Author: tuexen
Date: Sat Jan 16 14:46:27 2016
New Revision: 294151
URL: https://svnweb.freebsd.org/changeset/base/294151

Log:
  MFC r287294:
  Use 5 times RTO.Max as the default for the shutdown guard timer
  as required by RFC 4960. The sysctl variable can be used to
  overwrite this.

Modified:
  stable/10/sys/netinet/sctp_constants.h
  stable/10/sys/netinet/sctp_sysctl.h
  stable/10/sys/netinet/sctputil.c
Directory Properties:
  stable/10/   (props changed)

Modified: stable/10/sys/netinet/sctp_constants.h
==============================================================================
--- stable/10/sys/netinet/sctp_constants.h      Sat Jan 16 14:43:27 2016        
(r294150)
+++ stable/10/sys/netinet/sctp_constants.h      Sat Jan 16 14:46:27 2016        
(r294151)
@@ -612,10 +612,6 @@ __FBSDID("$FreeBSD$");
 /* 30 seconds + RTO (in ms) */
 #define SCTP_HB_DEFAULT_MSEC   30000
 
-/* Max time I will wait for Shutdown to complete */
-#define SCTP_DEF_MAX_SHUTDOWN_SEC 180
-
-
 /*
  * This is how long a secret lives, NOT how long a cookie lives how many
  * ticks the current secret will live.

Modified: stable/10/sys/netinet/sctp_sysctl.h
==============================================================================
--- stable/10/sys/netinet/sctp_sysctl.h Sat Jan 16 14:43:27 2016        
(r294150)
+++ stable/10/sys/netinet/sctp_sysctl.h Sat Jan 16 14:46:27 2016        
(r294151)
@@ -291,10 +291,10 @@ struct sctp_sysctl {
 #define SCTPCTL_PMTU_RAISE_TIME_DEFAULT        SCTP_DEF_PMTU_RAISE_SEC
 
 /* shutdown_guard_time: Default shutdown guard timer in seconds */
-#define SCTPCTL_SHUTDOWN_GUARD_TIME_DESC       "Default shutdown guard timer 
in seconds"
+#define SCTPCTL_SHUTDOWN_GUARD_TIME_DESC       "Shutdown guard timer in 
seconds (0 means 5 times RTO.Max)"
 #define SCTPCTL_SHUTDOWN_GUARD_TIME_MIN                0
 #define SCTPCTL_SHUTDOWN_GUARD_TIME_MAX                0xFFFFFFFF
-#define SCTPCTL_SHUTDOWN_GUARD_TIME_DEFAULT    SCTP_DEF_MAX_SHUTDOWN_SEC
+#define SCTPCTL_SHUTDOWN_GUARD_TIME_DEFAULT    0
 
 /* secret_lifetime: Default secret lifetime in seconds */
 #define SCTPCTL_SECRET_LIFETIME_DESC   "Default secret lifetime in seconds"

Modified: stable/10/sys/netinet/sctputil.c
==============================================================================
--- stable/10/sys/netinet/sctputil.c    Sat Jan 16 14:43:27 2016        
(r294150)
+++ stable/10/sys/netinet/sctputil.c    Sat Jan 16 14:46:27 2016        
(r294151)
@@ -2123,7 +2123,11 @@ sctp_timer_start(int t_type, struct sctp
                if (stcb == NULL) {
                        return;
                }
-               to_ticks = 
inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN];
+               if (inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] == 
0) {
+                       to_ticks = 5 * MSEC_TO_TICKS(stcb->asoc.maxrto);
+               } else {
+                       to_ticks = 
inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN];
+               }
                tmr = &stcb->asoc.shut_guard_timer;
                break;
        case SCTP_TIMER_TYPE_STRRESET:
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