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+---
+c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
+SPDX-License-Identifier: curl
+Title: CURLOPT_HAPROXY_CLIENT_IP
+Section: 3
+Source: libcurl
+See-also:
+  - CURLOPT_HAPROXYPROTOCOL (3)
+  - CURLOPT_PROXY (3)
+---
+
+# NAME
+
+CURLOPT_HAPROXY_CLIENT_IP - set HAProxy PROXY protocol client IP
+
+# SYNOPSIS
+
+~~~c
+#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.
+
+# DEFAULT
+
+NULL, no HAProxy header is sent
+
+# PROTOCOLS
+
+HTTP, HAProxy PROTOCOL
+
+# EXAMPLE
+
+~~~c
+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
+
+Along with HTTP. Added in 8.2.0.
+
+# RETURN VALUE
+
+Returns CURLE_OK if HTTP is enabled, and CURLE_UNKNOWN_OPTION if not.