[SIPForum-discussion] Expire Header

[Sandeep Mohapatra]

Hello All,
 
Here is a snippet from RFC 3261. The value mentioned in Green. 
 
expires: The "expires" parameter indicates how long the UA would
           like the binding to be valid.  The value is a number
           indicating seconds.  If this parameter is not provided, the
           value of the Expires header field is used instead.
           Implementations MAY treat values larger than 2**32-1
           (4294967295 seconds or 136 years) as equivalent to 2**32-1.
           Malformed values SHOULD be treated as equivalent to 3600.

Hence from the above snippet the value of Expires header should be 3600 seconds ie. 1 hour by default.
 
Regards,
Sandeep
Aricent

--- On Wed, 24/9/08, Rastogi, Vipul (Vipul) <vrastogi at avaya.com> wrote:

From: Rastogi, Vipul (Vipul) <vrastogi at avaya.com>
Subject: Re: [SIPForum-discussion] Expire Header
To: "DO THAI DANG" <dangdtvn at gmail.com>, "Keyur Amin" <fossil0681 at yahoo.com>
Cc: discussion at sipforum.org
Date: Wednesday, 24 September, 2008, 10:35 AM



>>>>> when the INVITE don't contain Expires header so 1 hour is the default time that UAC would fire off UAS.
 
There is not default value to Expires, if this header is not present in INVITE msg. Default vaule is only valid in REGISTER.
 
Vipul Rastogi





From: discussion-bounces at sipforum.org [mailto:discussion-bounces at sipforum.org] On Behalf Of DO THAI DANG
Sent: Tuesday, September 23, 2008 9:22 AM
To: Keyur Amin
Cc: discussion at sipforum.org
Subject: Re: [SIPForum-discussion] Expire Header



Dear every poeple ! 


Follow my opinion,Some request message like REGISTER which its Expires header field is not mandatory.
when the INVITE don't contain Expires header so 1 hour is the default time that UAC would fire off UAS.


you can check this information in RFC 3261. 


thanks & regard.





On Tue, Sep 23, 2008 at 5:23 AM, Keyur Amin <fossil0681 at yahoo.com> wrote:





Hello All,
 
Currently, the expected behavior for an INVITE with Expires header is:
 
      If the request is an INVITE that contains an Expires header
         field, the UAS core sets a timer for the number of seconds
         indicated in the header field value.  When the timer fires, the
         invitation is considered to be expired.  If the invitation
         expires before the UAS has generated a final response, a 487
         (Request Terminated) response SHOULD be generated.

What is an INVITE doesnt containt Expires header? Is there a default timer that would fire off UAS?

 

Thanks,
Keyur Amin
 
 
 
 
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