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bin/43968: add "segqlen" to tcp_dump of netstat(1)

>Number:         43968
>Category:       bin
>Synopsis:       add "segqlen" to tcp_dump of netstat(1)
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    bin-bug-people
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Thu Oct 14 07:50:01 +0000 2010
>Release:        NetBSD 5.0.1
Internet Initiative Japan Inc.
System: NetBSD 5.0.1 NetBSD 5.0.1 (GENERIC) #0: Thu Jul 30
01:39:11 UTC 2009
Architecture: i386
Machine: i386

Usage of TCP segment queue is useful for debugging.
The diff is to add 'segqlen' of TCPCB to 'netstat -P'.

Index: inet.c
RCS file: /cvsroot/NetBSD/src/usr.bin/netstat/inet.c,v
retrieving revision 1.92
diff -u -p -r1.92 inet.c
--- inet.c      7 Dec 2009 18:48:45 -0000       1.92
+++ inet.c      14 Oct 2010 05:06:55 -0000
@@ -946,8 +946,8 @@ tcp_dump(u_long pcbaddr)
        printf("rxtshift %d, rxtcur %d, dupacks %d\n", tcpcb.t_rxtshift,
            tcpcb.t_rxtcur, tcpcb.t_dupacks);
-       printf("peermss %u, ourmss %u, segsz %u\n\n", tcpcb.t_peermss,
-           tcpcb.t_ourmss, tcpcb.t_segsz);
+       printf("peermss %u, ourmss %u, segsz %u, segqlen %u\n\n",
+           tcpcb.t_peermss, tcpcb.t_ourmss, tcpcb.t_segsz, tcpcb.t_segqlen);
        printf("snd_una %u, snd_nxt %u, snd_up %u\n",
            tcpcb.snd_una, tcpcb.snd_nxt, tcpcb.snd_up);

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