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Re: [Sip] international chars in hostname part of SIP URL

"Henning G. Schulzrinne" <hgs@cs.columbia.edu> Fri, 07 September 2001 18:47 UTC

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Date: Fri, 07 Sep 2001 14:29:36 -0400
From: "Henning G. Schulzrinne" <hgs@cs.columbia.edu>
Organization: Dept. of Computer Science, Columbia University
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To: Ajay Chitturi <ajaych@windows.microsoft.com>
CC: sip@ietf.org
Subject: Re: [Sip] international chars in hostname part of SIP URL
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Ajay Chitturi wrote:
> 
> Hi,
> 
> The SIP URL syntax allows only alphanum and '-' for the hostname part of the SIP URL.
> Is it by design to prevent the use of other characters in the domain name ?
> 

The current DNS and (standard-compliant) registrars only allow ASCII.
See RFC 1035 and the IDNS effort. Once this is resolved, it is likely
that domain names will be UTF-8 "externally" (they may be some strange
transformation deeper down), so implementations are well advised not to
be too picky about the characters in that URL.

See, for example, http://www.register.com/domain-rules.cgi
-- 
Henning Schulzrinne   http://www.cs.columbia.edu/~hgs

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