Tony Finch wrote:
On Thu, 13 Sep 2007, David Conrad wrote:
How do you renumber the IP address stored in the struct sockaddr_in in a
long running critical application?
Applications that don't respect DNS TTLs are broken for many reasons, not
just network renumbering.
Since neither TCP nor UDP respect DNS TTLs it seems a bit of a stretch
to expect apps to do so.
And for that matter, a DNS name is not a host name, and hasn't reliably
been a host name since at least the mid 1980s. Just because you get
address A1 from doing a lookup on a name at time T1 and an address A1
from doing the same lookup at time T2, doesn't mean that those addresses
will connect to the same (layer 3 or higher) stack.
So even if we somehow magically changed our existing transport protocols
to be able to support changes to endpoint addresses on the fly, DNS
names as they are currently used are not suitable as endpoint
identifiers for such a purpose. At best, existing DNS names serve as
identifiers for the initial contact only.
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