NAME

       CURLOPT_HAPROXY_CLIENT_IP - set HAProxy PROXY protocol client IP

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HAPROXY_CLIENT_IP,
                                 char *client_ip);

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 CURLOPT_HAPROXYPROTOCOL(3) as that one cannot use a specified address.

       Using this option multiple times makes the last set string override the previous ones. Set it to NULL  to
       disable its use again.

       The application does not have to keep the string around after setting this option.

DEFAULT

       NULL, no HAProxy header is sent

PROTOCOLS

       This functionality affects all supported protocols

EXAMPLE

       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);
         }
       }

AVAILABILITY

       Added in curl 8.2.0

RETURN VALUE

       curl_easy_setopt(3) returns a CURLcode indicating success or error.

       CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3).

SEE ALSO

       CURLOPT_HAPROXYPROTOCOL(3), CURLOPT_PROXY(3)

libcurl                                            2025-06-16                       CURLOPT_HAPROXY_CLIENT_IP(3)