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/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed 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 android.core;
import junit.framework.TestCase;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketTimeoutException;
import android.test.suitebuilder.annotation.LargeTest;
/**
* Implements some simple tests for datagrams. Not as excessive as the core
* tests, but good enough for the harness.
*/
public class DatagramTest extends TestCase {
/**
* Helper class that listens to incoming datagrams and reflects them to the
* sender. Incoming datagram is interpreted as a String. It is uppercased
* before being sent back.
*/
class Reflector extends Thread {
// Helper class for reflecting incoming datagrams.
DatagramSocket socket;
boolean alive = true;
byte[] buffer = new byte[256];
DatagramPacket packet;
/**
* Main loop. Receives datagrams and reflects them.
*/
@Override
public void run() {
try {
while (alive) {
try {
packet.setLength(buffer.length);
socket.receive(packet);
String s = stringFromPacket(packet);
// System.out.println(s + " (from " + packet.getAddress() + ":" + packet.getPort() + ")");
try {
Thread.sleep(100);
} catch (InterruptedException ex) {
// Ignore.
}
stringToPacket(s.toUpperCase(), packet);
packet.setAddress(InetAddress.getLocalHost());
packet.setPort(2345);
socket.send(packet);
} catch (java.io.InterruptedIOException e) {
}
}
} catch (java.io.IOException ex) {
ex.printStackTrace();
} finally {
socket.close();
}
}
/**
* Creates a new Relfector object for the given local address and port.
*/
public Reflector(int port, InetAddress address) {
try {
packet = new DatagramPacket(buffer, buffer.length);
socket = new DatagramSocket(port, address);
} catch (IOException ex) {
throw new RuntimeException(
"Creating datagram reflector failed", ex);
}
}
}
/**
* Converts a given datagram packet's contents to a String.
*/
static String stringFromPacket(DatagramPacket packet) {
return new String(packet.getData(), 0, packet.getLength());
}
/**
* Converts a given String into a datagram packet.
*/
static void stringToPacket(String s, DatagramPacket packet) {
byte[] bytes = s.getBytes();
System.arraycopy(bytes, 0, packet.getData(), 0, bytes.length);
packet.setLength(bytes.length);
}
/**
* Implements the main part of the Datagram test.
*/
@LargeTest
public void testDatagram() throws Exception {
Reflector reflector = null;
DatagramSocket socket = null;
try {
// Setup the reflector, so we have a partner to send to
reflector = new Reflector(1234, InetAddress.getLocalHost());
reflector.start();
byte[] buffer = new byte[256];
DatagramPacket packet = new DatagramPacket(buffer, buffer.length);
socket = new DatagramSocket(2345, InetAddress.getLocalHost());
// Send ten simple packets and check for the expected responses.
for (int i = 1; i <= 10; i++) {
String s = "Hello, Android world #" + i + "!";
stringToPacket(s, packet);
packet.setAddress(InetAddress.getLocalHost());
packet.setPort(1234);
socket.send(packet);
try {
Thread.sleep(100);
} catch (InterruptedException ex) {
// Ignore.
}
packet.setLength(buffer.length);
socket.receive(packet);
String t = stringFromPacket(packet);
// System.out.println(t + " (from " + packet.getAddress() + ":" + packet.getPort() + ")");
assertEquals(s.toUpperCase(), t);
}
} finally {
if (reflector != null) {
reflector.alive = false;
}
if (socket != null) {
socket.close();
}
}
}
// Regression test for issue 1018003: DatagramSocket ignored a set timeout.
@LargeTest
public void testDatagramSocketSetSOTimeout() throws Exception {
DatagramSocket sock = null;
int timeout = 5000;
long start = System.currentTimeMillis();
try {
sock = new DatagramSocket();
DatagramPacket pack = new DatagramPacket(new byte[100], 100);
sock.setSoTimeout(timeout);
sock.receive(pack);
} catch (SocketTimeoutException e) {
// expected
long delay = System.currentTimeMillis() - start;
if (Math.abs(delay - timeout) > 1000) {
fail("timeout was not accurate. expected: " + timeout
+ " actual: " + delay + " miliseconds.");
}
} finally {
if (sock != null) {
sock.close();
}
}
}
}
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