The ACK must carry the same credentials as that of INVITE just to reduce more message transactions related to Authentication because we can expect similar authentication mechanism for ACK as that of INVITE. If not server/proxy might pose the same authentication challenge as that of INVITE.
Thanks & Regards, Nataraju A.B. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of arunvenk Sent: Friday, February 27, 2004 9:46 AM To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED]; 'Roman Shpount'; [EMAIL PROTECTED]; 'Roman Shpount'; [EMAIL PROTECTED] Subject: RE: [Sip-implementors] Credentials in ACK I replied hastily. ACK must indeed have the same credentials as INVITE. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Thursday, February 26, 2004 9:35 PM To: arunvenk Cc: [EMAIL PROTECTED]; 'Roman Shpount'; [EMAIL PROTECTED] Subject: RE: [Sip-implementors] Credentials in ACK But what you say goes against the RFC section that i quoted in my mail. The call flows RFC (RFC 3665) also has an example (3.3) where it shows the ACK to duplicate the headers from the INVITE... "arunvenk" <[EMAIL PROTECTED] om> To <[EMAIL PROTECTED]>, "'Roman 02/27/04 06:53 AM Shpount'" <[EMAIL PROTECTED]> cc <[EMAIL PROTECTED] ia.edu>, <[EMAIL PROTECTED]> Subject RE: [Sip-implementors] Credentials in ACK The credentials for ACK will be different from that for the INVITE. This is because the nc value will be incremented and the method name is different. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Wednesday, February 25, 2004 10:36 PM To: Roman Shpount Cc: [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: Re: [Sip-implementors] Credentials in ACK Hi Roman, It should be exactly the same as the original INVITE - it need not be recomputed using the ACK method. Ref Section 22.1 of the RFC: "UACs creating an ACK message will duplicate all of the Authorization and Proxy-Authorization header field values that appeared in the INVITE to which the ACK corresponds." Subhash. Hughes Software Systems http://www.hssworld.com Roman Shpount <[EMAIL PROTECTED]> Sent by: To sip-implementors- <[EMAIL PROTECTED]> [EMAIL PROTECTED] cc ia.edu Subject [Sip-implementors] Credentials in 02/26/04 07:50 AM ACK RFC 3261 specifies that the ACK message must contain the same credentials as the INVITE. In case of digest authentication, should those credentials be exactly the same as the ones in the original INVITE, or should they be re-generated for ACK method? ___________________________________ Roman Shpount, VP of Technology aTelo, Inc. -- www.atelo.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 _______________________________________________ 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 Confidentiality Notice The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain confidential or privileged information. If you are not the intended recipient, please notify the sender at Wipro or [EMAIL PROTECTED] immediately and destroy all copies of this message and any attachments. _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
