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  package examples.prack;
  
  import javax.sip.*;
  import javax.sip.header.*;
  import java.util.*;

This class is a UAC template. Shootist is the guy that shoots and shootme is the guy that gets shot.

Author(s):
M. Ranganathan
 
 
 public class Shootme implements SipListener {
 
     private static AddressFactory addressFactory;
 
     private static MessageFactory messageFactory;
 
     private static HeaderFactory headerFactory;
 
     private static SipStack sipStack;
 
     private static final String myAddress = "127.0.0.1";
 
     private static final int myPort = 5070;
 
     protected ServerTransaction inviteTid;
 
     private Request inviteRequest;
 
     private Dialog dialog;
 
     private String toTag;
 
     protected static final String usageString = "java "
             + "examples.shootist.Shootist \n"
             + ">>>> is your class path set to the root?";
 
     private static void usage() {
         ..println();
         System.exit(0);
 
     }
 
     public void processRequest(RequestEvent requestEvent) {
         Request request = requestEvent.getRequest();
         ServerTransaction serverTransactionId = requestEvent
                 .getServerTransaction();
 
         ..println("\n\nRequest " + request.getMethod()
                 + " received at " + .getStackName()
                 + " with server transaction id " + serverTransactionId);
 
         if (request.getMethod().equals(.)) {
             processInvite(requestEventserverTransactionId);
         } else if (request.getMethod().equals(.)) {
             processAck(requestEventserverTransactionId);
         } else if (request.getMethod().equals(.)) {
             processBye(requestEventserverTransactionId);
         } else if (request.getMethod().equals(.)) {
             processCancel(requestEventserverTransactionId);
         } else if (request.getMethod().equals(.)) {
             processPrack(requestEventserverTransactionId);
         }
 
     }
 
     private void processPrack(RequestEvent requestEvent,
             ServerTransaction serverTransactionId) {
         try {
             ..println("shootme: got an PRACK! ");
             ..println("Dialog State = " + .getState());

            
JvB: First, send 200 OK for PRACK
 
             Request prack = requestEvent.getRequest();
             Response prackOk = .createResponse( 200, prack );
             serverTransactionId.sendResponseprackOk );

            
Send a 200 OK response to complete the 3 way handshake for the INIVTE.
 
             Response response = .createResponse(200,
                     );
             ToHeader to = (ToHeaderresponse.getHeader(.);
             to.setTag(this.);
             Address address = .createAddress("Shootme <sip:"
                     +  + ":" +  + ">");
             ContactHeader contactHeader = 
                     .createContactHeader(address);
             response.addHeader(contactHeader);
             .sendResponse(response);
         } catch (Exception ex) {
             ex.printStackTrace();
        }
    }
    public void processResponse(ResponseEvent responseEvent) {
    }

    
Process the ACK request. Send the bye and complete the call flow.
    public void processAck(RequestEvent requestEvent,
            ServerTransaction serverTransaction) {
        try {
            ..println("shootme: got an ACK! Sending  a BYE");
            ..println("Dialog State = " + .getState());
            Dialog dialog = serverTransaction.getDialog();
            SipProvider provider = (SipProviderrequestEvent.getSource();
            Request byeRequest = dialog.createRequest(.);
            ClientTransaction ct = provider.getNewClientTransaction(byeRequest);
            dialog.sendRequest(ct);
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    
Process the invite request.
    public void processInvite(RequestEvent requestEvent,
            ServerTransaction serverTransaction) {
        SipProvider sipProvider = (SipProviderrequestEvent.getSource();
        Request request = requestEvent.getRequest();
        try {
            ..println("shootme: got an Invite sending Trying");
            // System.out.println("shootme: " + request);
            Response response = .createResponse(.,
                    request);
            ServerTransaction st = requestEvent.getServerTransaction();
            if (st == null) {
                st = sipProvider.getNewServerTransaction(request);
            }
             = st.getDialog();
            st.sendResponse(response);
            // reliable provisional response. Use the API here!
            // Response okResponse = messageFactory.createResponse(183, request);
            Response sessionProgress = .createReliableProvisionalResponse(
                    . );
            ToHeader toHeader = (ToHeadersessionProgress.getHeader(.);
            this. = "4321";
            toHeader.setTag(); // Application is supposed to set.
            this. = st;
            this. = request;
            ..println("sending reliable provisional response.");
            // It is essential to use this API here!
            .sendReliableProvisionalResponse(sessionProgress);
            // new Timer().schedule(new MyTimerTask(this), 100);
        } catch (Exception ex) {
            ex.printStackTrace();
            System.exit(0);
        }
    }

