl.fl6_src;
+		ipv6_addr_copy(&np->rcv_saddr, saddr);
+	}
+
+	/* set the source address */
+	ipv6_addr_copy(&np->saddr, saddr);
+	inet->rcv_saddr = LOOPBACK4_IPV6;
+
+	ip6_dst_store(sk, dst, NULL);
+
+	icsk->icsk_ext_hdr_len = 0;
+	if (np->opt)
+		icsk->icsk_ext_hdr_len = (np->opt->opt_flen +
+					  np->opt->opt_nflen);
+
+	inet->dport = usin->sin6_port;
+
+	dccp_set_state(sk, DCCP_REQUESTING);
+	err = inet6_hash_connect(&dccp_death_row, sk);
+	if (err)
+		goto late_failure;
+	/* FIXME */
+#if 0
+	dp->dccps_gar = secure_dccp_v6_sequence_number(np->saddr.s6_addr32,
+						       np->daddr.s6_addr32,
+						       inet->sport,
+						       inet->dport);
+#endif
+	err = dccp_connect(sk);
+	if (err)
+		goto late_failure;
+
+	return 0;
+
+late_failure:
+	dccp_set_state(sk, DCCP_CLOSED);
+	__sk_dst_reset(sk);
+failure:
+	inet->dport = 0;
+	sk->sk_route_caps = 0;
+	return err;
+}
+
+static void dccp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
+			int type, int code, int offset, __u32 info)
+{
+	struct ipv6hdr *hdr = (struct ipv6hdr *)skb->data;
+	const struct dccp_hdr *dh = (struct dccp_hdr *)(skb->data + offset);
+	struct ipv6_pinfo *np;
+	struct sock *sk;
+	int err;
+	__u64 seq;
+
+	sk = inet6_lookup(&dccp_hashinfo, &hdr->daddr, dh->dccph_dport,
+			  &hdr->saddr, dh->dccph_sport, skb->dev->ifindex);
+
+	if (sk == NULL) {
+		ICMP6_INC_STATS_BH(__in6_dev_get(skb->dev), ICMP6_MIB_INERRORS);
+		return;
+	}
+
+	if (sk->sk_state == DCCP_TIME_WAIT) {
+		inet_twsk_put((struct inet_timewait_sock *)sk);
+		return;
+	}
+
+	bh_lock_sock(sk);
+	if (sock_owned_by_user(sk))
+		NET_INC_STATS_BH(LINUX_MIB_LOCKDROPPEDICMPS);
+
+	if (sk->sk_state == DCCP_CLOSED)
+		goto out;
+
+	np = inet6_sk(sk);
+
+	if (type == ICMPV6_PKT_TOOBIG) {
+		struct dst_entry *dst = NULL;
+
+		if (sock_owned_by_user(sk))
+			goto out;
+		if ((1 << sk->sk_state) & (DCCPF_LISTEN | DCCPF_CLOSED))
+			goto out;
+
+		/* icmp should have updated the destination cache entry */
+		dst = __sk_dst_check(sk, np->dst_cookie);
+
+		if (dst == NULL) {
+			struct inet_sock *inet = inet_sk(sk);
+			struct flowi fl;
+
+			/* BUGGG_FUTURE: Again, it is not clear how
+			   to handle rthdr case. Ignore this complexity
+			   for now.
+			 */
+			memset(&fl, 0, sizeof(fl));
+			fl.proto = IPPROTO_DCCP;
+			ipv6_addr_copy(&fl.fl6_dst, &np->daddr);
+			ipv6_addr_copy(&fl.fl6_src, &np->saddr);
+			fl.oif = sk->sk_bound_dev_if;
+			fl.fl_ip_dport = inet->dport;
+			fl.fl_ip_sport = inet->sport;
+
+			if ((err = ip6_dst_lookup(sk, &dst, &fl))) {
+				sk->sk_err_soft = -err;
+				goto out;
+			}
+
+			if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0) {
+				sk->sk_err_soft = -err;
+				goto out;
+			}
+
+		} else
+			dst_hold(dst);
+
+		if (inet_csk(sk)->icsk_pmtu_cookie > dst_mtu(dst)) {
+			dccp_sync_mss(sk, dst_mtu(dst));
+		} /* else let the usual retransmit timer handle it */
+		dst_release(dst);
+		goto out;
+	}
+
+	icmpv6_err_convert(type, code, &err);
+
+	seq = DCCP_SKB_CB(skb)->dccpd_seq;
+	/* Might be for an request_sock */
+	switch (sk->sk_state) {
+		struct request_sock *req, **prev;
+	case DCCP_LISTEN:
+		if (sock_owned_by_user(sk))
+			goto out;
+
+		req = inet6_csk_search_req(sk, &prev, dh->dccph_dport,
+					   &hdr->daddr, &hdr->saddr,
+					   inet6_iif(skb));
+		if (!req)
+			goto out;
+
+		/* ICMPs are not backlogged, hence we cannot get
+		 * an established socket here.
+		 */
+		BUG_TRAP(req->sk == NULL);
+
+		if (seq != dccp_rsk(req)->dreq_iss) {
+			NET_INC_STATS_BH(LINUX_MIB_OUTOFWINDOWICMPS);
+			goto out;
+		}
+
+		inet_csk_reqsk_queue_drop(sk, req, prev);
+		goto out;
+
+	case DCCP_REQUESTING:
+	case DCCP_RESPOND:  /* Cannot happen.
+			       It can, it SYNs are crossed. --ANK */ 
+		if (!sock_owned_by_user(sk)) {
+			DCCP_INC_STATS_BH(DCCP_MIB_ATTEMPTFAILS);
+			sk->sk_err = err;
+			/*
+			 * Wake people up to see the error
+			 * (see connect in sock.c)
+			 */
+			sk->sk_error_report(sk);
+
+			dccp_done(sk);
+		} else
+			sk->sk_err_soft = err;
+		goto out;
+	}
+
+	if (!sock_owned_by_user(sk) && np->recverr) {
+		sk->sk_err = err;
+		sk->sk_error_report(sk);
+	} else
+		sk->sk_err_soft = err;
+
+out:
+	bh_unlock_sock(sk);
+	sock_put(sk);
+}
+
+
+static int dccp_v6_send_response(struct sock *sk, struct request_sock *req,
+				 struct dst_entry *dst)
+{
+	struct inet6_request_sock *ireq6 = inet6_rsk(req);
+	struct ipv6_pinfo *np = inet6_sk(sk);
+	struct sk_buff *skb;
+	struct ipv6_txoptions *opt = NULL;
+	struct in6_addr *final_p = NULL, final;
+	struct flowi fl;
+	int err = -1;
+
+	memset(&fl, 0, sizeof(fl));
+	fl.proto = IPPROTO_DCCP;
+	ipv6_addr_copy(&fl.fl6_dst, &ireq6->rmt_addr);
+	ipv6_addr_copy(&fl.fl6_src, &ireq6->loc_addr);
+	fl.fl6_flowlabel = 0;
+	fl.oif = ireq6->iif;
+	fl.fl_ip_dport = inet_rsk(req)->rmt_port;
+	fl.fl_ip_sport = inet_sk(sk)->sport;
+
+	if (dst == NULL) {
+		opt = np->opt;
+		if (opt == NULL &&
+		    np->rxopt.bits.osrcrt == 2 &&
+		    ireq6->pktopts) {
+			struct sk_buff *pktopts = ireq6->pktopts;
+			struct inet6_skb_parm *rxopt = IP6CB(pktopts);
+			if (rxopt->srcrt)
+				opt = ipv6_invert_rthdr(sk,
+					(struct ipv6_rt_hdr *)(pktopts->nh.raw +
+							       rxopt->srcrt));
+		}
+
+		if (opt && opt->srcrt) {
+			struct rt0_hdr *rt0 = (struct rt0_hdr *)opt->srcrt;
+			ipv6_addr_copy(&final, &fl.fl6_dst);
+			ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
+			final_p = &final;
+		}
+
+		err = ip6_dst_lookup(sk, &dst, &fl);
+		if (err)
+			goto done;
+		if (final_p)
+			ipv6_addr_copy(&fl.fl6_dst, final_p);
+		if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0)
+			goto done;
+	}
+
+	skb = dccp_make_response(sk, dst, req);
+	if (skb != NULL) {
+		struct dccp_hdr *dh = dccp_hdr(skb);
+		dh->dccph_checksum = dccp_v6_check(dh, skb->len,
