From www@isc.org Wed Oct 5 10:37:17 2016 MIME-Version: 1.0 X-Spam-Status: No, score=-3.3 required=5.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,RP_MATCHES_RCVD,UNPARSEABLE_RELAY autolearn=ham autolearn_force=no version=3.4.0 X-Mailer: PHPMailer 5.2.14 (https://github.com/PHPMailer/PHPMailer) content-type: text/plain; charset="utf-8" Message-ID: <23aecc61927e635b01d558cee361393a@www.isc.org> Received: from mx.pao1.isc.org (mx.pao1.isc.org [149.20.64.53]) by bugs.isc.org (Postfix) with ESMTP id 89AA871B5A8 for ; Wed, 5 Oct 2016 10:37:17 +0000 (UTC) Received: from iscwebprod.isc.org (iscwebprod.isc.org [IPv6:2001:4f8:1:d::16]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx.pao1.isc.org (Postfix) with ESMTPS id C999A3494EF for ; Wed, 5 Oct 2016 10:37:13 +0000 (UTC) Received: from www (uid 80) (envelope-from www@iscwebprod.isc.org) id 7b7d78 by iscwebprod.isc.org (DragonFly Mail Agent v0.11); Wed, 05 Oct 2016 10:37:13 +0000 Delivered-To: dhcp-bugs@bugs.isc.org Subject: isc-dhclient-4.3.4 and isc-dhclient-4.3.5b1 - environment variable $new_expiry wrong for very high lease time Return-Path: X-Original-To: dhcp-bugs@bugs.isc.org Date: Wed, 5 Oct 2016 10:37:13 +0000 X-Wpcf7-Content-Type: text/plain X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on mx.pao1.isc.org X-PHP-Originating-Script: 80:class-phpmailer.php To: dhcp-bugs@isc.org Content-Transfer-Encoding: 8bit From: "Dominique Jullier" X-RT-Original-Encoding: utf-8 X-RT-Interface: Email Content-Length: 5905 Bug Report from www.isc.org: Name: Dominique Jullier Email: doj@open.ch Software Version: isc-dhclient-4.3.4 and isc-dhclient-4.3.5b1 OS: Linux from Scratch Subject:environment variable $new_expiry wrong for very high lease time Bug Detail =========== On Azure, the dhcp server offers a lease time of ~135 years, which seems to cause some issues. There was a bug report a couple of years ago for various distros: http://pkgs.fedoraproject.org/cgit/rpms/dhcp.git/commit/?id=bd413ec3f9585ff8ccb8a5a66097fab53a8f5fe4 Looks a bit like I'm hitting the same error again (regression?): # /opt/OSAGdhcp/sbin/dhclient -v eth1 Internet Systems Consortium DHCP Client 4.3.4 Copyright 2004-2016 Internet Systems Consortium. All rights reserved. For info, please visit https://www.isc.org/software/dhcp/ Listening on LPF/eth1/00:0d:3a:24:12:91 Sending on LPF/eth1/00:0d:3a:24:12:91 Sending on Socket/fallback DHCPREQUEST on eth1 to 255.255.255.255 port 67 DHCPACK from 168.63.129.16 Unable to set up timer: out of range If you think you have received this message due to a bug rather than a configuration issue please read the section on submitting bugs on either our web page at www.isc.org or in the README file before submitting a bug. These pages explain the proper process and the information we find helpful for debugging.. exiting. I applied then the patch recommended in the bug report in 2012 mentioned above: ... ++ */ ++ if (sec > TIME_MAX) ++ sec = TIME_MAX - 9; ++ ++ isc_interval_set(&interval, sec, usec * 1000); ... This solved the issue for the first moment: [obsd:~]# /opt/OSAGdhcp/sbin/dhclient -v eth1 Internet Systems Consortium DHCP Client 4.3.5b1 Copyright 2004-2016 Internet Systems Consortium. All rights reserved. For info, please visit https://www.isc.org/software/dhcp/ Listening on LPF/eth1/00:0d:3a:24:12:91 Sending on LPF/eth1/00:0d:3a:24:12:91 Sending on Socket/fallback DHCPREQUEST on eth1 to 255.255.255.255 port 67 DHCPACK from 168.63.129.16 bound to 10.0.1.200 -- renewal in 4294967295 