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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 Shootist implements SipListener {
 
     private static SipProvider sipProvider;
 
     private static AddressFactory addressFactory;
 
     private static MessageFactory messageFactory;
 
     private static HeaderFactory headerFactory;
 
     private static SipStack sipStack;
 
     private ContactHeader contactHeader;
 
     private ListeningPoint udpListeningPoint;
 
     private ClientTransaction inviteTid;
 
     private Dialog dialog;
 
     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 requestReceivedEvent) {
         Request request = requestReceivedEvent.getRequest();
         ServerTransaction serverTransactionId = requestReceivedEvent
                 .getServerTransaction();
 
         ..println("\n\nRequest " + request.getMethod()
                 + " received at " + .getStackName()
                 + " with server transaction id " + serverTransactionId);
 
         // We are the UAC so the only request we get is the BYE.
         if (request.getMethod().equals(.))
             processBye(requestserverTransactionId);
 
     }
 
     public void processBye(Request request,
             ServerTransaction serverTransactionId) {
         try {
             ..println("shootist:  got a bye .");
             if (serverTransactionId == null) {
                 ..println("shootist:  null TID.");
                 return;
             }
             Dialog dialog = serverTransactionId.getDialog();
             ..println("Dialog State = " + dialog.getState());
             Response response = .createResponse(200, request);
             serverTransactionId.sendResponse(response);
             ..println("shootist:  Sending OK.");
             ..println("Dialog State = " + dialog.getState());
 
         } catch (Exception ex) {
             ex.printStackTrace();
             System.exit(0);
 
         }
     }
 
     public void processResponse(ResponseEvent responseReceivedEvent) {
         ..println("Got a response");
         Response response = (ResponseresponseReceivedEvent.getResponse();
         ClientTransaction tid = responseReceivedEvent.getClientTransaction();
         CSeqHeader cseq = (CSeqHeaderresponse.getHeader(.);
 
         ..println("Response received : Status Code = "
                 + response.getStatusCode() + " " + cseq);
         if (tid == null) {
             ..println("Stray response -- dropping ");
             return;
         }
         ..println("transaction state is " + tid.getState());
         ..println("Dialog = " + tid.getDialog());
         ..println("Dialog State is " + tid.getDialog().getState());
         SipProvider provider = (SipProviderresponseReceivedEvent.getSource();
 
