1 files changed, 35 insertions, 0 deletions

diff --git a/net/sctp/sm_sideeffect.c b/net/sctp/sm_sideeffect.c
index 3b7230ef77c2..22e670200449 100644
--- a/net/sctp/sm_sideeffect.c
+++ b/net/sctp/sm_sideeffect.c
@@ -397,6 +397,41 @@ out_unlock:
         sctp_transport_put(transport);
 }
 
+/* Handle the timeout of the ICMP protocol unreachable timer.  Trigger
+ * the correct state machine transition that will close the association.
+ */
+void sctp_generate_proto_unreach_event(unsigned long data)
+{
+        struct sctp_transport *transport = (struct sctp_transport *) data;
+        struct sctp_association *asoc = transport->asoc;
+        
+        sctp_bh_lock_sock(asoc->base.sk);
+        if (sock_owned_by_user(asoc->base.sk)) {
+                SCTP_DEBUG_PRINTK("%s:Sock is busy.\n", __func__);
+
+                /* Try again later.  */
+                if (!mod_timer(&transport->proto_unreach_timer,
+                                jiffies + (HZ/20)))
+                        sctp_association_hold(asoc);
+                goto out_unlock;
+        }
+
+        /* Is this structure just waiting around for us to actually
+         * get destroyed?
+         */
+        if (asoc->base.dead)
+                goto out_unlock;
+
+        sctp_do_sm(SCTP_EVENT_T_OTHER,
+                   SCTP_ST_OTHER(SCTP_EVENT_ICMP_PROTO_UNREACH),
+                   asoc->state, asoc->ep, asoc, transport, GFP_ATOMIC);
+
+out_unlock:
+        sctp_bh_unlock_sock(asoc->base.sk);
+        sctp_association_put(asoc);
+}
+
+
 /* Inject a SACK Timeout event into the state machine.  */
 static void sctp_generate_sack_event(unsigned long data)
 {