84 lines
1.5 KiB
Markdown
84 lines
1.5 KiB
Markdown
|
---
|
||
|
|
c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
|
||
|
|
SPDX-License-Identifier: curl
|
||
|
|
Title: CURLOPT_IPRESOLVE
|
||
|
|
Section: 3
|
||
|
|
Source: libcurl
|
||
|
|
See-also:
|
||
|
|
- CURLOPT_HTTP_VERSION (3)
|
||
|
|
- CURLOPT_RESOLVE (3)
|
||
|
|
- CURLOPT_SSLVERSION (3)
|
||
|
|
---
|
||
|
|
|
||
|
|
# NAME
|
||
|
|
|
||
|
|
CURLOPT_IPRESOLVE - IP protocol version to use
|
||
|
|
|
||
|
|
# SYNOPSIS
|
||
|
|
|
||
|
|
~~~c
|
||
|
|
#include <curl/curl.h>
|
||
|
|
|
||
|
|
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_IPRESOLVE, long resolve);
|
||
|
|
~~~
|
||
|
|
|
||
|
|
# DESCRIPTION
|
||
|
|
|
||
|
|
Allows an application to select what kind of IP addresses to use when
|
||
|
|
establishing a connection or choosing one from the connection pool. This is
|
||
|
|
interesting when using host names that resolve to more than one IP family.
|
||
|
|
|
||
|
|
If the URL provided for a transfer contains a numerical IP version as a host
|
||
|
|
name, this option does not override or prohibit libcurl from using that IP
|
||
|
|
version.
|
||
|
|
|
||
|
|
Available values for this option are:
|
||
|
|
|
||
|
|
## CURL_IPRESOLVE_WHATEVER
|
||
|
|
|
||
|
|
Default, can use addresses of all IP versions that your system allows.
|
||
|
|
|
||
|
|
## CURL_IPRESOLVE_V4
|
||
|
|
|
||
|
|
Uses only IPv4 addresses.
|
||
|
|
|
||
|
|
## CURL_IPRESOLVE_V6
|
||
|
|
|
||
|
|
Uses only IPv6 addresses.
|
||
|
|
|
||
|
|
# DEFAULT
|
||
|
|
|
||
|
|
CURL_IPRESOLVE_WHATEVER
|
||
|
|
|
||
|
|
# PROTOCOLS
|
||
|
|
|
||
|
|
All
|
||
|
|
|
||
|
|
# EXAMPLE
|
||
|
|
|
||
|
|
~~~c
|
||
|
|
int main(void)
|
||
|
|
{
|
||
|
|
CURL *curl = curl_easy_init();
|
||
|
|
if(curl) {
|
||
|
|
CURLcode res;
|
||
|
|
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin");
|
||
|
|
|
||
|
|
/* of all addresses example.com resolves to, only IPv6 ones are used */
|
||
|
|
curl_easy_setopt(curl, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V6);
|
||
|
|
|
||
|
|
res = curl_easy_perform(curl);
|
||
|
|
|
||
|
|
curl_easy_cleanup(curl);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
~~~
|
||
|
|
|
||
|
|
# AVAILABILITY
|
||
|
|
|
||
|
|
Always
|
||
|
|
|
||
|
|
# RETURN VALUE
|
||
|
|
|
||
|
|
Returns CURLE_OK
|