Can't open local port

Question

Hello all
I would be very grateful for some help with this problem,I haven;t been able so solve and i have spend a lot of time on it
I have written my own client RTSP code,from this i can set the client ports i want to recieve and send RTCP and recieve RTP,and can read in the server ports
So i have something like 157.190.181.36 60972 60973 client
157.190.181.36 6972 6973 server
To handle RTP i have used RTP socket player or RX and may other RTP reciver options,as in the java solutions etc ,so that i can recieve RTP and create a player
When i run them i get the same eror from all error can't open local port
Further information
I am on a LAN,but hav tried my set up disconnected from the LAN through a hub set up
I have tried opening the ports before callled the RTP players i.e
on the client side
DatagramSocket RTPsocket3= new DatagramSocket(60972);
DatagramSocket RTPsocket4= new DatagramSocket(60973);
Through sniffers
I know the RTSP messages are OK
I recive an ICMP message destination unreachable
I am connecting to darwin streaming server and i can connect to this and play through apple quicktime player or JM studioTHANKS IN ADVANCE!

Answer 1

Hey...
I'm having a similar problem, because i'm developing an application that its serving RTP audio context streams. So the application would transmit a playlist of files over RTP, and it works fine for one file, but when i try to give it a new file, i always get the exception "Can�t open door: ...". This error occurs on the line that is marked with *****.
I'm creating a processor for each file i want to transmit, for the same port and same IP address, so when the first file ends i close the processor and create a new one with the same properties, but with a diferent file...
I really nead this to work, so if someone could help me on this it would be really appreciated... Thanks in advance...
My code for creating the transmitter is like this:
private String createProcessor(){
     if (locator == null) return My_Dictionary.TRANSMIT_LOCATOR;
          try{
          ds = javax.media.Manager.createDataSource(locator);
          }catch (Exception e){
          return My_Dictionary.TRANSMIT_DATASOURCE;
          try{
          processor = javax.media.Manager.createProcessor(ds);
          }catch (NoProcessorException npe){
          return My_Dictionary.TRANSMIT_PROCESSOR;
          }catch (IOException ioe){
               return My_Dictionary.TRANSMIT_IO_PROCESSOR;
          boolean result = waitForState(processor,Processor.Configured);
          if (result == false) return My_Dictionary.TRANSMIT_PROCESSOR_CONFIG;
          TrackControl [ ] tracks = processor.getTrackControls();
          if (tracks == null || tracks.length < 1) return My_Dictionary.TRANSMIT_TRACKS;
          ContentDescriptor cd = new ContentDescriptor(ContentDescriptor.RAW_RTP);
          processor.setContentDescriptor(cd);
          Format supported[];
          Format chosen;
          boolean atLeastOneTrack = false;
          for (int i = 0; i < tracks.length; i++){
          if (tracks.isEnabled()){
                    supported = tracks[i].getSupportedFormats();
                    if (supported.length > 0){
                         for (int j = 0; j < supported.length; j++){
                              if (supported[j] instanceof AudioFormat){
                                   if (supported[j].matches(Transmit.audioformat)){
                                        chosen = supported[j];
                                   tracks[i].setFormat(chosen);
                                   atLeastOneTrack = true;
                                   System.out.println("Track " + i + " is set to transmit as: " + chosen);
                    }else tracks[i].setEnabled(false);
          }else tracks[i].setEnabled(false);
          if (!atLeastOneTrack) return My_Dictionary.TRANSMIT_ANY_TRACKS;
          result = waitForState(processor,Controller.Realized);
          if (result == false) return My_Dictionary.TRANSMIT_PROCESSOR_REALIZE;
          dataOutput = processor.getDataOutput();
          return null;
private static String createTransmitter(){
          PushBufferDataSource pbds = (PushBufferDataSource)dataOutput;
          PushBufferStream pbss[] = pbds.getStreams();
          rtpMgrs = new RTPManager[pbss.length];
          SessionAddress localAddr, destAddr;
          InetAddress ipAddr;
          SendStream sendStream;
          int port;
          for (int i = 0; i < pbss.length; i++){
          try{
                    rtpMgrs[i] = RTPManager.newInstance();     
                    port = portBase + 2*i;
                    ipAddr = InetAddress.getByName(ipAddress);
                    localAddr = new SessionAddress(InetAddress.getLocalHost(),port);
                    destAddr = new SessionAddress(ipAddr,port);
                    rtpMgrs[i].initialize(localAddr); *****
                    rtpMgrs[i].addTarget(destAddr);
                    System.out.println("Created RTP session: " + ipAddress + "/" + port);
                    sendStream = rtpMgrs[i].createSendStream(dataOutput,i);
                    sendStream.start();
          }catch (Exception e){
                    return e.getMessage();
          return null;