As I promised in my previous article here is very simple Client Server example for SCTP in Java. If you still have not installed and tested OpenJDK please follow the instructions given in my previous article.
SCTP Server
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.nio.ByteBuffer;
import com.sun.nio.sctp.MessageInfo;
import com.sun.nio.sctp.SctpChannel;
import com.sun.nio.sctp.SctpServerChannel;
/**
* @author sandarenu
* $LastChangedDate$
* $LastChangedBy$
* $LastChangedRevision$
*/
public class SctpServer {
public static void main(String[] args) throws IOException {
SocketAddress serverSocketAddress = new InetSocketAddress(1111);
System.out.println("create and bind for sctp address");
SctpServerChannel sctpServerChannel = SctpServerChannel.open().bind(serverSocketAddress);
System.out.println("address bind process finished successfully");
SctpChannel sctpChannel;
while ((sctpChannel = sctpServerChannel.accept()) != null) {
System.out.println("client connection received");
System.out.println("sctpChannel.getRemoteAddresses() = " + sctpChannel.getRemoteAddresses());
System.out.println("sctpChannel.association() = " + sctpChannel.association());
MessageInfo messageInfo = sctpChannel.receive(ByteBuffer.allocate(64000) , null, null);
System.out.println(messageInfo);
}
}
}
SCTP Client
import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.nio.ByteBuffer;
import com.sun.nio.sctp.MessageInfo;
import com.sun.nio.sctp.SctpChannel;
/**
* @author sandarenu
* $LastChangedDate$
* $LastChangedBy$
* $LastChangedRevision$
*/
public class SctpClient {
public static void main(String[] args) throws IOException {
try {
SocketAddress socketAddress = new InetSocketAddress( 6050);
System.out.println("open connection for socket [" + socketAddress + "]");
SctpChannel sctpChannel = SctpChannel.open();//(socketAddress, 1 ,1 );
sctpChannel.bind(new InetSocketAddress( 6060));
sctpChannel.connect(socketAddress, 1 ,1);
System.out.println("sctpChannel.getRemoteAddresses() = " + sctpChannel.getRemoteAddresses());
System.out.println("sctpChannel.getAllLocalAddresses() = " + sctpChannel.getAllLocalAddresses());
System.out.println("sctpChannel.isConnectionPending() = " + sctpChannel.isConnectionPending());
System.out.println("sctpChannel.isOpen() = " + sctpChannel.isOpen());
System.out.println("sctpChannel.isRegistered() = " + sctpChannel.isRegistered());
System.out.println("sctpChannel.provider() = " + sctpChannel.provider());
System.out.println("sctpChannel.association() = " + sctpChannel.association());
System.out.println("send bytes");
final ByteBuffer byteBuffer = ByteBuffer.allocate(64000);
//Simple M3ua ASP_Up message
byte [] message = new byte []{1,0,3,1,0,0,0,24,0,17,0,8,0,0,0,1,0,4,0,8,84,101,115,116};
final MessageInfo messageInfo = MessageInfo.createOutGoing(null, 0);
System.out.println("messageInfo = " + messageInfo);
System.out.println("messageInfo.streamNumber() = " + messageInfo.streamNumber());
byteBuffer.put(message);
byteBuffer.flip();
try {
sctpChannel.send(byteBuffer, messageInfo);
} catch (Exception e) {
e.printStackTrace();
}
System.out.println("close connection");
sctpChannel.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
