Package: dhcpcd
Version: 1:9.4.1-24~deb12u4
Severity: normal
X-Debbugs-Cc:
dxld@darkboxed.org
Hi Martin,
I have the following RAs on my network including multiple DNSSL
options. According to [RFC 8106 section 5.2]
If it is desirable to have different Lifetime values, multiple DNSSL
options can be used.
[RFC 8106]:
https://datatracker.ietf.org/doc/html/rfc8106#section-5.2
So this should be supported. However dhcpcd doesn't merge the
lists only installing the first one in /etc/resolv.conf:
search rack.dxld.at dyn.dxld.at pub.dxld.at
I tested against rdnssd (after undoing dhcpcd's sysctl mangling [#266]
another issue we'll have to deal with later) and it get's it right.
Looking at /var/run/rdnssd/resolv.conf:
search rack.dxld.at dyn.dxld.at pub.dxld.at inn.dxld.at
[#266]:
https://github.com/NetworkConfiguration/dhcpcd/issues/266
Except... I actually wanted a different order, but we can't have
everything as that seems to be RFC compliant :-)
6.3. Synchronization between DNS Search List and Resolver Repository
When an IPv6 host receives the information of multiple DNSSL domain
names within a network through an RA message with DNSSL option(s), it
stores the DNSSL domain names (in order) in both the DNSSL and the
Resolver Repository.
RAs look like this:
```
# rdisc6 br0
Soliciting ff02::2 (ff02::2) on br0...
Hop limit : 64 ( 0x40)
Stateful address conf. : Yes
Stateful other conf. : No
Mobile home agent : No
Router preference : medium
Neighbor discovery proxy : No
Router lifetime : 1800 (0x00000708) seconds
Reachable time : unspecified (0x00000000)
Retransmit time : unspecified (0x00000000)
MTU : 1500 bytes (valid)
Prefix : 2001:678:4d8::/64
On-link : Yes
Autonomous address conf.: Yes
Valid time : 86400 (0x00015180) seconds
Pref. time : 14400 (0x00003840) seconds
Recursive DNS server : 2001:678:4d8:acdd::1
DNS server lifetime : 1800 (0x00000708) seconds
DNS search list : rack.dxld.at dyn.dxld.at pub.dxld.at
DNS search list lifetime: 1800 (0x00000708) seconds
DNS search list : inn.dxld.at
DNS search list lifetime: 1800 (0x00000708) seconds
from fe80::debb
```
I'll test this against dhcpcd from unstable later.
--Daniel
-- System Information:
Debian Release: 12.9
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable-debug'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 6.1.0-18-amd64 (SMP w/32 CPU threads; PREEMPT)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=en Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages dhcpcd depends on:
ii dhcpcd-base 9.4.1-24~deb12u4
ii lsb-base 11.6
ii sysvinit-utils [lsb-base] 3.06-4
dhcpcd recommends no packages.
Versions of packages dhcpcd suggests:
pn dhcpcd-gtk <none>
-- no debconf information
--- SoupGate-Win32 v1.05
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