package examples.websocket;
import javax.sip.*;
import javax.sip.address.*;
import javax.sip.header.*;
import javax.sip.message.*;
import org.apache.log4j.ConsoleAppender;
import org.apache.log4j.Level;
import org.apache.log4j.Logger;
import org.apache.log4j.PatternLayout;
import examples.simplecallsetup.Shootist;
import gov.nist.javax.sip.stack.NioMessageProcessorFactory;
import java.text.ParseException;
import java.util.*;
import java.util.concurrent.atomic.AtomicLong;
/**
* This class is a B2BUA using Websocket transport. You can use any two Websocket SIP phones
* to register into the server and call each other by the username the advertised in the REGISTER
* request. The registrar is just storing the contacts of the users in a HashMap locally.
*
* Requiring registration is the only significant difference from the usual JAIN-SIP call flow. The
* registrations are required because a phone must be able to receive calls on the websocket while
* being idle otherwise.
*
* @author Vladimir Ralev
*/
public class B2BUA 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 = 5082;
private AtomicLong counter = new AtomicLong();
private ListeningPoint listeningPoint;
private SipProvider sipProvider;
private String transport = "ws";
private HashMap<String, SipURI> registrar = new HashMap<String, SipURI>();
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.CANCEL)) {
processCancel(requestEvent, serverTransactionId);
} else if (request.getMethod().equals(Request.REGISTER)) {
processRegister(requestEvent, serverTransactionId);
} else {
processInDialogRequest(requestEvent, serverTransactionId);
}
}
public void processResponse(ResponseEvent responseEvent) {
ClientTransaction ct = responseEvent.getClientTransaction();
Response response = responseEvent.getResponse();
ServerTransaction st = (ServerTransaction) ct.getApplicationData();
try {
Response otherResponse = messageFactory.createResponse(response.getStatusCode(), st.getRequest());
if(response.getStatusCode() == 200 && ct.getRequest().getMethod().equals("INVITE")) {
Address address = addressFactory.createAddress("B2BUA <sip:"
+ myAddress + ":" + myPort + ">");
ContactHeader contactHeader = headerFactory
.createContactHeader(address);
response.addHeader(contactHeader);
ToHeader toHeader = (ToHeader) otherResponse.getHeader(ToHeader.NAME);
if(toHeader.getTag() == null) toHeader.setTag(new Long(counter.getAndIncrement()).toString());
otherResponse.addHeader(contactHeader);
}
st.sendResponse(otherResponse);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* Process the ACK request, forward it to the other leg.
*/
public void processAck(RequestEvent requestEvent,
ServerTransaction serverTransaction) {
try {
Dialog dialog = serverTransaction.getDialog();
System.out.println("b2bua: got an ACK! ");
System.out.println("Dialog State = " + dialog.getState());
Dialog otherDialog = (Dialog) dialog.getApplicationData();
Request request = otherDialog.createAck(otherDialog.getLocalSeqNumber());
otherDialog.sendAck(request);
} 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("b2bua: got an Invite sending Trying");
ServerTransaction st = requestEvent.getServerTransaction();
if(st == null) {
st = sipProvider.getNewServerTransaction(request);
}
Dialog dialog = st.getDialog();
ToHeader to = (ToHeader) request.getHeader(ToHeader.NAME);
SipURI toUri = (SipURI) to.getAddress().getURI();
SipURI target = registrar.get(toUri.getUser());
if(target == null) {
System.out.println("User " + toUri + " is not registered.");
throw new RuntimeException("User not registered " + toUri);
} else {
ClientTransaction otherLeg = call(target);
otherLeg.setApplicationData(st);
st.setApplicationData(otherLeg);
dialog.setApplicationData(otherLeg.getDialog());
otherLeg.getDialog().setApplicationData(dialog);
}
} catch (Exception ex) {
ex.printStackTrace();
System.exit(0);
}
}
/**
* Process the any in dialog request - MESSAGE, BYE, INFO, UPDATE.
