001    /*
002     * Copyright 2010 the original author or authors.
003     * 
004     *  Licensed under the Apache License, Version 2.0 (the "License");
005     *  you may not use this file except in compliance with the License.
006     *  You may obtain a copy of the License at
007     *
008     *      http://www.apache.org/licenses/LICENSE-2.0
009     *
010     *  Unless required by applicable law or agreed to in writing, software
011     *  distributed under the License is distributed on an "AS IS" BASIS,
012     *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     *  See the License for the specific language governing permissions and
014     *  limitations under the License.
015     */
016    package com.hs.mail.smtp.processor;
017    
018    import java.util.StringTokenizer;
019    
020    import com.hs.mail.container.config.Config;
021    import com.hs.mail.container.server.socket.TcpTransport;
022    import com.hs.mail.smtp.SmtpException;
023    import com.hs.mail.smtp.SmtpSession;
024    
025    /**
026     * Handler for HELO command.
027     * 
028     * @author Won Chul Doh
029     * @since May 29, 2010
030     *
031     */
032    public class HeloProcessor extends AbstractSmtpProcessor {
033    
034            @Override
035            protected void doProcess(SmtpSession session, TcpTransport trans,
036                            StringTokenizer st) throws SmtpException {
037                    if (st.countTokens() < 1) {
038                            throw new SmtpException(SmtpException.MISSING_DOMAIN_ADDRESS);
039                    } else {
040                            String clientDomain = nextToken(st);
041                            if (clientDomain.length() > 256) {
042                                    throw new SmtpException(SmtpException.DOMAIN_NAME_LENGTH_LIMIT);
043                            } else {
044                                    session.setClientDomain(clientDomain);
045                                    session.setProtocol("SMTP");
046                                    StringBuilder sb = new StringBuilder().append("250 ")
047                                                    .append(Config.getHelloName())
048                                                    .append(" Hello ")
049                                                    .append(session.getRemoteHost())
050                                                    .append(" [")
051                                                    .append(session.getRemoteIP())
052                                                    .append("]");
053                                    session.writeResponse(sb.toString());
054                            }
055                    }
056            }
057    
058    }