Bug #23357 for dhcp-public: dhclient -6 doesn't handle addr declines [client] [protocol]

Tue, 22 Feb 2011 19:48:55 -0500 Paul Ebersman <ebersman@isc.org> - Ticket created

Subject:

dhclient -6 script doesn't handle addr declines

the dhclient -6 scripts don't handle declines of offered addrs

Tue, 08 Mar 2011 11:26:22 -0500 Timothy Carlin <tjcarlin@iol.unh.edu> - Ticket #23574: - Ticket created

Subject:	dhclient -6 Decline
Date:	Tue, 8 Mar 2011 11:26:09 -0500
To:	dhcp-bugs@isc.org
From:	Timothy Carlin <tjcarlin@iol.unh.edu>

Hello All, Sorry to trouble you again. I have another question regarding the ISC dhclient, when used for acquiring an IPv6 address. The version I am using is the latest from the website, and is reporting isc-dhclient-4.2.1. It seems that the client is not generating a DHCPv6 Decline message when an IPv6 Address has been duplicated on the link. What appears to happen is, despite the kernel rejecting the binding of the address, dhclient continues on, and in fact attempts to Renew the address when T1 expires. It seems that in my configuration the "dhclient-script" is correctly returning the error code of 3 from "exit_with_hooks", indicating that it determined the address was duplicated. From there I am not sure if dhclient is processing the return code, or if there is something else happening. Is this currently a known issue with dhclient6 or particular distributions of GNU/Linux? So far I've tried with current releases of OpenSUSE and Fedora distributions. Thanks again for your help. Best Regards, Timothy Carlin ---- Timothy Carlin tjcarlin@iol.unh.edu

Wed, 09 Mar 2011 16:14:05 -0500 Paul Ebersman <ebersman@isc.org> - Ticket #23574: - Correspondence added

On Tue Mar 08 16:26:22 2011, tjcarlin@iol.unh.edu wrote:
> It seems that in my configuration the "dhclient-script" is correctly
> returning the error code of 3 from "exit_with_hooks", indicating
> that it determined the address was duplicated. From there I am not
> sure if dhclient is processing the return code, or if there is
> something else happening.

This is a known issue and there is an existing bug report for it, 23357. I'm merging the tickets.

Thank you for reporting this.

Wed, 09 Mar 2011 16:14:05 -0500 The RT System itself - Ticket #23574: - Status changed from 'new' to 'open'

Wed, 09 Mar 2011 16:14:23 -0500 Paul Ebersman <ebersman@isc.org> - Ticket #23574: - Merged into #23357: dhclient -6 doesn't handle addr declines [client] [protocol]

Wed, 09 Mar 2011 16:14:23 -0500 Paul Ebersman <ebersman@isc.org> - Merged into #23357: dhclient -6 doesn't handle addr declines [client] [protocol]

Wed, 16 Mar 2011 18:09:29 -0400 Shawn Routhier <sar@isc.org> - Dependency by #23183: added

Mon, 25 Apr 2011 15:22:42 -0400 Shawn Routhier <sar@isc.org> - Status changed from 'new' to 'open'

Tue, 04 Feb 2014 23:33:44 -0500 Shawn Routhier <sar@isc.org> - Dependency by #23183: deleted

Tue, 04 Feb 2014 23:33:44 -0500 Shawn Routhier <sar@isc.org> - Dependency by #24720: added

Wed, 05 Mar 2014 18:51:53 -0500 Shawn Routhier <sar@isc.org> - Subject changed from 'dhclient -6 script doesn't handle addr declines' to 'dhclient -6 script doesn't handle addr declines [client] [protocol]'

Thu, 26 Mar 2015 01:31:45 -0400 Shawn Routhier <sar@isc.org> - FinalPriority changed from 'Medium' to 'Low'

Thu, 26 Mar 2015 01:31:45 -0400 Shawn Routhier <sar@isc.org> - Priority changed from 'Medium' to 'Low'

Thu, 26 Mar 2015 01:31:45 -0400 Shawn Routhier <sar@isc.org> - Priority P2 Normal added

Thu, 26 Mar 2015 01:31:45 -0400 Shawn Routhier <sar@isc.org> - Versions Planned 4.3.3 added

Thu, 26 Mar 2015 01:31:55 -0400 Shawn Routhier <sar@isc.org> - Dependency by #24720: deleted

Thu, 26 Mar 2015 22:57:37 -0400 Shawn Routhier <sar@isc.org> - TimeEstimated changed from (no value) to '1440'

Thu, 30 Jul 2015 00:54:46 -0400 Shawn Routhier <sar@isc.org> - Versions Planned 4.3.3 changed to 4.3.4

Wed, 19 Aug 2015 01:42:58 -0400 Shawn Routhier <sar@isc.org> - TimeLeft changed from (no value) to '1440'