+						   &ireq6->loc_addr,
+						   &ireq6->rmt_addr,
+						   csum_partial((char *)dh,
+								skb->len,
+								skb->csum));
+		ipv6_addr_copy(&fl.fl6_dst, &ireq6->rmt_addr);
+		err = ip6_xmit(sk, skb, &fl, opt, 0);
+		if (err == NET_XMIT_CN)
+			err = 0;
+	}
+
+done:
+        if (opt && opt != np->opt)
+		sock_kfree_s(sk, opt, opt->tot_len);
+	return err;
+}
+
+static void dccp_v6_reqsk_destructor(struct request_sock *req)
+{
+	if (inet6_rsk(req)->pktopts != NULL)
+		kfree_skb(inet6_rsk(req)->pktopts);
+}
+
+static struct request_sock_ops dccp6_request_sock_ops = {
+	.family		= AF_INET6,
+	.obj_size	= sizeof(struct dccp6_request_sock),
+	.rtx_syn_ack	= dccp_v6_send_response,
+	.send_ack	= dccp_v6_reqsk_send_ack,
+	.destructor	= dccp_v6_reqsk_destructor,
+	.send_reset	= dccp_v6_ctl_send_reset,
+};
+
+static struct timewait_sock_ops dccp6_timewait_sock_ops = {
+	.twsk_obj_size	= sizeof(struct dccp6_timewait_sock),
+};
+
+static void dccp_v6_send_check(struct sock *sk, int len, struct sk_buff *skb)
+{
+	struct ipv6_pinfo *np = inet6_sk(sk);
+	struct dccp_hdr *dh = dccp_hdr(skb);
+
+	dh->dccph_checksum = csum_ipv6_magic(&np->saddr, &np->daddr,
+					     len, IPPROTO_DCCP, 
+					     csum_partial((char *)dh,
+							  dh->dccph_doff << 2,
+							  skb->csum));
+}
+
+static void dccp_v6_ctl_send_reset(struct sk_buff *rxskb)
+{
+	struct dccp_hdr *rxdh = dccp_hdr(rxskb), *dh; 
+	const int dccp_hdr_reset_len = sizeof(struct dccp_hdr) +
+				       sizeof(struct dccp_hdr_ext) +
+				       sizeof(struct dccp_hdr_reset);
+	struct sk_buff *skb;
+	struct flowi fl;
+	u64 seqno;
+
+	if (rxdh->dccph_type == DCCP_PKT_RESET)
+		return;
+
+	if (!ipv6_unicast_destination(rxskb))
+		return; 
+
+	/*
+	 * We need to grab some memory, and put together an RST,
+	 * and then put it into the queue to be sent.
+	 */
+
+	skb = alloc_skb(MAX_HEADER + sizeof(struct ipv6hdr) +
+			dccp_hdr_reset_len, GFP_ATOMIC);
+	if (skb == NULL) 
+	  	return;
+
+	skb_reserve(skb, MAX_HEADER + sizeof(struct ipv6hdr) +
+		    dccp_hdr_reset_len);
+
+	skb->h.raw = skb_push(skb, dccp_hdr_reset_len);
+	dh = dccp_hdr(skb);
+	memset(dh, 0, dccp_hdr_reset_len);
+
+	/* Swap the send and the receive. */
+	dh->dccph_type	= DCCP_PKT_RESET;
+	dh->dccph_sport	= rxdh->dccph_dport;
+	dh->dccph_dport	= rxdh->dccph_sport;
+	dh->dccph_doff	= dccp_hdr_reset_len / 4;
+	dh->dccph_x	= 1;
+	dccp_hdr_reset(skb)->dccph_reset_code =
+				DCCP_SKB_CB(rxskb)->dccpd_reset_code;
+
+	/* See "8.3.1. Abnormal Termination" in draft-ietf-dccp-spec-11 */
+	seqno = 0;
+	if (DCCP_SKB_CB(rxskb)->dccpd_ack_seq != DCCP_PKT_WITHOUT_ACK_SEQ)
+		dccp_set_seqno(&seqno, DCCP_SKB_CB(rxskb)->dccpd_ack_seq + 1);
+
+	dccp_hdr_set_seq(dh, seqno);
+	dccp_hdr_set_ack(dccp_hdr_ack_bits(skb),
+			 DCCP_SKB_CB(rxskb)->dccpd_seq);
+
+	memset(&fl, 0, sizeof(fl));
+	ipv6_addr_copy(&fl.fl6_dst, &rxskb->nh.ipv6h->saddr);
+	ipv6_addr_copy(&fl.fl6_src, &rxskb->nh.ipv6h->daddr);
+	dh->dccph_checksum = csum_ipv6_magic(&fl.fl6_src, &fl.fl6_dst,
+					     sizeof(*dh), IPPROTO_DCCP,
+					     skb->csum);
+	fl.proto = IPPROTO_DCCP;
+	fl.oif = inet6_iif(rxskb);
+	fl.fl_ip_dport = dh->dccph_dport;
+	fl.fl_ip_sport = dh->dccph_sport;
+
+	/* sk = NULL, but it is safe for now. RST socket required. */
+	if (!ip6_dst_lookup(NULL, &skb->dst, &fl)) {
+		if (xfrm_lookup(&skb->dst, &fl, NULL, 0) >= 0) {
+			ip6_xmit(NULL, skb, &fl, NULL, 0);
+			DCCP_INC_STATS_BH(DCCP_MIB_OUTSEGS);
+			DCCP_INC_STATS_BH(DCCP_MIB_OUTRSTS);
+			return;
+		}
+	}
+
+	kfree_skb(skb);
+}
+
+static void dccp_v6_ctl_send_ack(struct sk_buff *rxskb)
+{
+	struct flowi fl;
+	struct dccp_hdr *rxdh = dccp_hdr(rxskb), *dh;
+	const int dccp_hdr_ack_len = sizeof(struct dccp_hdr) +
+				     sizeof(struct dccp_hdr_ext) +
+				     sizeof(struct dccp_hdr_ack_bits);
+	struct sk_buff *skb;
+
+	skb = alloc_skb(MAX_HEADER + sizeof(struct ipv6hdr) +
+			dccp_hdr_ack_len, GFP_ATOMIC);
+	if (skb == NULL)
+		return;
+
+	skb_reserve(skb, MAX_HEADER + sizeof(struct ipv6hdr) +
+			 dccp_hdr_ack_len);
+
+	skb->h.raw = skb_push(skb, dccp_hdr_ack_len);
+	dh = dccp_hdr(skb);
+	memset(dh, 0, dccp_hdr_ack_len);
+
+	/* Build DCCP header and checksum it. */
+	dh->dccph_type	= DCCP_PKT_ACK;
+	dh->dccph_sport = rxdh->dccph_dport;
+	dh->dccph_dport = rxdh->dccph_sport;
+	dh->dccph_doff	= dccp_hdr_ack_len / 4;
+	dh->dccph_x	= 1;
+	
+	dccp_hdr_set_seq(dh, DCCP_SKB_CB(rxskb)->dccpd_ack_seq);
+	dccp_hdr_set_ack(dccp_hdr_ack_bits(skb),
+			 DCCP_SKB_CB(rxskb)->dccpd_seq);
+
+	memset(&fl, 0, sizeof(fl));
+	ipv6_addr_copy(&fl.fl6_dst, &rxskb->nh.ipv6h->saddr);
+	ipv6_addr_copy(&fl.fl6_src, &rxskb->nh.ipv6h->daddr);
+
+	/* FIXME: calculate checksum, IPv4 also should... */
+
+	fl.proto = IPPROTO_DCCP;
+	fl.oif = inet6_iif(rxskb);
+	fl.fl_ip_dport = dh->dccph_dport;
+	fl.fl_ip_sport = dh->dccph_sport;
+
+	if (!ip6_dst_lookup(NULL, &skb->dst, &fl)) {
+		if (xfrm_lookup(&skb->dst, &fl, NULL, 0) >= 0) {
+			ip6_xmit(NULL, skb, &fl, NULL, 0);
+			DCCP_INC_STATS_BH(DCCP_MIB_OUTSEGS);
+			return;
+		}
+	}
+
+	kfree_skb(skb);
+}
+
+static void dccp_v6_reqsk_send_ack(struct sk_buff *skb,
+				   struct request_sock *req)
+{
+	dccp_v6_ctl_send_ack(skb);
+}
+
+static struct sock *dccp_v6_hnd_req(struct sock *sk,struct sk_buff *skb)
+{
+	const struct dccp_hdr *dh = dccp_hdr(skb);
+	const struct ipv6hdr *iph = skb->nh.ipv6h;
+	struct sock *nsk;
+	struct request_sock **prev;
+	/* Find possible connection requests. */
+	struct request_sock *req = inet6_csk_search_req(sk, &prev,
+							dh->dccph_sport,
+							&iph->saddr,
+							&iph->daddr,
+							inet6_iif(skb));
+	if (req != NULL)
+		return dccp_check_req(sk, skb, req, prev);
+
+	nsk = __inet6_lookup_established(&dccp_hashinfo,
+					 &iph->saddr, dh->dccph_sport,
+					 &iph->daddr, ntohs(dh->dccph_dport),
