The following is a simple code chunk that should explain how to use the
TrystController class.



@interface TrystControllerDelegate : NSObject
{
  @private
  IBOutlet NSWindow	*window;	// the application window
  IBOutlet NSTableView	*tableView;	// table that displays found services
					// This table could then be used to
					// double click a service to
					// initiate a connection

  ...

  TrystController	*controller;
  NSFileHandle		*listeningSocket;

  NSArray		*foundServices;
}

...

@end


@implementation TrystControllerDelegate

...

- (void) awakeFromNib
{
  static BOOL
    beenHere = NO;
  NSSocketNativeHandle
    socket;
  NSNotificationCenter
    *nc = nil;

  // I've noticed that -awakeFromNib might get called several times.
  // Maybe I'm doing something wrong, but in any case, we want -awakeFromNib
  // to be called only once.

  if( beenHere ) return;
  beenHere = YES;

  foundServices = [[NSArray alloc] init];

  controller = [[TrystController alloc] initWithName: @"some name"
                                                type: @"_foobar._tcp."
                                                port: 12345];

  // Prepare the socket for possible connections

  socket = [[controller socket] socket];
  listeningSocket = [[NSFileHandle alloc] initWithFileDescriptor: socket];

  nc = [NSNotificationCenter defaultCenter];
  [nc addObserver: self
         selector: @selector(acceptConnection:)
             name: NSFileHandleConnectionAcceptedNotification
           object: listeningSocket];

  [controller setDelegate: self];
  [controller activateBrowsing: YES];	// start browsing for services
  [controller activatePublishing: YES];	// start publishing our service

  // Start to listen for connections

  [listeningSocket acceptConnectionInBackgroundAndNotify];

  [window center];
  [window makeKeyAndOrderFront: self];
}

...

- (void) discoveredServicesDidChange: (id) sender
{
  [foundServices autorelease];

  foundServices = [[controller discoveredServicesWithInfo] retain];
  [tableView reloadData];
}

- (int) numberOfRowsInTableView: (NSTableView *) tableView
{
  return [foundServices count];
}

- (id)            tableView: (NSTableView *) tableView
  objectValueForTableColumn: (NSTableColumn *) tableColumn
                        row: (int) row
{
  return [[foundServices objectAtIndex: row] valueForKey: [tableColumn identifier]];
}

...

@end