INFO was written before there _WAS_ anything but an INVITE dialog
usage (called a call-leg at the time), so any
discussion of its use in other contexts (like SUBSCRIBE) will
necessarily be in another document.
I remember a strong consensus around it only being allowed in the
context of an INVITE usage, but can't find
definitive text in any later document this morning. Can anyone else?
On May 31, 2007, at 10:20 AM, Paul Kyzivat wrote:
My understanding is consistent with what dialogusage says - INFO is
specific to the INVITE dialog usage. But off the top of my head I
can't recall where that is specified.
Paul
Nina Garaca wrote:
Hi all,
I have read rfc2976 - The SIP INFO Method, but I haven't really
understood that INFO message belongs only to INVITE dialog usage,
which however draft-ietf-sipping-dialogusage-04 claims in its part
5.3:
5.3. Matching requests to usages
For many mid-dialog requests, identifying the usage they belong
to is
obvious. A dialog can have at most one invite usage, so any
INVITE,
UPDATE, PRACK, ACK, CANCEL, BYE, or INFO requests belong to it.
So my, question is:
Can INFO message belong to other usages, besides INVITE, such
are SUBSCRIBE or REFER?
Thanks in advance,
Nina.
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