Hi,
The subsequent request is always sent by the UAC and it has the same
call-id
with the incremented CSeq number.The UAC doesn't copy the To Tag in the
subsequent request for 401/407 responses.
Quoted from the bis-05, line 1013.
"In all of the above cases, retrying the request is accomplished by
creating a new request with the appro-
priate modifications. This new request SHOULD have the same value of the
Call-ID, To,and From of the
previous request, but the CSeq should contain a new sequence number that is
one higher than the previous."
Rgds
Seshu
Barry Desborough <[EMAIL PROTECTED]> on 12/18/2001 05:46:27 PM
To: "[EMAIL PROTECTED] (E-mail)"
<[EMAIL PROTECTED]>
cc: (bcc: Seshashayi T/HSSBLR)
Subject: [Sip-implementors] Response to 401/407
If I issue a REGISTER request which gets a 401 or 407 response, how should
my new request (with credentials) be formed?
Can I use a new Call-ID in the new request? If so, is it necessary to
increment the CSeq from the original request, as stated in 20.2.2 of
bis-05?
I think not, as the new Call-ID implies a new dialog.
If I must use the Call-ID from the original request, and the 401/407
response carried a To: tag, should I include this tag in my new request? It
seems to me that I should, as retaining the original Call-ID and
incrementing the CSeq implies that the original dialog is still in
existence. I have an interworking problem if I do carry the To: tag, and I
have a philosophical problem if I don't!
Barry Desborough
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