Subject: Re: [Sip] To-tag in REGISTER

From: Jonathan Rosenberg <[email-masked]>
Date: Tue, 18 Jun 2002 15:06:32 -0400

The To tag shouldn't be there, since REGISTER doesn't establish a 
dialog. Since the spec doesn't specify handling for each and every one 
of the million error cases, behavior in this case is not defined, and 
left implementation dependent. Generally, you should be gracious with 
what you receive, so I would recommend ignoring the tag.

Thanks,
Jonathan R.

Itamar Gilad wrote:
> This is question we ran into in the last SIPit. How should an incoming
> REGISTER request be handled if it has a To tag:
> 
> 1. Reject the request with a 4xx response code (Invalid Registration)
> or 
> 2. Accept the request but ignore the To tag at the address-of-record
> stored
> at the location DB (the record is stored without the tag).
> 
> Thanks in advance
> 
>   Itamar Gilad
>   RADVISION
> 
> 
> 
> _______________________________________________
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-- 
Jonathan D. Rosenberg, Ph.D.            72 Eagle Rock Avenue
Chief Scientist                         First Floor
dynamicsoft                             East Hanover, NJ 07936
[email-masked]                 FAX: (973) 952-5050
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http://www.dynamicsoft.com

_______________________________________________
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This list is for NEW development of the core SIP Protocol
Use [email-masked] for questions on current sip
Use [email-masked] for new developments on the application of sip