Re: ai_flags in calls to getaddrinfo, broader call for reproducibility check

[Robert Pluim]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Robert Pluim <rpluim@gmail.com>
>> Cc: rtt@dasyatidae.com,  emacs-devel@gnu.org
>> Date: Tue, 12 Jan 2021 17:00:56 +0100
>> 
>> >   (dns-query "google.com" 'AAAA)
>> >     => "2a00:1450:4009:80b:0:0:0:200e"
>> >
>> > So I'm not sure that test is reliable enough for these purposes.
>> 
>> Itʼs checking if IPv6 names can be resolved, not if IPv6 works. If you
>> think thatʼs not a useful test, we can remove it.
>
> No, feel free to ignore me.  I was just surprised it worked, that's
> all.
>
>> I can condition all the IPv6 tests on the following, which should
>> alleviate your concerns:
>> 
>> ;; This will need updating when IANA assign more IPv6 global ranges.
>> (defun ipv6-is-available ()
>>   (and (featurep 'make-network-process '(:family ipv6))
>>        (cl-rassoc-if
>>         (lambda (elt)
>>           (and (eq 9 (length elt))
>>                (= (logand (aref elt 0) #xe000) #x2000)))
>>         (network-interface-list))))
>
> Thanks, that would be good, I think.

Done as 0f6c083251

Robert