Actually you missed the word "address-of-record". Its talking about that.
section 10.2 says "From: The From header field contains the address-of-record of the person responsible for the registration. The value is the same as the To header field unless the request is a third-party registration." You can look up the address-of-record definition in section 6. You will find that its a SIP(S) URI. Regards, Hisham Khartabil > -----Original Message----- > From: ext Aymeric MOIZARD [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, February 26, 2002 11:47 AM > To: [EMAIL PROTECTED] > Subject: [Sip-implementors] tag in REGISTER? > > > Hi > > This are taken out of bis-08: > > "8.1.1.3 From" which is valid for REGISTER says: > > "The From field MUST contain a new "tag" parameter, chosen by the > UAC. > See Section 19.3 for details on choosing a tag." > > Section "10.2 Constructing the REGISTER Request" says > > "From: The value is he same as the To header field unless the > request is a third-party registration." > > Note that this sentence means that we "copy" the To header and > the To header does not contains TAG! > > Section 10.2 say nothing about tags and the draft > draft-ietf-sip-call-flows-05.txt shows REGISTER request > without any tag in the to and from fields. > > Also, I'm testing a SIP phone that includes 2 differents tags > in the "From" and "To" headers? > > 1 solution: > rfc2543-08 does not mandate tag in The To header. (in request like > register) > rfc2543-08 mandate to copy the to header in the from field for > registration. > (so the to header does not include tag???) > > This is not compliant with section 8.1.1.3 > > 2 solution: > rfc2543-08 does not mandate tag in The To header > rfc2543-08 mandate to copy the to header in the from field for > registration. > rfc2543-08 mandate tag in The From header so we add a tag. > > In fact, the sentence in section "10.2 Constructing the REGISTER > Request" > saying that the from is a copy of the to is not true any > more because > a tag has been added! > > 3 solution: (choosen by the SIP phone I'm testing.) > The To and From feild contains 2 different tag in the from and to. > > Again, From is not a copy of To... and the To contains a tag which > appears to be strange?? > > 4 solution: (I don't think it's valid, but it's better than solution 3 > :) > The To and From contains the same tag. From is a copy of the To. > > Issue: the To contains a tag which appears to be strange?? > > > What's the solution choosed for rfc2543-08? > I'm sure solution 1 is valid because of rfc2543 backward > compatibility. > What about the two other solutions. > > Also, should we add a tag in the final response if the To header > does not contains one? > > Thanks > Aymeric > _______________________________________________ > 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