Re: [nat66] New NAT66 Draft - support for SRV+DNS Dyn Updates

Sun, 15 Mar 2009 00:41:36 -0700

Keith Moore  -  le (m/j/a) 3/14/09 4:28 PM:
Is it not true that those that use URLs and "connect by name" don't need
to know whether a remote-endpoint address + port is obtained from an A,
an AAAA, or an SRV record?
    

each application is defined to work in a
certain way, and most are not defined to use SRV records.
My understanding so far is that if an application uses gethostbyname(), and if its resolver, seeing that the URL is for a SRV RR (e.g. _HTTP._TCP.MyWebServer/HomePage), asks for an SRV RR, then the application, having submitted the URL transparently, doesn't know whether the address and port it gets have been obtained directly in an A or AAAAA, or after an intermediate SRV.

If this is wrong (it may be), can you please explain the reason?

 furthermore
the SRV RFC explicitly forbids using SRV records for apps that aren't
defined to use them.
I didn't see it in RFC 2052.
Could you indicate where in this RFC, or in which other RFC, this is?

Regards,

RD




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