Date: Thu, 17 Mar 2011 13:45:14 -0400 From: "J.R. Oldroyd" <fbsd@opal.com> To: freebsd-net@freebsd.org Subject: CFT: IPv6 DNS autoconfiguration (RFC6106 RDNSS and DNSSL) Message-ID: <20110317134514.5f9d52de@shibato.opal.com>
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Folks,
I have implemented IPv6 DNS autoconfiguration using the method described
in RFC6106 which describes RDNSS and DNSSL options on ICMPv6 router advertisements.
This implementation involves:
- updates to rtadvd to send RDDNS and DNSSL options
- updates to rtsold to receive these options
Then, to allow existing dhclient and the new rtsold to update the
/etc/resolv.conf file together, I have also created a new command:
- /sbin/resolvconf - a script to manage resolv.conf updates
and:
- /sbin/dhclient-script patches to use /sbin/resolvconf
Use of resolvconf to update /etc/resolv.conf allows simultaneous use
of dhclient for IPv4 DHCP and rtsold for IPv6 SLAAC.
At the moment, the diffs and new scripts are on this web page:
http://opal.com/jr/freebsd/rdnss/
You'll have to grab the diffs and new scripts and apply and install
by hand.
In this work, I referenced an initial implementation of this for
OpenBSD (and sent feedback to that developer) as well as other work
such as the dns/openresolv port and MC's radns client. The web page
explains why I developed alternatives. The OpenBSD implementation
of the RDNSS and DNSSL options in rtadvd has some differences in
rtadvd.conf parsing; I may add similar functionality to this version
soon. See the web page for details.
Feel free to give it all a try and send feedback.
-jr
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