Author: jch
Date: Tue Aug 18 08:27:26 2015
New Revision: 286873
URL: https://svnweb.freebsd.org/changeset/base/286873
Log:
Make clear that TIME_WAIT timeout expiration is managed solely by
tcp_tw_2msl_scan().
Sponsored by: Verisign, Inc.
Modified:
head/sys/netinet/tcp_timer.c
Modified: head/sys/netinet/tcp_timer.c
==============================================================================
--- head/sys/netinet/tcp_timer.c Tue Aug 18 08:18:28 2015
(r286872)
+++ head/sys/netinet/tcp_timer.c Tue Aug 18 08:27:26 2015
(r286873)
@@ -333,21 +333,29 @@ tcp_timer_2msl(void *xtp)
/*
* 2 MSL timeout in shutdown went off. If we're closed but
* still waiting for peer to close and connection has been idle
- * too long, or if 2MSL time is up from TIME_WAIT, delete connection
- * control block. Otherwise, check again in a bit.
+ * too long delete connection control block. Otherwise, check
+ * again in a bit.
+ *
+ * If in TIME_WAIT state just ignore as this timeout is handled in
+ * tcp_tw_2msl_scan().
*
* If fastrecycle of FIN_WAIT_2, in FIN_WAIT_2 and receiver has closed,
* there's no point in hanging onto FIN_WAIT_2 socket. Just close it.
* Ignore fact that there were recent incoming segments.
*/
+ if ((inp->inp_flags & INP_TIMEWAIT) != 0) {
+ INP_WUNLOCK(inp);
+ INP_INFO_RUNLOCK(&V_tcbinfo);
+ CURVNET_RESTORE();
+ return;
+ }
if (tcp_fast_finwait2_recycle && tp->t_state == TCPS_FIN_WAIT_2 &&
tp->t_inpcb && tp->t_inpcb->inp_socket &&
(tp->t_inpcb->inp_socket->so_rcv.sb_state & SBS_CANTRCVMORE)) {
TCPSTAT_INC(tcps_finwait2_drops);
tp = tcp_close(tp);
} else {
- if (tp->t_state != TCPS_TIME_WAIT &&
- ticks - tp->t_rcvtime <= TP_MAXIDLE(tp)) {
+ if (ticks - tp->t_rcvtime <= TP_MAXIDLE(tp)) {
if (!callout_reset(&tp->t_timers->tt_2msl,
TP_KEEPINTVL(tp), tcp_timer_2msl, tp)) {
tp->t_timers->tt_flags &= ~TT_2MSL_RST;
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