Testing gethostbyname() blocking

[raseel...@gmail.com]

Hi,

I am planning to replace the gethostbyname() blocking call with the
asynchronous library routines , i.e., libcares.

But, before I do that, how do I go about testing the blocking call ,
and subsequently on replacing with libcares routines, the
asynchronousity (i know ,it;s not even a word)

Thanks,
Raseel
http://www.raseel.in/techblog

[Bin Chen]

On Feb 19, 5:15 pm, "raseelbha...@gmail.com" <raseelbha...@gmail.com>
wrote:

> Hi,
>
> I am planning to replace the gethostbyname() blocking call with the
> asynchronous library routines , i.e., libcares.
>
> But, before I do that, how do I go about testing the blocking call ,
> and subsequently on replacing with libcares routines, the
> asynchronousity (i know ,it;s not even a word)
>

Fill a dummy address in /etc/resolv.conf.

[James Antill]

On Tue, 19 Feb 2008 01:15:34 -0800, raseel...@gmail.com wrote:

> Hi,
>
> I am planning to replace the gethostbyname() blocking call with the
> asynchronous library routines , i.e., libcares.
>
> But, before I do that, how do I go about testing the blocking call , and
> subsequently on replacing with libcares routines, the asynchronousity (i
> know ,it;s not even a word)

First note that these are not the same thing, so you cannot replace one
with the other directly.

c-ares[1] is an async. DNS resolver library.

gethostbyname() / getaddrinfo() / etc. are functions which resolve a name
to a sockaddr * based on system configuration. This need not use DNS, and
at the very least is likely to include /etc/hosts type lookups as well as
DNS.

[1] Assuming you mean: http://daniel.haxx.se/projects/c-ares/

--
James Antill -- ja...@and.org
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read-only/fixed. Ave. 44% overhead over strdup(), for 0-20B strings
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