use of gov.nist.javax.sip.stack.SIPDialog in project XobotOS by xamarin.
the class SipProviderImpl method getNewClientTransaction.
/*
* (non-Javadoc)
*
* @see javax.sip.SipProvider#getNewClientTransaction(javax.sip.message.Request)
*/
public ClientTransaction getNewClientTransaction(Request request) throws TransactionUnavailableException {
if (request == null)
throw new NullPointerException("null request");
if (!sipStack.isAlive())
throw new TransactionUnavailableException("Stack is stopped");
SIPRequest sipRequest = (SIPRequest) request;
if (sipRequest.getTransaction() != null)
throw new TransactionUnavailableException("Transaction already assigned to request");
if (sipRequest.getMethod().equals(Request.ACK)) {
throw new TransactionUnavailableException("Cannot create client transaction for " + Request.ACK);
}
// sloppy
if (sipRequest.getTopmostVia() == null) {
ListeningPointImpl lp = (ListeningPointImpl) this.getListeningPoint("udp");
Via via = lp.getViaHeader();
request.setHeader(via);
}
// Give the request a quick check to see if all headers are assigned.
try {
sipRequest.checkHeaders();
} catch (ParseException ex) {
throw new TransactionUnavailableException(ex.getMessage(), ex);
}
/*
* User decided to give us his own via header branch. Lets see if it
* results in a clash. If so reject the request.
*/
if (sipRequest.getTopmostVia().getBranch() != null && sipRequest.getTopmostVia().getBranch().startsWith(SIPConstants.BRANCH_MAGIC_COOKIE) && sipStack.findTransaction((SIPRequest) request, false) != null) {
throw new TransactionUnavailableException("Transaction already exists!");
}
if (request.getMethod().equalsIgnoreCase(Request.CANCEL)) {
SIPClientTransaction ct = (SIPClientTransaction) sipStack.findCancelTransaction((SIPRequest) request, false);
if (ct != null) {
ClientTransaction retval = sipStack.createClientTransaction((SIPRequest) request, ct.getMessageChannel());
((SIPTransaction) retval).addEventListener(this);
sipStack.addTransaction((SIPClientTransaction) retval);
if (ct.getDialog() != null) {
((SIPClientTransaction) retval).setDialog((SIPDialog) ct.getDialog(), sipRequest.getDialogId(false));
}
return retval;
}
}
if (sipStack.isLoggingEnabled())
sipStack.getStackLogger().logDebug("could not find existing transaction for " + ((SIPRequest) request).getFirstLine() + " creating a new one ");
// Could not find a dialog or the route is not set in dialog.
Hop hop = null;
try {
hop = sipStack.getNextHop((SIPRequest) request);
if (hop == null)
throw new TransactionUnavailableException("Cannot resolve next hop -- transaction unavailable");
} catch (SipException ex) {
throw new TransactionUnavailableException("Cannot resolve next hop -- transaction unavailable", ex);
}
String transport = hop.getTransport();
ListeningPointImpl listeningPoint = (ListeningPointImpl) this.getListeningPoint(transport);
String dialogId = sipRequest.getDialogId(false);
SIPDialog dialog = sipStack.getDialog(dialogId);
if (dialog != null && dialog.getState() == DialogState.TERMINATED) {
// throw new TransactionUnavailableException
// ("Found a terminated dialog -- possible re-use of old tag
// parameters");
sipStack.removeDialog(dialog);
}
try {
// Set the brannch id before you ask for a tx.
// If the user has set his own branch Id and the
// branch id starts with a valid prefix, then take it.
// otherwise, generate one. If branch ID checking has
// been requested, set the branch ID.
String branchId = null;
if (sipRequest.getTopmostVia().getBranch() == null || !sipRequest.getTopmostVia().getBranch().startsWith(SIPConstants.BRANCH_MAGIC_COOKIE) || sipStack.checkBranchId()) {
branchId = Utils.getInstance().generateBranchId();
sipRequest.getTopmostVia().setBranch(branchId);
}
Via topmostVia = sipRequest.getTopmostVia();
//set port and transport if user hasn't already done this.
if (topmostVia.getTransport() == null)
topmostVia.setTransport(transport);
if (topmostVia.getPort() == -1)
topmostVia.setPort(listeningPoint.getPort());
branchId = sipRequest.getTopmostVia().getBranch();
SIPClientTransaction ct = (SIPClientTransaction) sipStack.createMessageChannel(sipRequest, listeningPoint.getMessageProcessor(), hop);
if (ct == null)
throw new TransactionUnavailableException("Cound not create tx");
ct.setNextHop(hop);
ct.setOriginalRequest(sipRequest);
ct.setBranch(branchId);
// if the stack supports dialogs then
if (sipStack.isDialogCreated(request.getMethod())) {
// (but noticed by Brad Templeton)
if (dialog != null)
ct.setDialog(dialog, sipRequest.getDialogId(false));
else if (this.isAutomaticDialogSupportEnabled()) {
SIPDialog sipDialog = sipStack.createDialog(ct);
ct.setDialog(sipDialog, sipRequest.getDialogId(false));
}
} else {
if (dialog != null) {
ct.setDialog(dialog, sipRequest.getDialogId(false));
}
}
// The provider is the event listener for all transactions.
