1 files changed, 182 insertions, 175 deletions

diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c
index cc50fbe9929..1999592ba88 100644
--- a/net/sctp/ipv6.c
+++ b/net/sctp/ipv6.c
@@ -21,16 +21,12 @@
  * See the GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
- * along with GNU CC; see the file COPYING.  If not, write to
- * the Free Software Foundation, 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
+ * along with GNU CC; see the file COPYING.  If not, see
+ * <http://www.gnu.org/licenses/>.
  *
  * Please send any bug reports or fixes you make to the
  * email address(es):
- *    lksctp developers <lksctp-developers@lists.sourceforge.net>
- *
- * Or submit a bug report through the following website:
- *    http://www.sf.net/projects/lksctp
+ *    lksctp developers <linux-sctp@vger.kernel.org>
  *
  * Written or modified by:
  *    Le Yanqun		    <yanqun.le@nokia.com>
@@ -42,11 +38,10 @@
  *
  * Based on:
  *	linux/net/ipv6/tcp_ipv6.c
- *
- * Any bugs reported given to us we will try to fix... any fixes shared will
- * be incorporated into the next SCTP release.
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/module.h>
 #include <linux/errno.h>
 #include <linux/types.h>
@@ -58,6 +53,7 @@
 #include <linux/netdevice.h>
 #include <linux/init.h>
 #include <linux/ipsec.h>
+#include <linux/slab.h>
 
 #include <linux/ipv6.h>
 #include <linux/icmpv6.h>
@@ -77,6 +73,13 @@
 
 #include <asm/uaccess.h>
 
+static inline int sctp_v6_addr_match_len(union sctp_addr *s1,
+					 union sctp_addr *s2);
+static void sctp_v6_to_addr(union sctp_addr *addr, struct in6_addr *saddr,
+			      __be16 port);
+static int sctp_v6_cmp_addr(const union sctp_addr *addr1,
+			    const union sctp_addr *addr2);
+
 /* Event handler for inet6 address addition/deletion events.
  * The sctp_local_addr_list needs to be protocted by a spin lock since
  * multiple notifiers (say IPv4 and IPv6) may be running at the same
@@ -89,6 +92,7 @@ static int sctp_inet6addr_event(struct notifier_block *this, unsigned long ev,
 	struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
 	struct sctp_sockaddr_entry *addr = NULL;
 	struct sctp_sockaddr_entry *temp;
+	struct net *net = dev_net(ifa->idev->dev);
 	int found = 0;
 
 	switch (ev) {
@@ -97,30 +101,32 @@ static int sctp_inet6addr_event(struct notifier_block *this, unsigned long ev,
 		if (addr) {
 			addr->a.v6.sin6_family = AF_INET6;
 			addr->a.v6.sin6_port = 0;
-			ipv6_addr_copy(&addr->a.v6.sin6_addr, &ifa->addr);
+			addr->a.v6.sin6_addr = ifa->addr;
 			addr->a.v6.sin6_scope_id = ifa->idev->dev->ifindex;
 			addr->valid = 1;
-			spin_lock_bh(&sctp_local_addr_lock);
-			list_add_tail_rcu(&addr->list, &sctp_local_addr_list);
-			spin_unlock_bh(&sctp_local_addr_lock);
+			spin_lock_bh(&net->sctp.local_addr_lock);
+			list_add_tail_rcu(&addr->list, &net->sctp.local_addr_list);
+			sctp_addr_wq_mgmt(net, addr, SCTP_ADDR_NEW);
+			spin_unlock_bh(&net->sctp.local_addr_lock);
 		}
 		break;
 	case NETDEV_DOWN:
-		spin_lock_bh(&sctp_local_addr_lock);
+		spin_lock_bh(&net->sctp.local_addr_lock);
 		list_for_each_entry_safe(addr, temp,
-					&sctp_local_addr_list, list) {
+					&net->sctp.local_addr_list, list) {
 			if (addr->a.sa.sa_family == AF_INET6 &&
 					ipv6_addr_equal(&addr->a.v6.sin6_addr,
 						&ifa->addr)) {
+				sctp_addr_wq_mgmt(net, addr, SCTP_ADDR_DEL);
 				found = 1;
 				addr->valid = 0;
 				list_del_rcu(&addr->list);
 				break;
 			}
 		}
-		spin_unlock_bh(&sctp_local_addr_lock);
+		spin_unlock_bh(&net->sctp.local_addr_lock);
 		if (found)
-			call_rcu(&addr->rcu, sctp_local_addr_free);
+			kfree_rcu(addr, rcu);
 		break;
 	}
 
