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If we are sending a window probe and there's unacked data in the socket, make 

sure at least the persist timer is running.
This commit is contained in:
matt 2015-07-24 04:33:50 +00:00
parent 6de0fc0ff8
commit 49cb8763aa
1 changed files with 18 additions and 8 deletions
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20
sys/netinet/tcp_output.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: tcp_output.c,v 1.183 2015/05/16 01:15:34 kefren Exp $ */
/* $NetBSD: tcp_output.c,v 1.184 2015/07/24 04:33:50 matt Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@ -135,7 +135,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: tcp_output.c,v 1.183 2015/05/16 01:15:34 kefren Exp $");
__KERNEL_RCSID(0, "$NetBSD: tcp_output.c,v 1.184 2015/07/24 04:33:50 matt Exp $");
#include "opt_inet.h"
#include "opt_ipsec.h"
@ -1533,14 +1533,24 @@ send:
* of retransmit time.
*/
timer:
if (TCP_TIMER_ISARMED(tp, TCPT_REXMT) == 0 &&
((sack_rxmit && tp->snd_nxt != tp->snd_max) ||
tp->snd_nxt != tp->snd_una)) {
if (TCP_TIMER_ISARMED(tp, TCPT_REXMT) == 0) {
if ((sack_rxmit && tp->snd_nxt != tp->snd_max)
|| tp->snd_nxt != tp->snd_una) {
if (TCP_TIMER_ISARMED(tp, TCPT_PERSIST)) {
TCP_TIMER_DISARM(tp, TCPT_PERSIST);
tp->t_rxtshift = 0;
}
TCP_TIMER_ARM(tp, TCPT_REXMT, tp->t_rxtcur);
} else if (len == 0 && so->so_snd.sb_cc > 0
&& TCP_TIMER_ISARMED(tp, TCPT_PERSIST) == 0) {
/*
* If we are sending a window probe and there's
* unacked data in the socket, make sure at
* least the persist timer is running.
*/
tp->t_rxtshift = 0;
tcp_setpersist(tp);
}
}
} else
if (SEQ_GT(tp->snd_nxt + len, tp->snd_max))