[Gajim-devel] blocking getaddrinfo

Yann Leboulanger asterix at lagaule.org
Tue Jul 1 15:39:07 CEST 2008

Damien Thébault a écrit :
> Le vendredi 27 juin 2008 à 11:45 +0200, Yann Leboulanger a écrit :
>> Tomas Karasek wrote:
>>> What I'm looking for is either
>>>  - some elegant way how to do both A and AAAA requests asynchronously
>>>    (like nonblocking getaddrinfo) which would be a nice solution
>>> or
>>>  - nonblocking detect that network is down which would allow to avoid
>>>    needless call of getaddrinfo (temporary solution until some
>>> suitable        library appears)
>>> Do you have any ideas/suggestions on this?
>> Another solution is to create python bindings for libasyncns:
>> http://0pointer.de/lennart/projects/libasyncns/
> Hello everyone,
> After reading Tomas Karasek's mail, I found libasyncns too.
> This afternoon, I hacked a python binding while I was on a train (and
> some hours after that), and I'm now able to use libasyncns from python.
> Currently, it's not very clean (currently it's a first draft), it's
> using swig (so we can see some "garbage" from python, like wrappers, but
> it has some interesting features too).
> Anyway, I'm able to do the same things than the "asyncns-test.c" file
> from the libasyncns' documentation [1] (but in ~25 lines instead of
> ~125) (see the file asyncns-test.py).
> I'm joining the code with this mail, if someone is interested. For
> example, it may be used to test how gajim may work with libasyncns
> someday (but I don't know what gajim needs).
> (I didn't put licensing information already but it's LGPL2+, like the
> libasyncns library)
> Keep in mind that this is a work in progress, currently:
>  - exceptions should work
>  - IPv6 isn't available in getnameinfo
>  - I don't store values from requests so I can't use a query object
>    twice
>  - some functions are not implemented:
>       asyncns_getnext(), asyncns_getnqueries(), asyncns_getuserdata(),
>       asyncns_setuserdata(), asyncns_res_search(), asyncns_fd()...
>  - this is not deeply tested, and for example I don't know how memory is
>    managed
> [1]: http://0pointer.de/lennart/projects/libasyncns/doxygen/asyncns-test_8c-example.html
> Regards,

Wow cool ! We unfortunatly don't have much time now because we'd like to 
release very very soon, but that would be very cool to finalize that. 
What are you plans about those bindings? Do you think to send them to 
author so that he can release them? Do you think to start  new project 
to them?

But for sure it's interesting as it's the only async python module that 
allows AAAA resolution.


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