@@ -132,16 +138,17 @@ static struct notifier_block sctp_inet6addr_notifier = {
 };
 
 /* ICMP error handler. */
-SCTP_STATIC void sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
-			     u8 type, u8 code, int offset, __be32 info)
+static void sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
+			u8 type, u8 code, int offset, __be32 info)
 {
 	struct inet6_dev *idev;
 	struct sock *sk;
 	struct sctp_association *asoc;
 	struct sctp_transport *transport;
 	struct ipv6_pinfo *np;
-	sk_buff_data_t saveip, savesctp;
+	__u16 saveip, savesctp;
 	int err;
+	struct net *net = dev_net(skb->dev);
 
 	idev = in6_dev_get(skb->dev);
 
@@ -150,12 +157,12 @@ SCTP_STATIC void sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 	savesctp = skb->transport_header;
 	skb_reset_network_header(skb);
 	skb_set_transport_header(skb, offset);
-	sk = sctp_err_lookup(AF_INET6, skb, sctp_hdr(skb), &asoc, &transport);
+	sk = sctp_err_lookup(net, AF_INET6, skb, sctp_hdr(skb), &asoc, &transport);
 	/* Put back, the original pointers. */
 	skb->network_header   = saveip;
 	skb->transport_header = savesctp;
 	if (!sk) {
-		ICMP6_INC_STATS_BH(dev_net(skb->dev), idev, ICMP6_MIB_INERRORS);
+		ICMP6_INC_STATS_BH(net, idev, ICMP6_MIB_INERRORS);
 		goto out;
 	}
 
@@ -165,7 +172,8 @@ SCTP_STATIC void sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 
 	switch (type) {
 	case ICMPV6_PKT_TOOBIG:
-		sctp_icmp_frag_needed(sk, asoc, transport, ntohl(info));
+		if (ip6_sk_accept_pmtu(sk))
+			sctp_icmp_frag_needed(sk, asoc, transport, ntohl(info));
 		goto out_unlock;
 	case ICMPV6_PARAMPROB:
 		if (ICMPV6_UNK_NEXTHDR == code) {
@@ -173,6 +181,9 @@ SCTP_STATIC void sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 			goto out_unlock;
 		}
 		break;
+	case NDISC_REDIRECT:
+		sctp_icmp_redirect(sk, transport, skb);
+		goto out_unlock;
 	default:
 		break;
 	}
@@ -193,141 +204,103 @@ out:
 		in6_dev_put(idev);
 }
 
-/* Based on tcp_v6_xmit() in tcp_ipv6.c. */
 static int sctp_v6_xmit(struct sk_buff *skb, struct sctp_transport *transport)
 {
 	struct sock *sk = skb->sk;
 	struct ipv6_pinfo *np = inet6_sk(sk);
-	struct flowi fl;
-
-	memset(&fl, 0, sizeof(fl));
-
-	fl.proto = sk->sk_protocol;
-
-	/* Fill in the dest address from the route entry passed with the skb
-	 * and the source address from the transport.
-	 */
-	ipv6_addr_copy(&fl.fl6_dst, &transport->ipaddr.v6.sin6_addr);
-	ipv6_addr_copy(&fl.fl6_src, &transport->saddr.v6.sin6_addr);
-
-	fl.fl6_flowlabel = np->flow_label;
-	IP6_ECN_flow_xmit(sk, fl.fl6_flowlabel);
-	if (ipv6_addr_type(&fl.fl6_src) & IPV6_ADDR_LINKLOCAL)
-		fl.oif = transport->saddr.v6.sin6_scope_id;
-	else
-		fl.oif = sk->sk_bound_dev_if;
-
-	if (np->opt && np->opt->srcrt) {
-		struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt;
-		ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
-	}
+	struct flowi6 *fl6 = &transport->fl.u.ip6;
 
-	SCTP_DEBUG_PRINTK("%s: skb:%p, len:%d, src:%pI6 dst:%pI6\n",
-			  __func__, skb, skb->len,
-			  &fl.fl6_src, &fl.fl6_dst);
+	pr_debug("%s: skb:%p, len:%d, src:%pI6 dst:%pI6\n", __func__, skb,
+		 skb->len, &fl6->saddr, &fl6->daddr);
 
