/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.commons.net.echo;

import java.io.InputStream;

import org.apache.commons.net.discard.DiscardTCPClient;

/**
 * The EchoTCPClient class is a TCP implementation of a client for the Echo protocol described in RFC 862. To use the class, merely establish a connection with
 * {@link org.apache.commons.net.SocketClient#connect connect } and call {@link DiscardTCPClient#getOutputStream getOutputStream() } to retrieve the echo output
 * stream and {@link #getInputStream getInputStream() } to get the echo input stream. Don't close either stream when you're done using them. Rather, call
 * {@link org.apache.commons.net.SocketClient#disconnect disconnect } to clean up properly.
 *
 * @see EchoUDPClient
 * @see DiscardTCPClient
 */

public final class EchoTCPClient extends DiscardTCPClient {
    /** The default echo port. It is set to 7 according to RFC 862. */
    public static final int DEFAULT_PORT = 7;

    /**
     * The default EchoTCPClient constructor. It merely sets the default port to <code> DEFAULT_PORT </code>.
     */
    public EchoTCPClient() {
        setDefaultPort(DEFAULT_PORT);
    }

    /**
     * Returns an InputStream from which you may read echoed data from the server. You should NOT close the InputStream when you're finished reading from it.
     * Rather, you should call {@link org.apache.commons.net.SocketClient#disconnect disconnect } to clean up properly.
     *
     * @return An InputStream from which you can read echoed data from the server.
     */
    public InputStream getInputStream() {
        return _input_;
    }

}
