> However, if the PRACK makes it all the way to the UAS, > reliability has been achieved. Continued retransmission > of the provisional response by the UAS at that point > provides no benefit. It clearly indicates "I Still Want My Acknowledgment!". However I have no problem with UAS optionally stopping the retries (if PRACK passes authorization) and continue to time awaiting the new PRACK. > Otherwise, you just have the UAS yelling, "I Want My > Acknowledgment!" and the UAC yelling back "You Have > Your Acknowledgment!" over and over. The UAC does not yell back "You Have Your Acknowledgment!" upon receiving a 18x retry. Per rfc3262 section 4, the 18x must be discarded. If appropriate and able to yell back again upon receiving a PRACK failure response, UAC should do so regardless of the UAS retrying the 18x (i.e. indicating "I Still Want My Acknowledgment!"). _______________________________________________ Sipping mailing list https://www.ietf.org/mailman/listinfo/sipping This list is for NEW development of the application of SIP Use sip-implementors@xxxxxxxxxxxxxxx for questions on current sip Use sip@xxxxxxxx for new developments of core SIP
