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Re: [nfsv4] My probable non-participation in IETF114 meeting -- missing agenda items

Chuck Lever III <chuck.lever@oracle.com> Tue, 30 August 2022 19:31 UTC

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From: Chuck Lever III <chuck.lever@oracle.com>
To: David Noveck <davenoveck@gmail.com>
CC: "Black, David" <David.Black@dell.com>, Rick Macklem <rmacklem@uoguelph.ca>, NFSv4 <nfsv4@ietf.org>
Thread-Topic: [nfsv4] My probable non-participation in IETF114 meeting -- missing agenda items
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Subject: Re: [nfsv4] My probable non-participation in IETF114 meeting -- missing agenda items
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Relaying what I've learned from my Solaris colleagues:

> On Aug 17, 2022, at 7:24 AM, David Noveck <davenoveck@gmail.com> wrote:
> 
> In attempting to rewrite section 12 on an as-implemented basis, I find I need some information about how existing servers and clients deal with internationalized domain names.
> 
> With regard to servers, I need to know how they deal with domain strings beginning with "xn--":
>    - do they simply treat such strings as
>      presented, ignoring the Idna  
>      convention?
>    - do they translate the portion past "--"
>      from punycode to Unicode?
>    - do they follow the recommended
>      approach in rfc7530 (unlikely but
>      possible)

Code audit shows both the Solaris client and server treat the domain
as a UTF-8-encoded string.  They simply treat such strings as presented,
ignoring the IDNA convention".

Some tests are planned to confirm the findings of this audit.


> Also need to know what checks are done for label   validity. In particular, how/if checks for valid UTF-8 are done.

No code found to verify UTF-8 validity for the domain label.


--
Chuck Lever

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