*/
public void processInDialogRequest(RequestEvent requestEvent,
ServerTransaction serverTransactionId) {
SipProvider sipProvider = (SipProvider) requestEvent.getSource();
Request request = requestEvent.getRequest();
Dialog dialog = requestEvent.getDialog();
System.out.println("local party = " + dialog.getLocalParty());
try {
System.out.println("b2bua: got a bye sending OK.");
Response response = messageFactory.createResponse(200, request);
serverTransactionId.sendResponse(response);
System.out.println("Dialog State is "
+ serverTransactionId.getDialog().getState());
Dialog otherLeg = (Dialog) dialog.getApplicationData();
Request otherBye = otherLeg.createRequest(request.getMethod());
ClientTransaction clientTransaction = sipProvider.getNewClientTransaction(otherBye);
clientTransaction.setApplicationData(serverTransactionId);
serverTransactionId.setApplicationData(clientTransaction);
otherLeg.sendRequest(clientTransaction);
} catch (Exception ex) {
ex.printStackTrace();
System.exit(0);
}
}
public void processRegister(RequestEvent requestEvent,
ServerTransaction serverTransactionId) {
Request request = requestEvent.getRequest();
ContactHeader contact = (ContactHeader) request.getHeader(ContactHeader.NAME);
SipURI contactUri = (SipURI) contact.getAddress().getURI();
FromHeader from = (FromHeader) request.getHeader(FromHeader.NAME);
SipURI fromUri = (SipURI) from.getAddress().getURI();
registrar.put(fromUri.getUser(), contactUri);
try {
Response response = this.messageFactory.createResponse(200, request);
ServerTransaction serverTransaction = sipProvider.getNewServerTransaction(request);
serverTransaction.sendResponse(response);
} catch (Exception e) {
e.printStackTrace();
}
}
public void processCancel(RequestEvent requestEvent,
ServerTransaction serverTransactionId) {}
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() {
ConsoleAppender console = new ConsoleAppender(); //create appender
//configure the appender
String PATTERN = "%d [%p|%c|%C{1}] %m%n";
console.setLayout(new PatternLayout(PATTERN));
console.setThreshold(Level.DEBUG);
console.activateOptions();
//add appender to any Logger (here is root)
Logger.getRootLogger().addAppender(console);
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", "LOG4J");
properties.setProperty("gov.nist.javax.sip.DEBUG_LOG",
"shootmedebug.txt");
properties.setProperty("gov.nist.javax.sip.SERVER_LOG",
"shootmelog.txt");
properties.setProperty("gov.nist.javax.sip.MESSAGE_PROCESSOR_FACTORY", NioMessageProcessorFactory.class.getName());
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();
this.listeningPoint = sipStack.createListeningPoint("127.0.0.1",
myPort, transport);
B2BUA listener = this;
sipProvider = sipStack.createSipProvider(listeningPoint);
System.out.println("ws provider " + sipProvider);
sipProvider.addSipListener(listener);
} catch (Exception ex) {
System.out.println(ex.getMessage());
ex.printStackTrace();
}
}
public static void main(String args[]) {
new B2BUA().init();
}
public void processIOException(IOExceptionEvent exceptionEvent) {
System.out.println("IOException");
}
public void processTransactionTerminated(
TransactionTerminatedEvent transactionTerminatedEvent) {
if (transactionTerminatedEvent.isServerTransaction())
System.out.println("Transaction terminated event recieved"
+ transactionTerminatedEvent.getServerTransaction());
else
System.out.println("Transaction terminated "
+ transactionTerminatedEvent.getClientTransaction());
}
public void processDialogTerminated(
DialogTerminatedEvent dialogTerminatedEvent) {
System.out.println("Dialog terminated event recieved");
Dialog d = dialogTerminatedEvent.getDialog();
System.out.println("Local Party = " + d.getLocalParty());
}
public ClientTransaction call(SipURI destination) {
try {
String fromName = "B2BUA";
String fromSipAddress = "here.com";
String fromDisplayName = "B2BUA";
String toSipAddress = "there.com";
String toUser = "Target";
String toDisplayName = "Target";
// create >From Header
SipURI fromAddress = addressFactory.createSipURI(fromName,
fromSipAddress);
Address fromNameAddress = addressFactory.createAddress(fromAddress);
fromNameAddress.setDisplayName(fromDisplayName);
FromHeader fromHeader = headerFactory.createFromHeader(
fromNameAddress, new Long(counter.getAndIncrement()).toString());
// 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 = destination;
// Create ViaHeaders
ArrayList viaHeaders = new ArrayList();
String ipAddress = listeningPoint.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(listeningPoint.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 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",
"<http://www.antd.nist.gov>");
request.addHeader(callInfoHeader);
// Create the client transaction.
ClientTransaction inviteTid = sipProvider.getNewClientTransaction(request);
System.out.println("inviteTid = " + inviteTid);
// send the request out.
inviteTid.sendRequest();
return inviteTid;
} catch (Exception ex) {
System.out.println(ex.getMessage());
ex.printStackTrace();
}
return null;
}
}