Date: Thu, 16 Jun 2005 13:16:46 -0700 From: Brooks Davis <brooks@one-eyed-alien.net> To: Sam Leffler <sam@errno.com> Cc: current@freebsd.org Subject: Re: New dhclient broke multiple domains in domain-name Message-ID: <20050616201646.GC13900@odin.ac.hmc.edu> In-Reply-To: <42B1D823.5030108@errno.com> References: <200506161312.51857.jhb@FreeBSD.org> <42B1D823.5030108@errno.com>
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On Thu, Jun 16, 2005 at 12:50:59PM -0700, Sam Leffler wrote:
> John Baldwin wrote:
> >[ Apologies if this has already been brought up, I'm still 1800 messages
> >behind on current@. ]
> >
> >A feature of both the old and new dhclient(8) is that it would take
> >whatever was in the domain-name option returned by the DHCP server and
> >stick it in the 'search' line in /etc/resolv.conf. Thus, if you wanted to
> >have DNS search multiple domains, you could just pass a space separated
> >list of domains to search in domain-name and it would just work. I've
> >made use of this "feature" in several different environments in the past
> >including my current test lab. It's even used in the example
> >dhclient.conf in dhclient.conf(5):
> >
> > interface "ep0" {
> > send host-name "andare.fugue.com";
> > send dhcp-client-identifier 1:0:a0:24:ab:fb:9c;
> > send dhcp-lease-time 3600;
> > supersede domain-name "fugue.com rc.vix.com home.vix.com";
> > prepend domain-name-servers 127.0.0.1;
> > ...
> > }
> >
> >The new dhclient is barfing on my domain-name setting now because it
> >doesn't look like a domain name:
> >
> >Setting hostname: deimos.baldwin.cx.
> >fxp0: link state changed to UP
> >DHCPDISCOVER on fxp0 to 255.255.255.255 port 67 interval 8
> >DHCPOFFER from 192.168.0.1
> >Bogus Host Name option 15: baldwin.cx freebsd.org atl.weather.com
> >(baldwin.cx freebsd.org atl.weather.com)
> >Invalid lease option - ignoring offer
> >packet_to_lease failed.
> >DHCPDISCOVER on fxp0 to 255.255.255.255 port 67 interval 10
> >DHCPOFFER from 192.168.0.1
> >Bogus Host Name option 15: baldwin.cx freebsd.org atl.weather.com
> >(baldwin.cx freebsd.org atl.weather.com)
> >Invalid lease option - ignoring offer
> >packet_to_lease failed.
> >...
> >
> >I'd very much like the old behavior restored if possible, or an
> >alternative way to achieve the same result (multiple domains in the
> >'search' part of /etc/resolv.conf). Note that the old domain-name trick
> >has worked all the way back to at least 4.1 and maybe even back in the 3.x
> >days IIRC.
> >
>
> Known issue being worked on. You're actually violating the spec but I
> know that's less important than having a way to do what you want.
The RFC is shockingly lacking in this area. It's rather odd that they
send a value for domain, but not for search (in resolv.conf). It's not
suprising that people ended up abusing this to set search.
-- Brooks
--
Any statement of the form "X is the one, true Y" is FALSE.
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