test.tck.msgflow.callflows.forkedinvite.Proxy Maven / Gradle / Ivy

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package test.tck.msgflow.callflows.forkedinvite;

import java.util.Hashtable;
import java.util.Iterator;

import javax.sip.ClientTransaction;
import javax.sip.DialogTerminatedEvent;
import javax.sip.IOExceptionEvent;
import javax.sip.ListeningPoint;
import javax.sip.RequestEvent;
import javax.sip.ResponseEvent;
import javax.sip.ServerTransaction;
import javax.sip.SipListener;
import javax.sip.SipProvider;
import javax.sip.TimeoutEvent;
import javax.sip.TransactionTerminatedEvent;
import javax.sip.address.Address;
import javax.sip.address.SipURI;
import javax.sip.header.CSeqHeader;
import javax.sip.header.RecordRouteHeader;
import javax.sip.header.RouteHeader;
import javax.sip.header.ViaHeader;
import javax.sip.message.Request;
import javax.sip.message.Response;

import org.apache.log4j.Logger;

import test.tck.TestHarness;
import test.tck.msgflow.callflows.ProtocolObjects;

/**
 * A very simple forking proxy server.
 * 
 * @author M. Ranganathan
 * 
 */
public class Proxy extends TestHarness implements SipListener {

	// private ServerTransaction st;

	private SipProvider inviteServerTxProvider;

	private Hashtable clientTxTable = new Hashtable();

	private static String host = "127.0.0.1";

	private int port = 5070;

	private SipProvider sipProvider;

	private static String unexpectedException = "Unexpected exception";

	private static Logger logger = Logger.getLogger(Proxy.class);

	private ProtocolObjects protocolObjects;

	public void processRequest(RequestEvent requestEvent) {
		try {
			Request request = requestEvent.getRequest();
			SipProvider sipProvider = (SipProvider) requestEvent.getSource();
			this.inviteServerTxProvider = sipProvider;
			if (request.getMethod().equals(Request.INVITE)) {

				ListeningPoint lp = sipProvider
						.getListeningPoint(protocolObjects.transport);
				String host = lp.getIPAddress();
				int port = lp.getPort();

				ServerTransaction st = null;
				if (requestEvent.getServerTransaction() == null) {
					st = sipProvider.getNewServerTransaction(request);

				}
				Request newRequest = (Request) request.clone();
				SipURI sipUri = protocolObjects.addressFactory.createSipURI(
						"UA1", "127.0.0.1");
				sipUri.setPort(5080);
				sipUri.setLrParam();
				Address address = protocolObjects.addressFactory.createAddress(
						"client1", sipUri);
				RouteHeader rheader = protocolObjects.headerFactory
						.createRouteHeader(address);

				newRequest.addFirst(rheader);
				ViaHeader viaHeader = protocolObjects.headerFactory
						.createViaHeader(host, port, protocolObjects.transport,
								null);
				newRequest.addFirst(viaHeader);
				ClientTransaction ct1 = sipProvider
						.getNewClientTransaction(newRequest);
				sipUri = protocolObjects.addressFactory.createSipURI("proxy",
						"127.0.0.1");
				address = protocolObjects.addressFactory.createAddress("proxy",
						sipUri);
				sipUri.setPort(5070);
				sipUri.setLrParam();
				RecordRouteHeader recordRoute = protocolObjects.headerFactory
						.createRecordRouteHeader(address);
				newRequest.addHeader(recordRoute);
				ct1.setApplicationData(st);
				this.clientTxTable.put(new Integer(5080), ct1);

				newRequest = (Request) request.clone();
				sipUri = protocolObjects.addressFactory.createSipURI("UA2",
						"127.0.0.1");
				sipUri.setLrParam();
				sipUri.setPort(5090);
				address = protocolObjects.addressFactory.createAddress(
						"client2", sipUri);
				rheader = protocolObjects.headerFactory
						.createRouteHeader(address);
				newRequest.addFirst(rheader);
				viaHeader = protocolObjects.headerFactory.createViaHeader(host,
						port, protocolObjects.transport, null);
				newRequest.addFirst(viaHeader);
				sipUri = protocolObjects.addressFactory.createSipURI("proxy",
						"127.0.0.1");
				sipUri.setPort(5070);
				sipUri.setLrParam();
				sipUri.setTransportParam(protocolObjects.transport);
				address = protocolObjects.addressFactory.createAddress("proxy",
						sipUri);

				recordRoute = protocolObjects.headerFactory
						.createRecordRouteHeader(address);

				newRequest.addHeader(recordRoute);
				ClientTransaction ct2 = sipProvider
						.getNewClientTransaction(newRequest);
				ct2.setApplicationData(st);
				this.clientTxTable.put(new Integer(5090), ct2);

