Devuan bug report logs -
#421
isc-dhcp-client: no ipv6 prefix set automatically
Reported by: Adrian Zaugg <adi@ente.limmat.ch>
Date: Sat, 4 Apr 2020 21:18:02 UTC
Severity: normal
Tags: debian
Found in version 4.3.5-3+deb9u1
Done: Mark Hindley <mark@hindley.org.uk>
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Your message dated Mon, 6 Apr 2020 09:59:40 +0100
with message-id <20200406085940.GA25042@hindley.org.uk>
and subject line Re: reported to Debian under #955825
has caused the Devuan bug report #421,
regarding isc-dhcp-client: no ipv6 prefix set automatically
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.
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--
421: https://bugs.devuan.org/cgi/bugreport.cgi?bug=421
Devuan Bug Tracking System
Contact owner@bugs.devuan.org with problems
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Package: isc-dhcp-client
Version: 4.3.5-3+deb9u1
Severity: important
Requesting an address over dhcp6 does not set the ipv6 prefix length. The address received seems always get
a /128 prefix set, even if the dhcp6 server sends another one.
I expect dhclient to set the prefix lenght, if the dhcp6 server sends one.
The code in /sbin/dhclient-script under "### DHCPv6 Handlers" is the same in ascii and Debian/unstable (4.4.1-2.1+b2).
It has a mark "TODO: handle prefix change: ?based on ${old_ip6_prefix} and ${new_ip6_prefix}?"... In the code that
does set the ipv6 address using iproute2 there is no prefix mentioned. See line 385 and the following:
385 BOUND6|RENEW6|REBIND6)
386 if [ "${new_ip6_address}" ]; then
387 # set leased IP
388 ip -6 addr add ${new_ip6_address} \
389 dev ${interface} scope global
390 fi
This part has two problems: It should also be called upon reason REBOOT6 (see dhclient-script(8)) and it
should set the prefix if one was given. I suggest to change this to:
385 BOUND6|RENEW6|REBIND6|REBOOT6)
386 if [ "${new_ip6_address}" ]; then
387
388 # check wether a prefix was passed and add it to the address
389 if [ -n "$new_ip6_prefixlen" ]; then
390 new_ip6_address_and_prefix="${new_ip6_address}/${new_ip6_prefixlen}"
391 else
392 new_ip6_address_and_prefix="${new_ip6_address}"
393 fi
394
395 # set leased IP
396 ip -6 addr add ${new_ip6_address_and_prefix} \
397 dev ${interface} scope global
According to my tests this resolves the problem. Please review.
Regards, Adrian.
-- System Information:
Distributor ID: Devuan
Description: Devuan GNU/Linux 2.1 (ascii)
Release: 2.1
Codename: ascii
Architecture: x86_64
Kernel: Linux 4.9.0-12-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)
Versions of packages isc-dhcp-client depends on:
ii debianutils 4.8.1.1
ii iproute2 4.9.0-1+deb9u1
ii libc6 2.24-11+deb9u4
ii libdns-export162 1:9.10.3.dfsg.P4-12.3+deb9u5
ii libisc-export160 1:9.10.3.dfsg.P4-12.3+deb9u5
Versions of packages isc-dhcp-client recommends:
ii isc-dhcp-common 4.3.5-3+deb9u1
Versions of packages isc-dhcp-client suggests:
pn avahi-autoipd <none>
pn isc-dhcp-client-ddns <none>
ii resolvconf 1.79
-- Configuration Files:
/etc/dhcp/debug changed [not included]
-- no debconf information
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On Sun, 5 Apr 2020 13:58:54 +0200 Adrian Zaugg <adi@ente.limmat.ch> wrote:
>
> Could you please close this bug, I reported it to Debian directly. You
> can find it under #955825 [1]. Thank you.
>
>
> [1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=955825
Thanks.
Closing here.
Mark
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