+					 inet6_iif(skb));
+
+	if (nsk != NULL) {
+		if (nsk->sk_state != DCCP_TIME_WAIT) {
+			bh_lock_sock(nsk);
+			return nsk;
+		}
+		inet_twsk_put((struct inet_timewait_sock *)nsk);
+		return NULL;
+	}
+
+	return sk;
+}
+
+static int dccp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
+{
+	struct inet_request_sock *ireq;
+	struct dccp_sock dp;
+	struct request_sock *req;
+	struct dccp_request_sock *dreq;
+	struct inet6_request_sock *ireq6;
+	struct ipv6_pinfo *np = inet6_sk(sk);
+ 	const __u32 service = dccp_hdr_request(skb)->dccph_req_service;
+	struct dccp_skb_cb *dcb = DCCP_SKB_CB(skb);
+	__u8 reset_code = DCCP_RESET_CODE_TOO_BUSY;
+
+	if (skb->protocol == htons(ETH_P_IP))
+		return dccp_v4_conn_request(sk, skb);
+
+	if (!ipv6_unicast_destination(skb))
+		goto drop; 
+
+	if (dccp_bad_service_code(sk, service)) {
+		reset_code = DCCP_RESET_CODE_BAD_SERVICE_CODE;
+		goto drop;
+ 	}
+	/*
+	 *	There are no SYN attacks on IPv6, yet...	
+	 */
+	if (inet_csk_reqsk_queue_is_full(sk))
+		goto drop;		
+
+	if (sk_acceptq_is_full(sk) && inet_csk_reqsk_queue_young(sk) > 1)
+		goto drop;
+
+	req = inet6_reqsk_alloc(sk->sk_prot->rsk_prot);
+	if (req == NULL)
+		goto drop;
+
+	/* FIXME: process options */
+
+	dccp_openreq_init(req, &dp, skb);
+
+	ireq6 = inet6_rsk(req);
+	ireq = inet_rsk(req);
+	ipv6_addr_copy(&ireq6->rmt_addr, &skb->nh.ipv6h->saddr);
+	ipv6_addr_copy(&ireq6->loc_addr, &skb->nh.ipv6h->daddr);
+	req->rcv_wnd	= 100; /* Fake, option parsing will get the
+				  right value */
+	ireq6->pktopts	= NULL;
+
+	if (ipv6_opt_accepted(sk, skb) ||
+	    np->rxopt.bits.rxinfo || np->rxopt.bits.rxoinfo ||
+	    np->rxopt.bits.rxhlim || np->rxopt.bits.rxohlim) {
+		atomic_inc(&skb->users);
+		ireq6->pktopts = skb;
+	}
+	ireq6->iif = sk->sk_bound_dev_if;
+
+	/* So that link locals have meaning */
+	if (!sk->sk_bound_dev_if &&
+	    ipv6_addr_type(&ireq6->rmt_addr) & IPV6_ADDR_LINKLOCAL)
+		ireq6->iif = inet6_iif(skb);
+
+	/* 
+	 * Step 3: Process LISTEN state
+	 *
+	 * Set S.ISR, S.GSR, S.SWL, S.SWH from packet or Init Cookie
+	 *
+	 * In fact we defer setting S.GSR, S.SWL, S.SWH to
+	 * dccp_create_openreq_child.
+	 */
+	dreq = dccp_rsk(req);
+	dreq->dreq_isr	   = dcb->dccpd_seq;
+	dreq->dreq_iss	   = dccp_v6_init_sequence(sk, skb);
+	dreq->dreq_service = service;
+
+	if (dccp_v6_send_response(sk, req, NULL))
+		goto drop_and_free;
+
+	inet6_csk_reqsk_queue_hash_add(sk, req, DCCP_TIMEOUT_INIT);
+	return 0;
+
+drop_and_free:
+	reqsk_free(req);
+drop:
+	DCCP_INC_STATS_BH(DCCP_MIB_ATTEMPTFAILS);
+	dcb->dccpd_reset_code = reset_code;
+	return -1;
+}
+
+static struct sock *dccp_v6_request_recv_sock(struct sock *sk,
+					      struct sk_buff *skb,
+					      struct request_sock *req,
+					      struct dst_entry *dst)
+{
+	struct inet6_request_sock *ireq6 = inet6_rsk(req);
+	struct ipv6_pinfo *newnp, *np = inet6_sk(sk);
+	struct inet_sock *newinet;
+	struct dccp_sock *newdp;
+	struct dccp6_sock *newdp6;
+	struct sock *newsk;
+	struct ipv6_txoptions *opt;
+
+	if (skb->protocol == htons(ETH_P_IP)) {
+		/*
+		 *	v6 mapped
+		 */
+
+		newsk = dccp_v4_request_recv_sock(sk, skb, req, dst);
+		if (newsk == NULL) 
+			return NULL;
+
+		newdp6 = (struct dccp6_sock *)newsk;
+		newdp = dccp_sk(newsk);
+		newinet = inet_sk(newsk);
+		newinet->pinet6 = &newdp6->inet6;
+		newnp = inet6_sk(newsk);
+
+		memcpy(newnp, np, sizeof(struct ipv6_pinfo));
+
+		ipv6_addr_set(&newnp->daddr, 0, 0, htonl(0x0000FFFF),
+			      newinet->daddr);
+
+		ipv6_addr_set(&newnp->saddr, 0, 0, htonl(0x0000FFFF),
+			      newinet->saddr);
+
+		ipv6_addr_copy(&newnp->rcv_saddr, &newnp->saddr);
+
+		inet_csk(newsk)->icsk_af_ops = &dccp_ipv6_mapped;
+		newsk->sk_backlog_rcv = dccp_v4_do_rcv;
+		newnp->pktoptions  = NULL;
+		newnp->opt	   = NULL;
+		newnp->mcast_oif   = inet6_iif(skb);
+		newnp->mcast_hops  = skb->nh.ipv6h->hop_limit;
+
+		/*
+		 * No need to charge this sock to the relevant IPv6 refcnt debug socks count
+		 * here, dccp_create_openreq_child now does this for us, see the comment in
+		 * that function for the gory details. -acme
+		 */
+
+		/* It is tricky place. Until this moment IPv4 tcp
+		   worked with IPv6 icsk.icsk_af_ops.
+		   Sync it now.
+		 */
+		dccp_sync_mss(newsk, inet_csk(newsk)->icsk_pmtu_cookie);
+
+		return newsk;
+	}
+
+	opt = np->opt;
+
+	if (sk_acceptq_is_full(sk))
+		goto out_overflow;
+
+	if (np->rxopt.bits.osrcrt == 2 &&
+	    opt == NULL && ireq6->pktopts) {
+		struct inet6_skb_parm *rxopt = IP6CB(ireq6->pktopts);
+		if (rxopt->srcrt)
+			opt = ipv6_invert_rthdr(sk,
+				(struct ipv6_rt_hdr *)(ireq6->pktopts->nh.raw +
+						       rxopt->srcrt));
+	}
+
+	if (dst == NULL) {
+		struct in6_addr *final_p = NULL, final;
+		struct flowi fl;
+
+		memset(&fl, 0, sizeof(fl));
+		fl.proto = IPPROTO_DCCP;
+		ipv6_addr_copy(&fl.fl6_dst, &ireq6->rmt_addr);
+		if (opt && opt->srcrt) {
+			struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
+			ipv6_addr_copy(&final, &fl.fl6_dst);
+			ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
+			final_p = &final;
+		}
+		ipv6_addr_copy(&fl.fl6_src, &ireq6->loc_addr);
+		fl.oif = sk->sk_bound_dev_if;
+		fl.fl_ip_dport = inet_rsk(req)->rmt_port;
+		fl.fl_ip_sport = inet_sk(sk)->sport;
+
+		if (ip6_dst_lookup(sk, &dst, &fl))
+			goto out;
+
+		if (final_p)
+			ipv6_addr_copy(&fl.fl6_dst, final_p);
+
+		if ((xfrm_lookup(&dst, &fl, sk, 0)) < 0)
+			goto out;
+	} 
+
+	newsk = dccp_create_openreq_child(sk, req, skb);
+	if (newsk == NULL)
+		goto out;
+
+	/*
+	 * No need to charge this sock to the relevant IPv6 refcnt debug socks
+	 * count here, dccp_create_openreq_child now does this for us, see the
+	 * comment in that function for the gory details. -acme
+	 */
+
+	ip6_dst_store(newsk, dst, NULL);
+	newsk->sk_route_caps = dst->dev->features &
