boolean isInitial = requestEvent.getDialog() == null;
if (isInitial) {
// JvB: need random tags to test forking
String toTag = Integer.toHexString((int) (Math.random() * Integer.MAX_VALUE));
response = messageFactory.createResponse(202, request);
ToHeader toHeader = (ToHeader) response.getHeader(ToHeader.NAME);
// Sanity check: to header should not ahve a tag. Else the dialog
// should have matched
if (toHeader.getTag() != null) {
System.err
.println("####ERROR: To-tag!=null but no dialog match! My dialog="
+ dialog.getState());
}
toHeader.setTag(toTag); // Application is supposed to set.
this.dialog = st.getDialog();
// subscribe dialogs do not terminate on bye.
this.dialog.terminateOnBye(false);
if (dialog != null) {
logger.info("Dialog " + dialog);
logger.info("Dialog state " + dialog.getState());
}
} else {
response = messageFactory.createResponse(200, request);
}
// Both 2xx response to SUBSCRIBE and NOTIFY need a Contact
Address address = addressFactory.createAddress("Notifier <sip:127.0.0.1>");
((SipURI) address.getURI()).setPort(udpProvider.getListeningPoint("udp")
.getPort());
ContactHeader contactHeader = headerFactory.createContactHeader(address);
response.addHeader(contactHeader);
// Expires header is mandatory in 2xx responses to SUBSCRIBE
ExpiresHeader expires = (ExpiresHeader) request.getHeader(ExpiresHeader.NAME);
if (expires == null) {
expires = headerFactory.createExpiresHeader(30); // rather short
}
response.addHeader(expires);
/*
* NOTIFY requests MUST contain a "Subscription-State" header with a value of
* "active", "pending", or "terminated". The "active" value indicates that the
* subscription has been accepted and has been authorized (in most cases; see
* section 5.2.). The "pending" value indicates that the subscription has been
* received, but that policy information is insufficient to accept or deny the
* subscription at this time. The "terminated" value indicates that the
* subscription is not active.
*/
Address fromAddress = ((ToHeader) response.getHeader(ToHeader.NAME)).getAddress();
String fromTag = ((ToHeader) response.getHeader(ToHeader.NAME)).getTag();
FromHeader fromHeader = headerFactory.createFromHeader(fromAddress, fromTag);
Address toAddress = ((FromHeader) response.getHeader(FromHeader.NAME)).getAddress();
String toTag = ((FromHeader) response.getHeader(FromHeader.NAME)).getTag();
ToHeader toHeader = headerFactory.createToHeader(toAddress, toTag);
CallIdHeader callId = (CallIdHeader) response.getHeader(CallIdHeader.NAME);