Thanks Tarun. It sounds from this as if sending 100 provisional responses is okay for non-INVITE transactions, just not any other kind of provisional response. Is this a reasonable supposition?
Tarun2 Gupta wrote: > Hi Alex > > I suggest you refer the following RFCs > > 1. RFC 4320 : Actions Addressing Identified Issues with the Session > Initiation Protocol's (SIP) Non-INVITE Transaction > 2. RFC 4321 : Problems Identified Associated with the Session Initiation > Protocol's (SIP) Non-INVITE Transaction > > Regards, > Tarun > > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Alex Balashov > Sent: Thursday, October 16, 2008 10:43 AM > To: SIPImplementors Mailing list > Subject: [Sip-implementors] Provisional responses for non-INVITE requests. > > The hallowed RFC says: > > > -- > > 8.2.6.1 Sending a Provisional Response > > One largely non-method-specific guideline for the generation of > responses is that UASs SHOULD NOT issue a provisional response for a > non-INVITE request. Rather, UASs SHOULD generate a final response to > a non-INVITE request as soon as possible. > > -- > > Is this something that is actually followed in practise? > > What if I have a registrar that must do a lengthy database dip across a > WAN link to find user-specific authentication information for a REGISTER > request? My tendency has been to issue a 100 Trying for the REGISTER in > order to prevent UAC retransmissions of the request, because processing > the request can sometimes take as long as 2-3 seconds. > > Is this something I should not do in case other SIP stacks do not quite > understand the relevance of a provisional response to a REGISTER > transaction per the above recommendation? > > Thanks, > > -- Alex > > > -- > Alex Balashov > Evariste Systems > Web : http://www.evaristesys.com/ > Tel : (+1) (678) 954-0670 > Direct : (+1) (678) 954-0671 > Mobile : (+1) (706) 338-8599 > _______________________________________________ > Sip-implementors mailing list > [email protected] > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > > "DISCLAIMER: This message is proprietary to Aricent and is intended solely > for the use of the individual to whom it is addressed. It may contain > privileged or confidential information and should not be circulated or used > for any purpose other than for what it is intended. If you have received this > message in error,please notify the originator immediately. If you are not the > intended recipient, you are notified that you are strictly prohibited from > using, copying, altering, or disclosing the contents of this message. Aricent > accepts no responsibility for loss or damage arising from the use of the > information transmitted by this email including damage from virus." -- Alex Balashov Evariste Systems Web : http://www.evaristesys.com/ Tel : (+1) (678) 954-0670 Direct : (+1) (678) 954-0671 Mobile : (+1) (706) 338-8599 _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
