Author: tuexen
Date: Sun Dec  1 17:35:36 2019
New Revision: 355265
URL: https://svnweb.freebsd.org/changeset/base/355265

Log:
  When changing the MTU of an SCTP path, not only cancel all ongoing
  RTT measurements, but also scheldule new ones for the future.
  
  Submitted by:         Julius Flohr
  MFC after:            1 week
  Differential Revision:        https://reviews.freebsd.org/D22547

Modified:
  head/sys/netinet/sctp_usrreq.c

Modified: head/sys/netinet/sctp_usrreq.c
==============================================================================
--- head/sys/netinet/sctp_usrreq.c      Sun Dec  1 16:14:44 2019        
(r355264)
+++ head/sys/netinet/sctp_usrreq.c      Sun Dec  1 17:35:36 2019        
(r355265)
@@ -143,7 +143,10 @@ sctp_pathmtu_adjustment(struct sctp_tcb *stcb, uint16_
                                            chk->rec.data.tsn);
                                }
                                /* Clear any time so NO RTT is being done */
-                               chk->do_rtt = 0;
+                               if (chk->do_rtt == 1) {
+                                       chk->do_rtt = 0;
+                                       chk->whoTo->rto_needed = 1;
+                               }
                        }
                }
        }
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