content: /*
   * Dumbster - a dummy SMTP server
   * Copyright 2016 Joachim Nicolay
   * Copyright 2004 Jason Paul Kitchen
   * 
   * 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 dk.aau.netsec.hostage.protocol.utils.smptUtils;
  
  /**
   * SMTP server state.
   */
  public class SmtpState {
  	/** Internal representation of the state. */
  	private byte value;
  
  	/** Internal representation of the CONNECT state. */
  	private static final byte CONNECT_BYTE = (byte) 1;
  	/** Internal representation of the GREET state. */
  	private static final byte GREET_BYTE = (byte) 2;
  	/** Internal representation of the MAIL state. */
  	private static final byte MAIL_BYTE = (byte) 3;
  	/** Internal representation of the RCPT state. */
  	private static final byte RCPT_BYTE = (byte) 4;
  	/** Internal representation of the DATA_HEADER state. */
  	private static final byte DATA_HEADER_BYTE = (byte) 5;
  	/** Internal representation of the DATA_BODY state. */
  	private static final byte DATA_BODY_BYTE = (byte) 6;
  	/** Internal representation of the QUIT state. */
  	private static final byte QUIT_BYTE = (byte) 7;
  
  	/** CONNECT state: waiting for a client connection. */
  	public static final SmtpState CONNECT = new SmtpState(CONNECT_BYTE);
  	/** GREET state: wating for a ELHO message. */
  	static final SmtpState GREET = new SmtpState(GREET_BYTE);
  	/** MAIL state: waiting for the MAIL FROM: command. */
  	static final SmtpState MAIL = new SmtpState(MAIL_BYTE);
  	/** RCPT state: waiting for a RCPT &lt;email address&gt; command. */
  	static final SmtpState RCPT = new SmtpState(RCPT_BYTE);
  	/** Waiting for headers. */
  	static final SmtpState DATA_HDR = new SmtpState(DATA_HEADER_BYTE);
  	/** Processing body text. */
  	static final SmtpState DATA_BODY = new SmtpState(DATA_BODY_BYTE);
  	/** End of client transmission. */
  	static final SmtpState QUIT = new SmtpState(QUIT_BYTE);
  
  	/**
  	 * Create a new SmtpState object. Private to ensure that only valid states can be created.
  	 * @param value one of the _BYTE values.
  	 */
  	private SmtpState(byte value) {
  		this.value = value;
  	}
  
  	/**
  	 * String representation of this SmtpState.
  	 * @return a String
  	 */
  	public String toString() {
  		switch(value) {
  			case CONNECT_BYTE:
  				return "CONNECT";
  			case GREET_BYTE:
  				return "GREET";
  			case MAIL_BYTE:
  				return "MAIL";
  			case RCPT_BYTE:
  				return "RCPT";
  			case DATA_HEADER_BYTE:
  				return "DATA_HDR";
  			case DATA_BODY_BYTE:
  				return "DATA_BODY";
  			case QUIT_BYTE:
  				return "QUIT";
  			default:
  				return "Unknown";
  		}
  	}
  }
  