Tue, 08 Sep 2015 16:09:23 -0400 Shawn Routhier <sar@isc.org> - Reference by #36966: 4.1.ESV-R4-0Ubuntu5.9 - DHCPv6 DECLINE fails to send after the kernel detects IPv6 duplicated address added

Thu, 21 Apr 2016 12:59:59 -0400 Shawn Routhier <sar@isc.org> - Versions Planned 4.3.4 changed to 4.3.5

Wed, 30 Nov 2016 09:59:51 -0500 Thomas Markwalder <tmark@isc.org> - Versions Planned 4.3.5 changed to 4.3.6

Tue, 20 Jun 2017 15:28:52 -0400 Thomas Markwalder <tmark@isc.org> - Dependency on #21237: [patch] Client should perform DAD and send Decline message when address is found to be in use on the link added

Wed, 21 Jun 2017 06:30:12 -0400 Thomas Markwalder <tmark@isc.org> - Queue changed from #8 to dhcp-public

Fri, 30 Jun 2017 06:38:15 -0400 Thomas Markwalder <tmark@isc.org> - Versions Planned 4.3.6 changed to 4.4.0

Mon, 02 Oct 2017 11:31:32 -0400 Thomas Markwalder <tmark@isc.org> - FinalPriority changed from 'Low' to 'Low'

Mon, 02 Oct 2017 11:31:32 -0400 Thomas Markwalder <tmark@isc.org> - Priority changed from 'Low' to 'Low'

Mon, 02 Oct 2017 11:31:33 -0400 Thomas Markwalder <tmark@isc.org> - TimeEstimated changed from '1440' to (no value)

Mon, 02 Oct 2017 11:31:33 -0400 Thomas Markwalder <tmark@isc.org> - TimeLeft changed from '1440' to (no value)

Fri, 08 Dec 2017 07:32:54 -0500 Thomas Markwalder <tmark@isc.org> - Subject changed from 'dhclient -6 script doesn't handle addr declines [client] [protocol]' to 'dhclient -6 doesn't handle addr declines [client] [protocol]'

Fri, 08 Dec 2017 07:32:54 -0500 Thomas Markwalder <tmark@isc.org> - Status changed from 'open' to 'resolved'

Fri, 08 Dec 2017 07:32:54 -0500 Thomas Markwalder <tmark@isc.org> - Taken

Fri, 08 Dec 2017 07:42:11 -0500 Thomas Markwalder <tmark@isc.org> - Correspondence added

Hello Timothy: Long time coming, but you'll be pleased to learn that dhclient (-6) now generates DECLINEs if the client script returns a 3 indicating a DAD error. This change will be included in our next feature release, 4.4.0, due out Q1 of 2018. We'd like to thank you for suggesting the change by citing you in the release notes. If you wish to recognized in this way, please respond with how you want to be identified. Regards, Thomas Markwalder ISC Software Engineering

Fri, 08 Dec 2017 07:42:12 -0500 The RT System itself - Status changed from 'resolved' to 'open'

Fri, 08 Dec 2017 07:42:25 -0500 Thomas Markwalder <tmark@isc.org> - Status changed from 'open' to 'resolved'

Mon, 11 Dec 2017 08:21:36 -0500 Timothy Carlin <tjcarlin@iol.unh.edu> - Correspondence added

From:	"Timothy Carlin" <tjcarlin@iol.unh.edu>
Subject:	Re: [ISC-Bugs #23357] dhclient -6 doesn't handle addr declines [client] [protocol]
To:	dhcp-public@isc.org
Date:	Mon, 11 Dec 2017 08:20:47 -0500

Hi Thomas,

Thanks very much for passing along the news of this update. Feel free to mention my name and affiliation in the release notes, it would be an honor. I've included it below.

Best Regards,

Timothy Carlin

University of New Hampshire, InterOperability Lab (UNH-IOL)

On Fri, Dec 8, 2017 at 7:42 AM, Thomas Markwalder via RT <dhcp-public@isc.org> wrote:

Hello Timothy:

Long time coming, but you'll be pleased to learn that dhclient (-6) now generates DECLINEs if the client script returns a 3 indicating a DAD error. This change will be included in our next feature release, 4.4.0, due out Q1 of 2018.

We'd like to thank you for suggesting the change by citing you in the release notes. If you wish to recognized in this way, please respond with how you want to be identified.

Regards,

Thomas Markwalder
ISC Software Engineering

Mon, 11 Dec 2017 08:21:37 -0500 The RT System itself - Status changed from 'resolved' to 'open'

Mon, 11 Dec 2017 09:42:21 -0500 Thomas Markwalder <tmark@isc.org> - Status changed from 'open' to 'resolved'

Created:	Tue, 22 Feb 2011 19:48:54 -0500
Updated:	Mon, 11 Dec 2017 09:42:21 -0500
Closed:	Mon, 11 Dec 2017 09:42:21 -0500

Bug #23357 for dhcp-public: dhclient -6 doesn't handle addr declines [client] [protocol]

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