+		~(NETIF_F_IP_CSUM | NETIF_F_TSO);
+
+	newdp6 = (struct dccp6_sock *)newsk;
+	newinet = inet_sk(newsk);
+	newinet->pinet6 = &newdp6->inet6;
+	newdp = dccp_sk(newsk);
+	newnp = inet6_sk(newsk);
+
+	memcpy(newnp, np, sizeof(struct ipv6_pinfo));
+
+	ipv6_addr_copy(&newnp->daddr, &ireq6->rmt_addr);
+	ipv6_addr_copy(&newnp->saddr, &ireq6->loc_addr);
+	ipv6_addr_copy(&newnp->rcv_saddr, &ireq6->loc_addr);
+	newsk->sk_bound_dev_if = ireq6->iif;
+
+	/* Now IPv6 options... 
+
+	   First: no IPv4 options.
+	 */
+	newinet->opt = NULL;
+
+	/* Clone RX bits */
+	newnp->rxopt.all = np->rxopt.all;
+
+	/* Clone pktoptions received with SYN */
+	newnp->pktoptions = NULL;
+	if (ireq6->pktopts != NULL) {
+		newnp->pktoptions = skb_clone(ireq6->pktopts, GFP_ATOMIC);
+		kfree_skb(ireq6->pktopts);
+		ireq6->pktopts = NULL;
+		if (newnp->pktoptions)
+			skb_set_owner_r(newnp->pktoptions, newsk);
+	}
+	newnp->opt	  = NULL;
+	newnp->mcast_oif  = inet6_iif(skb);
+	newnp->mcast_hops = skb->nh.ipv6h->hop_limit;
+
+	/* Clone native IPv6 options from listening socket (if any)
+
+	   Yes, keeping reference count would be much more clever,
+	   but we make one more one thing there: reattach optmem
+	   to newsk.
+	 */
+	if (opt) {
+		newnp->opt = ipv6_dup_options(newsk, opt);
+		if (opt != np->opt)
+			sock_kfree_s(sk, opt, opt->tot_len);
+	}
+
+	inet_csk(newsk)->icsk_ext_hdr_len = 0;
+	if (newnp->opt)
+		inet_csk(newsk)->icsk_ext_hdr_len = (newnp->opt->opt_nflen +
+						     newnp->opt->opt_flen);
+
+	dccp_sync_mss(newsk, dst_mtu(dst));
+
+	newinet->daddr = newinet->saddr = newinet->rcv_saddr = LOOPBACK4_IPV6;
+
+	__inet6_hash(&dccp_hashinfo, newsk);
+	inet_inherit_port(&dccp_hashinfo, sk, newsk);
+
+	return newsk;
+
+out_overflow:
+	NET_INC_STATS_BH(LINUX_MIB_LISTENOVERFLOWS);
+out:
+	NET_INC_STATS_BH(LINUX_MIB_LISTENDROPS);
+	if (opt && opt != np->opt)
+		sock_kfree_s(sk, opt, opt->tot_len);
+	dst_release(dst);
+	return NULL;
+}
+
+/* The socket must have it's spinlock held when we get
+ * here.
+ *
+ * We have a potential double-lock case here, so even when
+ * doing backlog processing we use the BH locking scheme.
+ * This is because we cannot sleep with the original spinlock
+ * held.
+ */
+static int dccp_v6_do_rcv(struct sock *sk, struct sk_buff *skb)
+{
+	struct ipv6_pinfo *np = inet6_sk(sk);
+	struct sk_buff *opt_skb = NULL;
+
+	/* Imagine: socket is IPv6. IPv4 packet arrives,
+	   goes to IPv4 receive handler and backlogged.
+	   From backlog it always goes here. Kerboom...
+	   Fortunately, dccp_rcv_established and rcv_established
+	   handle them correctly, but it is not case with
+	   dccp_v6_hnd_req and dccp_v6_ctl_send_reset().   --ANK
+	 */
+
+	if (skb->protocol == htons(ETH_P_IP))
+		return dccp_v4_do_rcv(sk, skb);
+
+	if (sk_filter(sk, skb, 0))
+		goto discard;
+
+	/*
+	 *	socket locking is here for SMP purposes as backlog rcv
+	 *	is currently called with bh processing disabled.
+	 */
+
+	/* Do Stevens' IPV6_PKTOPTIONS.
+
+	   Yes, guys, it is the only place in our code, where we
+	   may make it not affecting IPv4.
+	   The rest of code is protocol independent,
+	   and I do not like idea to uglify IPv4.
+
+	   Actually, all the idea behind IPV6_PKTOPTIONS
+	   looks not very well thought. For now we latch
+	   options, received in the last packet, enqueued
+	   by tcp. Feel free to propose better solution.
+	                                       --ANK (980728)
+	 */
+	if (np->rxopt.all)
+		opt_skb = skb_clone(skb, GFP_ATOMIC);
+
+	if (sk->sk_state == DCCP_OPEN) { /* Fast path */
+		if (dccp_rcv_established(sk, skb, dccp_hdr(skb), skb->len))
+			goto reset;
+		return 0;
+	}
+
+	if (sk->sk_state == DCCP_LISTEN) { 
+		struct sock *nsk = dccp_v6_hnd_req(sk, skb);
+		if (!nsk)
+			goto discard;
+
+		/*
+		 * Queue it on the new socket if the new socket is active,
+		 * otherwise we just shortcircuit this and continue with
+		 * the new socket..
+		 */
+ 		if(nsk != sk) {
+			if (dccp_child_process(sk, nsk, skb))
+				goto reset;
+			if (opt_skb)
+				__kfree_skb(opt_skb);
+			return 0;
+		}
+	}
+
+	if (dccp_rcv_state_process(sk, skb, dccp_hdr(skb), skb->len))
+		goto reset;
+	return 0;
+
+reset:
+	dccp_v6_ctl_send_reset(skb);
+discard:
+	if (opt_skb)
+		__kfree_skb(opt_skb);
+	kfree_skb(skb);
+	return 0;
+}
+
+static int dccp_v6_rcv(struct sk_buff **pskb, unsigned int *nhoffp)
+{
+	const struct dccp_hdr *dh;
+	struct sk_buff *skb = *pskb;
+	struct sock *sk;
+
+	/* Step 1: Check header basics: */
+
+	if (dccp_invalid_packet(skb))
+		goto discard_it;
+
+	dh = dccp_hdr(skb);
+
+	DCCP_SKB_CB(skb)->dccpd_seq  = dccp_hdr_seq(skb);
+	DCCP_SKB_CB(skb)->dccpd_type = dh->dccph_type;
+
+	if (dccp_packet_without_ack(skb))
+		DCCP_SKB_CB(skb)->dccpd_ack_seq = DCCP_PKT_WITHOUT_ACK_SEQ;
+	else
+		DCCP_SKB_CB(skb)->dccpd_ack_seq = dccp_hdr_ack_seq(skb);
+
+	/* Step 2:
+	 * 	Look up flow ID in table and get corresponding socket */
+	sk = __inet6_lookup(&dccp_hashinfo, &skb->nh.ipv6h->saddr,
+			    dh->dccph_sport,
+			    &skb->nh.ipv6h->daddr, ntohs(dh->dccph_dport),
+			    inet6_iif(skb));
+	/* 
+	 * Step 2:
+	 * 	If no socket ...
+	 *		Generate Reset(No Connection) unless P.type == Reset
+	 *		Drop packet and return
+	 */
+	if (sk == NULL)
+		goto no_dccp_socket;
+
+	/* 
+	 * Step 2:
+	 * 	... or S.state == TIMEWAIT,
+	 *		Generate Reset(No Connection) unless P.type == Reset
+	 *		Drop packet and return
+	 */
+	       
+	if (sk->sk_state == DCCP_TIME_WAIT)
+                goto do_time_wait;
+
+	if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb))
+		goto discard_and_relse;
+
+	return sk_receive_skb(sk, skb) ? -1 : 0;
+
+no_dccp_socket:
+	if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb))
+		goto discard_it;
+	/*
+	 * Step 2:
+	 *		Generate Reset(No Connection) unless P.type == Reset
