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Add a counter for the number of times the listen queue was overflowed to

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the tcpstat structure. (netstat -s)
Reviewed by:	wollman
Obtained from: Steves, TCP/IP Ill. vol.3, page 189
This commit is contained in:
Guido van Rooij 1996-02-26 21:47:13 +00:00
parent 9abcd27118
commit 1347f5b8e5
4 changed files with 11 additions and 5 deletions
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6
sys/netinet/tcp_input.c
View File

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* @(#)tcp_input.c 8.12 (Berkeley) 5/24/95
* $Id: tcp_input.c,v 1.35 1996/01/31 08:22:24 olah Exp $
* $Id: tcp_input.c,v 1.36 1996/02/22 11:46:39 davidg Exp $
*/
#ifndef TUBA_INCLUDE
@ -396,8 +396,10 @@ tcp_input(m, iphlen)
if (so->so_options & SO_ACCEPTCONN) {
register struct tcpcb *tp0 = tp;
so = sonewconn(so, 0);
if (so == 0)
if (so == 0) {
tcpstat.tcps_listendrop++;
goto drop;
}
/*
* This is ugly, but ....
*

6
sys/netinet/tcp_reass.c
View File

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* @(#)tcp_input.c 8.12 (Berkeley) 5/24/95
* $Id: tcp_input.c,v 1.35 1996/01/31 08:22:24 olah Exp $
* $Id: tcp_input.c,v 1.36 1996/02/22 11:46:39 davidg Exp $
*/
#ifndef TUBA_INCLUDE
@ -396,8 +396,10 @@ tcp_input(m, iphlen)
if (so->so_options & SO_ACCEPTCONN) {
register struct tcpcb *tp0 = tp;
so = sonewconn(so, 0);
if (so == 0)
if (so == 0) {
tcpstat.tcps_listendrop++;
goto drop;
}
/*
* This is ugly, but ....
*

3
sys/netinet/tcp_var.h
View File

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* @(#)tcp_var.h 8.4 (Berkeley) 5/24/95
* $Id: tcp_var.h,v 1.27 1996/01/19 08:02:34 peter Exp $
* $Id: tcp_var.h,v 1.28 1996/01/30 22:58:33 mpp Exp $
*/
#ifndef _NETINET_TCP_VAR_H_
@ -289,6 +289,7 @@ struct tcpstat {
u_long tcps_persistdrop; /* timeout in persist state */
u_long tcps_badsyn; /* bogus SYN, e.g. premature ACK */
u_long tcps_mturesent; /* resends due to MTU discovery */
u_long tcps_listendrops; /* listen queue overflows */
};
/*

1
usr.bin/netstat/inet.c
View File

@ -218,6 +218,7 @@ tcp_stats(off, name)
p(tcps_connattempt, "\t%d connection request%s\n");
p(tcps_accepts, "\t%d connection accept%s\n");
p(tcps_badsyn, "\t%d bad connection attempt%s\n");
p(tcps_listendrop, "\t%d listen queue overflow%s\n");
p(tcps_connects, "\t%d connection%s established (including accepts)\n");
p2(tcps_closed, tcps_drops,
"\t%d connection%s closed (including %d drop%s)\n");