-	SCTP_INC_STATS(SCTP_MIB_OUTSCTPPACKS);
+	IP6_ECN_flow_xmit(sk, fl6->flowlabel);
 
 	if (!(transport->param_flags & SPP_PMTUD_ENABLE))
-		skb->local_df = 1;
+		skb->ignore_df = 1;
 
-	return ip6_xmit(sk, skb, &fl, np->opt, 0);
+	SCTP_INC_STATS(sock_net(sk), SCTP_MIB_OUTSCTPPACKS);
+
+	return ip6_xmit(sk, skb, fl6, np->opt, np->tclass);
 }
 
 /* Returns the dst cache entry for the given source and destination ip
  * addresses.
  */
-static struct dst_entry *sctp_v6_get_dst(struct sctp_association *asoc,
-					 union sctp_addr *daddr,
-					 union sctp_addr *saddr)
+static void sctp_v6_get_dst(struct sctp_transport *t, union sctp_addr *saddr,
+			    struct flowi *fl, struct sock *sk)
 {
-	struct dst_entry *dst;
-	struct flowi fl;
+	struct sctp_association *asoc = t->asoc;
+	struct dst_entry *dst = NULL;
+	struct flowi6 *fl6 = &fl->u.ip6;
+	struct sctp_bind_addr *bp;
+	struct ipv6_pinfo *np = inet6_sk(sk);
+	struct sctp_sockaddr_entry *laddr;
+	union sctp_addr *baddr = NULL;
+	union sctp_addr *daddr = &t->ipaddr;
+	union sctp_addr dst_saddr;
+	struct in6_addr *final_p, final;
+	__u8 matchlen = 0;
+	__u8 bmatchlen;
+	sctp_scope_t scope;
 
-	memset(&fl, 0, sizeof(fl));
-	ipv6_addr_copy(&fl.fl6_dst, &daddr->v6.sin6_addr);
+	memset(fl6, 0, sizeof(struct flowi6));
+	fl6->daddr = daddr->v6.sin6_addr;
+	fl6->fl6_dport = daddr->v6.sin6_port;
+	fl6->flowi6_proto = IPPROTO_SCTP;
 	if (ipv6_addr_type(&daddr->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL)
-		fl.oif = daddr->v6.sin6_scope_id;
+		fl6->flowi6_oif = daddr->v6.sin6_scope_id;
 
+	pr_debug("%s: dst=%pI6 ", __func__, &fl6->daddr);
 
-	SCTP_DEBUG_PRINTK("%s: DST=%pI6 ", __func__, &fl.fl6_dst);
+	if (asoc)
+		fl6->fl6_sport = htons(asoc->base.bind_addr.port);
 
 	if (saddr) {
-		ipv6_addr_copy(&fl.fl6_src, &saddr->v6.sin6_addr);
-		SCTP_DEBUG_PRINTK("SRC=%pI6 - ", &fl.fl6_src);
-	}
-
-	dst = ip6_route_output(&init_net, NULL, &fl);
-	if (!dst->error) {
-		struct rt6_info *rt;
-		rt = (struct rt6_info *)dst;
-		SCTP_DEBUG_PRINTK("rt6_dst:%pI6 rt6_src:%pI6\n",
-			&rt->rt6i_dst.addr, &rt->rt6i_src.addr);
-		return dst;
-	}
-	SCTP_DEBUG_PRINTK("NO ROUTE\n");
-	dst_release(dst);
-	return NULL;
-}
-
-/* Returns the number of consecutive initial bits that match in the 2 ipv6
- * addresses.
- */
-static inline int sctp_v6_addr_match_len(union sctp_addr *s1,
-					 union sctp_addr *s2)
-{
-	struct in6_addr *a1 = &s1->v6.sin6_addr;
-	struct in6_addr *a2 = &s2->v6.sin6_addr;
-	int i, j;
-
-	for (i = 0; i < 4 ; i++) {
-		__be32 a1xora2;
-
-		a1xora2 = a1->s6_addr32[i] ^ a2->s6_addr32[i];
+		fl6->saddr = saddr->v6.sin6_addr;
+		fl6->fl6_sport = saddr->v6.sin6_port;
 
-		if ((j = fls(ntohl(a1xora2))))
-			return (i * 32 + 32 - j);
+		pr_debug("src=%pI6 - ", &fl6->saddr);
 	}
 
