Oh sorry.
It IS invalid to send a response to a response.


>> -----Original Message-----
>> From: Sweeney, Andrew (Andrew) [mailto:[EMAIL PROTECTED]
>> Sent: 08 February 2006 13:16
>> To: Attila Sipos; Sweeney, Andrew (Andrew);
>> [email protected]
>> Subject: RE: [Sip-implementors] How to handle a 18x response with a
>> missingheader
>> 
>> 
>> Thanks, But I thought it was invalid to send a response to a 
>> response. I will go back through the RFC and check again. I 
>> guess I could always send a 487 as well.
>> 
>> 
>> -----Original Message-----
>> From: Attila Sipos [mailto:[EMAIL PROTECTED]
>> Sent: Wednesday, February 08, 2006 4:10 AM
>> To: Sweeney, Andrew (Andrew); [email protected]
>> Subject: RE: [Sip-implementors] How to handle a 18x response with a
>> missingheader
>> 
>> 
>> 
>> This is difficult.  No doubt you are asking this
>> beacuse there is no explicit statement (as far as I
>> can see) regarding your scenario in RFC3261.
>> 
>> The RFC does however state that "The Content-Type header
>> field MUST be present if the body is not empty.".
>> 
>> I guess there are a variety of approaches:
>> 1. reject it with 400 Bad Request
>> 2. reject it with 415 Unsupported Media Type
>>    and say what you can accept with an Accept header
>>    (like what it says in 8.2.3 Content Processing)
>> 3. assume that it's "application/sdp" and try
>>    to parse it as such.  If you fail to parse it,
>>    return with 415 Unsupported Media Type.
>> 
>> Maybe the 2nd is the most technically correct since
>> it will at least tell the other people that you don't
>> understand the one of the Content headers.
>> 
>> The 3rd option would probably give the most interop
>> but this is somewhat encouraging others to be a bit sloppy.
>> 
>> With things like this, it's simply best to tell the
>> makers of the offending UA that they're not compliant
>> with one of the basic mandatory requirements of RFC3261.
>> 
>> Regards,
>> Attila
>> 
>> 
>> 
>> >> -----Original Message-----
>> >> From: [EMAIL PROTECTED]
>> >> [mailto:[EMAIL PROTECTED] Behalf 
>> >> Of Sweeney,
>> >> Andrew (Andrew)
>> >> Sent: 07 February 2006 22:05
>> >> To: '[email protected]'
>> >> Subject: [Sip-implementors] How to handle a 18x response with a
>> >> missingheader
>> >> 
>> >> 
>> >> 
>> >> 
>> >>   I have received a 183 message with a content length but 
>> >> no content type. What is the correct procedure for rejecting 
>> >> this message or dropping
>> >> the entire dialog?
>> >> 
>> >> Thanks
>> >> _______________________________________________
>> >> Sip-implementors mailing list
>> >> [email protected]
>> >> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
>> >> 
>> 

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