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package examples.android.simplecallsetup;

import android.javax.sip.*;
import android.javax.sip.address.*;
import android.javax.sip.header.*;
import android.javax.sip.message.*;

import java.text.ParseException;
import java.util.*;

/**
 * This class is a UAC template for android JSIP stack
 *
 * @author 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;

    private boolean byeTaskRunning;

    class ByeTask  extends TimerTask {
        Dialog dialog;
        public ByeTask(Dialog dialog)  {
            this.dialog = dialog;
        }
        public void run () {
            try {
               Request byeRequest = this.dialog.createRequest(Request.BYE);
               ClientTransaction ct = sipProvider.getNewClientTransaction(byeRequest);
               dialog.sendRequest(ct);
            } catch (Exception ex) {
                ex.printStackTrace();
                System.exit(0);
            }

        }
    }

    private static final String usageString = "java "
            + "examples.shootist.Shootist \n"
            + ">>>> is your class path set to the root?";

    private static void usage() {
        System.out.println(usageString);
        System.exit(0);

    }


    public void processRequest(RequestEvent requestReceivedEvent) {
        Request request = requestReceivedEvent.getRequest();
        ServerTransaction serverTransactionId = requestReceivedEvent
                .getServerTransaction();

        System.out.println("\n\nRequest " + request.getMethod()
                + " received at " + sipStack.getStackName()
                + " with server transaction id " + serverTransactionId);

        // We are the UAC so the only request we get is the BYE.
        if (request.getMethod().equals(Request.BYE))
            processBye(request, serverTransactionId);
        else {
            try {
                serverTransactionId.sendResponse( messageFactory.createResponse(202,request) );
            } catch (SipException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (InvalidArgumentException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (ParseException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }

    }

    public void processBye(Request request,
            ServerTransaction serverTransactionId) {
        try {
            System.out.println("shootist:  got a bye .");
            if (serverTransactionId == null) {
                System.out.println("shootist:  null TID.");
                return;
            }
            Dialog dialog = serverTransactionId.getDialog();
            System.out.println("Dialog State = " + dialog.getState());
            Response response = messageFactory.createResponse(200, request);
            serverTransactionId.sendResponse(response);
            System.out.println("shootist:  Sending OK.");
            System.out.println("Dialog State = " + dialog.getState());

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

        }
    }

       // Save the created ACK request, to respond to retransmitted 2xx
       private Request ackRequest;

    public void processResponse(ResponseEvent responseReceivedEvent) {
        System.out.println("Got a response");
        Response response = (Response) responseReceivedEvent.getResponse();
        ClientTransaction tid = responseReceivedEvent.getClientTransaction();
        CSeqHeader cseq = (CSeqHeader) response.getHeader(CSeqHeader.NAME);

        System.out.println("Response received : Status Code = "
                + response.getStatusCode() + " " + cseq);


        if (tid == null) {

            // RFC3261: MUST respond to every 2xx
            if (ackRequest!=null && dialog!=null) {
               System.out.println("re-sending ACK");
               try {
                  dialog.sendAck(ackRequest);
               } catch (SipException se) {
                  se.printStackTrace();
               }
            }
            return;
        }
        // If the caller is supposed to send the bye
        if ( examples.simplecallsetup.Shootme.callerSendsBye && !byeTaskRunning) {
            byeTaskRunning = true;
            new Timer().schedule(new ByeTask(dialog), 4000) ;
        }
        System.out.println("transaction state is " + tid.getState());
        System.out.println("Dialog = " + tid.getDialog());
        System.out.println("Dialog State is " + tid.getDialog().getState());

        try {
            if (response.getStatusCode() == Response.OK) {
                if (cseq.getMethod().equals(Request.INVITE)) {
                    System.out.println("Dialog after 200 OK  " + dialog);
                    System.out.println("Dialog State after 200 OK  " + dialog.getState());
                    ackRequest = dialog.createAck( ((CSeqHeader) response.getHeader(CSeqHeader.NAME)).getSeqNumber() );
                    System.out.println("Sending ACK");
                    dialog.sendAck(ackRequest);

