.\" generated by cd2nroff 0.1 from CURLOPT_HAPROXY_CLIENT_IP.md
.TH CURLOPT_HAPROXY_CLIENT_IP 3 "2024-11-18" libcurl
.SH NAME
CURLOPT_HAPROXY_CLIENT_IP \- set HAProxy PROXY protocol client IP
.SH SYNOPSIS
.nf
#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HAPROXY_CLIENT_IP,
                          char *client_ip);
.fi
.SH DESCRIPTION
When this parameter is set to a valid IPv4 or IPv6 numerical address, the
library sends this address as client address in the HAProxy PROXY protocol v1
header at beginning of the connection.

This option is an alternative to \fICURLOPT_HAPROXYPROTOCOL(3)\fP as that one
cannot use a specified address.
.SH DEFAULT
NULL, no HAProxy header is sent
.SH PROTOCOLS
This functionality affects all supported protocols
.SH EXAMPLE
.nf
int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode ret;
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
    curl_easy_setopt(curl, CURLOPT_HAPROXY_CLIENT_IP, "1.1.1.1");
    ret = curl_easy_perform(curl);
  }
}
.fi
.SH AVAILABILITY
Added in curl 8.2.0
.SH RETURN VALUE
Returns CURLE_OK if HTTP is enabled, and CURLE_UNKNOWN_OPTION if not.
.SH SEE ALSO
.BR CURLOPT_HAPROXYPROTOCOL (3),
.BR CURLOPT_PROXY (3)