1/* 2 * Copyright (C) 2009 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.dumprendertree.forwarder; 18 19import android.util.Log; 20 21import java.io.IOException; 22import java.io.InputStream; 23import java.io.OutputStream; 24import java.net.Socket; 25 26/** 27 * 28 * Worker class for {@link ForwardServer}. A Forwarder will be created once the ForwardServer 29 * accepts an incoming connection, and it will then forward the incoming/outgoing streams to a 30 * connection already proxied by adb networking (see also {@link AdbUtils}). 31 * 32 */ 33public class Forwarder { 34 35 private ForwardServer server; 36 private Socket from, to; 37 38 private static final String LOGTAG = "Forwarder"; 39 40 public Forwarder (Socket from, Socket to, ForwardServer server) { 41 this.server = server; 42 this.from = from; 43 this.to = to; 44 server.register(this); 45 } 46 47 public void start() { 48 Thread outgoing = new Thread(new SocketPipe(from, to)); 49 Thread incoming = new Thread(new SocketPipe(to, from)); 50 outgoing.setName(LOGTAG); 51 incoming.setName(LOGTAG); 52 outgoing.start(); 53 incoming.start(); 54 } 55 56 public void stop() { 57 shutdown(from); 58 shutdown(to); 59 } 60 61 private void shutdown(Socket socket) { 62 try { 63 socket.shutdownInput(); 64 } catch (IOException e) { 65 Log.v(LOGTAG, "Socket#shutdownInput", e); 66 } 67 try { 68 socket.shutdownOutput(); 69 } catch (IOException e) { 70 Log.v(LOGTAG, "Socket#shutdownOutput", e); 71 } 72 try { 73 socket.close(); 74 } catch (IOException e) { 75 Log.v(LOGTAG, "Socket#close", e); 76 } 77 } 78 79 private class SocketPipe implements Runnable { 80 81 private Socket in, out; 82 83 public SocketPipe(Socket in, Socket out) { 84 this.in = in; 85 this.out = out; 86 } 87 88 public void run() { 89 try { 90 int length; 91 InputStream is = in.getInputStream(); 92 OutputStream os = out.getOutputStream(); 93 byte[] buffer = new byte[4096]; 94 while ((length = is.read(buffer)) > 0) { 95 os.write(buffer, 0, length); 96 } 97 } catch (IOException ioe) { 98 } finally { 99 server.unregister(Forwarder.this); 100 } 101 } 102 103 @Override 104 public String toString() { 105 return "SocketPipe{" + in + "=>" + out + "}"; 106 } 107 } 108} 109