Hi Paul,
I assume that it is legit for Proxy or UAS to add R-R of other nodes in Response based on your comments. Thank you so much. Frank On Wed, Jul 25, 2012 at 10:07 AM, Paul Kyzivat <[email protected]>wrote: > On 7/25/12 10:50 AM, fuliang yuan wrote: > > Hi All, > > > > Record route is normally added in Request. > > I have encountered a weird case that INVITE from my sip device did not > have > > Record-Route, but the response of 180 and 200 have Record-Route. I could > > not find if it is legit to add Record-Route in response from RFC 3261. > > You don't say if there are intermediate nodes (proxy or b2bua) between > the UAC and UAS. > > It would be normal for the UAC to *not* include a Record-Route. Rather, > its proxies (or perhaps other intermediaries) that want to stay on the > signaling path that will insert Record-Route. Then the UAS will echo > what it receives in the response. So from the perspective of the UAC, it > will look as you describe. > > Based on a quick look, and memory, I don't think 3261 says anything, pro > or con, about the UAS adding values to the R-R. IMO there is no reason > why it couldn't if it has a reason to. (A proxy is permitted to insert a > R-R value with a URI identifying some node other than itself. If that is > ok then it makes sense to permit the UAS to do so also.) If necessary, > the UAS can consider itself as a stateless proxy that adds to R-R and > then forwards the request on to itself. > > Thanks, > Paul > > > INVITE without Record-Route ------------------> > > <----------------- 183 > with > > Record-Route > > <----------------- 200 > with > > Record-Route > > > > Please let me know if it is legit to add Record-Route in response? > > > > Thanks in advance, > > > > > > Frank > > _______________________________________________ > > 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
