Date: Fri, 4 Aug 2023 17:07:46 +0100 From: Graham Perrin <grahamperrin@freebsd.org> To: freebsd-net@frebsd.org Cc: FreeBSD CURRENT <freebsd-current@freebsd.org> Subject: Fwd: Unreliability with DHCP Message-ID: <e5e80c42-08c3-140b-b53b-a13ffbf01ff7@freebsd.org> In-Reply-To: <62d300c8-2c3e-58fa-334e-23a17962279a@freebsd.org> References: <62d300c8-2c3e-58fa-334e-23a17962279a@freebsd.org>
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From: Graham Perrin <grahamperrin@freebsd.org>
To: freebsd-net@frebsd.org
Cc: FreeBSD CURRENT <freebsd-current@freebsd.org>
Message-ID: <e5e80c42-08c3-140b-b53b-a13ffbf01ff7@freebsd.org>
Subject: Fwd: Unreliability with DHCP
References: <62d300c8-2c3e-58fa-334e-23a17962279a@freebsd.org>
In-Reply-To: <62d300c8-2c3e-58fa-334e-23a17962279a@freebsd.org>
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<body style=3D"padding-bottom: 1px;">
<p>Can anyone from freebsd-net@ help?<br>
</p>
<div class=3D"moz-forward-container"><br>
-------- Forwarded Message --------
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<tbody>
<tr>
<th valign=3D"BASELINE" nowrap=3D"nowrap" align=3D"RIGHT">Sub=
ject:
</th>
<td>Unreliability with DHCP</td>
</tr>
<tr>
<th valign=3D"BASELINE" nowrap=3D"nowrap" align=3D"RIGHT">Dat=
e: </th>
<td>Sun, 30 Jul 2023 16:17:43 +0100</td>
</tr>
<tr>
<th valign=3D"BASELINE" nowrap=3D"nowrap" align=3D"RIGHT">Fro=
m: </th>
<td>Graham Perrin <a class=3D"moz-txt-link-rfc2396E" href=3D"=
mailto:grahamperrin@freebsd.org"><grahamperrin@freebsd.org></a></td=
>
</tr>
<tr>
<th valign=3D"BASELINE" nowrap=3D"nowrap" align=3D"RIGHT">Org=
anisation:
</th>
<td>FreeBSD</td>
</tr>
<tr>
<th valign=3D"BASELINE" nowrap=3D"nowrap" align=3D"RIGHT">To:=
</th>
<td>FreeBSD CURRENT <a class=3D"moz-txt-link-rfc2396E" href=3D=
"mailto:freebsd-current@freebsd.org"><freebsd-current@freebsd.org><=
/a></td>
</tr>
</tbody>
</table>
<br>
<br>
<p><span style=3D"font-family:monospace"><span
style=3D"color:#000000;background-color:#ffffff;">1. Sleep
(suspend) whilst connected to one network</span></span></p>
<p><span style=3D"font-family:monospace"><span
style=3D"color:#000000;background-color:#ffffff;">2. connect
to a network elsewhere</span></span></p>
<p><span style=3D"font-family:monospace"><span
style=3D"color:#000000;background-color:#ffffff;">3. wake
(resume).</span></span></p>
<p><span style=3D"font-family:monospace"><span
style=3D"color:#000000;background-color:#ffffff;">Result: <br=
>
</span></span></p>
<p><span style=3D"font-family:monospace"><span
style=3D"color:#000000;background-color:#ffffff;">/etc/resolv=
=2Econf
frequently contains outdated information. In some (maybe
all) such cases, the IPv4 </span></span><span
style=3D"font-family:monospace"><span
style=3D"color:#000000;background-color:#ffffff;"><span
style=3D"font-family:monospace"><span
style=3D"color:#000000;background-color:#ffffff;">inet
address is outdated; and so on. <br>
</span></span></span></span></p>
<p><span style=3D"font-family:monospace"><span
style=3D"color:#000000;background-color:#ffffff;"><span
style=3D"font-family:monospace">Which </span></span></span>=
<span
style=3D"font-family:monospace"><span
style=3D"color:#000000;background-color:#ffffff;">/etc/rc.d/
file(s) should I attempt to fix?</span></span></p>
<p><span style=3D"font-family:monospace"><span
style=3D"color:#000000;background-color:#ffffff;">I imagine
using the resume keyword, which is currently used by only
one script: <br>
</span></span></p>
<p><span style=3D"font-family:monospace"><span
style=3D"color:#000000;background-color:#ffffff;">% rcorder -=
k
resume /etc/rc.d/* </span><br>
/etc/rc.d/ntpd <br>
% <br>
</span><span style=3D"font-family:monospace"><span
style=3D"color:#000000;background-color:#ffffff;"></span></sp=
an></p>
<p><span style=3D"font-family:monospace"><br>
</span></p>
<p><span style=3D"font-family:monospace">I routinely run the comman=
d
below to work around the bug (and observe the states of
things) =E2=80=93 run _after_ the bug bites. I'd prefer a fix, =
to
prevent the bites. <br>
</span></p>
<p><span style=3D"font-family:monospace"><span
style=3D"color:#000000;background-color:#ffffff;">ls
/var/run/resolvconf/interfaces/ ; route delete default ;
ifconfig wlan0 down && ifconfig em0 down &&
sleep 5 ; ls /var/run/resolvconf/interfaces/ ; ifconfig em0
up && sleep 15</span><br>
; ls /var/run/resolvconf/interfaces/ ; cat /etc/resolv.conf ;
ping -c 2 -4 freshports.org<br>
</span><span style=3D"font-family:monospace"></span><span
style=3D"font-family:monospace"></span></p>
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