seconds. All looks seemingly good, but unfortunately, the variable $new_expiry passed over to the dhclient-script does not contain 4294967295 as expected (see also output above) but the current time. Interestingly, in the dhclient.leases file the value is again correct. tcpdump: # tcpdump -ni eth1 port 67 or port 68 -vvvv tcpdump: listening on eth1, link-type EN10MB (Ethernet), capture size 262144 bytes 12:34:25.696665 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 328) 0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from 00:0d:3a:24:12:91, length 300, xid 0xc01d6b3c, Flags [none] (0x0000) Client-Ethernet-Address 00:0d:3a:24:12:91 Vendor-rfc1048 Extensions Magic Cookie 0x63825363 DHCP-Message Option 53, length 1: Discover Parameter-Request Option 55, length 7: Subnet-Mask, BR, Time-Zone, Default-Gateway Domain-Name, Domain-Name-Server, Hostname END Option 255, length 0 PAD Option 0, length 0, occurs 47 12:34:25.710260 IP (tos 0x0, ttl 255, id 53331, offset 0, flags [none], proto UDP (17), length 367) 168.63.129.16.67 > 255.255.255.255.68: [no cksum] BOOTP/DHCP, Reply, length 339, hops 1, xid 0xc01d6b3c, Flags [Broadcast] (0x8000) Your-IP 10.0.1.200 Server-IP 168.63.129.16 Gateway-IP 168.63.129.16 Client-Ethernet-Address 00:0d:3a:24:12:91 sname "RD7CFE90D2F502" Vendor-rfc1048 Extensions Magic Cookie 0x63825363 Subnet-Mask Option 1, length 4: 255.255.255.0 Domain-Name-Server Option 6, length 4: 168.63.129.16 Domain-Name Option 15, length 51: "n0asurwq3bsufpahkrhd2d4cfe.ax.internal.cloudapp.net" Lease-Time Option 51, length 4: 4294967295 DHCP-Message Option 53, length 1: Offer Server-ID Option 54, length 4: 168.63.129.16 RN Option 58, length 4: 4294967295 RB Option 59, length 4: 4294967295 T245 Option 245, length 4: 2822734096 END Option 255, length 0 12:34:25.710746 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 328) 0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from 00:0d:3a:24:12:91, length 300, xid 0xc01d6b3c, Flags [none] (0x0000) Client-Ethernet-Address 00:0d:3a:24:12:91 Vendor-rfc1048 Extensions Magic Cookie 0x63825363 DHCP-Message Option 53, length 1: Request Server-ID Option 54, length 4: 168.63.129.16 Requested-IP Option 50, length 4: 10.0.1.200 Parameter-Request Option 55, length 7: Subnet-Mask, BR, Time-Zone, Default-Gateway Domain-Name, Domain-Name-Server, Hostname END Option 255, length 0 PAD Option 0, length 0, occurs 35 12:34:25.722133 IP (tos 0x0, ttl 255, id 54611, offset 0, flags [none], proto UDP (17), length 367) 168.63.129.16.67 > 255.255.255.255.68: [no cksum] BOOTP/DHCP, Reply, length 339, hops 1, xid 0xc01d6b3c, Flags [Broadcast] (0x8000) Your-IP 10.0.1.200 Server-IP 168.63.129.16 Gateway-IP 168.63.129.16 Client-Ethernet-Address 00:0d:3a:24:12:91 sname "RD7CFE90D2F502" Vendor-rfc1048 Extensions Magic Cookie 0x63825363 Subnet-Mask Option 1, length 4: 255.255.255.0 Domain-Name-Server Option 6, length 4: 168.63.129.16 Domain-Name Option 15, length 51: "n0asurwq3bsufpahkrhd2d4cfe.ax.internal.cloudapp.net" Lease-Time Option 51, length 4: 4294967295 DHCP-Message Option 53, length 1: ACK Server-ID Option 54, length 4: 168.63.129.16 RN Option 58, length 4: 4294967295 RB Option 59, length 4: 4294967295 T245 Option 245, length 4: 2822734096 END Option 255, length 0 Thanks for having a look at this issue and let me know if you need more information. Dominique Jullier --- This email was received through isc.org Bug Submission Form All information within this email is considered confidential and for internal use only.