ct.addEventListener(this);
return (ClientTransaction) ct;
} catch (IOException ex) {
throw new TransactionUnavailableException("Could not resolve next hop or listening point unavailable! ", ex);
} catch (java.text.ParseException ex) {
InternalErrorHandler.handleException(ex);
throw new TransactionUnavailableException("Unexpected Exception FIXME! ", ex);
} catch (InvalidArgumentException ex) {
InternalErrorHandler.handleException(ex);
throw new TransactionUnavailableException("Unexpected Exception FIXME! ", ex);
}
}
use of gov.nist.javax.sip.stack.SIPDialog in project XobotOS by xamarin.
the class SipProviderImpl method dialogErrorEvent.
/*
* (non-Javadoc)
* @see gov.nist.javax.sip.stack.SIPDialogEventListener#dialogErrorEvent(gov.nist.javax.sip.stack.SIPDialogErrorEvent)
*/
public synchronized void dialogErrorEvent(SIPDialogErrorEvent dialogErrorEvent) {
SIPDialog sipDialog = (SIPDialog) dialogErrorEvent.getSource();
Reason reason = Reason.AckNotReceived;
if (dialogErrorEvent.getErrorID() == SIPDialogErrorEvent.DIALOG_ACK_NOT_SENT_TIMEOUT) {
reason = Reason.AckNotSent;
} else if (dialogErrorEvent.getErrorID() == SIPDialogErrorEvent.DIALOG_REINVITE_TIMEOUT) {
reason = Reason.ReInviteTimeout;
}
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logDebug("Dialog TimeoutError occured on " + sipDialog);
}
DialogTimeoutEvent ev = new DialogTimeoutEvent(this, sipDialog, reason);
// Handling transport error like timeout
this.handleEvent(ev, null);
}
use of gov.nist.javax.sip.stack.SIPDialog in project XobotOS by xamarin.
the class SipProviderImpl method getNewDialog.
/*
* (non-Javadoc)
*
* @see javax.sip.SipProvider#getNewDialog(javax.sip.Transaction)
*/
public Dialog getNewDialog(Transaction transaction) throws SipException {
if (transaction == null)
throw new NullPointerException("Null transaction!");
if (!sipStack.isAlive())
throw new SipException("Stack is stopped.");
if (isAutomaticDialogSupportEnabled())
throw new SipException(" Error - AUTOMATIC_DIALOG_SUPPORT is on");
if (!sipStack.isDialogCreated(transaction.getRequest().getMethod()))
throw new SipException("Dialog cannot be created for this method " + transaction.getRequest().getMethod());
SIPDialog dialog = null;
SIPTransaction sipTransaction = (SIPTransaction) transaction;
if (transaction instanceof ServerTransaction) {
SIPServerTransaction st = (SIPServerTransaction) transaction;
Response response = st.getLastResponse();
if (response != null) {
if (response.getStatusCode() != 100)
throw new SipException("Cannot set dialog after response has been sent");
}
SIPRequest sipRequest = (SIPRequest) transaction.getRequest();
String dialogId = sipRequest.getDialogId(true);
dialog = sipStack.getDialog(dialogId);
if (dialog == null) {
dialog = sipStack.createDialog((SIPTransaction) transaction);
// create and register the dialog and add the inital route set.
dialog.addTransaction(sipTransaction);
dialog.addRoute(sipRequest);
sipTransaction.setDialog(dialog, null);
} else {
sipTransaction.setDialog(dialog, sipRequest.getDialogId(true));
}
if (sipRequest.getMethod().equals(Request.INVITE) && this.isDialogErrorsAutomaticallyHandled()) {
sipStack.putInMergeTable(st, sipRequest);
}
} else {
SIPClientTransaction sipClientTx = (SIPClientTransaction) transaction;
SIPResponse response = sipClientTx.getLastResponse();
if (response == null) {
// A response has not yet been received, then set this up as the
// default dialog.
SIPRequest request = (SIPRequest) sipClientTx.getRequest();
String dialogId = request.getDialogId(false);
dialog = sipStack.getDialog(dialogId);
if (dialog != null) {
throw new SipException("Dialog already exists!");
} else {
dialog = sipStack.createDialog(sipTransaction);
}
sipClientTx.setDialog(dialog, null);
} else {
throw new SipException("Cannot call this method after response is received!");
}
}
dialog.addEventListener(this);
return dialog;
}
use of gov.nist.javax.sip.stack.SIPDialog in project XobotOS by xamarin.
the class DialogFilter method processRequest.
/**
* Process a request. Check for various conditions in the dialog that can result in the
* message being dropped. Possibly return errors for these conditions.
*
* @exception SIPServerException is thrown when there is an error processing the request.
