package test.unit.gov.nist.javax.sip.stack.acktransport;
import gov.nist.javax.sip.SipStackImpl;
import gov.nist.javax.sip.address.SipUri;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Properties;
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.SipException;
import javax.sip.SipFactory;
import javax.sip.SipListener;
import javax.sip.SipProvider;
import javax.sip.SipStack;
import javax.sip.TimeoutEvent;
import javax.sip.TransactionTerminatedEvent;
import javax.sip.address.Address;
import javax.sip.address.AddressFactory;
import javax.sip.address.SipURI;
import javax.sip.header.CSeqHeader;
import javax.sip.header.HeaderFactory;
import javax.sip.header.RecordRouteHeader;
import javax.sip.header.RouteHeader;
import javax.sip.header.ViaHeader;
import javax.sip.message.MessageFactory;
import javax.sip.message.Request;
import javax.sip.message.Response;
import junit.framework.TestCase;
import org.apache.log4j.ConsoleAppender;
import org.apache.log4j.Logger;
import org.apache.log4j.SimpleLayout;
import test.tck.TestHarness;
import test.tck.msgflow.callflows.ProtocolObjects;
/**
* A very simple forking proxy server.
*
* @author M. Ranganathan
*
*/
public class Proxy 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 HashMap<String,SipProvider> sipProviders = new HashMap<String,SipProvider>();
private static String unexpectedException = "Unexpected exception";
private static Logger logger = Logger.getLogger(Proxy.class);
private static AddressFactory addressFactory;
private static MessageFactory messageFactory;
private static HeaderFactory headerFactory;
private SipStack sipStack;
static {
logger.addAppender(new ConsoleAppender(new SimpleLayout()));
}
private void sendTo(ServerTransaction st, Request request, int targetPort) throws Exception {
Request newRequest = (Request) request.clone();
SipURI sipUri = addressFactory.createSipURI("UA1", "127.0.0.1");
sipUri.setPort(targetPort);
sipUri.setLrParam();
sipUri.setTransportParam(Shootme.transport);
Address address = addressFactory.createAddress("client1", sipUri);
RouteHeader rheader = headerFactory.createRouteHeader(address);
newRequest.addFirst(rheader);
ViaHeader viaHeader = headerFactory.createViaHeader(host, this.port, "udp", null);
newRequest.addFirst(viaHeader);
ClientTransaction ct1 = sipProviders.get(Shootme.transport).getNewClientTransaction(newRequest);
sipUri = addressFactory.createSipURI("proxy", "127.0.0.1");
address = addressFactory.createAddress("proxy", sipUri);
sipUri.setPort(5070);
sipUri.setLrParam();
RecordRouteHeader recordRoute = headerFactory.createRecordRouteHeader(address);
newRequest.addHeader(recordRoute);
ct1.setApplicationData(st);
ct1.sendRequest();
}
public void processRequest(RequestEvent requestEvent) {
try {
Request request = requestEvent.getRequest();
SipProvider sipProvider = (SipProvider) requestEvent.getSource();
this.inviteServerTxProvider = sipProvider;
if (request.getMethod().equals(Request.INVITE)) {
// Attach a record route header with NO transport here.
ServerTransaction st = null;
if (requestEvent.getServerTransaction() == null) {
st = sipProvider.getNewServerTransaction(request);
}
this.sendTo(st,request,5080 );
} 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);
String transport = ((SipURI) newRequest.getRequestURI()).getTransportParam();
sipProviders.get(transport).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();
TestCase.fail("unexpected exception");
}
}
public void processTimeout(TimeoutEvent timeoutEvent) {
logger.error("Timeout occured");
TestCase.fail("unexpected event");
}
public void processIOException(IOExceptionEvent exceptionEvent) {
logger.info("IOException occured");
TestCase.fail("unexpected exception io exception");
}
public SipProvider createSipProvider(String transport) {
try {
ListeningPoint listeningPoint = sipStack.createListeningPoint(host, port, transport.toUpperCase());
SipProvider sipProvider = sipStack.createSipProvider(listeningPoint);
this.sipProviders.put(transport, sipProvider);
return sipProvider;
} catch (Exception ex) {
logger.error(unexpectedException, ex);
ex.printStackTrace();
TestCase.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) {
TestCase.fail("unexpected event");
}
public Proxy(int myPort) {
this.port = myPort;
SipObjects sipObjects = new SipObjects(myPort, "proxy","off");
addressFactory = sipObjects.addressFactory;
messageFactory = sipObjects.messageFactory;
headerFactory = sipObjects.headerFactory;
this.sipStack = sipObjects.sipStack;
}
public void stop() {
this.sipStack.stop();
}
}