async dns

[common at gmx.ch]

Ryan Dahl wrote:
> Hello
> Is anyone doing DNS lookups with libev?
yes

> Do you use Ian Jackson's adns?
no

> Perhaps you have some code you can share?
yes

I use udns, single socket, *very* easy to embed, good documentation, udp 
only, but does aaaa records, leightweight.

http://www.corpit.ru/mjt/udns.html


example code
 > http://svn.carnivore.it/browser/dump/libev_udns.c
it is a little large as I
  * have a timeout for each domain (you don't want to miss this)
  * do a&aaaa resolves for each domain (tomorrow ...)
  * sort the results by af & 'number' for each domain (prefer ipv6 - if 
availible)

leakfree in valgrind.


MfG
Markus