*/
public void processRequest(SIPRequest sipRequest, MessageChannel incomingMessageChannel) {
// Generate the wrapper JAIN-SIP object.
if (sipStack.isLoggingEnabled())
sipStack.getStackLogger().logDebug("PROCESSING INCOMING REQUEST " + sipRequest + " transactionChannel = " + transactionChannel + " listening point = " + listeningPoint.getIPAddress() + ":" + listeningPoint.getPort());
if (listeningPoint == null) {
if (sipStack.isLoggingEnabled())
sipStack.getStackLogger().logDebug("Dropping message: No listening point registered!");
return;
}
SipStackImpl sipStack = (SipStackImpl) transactionChannel.getSIPStack();
SipProviderImpl sipProvider = listeningPoint.getProvider();
if (sipProvider == null) {
if (sipStack.isLoggingEnabled())
sipStack.getStackLogger().logDebug("No provider - dropping !!");
return;
}
if (sipStack == null)
InternalErrorHandler.handleException("Egads! no sip stack!");
// Look for the registered SIPListener for the message channel.
SIPServerTransaction transaction = (SIPServerTransaction) this.transactionChannel;
if (transaction != null) {
if (sipStack.isLoggingEnabled())
sipStack.getStackLogger().logDebug("transaction state = " + transaction.getState());
}
String dialogId = sipRequest.getDialogId(true);
SIPDialog dialog = sipStack.getDialog(dialogId);
/*
* Check if we got this request on the contact address of the dialog If not the dialog
* does not belong to this request. We check this condition if a contact address has been
* assigned to the dialog. Forgive the sins of B2BUA's that like to record route ACK's
*/
if (dialog != null && sipProvider != dialog.getSipProvider()) {
Contact contact = dialog.getMyContactHeader();
if (contact != null) {
SipUri contactUri = (SipUri) (contact.getAddress().getURI());
String ipAddress = contactUri.getHost();
int contactPort = contactUri.getPort();
String contactTransport = contactUri.getTransportParam();
if (contactTransport == null)
contactTransport = "udp";
if (contactPort == -1) {
if (contactTransport.equals("udp") || contactTransport.equals("tcp"))
contactPort = 5060;
else
contactPort = 5061;
}
// dialog to the request.
if (ipAddress != null && (!ipAddress.equals(listeningPoint.getIPAddress()) || contactPort != listeningPoint.getPort())) {
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logDebug("nulling dialog -- listening point mismatch! " + contactPort + " lp port = " + listeningPoint.getPort());
}
dialog = null;
}
}
}
/*
* RFC 3261 8.2.2.2 Merged requests: If the request has no tag in the To header field, the
* UAS core MUST check the request against ongoing transactions. If the From tag, Call-ID,
* and CSeq exactly match those associated with an ongoing transaction, but the request
* does not match that transaction (based on the matching rules in Section 17.2.3), the
* UAS core SHOULD generate a 482 (Loop Detected) response and pass it to the server
* transaction. This support is only enabled when the stack has been instructed to
* function with Automatic Dialog Support.
*/
if (sipProvider.isAutomaticDialogSupportEnabled() && sipProvider.isDialogErrorsAutomaticallyHandled() && sipRequest.getToTag() == null) {
SIPServerTransaction sipServerTransaction = sipStack.findMergedTransaction(sipRequest);
if (sipServerTransaction != null) {
this.sendLoopDetectedResponse(sipRequest, transaction);
return;
}
}
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logDebug("dialogId = " + dialogId);
sipStack.getStackLogger().logDebug("dialog = " + dialog);
}
// endpoint, then the stack strips off the route header.
if (sipRequest.getHeader(Route.NAME) != null && transaction.getDialog() != null) {
RouteList routes = sipRequest.getRouteHeaders();
Route route = (Route) routes.getFirst();
SipUri uri = (SipUri) route.getAddress().getURI();
int port;
if (uri.getHostPort().hasPort()) {
port = uri.getHostPort().getPort();
} else {
if (listeningPoint.getTransport().equalsIgnoreCase("TLS"))
port = 5061;
else
port = 5060;
}
String host = uri.getHost();
if ((host.equals(listeningPoint.getIPAddress()) || host.equalsIgnoreCase(listeningPoint.getSentBy())) && port == listeningPoint.getPort()) {
if (routes.size() == 1)
sipRequest.removeHeader(Route.NAME);
else
routes.removeFirst();
}
}
if (sipRequest.getMethod().equals(Request.REFER) && dialog != null && sipProvider.isDialogErrorsAutomaticallyHandled()) {
/*
* An agent responding to a REFER method MUST return a 400 (Bad Request) if the
* request contained zero or more than one Refer-To header field values.
*/
ReferToHeader sipHeader = (ReferToHeader) sipRequest.getHeader(ReferTo.NAME);
if (sipHeader == null) {
this.sendBadRequestResponse(sipRequest, transaction, "Refer-To header is missing");
return;
}
/*
* A refer cannot be processed until we have either sent or received an ACK.