+	 *		Drop packet and return
+	 */
+	if (dh->dccph_type != DCCP_PKT_RESET) {
+		DCCP_SKB_CB(skb)->dccpd_reset_code =
+					DCCP_RESET_CODE_NO_CONNECTION;
+		dccp_v6_ctl_send_reset(skb);
+	}
+discard_it:
+
+	/*
+	 *	Discard frame
+	 */
+
+	kfree_skb(skb);
+	return 0;
+
+discard_and_relse:
+	sock_put(sk);
+	goto discard_it;
+
+do_time_wait:
+	inet_twsk_put((struct inet_timewait_sock *)sk);
+	goto no_dccp_socket;
+}
+
+static struct inet_connection_sock_af_ops dccp_ipv6_af_ops = {
+	.queue_xmit	=	inet6_csk_xmit,
+	.send_check	=	dccp_v6_send_check,
+	.rebuild_header	=	inet6_sk_rebuild_header,
+	.conn_request	=	dccp_v6_conn_request,
+	.syn_recv_sock	=	dccp_v6_request_recv_sock,
+	.net_header_len	=	sizeof(struct ipv6hdr),
+	.setsockopt	=	ipv6_setsockopt,
+	.getsockopt	=	ipv6_getsockopt,
+	.addr2sockaddr	=	inet6_csk_addr2sockaddr,
+	.sockaddr_len	=	sizeof(struct sockaddr_in6)
+};
+
+/*
+ *	DCCP over IPv4 via INET6 API
+ */
+static struct inet_connection_sock_af_ops dccp_ipv6_mapped = {
+	.queue_xmit	=	ip_queue_xmit,
+	.send_check	=	dccp_v4_send_check,
+	.rebuild_header	=	inet_sk_rebuild_header,
+	.conn_request	=	dccp_v6_conn_request,
+	.syn_recv_sock	=	dccp_v6_request_recv_sock,
+	.net_header_len	=	sizeof(struct iphdr),
+	.setsockopt	=	ipv6_setsockopt,
+	.getsockopt	=	ipv6_getsockopt,
+	.addr2sockaddr	=	inet6_csk_addr2sockaddr,
+	.sockaddr_len	=	sizeof(struct sockaddr_in6)
+};
+
+/* NOTE: A lot of things set to zero explicitly by call to
+ *       sk_alloc() so need not be done here.
+ */
+static int dccp_v6_init_sock(struct sock *sk)
+{
+	int err = dccp_v4_init_sock(sk);
+
+	if (err == 0)
+		inet_csk(sk)->icsk_af_ops = &dccp_ipv6_af_ops;
+
+	return err;
+}
+
+static int dccp_v6_destroy_sock(struct sock *sk)
+{
+	dccp_v4_destroy_sock(sk);
+	return inet6_destroy_sock(sk);
+}
+
+static struct proto dccp_v6_prot = {
+	.name			= "DCCPv6",
+	.owner			= THIS_MODULE,
+	.close			= dccp_close,
+	.connect		= dccp_v6_connect,
+	.disconnect		= dccp_disconnect,
+	.ioctl			= dccp_ioctl,
+	.init			= dccp_v6_init_sock,
+	.setsockopt		= dccp_setsockopt,
+	.getsockopt		= dccp_getsockopt,
+	.sendmsg		= dccp_sendmsg,
+	.recvmsg		= dccp_recvmsg,
+	.backlog_rcv		= dccp_v6_do_rcv,
+	.hash			= dccp_v6_hash,
+	.unhash			= dccp_unhash,
+	.accept			= inet_csk_accept,
+	.get_port		= dccp_v6_get_port,
+	.shutdown		= dccp_shutdown,
+	.destroy		= dccp_v6_destroy_sock,
+	.orphan_count		= &dccp_orphan_count,
+	.max_header		= MAX_DCCP_HEADER,
+	.obj_size		= sizeof(struct dccp6_sock),
+	.rsk_prot		= &dccp6_request_sock_ops,
+	.twsk_prot		= &dccp6_timewait_sock_ops,
+};
+
+static struct inet6_protocol dccp_v6_protocol = {
+	.handler	=	dccp_v6_rcv,
+	.err_handler	=	dccp_v6_err,
+	.flags		=	INET6_PROTO_NOPOLICY | INET6_PROTO_FINAL,
+};
+
+static struct proto_ops inet6_dccp_ops = {
+	.family		= PF_INET6,
+	.owner		= THIS_MODULE,
+	.release	= inet6_release,
+	.bind		= inet6_bind,
+	.connect	= inet_stream_connect,
+	.socketpair	= sock_no_socketpair,
+	.accept		= inet_accept,
+	.getname	= inet6_getname,
+	.poll		= dccp_poll,
+	.ioctl		= inet6_ioctl,
+	.listen		= inet_dccp_listen,
+	.shutdown	= inet_shutdown,
+	.setsockopt	= sock_common_setsockopt,
+	.getsockopt	= sock_common_getsockopt,
+	.sendmsg	= inet_sendmsg,
+	.recvmsg	= sock_common_recvmsg,
+	.mmap		= sock_no_mmap,
+	.sendpage	= sock_no_sendpage,
+};
+
+static struct inet_protosw dccp_v6_protosw = {
+	.type		= SOCK_DCCP,
+	.protocol	= IPPROTO_DCCP,
+	.prot		= &dccp_v6_prot,
+	.ops		= &inet6_dccp_ops,
+	.capability	= -1,
+	.flags		= INET_PROTOSW_ICSK,
+};
+
+static int __init dccp_v6_init(void)
+{
+	int err = proto_register(&dccp_v6_prot, 1);
+
+	if (err != 0)
+		goto out;
+
+	err = inet6_add_protocol(&dccp_v6_protocol, IPPROTO_DCCP);
+	if (err != 0)
+		goto out_unregister_proto;
+
+	inet6_register_protosw(&dccp_v6_protosw);
+out:
+	return err;
+out_unregister_proto:
+	proto_unregister(&dccp_v6_prot);
+	goto out;
+}
+
+static void __exit dccp_v6_exit(void)
+{
+	inet6_del_protocol(&dccp_v6_protocol, IPPROTO_DCCP);
+	inet6_unregister_protosw(&dccp_v6_protosw);
+	proto_unregister(&dccp_v6_prot);
+}
+
+module_init(dccp_v6_init);
+module_exit(dccp_v6_exit);
+
+/*
+ * __stringify doesn't likes enums, so use SOCK_DCCP (6) and IPPROTO_DCCP (33)
+ * values directly, Also cover the case where the protocol is not specified,
+ * i.e. net-pf-PF_INET6-proto-0-type-SOCK_DCCP
+ */
+MODULE_ALIAS("net-pf-" __stringify(PF_INET6) "-proto-33-type-6");
+MODULE_ALIAS("net-pf-" __stringify(PF_INET6) "-proto-0-type-6");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@mandriva.com>");
+MODULE_DESCRIPTION("DCCPv6 - Datagram Congestion Controlled Protocol");
diff --git a/net/dccp/ipv6.h b/net/dccp/ipv6.h
new file mode 100644
index 000000000000..e4d4e9309270
--- /dev/null
+++ b/net/dccp/ipv6.h
@@ -0,0 +1,37 @@
+#ifndef _DCCP_IPV6_H
+#define _DCCP_IPV6_H
+/*
+ *  net/dccp/ipv6.h
+ *
+ *  An implementation of the DCCP protocol
+ *  Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@ghostprotocols.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/config.h>
+#include <linux/dccp.h>
+#include <linux/ipv6.h>
+
+struct dccp6_sock {
+	struct dccp_sock  dccp;
+	/*
+	 * ipv6_pinfo has to be the last member of dccp6_sock,
+	 * see inet6_sk_generic.
+	 */
+	struct ipv6_pinfo inet6;
+};
+
+struct dccp6_request_sock {
+	struct dccp_request_sock  dccp;
+	struct inet6_request_sock inet6;
+};
+
+struct dccp6_timewait_sock {
+	struct inet_timewait_sock   inet;
+	struct inet6_timewait_sock  tw6;
+};
+
+#endif /* _DCCP_IPV6_H */
diff --git a/net/dccp/minisocks.c b/net/dccp/minisocks.c
index 1393461898bb..29261fc198e7 100644
--- a/net/dccp/minisocks.c
+++ b/net/dccp/minisocks.c
@@ -40,6 +40,8 @@ struct inet_timewait_death_row dccp_death_row = {
 					    (unsigned long)&dccp_death_row),
 };
 