                    // JvB: test REFER, reported bug in tag handling
                    // dialog.sendRequest(  sipProvider.getNewClientTransaction( dialog.createRequest("REFER") ));

                } else if (cseq.getMethod().equals(Request.CANCEL)) {
                    if (dialog.getState() == DialogState.CONFIRMED) {
                        // oops cancel went in too late. Need to hang up the
                        // dialog.
                        System.out
                                .println("Sending BYE -- cancel went in too late !!");
                        Request byeRequest = dialog.createRequest(Request.BYE);
                        ClientTransaction ct = sipProvider
                                .getNewClientTransaction(byeRequest);
                        dialog.sendRequest(ct);

                    }

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

    }


    public void sendCancel() {
        try {
            System.out.println("Sending cancel");
            Request cancelRequest = inviteTid.createCancel();
            ClientTransaction cancelTid = sipProvider
                    .getNewClientTransaction(cancelRequest);
            cancelTid.sendRequest();
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    public void init() {
        SipFactory sipFactory = null;
        sipStack = null;
        sipFactory = SipFactory.getInstance();
        sipFactory.setPathName("android.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";
        // String peerHostPort = "230.0.0.1:5070";
        properties.setProperty("android.javax.sip.OUTBOUND_PROXY", peerHostPort + "/"
                + transport);
        // If you want to use UDP then uncomment this.
        properties.setProperty("android.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");

        // Drop the client connection after we are done with the transaction.
        properties.setProperty("gov.nist.javax.sip.CACHE_CLIENT_CONNECTIONS",
                "false");
        // Set to 0 (or NONE) in your production code for max speed.
        // You need 16 (or TRACE) for logging traces. 32 (or DEBUG) for debug + traces.
        // Your code will limp at 32 but it is best for debugging.
        properties.setProperty("gov.nist.javax.sip.TRACE_LEVEL", "DEBUG");

        try {
            // Create SipStack object
            sipStack = sipFactory.createSipStack(properties);
            System.out.println("createSipStack " + sipStack);
        } catch (PeerUnavailableException e) {
            // could not find
            // gov.nist.jain.protocol.ip.sip.SipStackImpl
            // in the classpath
            e.printStackTrace();
            System.err.println(e.getMessage());
            System.exit(0);
        }

        try {
            headerFactory = sipFactory.createHeaderFactory();
            addressFactory = sipFactory.createAddressFactory();
            messageFactory = sipFactory.createMessageFactory();
            udpListeningPoint = sipStack.createListeningPoint("127.0.0.1", 5060, transport);
            System.out.println("listeningPoint = " + udpListeningPoint);
            sipProvider = sipStack.createSipProvider(udpListeningPoint);
            System.out.println("SipProvider = " + sipProvider);
            Shootist listener = this;
            sipProvider.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 = addressFactory.createSipURI(fromName,
                    fromSipAddress);

            Address fromNameAddress = addressFactory.createAddress(fromAddress);
            fromNameAddress.setDisplayName(fromDisplayName);
            FromHeader fromHeader = headerFactory.createFromHeader(
                    fromNameAddress, "12345");

            // create To Header
            SipURI toAddress = addressFactory
                    .createSipURI(toUser, toSipAddress);
            Address toNameAddress = addressFactory.createAddress(toAddress);
            toNameAddress.setDisplayName(toDisplayName);
            ToHeader toHeader = headerFactory.createToHeader(toNameAddress,
                    null);

            // create Request URI
            SipURI requestURI = addressFactory.createSipURI(toUser,
                    peerHostPort);

            // Create ViaHeaders

            ArrayList viaHeaders = new ArrayList();
            String ipAddress = udpListeningPoint.getIPAddress();
            ViaHeader viaHeader = headerFactory.createViaHeader(ipAddress,
                    sipProvider.getListeningPoint(transport).getPort(),
                    transport, null);

