Your message dated Wed, 05 Aug 2026 17:31:09 +0000 with message-id <[email protected]> and subject line Bug#1143544: Removed package(s) from unstable has caused the Debian Bug report #955825, regarding isc-dhcp-client: wrong ipv6 prefix length 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. (NB: If you are a system administrator and have no idea what this message is talking about, this may indicate a serious mail system misconfiguration somewhere. Please contact [email protected] immediately.) -- 955825: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=955825 Debian Bug Tracking System Contact [email protected] with problems
--- Begin Message ---Package: isc-dhcp-client Version: 4.3.1-6+deb8u4 Severity: important Tags: ipv6 Requesting an address with dhclient over dhcp6 does not always set the ipv6 prefix length right. The address received seems always to get a /128 prefix set, even if the dhcp6 server sends another one. I would expect dhclient to set the prefix lenght, if the dhcp6 server sends one. The code in /sbin/dhclient-script under the relevant section "### DHCPv6 Handlers" is the same in Devuan Jessie, where I used reportbug to write this bug, Debian Stretch (4.3.5-3+deb9u1) and in Debian Sid (4.4.1-2.1+b2). In the code that does set the ipv6 address using iproute2 there is no prefix mentioned at all. 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 ${interface} scope global 390 fi It could be that /sbin/dhclient should set the prefix to the address, I don't know. This part has two problems: It should also be called upon reason REBOOT6 (see man dhclient-script(8)) and it should set the prefix if one was given (and not already present with the address). Something like the following would help: 385 BOUND6|RENEW6|REBIND6|REBOOT6) 386 if [ "${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 398 fi What really confuses me, is that ISC did change the IPv6 handling in the dhclient-script, but it is not brought to Debian. In the upstream version they call a function "add_ipv6_addr_with_DAD". So I guess, the bug is not present there. If I watch at the source package of 4.4.1-2.1, I do see the upstream changes, but they are not present in the script that the binary package of 4.4.1-2.1+b2 delivers. Sorry, I don't understand what's going on here. Thank you for your help. Regards, Adrian. -- System Information: Debian Release: 7.11 Architecture: amd64 (x86_64) Kernel: Linux 3.16.0-10-amd64 (SMP w/4 CPU cores) Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/bash Init: sysvinit (via /sbin/init) Versions of packages isc-dhcp-client depends on: ii debianutils 4.4+b1 ii iproute2 3.16.0-2 ii isc-dhcp-common 4.3.1-6+deb8u4 ii libc6 2.19-18+deb8u10 ii libdns-export100 1:9.9.5.dfsg-9+deb8u18 ii libirs-export91 1:9.9.5.dfsg-9+deb8u18 ii libisc-export95 1:9.9.5.dfsg-9+deb8u18 isc-dhcp-client recommends no packages. Versions of packages isc-dhcp-client suggests: pn avahi-autoipd <none> pn resolvconf <none> -- no debconf information
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--- Begin Message ---Version: 4.4.3-P1-8+rm Dear submitter, as the package isc-dhcp has just been removed from the Debian archive unstable we hereby close the associated bug reports. We are sorry that we couldn't deal with your issue properly. For details on the removal, please see https://bugs.debian.org/1143544 The version of this package that was in Debian prior to this removal can still be found using https://snapshot.debian.org/. Please note that the changes have been done on the master archive and will not propagate to any mirrors until the next dinstall run at the earliest. This message was generated automatically; if you believe that there is a problem with it please contact the archive administrators by mailing [email protected]. Debian distribution maintenance software pp. Thorsten Alteholz (the ftpmaster behind the curtain)
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