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Re: Custom resolve of Address
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From: Rainer Canavan via curl-library <curl-library_at_lists.haxx.se>
Date: Mon, 22 Nov 2021 13:50:32 +0100
On Mon, Nov 22, 2021 at 1:33 PM Marcel via curl-library
<curl-library_at_lists.haxx.se> wrote:
>
> Hey everyone,
>
> I'm in need of a callback, that let me resolve a domain to an IP address.
[...]
> how to intercept the c-ares query, e.g. by using a callback in that library which then will resolve a name to a IP address.
You can always override function calls by re-routing them into your
own dynamic library before passing it on to the original - at least on
Linux and similar systems.
You can skip the LD_PRELOAD if you're linking your own program. The
examples below should be sufficient to get you started with this:
https://www.linuxjournal.com/article/7795
https://hackerboss.com/overriding-system-functions-for-fun-and-profit/
rainer
Date: Mon, 22 Nov 2021 13:50:32 +0100
On Mon, Nov 22, 2021 at 1:33 PM Marcel via curl-library
<curl-library_at_lists.haxx.se> wrote:
>
> Hey everyone,
>
> I'm in need of a callback, that let me resolve a domain to an IP address.
[...]
> how to intercept the c-ares query, e.g. by using a callback in that library which then will resolve a name to a IP address.
You can always override function calls by re-routing them into your
own dynamic library before passing it on to the original - at least on
Linux and similar systems.
You can skip the LD_PRELOAD if you're linking your own program. The
examples below should be sufficient to get you started with this:
https://www.linuxjournal.com/article/7795
https://hackerboss.com/overriding-system-functions-for-fun-and-profit/
rainer
-- Unsubscribe: https://lists.haxx.se/listinfo/curl-library Etiquette: https://curl.haxx.se/mail/etiquette.htmlReceived on 2021-11-22