+EXPORT_SYMBOL_GPL(dccp_death_row);
+
 void dccp_time_wait(struct sock *sk, int state, int timeo)
 {
 	struct inet_timewait_sock *tw = NULL;
@@ -50,7 +52,18 @@ void dccp_time_wait(struct sock *sk, int state, int timeo)
 	if (tw != NULL) {
 		const struct inet_connection_sock *icsk = inet_csk(sk);
 		const int rto = (icsk->icsk_rto << 2) - (icsk->icsk_rto >> 1);
-
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+		if (tw->tw_family == PF_INET6) {
+			const struct ipv6_pinfo *np = inet6_sk(sk);
+			struct inet6_timewait_sock *tw6;
+
+			tw->tw_ipv6_offset = inet6_tw_offset(sk->sk_prot);
+			tw6 = inet6_twsk((struct sock *)tw);
+			ipv6_addr_copy(&tw6->tw_v6_daddr, &np->daddr);
+			ipv6_addr_copy(&tw6->tw_v6_rcv_saddr, &np->rcv_saddr);
+			tw->tw_ipv6only = np->ipv6only;
+		}
+#endif
 		/* Linkage updates. */
 		__inet_twsk_hashdance(tw, sk, &dccp_hashinfo);
 
@@ -170,6 +183,8 @@ out_free:
 	return newsk;
 }
 
+EXPORT_SYMBOL_GPL(dccp_create_openreq_child);
+
 /* 
  * Process an incoming packet for RESPOND sockets represented
  * as an request_sock.
@@ -214,7 +229,7 @@ struct sock *dccp_check_req(struct sock *sk, struct sk_buff *skb,
 		goto drop;
 	}
 