        try {
            if (response.getStatusCode() == .) {
                if (cseq.getMethod().equals(.)) {
                    Request ackRequest = .createAckcseq.getSeqNumber() );
                    ..println("Sending ACK");
                    .sendAck(ackRequest);
                } else if (cseq.getMethod().equals(.)) {
                    if (.getState() == .) {
                        // oops cancel went in too late. Need to hang up the
                        // dialog.
                        .
                                .println("Sending BYE -- cancel went in too late !!");
                        Request byeRequest = .createRequest(.);
                        ClientTransaction ct = 
                                .getNewClientTransaction(byeRequest);
                        .sendRequest(ct);
                    }
                }
            } else if ( response.getStatusCode() == 183) {
                RequireHeader requireHeader = (RequireHeaderresponse.getHeader(.);
                if ( requireHeader.getOptionTag().equalsIgnoreCase("100rel")) {
                    Dialog dialog = tid.getDialog();
                    Request prackRequest = dialog.createPrack(response);
                    ClientTransaction ct = provider.getNewClientTransaction(prackRequest);
                    dialog.sendRequest(ct);
                }
            }
        } catch (Exception ex) {
            ex.printStackTrace();
            System.exit(0);
        }
    }
    public void processTimeout(javax.sip.TimeoutEvent timeoutEvent) {
        ..println("Transaction Time out");
    }
    public void sendCancel() {
        try {
            ..println("Sending cancel");
            Request cancelRequest = .createCancel();
            ClientTransaction cancelTid = 
                    .getNewClientTransaction(cancelRequest);
            cancelTid.sendRequest();
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
    public void init() {
        SipFactory sipFactory = null;
         = null;
        sipFactory = SipFactory.getInstance();
        sipFactory.setPathName("gov.nist");
        Properties properties = new Properties();
        // If you want to try TCP transport change the following to
        String transport = "udp";
        String peerHostPort = "127.0.0.1:5070";
        properties.setProperty("javax.sip.OUTBOUND_PROXY"peerHostPort + "/"
                + transport);
        // If you want to use UDP then uncomment this.
        properties.setProperty("javax.sip.STACK_NAME""shootist");
        // The following properties are specific to nist-sip
        // and are not necessarily part of any other jain-sip
        // implementation.
        // You can set a max message size for tcp transport to
        // guard against denial of service attack.
        properties.setProperty("gov.nist.javax.sip.DEBUG_LOG",
                "shootistdebug.txt");
        properties.setProperty("gov.nist.javax.sip.SERVER_LOG",
                "shootistlog.txt");
        // Set to 0 in your production code for max speed.
        // 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");
        try {
            // Create SipStack object
             = sipFactory.createSipStack(properties);
            ..println("createSipStack " + );
        } catch (PeerUnavailableException e) {
            // could not find
            // gov.nist.jain.protocol.ip.sip.SipStackImpl
            // in the classpath
            e.printStackTrace();
            ..println(e.getMessage());
            System.exit(0);
        }
        try {
             = sipFactory.createHeaderFactory();
             = sipFactory.createAddressFactory();
             = sipFactory.createMessageFactory();
             = .createListeningPoint("127.0.0.1",
                    5060, "udp");
            Shootist listener = this;
            .addSipListener(listener);
            String fromName = "BigGuy";
            String fromSipAddress = "here.com";
            String fromDisplayName = "The Master Blaster";
            String toSipAddress = "there.com";
            String toUser = "LittleGuy";
            String toDisplayName = "The Little Blister";
            // create >From Header
            SipURI fromAddress = .createSipURI(fromName,
                    fromSipAddress);
            Address fromNameAddress = .createAddress(fromAddress);
            fromNameAddress.setDisplayName(fromDisplayName);
            FromHeader fromHeader = .createFromHeader(
                    fromNameAddress"12345");
            // create To Header
            SipURI toAddress = 
                    .createSipURI(toUsertoSipAddress);
            Address toNameAddress = .createAddress(toAddress);
            toNameAddress.setDisplayName(toDisplayName);
            ToHeader toHeader = .createToHeader(toNameAddress,
                    null);
            // create Request URI
            SipURI requestURI = .createSipURI(toUser,
                    peerHostPort);
            // Create ViaHeaders
            ArrayList viaHeaders = new ArrayList();
            ViaHeader viaHeader = .createViaHeader("127.0.0.1",
                    .getListeningPoint(transport).getPort(),
                    transportnull);
            // add via headers
            viaHeaders.add(viaHeader);
            // Create ContentTypeHeader
            ContentTypeHeader contentTypeHeader = 
                    .createContentTypeHeader("application""sdp");
            // Create a new CallId header
            CallIdHeader callIdHeader = .getNewCallId();
            // Create a new Cseq header
            CSeqHeader cSeqHeader = .createCSeqHeader(1L,
                    .);
            // Create a new MaxForwardsHeader
            MaxForwardsHeader maxForwards = 
                    .createMaxForwardsHeader(70);
            // Create the request.
            Request request = .createRequest(requestURI,
                    .callIdHeadercSeqHeaderfromHeader,
                    toHeaderviaHeadersmaxForwards);
            // Create contact headers
            String host = "127.0.0.1";
            SipURI contactUrl = .createSipURI(fromNamehost);
            contactUrl.setPort(.getPort());
            // Create the contact name address.
            SipURI contactURI = .createSipURI(fromNamehost);
            contactURI.setPort(.getListeningPoint(transport)
                    .getPort());
            Address contactAddress = .createAddress(contactURI);
            // Add the contact address.
            contactAddress.setDisplayName(fromName);
             = .createContactHeader(contactAddress);
            request.addHeader();
            /*
             * When the UAC creates a new request, it can insist on reliable
             * delivery of provisional responses for that request. To do that,
             * it inserts a Require header field with the option tag 100rel into
             * the request.
             */
            RequireHeader requireHeader = 
                    .createRequireHeader("100rel");
            request.addHeader(requireHeader);
            // Create the client transaction.
             = .getNewClientTransaction(request);
            // send the request out.
            .sendRequest();
             = .getDialog();
        } catch (Exception ex) {
            ..println(ex.getMessage());
            ex.printStackTrace();
            usage();
        }
    }
    public static void main(String args[]) {
        new Shootist().init();
    }
    public void processIOException(IOExceptionEvent exceptionEvent) {
        ..println("IOException happened for "
                + exceptionEvent.getHost() + " port = "
                + exceptionEvent.getPort());
    }
    public void processTransactionTerminated(
            TransactionTerminatedEvent transactionTerminatedEvent) {
        ..println("Transaction terminated event recieved");
    }
    public void processDialogTerminated(
            DialogTerminatedEvent dialogTerminatedEvent) {
        ..println("dialogTerminatedEvent");
    }
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