NetBSD Problem Report #35228
From perry@piermont.com Sun Dec 10 22:42:36 2006
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Date: Sun, 10 Dec 2006 16:07:13 -0500 (EST)
From: perry@piermont.com
Reply-To: perry@piermont.com
To: gnats-bugs@NetBSD.org
Subject: ath and tcpdump don't mix
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>Number: 35228
>Category: kern
>Synopsis: ath and tcpdump don't mix
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: kern-bug-people
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Sun Dec 10 22:45:00 +0000 2006
>Originator: Perry E. Metzger
>Release: NetBSD 4.99.3
>Organization:
Perry E. Metzger perry@piermont.com
--
"Ask not what your country can force other people to do for you..."
>Environment:
System: NetBSD hackworth 4.99.3 NetBSD 4.99.3 (HACKWORTH) #0: Fri Oct 27 14:05:48 EDT 2006 perry@hackworth:/usr/obj/sys/arch/i386/compile/HACKWORTH i386
Architecture: i386
Machine: i386
>Description:
If you do a tcpdump on an ath interface, it quits receiving packets
from the rest of the world, though it doesn't show any apparent
problems if you ifconfig the interface in another window. I suspect
this is a promiscuous mode problem rather than a bpf problem, but I
haven't looked into the details. The interface fails to get back to
normal until you down and up the interface again.
>How-To-Repeat:
Try doing tcpdump on an ath device, say:
tcpdump -n -i ath0 host foo
Then watch as the tcpdump shows packets you send, but no others. Then
notice that all your connections are dead. Then kill the tcpdump --
you will need up and down the ath interface and wait some moments to
get connectivity again.
>Fix:
>Unformatted:
(Contact us)
$NetBSD: query-full-pr,v 1.39 2013/11/01 18:47:49 spz Exp $
$NetBSD: gnats_config.sh,v 1.8 2006/05/07 09:23:38 tsutsui Exp $
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