-	return (i*32);
-}
-
-/* Fills in the source address(saddr) based on the destination address(daddr)
- * and asoc's bind address list.
- */
-static void sctp_v6_get_saddr(struct sctp_sock *sk,
-			      struct sctp_association *asoc,
-			      struct dst_entry *dst,
-			      union sctp_addr *daddr,
-			      union sctp_addr *saddr)
-{
-	struct sctp_bind_addr *bp;
-	struct sctp_sockaddr_entry *laddr;
-	sctp_scope_t scope;
-	union sctp_addr *baddr = NULL;
-	__u8 matchlen = 0;
-	__u8 bmatchlen;
-
-	SCTP_DEBUG_PRINTK("%s: asoc:%p dst:%p daddr:%pI6 ",
-			  __func__, asoc, dst, &daddr->v6.sin6_addr);
-
-	if (!asoc) {
-		ipv6_dev_get_saddr(sock_net(sctp_opt2sk(sk)),
-				   dst ? ip6_dst_idev(dst)->dev : NULL,
-				   &daddr->v6.sin6_addr,
-				   inet6_sk(&sk->inet.sk)->srcprefs,
-				   &saddr->v6.sin6_addr);
-		SCTP_DEBUG_PRINTK("saddr from ipv6_get_saddr: %pI6\n",
-				  &saddr->v6.sin6_addr);
-		return;
-	}
-
-	scope = sctp_scope(daddr);
+	final_p = fl6_update_dst(fl6, np->opt, &final);
+	dst = ip6_dst_lookup_flow(sk, fl6, final_p);
+	if (!asoc || saddr)
+		goto out;
 
 	bp = &asoc->base.bind_addr;
+	scope = sctp_scope(daddr);
+	/* ip6_dst_lookup has filled in the fl6->saddr for us.  Check
+	 * to see if we can use it.
+	 */
+	if (!IS_ERR(dst)) {
+		/* Walk through the bind address list and look for a bind
+		 * address that matches the source address of the returned dst.
+		 */
+		sctp_v6_to_addr(&dst_saddr, &fl6->saddr, htons(bp->port));
+		rcu_read_lock();
+		list_for_each_entry_rcu(laddr, &bp->address_list, list) {
+			if (!laddr->valid || laddr->state == SCTP_ADDR_DEL ||
+			    (laddr->state != SCTP_ADDR_SRC &&
+			     !asoc->src_out_of_asoc_ok))
+				continue;
+
+			/* Do not compare against v4 addrs */
+			if ((laddr->a.sa.sa_family == AF_INET6) &&
+			    (sctp_v6_cmp_addr(&dst_saddr, &laddr->a))) {
+				rcu_read_unlock();
+				goto out;
+			}
+		}
+		rcu_read_unlock();
+		/* None of the bound addresses match the source address of the
+		 * dst. So release it.
+		 */
+		dst_release(dst);
+		dst = NULL;
+	}
 
-	/* Go through the bind address list and find the best source address
-	 * that matches the scope of the destination address.
+	/* Walk through the bind address list and try to get the
+	 * best source address for a given destination.
 	 */
 	rcu_read_lock();
 	list_for_each_entry_rcu(laddr, &bp->address_list, list) {
@@ -343,17 +316,56 @@ static void sctp_v6_get_saddr(struct sctp_sock *sk,
 			}
 		}
 	}
+	rcu_read_unlock();
 
 	if (baddr) {
-		memcpy(saddr, baddr, sizeof(union sctp_addr));
-		SCTP_DEBUG_PRINTK("saddr: %pI6\n", &saddr->v6.sin6_addr);
+		fl6->saddr = baddr->v6.sin6_addr;
+		fl6->fl6_sport = baddr->v6.sin6_port;
+		final_p = fl6_update_dst(fl6, np->opt, &final);
+		dst = ip6_dst_lookup_flow(sk, fl6, final_p);
+	}
+
+out:
+	if (!IS_ERR_OR_NULL(dst)) {
+		struct rt6_info *rt;
+
+		rt = (struct rt6_info *)dst;
+		t->dst = dst;
+		t->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
+		pr_debug("rt6_dst:%pI6 rt6_src:%pI6\n", &rt->rt6i_dst.addr,
+			 &fl6->saddr);
 	} else {
-		printk(KERN_ERR "%s: asoc:%p Could not find a valid source "
-		       "address for the dest:%pI6\n",
-		       __func__, asoc, &daddr->v6.sin6_addr);
+		t->dst = NULL;
+
+		pr_debug("no route\n");
 	}
+}
 
