1 /**************************************************************** 2 * Licensed to the Apache Software Foundation (ASF) under one * 3 * or more contributor license agreements. See the NOTICE file * 4 * distributed with this work for additional information * 5 * regarding copyright ownership. The ASF licenses this file * 6 * to you under the Apache License, Version 2.0 (the * 7 * "License"); you may not use this file except in compliance * 8 * with the License. You may obtain a copy of the License at * 9 * * 10 * http://www.apache.org/licenses/LICENSE-2.0 * 11 * * 12 * Unless required by applicable law or agreed to in writing, * 13 * software distributed under the License is distributed on an * 14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * 15 * KIND, either express or implied. See the License for the * 16 * specific language governing permissions and limitations * 17 * under the License. * 18 ****************************************************************/ 19 20 21 22 package org.apache.james.smtpserver.core.filter; 23 24 import java.util.ArrayList; 25 import java.util.Collection; 26 27 import org.apache.avalon.framework.logger.AbstractLogEnabled; 28 import org.apache.james.dsn.DSNStatus; 29 import org.apache.james.smtpserver.CommandHandler; 30 import org.apache.james.smtpserver.SMTPSession; 31 32 /** 33 * Handles EHLO command 34 */ 35 public class EhloFilterCmdHandler extends AbstractLogEnabled implements CommandHandler { 36 37 /** 38 * The name of the command handled by the command handler 39 */ 40 private final static String COMMAND_NAME = "EHLO"; 41 42 /** 43 * processes EHLO command 44 * 45 * @see org.apache.james.smtpserver.CommandHandler#onCommand(SMTPSession) 46 **/ 47 public void onCommand(SMTPSession session) { 48 doEHLO(session, session.getCommandArgument()); 49 } 50 51 /** 52 * @param session SMTP session object 53 * @param argument the argument passed in with the command by the SMTP client 54 */ 55 private void doEHLO(SMTPSession session, String argument) { 56 String responseString = null; 57 58 session.resetState(); 59 60 if (argument == null) { 61 responseString = "501 "+DSNStatus.getStatus(DSNStatus.PERMANENT,DSNStatus.DELIVERY_INVALID_ARG)+" Domain address required: " + COMMAND_NAME; 62 session.writeResponse(responseString); 63 64 // After this filter match we should not call any other handler! 65 session.setStopHandlerProcessing(true); 66 } else { 67 // store provided name 68 session.getState().put(SMTPSession.CURRENT_HELO_NAME,argument); 69 } 70 } 71 72 /** 73 * @see org.apache.james.smtpserver.CommandHandler#getImplCommands() 74 */ 75 public Collection getImplCommands() { 76 Collection implCommands = new ArrayList(); 77 implCommands.add("EHLO"); 78 79 return implCommands; 80 } 81 82 }