1 /* 2 * Copyright (c) 2003, 2020, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * 26 * 27 * Used in conjunction to EchoService to test System.inheritedChannel(). 28 * 29 * The first test is the TCP echo test. A service is launched with a TCP 30 * socket and a TCP message is sent to the service. The test checks that 31 * the message is correctly echoed. 32 * 33 * The second test is a UDP echo test. A service is launched with a UDP 34 * socket and a UDP packet is sent to the service. The test checks that 35 * the packet is correctly echoed. 36 * 37 */ 38 import java.io.IOException; 39 import java.net.DatagramPacket; 40 import java.nio.ByteBuffer; 41 import java.nio.channels.DatagramChannel; 42 import java.nio.channels.SelectionKey; 43 import java.nio.channels.Selector; 44 import java.nio.channels.SocketChannel; 45 import java.util.Random; 46 47 import jdk.test.lib.Utils; 48 49 public class EchoTest { 50 51 private static int failures = 0; 52 53 private static String ECHO_SERVICE = "EchoService"; 54 55 /* 56 * Sends a message with random bytes to the service, and then waits for 57 * a reply (with timeout). Once the reply is received it is checked to ensure 58 * that it matches the original message. 59 */ TCPEchoTest()60 private static void TCPEchoTest() throws IOException { 61 SocketChannel sc = Launcher.launchWithInetSocketChannel(ECHO_SERVICE, null); 62 63 String msg = "Where's that damn torpedo?"; 64 int repeat = 100; 65 int size = msg.length() * repeat; 66 67 // generate bytes into a buffer and send it to the service 68 69 ByteBuffer bb1 = ByteBuffer.allocate(size); 70 Random gen = new Random(); 71 for (int i=0; i<repeat; i++) { 72 bb1.put(msg.getBytes("UTF-8")); 73 } 74 bb1.flip(); 75 sc.write(bb1); 76 77 // now we put the channel into non-blocking mode and we read the 78 // reply from the service into a second buffer. 79 80 ByteBuffer bb2 = ByteBuffer.allocate(size+100); 81 sc.configureBlocking(false); 82 Selector sel = sc.provider().openSelector(); 83 SelectionKey sk = sc.register(sel, SelectionKey.OP_READ); 84 int nread = 0; 85 long to = Utils.adjustTimeout(5000); 86 while (nread < size) { 87 long st = System.currentTimeMillis(); 88 sel.select(to); 89 if (sk.isReadable()) { 90 int n = sc.read(bb2); 91 if (n > 0) { 92 nread += n; 93 } 94 if (n < 0) { 95 break; // EOF 96 } 97 } 98 sel.selectedKeys().remove(sk); 99 to -= System.currentTimeMillis() - st; 100 if (to <= 0) { 101 break; 102 } 103 } 104 sc.close(); 105 106 // and compare the response 107 108 boolean err = false; 109 110 if (nread != size) { 111 err = true; 112 } else { 113 bb1.flip(); 114 bb2.flip(); 115 while (bb1.hasRemaining()) { 116 if (bb1.get() != bb2.get()) { 117 err = true; 118 } 119 } 120 } 121 122 // if error print out the response from the service (could be a stack trace) 123 if (err) { 124 System.err.println("Bad response or premature EOF, bytes read: "); 125 bb2.flip(); 126 while (bb2.hasRemaining()) { 127 char c = (char)bb2.get(); 128 System.out.print(c); 129 } 130 throw new RuntimeException("Bad response or premature EOF from service"); 131 } 132 } 133 134 /* 135 * Send a UDP packet to the service, wait for a reply (with timeout). Finally 136 * check that the packet is the same length as the original. 137 */ UDPEchoTest()138 private static void UDPEchoTest() throws IOException { 139 DatagramChannel dc = Launcher.launchWithDatagramChannel(ECHO_SERVICE, null); 140 141 String msg = "I was out saving the galaxy when your grandfather was in diapers"; 142 143 ByteBuffer bb = ByteBuffer.wrap(msg.getBytes("UTF-8")); 144 dc.write(bb); 145 146 // and receive the echo 147 byte b[] = new byte[msg.length() + 100]; 148 DatagramPacket pkt2 = new DatagramPacket(b, b.length); 149 dc.socket().setSoTimeout((int)Utils.adjustTimeout(5000)); 150 dc.socket().receive(pkt2); 151 152 if (pkt2.getLength() != msg.length()) { 153 throw new RuntimeException("Received packet of incorrect length"); 154 } 155 156 dc.close(); 157 } 158 main(String args[])159 public static void main(String args[]) throws IOException { 160 161 // TCP echo 162 try { 163 TCPEchoTest(); 164 System.out.println("TCP echo test passed."); 165 } catch (Exception x) { 166 System.err.println(x); 167 failures++; 168 } 169 170 // UDP echo 171 try { 172 UDPEchoTest(); 173 System.out.println("UDP echo test passed."); 174 } catch (Exception x) { 175 x.printStackTrace(); 176 System.err.println(x); 177 failures++; 178 } 179 180 if (failures > 0) { 181 throw new RuntimeException("Test failed - see log for details"); 182 } 183 } 184 185 } 186