package test.unit.gov.nist.javax.sip.stack.forkedinvite482;
import java.util.HashSet;
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.Transaction;
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 HashSet clientTxTable = new HashSet<ClientTransaction>();
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;
private boolean loopDetectedSeen;
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(5080);
sipUri.setLrParam();
RecordRouteHeader recordRoute = protocolObjects.headerFactory
.createRecordRouteHeader(address);
newRequest.addHeader(recordRoute);
ct1.setApplicationData(st);
this.clientTxTable.add(ct1);
newRequest = (Request) request.clone();
sipUri = protocolObjects.addressFactory.createSipURI("UA2", "127.0.0.1");
sipUri.setLrParam();
sipUri.setPort(5080);
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(5080);
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.add(ct2);
// Send the requests out to the two listening points of the
// client.
ct2.sendRequest();
Thread.sleep((int) ( Math.abs((Math.random() * 1000 ))));
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 checkState() {
assertTrue("Should see LOOP DETECTED", loopDetectedSeen);
}
public synchronized 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 (response.getStatusCode() == Response.LOOP_DETECTED) {
logger.info("Saw a LOOP DETECTED response");
this.loopDetectedSeen = true;
}
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 {
logger.debug("Discarding response - no transaction found!");
}
} 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);
sipProvider.setAutomaticDialogSupportEnabled(false);
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.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;
}
}