-	rcu_read_unlock();
+/* Returns the number of consecutive initial bits that match in the 2 ipv6
+ * addresses.
+ */
+static inline int sctp_v6_addr_match_len(union sctp_addr *s1,
+					 union sctp_addr *s2)
+{
+	return ipv6_addr_diff(&s1->v6.sin6_addr, &s2->v6.sin6_addr);
+}
+
+/* Fills in the source address(saddr) based on the destination address(daddr)
+ * and asoc's bind address list.
+ */
+static void sctp_v6_get_saddr(struct sctp_sock *sk,
+			      struct sctp_transport *t,
+			      struct flowi *fl)
+{
+	struct flowi6 *fl6 = &fl->u.ip6;
+	union sctp_addr *saddr = &t->saddr;
+
+	pr_debug("%s: asoc:%p dst:%p\n", __func__, t->asoc, t->dst);
+
+	if (t->dst) {
+		saddr->v6.sin6_family = AF_INET6;
+		saddr->v6.sin6_addr = fl6->saddr;
+	}
 }
 
 /* Make a copy of all potential local addresses. */
@@ -371,9 +383,9 @@ static void sctp_v6_copy_addrlist(struct list_head *addrlist,
 	}
 
 	read_lock_bh(&in6_dev->lock);
-	for (ifp = in6_dev->addr_list; ifp; ifp = ifp->if_next) {
+	list_for_each_entry(ifp, &in6_dev->addr_list, if_list) {
 		/* Add the address to the local list.  */
-		addr = t_new(struct sctp_sockaddr_entry, GFP_ATOMIC);
+		addr = kzalloc(sizeof(*addr), GFP_ATOMIC);
 		if (addr) {
 			addr->a.v6.sin6_family = AF_INET6;
 			addr->a.v6.sin6_port = 0;
@@ -381,7 +393,6 @@ static void sctp_v6_copy_addrlist(struct list_head *addrlist,
 			addr->a.v6.sin6_scope_id = dev->ifindex;
 			addr->valid = 1;
 			INIT_LIST_HEAD(&addr->list);
-			INIT_RCU_HEAD(&addr->rcu);
 			list_add_tail(&addr->list, addrlist);
 		}
 	}
@@ -391,10 +402,9 @@ static void sctp_v6_copy_addrlist(struct list_head *addrlist,
 }
 
 /* Initialize a sockaddr_storage from in incoming skb. */
-static void sctp_v6_from_skb(union sctp_addr *addr,struct sk_buff *skb,
+static void sctp_v6_from_skb(union sctp_addr *addr, struct sk_buff *skb,
 			     int is_saddr)
 {
-	void *from;
 	__be16 *port;
 	struct sctphdr *sh;
 
@@ -406,12 +416,11 @@ static void sctp_v6_from_skb(union sctp_addr *addr,struct sk_buff *skb,
 	sh = sctp_hdr(skb);
 	if (is_saddr) {
 		*port  = sh->source;
-		from = &ipv6_hdr(skb)->saddr;
+		addr->v6.sin6_addr = ipv6_hdr(skb)->saddr;
 	} else {
 		*port = sh->dest;
-		from = &ipv6_hdr(skb)->daddr;
+		addr->v6.sin6_addr = ipv6_hdr(skb)->daddr;
 	}
-	ipv6_addr_copy(&addr->v6.sin6_addr, from);
 }
 
 /* Initialize an sctp_addr from a socket. */
@@ -419,20 +428,20 @@ static void sctp_v6_from_sk(union sctp_addr *addr, struct sock *sk)
 {
 	addr->v6.sin6_family = AF_INET6;
 	addr->v6.sin6_port = 0;
-	addr->v6.sin6_addr = inet6_sk(sk)->rcv_saddr;
+	addr->v6.sin6_addr = sk->sk_v6_rcv_saddr;
 }
 
