server/rest: forward real client IP on proxied request

needs new proxmox dependency to get the RpcEnvironment changes,
adding client_ip getter and setter.

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

src/api2/access.rs

@@ -138,6 +138,7 @@ fn create_ticket(
     path: Option<String>,
     privs: Option<String>,
     port: Option<u16>,
+    rpcenv: &mut dyn RpcEnvironment,
 ) -> Result<Value, Error> {
     match authenticate_user(&username, &password, path, privs, port) {
         Ok(true) => {
@@ -157,7 +158,11 @@ fn create_ticket(
             "username": username,
         })),
         Err(err) => {
-            let client_ip = "unknown"; // $rpcenv->get_client_ip() || '';
+            let client_ip = match rpcenv.get_client_ip().map(|addr| addr.ip()) {
+                Some(ip) => format!("{}", ip),
+                None => "unknown".into(),
+            };
+
             log::error!("authentication failure; rhost={} user={} msg={}", client_ip, username, err.to_string());
             Err(http_err!(UNAUTHORIZED, "permission check failed."))
         }