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*
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* version 2 for more details (a copy is included in the LICENSE file that
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*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
/*
* @test
* @bug 4424096
* @summary DatagramPacket spec needs clarification (reuse buf)
* @run main ReuseBuf
* @run main/othervm -Djava.net.preferIPv4Stack=true ReuseBuf
* @run main/othervm -Djdk.net.usePlainDatagramSocketImpl=true ReuseBuf
*/
import java.net.*;
import static java.lang.System.out;
public class ReuseBuf {
static String msgs[] = {"Hello World", "Java", "Good Bye"};
static int port;
static class ServerThread extends Thread{
DatagramSocket ds;
public ServerThread() {
try {
InetAddress local = InetAddress.getLocalHost();
InetSocketAddress bindaddr = new InetSocketAddress(local, 0);
ds = new DatagramSocket(bindaddr);
port = ds.getLocalPort();
} catch (Exception e) {
throw new RuntimeException(e.getMessage());
}
}
public void run() {
byte b[] = new byte[100];
DatagramPacket dp = new DatagramPacket(b,b.length);
while (true) {
try {
ds.receive(dp);
String reply = new String(dp.getData(), dp.getOffset(), dp.getLength());
out.println("server: received [" + reply + "]");
for (int i=0; i<2; i++) {
out.println("server: sending [" + reply + "]");
ds.send(new DatagramPacket(reply.getBytes(), reply.length(),
dp.getAddress(), dp.getPort()));
}
if (reply.equals(msgs[msgs.length-1])) {
break;
}
} catch (Exception e) {
throw new RuntimeException(e.getMessage());
}
}
ds.close();
}
}
public static void main(String args[]) throws Exception {
ServerThread st = new ServerThread();
st.start();
InetAddress local = InetAddress.getLocalHost();
InetSocketAddress bindaddr = new InetSocketAddress(local, 0);
DatagramSocket ds = new DatagramSocket(bindaddr);
byte b[] = new byte[100];
DatagramPacket dp = new DatagramPacket(b,b.length);
for (int i = 0; i < msgs.length; i++) {
out.println("client: sending [" + msgs[i] + "]");
ds.send(new DatagramPacket(msgs[i].getBytes(),msgs[i].length(),
InetAddress.getLocalHost(),
port));
ds.receive(dp);
String recvmsg = new String(dp.getData(), dp.getOffset(), dp.getLength());
out.println("client: received [" + recvmsg + "]");
if (!msgs[i].equals(recvmsg)) {
throw new RuntimeException("Msg expected: " + msgs[i] +
", msg received: " + recvmsg);
}
byte ba[] = new byte[1];
DatagramPacket dp2 = new DatagramPacket(ba, ba.length);
dp2.setData(new byte[99], 5, 3); // only 3 bytes
ds.receive(dp2);
String expectedMsg = msgs[i].substring(0, 3);
recvmsg = new String(dp2.getData(), dp2.getOffset(), dp2.getLength());
out.println("client: received [" + recvmsg + "]");
if (!expectedMsg.equals(recvmsg)) {
throw new RuntimeException("Msg truncated expected: " + expectedMsg +
", msg received: "+ recvmsg);
}
}
ds.close();
out.println("Test Passed!!!");
st.join();
}
}