Re: Trying to add inet6 address w/o inet6 support resets interface configuration

["Scott Ellis" <scotte%warped.com@localhost>]

On Mon, May 19, 2008 11:04 am, David Young wrote:
> On Mon, May 19, 2008 at 09:33:01AM -0700, Scott Ellis wrote:
>> On Mon, May 19, 2008 9:29 am, David Young wrote:
>> > On Sat, May 17, 2008 at 12:44:15PM -0700, Scott Ellis wrote:
>> >> I noticed this on the May 5th kernel+userland, and just now got a
>> chance
>> >> to try it on today's kernel+userland.
>> >>
>> >> I always build my systems w/o INET6 (no need for it yet).
>> >> Unfortunately, after boot, lo0 isn't configured.  Turns out running
>> >> "ifconfig lo0 inet6" (as is done twice in rc.d/network) results in a
>> >> SIOCAIFADDR error, that removes the configuration entirely. :-(
>> >>
>> >> For example...
>> >>
>> >> intrepid{~}# ifconfig lo0
>> >> lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 33648
>> >>         inet 127.0.0.1 netmask 0xff000000
>> >> intrepid{~}# ifconfig lo0 inet6
>> >> lo0: SIOCAIFADDR: Address family not supported by protocol family
>> >
>> > On intrepid, what domain name does 'inet6' resolve to?
>>
>> That's a weird question. :-) I'm using OpenDNS, so I get:
>>
>> intrepid{~}% nslookup inet6
>> Server:         127.0.0.1
>> Address:        127.0.0.1#53
>>
>> Non-authoritative answer:
>> Name:   inet6.warped.com
>> Address: 208.67.219.132
>>
>> Is that what you wanted to know?
>
> Yes.  I have just committed a fix for a related bug, but it looks to
> me like ifconfig may be working correctly in this case.  How do you
> build your userland?  Do you use any MKxxxx or USExxxx options, such as
> MKINET6=no or USE_INET6=no?

Yeah, MKINET6=no and no inet6 in the kernel (hence the SIOCAIFADDR from
ifconfig).  The full list of MK* for my build is:

MKDOC=no
MKLINT=no
MKINFO=no
MKPROFILE=no
MKKERBEROS=no
MKKERBEROS4=no
MKHESIOD=no
MKSKEY=no
MKYP=no
MKSENDMAIL=no
MKPOSTFIX=no
MKINET6=no
MKIPFILTER=no
MKX11=no