74 lines
1.4 KiB
Markdown
74 lines
1.4 KiB
Markdown
|
---
|
||
|
|
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
|
||
|
|
SPDX-License-Identifier: curl
|
||
|
|
Title: CURLOPT_PREREQDATA
|
||
|
|
Section: 3
|
||
|
|
Source: libcurl
|
||
|
|
See-also:
|
||
|
|
- CURLINFO_PRIMARY_IP (3)
|
||
|
|
- CURLINFO_PRIMARY_PORT (3)
|
||
|
|
- CURLOPT_PREREQFUNCTION (3)
|
||
|
|
---
|
||
|
|
|
||
|
|
# NAME
|
||
|
|
|
||
|
|
CURLOPT_PREREQDATA - pointer passed to the pre-request callback
|
||
|
|
|
||
|
|
# SYNOPSIS
|
||
|
|
|
||
|
|
~~~c
|
||
|
|
#include <curl/curl.h>
|
||
|
|
|
||
|
|
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PREREQDATA, void *pointer);
|
||
|
|
~~~
|
||
|
|
|
||
|
|
# DESCRIPTION
|
||
|
|
|
||
|
|
Pass a *pointer* that is untouched by libcurl and passed as the first
|
||
|
|
argument in the pre-request callback set with CURLOPT_PREREQFUNCTION(3).
|
||
|
|
|
||
|
|
# DEFAULT
|
||
|
|
|
||
|
|
NULL
|
||
|
|
|
||
|
|
# PROTOCOLS
|
||
|
|
|
||
|
|
All
|
||
|
|
|
||
|
|
# EXAMPLE
|
||
|
|
|
||
|
|
~~~c
|
||
|
|
struct priv {
|
||
|
|
void *custom;
|
||
|
|
};
|
||
|
|
|
||
|
|
static int prereq_callback(void *clientp,
|
||
|
|
char *conn_primary_ip,
|
||
|
|
char *conn_local_ip,
|
||
|
|
int conn_primary_port,
|
||
|
|
int conn_local_port)
|
||
|
|
{
|
||
|
|
printf("Connection made to %s:%d\n", conn_primary_ip, conn_primary_port);
|
||
|
|
return CURL_PREREQFUNC_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
int main(void)
|
||
|
|
{
|
||
|
|
struct priv prereq_data;
|
||
|
|
CURL *curl = curl_easy_init();
|
||
|
|
if(curl) {
|
||
|
|
curl_easy_setopt(curl, CURLOPT_PREREQFUNCTION, prereq_callback);
|
||
|
|
curl_easy_setopt(curl, CURLOPT_PREREQDATA, &prereq_data);
|
||
|
|
curl_easy_perform(curl);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
~~~
|
||
|
|
|
||
|
|
# AVAILABILITY
|
||
|
|
|
||
|
|
Added in 7.80.0
|
||
|
|
|
||
|
|
# RETURN VALUE
|
||
|
|
|
||
|
|
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
|