/*

  * Copyright 2008 the original author or authors.

  *

  * Licensed under the Apache License, Version 2.0 (the "License");

  * you may not use this file except in compliance with the License.

  * You may obtain a copy of the License at

  *

  *      http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 package org.mockftpserver.fake.command;

 import org.mockftpserver.core.command.Command;

 import org.mockftpserver.core.command.ReplyCodes;

 import org.mockftpserver.core.session.Session;

 import org.mockftpserver.core.util.PortParser;

 import java.net.InetAddress;

 /**

  * CommandHandler for the PASV command. Handler logic:

  * <ol>

  * <li>If the user has not logged in, then reply with 530</li>

  * <li>Otherwise, request the Session to switch to passive data connection mode. Return a reply code of 227,

  * along with response text of the form: "<i>(h1,h2,h3,h4,p1,p2)</i>", where <i>h1..h4</i> are the

  * 4 bytes of the 32-bit internet host address of the server, and <i>p1..p2</i> are the 2

  * bytes of the 16-bit TCP port address of the data connection on the server to which

  * the client must connect. See RFC959 for more information.</i>

  * </ol>

  *

  * @author Chris Mair

  * @version $Revision: 182 $ - $Date: 2008-11-30 21:37:49 -0500 (Sun, 30 Nov 2008) $

  */

 public class PasvCommandHandler extends AbstractFakeCommandHandler {

     protected void handle(Command command, Session session) {

         verifyLoggedIn(session);

         int port = session.switchToPassiveMode();

         InetAddress server = session.getServerHost();

         LOG.debug("server=" + server + " port=" + port);

         String hostAndPort = PortParser.convertHostAndPortToCommaDelimitedBytes(server, port);

         sendReply(session, ReplyCodes.PASV_OK, "pasv", list(hostAndPort));

     }

 }