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 25 import java.util.ArrayList; 26 import java.util.Collection; 27 28 import org.apache.avalon.framework.logger.AbstractLogEnabled; 29 import org.apache.james.smtpserver.CommandHandler; 30 import org.apache.james.smtpserver.SMTPSession; 31 32 33 /** 34 * Handles HELO command 35 */ 36 public class HeloFilterCmdHandler extends AbstractLogEnabled implements CommandHandler { 37 38 /** 39 * The name of the command handled by the command handler 40 */ 41 private final static String COMMAND_NAME = "HELO"; 42 43 /** 44 * process HELO command 45 * 46 * @see org.apache.james.smtpserver.CommandHandler#onCommand(SMTPSession) 47 **/ 48 public void onCommand(SMTPSession session) { 49 doHELO(session, session.getCommandArgument()); 50 } 51 52 /** 53 * @param session SMTP session object 54 * @param argument the argument passed in with the command by the SMTP client 55 */ 56 private void doHELO(SMTPSession session, String argument) { 57 String responseString = null; 58 59 session.resetState(); 60 61 if (argument == null) { 62 responseString = "501 Domain address required: " + COMMAND_NAME; 63 session.writeResponse(responseString); 64 getLogger().info(responseString); 65 66 // After this filter match we should not call any other handler! 67 session.setStopHandlerProcessing(true); 68 69 } else { 70 // store provided name 71 session.getState().put(SMTPSession.CURRENT_HELO_NAME,argument); 72 } 73 } 74 75 /** 76 * @see org.apache.james.smtpserver.CommandHandler#getImplCommands() 77 */ 78 public Collection getImplCommands() { 79 Collection implCommands = new ArrayList(); 80 implCommands.add("HELO"); 81 82 return implCommands; 83 } 84 85 }