Why is 16 too few? Do you have more than 8-16 name servers configured?
Remember, it is one fd per nameserver (or possibly 2 if it has to fall back
to TCP), NOT one fd per query, as my original reply stated.
The ares_getsock is what you'd use, and yes, it does have a limit of 16
fds.
-Brad
On 1/25/17 3:36 AM, David Guillen Fandos wrote:
> Yeah agreed, but how do you retrieve the fds to use poll?
> With getsock you get up to 16 sockets which is insufficient for my needs (and also, BTW, sounds like an arbitrary and
> ridiculous number to hardcode in such a function)
>
> Thanks!
>
> On 25/01/17 04:05, Zan Lynx wrote:
>>
>> That will not help because select has a hard coded limit of the number of bits in its read, write and error sets.
>>
>> What could help us to open c-ares socket very early in the program to get a low FD number. Or switch to poll. I posted
>> a half done, good enough for me poll fix to this list some years ago. Or use one of the other APIs to get the socket
>> descriptors and poll.
>>
Received on 2017-01-25