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;
}
// note that the transaction may be null (which
// happens when no dialog for the bye was found.
// and automatic dialog support is disabled (i.e. the app wants
// 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());
}
// Processing incoming CANCEL.
// Check if we can process the CANCEL request.
if (sipRequest.getMethod().equals(Request.CANCEL)) {
// If the CANCEL comes in too late, there's not
// much that the Listener can do so just do the
// default action and avoid bothering the listener.
if (st != null && st.getState() == SIPTransaction.TERMINATED_STATE) {
// If transaction already exists but it is
// too late to cancel the transaction then
// 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!");