title: ACE and asynchronous UDP communication
body: <p>I am currently working on a robotics simulation environment.
  Robots, that can interact with he virtual wold can be controlled/monitored via a network connection.
  For the whole network communication (and of course other things e.g. Threads) we use the ACE library.
  The problem I have now is that it seems to me that the asynchronous UDP part is broken.
  When running the test program "test_udp_proactor -h localhost -p 55555" that comes with ACE I will always get the errorcode 89 (Destination address required).
  So far this is what I tried, but nothing helped:</p>
  
  <ul>
  <li>recompiling newer/different versions of ACE</li>
  <li>modifying the code of test_udp_proactor, recreating a similar program</li>
  <li>changing the environment (different PC with 32bit CPU and Ubuntu 9.10)</li>
  </ul>
  
  <p>When using synchronous methods everything works just fine, so there is no error with the network hardware/software.</p>
  
  <p>I searched google and this site for hours/days now and it seems that nobody else has this problem! At least I can't find it.</p>
  
  <p>I am really frustrated now, because as far as I understand it, ACE is really mature and reliable. Though some people are very fond of the design of it.
  It is used in the aerospace community, where reliability and Real-Time aspects are a must!
  I can't believe ACE doesn't support asynch. UDP communication and/or nobody else found that out.</p>
  
  <p>Can somebody run a simple test for me with test_udp_proactor to verify this behavior?
  We have to use a real-time capable system, so windows is not an option...</p>
  
  <p>Any other hints and/or tips, preferably from the ACE-gurus ? :-)</p>
  
  <p>Thank you very much</p>