Added an option to bind the datagram socket to a specific

hostname, in hopes of fixing the issue with receiving datagrams 
from the staging server.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@5793 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/presents/server/PresentsServer.java

@@ -154,11 +154,11 @@ public class PresentsServer
         _clmgr.setInjector(injector);
 
         // configure our connection manager
-        _conmgr.init(getListenPorts(), getDatagramPorts());
+        _conmgr.init(getListenPorts(), getDatagramPorts(), getDatagramHostname());
 
         // initialize the time base services
         TimeBaseProvider.init(_invmgr, _omgr);
-        
+
         // Make the client manager shut down before the invoker and dobj threads. This will help
         // application code to avoid long chains of shutdown constraints (e.g. msoy bureau manager).
         _shutmgr.addConstraint(
@@ -207,6 +207,15 @@ public class PresentsServer
         return Client.DEFAULT_DATAGRAM_PORTS;
     }
 
+    /**
+     * Returns the hostname for which the connection manager will listen for datagrams, or
+     * <code>null</code> to bind to the wildcard address.
+     */
+    protected String getDatagramHostname ()
+    {
+        return null;
+    }
+
     /**
      * Called once the invoker and distributed object manager have both completed processing all
      * remaining events and are fully shutdown. <em>Note:</em> this is called as the last act of

src/java/com/threerings/presents/server/net/ConnectionManager.java

@@ -109,9 +109,20 @@ public class ConnectionManager extends LoopingThread
      */
     public void init (int[] ports, int[] datagramPorts)
         throws IOException
+    {
+        init(ports, datagramPorts, null);
+    }
+
+    /**
+     * Constructs and initialized a connection manager (binding socket on which it will listen for
+     * client connections to each of the specified ports).
+     */
+    public void init (int[] ports, int[] datagramPorts, String datagramHostname)
+        throws IOException
     {
         _ports = ports;
         _datagramPorts = datagramPorts;
+        _datagramHostname = datagramHostname;
         _selector = SelectorProvider.provider().openSelector();
 
         // create our stats record
@@ -390,7 +401,8 @@ public class ConnectionManager extends LoopingThread
                 _datagramChannel = DatagramChannel.open();
                 _datagramChannel.configureBlocking(false);
 
-                InetSocketAddress isa = new InetSocketAddress(port);
+                InetSocketAddress isa = (_datagramHostname == null) ?
+                    new InetSocketAddress(port) : new InetSocketAddress(_datagramHostname, port);
                 _datagramChannel.socket().bind(isa);
                 registerChannel(_datagramChannel);
                 log.info("Server accepting datagrams on " + isa + ".");
@@ -1169,6 +1181,7 @@ public class ConnectionManager extends LoopingThread
     @Inject(optional=true) protected Authenticator _author = new DummyAuthenticator();
 
     protected int[] _ports, _datagramPorts;
+    protected String _datagramHostname;
     protected Selector _selector;
     protected ServerSocketChannel _ssocket;
     protected DatagramChannel _datagramChannel;