RE: Thinking differently about the site local problem (was: RE: site local addresses (was Re: Fw: Welcome to the InterNAT...))

["Jeroen Massar" <[e-mail]>]

Keith Moore wrote:

> > > Well, that is emphatically *NOT* what application developers 
> > > do. They do not just observe that it does not work, they try
> > > to work around, e.g. routing messages to a different address,
> > > at a different time, through a third party, or through a
> > > different protocol. 
> > 
> > Indeed, correctly coded applications will use a getaddrinfo()
> > and then a connect() in a loop until succesful. 
> 
> it's perfectly reasonable to connect to an address without first
> doing a DNS lookup.

I think nobody can't help you if you are using hardcoded IP's.
The only case you have an IP without DNS is when you get it
passed from another layer/entity (eg in a FTP from the server).
In any other way if you have multiple targets you can also
try all of those in a loop similar to getaddrinfo().

> even when you need to do a DNS lookup,
> getaddrinfo() doesn't always do what you need.

Can you identify those so that getaddrinfo() can be expanded
to fix these cases?

Greets,
 Jeroen