On Tue, 2010-02-09 at 09:24 +0100, Olle E. Johansson wrote: > Isn't there an important difference to be noted here. In one call > setup, you can have multiple 407 challenges, but only one 401. > If you're using an outbound proxy, that proxy can challenge you, as > well as the home proxy and the UA on the receiving end.
Assuming that one does not use "Request-Disposition: no-cancel" and there are no race conditions, the UAC can receive only one 4xx for each INVITE it sends out. Successive re-sends of the INVITE may receive multiple 407 responses, as different proxies may demand credentials for different realms. (Although it's unlikely in practice that the UAC will need credentials for more than one realm.) Similarly, successive re-sends of the INVITE could receive multiple 401 responses, if the INVITEs go to different destinations that demand credentials for different realms. Dale _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
