Date: Mon, 23 Jul 2001 19:38:36 +0100 From: Brian Somers <brian@Awfulhak.org> To: Hajimu UMEMOTO <ume@mahoroba.org> Cc: brian@Awfulhak.org, brian@FreeBSD.org, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org, brian@Awfulhak.org Subject: Re: cvs commit: src/lib/libutil realhostname.c Message-ID: <200107231838.f6NIcag68156@hak.lan.Awfulhak.org> In-Reply-To: Message from Hajimu UMEMOTO <ume@mahoroba.org> of "Tue, 24 Jul 2001 03:23:44 %2B0900." <20010724.032344.71142385.ume@mahoroba.org>
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> Hi,
>
> >>>>> On Mon, 23 Jul 2001 01:40:40 +0100
> >>>>> Brian Somers <brian@Awfulhak.org> said:
>
> brian> It seems to me that realhostname_sa() already has to deal specially
> brian> with ipv4 mapped ipv6 addresses. Surely the correct answer is to
> brian> special-case such addresses in the getaddrinfo() hints (see the
> brian> attached patch - based on what's in -current at the moment).
>
> It seems working for IPv4 mapped IPv6 address to me. However, I still
> cannot understand why changing AF_UNSPEC to AF_INET6 solves your
> problem. If AF_INET6 returns FQDN, I think AF_UNSPEC also returns
> FQDN.
Using AF_UNSPEC doesn't seem to return any AAAA records at all.
> brian> The only alternative that I can think of is to have getaddrinfo()
> brian> with a hint of AF_UNSPEC end up finding all A and AAAA records. If
> brian> it returns only one type of address, then it can't satisfy both the
> brian> ipv4 mapped address case *and* the normal ipv6 case (as per my
> brian> fec0::* addresses that I mentioned before).
>
> It is actually expected behavior of getaddrinfo(). It seems working
> so for global, and I could not find special case for site-local in
> getaddrinfo().
>
> In anyway, existing realhostname_sa() is too complex around handling
> IPv4 mapped IPv6 address. I propose to simplify it. Here is a patch
> from -current.
>
> Index: lib/libutil/realhostname.c
[patch elided]
Yes, this certainly works ok here. I'm happy if you want to commit
this :)
Thank you.
> --
> Hajimu UMEMOTO @ Internet Mutual Aid Society Yokohama, Japan
> ume@mahoroba.org ume@bisd.hitachi.co.jp ume@{,jp.}FreeBSD.org
> http://www.imasy.org/~ume/
--
Brian <brian@freebsd-services.com> <brian@Awfulhak.org>
http://www.freebsd-services.com/ <brian@[uk.]FreeBSD.org>
Don't _EVER_ lose your sense of humour ! <brian@[uk.]OpenBSD.org>
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