add showChoice ()

fix addIPAllocation () show warnings

* showChoice(): new function
* addIPAllocation (): add showChoice
	fix warning messages
	use IPV4_AUTO_RELEASE config var

wwwroot/inc/functions.php

@@ -5117,6 +5117,35 @@ function showNotice  ($message, $option = '')
 	setMessage ('neutral', $message, $option == 'inline');
 }
 
+// asks ok/cancel question
+// return string 'true' or 'false'
+// adds 'answer' to request post data and repeats request
+function showChoice ($question)
+{
+	if (isset ($_POST['answer']))
+		return $_POST['answer'];
+
+	$form = "<form id=choice method=post action='?{$_SERVER['QUERY_STRING']}'>";
+	foreach($_POST as $name => $value)
+		$form .= "<input type=hidden name='$name' value='$value'>";
+	$form .= "<input type=hidden id=answer name=answer value='false'>";
+	$form .= '</form>';
+
+	$msg = $question;
+	$question = str_replace ('<br>', '\n', $question);
+	$question = str_replace ("'", "\'", $question);
+	$msg .= <<<ENDMSG
+		$form
+		<script type="text/javascript">
+		answer = confirm('$question');
+		$('input#answer').val(answer);
+		$('form#choice').submit();
+		</script>
+ENDMSG;
+
+	setMessage ('warning', $msg, FALSE);
+}
+
 // do not call this directly, use showError and its siblings instead
 // $type could be 'error', 'warning', 'success' or 'neutral'
 function setMessage ($type, $message, $direct_rendering)

wwwroot/inc/ophandlers.php

@@ -1010,10 +1010,33 @@ function addIPAllocation ()
 		return;
 	}
 
-	if($address['reserved'] && $address['name'] != '')
+	$autorelease = getConfigVar('IPV4_AUTO_RELEASE');
+	if ($autorelease > 0)
 	{
-		showWarning("IP ".ip_format($ip_bin)." reservation \"".$address['name']."\" is removed");
-		//TODO ask to take reserved IP or not !
+		$reserved = $ipname = FALSE;
+		if ($autorelease >= 1 && $address['reserved'] == 'yes')
+			$reserved = TRUE;
+		if ($autorelease >= 2 && $address['name'] != '')
+			$ipname = TRUE;
+
+		if ($reserved || $ipname)
+		{
+			if (showChoice ('Assign IP '.ip_format($ip_bin).'?<br>'.
+				($reserved ? 'IP reservation will be removed!<br>' : '').
+				($ipname ? 'IP name "'.$address['name'].'" will be removed!' : '')
+				) != 'true')
+			{
+				showWarning('IP '.ip_format($ip_bin).' NOT assigned<br>'.
+					($reserved ? 'IP is still reserved!<br>' : '').
+					($ipname ? 'IP name "'.$address['name'].'" unchanged' : ''));
+
+				return buildRedirectURL (NULL, NULL, array ('hl_ip' => ip_format ($ip_bin)));
+			}
+
+			showWarning('IP '.ip_format($ip_bin).' assigned<br>'.
+				($reserved ? 'IP is NO longer reserved!<br>' : '').
+				($ipname ? 'IP name "'.$address['name'].'" removed!' : ''));
+		}
 	}
 
 	bindIPToObject