            // add via headers
            viaHeaders.add(viaHeader);

            // Create ContentTypeHeader
            ContentTypeHeader contentTypeHeader = headerFactory
                    .createContentTypeHeader("application", "sdp");

            // Create a new CallId header
            CallIdHeader callIdHeader = sipProvider.getNewCallId();

            // Create a new Cseq header
            CSeqHeader cSeqHeader = headerFactory.createCSeqHeader(1L,
                    Request.INVITE);

            // Create a new MaxForwardsHeader
            MaxForwardsHeader maxForwards = headerFactory
                    .createMaxForwardsHeader(70);

            // Create the request.
            Request request = messageFactory.createRequest(requestURI,
                    Request.INVITE, callIdHeader, cSeqHeader, fromHeader,
                    toHeader, viaHeaders, maxForwards);
            // Create contact headers
            String host = "127.0.0.1";

            SipURI contactUrl = addressFactory.createSipURI(fromName, host);
            contactUrl.setPort(udpListeningPoint.getPort());
            contactUrl.setLrParam();

            // Create the contact name address.
            SipURI contactURI = addressFactory.createSipURI(fromName, host);
            contactURI.setPort(sipProvider.getListeningPoint(transport)
                    .getPort());

            Address contactAddress = addressFactory.createAddress(contactURI);

            // Add the contact address.
            contactAddress.setDisplayName(fromName);

            contactHeader = headerFactory.createContactHeader(contactAddress);
            request.addHeader(contactHeader);

            // You can add extension headers of your own making
            // to the outgoing SIP request.
            // Add the extension header.
            Header extensionHeader = headerFactory.createHeader("My-Header",
                    "my header value");
            request.addHeader(extensionHeader);

            String sdpData = "v=0\r\n"
                    + "o=4855 13760799956958020 13760799956958020"
                    + " IN IP4  129.6.55.78\r\n" + "s=mysession session\r\n"
                    + "p=+46 8 52018010\r\n" + "c=IN IP4  129.6.55.78\r\n"
                    + "t=0 0\r\n" + "m=audio 6022 RTP/AVP 0 4 18\r\n"
                    + "a=rtpmap:0 PCMU/8000\r\n" + "a=rtpmap:4 G723/8000\r\n"
                    + "a=rtpmap:18 G729A/8000\r\n" + "a=ptime:20\r\n";
            byte[] contents = sdpData.getBytes();

            request.setContent(contents, contentTypeHeader);
            // You can add as many extension headers as you
            // want.

            extensionHeader = headerFactory.createHeader("My-Other-Header",
                    "my new header value ");
            request.addHeader(extensionHeader);

            Header callInfoHeader = headerFactory.createHeader("Call-Info",
                    "");
            request.addHeader(callInfoHeader);

            // Create the client transaction.
            inviteTid = sipProvider.getNewClientTransaction(request);
         
            System.out.println("inviteTid = " + inviteTid);

            // send the request out.
            
            inviteTid.sendRequest();

            dialog = inviteTid.getDialog();

        } catch (Exception ex) {
            System.out.println(ex.getMessage());
            ex.printStackTrace();
            usage();
        }
    }

    public static void main(String args[]) {
        new Shootist().init();

    }

    public void processIOException(IOExceptionEvent exceptionEvent) {
        System.out.println("IOException happened for "
                + exceptionEvent.getHost() + " port = "
                + exceptionEvent.getPort());

    }

    public void processTransactionTerminated(
            TransactionTerminatedEvent transactionTerminatedEvent) {
        System.out.println("Transaction terminated event recieved");
    }

    public void processDialogTerminated(
            DialogTerminatedEvent dialogTerminatedEvent) {
        System.out.println("dialogTerminatedEvent");

    }


	@Override
	public void processTimeout(TimeoutEvent timeoutEvent) {
		// TODO Auto-generated method stub
		
	}
}




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