From: David Howells <dhowells-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: Jim Rees <rees-63aXycvo3TyHXe+LvDLADg@public.gmane.org>
Cc: dhowells-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
jmorris-gx6/JNMH7DfYtjvyW6yDsg@public.gmane.org,
keyrings-6DNke4IJHB0gsBAKwltoeQ@public.gmane.org,
linux-nfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-security-module-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-cifs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
libc-alpha-9JcytcrH/bA+uJoB2kUjGw@public.gmane.org
Subject: Re: [PATCH 2/2] Define ENONAMESERVICE and ENAMEUNKNOWN to indicate name service errors
Date: Thu, 09 Feb 2012 10:04:49 +0000 [thread overview]
Message-ID: <17614.1328781889@redhat.com> (raw)
In-Reply-To: <20120208141552.GA3273-63aXycvo3TyHXe+LvDLADg@public.gmane.org>
Jim Rees <rees-63aXycvo3TyHXe+LvDLADg@public.gmane.org> wrote:
> Define ENAMEUNKNOWN to indicate "Network name unknown". This can be used to
> indicate, for example, that an attempt was made by dns_query() to make a query,
> but the name server (e.g. a DNS server) replied indicating that it had no
> matching records.
>
> Would this be the same as NXDOMAIN? That is, does it mean the name server
> couldn't find a record, or does it mean that the record doesn't exist?
Is there a way to tell the difference? Can you store a negative record in the
DNS? Or is it that the DNS has records for the name, just not records of the
type you're looking for (eg. NO_ADDRESS/NO_DATA from gethostbyname())?
David
WARNING: multiple messages have this Message-ID (diff)
From: David Howells <dhowells@redhat.com>
To: Jim Rees <rees@umich.edu>
Cc: dhowells@redhat.com, jmorris@namei.org, keyrings@linux-nfs.org,
linux-nfs@vger.kernel.org, linux-security-module@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-cifs@vger.kernel.org,
linux-api@vger.kernel.org, libc-alpha@sourceware.org
Subject: Re: [PATCH 2/2] Define ENONAMESERVICE and ENAMEUNKNOWN to indicate name service errors
Date: Thu, 09 Feb 2012 10:04:49 +0000 [thread overview]
Message-ID: <17614.1328781889@redhat.com> (raw)
In-Reply-To: <20120208141552.GA3273@umich.edu>
Jim Rees <rees@umich.edu> wrote:
> Define ENAMEUNKNOWN to indicate "Network name unknown". This can be used to
> indicate, for example, that an attempt was made by dns_query() to make a query,
> but the name server (e.g. a DNS server) replied indicating that it had no
> matching records.
>
> Would this be the same as NXDOMAIN? That is, does it mean the name server
> couldn't find a record, or does it mean that the record doesn't exist?
Is there a way to tell the difference? Can you store a negative record in the
DNS? Or is it that the DNS has records for the name, just not records of the
type you're looking for (eg. NO_ADDRESS/NO_DATA from gethostbyname())?
David
next prev parent reply other threads:[~2012-02-09 10:04 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-08 12:29 [PATCH 1/2] Define ENOAUTHSERVICE to indicate "Authentication service unavailable" David Howells
2012-02-08 12:29 ` David Howells
[not found] ` <20120208122905.8902.65762.stgit-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2012-02-08 12:29 ` [PATCH 2/2] Define ENONAMESERVICE and ENAMEUNKNOWN to indicate name service errors David Howells
2012-02-08 12:29 ` David Howells
[not found] ` <20120208122917.8902.78395.stgit-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2012-02-08 14:15 ` Jim Rees
2012-02-08 14:15 ` Jim Rees
2012-02-08 16:50 ` Steve French
[not found] ` <20120208141552.GA3273-63aXycvo3TyHXe+LvDLADg@public.gmane.org>
2012-02-09 10:04 ` David Howells [this message]
2012-02-09 10:04 ` David Howells
[not found] ` <17614.1328781889-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-02-09 13:44 ` Jim Rees
2012-02-09 13:44 ` Jim Rees
[not found] ` <20120209134429.GC6663-63aXycvo3TyHXe+LvDLADg@public.gmane.org>
2012-02-10 20:02 ` David Howells
2012-02-10 20:02 ` David Howells
2012-02-08 23:53 ` [PATCH 1/2] Define ENOAUTHSERVICE to indicate "Authentication service unavailable" Valdis.Kletnieks-PjAqaU27lzQ
2012-02-08 23:53 ` Valdis.Kletnieks
2012-02-08 15:48 ` Joseph S. Myers
[not found] ` <22934.1328745230-+bZmOdGhbsPr6rcHtW+onFJE71vCis6O@public.gmane.org>
2012-02-09 10:01 ` David Howells
2012-02-09 10:01 ` David Howells
-- strict thread matches above, loose matches on Subject: below --
2012-06-01 3:32 Trond Myklebust
2012-06-01 3:32 ` [PATCH 2/2] Define ENONAMESERVICE and ENAMEUNKNOWN to indicate name service errors Trond Myklebust
2012-03-22 13:35 [PATCH 1/2] Define ENOAUTHSERVICE to indicate "Authentication service unavailable" David Howells
2012-03-22 13:35 ` [PATCH 2/2] Define ENONAMESERVICE and ENAMEUNKNOWN to indicate name service errors David Howells
2011-03-07 15:02 [PATCH 1/2] Define ENOAUTHSERVICE to indicate "Authentication service unavailable" David Howells
[not found] ` <20110307150208.28218.89348.stgit-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2011-03-07 15:02 ` [PATCH 2/2] Define ENONAMESERVICE and ENAMEUNKNOWN to indicate name service errors David Howells
2011-03-07 15:02 ` David Howells
[not found] ` <20110307150218.28218.84916.stgit-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2011-03-07 16:00 ` Alan Cox
2011-03-07 16:00 ` Alan Cox
2011-03-08 15:09 ` David Howells
2011-03-08 15:25 ` Alan Cox
2011-03-08 16:37 ` David Howells
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