1 files changed, 64 insertions, 1 deletions

diff --git a/net/sctp/ulpevent.c b/net/sctp/ulpevent.c
index b6842fdb53d4..d1e38308f615 100644
--- a/net/sctp/ulpevent.c
+++ b/net/sctp/ulpevent.c
@@ -341,7 +341,7 @@ struct sctp_ulpevent *sctp_ulpevent_make_peer_addr_change(
         memcpy(&spc->spc_aaddr, aaddr, sizeof(struct sockaddr_storage));
 
         /* Map ipv4 address into v4-mapped-on-v6 address.  */
-        sctp_get_pf_specific(asoc->base.sk->sk_family)->addr_v4map(
+        sctp_get_pf_specific(asoc->base.sk->sk_family)->addr_to_user(
                                         sctp_sk(asoc->base.sk),
                                         (union sctp_addr *)&spc->spc_aaddr);
 
@@ -886,6 +886,69 @@ void sctp_ulpevent_read_sndrcvinfo(const struct sctp_ulpevent *event,
                  sizeof(sinfo), &sinfo);
 }
 
+/* RFC6458, Section 5.3.5 SCTP Receive Information Structure
+ * (SCTP_SNDRCV)
+ */
+void sctp_ulpevent_read_rcvinfo(const struct sctp_ulpevent *event,
+                                struct msghdr *msghdr)
+{
+        struct sctp_rcvinfo rinfo;
+
+        if (sctp_ulpevent_is_notification(event))
+                return;
+
+        memset(&rinfo, 0, sizeof(struct sctp_rcvinfo));
+        rinfo.rcv_sid = event->stream;
+        rinfo.rcv_ssn = event->ssn;
+        rinfo.rcv_ppid = event->ppid;
+        rinfo.rcv_flags = event->flags;
+        rinfo.rcv_tsn = event->tsn;
+        rinfo.rcv_cumtsn = event->cumtsn;
+        rinfo.rcv_assoc_id = sctp_assoc2id(event->asoc);
+        rinfo.rcv_context = event->asoc->default_rcv_context;
+
+        put_cmsg(msghdr, IPPROTO_SCTP, SCTP_RCVINFO,
+                 sizeof(rinfo), &rinfo);
+}
+
+/* RFC6458, Section 5.3.6. SCTP Next Receive Information Structure
+ * (SCTP_NXTINFO)
+ */
+static void __sctp_ulpevent_read_nxtinfo(const struct sctp_ulpevent *event,
+                                         struct msghdr *msghdr,
+                                         const struct sk_buff *skb)
+{
+        struct sctp_nxtinfo nxtinfo;
+
+        memset(&nxtinfo, 0, sizeof(nxtinfo));
+        nxtinfo.nxt_sid = event->stream;
+        nxtinfo.nxt_ppid = event->ppid;
+        nxtinfo.nxt_flags = event->flags;
+        if (sctp_ulpevent_is_notification(event))
+                nxtinfo.nxt_flags |= SCTP_NOTIFICATION;
+        nxtinfo.nxt_length = skb->len;
+        nxtinfo.nxt_assoc_id = sctp_assoc2id(event->asoc);
+
+        put_cmsg(msghdr, IPPROTO_SCTP, SCTP_NXTINFO,
+                 sizeof(nxtinfo), &nxtinfo);
+}
+
+void sctp_ulpevent_read_nxtinfo(const struct sctp_ulpevent *event,
+                                struct msghdr *msghdr,
+                                struct sock *sk)
+{
+        struct sk_buff *skb;
+        int err;
+
+        skb = sctp_skb_recv_datagram(sk, MSG_PEEK, 1, &err);
+        if (skb != NULL) {
+                __sctp_ulpevent_read_nxtinfo(sctp_skb2event(skb),
+                                             msghdr, skb);
+                /* Just release refcount here. */
+                kfree_skb(skb);
+        }
+}
+
 /* Do accounting for bytes received and hold a reference to the association
  * for each skb.
  */