# HG changeset patch
# Parent 666d8cc7a67ae815588a508f221946186ca7da18
Recycle 4-tuples in TIME_WAIT more aggressively.

diff -r 666d8cc7a67a -r 4f19784a0da4 sys/netinet/tcp_timewait.c
--- a/sys/netinet/tcp_timewait.c	Fri Aug 17 16:39:13 2012 -0700
+++ b/sys/netinet/tcp_timewait.c	Fri Aug 17 16:40:01 2012 -0700
@@ -403,12 +403,11 @@
 #endif
 
 	/*
-	 * If a new connection request is received
-	 * while in TIME_WAIT, drop the old connection
-	 * and start over if the sequence numbers
-	 * are above the previous ones.
+	 * If a new connection request is received while in TIME_WAIT, drop the
+	 * old connection and start over if the incoming SYN is not a wandering
+	 * duplicate.
 	 */
-	if ((thflags & TH_SYN) && SEQ_GT(th->th_seq, tw->rcv_nxt)) {
+	if ((thflags & TH_SYN) && th->th_seq != tw->irs) {
 		tcp_twclose(tw, 0);
 		return (1);
 	}