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CURLINFO_TLS_SSL_PTR.3: improve the example 

The previous example was a little bit confusing, because SSL* structure
(or other "in use" SSL connection pointer) is not accessible after the
transfer is completed, therefore working with the raw TLS library
specific pointer needs to be done during transfer.

Closes #2690
This commit is contained in:
Adrian Peniak 2018-06-28 06:56:16 +01:00 committed by Daniel Stenberg
parent eebd3bb68a
commit 24cb114c53
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1 changed files with 27 additions and 8 deletions
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35
docs/libcurl/opts/CURLINFO_TLS_SSL_PTR.3
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@ -5,7 +5,7 @@
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
.\" * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
@ -129,14 +129,33 @@ https://github.com/curl/curl/issues/685
All TLS-based
.SH EXAMPLE
.nf
CURL *curl = curl_easy_init();
if(curl) {
#include <curl/curl.h>
#include <openssl/ssl.h>
CURL *curl;
static size_t wf(void *ptr, size_t size, size_t nmemb, void *stream)
{
const struct curl_tlssessioninfo *info = NULL;
CURLcode res = curl_easy_getinfo(curl, CURLINFO_TLS_SSL_PTR, &info);
if(info && !res) {
if(CURLSSLBACKEND_OPENSSL == info->backend) {
printf("OpenSSL ver. %s\\n", SSL_get_version((SSL*)info->internals));
}
}
return size * nmemb;
}
int main(int argc, char** argv)
{
CURLcode res;
struct curl_tlssessioninfo *tls;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
res = curl_easy_perform(curl);
curl_easy_getinfo(curl, CURLINFO_TLS_SSL_PTR, &tls);
curl_easy_cleanup(curl);
curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, wf);
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
return res;
}
.fi
.SH AVAILABILITY