    
Process the bye request.
    public void processBye(RequestEvent requestEvent,
            ServerTransaction serverTransactionId) {
        SipProvider sipProvider = (SipProviderrequestEvent.getSource();
        Request request = requestEvent.getRequest();
        try {
            ..println("shootme:  got a bye sending OK.");
            Response response = .createResponse(200, request);
            serverTransactionId.sendResponse(response);
            ..println("Dialog State is "
                    + serverTransactionId.getDialog().getState());
        } catch (Exception ex) {
            ex.printStackTrace();
            System.exit(0);
        }
    }
    public void processCancel(RequestEvent requestEvent,
            ServerTransaction serverTransactionId) {
        SipProvider sipProvider = (SipProviderrequestEvent.getSource();
        Request request = requestEvent.getRequest();
        try {
            ..println("shootme:  got a cancel.");
            if (serverTransactionId == null) {
                ..println("shootme:  null tid.");
                return;
            }
            Response response = .createResponse(200, request);
            serverTransactionId.sendResponse(response);
            if (.getState() != .) {
                response = .createResponse(
                        .);
                .sendResponse(response);
            }
        } catch (Exception ex) {
            ex.printStackTrace();
            System.exit(0);
        }
    }
    public void processTimeout(javax.sip.TimeoutEvent timeoutEvent) {
        Transaction transaction;
        if (timeoutEvent.isServerTransaction()) {
            transaction = timeoutEvent.getServerTransaction();
        } else {
            transaction = timeoutEvent.getClientTransaction();
        }
        ..println("state = " + transaction.getState());
        ..println("dialog = " + transaction.getDialog());
        ..println("dialogState = "
                + transaction.getDialog().getState());
        ..println("Transaction Time out");
    }
    public void init() {
        SipFactory sipFactory = null;
         = null;
        sipFactory = SipFactory.getInstance();
        sipFactory.setPathName("gov.nist");
        Properties properties = new Properties();
        properties.setProperty("javax.sip.STACK_NAME""shootme");
        // You need 16 for logging traces. 32 for debug + traces.
        // Your code will limp at 32 but it is best for debugging.
        properties.setProperty("gov.nist.javax.sip.TRACE_LEVEL""32");
        properties.setProperty("gov.nist.javax.sip.DEBUG_LOG",
                "shootmedebug.txt");
        properties.setProperty("gov.nist.javax.sip.SERVER_LOG",
                "shootmelog.txt");
        try {
            // Create SipStack object
             = sipFactory.createSipStack(properties);
            ..println("sipStack = " + );
        } catch (PeerUnavailableException e) {
            // could not find
            // gov.nist.jain.protocol.ip.sip.SipStackImpl
            // in the classpath
            e.printStackTrace();
            ..println(e.getMessage());
            if (e.getCause() != null)
                e.getCause().printStackTrace();
            System.exit(0);
        }
        try {
             = sipFactory.createHeaderFactory();
             = sipFactory.createAddressFactory();
             = sipFactory.createMessageFactory();
            ListeningPoint lp = .createListeningPoint("127.0.0.1",
                    5070, "udp");
            Shootme listener = this;
            SipProvider sipProvider = .createSipProvider(lp);
            ..println("udp provider " + sipProvider);
            sipProvider.addSipListener(listener);
        } catch (Exception ex) {
            ..println(ex.getMessage());
            ex.printStackTrace();
            usage();
        }
    }
    public static void main(String args[]) {
        new Shootme().init();
    }
    public void processIOException(IOExceptionEvent exceptionEvent) {
        ..println("IOException");
    }
    public void processTransactionTerminated(
            TransactionTerminatedEvent transactionTerminatedEvent) {
        ..println("Transaction terminated event recieved");
    }
    public void processDialogTerminated(
            DialogTerminatedEvent dialogTerminatedEvent) {
        ..println("Dialog terminated event recieved");
    }
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