if (clientTransactionId == null)
throw new NullPointerException("null parameter");
if (dialogRequest.getMethod().equals(Request.ACK)
|| dialogRequest.getMethod().equals(Request.CANCEL))
throw new SipException("Bad Request Method. " + dialogRequest.getMethod());
// JvB: added, allow re-sending of BYE after challenge
if (byeSent && isTerminatedOnBye() && !dialogRequest.getMethod().equals(Request.BYE)) {
if (sipStack.isLoggingEnabled())
sipStack.getStackLogger().logError("BYE already sent for " + this);
throw new SipException("Cannot send request; BYE already sent");
}
if (dialogRequest.getTopmostVia() == null) {
Via via = ((SIPClientTransaction) clientTransactionId).getOutgoingViaHeader();
dialogRequest.addHeader(via);
}
if (!this.getCallId().getCallId().equalsIgnoreCase(dialogRequest.getCallId().getCallId())) {
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logError("CallID " + this.getCallId());
sipStack.getStackLogger().logError(
"RequestCallID = " + dialogRequest.getCallId().getCallId());
sipStack.getStackLogger().logError("dialog = " + this);
}
throw new SipException("Bad call ID in request");
}
// Set the dialog back pointer.
((SIPClientTransaction) clientTransactionId).setDialog(this, this.dialogId);
this.addTransaction((SIPTransaction) clientTransactionId);
// Enable the retransmission filter for the transaction
((SIPClientTransaction) clientTransactionId).isMapped = true;
From from = (From) dialogRequest.getFrom();
To to = (To) dialogRequest.getTo();
// Caller already did the tag assignment -- check to see if the
// tag assignment is OK.
if (this.getLocalTag() != null && from.getTag() != null
&& !from.getTag().equals(this.getLocalTag()))
throw new SipException("From tag mismatch expecting " + this.getLocalTag());
if (this.getRemoteTag() != null && to.getTag() != null
&& !to.getTag().equals(this.getRemoteTag())) {
if (sipStack.isLoggingEnabled())
this.sipStack.getStackLogger().logWarning(
"To header tag mismatch expecting " + this.getRemoteTag());
}
/*
* The application is sending a NOTIFY before sending the response of the dialog.
*/
if (this.getLocalTag() == null && dialogRequest.getMethod().equals(Request.NOTIFY)) {
if (!this.getMethod().equals(Request.SUBSCRIBE))
throw new SipException("Trying to send NOTIFY without SUBSCRIBE Dialog!");
this.setLocalTag(from.getTag());
}
try {
if (this.getLocalTag() != null)
from.setTag(this.getLocalTag());
if (this.getRemoteTag() != null)
to.setTag(this.getRemoteTag());
} catch (ParseException ex) {
InternalErrorHandler.handleException(ex);
}
Hop hop = ((SIPClientTransaction) clientTransactionId).getNextHop();
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logDebug(
"Using hop = " + hop.getHost() + " : " + hop.getPort());
}
try {
MessageChannel messageChannel = sipStack.createRawMessageChannel(this
.getSipProvider().getListeningPoint(hop.getTransport()).getIPAddress(),
this.firstTransactionPort, hop);
MessageChannel oldChannel = ((SIPClientTransaction)
clientTransactionId).getMessageChannel();
// Remove this from the connection cache if it is in the
// connection
// cache and is not yet active.
oldChannel.uncache();
// Not configured to cache client connections.
if (!sipStack.cacheClientConnections) {
oldChannel.useCount--;
if (sipStack.isLoggingEnabled())
sipStack.getStackLogger().logDebug(
"oldChannel: useCount " + oldChannel.useCount);
}
if (messageChannel == null) {
/*
* At this point the procedures of 8.1.2 and 12.2.1.1 of RFC3261 have been tried
* but the resulting next hop cannot be resolved (recall that the exception thrown
* is caught and ignored in SIPStack.createMessageChannel() so we end up here with
* a null messageChannel instead of the exception handler below). All else
* failing, try the outbound proxy in accordance with 8.1.2, in particular: This
* ensures that outbound proxies that do not add Record-Route header field values
* will drop out of the path of subsequent requests. It allows endpoints that
* cannot resolve the first Route URI to delegate that task to an outbound proxy.
*
* if one considers the 'first Route URI' of a request constructed according to
* 12.2.1.1 to be the request URI when the route set is empty.
*/
if (sipStack.isLoggingEnabled())
sipStack.getStackLogger().logDebug(
"Null message channel using outbound proxy !");
Hop outboundProxy = sipStack.getRouter(dialogRequest).getOutboundProxy();
if (outboundProxy == null)
throw new SipException("No route found! hop=" + hop);
messageChannel = sipStack.createRawMessageChannel(this.getSipProvider()
.getListeningPoint(outboundProxy.getTransport()).getIPAddress(),
this.firstTransactionPort, outboundProxy);
if (messageChannel != null)
((SIPClientTransaction) clientTransactionId)
.setEncapsulatedChannel(messageChannel);
} else {
((SIPClientTransaction) clientTransactionId)
.setEncapsulatedChannel(messageChannel);
if (sipStack.isLoggingEnabled()) {
sipStack.getStackLogger().logDebug("using message channel " + messageChannel);
}
}
if (messageChannel != null) messageChannel.useCount++;
// See if we need to release the previously mapped channel.
if ((!sipStack.cacheClientConnections) && oldChannel != null
&& oldChannel.useCount <= 0)
oldChannel.close();
} catch (Exception ex) {
if (sipStack.isLoggingEnabled())
sipStack.getStackLogger().logException(ex);
throw new SipException("Could not create message channel", ex);
}
try {
// Increment before setting!!
localSequenceNumber++;
dialogRequest.getCSeq().setSeqNumber(getLocalSeqNumber());
} catch (InvalidArgumentException ex) {
sipStack.getStackLogger().logFatalError(ex.getMessage());
}
try {
((SIPClientTransaction) clientTransactionId).sendMessage(dialogRequest);
/*
* Note that if the BYE is rejected then the Dialog should bo back to the ESTABLISHED
* state so we only set state after successful send.
*/
if (dialogRequest.getMethod().equals(Request.BYE)) {
this.byeSent = true;
/*
* Dialog goes into TERMINATED state as soon as BYE is sent. ISSUE 182.
*/
if (isTerminatedOnBye()) {
this.setState(DialogState._TERMINATED);
}
}
} catch (IOException ex) {
throw new SipException("error sending message", ex);
}
}