 /* Initialize sk->sk_rcv_saddr from sctp_addr. */
 static void sctp_v6_to_sk_saddr(union sctp_addr *addr, struct sock *sk)
 {
 	if (addr->sa.sa_family == AF_INET && sctp_sk(sk)->v4mapped) {
-		inet6_sk(sk)->rcv_saddr.s6_addr32[0] = 0;
-		inet6_sk(sk)->rcv_saddr.s6_addr32[1] = 0;
-		inet6_sk(sk)->rcv_saddr.s6_addr32[2] = htonl(0x0000ffff);
-		inet6_sk(sk)->rcv_saddr.s6_addr32[3] =
+		sk->sk_v6_rcv_saddr.s6_addr32[0] = 0;
+		sk->sk_v6_rcv_saddr.s6_addr32[1] = 0;
+		sk->sk_v6_rcv_saddr.s6_addr32[2] = htonl(0x0000ffff);
+		sk->sk_v6_rcv_saddr.s6_addr32[3] =
 			addr->v4.sin_addr.s_addr;
 	} else {
-		inet6_sk(sk)->rcv_saddr = addr->v6.sin6_addr;
+		sk->sk_v6_rcv_saddr = addr->v6.sin6_addr;
 	}
 }
 
@@ -440,12 +449,12 @@ static void sctp_v6_to_sk_saddr(union sctp_addr *addr, struct sock *sk)
 static void sctp_v6_to_sk_daddr(union sctp_addr *addr, struct sock *sk)
 {
 	if (addr->sa.sa_family == AF_INET && sctp_sk(sk)->v4mapped) {
-		inet6_sk(sk)->daddr.s6_addr32[0] = 0;
-		inet6_sk(sk)->daddr.s6_addr32[1] = 0;
-		inet6_sk(sk)->daddr.s6_addr32[2] = htonl(0x0000ffff);
-		inet6_sk(sk)->daddr.s6_addr32[3] = addr->v4.sin_addr.s_addr;
+		sk->sk_v6_daddr.s6_addr32[0] = 0;
+		sk->sk_v6_daddr.s6_addr32[1] = 0;
+		sk->sk_v6_daddr.s6_addr32[2] = htonl(0x0000ffff);
+		sk->sk_v6_daddr.s6_addr32[3] = addr->v4.sin_addr.s_addr;
 	} else {
-		inet6_sk(sk)->daddr = addr->v6.sin6_addr;
+		sk->sk_v6_daddr = addr->v6.sin6_addr;
 	}
 }
 
@@ -457,7 +466,7 @@ static void sctp_v6_from_addr_param(union sctp_addr *addr,
 	addr->v6.sin6_family = AF_INET6;
 	addr->v6.sin6_port = port;
 	addr->v6.sin6_flowinfo = 0; /* BUG */
-	ipv6_addr_copy(&addr->v6.sin6_addr, &param->v6.addr);
+	addr->v6.sin6_addr = param->v6.addr;
 	addr->v6.sin6_scope_id = iif;
 }
 
@@ -471,19 +480,18 @@ static int sctp_v6_to_addr_param(const union sctp_addr *addr,
 
 	param->v6.param_hdr.type = SCTP_PARAM_IPV6_ADDRESS;
 	param->v6.param_hdr.length = htons(length);
-	ipv6_addr_copy(&param->v6.addr, &addr->v6.sin6_addr);
+	param->v6.addr = addr->v6.sin6_addr;
 
 	return length;
 }
 
-/* Initialize a sctp_addr from a dst_entry. */
-static void sctp_v6_dst_saddr(union sctp_addr *addr, struct dst_entry *dst,
+/* Initialize a sctp_addr from struct in6_addr. */
+static void sctp_v6_to_addr(union sctp_addr *addr, struct in6_addr *saddr,
 			      __be16 port)
 {
-	struct rt6_info *rt = (struct rt6_info *)dst;
 	addr->sa.sa_family = AF_INET6;
 	addr->v6.sin6_port = port;
-	ipv6_addr_copy(&addr->v6.sin6_addr, &rt->rt6i_src.addr);
+	addr->v6.sin6_addr = *saddr;
 }
 
 /* Compare addresses exactly.
@@ -542,7 +550,7 @@ static int sctp_v6_is_any(const union sctp_addr *addr)
 static int sctp_v6_available(union sctp_addr *addr, struct sctp_sock *sp)
 {
 	int type;
-	struct in6_addr *in6 = (struct in6_addr *)&addr->v6.sin6_addr;
+	const struct in6_addr *in6 = (const struct in6_addr *)&addr->v6.sin6_addr;
 
 	type = ipv6_addr_type(in6);
 	if (IPV6_ADDR_ANY == type)
@@ -558,7 +566,7 @@ static int sctp_v6_available(union sctp_addr *addr, struct sctp_sock *sp)
 	if (!(type & IPV6_ADDR_UNICAST))
 		return 0;
 
