Re: identity persistence and comparison issues

[Joe Touch <touch@ISI.EDU>]

Brian E Carpenter wrote:

> Iljitsch van Beijnum wrote:
...
> > In other words, the bind(2) call can trigger the creation of a 
> > longer-lived identifier. Still, I'm not sure how applications 
> > determine which address to use in referrals, it may be necessary to 
> > make this an explicit API call = application changes = a bad thing.
>
>
> That's an interesting point. In a 2-way conversation, a 'close' on a socket
> is a strong signal that the stack can forget any state (unless there is
> some optimization possible by caching the state)....

'close' is an app-side input to the stack; there are other 
considerations about when to drop state.

E.g., TCP has to keep TIME_WAIT to avoid reusing ports/seq numbers. At 
which point addresses from elsewhere cannot be moved 'here' until these 
timers expire.

Joe

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