				// Send the requests out to the two listening points of the
				// client.

				ct2.sendRequest();
				ct1.sendRequest();

			} else {
				// Remove the topmost route header
				// The route header will make sure it gets to the right place.
				logger.info("proxy: Got a request " + request.getMethod());
				Request newRequest = (Request) request.clone();
				newRequest.removeFirst(RouteHeader.NAME);
				sipProvider.sendRequest(newRequest);
			}

		} catch (Exception ex) {
			ex.printStackTrace();
			System.exit(0);
		}

	}

	public void processResponse(ResponseEvent responseEvent) {
		try {
			Response response = responseEvent.getResponse();
			CSeqHeader cseq = (CSeqHeader) response.getHeader(CSeqHeader.NAME);
			logger.info("ClientTxID = "
					+ responseEvent.getClientTransaction()
					+ " client tx id "
					+ ((ViaHeader) response.getHeader(ViaHeader.NAME))
							.getBranch() + " CSeq header = "
					+ response.getHeader(CSeqHeader.NAME) + " status code = "
					+ response.getStatusCode());

			// JvB: stateful proxy MUST NOT forward 100 Trying
			if (response.getStatusCode() == 100)
				return;

			if (cseq.getMethod().equals(Request.INVITE)) {
				ClientTransaction ct = responseEvent.getClientTransaction();
				if (ct != null) {
					ServerTransaction st = (ServerTransaction) ct
							.getApplicationData();

					// Strip the topmost via header
					Response newResponse = (Response) response.clone();
					newResponse.removeFirst(ViaHeader.NAME);
					// The server tx goes to the terminated state.

					st.sendResponse(newResponse);
				} else {
					// Client tx has already terminated but the UA is
					// retransmitting
					// just forward the response statelessly.
					// Strip the topmost via header

					Response newResponse = (Response) response.clone();
					newResponse.removeFirst(ViaHeader.NAME);
					// Send the retransmission statelessly
					this.inviteServerTxProvider.sendResponse(newResponse);
				}
			} else {
				// this is the OK for the cancel.
				logger.info("Got a non-invite response " + response);
			}
		} catch (Exception ex) {
			ex.printStackTrace();
			fail("unexpected exception");
		}
	}

	public void processTimeout(TimeoutEvent timeoutEvent) {
		logger.error("Timeout occured");
		fail("unexpected event");
	}

	public void processIOException(IOExceptionEvent exceptionEvent) {
		logger.info("IOException occured");
		fail("unexpected exception io exception");
	}

	public SipProvider createSipProvider() {
		try {
			ListeningPoint listeningPoint = protocolObjects.sipStack
					.createListeningPoint(host, port, protocolObjects.transport);

			sipProvider = protocolObjects.sipStack
					.createSipProvider(listeningPoint);
			return sipProvider;
		} catch (Exception ex) {
			logger.error(unexpectedException, ex);
			fail(unexpectedException);
			return null;
		}

	}

	public void processTransactionTerminated(
			TransactionTerminatedEvent transactionTerminatedEvent) {
		logger.info("Transaction terminated event occured -- cleaning up");
		if (!transactionTerminatedEvent.isServerTransaction()) {
			ClientTransaction ct = transactionTerminatedEvent
					.getClientTransaction();
			for (Iterator it = this.clientTxTable.values().iterator(); it
					.hasNext();) {
				if (it.next().equals(ct)) {
					it.remove();
				}
			}
		} else {
			logger.info("Server tx terminated! ");
		}
	}

	public void processDialogTerminated(
			DialogTerminatedEvent dialogTerminatedEvent) {
		fail("unexpected event");
	}

	public Proxy(int myPort, ProtocolObjects protocolObjects) {
		this.port = myPort;
		this.protocolObjects = protocolObjects;
	}

}