[SIPForum-discussion] Putting Record route in the responses

[Steve Parrish]

I forget where it is the spec but here are a few comments.
 
 
The Record-Route semantics aren't valid until the dialog is "confirmed"
(active).  Meaning, if the INVITE contains the Record-Route header field
and the dialog is successfully established (via a 2xx response), then
the Record-Route header field values will be used.  
 
Since in your example you return a 4xx-5xx response to the INVITE, the
semantics of the Record-Route header fields is irrelevant (No SIP device
along the path will use them), I don't think it makes any difference
whether or not you include them in the response. 
 
-Steve Parrish
 
 
-----Original Message-----
From: discussion-bounces at sipforum.org
[mailto:discussion-bounces at sipforum.org] On Behalf Of Manpreet Singh
Sent: Wednesday, September 06, 2006 7:04 PM
To: discussion at sipforum.org; sip-implementors at cs.columbia.edu
Subject: [SIPForum-discussion] Putting Record route in the responses
Importance: High
 
Could someone point me to the part of the spec which talks about what
all headers are to be inserted in all the response to an INVITE or any
other request. I am bit lost trying to find the right explanation.
 
I am specifically looking for a case where a proxy inserts a
Record-Route header in the outgoing invite and the UAS rejects the
INVITE with some 5xx or a 4xx response. Now would the 4xx or 5xx
response carry the R-R headers from UAS to the proxy and then back to
UAC? I have generally seen the implementations where 100 doesnt carry
and 18x carries it. 
 
thanks
 
Manpreet 
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