On Fri, 4 Mar 2005, codemastr wrote:

> Microsoft (and I'm sure others) have a pretty simple solution for this that
> they use in many of the WinAPI calls. Basically, you have the user specify
> the size of the structure:
>
> struct curl_options copt;
>
> copt.struct_size = sizeof(struct curl_options);

Yes, that's a neat way to deal with it. Another way that I've introduced in
the curl_version_info() is that the first struct member is a 'version' info
and apps always set it to "CURLVERSION_NOW". The header is then responsible to
have it increased when the struct changes.

In this particular case, another option to solve this would be to delay the
creation of the ares "channel" to after the curl handle is made and then allow
ordinary curl_easy_setopt() calls to change these ares things. Then we could
even close and recreate the ares channel if options are changed "mid stream".

Hm, thinking more about it, I believe I begin to favour this latter way...

-- 
      Daniel Stenberg -- http://curl.haxx.se -- http://daniel.haxx.se
       Dedicated custom curl help for hire: http://haxx.se/curl.html