-	child = dccp_v4_request_recv_sock(sk, skb, req, NULL);
+	child = inet_csk(sk)->icsk_af_ops->syn_recv_sock(sk, skb, req, NULL);
 	if (child == NULL)
 		goto listen_overflow;
 
@@ -236,6 +251,8 @@ drop:
 	goto out;
 }
 
+EXPORT_SYMBOL_GPL(dccp_check_req);
+
 /*
  *  Queue segment on the new socket if the new socket is active,
  *  otherwise we just shortcircuit this and continue with
@@ -266,3 +283,5 @@ int dccp_child_process(struct sock *parent, struct sock *child,
 	sock_put(child);
 	return ret;
 }
+
+EXPORT_SYMBOL_GPL(dccp_child_process);
diff --git a/net/dccp/output.c b/net/dccp/output.c
index 74ff87025878..efd7ffb903a1 100644
--- a/net/dccp/output.c
+++ b/net/dccp/output.c
@@ -15,6 +15,7 @@
 #include <linux/kernel.h>
 #include <linux/skbuff.h>
 
+#include <net/inet_sock.h>
 #include <net/sock.h>
 
 #include "ackvec.h"
@@ -43,6 +44,7 @@ static int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb)
 {
 	if (likely(skb != NULL)) {
 		const struct inet_sock *inet = inet_sk(sk);
+		const struct inet_connection_sock *icsk = inet_csk(sk);
 		struct dccp_sock *dp = dccp_sk(sk);
 		struct dccp_skb_cb *dcb = DCCP_SKB_CB(skb);
 		struct dccp_hdr *dh;
@@ -108,8 +110,7 @@ static int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb)
 			break;
 		}
 
-		dh->dccph_checksum = dccp_v4_checksum(skb, inet->saddr,
-						      inet->daddr);
+		icsk->icsk_af_ops->send_check(sk, skb->len, skb);
 
 		if (set_ack)
 			dccp_event_ack_sent(sk);
@@ -117,7 +118,7 @@ static int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb)
 		DCCP_INC_STATS(DCCP_MIB_OUTSEGS);
 
 		memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
-		err = ip_queue_xmit(skb, 0);
+		err = icsk->icsk_af_ops->queue_xmit(skb, 0);
 		if (err <= 0)
 			return err;
 
@@ -134,20 +135,13 @@ static int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb)
 
 unsigned int dccp_sync_mss(struct sock *sk, u32 pmtu)
 {
+	struct inet_connection_sock *icsk = inet_csk(sk);
 	struct dccp_sock *dp = dccp_sk(sk);
-	int mss_now;
-
-	/*
-	 * FIXME: we really should be using the af_specific thing to support
-	 * 	  IPv6.
-	 * mss_now = pmtu - tp->af_specific->net_header_len -
-	 * 	     sizeof(struct dccp_hdr) - sizeof(struct dccp_hdr_ext);
-	 */
-	mss_now = pmtu - sizeof(struct iphdr) - sizeof(struct dccp_hdr) -
-		  sizeof(struct dccp_hdr_ext);
+	int mss_now = (pmtu - icsk->icsk_af_ops->net_header_len -
+		       sizeof(struct dccp_hdr) - sizeof(struct dccp_hdr_ext));
 
 	/* Now subtract optional transport overhead */
-	mss_now -= dp->dccps_ext_header_len;
+	mss_now -= icsk->icsk_ext_hdr_len;
 
 	/*
 	 * FIXME: this should come from the CCID infrastructure, where, say,
@@ -160,12 +154,14 @@ unsigned int dccp_sync_mss(struct sock *sk, u32 pmtu)
 	mss_now -= ((5 + 6 + 10 + 6 + 6 + 6 + 3) / 4) * 4;
 
 	/* And store cached results */
-	dp->dccps_pmtu_cookie = pmtu;
+	icsk->icsk_pmtu_cookie = pmtu;
 	dp->dccps_mss_cache = mss_now;
 
 	return mss_now;
 }
 
+EXPORT_SYMBOL_GPL(dccp_sync_mss);
+
 void dccp_write_space(struct sock *sk)
 {
 	read_lock(&sk->sk_callback_lock);
@@ -266,7 +262,7 @@ int dccp_write_xmit(struct sock *sk, struct sk_buff *skb, long *timeo)
 
 int dccp_retransmit_skb(struct sock *sk, struct sk_buff *skb)
 {
-	if (inet_sk_rebuild_header(sk) != 0)
+	if (inet_csk(sk)->icsk_af_ops->rebuild_header(sk) != 0)
 		return -EHOSTUNREACH; /* Routing failure or similar. */
 
 	return dccp_transmit_skb(sk, (skb_cloned(skb) ?
@@ -321,6 +317,8 @@ struct sk_buff *dccp_make_response(struct sock *sk, struct dst_entry *dst,
 	return skb;
 }
 
+EXPORT_SYMBOL_GPL(dccp_make_response);
+
 struct sk_buff *dccp_make_reset(struct sock *sk, struct dst_entry *dst,
 				const enum dccp_reset_codes code)
 				   
@@ -377,6 +375,7 @@ struct sk_buff *dccp_make_reset(struct sock *sk, struct dst_entry *dst,
  */
 static inline void dccp_connect_init(struct sock *sk)
 {
+	struct dccp_sock *dp = dccp_sk(sk);
 	struct dst_entry *dst = __sk_dst_get(sk);
 	struct inet_connection_sock *icsk = inet_csk(sk);
 
@@ -385,10 +384,16 @@ static inline void dccp_connect_init(struct sock *sk)
 	
 	dccp_sync_mss(sk, dst_mtu(dst));
 
-	/*
-	 * FIXME: set dp->{dccps_swh,dccps_swl}, with
-	 * something like dccp_inc_seq
-	 */
+	dccp_update_gss(sk, dp->dccps_iss);
+ 	/*
+	 * SWL and AWL are initially adjusted so that they are not less than
+	 * the initial Sequence Numbers received and sent, respectively:
+	 *	SWL := max(GSR + 1 - floor(W/4), ISR),
+	 *	AWL := max(GSS - W' + 1, ISS).
+	 * These adjustments MUST be applied only at the beginning of the
+	 * connection.
+ 	 */
+	dccp_set_seqno(&dp->dccps_awl, max48(dp->dccps_awl, dp->dccps_iss));
 
 	icsk->icsk_retransmits = 0;
 }
@@ -420,6 +425,8 @@ int dccp_connect(struct sock *sk)
 	return 0;
 }
 
