public synchronized FreerailsPrincipal getPrincipal(ConnectionToServer c) {
Player p;
if (c == null) {
/* No connection implies the principal is the server itself */
return Player.AUTHORITATIVE;
}
if ((p = (Player) principals.get(c)) == null) {
return Player.NOBODY;
}
return p.getPrincipal();
}
/**
* TODO deprecate strings in favour of certificates XXX currently we only support a single player
* per connection.
*
* @param player the player trying to connect
* @return true if the connection was successfully identified with the specified player
*/
public synchronized boolean addConnection(ConnectionToServer c, Player player, byte[] signature) {
logger.log(Level.INFO, "Authenticating player " + player.getName());
/* determine whether this identity already exists */
NonNullElements i =
new NonNullElements(KEY.PLAYERS, serverGameEngine.getWorld(), Player.AUTHORITATIVE);
while (i.next()) {
Player p = (Player) i.getElement();
if (p.getName().equals(player.getName())) {
/* this player already exists */
/* is this identity already connected ? */
if (principals.containsValue(p)) {
logger.log(Level.INFO, "Player " + p.getName() + " is already" + " connected");
return false;
}
/* is this player the same as the one which previously
* connected under the same name? */
logger.log(Level.FINE, "Verifying player " + p + " with " + player);
if (!p.verify(player, signature)) {
logger.log(Level.WARNING, "Couldn't verify signature of player " + p.getName());
return false;
}
principals.put(c, p);
/* set the connection world */
if (c instanceof LocalConnection) {
// don't create a WorldView, since the local client needs
// to synchronize against the world object itself.
c.setWorld(serverGameEngine.getWorld());
} else {
c.setWorld(new WorldView(serverGameEngine.getWorld(), p.getPrincipal()));
}
return true;
}
}
/* this player does not already exist */
logger.log(
Level.INFO, "Adding player " + player.getName() + " to " + serverGameEngine.getWorld());
MoveConfirmer mc =
new MoveConfirmer(serverGameEngine.getMoveExecuter(), serverGameEngine.getMoveChainFork());
AddPlayerMove m = new AddPlayerMove(serverGameEngine.getWorld(), player);
MoveStatus ms = mc.confirmMove(m, null);
assert ms == MoveStatus.MOVE_OK;
/*
* get the newly created player-with-principal
*/
World w = serverGameEngine.getWorld();
assert (w != null);
player =
(Player)
w.get(KEY.PLAYERS, w.size(KEY.PLAYERS, Player.AUTHORITATIVE) - 1, Player.AUTHORITATIVE);
principals.put(c, player);
/* Perform any moves necessary for adding a new player */
serverGameEngine
.getMoveExecuter()
.processMove(statGatherer.generateNewPlayerMove(player.getPrincipal()), c);
serverGameEngine
.getMoveExecuter()
.processMove(scenario.getSetupMoves(serverGameEngine.getWorld(), player.getPrincipal()), c);
/* set the connection world */
c.setWorld(new WorldView(serverGameEngine.getWorld(), player.getPrincipal()));
return true;
}