On 2014-09-23 10:11, Sanford Whiteman wrote:
>> if somehost.example.com has the MX, it should return true with
>> checkdnsrr('somehost.example.com'). If example has the MX set to
>> somehost.example.com or similar, it should return true as well. Or am
>> I missing your point?
>
> You are missing it, as there are no MX records involved. I'm
> demonstrating that the function gives incorrect results in the absence
> of an MX record because there is a bug in CNAME handling (or a bug in
> A handling, if you prefer).
>
> somehost.example.com has no MX RR. It has a CNAME (per DNS rules, the
> CNAME must thus be the only record for somehost.example.com). The
> CNAME points to example.com.
>
> example.com has no MX RR. It has an A pointing to 1.2.3.4.
>
> checkdnsrr('somehost.example.com') should return false. It returns true.
> checkdnsrr('example.com') should return false. It returns false.
>
> You could try to revise the docs and say, "Oh, it doesn't really mean
> an MX lookup, it means an explicit MX *or* implicit MX, like how a
> basic smtp-sender works. So that's why the CNAME --> A one returns
> true." Except then 'example.com' should return true as well. It does
> not: it returns false. Changing the docs does not fix the bug.
Ah okay, I think you're right. It shouldn't accept the CNAME.
--
Regards,
Mike
--
PHP Internals - PHP Runtime Development Mailing List
To unsubscribe, visit: http://www.php.net/unsub.php
