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Handle small file case with regards to plpmtud blackhole detection.

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Submitted by:	Mikhail <mp@lenta.ru>
MFC after:	2 weeks
Relnotes:	yes
This commit is contained in:
Sean Bruno 2014-10-13 21:06:21 +00:00
parent 0f3e3bc526
commit 882ac53ed7
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=273063
1 changed files with 9 additions and 1 deletions
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10
sys/netinet/tcp_timer.c
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@ -693,7 +693,15 @@ tcp_timer_rexmt(void * xtp)
TCPT_RANGESET(tp->t_rxtcur, rexmt,
tp->t_rttmin, TCPTV_REXMTMAX);
if (V_tcp_pmtud_blackhole_detect && (tp->t_state == TCPS_ESTABLISHED)) {
/*
* We enter the path for PLMTUD if connection is established or, if
* connection is FIN_WAIT_1 status, reason for the last is that if
* amount of data we send is very small, we could send it in couple of
* packets and process straight to FIN. In that case we won't catch
* ESTABLISHED state.
*/
if (V_tcp_pmtud_blackhole_detect && (((tp->t_state == TCPS_ESTABLISHED))
|| (tp->t_state == TCPS_FIN_WAIT_1))) {
int optlen;
#ifdef INET6
int isipv6;