public ClientTransaction preProcessInvite(SipRequest sipRequest) throws SipUriSyntaxException {
// 8.1.2
SipHeaders requestHeaders = sipRequest.getSipHeaders();
SipURI destinationUri = RequestManager.getDestinationUri(sipRequest, logger);
// TODO if header route is present, addrspec = toproute.nameaddress.addrspec
String transport = RFC3261.TRANSPORT_UDP;
Hashtable<String, String> params = destinationUri.getUriParameters();
if (params != null) {
String reqUriTransport = params.get(RFC3261.PARAM_TRANSPORT);
if (reqUriTransport != null) {
transport = reqUriTransport;
}
}
int port = destinationUri.getPort();
if (port == SipURI.DEFAULT_PORT) {
port = RFC3261.TRANSPORT_DEFAULT_PORT;
}
SipURI sipUri = userAgent.getConfig().getOutboundProxy();
if (sipUri == null) {
sipUri = destinationUri;
}
InetAddress inetAddress;
try {
inetAddress = InetAddress.getByName(sipUri.getHost());
} catch (UnknownHostException e) {
throw new SipUriSyntaxException("unknown host: " + sipUri.getHost(), e);
}
ClientTransaction clientTransaction =
transactionManager.createClientTransaction(
sipRequest, inetAddress, port, transport, null, this);
DatagramSocket datagramSocket;
synchronized (this) {
datagramSocket = getDatagramSocket();
}
try {
SessionDescription sessionDescription =
sdpManager.createSessionDescription(null, datagramSocket.getLocalPort());
sipRequest.setBody(sessionDescription.toString().getBytes());
} catch (IOException e) {
logger.error(e.getMessage(), e);
}
requestHeaders.add(
new SipHeaderFieldName(RFC3261.HDR_CONTENT_TYPE),
new SipHeaderFieldValue(RFC3261.CONTENT_TYPE_SDP));
return clientTransaction;
}
public void successResponseReceived(SipResponse sipResponse, Transaction transaction) {
SipHeaders responseHeaders = sipResponse.getSipHeaders();
String cseq = responseHeaders.get(new SipHeaderFieldName(RFC3261.HDR_CSEQ)).getValue();
String method = cseq.substring(cseq.trim().lastIndexOf(' ') + 1);
if (!RFC3261.METHOD_INVITE.equals(method)) {
return;
}
challenged = false;
// 13.2.2.4
List<String> peers = userAgent.getPeers();
String responseTo = responseHeaders.get(new SipHeaderFieldName(RFC3261.HDR_TO)).getValue();
if (!peers.contains(responseTo)) {
peers.add(responseTo);
// timer used to purge dialogs which are not confirmed
// after a given time
ackTimer.schedule(new AckTimerTask(responseTo), 64 * RFC3261.TIMER_T1);
}
Dialog dialog = dialogManager.getDialog(sipResponse);
if (dialog != null) {
// dialog already created with a 180 for example
dialog.setRouteSet(computeRouteSet(sipResponse.getSipHeaders()));
}
dialog = buildOrUpdateDialogForUac(sipResponse, transaction);
SipListener sipListener = userAgent.getSipListener();
if (sipListener != null) {
sipListener.calleePickup(sipResponse);
}
// added for media
SessionDescription sessionDescription = sdpManager.parse(sipResponse.getBody());
try {
mediaDestination = sdpManager.getMediaDestination(sessionDescription);
} catch (NoCodecException e) {
logger.error(e.getMessage(), e);
}
String remoteAddress = mediaDestination.getDestination();
int remotePort = mediaDestination.getPort();
Codec codec = mediaDestination.getCodec();
String localAddress = userAgent.getConfig().getLocalInetAddress().getHostAddress();
userAgent
.getMediaManager()
.successResponseReceived(localAddress, remoteAddress, remotePort, codec);
// switch to confirmed state
dialog.receivedOrSent2xx();
// generate ack
// p. 82 §3
SipRequest ack = dialog.buildSubsequentRequest(RFC3261.METHOD_ACK);
// update CSeq
SipHeaders ackHeaders = ack.getSipHeaders();
SipHeaderFieldName cseqName = new SipHeaderFieldName(RFC3261.HDR_CSEQ);
SipHeaderFieldValue ackCseq = ackHeaders.get(cseqName);
SipRequest request = transaction.getRequest();
SipHeaders requestHeaders = request.getSipHeaders();
SipHeaderFieldValue requestCseq = requestHeaders.get(cseqName);
ackCseq.setValue(requestCseq.toString().replace(RFC3261.METHOD_INVITE, RFC3261.METHOD_ACK));
// add Via with only the branchid parameter
SipHeaderFieldValue via = new SipHeaderFieldValue("");
SipHeaderParamName branchIdName = new SipHeaderParamName(RFC3261.PARAM_BRANCH);
via.addParam(branchIdName, Utils.generateBranchId());
ackHeaders.add(new SipHeaderFieldName(RFC3261.HDR_VIA), via, 0);
// TODO authentication headers
if (request.getBody() == null && sipResponse.getBody() != null) {
// TODO add a real SDP answer
ack.setBody(sipResponse.getBody());
}
// TODO check if sdp is acceptable
SipURI destinationUri = RequestManager.getDestinationUri(ack, logger);
challengeManager.postProcess(ack);
// TODO if header route is present, addrspec = toproute.nameaddress.addrspec
String transport = RFC3261.TRANSPORT_UDP;
Hashtable<String, String> params = destinationUri.getUriParameters();
if (params != null) {
String reqUriTransport = params.get(RFC3261.PARAM_TRANSPORT);
if (reqUriTransport != null) {
transport = reqUriTransport;
}
}
int port = destinationUri.getPort();
if (port == SipURI.DEFAULT_PORT) {
port = RFC3261.TRANSPORT_DEFAULT_PORT;
}
SipURI sipUri = userAgent.getConfig().getOutboundProxy();
if (sipUri == null) {
sipUri = destinationUri;
}
InetAddress inetAddress;
try {
inetAddress = InetAddress.getByName(sipUri.getHost());
} catch (UnknownHostException e) {
logger.error("unknown host: " + sipUri.getHost(), e);
return;
}
try {
MessageSender sender =
transportManager.createClientTransport(ack, inetAddress, port, transport);
sender.sendMessage(ack);
} catch (IOException e) {
logger.error("input/output error", e);
}
List<String> guiClosedCallIds = userAgent.getUac().getGuiClosedCallIds();
String callId = Utils.getMessageCallId(sipResponse);
if (guiClosedCallIds.contains(callId)) {
userAgent.terminate(request);
}
}