-	return ipv6_chk_addr(&init_net, in6, NULL, 0);
+	return ipv6_chk_addr(sock_net(&sp->inet.sk), in6, NULL, 0);
 }
 
 /* This function checks if the address is a valid address to be used for
@@ -654,6 +662,8 @@ static struct sock *sctp_v6_create_accept_sk(struct sock *sk,
 	 */
 	sctp_v6_to_sk_daddr(&asoc->peer.primary_addr, newsk);
 
+	newsk->sk_v6_rcv_saddr = sk->sk_v6_rcv_saddr;
+
 	sk_refcnt_debug_inc(newsk);
 
 	if (newsk->sk_prot->init(newsk)) {
@@ -738,7 +748,7 @@ static void sctp_inet6_event_msgname(struct sctp_ulpevent *event,
 		}
 
 		sin6from = &asoc->peer.primary_addr.v6;
-		ipv6_addr_copy(&sin6->sin6_addr, &sin6from->sin6_addr);
+		sin6->sin6_addr = sin6from->sin6_addr;
 		if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
 			sin6->sin6_scope_id = sin6from->sin6_scope_id;
 	}
@@ -766,7 +776,7 @@ static void sctp_inet6_skb_msgname(struct sk_buff *skb, char *msgname,
 		}
 
 		/* Otherwise, just copy the v6 address. */
-		ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr);
+		sin6->sin6_addr = ipv6_hdr(skb)->saddr;
 		if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) {
 			struct sctp_ulpevent *ev = sctp_skb2event(skb);
 			sin6->sin6_scope_id = ev->iif;
@@ -835,14 +845,14 @@ static int sctp_inet6_bind_verify(struct sctp_sock *opt, union sctp_addr *addr)
 		struct net_device *dev;
 
 		if (type & IPV6_ADDR_LINKLOCAL) {
+			struct net *net;
 			if (!addr->v6.sin6_scope_id)
 				return 0;
+			net = sock_net(&opt->inet.sk);
 			rcu_read_lock();
-			dev = dev_get_by_index_rcu(&init_net,
-						   addr->v6.sin6_scope_id);
+			dev = dev_get_by_index_rcu(net, addr->v6.sin6_scope_id);
 			if (!dev ||
-			    !ipv6_chk_addr(&init_net, &addr->v6.sin6_addr,
-					   dev, 0)) {
+			    !ipv6_chk_addr(net, &addr->v6.sin6_addr, dev, 0)) {
 				rcu_read_unlock();
 				return 0;
 			}
@@ -875,7 +885,7 @@ static int sctp_inet6_send_verify(struct sctp_sock *opt, union sctp_addr *addr)
 			if (!addr->v6.sin6_scope_id)
 				return 0;
 			rcu_read_lock();
-			dev = dev_get_by_index_rcu(&init_net,
+			dev = dev_get_by_index_rcu(sock_net(&opt->inet.sk),
 						   addr->v6.sin6_scope_id);
 			rcu_read_unlock();
 			if (!dev)
@@ -933,7 +943,6 @@ static struct inet_protosw sctpv6_seqpacket_protosw = {
 	.protocol      = IPPROTO_SCTP,
 	.prot 	       = &sctpv6_prot,
 	.ops           = &inet6_seqpacket_ops,
-	.no_check      = 0,
 	.flags         = SCTP_PROTOSW_FLAG
 };
 static struct inet_protosw sctpv6_stream_protosw = {
@@ -941,7 +950,6 @@ static struct inet_protosw sctpv6_stream_protosw = {
 	.protocol      = IPPROTO_SCTP,
 	.prot 	       = &sctpv6_prot,
 	.ops           = &inet6_seqpacket_ops,
-	.no_check      = 0,
 	.flags         = SCTP_PROTOSW_FLAG,
 };
 
@@ -970,7 +978,6 @@ static struct sctp_af sctp_af_inet6 = {
 	.to_sk_daddr	   = sctp_v6_to_sk_daddr,
 	.from_addr_param   = sctp_v6_from_addr_param,
 	.to_addr_param	   = sctp_v6_to_addr_param,
-	.dst_saddr	   = sctp_v6_dst_saddr,
 	.cmp_addr	   = sctp_v6_cmp_addr,
 	.scope		   = sctp_v6_scope,
 	.addr_valid	   = sctp_v6_addr_valid,