*/
SIPTransaction lastTransaction = ((SIPDialog) dialog).getLastTransaction();
if (lastTransaction != null && sipProvider.isDialogErrorsAutomaticallyHandled()) {
SIPRequest lastRequest = (SIPRequest) lastTransaction.getRequest();
if (lastTransaction instanceof SIPServerTransaction) {
if (!((SIPDialog) dialog).isAckSeen() && lastRequest.getMethod().equals(Request.INVITE)) {
this.sendRequestPendingResponse(sipRequest, transaction);
return;
}
} else if (lastTransaction instanceof SIPClientTransaction) {
long cseqno = lastRequest.getCSeqHeader().getSeqNumber();
String method = lastRequest.getMethod();
if (method.equals(Request.INVITE) && !dialog.isAckSent(cseqno)) {
this.sendRequestPendingResponse(sipRequest, transaction);
return;
}
}
}
} else if (sipRequest.getMethod().equals(Request.UPDATE)) {
/*
* Got an UPDATE method and the user dialog does not exist and the user wants to be a
* User agent.
*
*/
if (sipProvider.isAutomaticDialogSupportEnabled() && dialog == null) {
this.sendCallOrTransactionDoesNotExistResponse(sipRequest, transaction);
return;
}
} else if (sipRequest.getMethod().equals(Request.ACK)) {
if (transaction != null && transaction.isInviteTransaction()) {
// take care of it.
if (sipStack.isLoggingEnabled())
sipStack.getStackLogger().logDebug("Processing ACK for INVITE Tx ");
} else {
if (sipStack.isLoggingEnabled())
sipStack.getStackLogger().logDebug("Processing ACK for dialog " + dialog);
if (dialog == null) {
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logDebug("Dialog does not exist " + sipRequest.getFirstLine() + " isServerTransaction = " + true);
}
SIPServerTransaction st = sipStack.getRetransmissionAlertTransaction(dialogId);
if (st != null && st.isRetransmissionAlertEnabled()) {
st.disableRetransmissionAlerts();
}
/*
* JvB: must never drop ACKs that dont match a transaction! One cannot be sure
* if it isn't an ACK for a 2xx response
*
*/
SIPServerTransaction ackTransaction = sipStack.findTransactionPendingAck(sipRequest);
/*
* Found a transaction ( that we generated ) which is waiting for ACK. So ACK
* it and return.
*/
if (ackTransaction != null) {
if (sipStack.isLoggingEnabled())
sipStack.getStackLogger().logDebug("Found Tx pending ACK");
try {
ackTransaction.setAckSeen();
sipStack.removeTransaction(ackTransaction);
sipStack.removeTransactionPendingAck(ackTransaction);
} catch (Exception ex) {
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logError("Problem terminating transaction", ex);
}
}
return;
}
} else {
if (!dialog.handleAck(transaction)) {
if (!dialog.isSequnceNumberValidation()) {
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logDebug("Dialog exists with loose dialog validation " + sipRequest.getFirstLine() + " isServerTransaction = " + true + " dialog = " + dialog.getDialogId());
}
SIPServerTransaction st = sipStack.getRetransmissionAlertTransaction(dialogId);
if (st != null && st.isRetransmissionAlertEnabled()) {
st.disableRetransmissionAlerts();
}
} else {
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logDebug("Dropping ACK - cannot find a transaction or dialog");
}
SIPServerTransaction ackTransaction = sipStack.findTransactionPendingAck(sipRequest);
if (ackTransaction != null) {
if (sipStack.isLoggingEnabled())
sipStack.getStackLogger().logDebug("Found Tx pending ACK");
try {
ackTransaction.setAckSeen();
sipStack.removeTransaction(ackTransaction);
sipStack.removeTransactionPendingAck(ackTransaction);
} catch (Exception ex) {
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logError("Problem terminating transaction", ex);
}
}
}
return;
}
} else {
transaction.passToListener();
dialog.addTransaction(transaction);
dialog.addRoute(sipRequest);
transaction.setDialog(dialog, dialogId);
if (sipRequest.getMethod().equals(Request.INVITE) && sipProvider.isDialogErrorsAutomaticallyHandled()) {
sipStack.putInMergeTable(transaction, sipRequest);
}
if (sipStack.deliverTerminatedEventForAck) {
try {
sipStack.addTransaction(transaction);
transaction.scheduleAckRemoval();
} catch (IOException ex) {
}
} else {
transaction.setMapped(true);
}
}
}
}
} else if (sipRequest.getMethod().equals(Request.PRACK)) {
if (sipStack.isLoggingEnabled())
sipStack.getStackLogger().logDebug("Processing PRACK for dialog " + dialog);
if (dialog == null && sipProvider.isAutomaticDialogSupportEnabled()) {
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logDebug("Dialog does not exist " + sipRequest.getFirstLine() + " isServerTransaction = " + true);
}
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logDebug("Sending 481 for PRACK - automatic dialog support is enabled -- cant find dialog!");
}
SIPResponse notExist = sipRequest.createResponse(Response.CALL_OR_TRANSACTION_DOES_NOT_EXIST);
try {
sipProvider.sendResponse(notExist);
} catch (SipException e) {
sipStack.getStackLogger().logError("error sending response", e);
}
if (transaction != null) {
sipStack.removeTransaction(transaction);
transaction.releaseSem();
}
return;
} else if (dialog != null) {
if (!dialog.handlePrack(sipRequest)) {
if (sipStack.isLoggingEnabled())
sipStack.getStackLogger().logDebug("Dropping out of sequence PRACK ");
if (transaction != null) {
sipStack.removeTransaction(transaction);
transaction.releaseSem();
}
return;
} else {
try {
sipStack.addTransaction(transaction);
dialog.addTransaction(transaction);
dialog.addRoute(sipRequest);
transaction.setDialog(dialog, dialogId);
} catch (Exception ex) {
InternalErrorHandler.handleException(ex);
}
}
} else {
if (sipStack.isLoggingEnabled())
sipStack.getStackLogger().logDebug("Processing PRACK without a DIALOG -- this must be a proxy element");
}
} else if (sipRequest.getMethod().equals(Request.BYE)) {
// Check for correct sequence numbering of the BYE
if (dialog != null && !dialog.isRequestConsumable(sipRequest)) {
if (sipStack.isLoggingEnabled())
sipStack.getStackLogger().logDebug("Dropping out of sequence BYE " + dialog.getRemoteSeqNumber() + " " + sipRequest.getCSeq().getSeqNumber());
if (dialog.getRemoteSeqNumber() >= sipRequest.getCSeq().getSeqNumber() && transaction.getState() == TransactionState.TRYING) {
this.sendServerInternalErrorResponse(sipRequest, transaction);
}
// If the stack knows about the tx, then remove it.
