Re: [RFC] automatically retrying network connections

[Andreas Schwab <schwab@suse.de>]

On Jul 23 2018, Jimmy Yuen Ho Wong <wyuenho@gmail.com> wrote:

> On Sun, Jul 22, 2018 at 12:43 PM, Lars Ingebrigtsen <larsi@gnus.org> wrote:
>> Robert Pluim <rpluim@gmail.com> writes:
>>
>>>     (dns-query NAME &optional TYPE FULLP REVERSEP)
>>>
>>>     Query a DNS server for NAME of TYPE.
>>>     If FULLP, return the entire record returned.
>>>     If REVERSEP, look up an IP address.
>>>
>>> which you could use instead of 'nslookup' or 'getaddrinfo' (although
>>> 'dns-query' can also punt to 'nslookup', so maybe getaddrinfo is
>>> better).
>>
>> getaddrinfo is probably a lot better.  `dns-query' isn't that good at
>> retries and the like, if I remember correctly.

dns-query can only do a single DNS query, which is unusable for proper
address resolution.

> He's just pointing out one of the MANY functions in emacs that allows
> you to look up an IP address. I've found at least 4, and we now
> introducing the 5th and 6th...

Address resolution isn't trivial, that's why getaddrinfo exists.

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
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