| /* |
| * 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.jline.telnet; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.io.PrintStream; |
| import java.util.List; |
| |
| import org.apache.felix.gogo.jline.Shell; |
| import org.apache.felix.gogo.jline.Shell.Context; |
| import org.apache.felix.service.command.CommandProcessor; |
| import org.apache.felix.service.command.CommandSession; |
| import org.jline.builtins.Options; |
| import org.jline.terminal.Size; |
| import org.jline.terminal.Terminal; |
| import org.jline.terminal.Terminal.Signal; |
| import org.jline.terminal.TerminalBuilder; |
| |
| /* |
| * a very simple Telnet server. |
| * real remote access should be via ssh. |
| */ |
| public class Telnet { |
| public static final String[] functions = {"telnetd"}; |
| |
| private static final int defaultPort = 2019; |
| private final CommandProcessor processor; |
| private PortListener portListener; |
| private int port; |
| private String ip; |
| |
| public Telnet(CommandProcessor procesor) { |
| this.processor = procesor; |
| } |
| |
| public void telnetd(CommandSession session, 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"}; |
| |
| Options opt = Options.compile(usage).parse(argv); |
| List<String> args = opt.args(); |
| |
| if (opt.isSet("help") || args.isEmpty()) { |
| opt.usage(System.err); |
| return; |
| } |
| |
| String command = args.get(0); |
| |
| if ("start".equals(command)) { |
| if (portListener != null) { |
| throw new IllegalStateException("telnetd is already running on port " + port); |
| } |
| ip = opt.get("ip"); |
| port = opt.getNumber("port"); |
| start(session); |
| status(); |
| } else if ("stop".equals(command)) { |
| if (portListener == 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 (portListener != null) { |
| System.out.println("telnetd is running on " + ip + ":" + port); |
| } else { |
| System.out.println("telnetd is not running."); |
| } |
| } |
| |
| private void start(CommandSession session) { |
| ConnectionManager connectionManager = new ConnectionManager(1000, 5 * 60 * 1000, 5 * 60 * 1000, 60 * 1000, null, null, false) { |
| @Override |
| protected Connection createConnection(ThreadGroup threadGroup, ConnectionData newCD) { |
| return new Connection(threadGroup, newCD) { |
| TelnetIO telnetIO; |
| |
| @Override |
| protected void doRun() throws Exception { |
| telnetIO = new TelnetIO(); |
| telnetIO.setConnection(this); |
| telnetIO.initIO(); |
| |
| InputStream in = new InputStream() { |
| @Override |
| public int read() throws IOException { |
| return telnetIO.read(); |
| } |
| @Override |
| public int read(byte[] b, int off, int len) throws IOException { |
| int r = read(); |
| if (r >= 0) { |
| b[off] = (byte) r; |
| return 1; |
| } else { |
| return -1; |
| } |
| } |
| }; |
| PrintStream out = new PrintStream(new OutputStream() { |
| @Override |
| public void write(int b) throws IOException { |
| telnetIO.write(b); |
| } |
| @Override |
| public void flush() throws IOException { |
| telnetIO.flush(); |
| } |
| }); |
| Terminal terminal = TerminalBuilder.builder() |
| .type(getConnectionData().getNegotiatedTerminalType().toLowerCase()) |
| .streams(in, out) |
| .system(false) |
| .name("telnet") |
| .build(); |
| terminal.setSize(new Size(getConnectionData().getTerminalColumns(), getConnectionData().getTerminalRows())); |
| terminal.setAttributes(Shell.getTerminal(session).getAttributes()); |
| addConnectionListener(new ConnectionListener() { |
| @Override |
| public void connectionIdle(ConnectionEvent ce) { |
| } |
| |
| @Override |
| public void connectionTimedOut(ConnectionEvent ce) { |
| } |
| |
| @Override |
| public void connectionLogoutRequest(ConnectionEvent ce) { |
| } |
| |
| @Override |
| public void connectionSentBreak(ConnectionEvent ce) { |
| } |
| |
| @Override |
| public void connectionTerminalGeometryChanged(ConnectionEvent ce) { |
| terminal.setSize(new Size(getConnectionData().getTerminalColumns(), getConnectionData().getTerminalRows())); |
| terminal.raise(Signal.WINCH); |
| } |
| }); |
| PrintStream pout = new PrintStream(terminal.output()); |
| CommandSession session = processor.createSession(terminal.input(), pout, pout); |
| session.put(Shell.VAR_TERMINAL, terminal); |
| Context context = new Context() { |
| @Override |
| public String getProperty(String name) { |
| return System.getProperty(name); |
| } |
| @Override |
| public void exit() { |
| close(); |
| } |
| }; |
| new Shell(context, processor).gosh(session, new String[]{"--login"}); |
| } |
| |
| @Override |
| protected void doClose() { |
| telnetIO.closeOutput(); |
| telnetIO.closeInput(); |
| } |
| }; |
| } |
| }; |
| portListener = new PortListener("gogo", port, 10); |
| portListener.setConnectionManager(connectionManager); |
| portListener.start(); |
| } |
| |
| private void stop() { |
| portListener.stop(); |
| portListener = null; |
| } |
| |
| } |