if (transaction != null)
sipStack.removeTransaction(transaction);
return;
} else if (dialog == null && sipProvider.isAutomaticDialogSupportEnabled()) {
// Drop bye's with 481 if dialog does not exist.
// If dialog support is enabled then
// there must be a dialog associated with the bye
// No dialog could be found and requests on this
// provider. Must act like a user agent -- so drop the request.
// NOTE: if Automatic dialog support is not enabled,
// then it is the application's responsibility to
// take care of this error condition possibly.
SIPResponse response = sipRequest.createResponse(Response.CALL_OR_TRANSACTION_DOES_NOT_EXIST);
response.setReasonPhrase("Dialog Not Found");
if (sipStack.isLoggingEnabled())
sipStack.getStackLogger().logDebug("dropping request -- automatic dialog " + "support enabled and dialog does not exist!");
try {
transaction.sendResponse(response);
} catch (SipException ex) {
sipStack.getStackLogger().logError("Error in sending response", ex);
}
// If the stack knows about the tx, then remove it.
if (transaction != null) {
sipStack.removeTransaction(transaction);
transaction.releaseSem();
transaction = null;
}
return;
}
// to manage its own dialog layer.
if (transaction != null && dialog != null) {
try {
if (sipProvider == dialog.getSipProvider()) {
sipStack.addTransaction(transaction);
dialog.addTransaction(transaction);
transaction.setDialog(dialog, dialogId);
}
} catch (IOException ex) {
InternalErrorHandler.handleException(ex);
}
}
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logDebug("BYE Tx = " + transaction + " isMapped =" + transaction.isTransactionMapped());
}
} else if (sipRequest.getMethod().equals(Request.CANCEL)) {
SIPServerTransaction st = (SIPServerTransaction) sipStack.findCancelTransaction(sipRequest, true);
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logDebug("Got a CANCEL, InviteServerTx = " + st + " cancel Server Tx ID = " + transaction + " isMapped = " + transaction.isTransactionMapped());
}
// Check if we can process the CANCEL request.
if (sipRequest.getMethod().equals(Request.CANCEL)) {
// default action and avoid bothering the listener.
if (st != null && st.getState() == SIPTransaction.TERMINATED_STATE) {
// just respond OK to the CANCEL and bail.
if (sipStack.isLoggingEnabled())
sipStack.getStackLogger().logDebug("Too late to cancel Transaction");
// send OK and just ignore the CANCEL.
try {
transaction.sendResponse(sipRequest.createResponse(Response.OK));
} catch (Exception ex) {
if (ex.getCause() != null && ex.getCause() instanceof IOException) {
st.raiseIOExceptionEvent();
}
}
return;
}
if (sipStack.isLoggingEnabled())
sipStack.getStackLogger().logDebug("Cancel transaction = " + st);
}
if (transaction != null && st != null && st.getDialog() != null) {
// Found an invite tx corresponding to the CANCEL.
// Set up the client tx and pass up to listener.
transaction.setDialog((SIPDialog) st.getDialog(), dialogId);
dialog = (SIPDialog) st.getDialog();
} else if (st == null && sipProvider.isAutomaticDialogSupportEnabled() && transaction != null) {
// Could not find a invite tx corresponding to the CANCEL.
// Automatic dialog support is enabled so I must behave like
// an endpoint on this provider.
// Send the error response for the cancel.
