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Bug#690889: marked as done (udhcpc always returns a domain of "bad" when receiving a valid dhcp ack packet)

Your message dated Mon, 5 Feb 2018 14:40:19 +0100
with message-id <7fcb4974-b15e-e9de-74b6-6b8b83c74542@debian.org>
and subject line Re: Bug#690889: udhcpc always returns a domain of "bad" when receiving a valid dhcp ack packet
has caused the Debian Bug report #690889,
regarding udhcpc always returns a domain of "bad" when receiving a valid dhcp ack packet
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
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immediately.)


-- 
690889: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=690889
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: udhcpc
Version: :1.20.0-7
Severity: normal
Tags: d-i

udhcpc always returns a domain of "bad" when receiving a valid dhcp ack
from an upstream dhcp server. To reproduce first create a shellscript to
dump all of the variables set by udhcpc uppon successful receipt of a lease:

echo '#!/bin/sh' > /tmp/export.sh
echo 'export' >> /tmp/export.sh
chmod +x /tmp/export.sh

Then call udhcpc with flags set to call the script:

/sbin/udhcpc -s /tmp/export.sh

In my environment with a known good/working isc-dhcpd config, the output is:

 /tmp/udhcpc -s /tmp/sh.sh
udhcpc (v1.20.2) started
export BOOT_IMAGE='debian-installer/amd64/linux.wheezy'
export HOME='/'
export LANG='C'
export LANGUAGE='en'
export MENU='/usr/bin/main-menu'
export PATH='/sbin:/usr/sbin:/bin:/usr/bin'
export PWD='/'
export SHELL='/bin/sh'
export SHLVL='1'
export TERM='vt102'
export TERM_TYPE='serial'
export USER='root'
export _='/tmp/udhcpc'
export initrd='debian-installer/amd64/initrd-wheezy-isc.gz'
export interface='eth0'
Sending discover...
Sending select for 10.30.109.62...
Lease of 10.30.109.62 obtained, lease time 600
export BOOT_IMAGE='debian-installer/amd64/linux.wheezy'
export HOME='/'
export LANG='C'
export LANGUAGE='en'
export MENU='/usr/bin/main-menu'
export PATH='/sbin:/usr/sbin:/bin:/usr/bin'
export PWD='/'
export SHELL='/bin/sh'
export SHLVL='1'
export TERM='vt102'
export TERM_TYPE='serial'
export USER='root'
export _='/tmp/udhcpc'
export boot_file='pxelinux.0'
export broadcast='10.30.109.255'
export dns='10.10.80.10 10.10.80.11'
export domain='bad'
export hostname='systest-2'
export initrd='debian-installer/amd64/initrd-wheezy-isc.gz'
export interface='eth0'
export ip='10.30.109.62'
export lease='600'
export mask='24'
export opt53='05'
export router='10.30.109.254'
export serverid='10.30.10.20'
export siaddr='10.30.10.20'
export subnet='255.255.255.0'

I've tcpdumped both the client and server side of the dhcp exchange and
wireshark decodes the full ack packet as a valid dhcp/bootp ack AND includes
the correct domainname as configured to be sent on the server.

Testing with isc-dhcp-client also yields a successful lease with the correct
domain name set.

The major problem with this bug is that when using debian installer the
network config generated is always invalid. The domain-name cannot be set
in preseed either since the d-i logic in netcfg always give precedence to
values received from dhcp.

-- System Information:
Debian Release: wheezy/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 3.2.0-3-amd64
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
Shell: /bin/sh linked to /bin/dash

--- End Message ---
--- Begin Message --- 
Version: 1:1.27.2-1

Hi,

The fix for this bug (commit 8efcc9589bd61171ec1fe4f71c33e9df62b6005b,
"networking: allow dot at the end of the domain name in dhcp response")
was included in the Busybox 1.25.0 upstream release, and therefore
included in the Debian upload for 1:1.27.2-1 back in September.

Best regards,
Chris

-- 
Chris Boot
bootc@debian.org

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