+EXPORT_SYMBOL_GPL(dccp_connect);
+
 void dccp_send_ack(struct sock *sk)
 {
 	/* If we have been reset, we may not send again. */
diff --git a/net/dccp/proto.c b/net/dccp/proto.c
index 8a6b2a9e4581..65b11ea90d85 100644
--- a/net/dccp/proto.c
+++ b/net/dccp/proto.c
@@ -24,7 +24,7 @@
 #include <net/checksum.h>
 
 #include <net/inet_common.h>
-#include <net/ip.h>
+#include <net/inet_sock.h>
 #include <net/protocol.h>
 #include <net/sock.h>
 #include <net/xfrm.h>
@@ -34,15 +34,18 @@
 #include <linux/timer.h>
 #include <linux/delay.h>
 #include <linux/poll.h>
-#include <linux/dccp.h>
 
 #include "ccid.h"
 #include "dccp.h"
 
 DEFINE_SNMP_STAT(struct dccp_mib, dccp_statistics) __read_mostly;
 
+EXPORT_SYMBOL_GPL(dccp_statistics);
+
 atomic_t dccp_orphan_count = ATOMIC_INIT(0);
 
+EXPORT_SYMBOL_GPL(dccp_orphan_count);
+
 static struct net_protocol dccp_protocol = {
 	.handler	= dccp_v4_rcv,
 	.err_handler	= dccp_v4_err,
@@ -149,6 +152,8 @@ int dccp_disconnect(struct sock *sk, int flags)
 	return err;
 }
 
+EXPORT_SYMBOL_GPL(dccp_disconnect);
+
 /*
  *	Wait for a DCCP event.
  *
@@ -156,8 +161,8 @@ int dccp_disconnect(struct sock *sk, int flags)
  *	take care of normal races (between the test and the event) and we don't
  *	go look at any of the socket buffers directly.
  */
-static unsigned int dccp_poll(struct file *file, struct socket *sock,
-			      poll_table *wait)
+unsigned int dccp_poll(struct file *file, struct socket *sock,
+		       poll_table *wait)
 {
 	unsigned int mask;
 	struct sock *sk = sock->sk;
@@ -205,12 +210,16 @@ static unsigned int dccp_poll(struct file *file, struct socket *sock,
 	return mask;
 }
 
+EXPORT_SYMBOL_GPL(dccp_poll);
+
 int dccp_ioctl(struct sock *sk, int cmd, unsigned long arg)
 {
 	dccp_pr_debug("entry\n");
 	return -ENOIOCTLCMD;
 }
 
+EXPORT_SYMBOL_GPL(dccp_ioctl);
+
 static int dccp_setsockopt_service(struct sock *sk, const u32 service,
 				   char __user *optval, int optlen)
 {
@@ -254,7 +263,9 @@ int dccp_setsockopt(struct sock *sk, int level, int optname,
 	int val;
 
 	if (level != SOL_DCCP)
-		return ip_setsockopt(sk, level, optname, optval, optlen);
+		return inet_csk(sk)->icsk_af_ops->setsockopt(sk, level,
+							     optname, optval,
+							     optlen);
 
 	if (optlen < sizeof(int))
 		return -EINVAL;
@@ -282,6 +293,8 @@ int dccp_setsockopt(struct sock *sk, int level, int optname,
 	return err;
 }
 
+EXPORT_SYMBOL_GPL(dccp_setsockopt);
+
 static int dccp_getsockopt_service(struct sock *sk, int len,
 				   u32 __user *optval,
 				   int __user *optlen)
@@ -320,8 +333,9 @@ int dccp_getsockopt(struct sock *sk, int level, int optname,
 	int val, len;
 
 	if (level != SOL_DCCP)
-		return ip_getsockopt(sk, level, optname, optval, optlen);
-
+		return inet_csk(sk)->icsk_af_ops->getsockopt(sk, level,
+							     optname, optval,
+							     optlen);
 	if (get_user(len, optlen))
 		return -EFAULT;
 
@@ -354,6 +368,8 @@ int dccp_getsockopt(struct sock *sk, int level, int optname,
 	return 0;
 }
 
+EXPORT_SYMBOL_GPL(dccp_getsockopt);
+
 int dccp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 		 size_t len)
 {
@@ -410,6 +426,8 @@ out_discard:
 	goto out_release;
 }
 
+EXPORT_SYMBOL_GPL(dccp_sendmsg);
+
 int dccp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 		 size_t len, int nonblock, int flags, int *addr_len)
 {
@@ -507,7 +525,9 @@ out:
 	return len;
 }
 
-static int inet_dccp_listen(struct socket *sock, int backlog)
+EXPORT_SYMBOL_GPL(dccp_recvmsg);
+
+int inet_dccp_listen(struct socket *sock, int backlog)
 {
 	struct sock *sk = sock->sk;
 	unsigned char old_state;
@@ -543,6 +563,8 @@ out:
 	return err;
 }
 
+EXPORT_SYMBOL_GPL(inet_dccp_listen);
+
 static const unsigned char dccp_new_state[] = {
 	/* current state:   new state:      action:	*/
 	[0]		  = DCCP_CLOSED,
@@ -648,12 +670,16 @@ adjudge_to_death:
 	sock_put(sk);
 }
 
+EXPORT_SYMBOL_GPL(dccp_close);
+
 void dccp_shutdown(struct sock *sk, int how)
 {
 	dccp_pr_debug("entry\n");
 }
 
-static struct proto_ops inet_dccp_ops = {
+EXPORT_SYMBOL_GPL(dccp_shutdown);
+
+static const struct proto_ops inet_dccp_ops = {
 	.family		= PF_INET,
 	.owner		= THIS_MODULE,
 	.release	= inet_release,
@@ -681,11 +707,11 @@ extern struct net_proto_family inet_family_ops;
 static struct inet_protosw dccp_v4_protosw = {
 	.type		= SOCK_DCCP,
 	.protocol	= IPPROTO_DCCP,
-	.prot		= &dccp_v4_prot,
+	.prot		= &dccp_prot,
 	.ops		= &inet_dccp_ops,
 	.capability	= -1,
 	.no_check	= 0,
-	.flags		= 0,
+	.flags		= INET_PROTOSW_ICSK,
 };
 
 /*
@@ -760,13 +786,15 @@ MODULE_PARM_DESC(thash_entries, "Number of ehash buckets");
 int dccp_debug;
 module_param(dccp_debug, int, 0444);
 MODULE_PARM_DESC(dccp_debug, "Enable debug messages");
+
+EXPORT_SYMBOL_GPL(dccp_debug);
 #endif
 
 static int __init dccp_init(void)
 {
 	unsigned long goal;
 	int ehash_order, bhash_order, i;
-	int rc = proto_register(&dccp_v4_prot, 1);
+	int rc = proto_register(&dccp_prot, 1);
 
 	if (rc)
 		goto out;
@@ -869,7 +897,7 @@ out_free_bind_bucket_cachep:
 	kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep);
 	dccp_hashinfo.bind_bucket_cachep = NULL;
 out_proto_unregister:
-	proto_unregister(&dccp_v4_prot);
+	proto_unregister(&dccp_prot);
 	goto out;
 }
 
@@ -892,7 +920,7 @@ static void __exit dccp_fini(void)
 		   get_order(dccp_hashinfo.ehash_size *
 			     sizeof(struct inet_ehash_bucket)));
 	kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep);
-	proto_unregister(&dccp_v4_prot);
+	proto_unregister(&dccp_prot);
 }
 
 module_init(dccp_init);