Adds missing sysctl to manage the vtag_time_wait time. This will

even allow disabling time-wait all together if you set the value
to 0 (not advisable actually). The default remains the same
i.e. 60 seconds.

3 files changed, 21 insertions, 1 deletions

diff --git a/sys/netinet/sctp_pcb.c b/sys/netinet/sctp_pcb.c
index ac25d15..3b16293 100644
--- a/sys/netinet/sctp_pcb.c
+++ b/sys/netinet/sctp_pcb.c
@@ -4311,6 +4311,10 @@ sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t
 	struct timeval now;
 	int set, i;
 
+	if (time == 0) {
+		/* Its disabled */
+		return;
+	}
 	(void)SCTP_GETTIME_TIMEVAL(&now);
 	chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
 	set = 0;
@@ -4662,7 +4666,8 @@ sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfre
 	}
 	/* pull from vtag hash */
 	LIST_REMOVE(stcb, sctp_asocs);
-	sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_TIME_WAIT, inp->sctp_lport, stcb->rport);
+	sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
+	    inp->sctp_lport, stcb->rport);
 
 	/*
 	 * Now restop the timers to be sure - this is paranoia at is finest!
diff --git a/sys/netinet/sctp_sysctl.c b/sys/netinet/sctp_sysctl.c
index 969ffdd..6d58a75 100644
--- a/sys/netinet/sctp_sysctl.c
+++ b/sys/netinet/sctp_sysctl.c
@@ -105,6 +105,7 @@ sctp_init_sysctls()
 	SCTP_BASE_SYSCTL(sctp_default_frag_interleave) = SCTPCTL_DEFAULT_FRAG_INTERLEAVE_DEFAULT;
 	SCTP_BASE_SYSCTL(sctp_mobility_base) = SCTPCTL_MOBILITY_BASE_DEFAULT;
 	SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) = SCTPCTL_MOBILITY_FASTHANDOFF_DEFAULT;
+	SCTP_BASE_SYSCTL(sctp_vtag_time_wait) = SCTPCTL_TIME_WAIT_DEFAULT;
 #if defined(SCTP_LOCAL_TRACE_BUF)
 	memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log));
 #endif
@@ -610,6 +611,8 @@ sysctl_sctp_check(SYSCTL_HANDLER_ARGS)
 		RANGECHK(SCTP_BASE_SYSCTL(sctp_logging_level), SCTPCTL_LOGGING_LEVEL_MIN, SCTPCTL_LOGGING_LEVEL_MAX);
 		RANGECHK(SCTP_BASE_SYSCTL(sctp_default_cc_module), SCTPCTL_DEFAULT_CC_MODULE_MIN, SCTPCTL_DEFAULT_CC_MODULE_MAX);
 		RANGECHK(SCTP_BASE_SYSCTL(sctp_default_frag_interleave), SCTPCTL_DEFAULT_FRAG_INTERLEAVE_MIN, SCTPCTL_DEFAULT_FRAG_INTERLEAVE_MAX);
+		RANGECHK(SCTP_BASE_SYSCTL(sctp_vtag_time_wait), SCTPCTL_TIME_WAIT_MIN, SCTPCTL_TIME_WAIT_MAX);
+
 #if defined(__FreeBSD__) || defined(SCTP_APPLE_MOBILITY_BASE)
 		RANGECHK(SCTP_BASE_SYSCTL(sctp_mobility_base), SCTPCTL_MOBILITY_BASE_MIN, SCTPCTL_MOBILITY_BASE_MAX);
 #endif
@@ -909,6 +912,10 @@ SYSCTL_PROC(_net_inet_sctp, OID_AUTO, nat_friendly_init, CTLTYPE_INT | CTLFLAG_R
     &SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly), 0, sysctl_sctp_check, "IU",
     SCTPCTL_NAT_FRIENDLY_DESC);
 
+SYSCTL_PROC(_net_inet_sctp, OID_AUTO, vtag_time_wait, CTLTYPE_INT | CTLFLAG_RW,
+    &SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 0, sysctl_sctp_check, "IU",
+    SCTPCTL_TIME_WAIT_DESC);
+
 #ifdef SCTP_DEBUG
 SYSCTL_PROC(_net_inet_sctp, OID_AUTO, debug, CTLTYPE_INT | CTLFLAG_RW,
     &SCTP_BASE_SYSCTL(sctp_debug_on), 0, sysctl_sctp_check, "IU",
diff --git a/sys/netinet/sctp_sysctl.h b/sys/netinet/sctp_sysctl.h
index 7419568..c274228 100644
--- a/sys/netinet/sctp_sysctl.h
+++ b/sys/netinet/sctp_sysctl.h
@@ -104,6 +104,7 @@ struct sctp_sysctl {
 	uint32_t sctp_udp_tunneling_for_client_enable;
 	uint32_t sctp_udp_tunneling_port;
 	uint32_t sctp_enable_sack_immediately;
+	uint32_t sctp_vtag_time_wait;
 #if defined(SCTP_DEBUG)
 	uint32_t sctp_debug_on;
 #endif
@@ -482,6 +483,13 @@ struct sctp_sysctl {
 #define SCTPCTL_NAT_FRIENDLY_INITS_DEFAULT	SCTPCTL_NAT_FRIENDLY_INITS_MIN
 
 
+/* Vtag tiem wait bits */
+#define SCTPCTL_TIME_WAIT_DESC	"Vtag time wait time 0 disables."
+#define SCTPCTL_TIME_WAIT_MIN	0
+#define SCTPCTL_TIME_WAIT_MAX	0xffffffff
+#define SCTPCTL_TIME_WAIT_DEFAULT	SCTP_TIME_WAIT
+
+
 #if defined(SCTP_DEBUG)
 /* debug: Configure debug output */
 #define SCTPCTL_DEBUG_DESC	"Configure debug output"