If the receiver is a UA not a proxy, the request with max-forwards=0 will be accepted.
YoungSun > -----Original Message----- > From: Kasturi Narayanan [mailto:[EMAIL PROTECTED] > Sent: Monday, November 13, 2006 11:43 AM > To: sip-implementors; Song, Youngsun > Subject: RE: [Sip-implementors] FW: Query on max-forwards counts > > The approach suggested by Robert Sparks solves the problem > but creates an un-necessary hop when the sender knows for > sure that it going to be dropped by the Receiver (since it is > sending with mf=0). > > Kasturi > > -----Original Message----- > From: Song, Youngsun [mailto:[EMAIL PROTECTED] > Sent: Monday, November 13, 2006 9:22 AM > To: [email protected] > Subject: [Sip-implementors] FW: Query on max-forwards counts > > Hi, > > Please see the attached response from Robert Sparks regarding > this query. (FYI, I had also sent him a separate email...) > Per his response, Proxy-B should forward the request to UA-B. > > Thanks to all who has taken the time to respond to my query, YoungSun > > > > -----Original Message----- > > From: Robert Sparks [mailto:[EMAIL PROTECTED] > > Sent: Monday, November 13, 2006 9:12 AM > > To: Song, Youngsun > > Subject: Re: [Sip-implementors] Query on max-forwards counts > > > > See page 95, item 3. > > > > You reject when you receive, not before you send. > > You reject when you receive a max-forwards of 0, not when > you receive > > a max-forwards of 1. > > > > RjS > > > > > >> -----Original Message----- > > >> From: [EMAIL PROTECTED] > > >> [mailto:[EMAIL PROTECTED] On > > Behalf Of Song, > > >> Youngsun > > >> Sent: Friday, November 10, 2006 11:19 AM > > >> To: [email protected] > > >> Subject: [Sip-implementors] Query on max-forwards counts > > >> > > >> Hi, > > >> > > >> I have a clarification question on the following statement > > in Section > > >> 8.1.1.6 of RFC3261 regarding when a proxy should send a 483 and > > >> whether the number of hops includes the destination hop. > > >> > > >> "The Max-Forwards header field serves to limit the number > > of hops a > > >> request can transit on the way to its destination. It > > consists of an > > >> integer that is decremented by one at each hop. If the > > Max-Forwards > > >> value reaches 0 before the request reaches its > > destination, it will > > >> be rejected with a 483(Too Many Hops) error response." > > >> > > >> > > >> Consider the following flow: (mf=max-forwards) > > >> > > >> > > >> UA-A --- INVITE (mf=2) ---> Proxy-A ---- INVITE (mf=1) > > ---> Proxy-B > > >> ---- INVITE (mf=0) ---> UA-B > > >> > > >> > > >> In the flow above, should Proxy-B forward the INVITE with > > >> max-forwards=0 to UA-B or should it reject the request with 483? > > >> > > >> Thanks for your help in advance, > > >> YoungSun > > >> > > >> _______________________________________________ > > >> Sip-implementors mailing list > > >> [email protected] > > >> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > > >> > > > > > > _______________________________________________ > Sip-implementors mailing list > [email protected] > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > > _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
