On Fri, Apr 08, 2016 at 08:16:16PM +0000, Tom Goetze via curl-library wrote:
> Thanks for the feedback Dan.
>
> gdb showed CURLE_FAILED_INIT as the return value (numerical value was 2) from
> the curl_easy_setopt
> During the curl_easy_perform() with a breakpoint in the callback never hit the
> breakpoint, so the failure during setup was accurate.
> rpm says I have curl-7.19.7-40.el6_6.1x86_64 in case that helps explain how my
> situation could have occurred.

That does explain it—in that version (which is over 6 years old, BTW) libcurl
returned CURLE_FAILED_INIT instead of CURLE_NOT_BUILT_IN for unsupported
options.

> However, since you said it is not likely to work in my situation, I will not
> pursue this approach much more.

CentOS 6.7 uses NSS which almost guarantees that Red Hat 6.6 does, too, and NSS
doesn't support this callback.

>
> On Friday, April 8, 2016 12:40 PM, Dan Fandrich <dan_at_coneharvesters.com> wrote:
>
>
> On Fri, Apr 08, 2016 at 03:26:28PM +0000, Tom Goetze via curl-library wrote:
> > Following the example from: https://curl.haxx.se/libcurl/c/
> > CURLOPT_SSL_CTX_FUNCTION.html
> > My attempts at setting CURLOPT_SSL_CTX_FUNCTION are failing in the call:
> >
> > rv=curl_easy_setopt(ch, CURLOPT_SSL_CTX_FUNCTION, *sslctx_function);
> >
> >
> > I always get rv == CURLE_FAILED_INIT
>
> Is it the curl_easy_setopt() call the returns CURLE_FAILED_INIT or the
> subsequent curl_easy_perform()? I don't see how the former can return this
> error. If it's not supported, curl_easy_setopt() will return
> CURLE_NOT_BUILT_IN.
>
> > Any pointers on how to debug it? I believe it should have been built against
> > OpenSSL, but since it is a system installed libcurl, I am not sure how I can
> > validate (on RedHat 6.6). I mentioned this, since the docs says this feature
> is
> > not always available, so interested to know how to check (unless the above is
> > the check).
>
> Red Hat uses NSS, not OpenSSL, so I wouldn't expect it to work, regardless of
> which error you get back.
>
> >>> Dan
-------------------------------------------------------------------
List admin: https://cool.haxx.se/list/listinfo/curl-library
Etiquette: https://curl.haxx.se/mail/etiquette.html
Received on 2016-04-08