1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) 2021, Max Dymond, <max.dymond@microsoft.com>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_PREREQDATA 3 "2 Aug 2021" "libcurl 7.80.0" "curl_easy_setopt options"
.SH NAME
CURLOPT_PREREQDATA \- pointer passed to the pre-request callback
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PREREQDATA, void *pointer);
.fi
.SH DESCRIPTION
Pass a \fIpointer\fP that will be untouched by libcurl and passed as the first
argument in the pre-request callback set with
\fICURLOPT_PREREQFUNCTION(3)\fP.
.SH DEFAULT
NULL
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
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:%s\\n", conn_primary_ip, conn_primary_port);
return CURL_PREREQFUNC_OK;
}
{
struct data prereq_data;
curl_easy_setopt(CURL *handle, CURLOPT_PREREQFUNCTION, prereq_callback);
curl_easy_setopt(CURL *handle, CURLOPT_PREREQDATA, &prereq_data);
}
.fi
.SH AVAILABILITY
Added in 7.80.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLOPT_PREREQFUNCTION "(3) "
|
