Guang Zhu | 6bf18ba | 2009-09-15 23:47:20 -0700 | [diff] [blame] | 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 | |
Guang Zhu | f4bf552 | 2009-07-23 14:19:35 -0700 | [diff] [blame] | 17 | package com.android.dumprendertree.forwarder; |
| 18 | |
| 19 | import android.util.Log; |
| 20 | |
| 21 | import java.io.IOException; |
| 22 | import java.io.InputStream; |
| 23 | import java.io.OutputStream; |
| 24 | import 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 | */ |
| 33 | public 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 | } |