SIPResponse response = sipRequest.createResponse(Response.CALL_OR_TRANSACTION_DOES_NOT_EXIST);
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logDebug("dropping request -- automatic dialog support " + "enabled and INVITE ST does not exist!");
}
try {
sipProvider.sendResponse(response);
} catch (SipException ex) {
InternalErrorHandler.handleException(ex);
}
if (transaction != null) {
sipStack.removeTransaction(transaction);
transaction.releaseSem();
}
return;
}
// statefully handled.
if (st != null) {
try {
if (transaction != null) {
sipStack.addTransaction(transaction);
transaction.setPassToListener();
transaction.setInviteTransaction(st);
// Dont let the INVITE and CANCEL be concurrently
// processed.
st.acquireSem();
}
} catch (Exception ex) {
InternalErrorHandler.handleException(ex);
}
}
} else if (sipRequest.getMethod().equals(Request.INVITE)) {
SIPTransaction lastTransaction = dialog == null ? null : dialog.getInviteTransaction();
if (dialog != null && transaction != null && lastTransaction != null && sipRequest.getCSeq().getSeqNumber() > dialog.getRemoteSeqNumber() && lastTransaction instanceof SIPServerTransaction && sipProvider.isDialogErrorsAutomaticallyHandled() && dialog.isSequnceNumberValidation() && lastTransaction.isInviteTransaction() && lastTransaction.getState() != TransactionState.COMPLETED && lastTransaction.getState() != TransactionState.TERMINATED && lastTransaction.getState() != TransactionState.CONFIRMED) {
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logDebug("Sending 500 response for out of sequence message");
}
this.sendServerInternalErrorResponse(sipRequest, transaction);
return;
}
/*
* Saw an interleaved invite before ACK was sent. RFC 3261 Chapter 14. A UAS that
* receives an INVITE on a dialog while an INVITE it had sent on that dialog is in
* progress MUST return a 491 (Request Pending) response to the received INVITE.
*/
lastTransaction = (dialog == null ? null : dialog.getLastTransaction());
if (dialog != null && sipProvider.isDialogErrorsAutomaticallyHandled() && lastTransaction != null && lastTransaction.isInviteTransaction() && lastTransaction instanceof ClientTransaction && lastTransaction.getLastResponse() != null && lastTransaction.getLastResponse().getStatusCode() == 200 && !dialog.isAckSent(lastTransaction.getLastResponse().getCSeq().getSeqNumber())) {
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logDebug("Sending 491 response for client Dialog ACK not sent.");
}
this.sendRequestPendingResponse(sipRequest, transaction);
return;
}
if (dialog != null && lastTransaction != null && sipProvider.isDialogErrorsAutomaticallyHandled() && lastTransaction.isInviteTransaction() && lastTransaction instanceof ServerTransaction && !dialog.isAckSeen()) {
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logDebug("Sending 491 response for server Dialog ACK not seen.");
}
this.sendRequestPendingResponse(sipRequest, transaction);
return;
}
}
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logDebug("CHECK FOR OUT OF SEQ MESSAGE " + dialog + " transaction " + transaction);
}
if (dialog != null && transaction != null && !sipRequest.getMethod().equals(Request.BYE) && !sipRequest.getMethod().equals(Request.CANCEL) && !sipRequest.getMethod().equals(Request.ACK) && !sipRequest.getMethod().equals(Request.PRACK)) {
if (!dialog.isRequestConsumable(sipRequest)) {
// Drop the request
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logDebug("Dropping out of sequence message " + dialog.getRemoteSeqNumber() + " " + sipRequest.getCSeq());
}
if (dialog.getRemoteSeqNumber() >= sipRequest.getCSeq().getSeqNumber() && sipProvider.isDialogErrorsAutomaticallyHandled() && (transaction.getState() == TransactionState.TRYING || transaction.getState() == TransactionState.PROCEEDING)) {
this.sendServerInternalErrorResponse(sipRequest, transaction);
}
return;
}
try {
if (sipProvider == dialog.getSipProvider()) {
sipStack.addTransaction(transaction);
// This will set the remote sequence number.
dialog.addTransaction(transaction);
dialog.addRoute(sipRequest);
transaction.setDialog(dialog, dialogId);
}
} catch (IOException ex) {
transaction.raiseIOExceptionEvent();
sipStack.removeTransaction(transaction);
return;
}
}
RequestEvent sipEvent;
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logDebug(sipRequest.getMethod() + " transaction.isMapped = " + transaction.isTransactionMapped());
}
if (dialog == null && sipRequest.getMethod().equals(Request.NOTIFY)) {
SIPClientTransaction pendingSubscribeClientTx = sipStack.findSubscribeTransaction(sipRequest, listeningPoint);
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logDebug("PROCESSING NOTIFY DIALOG == null " + pendingSubscribeClientTx);
}
/*
* RFC 3265: Upon receiving a NOTIFY request, the subscriber should check that it
* matches at least one of its outstanding subscriptions; if not, it MUST return a
* "481 Subscription does not exist" response unless another 400- or -class response
* is more appropriate.
*/
if (sipProvider.isAutomaticDialogSupportEnabled() && pendingSubscribeClientTx == null && !sipStack.deliverUnsolicitedNotify) {
/*
* This is the case of the UAC receiving a Stray NOTIFY for which it has not
* previously sent out a SUBSCRIBE and for which it does not have an established
* dialog.
