| /* |
| * 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.felix.gogo.shell; |
| |
| import java.io.IOException; |
| import java.io.PrintStream; |
| import java.net.ServerSocket; |
| import java.net.Socket; |
| import java.net.InetAddress; |
| import java.util.List; |
| |
| import org.apache.felix.gogo.options.Option; |
| import org.apache.felix.gogo.options.Options; |
| import org.apache.felix.service.command.CommandProcessor; |
| import org.apache.felix.service.command.CommandSession; |
| |
| /* |
| * a very simple Telnet server. |
| * real remote access should be via ssh. |
| */ |
| public class Telnet implements Runnable |
| { |
| static final String[] functions = { "telnetd" }; |
| |
| private static final int defaultPort = 2019; |
| private final CommandProcessor processor; |
| private ServerSocket server; |
| private Thread thread; |
| private boolean quit; |
| private int port; |
| private String ip; |
| |
| public Telnet(CommandProcessor procesor) |
| { |
| this.processor = procesor; |
| } |
| |
| public void telnetd(String[] argv) throws IOException |
| { |
| final String[] usage = { "telnetd - start simple telnet server", |
| "Usage: telnetd [-i ip] [-p port] start | stop | status", |
| " -i --ip=INTERFACE listen interface (default=127.0.0.1)", |
| " -p --port=PORT listen port (default=" + defaultPort + ")", |
| " -? --help show help" }; |
| |
| Option opt = Options.compile(usage).parse(argv); |
| List<String> args = opt.args(); |
| |
| if (opt.isSet("help") || args.isEmpty()) |
| { |
| opt.usage(); |
| return; |
| } |
| |
| String command = args.get(0); |
| |
| if ("start".equals(command)) |
| { |
| if (server != null) |
| { |
| throw new IllegalStateException("telnetd is already running on port " + port); |
| } |
| ip = opt.get("ip"); |
| port = opt.getNumber("port"); |
| start(); |
| status(); |
| } |
| else if ("stop".equals(command)) |
| { |
| if (server == null) |
| { |
| throw new IllegalStateException("telnetd is not running."); |
| } |
| stop(); |
| } |
| else if ("status".equals(command)) |
| { |
| status(); |
| } |
| else |
| { |
| throw opt.usageError("bad command: " + command); |
| } |
| } |
| |
| private void status() |
| { |
| if (server != null) |
| { |
| System.out.println("telnetd is running on " + ip + ":" + port); |
| } |
| else |
| { |
| System.out.println("telnetd is not running."); |
| } |
| } |
| |
| private void start() throws IOException |
| { |
| quit = false; |
| InetAddress addr = "".equals(ip) ? null : InetAddress.getByName(ip); |
| server = new ServerSocket(port, 0, addr); |
| thread = new Thread(this, "Gogo telnet"); |
| thread.start(); |
| } |
| |
| private void stop() throws IOException |
| { |
| quit = true; |
| server.close(); |
| server = null; |
| thread.interrupt(); |
| } |
| |
| public void run() |
| { |
| try |
| { |
| while (!quit) |
| { |
| final Socket socket = server.accept(); |
| PrintStream out = new PrintStream(socket.getOutputStream()); |
| final CommandSession session = processor.createSession( |
| socket.getInputStream(), out, out); |
| Thread handler = new Thread(new Runnable() { |
| @Override |
| public void run() { |
| try |
| { |
| session.execute("gosh --login --noshutdown"); |
| } |
| catch (Exception e) |
| { |
| e.printStackTrace(); |
| } |
| finally |
| { |
| session.close(); |
| try |
| { |
| socket.close(); |
| } |
| catch (IOException e) |
| { |
| } |
| } |
| } |
| }); |
| handler.start(); |
| } |
| } |
| catch (IOException e) |
| { |
| if (!quit) |
| { |
| e.printStackTrace(); |
| } |
| } |
| finally |
| { |
| try |
| { |
| if (server != null) |
| { |
| server.close(); |
| } |
| } |
| catch (IOException e) |
| { |
| } |
| } |
| } |
| } |