Hi
I think that RFC 3261 provides the answer in different places:
1)
SIP Transaction: A SIP transaction occurs between a client and a
server and comprises all messages from the first request sent
from the client to the server up to a final (non-1xx) response
2)
13.2.2 Processing INVITE Responses
Once the INVITE has been passed to the INVITE client transaction, the
UAC waits for responses for the INVITE.
However, a UA MAY initiate a regular transaction while an INVITE
transaction is in progress. A UA MAY also initiate an INVITE
transaction while a regular transaction is in progress.
20.16 CSeq
A CSeq header field in a request contains a single decimal sequence
number and the request method. The sequence number MUST be
expressible as a 32-bit unsigned integer. The method part of CSeq is
case-sensitive. The CSeq header field serves to order transactions
within a dialog, to provide a means to uniquely identify
transactions, and to differentiate between new requests and request
retransmissions.
And in conclusion in RFC:
28.1 Major Functional Changes
RFC 2543 was silent on whether a UA could initiate a new
transaction to a peer while another was in progress. That is now
specified here. It is allowed for non-INVITE requests, disallowed
for INVITE.
If I well understand, it is allowed for no INVITE transaction and it is the role of UA
transaction user to reorder the transaction thanks Cseq.
It would be nice if other people can confirm that.
Best regards
Jean-Pierre
-----Original Message-----
From: Ar c'hasour [mailto:[EMAIL PROTECTED]
Sent: mardi 16 d�cembre 2003 14:48
To: [EMAIL PROTECTED]
Subject: [Sip-implementors] 2 requests at the same time?
Hi,
I have a basic question about SIP, which I can not
find the answer in 3261, nor 3265.
Once a dialog is established, can a UA send 2 SIP
requests at the same time (eg: 2 NOTIFY) in this
dialog, or must he send the 1st SIP request, wait for
the response for the 1st request, and only then send
the 2nd SIP request?
Thanks
Patrig
__________________________________
Do you Yahoo!?
New Yahoo! Photos - easier uploading and sharing.
http://photos.yahoo.com/
_______________________________________________
Sip-implementors mailing list
[EMAIL PROTECTED]
http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
_______________________________________________
Sip-implementors mailing list
[EMAIL PROTECTED]
http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