*/
try {
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logDebug("Could not find Subscription for Notify Tx.");
}
Response errorResponse = sipRequest.createResponse(Response.CALL_OR_TRANSACTION_DOES_NOT_EXIST);
errorResponse.setReasonPhrase("Subscription does not exist");
sipProvider.sendResponse(errorResponse);
return;
} catch (Exception ex) {
sipStack.getStackLogger().logError("Exception while sending error response statelessly", ex);
return;
}
}
// notify to this dialog and pass it up.
if (pendingSubscribeClientTx != null) {
// The response to the pending subscribe tx can try to create
// a dialog at the same time that the notify is trying to
// create a dialog. Thus we cannot process both at the
// same time.
transaction.setPendingSubscribe(pendingSubscribeClientTx);
// The transaction gets assigned to the dialog from the
// outgoing subscribe. First see if anybody claimed the
// default Dialog for the outgoing Subscribe request.
SIPDialog subscriptionDialog = (SIPDialog) pendingSubscribeClientTx.getDefaultDialog();
// TODO -- refactor this. Can probably be written far cleaner.
if (subscriptionDialog == null || subscriptionDialog.getDialogId() == null || !subscriptionDialog.getDialogId().equals(dialogId)) {
// the notify.
if (subscriptionDialog != null && subscriptionDialog.getDialogId() == null) {
subscriptionDialog.setDialogId(dialogId);
} else {
subscriptionDialog = pendingSubscribeClientTx.getDialog(dialogId);
}
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logDebug("PROCESSING NOTIFY Subscribe DIALOG " + subscriptionDialog);
}
// the SUBSCRIBE on the subscribe tx.
if (subscriptionDialog == null && (sipProvider.isAutomaticDialogSupportEnabled() || pendingSubscribeClientTx.getDefaultDialog() != null)) {
Event event = (Event) sipRequest.getHeader(EventHeader.NAME);
if (sipStack.isEventForked(event.getEventType())) {
subscriptionDialog = SIPDialog.createFromNOTIFY(pendingSubscribeClientTx, transaction);
}
}
if (subscriptionDialog != null) {
transaction.setDialog(subscriptionDialog, dialogId);
subscriptionDialog.setState(DialogState.CONFIRMED.getValue());
sipStack.putDialog(subscriptionDialog);
pendingSubscribeClientTx.setDialog(subscriptionDialog, dialogId);
if (!transaction.isTransactionMapped()) {
this.sipStack.mapTransaction(transaction);
// Let the listener see it if it just got
// created.
// otherwise, we have already processed the tx
// so
// we dont want the listener to see it.
transaction.setPassToListener();
try {
this.sipStack.addTransaction(transaction);
} catch (Exception ex) {
}
}
}
} else {
// The subscription default dialog is our dialog.
// Found a subscrbe dialog for the NOTIFY
// So map the tx.
transaction.setDialog(subscriptionDialog, dialogId);
dialog = subscriptionDialog;
if (!transaction.isTransactionMapped()) {
this.sipStack.mapTransaction(transaction);
// Let the listener see it if it just got created.
// otherwise, we have already processed the tx so
// we dont want the listener to see it.
transaction.setPassToListener();
try {
this.sipStack.addTransaction(transaction);
} catch (Exception ex) {
}
}
sipStack.putDialog(subscriptionDialog);
if (pendingSubscribeClientTx != null) {
subscriptionDialog.addTransaction(pendingSubscribeClientTx);
pendingSubscribeClientTx.setDialog(subscriptionDialog, dialogId);
}
}
if (transaction != null && ((SIPServerTransaction) transaction).isTransactionMapped()) {
// Shadow transaction has been created and the stack
// knows
// about it.
sipEvent = new RequestEvent((SipProvider) sipProvider, (ServerTransaction) transaction, subscriptionDialog, (Request) sipRequest);
} else {
// Shadow transaction has been created but the stack
// does
// not know
// about it.
sipEvent = new RequestEvent((SipProvider) sipProvider, null, subscriptionDialog, (Request) sipRequest);
}
} else {
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logDebug("could not find subscribe tx");
}
// Got a notify out of the blue - just pass it up
// for stateless handling by the application.
sipEvent = new RequestEvent(sipProvider, null, null, (Request) sipRequest);
}
} else {
// The listener can create the dialog if needed.
if (transaction != null && (((SIPServerTransaction) transaction).isTransactionMapped())) {
sipEvent = new RequestEvent(sipProvider, (ServerTransaction) transaction, dialog, (Request) sipRequest);
} else {
sipEvent = new RequestEvent(sipProvider, null, dialog, (Request) sipRequest);
}
}
sipProvider.handleEvent(sipEvent, transaction);
}
use of gov.nist.javax.sip.stack.SIPDialog in project XobotOS by xamarin.
the class DialogFilter method processResponse.
