package examples.prack;
import javax.sip.*;
import javax.sip.address.*;
import javax.sip.header.*;
import javax.sip.message.*;
import java.util.*;
/**
* This class is a UAC template. Shootist is the guy that shoots and shootme is
* the guy that gets shot.
*
* @author 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() {
System.out.println(usageString);
System.exit(0);
}
public void processRequest(RequestEvent requestEvent) {
Request request = requestEvent.getRequest();
ServerTransaction serverTransactionId = requestEvent
.getServerTransaction();
System.out.println("\n\nRequest " + request.getMethod()
+ " received at " + sipStack.getStackName()
+ " with server transaction id " + serverTransactionId);
if (request.getMethod().equals(Request.INVITE)) {
processInvite(requestEvent, serverTransactionId);
} else if (request.getMethod().equals(Request.ACK)) {
processAck(requestEvent, serverTransactionId);
} else if (request.getMethod().equals(Request.BYE)) {
processBye(requestEvent, serverTransactionId);
} else if (request.getMethod().equals(Request.CANCEL)) {
processCancel(requestEvent, serverTransactionId);
} else if (request.getMethod().equals(Request.PRACK)) {
processPrack(requestEvent, serverTransactionId);
}
}
private void processPrack(RequestEvent requestEvent,
ServerTransaction serverTransactionId) {
try {
System.out.println("shootme: got an PRACK! ");
System.out.println("Dialog State = " + dialog.getState());
/**
* JvB: First, send 200 OK for PRACK
*/
Request prack = requestEvent.getRequest();
Response prackOk = messageFactory.createResponse( 200, prack );
serverTransactionId.sendResponse( prackOk );
/**
* Send a 200 OK response to complete the 3 way handshake for the
* INIVTE.
*/
Response response = messageFactory.createResponse(200,
inviteRequest);
ToHeader to = (ToHeader) response.getHeader(ToHeader.NAME);
to.setTag(this.toTag);
Address address = addressFactory.createAddress("Shootme <sip:"
+ myAddress + ":" + myPort + ">");
ContactHeader contactHeader = headerFactory
.createContactHeader(address);
response.addHeader(contactHeader);
inviteTid.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 {
System.out.println("shootme: got an ACK! Sending a BYE");
System.out.println("Dialog State = " + dialog.getState());
Dialog dialog = serverTransaction.getDialog();
SipProvider provider = (SipProvider) requestEvent.getSource();
Request byeRequest = dialog.createRequest(Request.BYE);
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 = (SipProvider) requestEvent.getSource();
Request request = requestEvent.getRequest();
try {
System.out.println("shootme: got an Invite sending Trying");
// System.out.println("shootme: " + request);
Response response = messageFactory.createResponse(Response.TRYING,
request);
ServerTransaction st = requestEvent.getServerTransaction();
if (st == null) {
st = sipProvider.getNewServerTransaction(request);
}
dialog = st.getDialog();
st.sendResponse(response);
// reliable provisional response. Use the API here!
// Response okResponse = messageFactory.createResponse(183, request);
Response sessionProgress = dialog.createReliableProvisionalResponse(
Response.SESSION_PROGRESS );
ToHeader toHeader = (ToHeader) sessionProgress.getHeader(ToHeader.NAME);
this.toTag = "4321";
toHeader.setTag(toTag); // Application is supposed to set.
this.inviteTid = st;
this.inviteRequest = request;
System.out.println("sending reliable provisional response.");
// It is essential to use this API here!
dialog.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 = (SipProvider) requestEvent.getSource();
Request request = requestEvent.getRequest();
try {
System.out.println("shootme: got a bye sending OK.");
Response response = messageFactory.createResponse(200, request);
serverTransactionId.sendResponse(response);
System.out.println("Dialog State is "
+ serverTransactionId.getDialog().getState());
} catch (Exception ex) {
ex.printStackTrace();
System.exit(0);
}
}
public void processCancel(RequestEvent requestEvent,
ServerTransaction serverTransactionId) {
SipProvider sipProvider = (SipProvider) requestEvent.getSource();
Request request = requestEvent.getRequest();
try {
System.out.println("shootme: got a cancel.");
if (serverTransactionId == null) {
System.out.println("shootme: null tid.");
return;
}
Response response = messageFactory.createResponse(200, request);
serverTransactionId.sendResponse(response);
if (dialog.getState() != DialogState.CONFIRMED) {
response = messageFactory.createResponse(
Response.REQUEST_TERMINATED, inviteRequest);
inviteTid.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();
}
System.out.println("state = " + transaction.getState());
System.out.println("dialog = " + transaction.getDialog());
System.out.println("dialogState = "
+ transaction.getDialog().getState());
System.out.println("Transaction Time out");
}
public void init() {
SipFactory sipFactory = null;
sipStack = 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
sipStack = sipFactory.createSipStack(properties);
System.out.println("sipStack = " + sipStack);
} catch (PeerUnavailableException e) {
// could not find
// gov.nist.jain.protocol.ip.sip.SipStackImpl
// in the classpath
e.printStackTrace();
System.err.println(e.getMessage());
if (e.getCause() != null)
e.getCause().printStackTrace();
System.exit(0);
}
try {
headerFactory = sipFactory.createHeaderFactory();
addressFactory = sipFactory.createAddressFactory();
messageFactory = sipFactory.createMessageFactory();
ListeningPoint lp = sipStack.createListeningPoint("127.0.0.1",
5070, "udp");
Shootme listener = this;
SipProvider sipProvider = sipStack.createSipProvider(lp);
System.out.println("udp provider " + sipProvider);
sipProvider.addSipListener(listener);
} catch (Exception ex) {
System.out.println(ex.getMessage());
ex.printStackTrace();
usage();
}
}
public static void main(String args[]) {
new Shootme().init();
}
public void processIOException(IOExceptionEvent exceptionEvent) {
System.out.println("IOException");
}
public void processTransactionTerminated(
TransactionTerminatedEvent transactionTerminatedEvent) {
System.out.println("Transaction terminated event recieved");
}
public void processDialogTerminated(
DialogTerminatedEvent dialogTerminatedEvent) {
System.out.println("Dialog terminated event recieved");
}
}