1 files changed, 42 insertions, 4 deletions

diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 6766913a53e6..7eb1f1a736fb 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -811,6 +811,28 @@ out:
 	return retval;
 }
 
+/* set addr events to assocs in the endpoint.  ep and addr_wq must be locked */
+int sctp_asconf_mgmt(struct sctp_sock *sp, struct sctp_sockaddr_entry *addrw)
+{
+	struct sock *sk = sctp_opt2sk(sp);
+	union sctp_addr *addr;
+	struct sctp_af *af;
+
+	/* It is safe to write port space in caller. */
+	addr = &addrw->a;
+	addr->v4.sin_port = htons(sp->ep->base.bind_addr.port);
+	af = sctp_get_af_specific(addr->sa.sa_family);
+	if (!af)
+		return -EINVAL;
+	if (sctp_verify_addr(sk, addr, af->sockaddr_len))
+		return -EINVAL;
+
+	if (addrw->state == SCTP_ADDR_NEW)
+		return sctp_send_asconf_add_ip(sk, (struct sockaddr *)addr, 1);
+	else
+		return sctp_send_asconf_del_ip(sk, (struct sockaddr *)addr, 1);
+}
+
 /* Helper for tunneling sctp_bindx() requests through sctp_setsockopt()
  *
  * API 8.1
@@ -3763,6 +3785,12 @@ SCTP_STATIC int sctp_init_sock(struct sock *sk)
 	local_bh_disable();
 	percpu_counter_inc(&sctp_sockets_allocated);
 	sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
+	if (sctp_default_auto_asconf) {
+		list_add_tail(&sp->auto_asconf_list,
+		    &sctp_auto_asconf_splist);
+		sp->do_auto_asconf = 1;
+	} else
+		sp->do_auto_asconf = 0;
 	local_bh_enable();
 
 	return 0;
@@ -3771,13 +3799,17 @@ SCTP_STATIC int sctp_init_sock(struct sock *sk)
 /* Cleanup any SCTP per socket resources.  */
 SCTP_STATIC void sctp_destroy_sock(struct sock *sk)
 {
-	struct sctp_endpoint *ep;
+	struct sctp_sock *sp;
 
 	SCTP_DEBUG_PRINTK("sctp_destroy_sock(sk: %p)\n", sk);
 
 	/* Release our hold on the endpoint. */
-	ep = sctp_sk(sk)->ep;
-	sctp_endpoint_free(ep);
+	sp = sctp_sk(sk);
+	if (sp->do_auto_asconf) {
+		sp->do_auto_asconf = 0;
+		list_del(&sp->auto_asconf_list);
+	}
+	sctp_endpoint_free(sp->ep);
 	local_bh_disable();
 	percpu_counter_dec(&sctp_sockets_allocated);
 	sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
@@ -6512,6 +6544,7 @@ static void sctp_sock_migrate(struct sock *oldsk, struct sock *newsk,
 	struct sk_buff *skb, *tmp;
 	struct sctp_ulpevent *event;
 	struct sctp_bind_hashbucket *head;
+	struct list_head tmplist;
 
 	/* Migrate socket buffer sizes and all the socket level options to the
 	 * new socket.
@@ -6519,7 +6552,12 @@ static void sctp_sock_migrate(struct sock *oldsk, struct sock *newsk,
 	newsk->sk_sndbuf = oldsk->sk_sndbuf;
 	newsk->sk_rcvbuf = oldsk->sk_rcvbuf;
 	/* Brute force copy old sctp opt. */
-	inet_sk_copy_descendant(newsk, oldsk);
+	if (oldsp->do_auto_asconf) {
+		memcpy(&tmplist, &newsp->auto_asconf_list, sizeof(tmplist));
+		inet_sk_copy_descendant(newsk, oldsk);
+		memcpy(&newsp->auto_asconf_list, &tmplist, sizeof(tmplist));
+	} else
+		inet_sk_copy_descendant(newsk, oldsk);
 
 	/* Restore the ep value that was overwritten with the above structure
 	 * copy.