/*
* (non-Javadoc)
*
* @see gov.nist.javax.sip.stack.ServerResponseInterface#processResponse(gov.nist.javax.sip.message.SIPResponse,
* gov.nist.javax.sip.stack.MessageChannel)
*/
public void processResponse(SIPResponse sipResponse, MessageChannel incomingChannel) {
String dialogID = sipResponse.getDialogId(false);
SIPDialog sipDialog = this.sipStack.getDialog(dialogID);
String method = sipResponse.getCSeq().getMethod();
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logDebug("PROCESSING INCOMING RESPONSE: " + sipResponse.encodeMessage());
}
if (sipStack.checkBranchId() && !Utils.getInstance().responseBelongsToUs(sipResponse)) {
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logError("Detected stray response -- dropping");
}
return;
}
if (listeningPoint == null) {
if (sipStack.isLoggingEnabled())
sipStack.getStackLogger().logDebug("Dropping message: No listening point" + " registered!");
return;
}
SipProviderImpl sipProvider = listeningPoint.getProvider();
if (sipProvider == null) {
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logDebug("Dropping message: no provider");
}
return;
}
if (sipProvider.getSipListener() == null) {
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logDebug("Dropping message: no sipListener registered!");
}
return;
}
SIPClientTransaction transaction = (SIPClientTransaction) this.transactionChannel;
// 3PCC).
if (sipDialog == null && transaction != null) {
sipDialog = transaction.getDialog(dialogID);
if (sipDialog != null && sipDialog.getState() == DialogState.TERMINATED)
sipDialog = null;
}
if (sipStack.isLoggingEnabled())
sipStack.getStackLogger().logDebug("Transaction = " + transaction + " sipDialog = " + sipDialog);
if (this.transactionChannel != null) {
String originalFrom = ((SIPRequest) this.transactionChannel.getRequest()).getFromTag();
if (originalFrom == null ^ sipResponse.getFrom().getTag() == null) {
if (sipStack.isLoggingEnabled())
sipStack.getStackLogger().logDebug("From tag mismatch -- dropping response");
return;
}
if (originalFrom != null && !originalFrom.equalsIgnoreCase(sipResponse.getFrom().getTag())) {
if (sipStack.isLoggingEnabled())
sipStack.getStackLogger().logDebug("From tag mismatch -- dropping response");
return;
}
}
if (sipStack.isDialogCreated(method) && sipResponse.getStatusCode() != 100 && sipResponse.getFrom().getTag() != null && sipResponse.getTo().getTag() != null && sipDialog == null) {
if (sipProvider.isAutomaticDialogSupportEnabled()) {
if (this.transactionChannel != null) {
if (sipDialog == null) {
// There could be an existing dialog for this response.
sipDialog = sipStack.createDialog((SIPClientTransaction) this.transactionChannel, sipResponse);
this.transactionChannel.setDialog(sipDialog, sipResponse.getDialogId(false));
}
} else {
sipDialog = this.sipStack.createDialog(sipProvider, sipResponse);
}
}
} else {
// Have a dialog but could not find transaction.
if (sipDialog != null && transaction == null && sipDialog.getState() != DialogState.TERMINATED) {
if (sipResponse.getStatusCode() / 100 != 2) {
if (sipStack.isLoggingEnabled())
sipStack.getStackLogger().logDebug("status code != 200 ; statusCode = " + sipResponse.getStatusCode());
} else if (sipDialog.getState() == DialogState.TERMINATED) {
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logDebug("Dialog is terminated -- dropping response!");
}
// It could be late arriving.
if (sipResponse.getStatusCode() / 100 == 2 && sipResponse.getCSeq().getMethod().equals(Request.INVITE)) {
try {
Request ackRequest = sipDialog.createAck(sipResponse.getCSeq().getSeqNumber());
sipDialog.sendAck(ackRequest);
} catch (Exception ex) {
sipStack.getStackLogger().logError("Error creating ack", ex);
}
}
return;
} else {
boolean ackAlreadySent = false;
if (sipDialog.isAckSeen() && sipDialog.getLastAckSent() != null) {
if (sipDialog.getLastAckSent().getCSeq().getSeqNumber() == sipResponse.getCSeq().getSeqNumber() && sipResponse.getDialogId(false).equals(sipDialog.getLastAckSent().getDialogId(false))) {
// the last ack sent corresponded to this 200
ackAlreadySent = true;
}
}
// 200 retransmission for the final response.
if (ackAlreadySent && sipResponse.getCSeq().getMethod().equals(sipDialog.getMethod())) {
try {
// dont pass up the null transaction
if (sipStack.isLoggingEnabled())
sipStack.getStackLogger().logDebug("resending ACK");
sipDialog.resendAck();
return;
} catch (SipException ex) {
// What to do here ?? kill the dialog?
}
}
}
}
// Pass the response up to the application layer to handle
// statelessly.
}
if (sipStack.isLoggingEnabled())
sipStack.getStackLogger().logDebug("sending response to TU for processing ");
if (sipDialog != null && sipResponse.getStatusCode() != 100 && sipResponse.getTo().getTag() != null) {
sipDialog.setLastResponse(transaction, sipResponse);
}
ResponseEventExt responseEvent = new ResponseEventExt(sipProvider, (ClientTransactionExt) transaction, sipDialog, (Response) sipResponse);
if (sipResponse.getCSeq().getMethod().equals(Request.INVITE)) {
ClientTransactionExt originalTx = this.sipStack.getForkedTransaction(sipResponse.getTransactionId());
responseEvent.setOriginalTransaction(originalTx);
}
sipProvider.handleEvent(responseEvent, transaction);
}
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