Re: IP address of failed/tried connections?

On 1/2/2020 12:34 AM, Ray Satiro wrote:
> libcurl saves that information only if a connection is made [1]. You
> may not be looking for debug strings but CURLINFO_TEXT is the fastest
> way I can think of to do what you're asking [2][3][4][5]. Either that
> or you modify libcurl for your own purposes to do it. (I don't think
> there's any interest to add such a feature upstream, but I'm sure I'll
> be shortly corrected if there is).

hm I'm a little scattered today, I just thought of
CURLOPT_OPENSOCKETFUNCTION [1] and CURLOPT_SOCKOPTFUNCTION [2]. You
could record the addresses on open and then use primary_ip to see which
one curl is using for the transfer. Also you could choose on open to do
the connection yourself and return CURL_SOCKOPT_ALREADY_CONNECTED if you
need that type information, such as you need to know always whether a
connection succeeded or not (remember libcurl may discard a successful
connection if another connection beat it due to happy eyeballs).

[1]: https://curl.haxx.se/libcurl/c/CURLOPT_OPENSOCKETFUNCTION.html
[2]: https://curl.haxx.se/libcurl/c/CURLOPT_SOCKOPTFUNCTION.html

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Received on 2020-01-02