Keith Moore wrote: > or to state this better, it's fine if apps simply avoid > passing some kinds of addresses around as long as they can > easily tell which ones to pass around and which ones to not > pass around.
Yet you want to ban apps from recognizing the defined flags FE80, FEC0, FC00, ... I am having a hard time following your logic. > it's not fine if there's not an > easily-identifiable, portable address available for every > host that is expected to work with an app. 2::/3 ??? Or are you talking about portable as in PI? > > > * Applications should not assume that addresses can be forwarded > > at-will, unless provided with additional (configured?) information > > that would support this assumption. > > applications should be able to forward addresses to other > hosts; this is an essential capability. that doesn't mean > that they can expect those addresses to be usable from remote > locations. but if they're not usable, the reason should be > either network failure or administrative prohibition - in > other words, something that the app should not be expected to > work around. So there should only be a single address per host, or all addresses must have exactly the same policy and reachability characteristics??? This is the limitation of the IPv4 world. There is nothing preventing an app from continuing down that path. Unfortunately there are some who want to preclude anyone else from taking a different path. > > > * Applications that do not care to do their own address management > > need a higher level abstraction to the current sockets and > getaddrinfo > > APIs. > > not sure what you mean by this. Not to put words in Andrew's mouth, but I suspect he meant 'if it is more complex than the app wants to deal with, let the stack take care of it'. Tony -------------------------------------------------------------------- IETF IPng Working Group Mailing List IPng Home Page: http://playground.sun.com/ipng FTP archive: ftp://playground.sun.com/pub/ipng Direct all administrative requests to [EMAIL PROTECTED] --------------------------------------------------------------------
