/** Starts the server, and waits for clients. */
public Server() {
instance = this;
System.out.println(
"== SERVER v" + Constants.NETCODE_VERSION + " == started at IP address: " + getLocalIP());
clients = new LinkedList<ClientMachine>();
try {
beginListening(Constants.DEFAULT_PORT);
} catch (BindException e) {
Main.fatalError(
"Couldn't bind to port "
+ Constants.DEFAULT_PORT
+ ". Perhaps a server is already running?\n\n"
+ e.getLocalizedMessage());
} catch (SocketException ex) {
ex.printStackTrace();
}
}
/**
* Called when we receive a packet from a client. Deciphers what the client is telling us, and
* responds.
*/
@Override
void parseReceived(DatagramPacket p) {
try {
// Ensure this client is on our register.
ClientMachine client = registerClient(new Machine(p.getAddress(), p.getPort()));
ByteInputStream in = new ByteInputStream(p.getData());
// Determine the type of message.
int command = in.readInt();
if ((command >= 0) && (command < Client.Message.values().length)) {
switch (Client.Message.values()[command]) {
// Client wants to join the game.
case CONNECT:
ByteOutputStream out = new ByteOutputStream();
// If he's using an older netcode version, slam the door in his face.
int version = in.readInt();
if (version < Constants.NETCODE_VERSION) {
out.writeInt(ServerCommands.Message.CONNECT_ERROR_OLDNETCODE.ordinal());
out.writeInt(Constants.NETCODE_VERSION);
sendPacket(client, out);
Main.log(
"Connection from "
+ client.toString()
+ " refused, using old version: "
+ version
+ ".",
800);
return;
}
Main.log("Connection from " + client.toString() + " accepted.");
// Spawn him in (so he'll be included in the update).
long id = Game.getInstance().addPlayer(in.readUTF(), new Color(in.readInt()));
// Send him a full update.
out.writeInt(ServerCommands.Message.FULL_UPDATE.ordinal());
Game.getInstance().flatten(out);
out.writeLong(id);
// Associate this client with the ship.
client.inGamePlayer = (Ship) Game.getInstance().getObjectManager().getObject(id);
// Waddle this fat packet out the door!
sendPacket(client, out);
// Tell everyone else about the player joining.
out = new ByteOutputStream();
out.writeInt(ServerCommands.Message.PLAYER_JOINED.ordinal());
client.inGamePlayer.flatten(out);
sendPacketToAllButOnePlayer(out, client);
break;
// Client is sending us a keystroke.
case KEYSTROKE:
if (!client.isInGame()) break;
int keyCode = in.readInt();
Game.getInstance()
.getActionManager()
.add(new Action(client.inGamePlayer, keyCode, Game.getInstance().timeStep + 2));
break;
// Client is telling us he's still here.
case PONG:
client.see();
break;
// Client wishes to resume life.
case QUITTING:
if (!client.isInGame()) break;
Game.getInstance().removePlayer(client.inGamePlayer);
// Tell everyone else.
out = new ByteOutputStream();
out.writeInt(ServerCommands.Message.PLAYER_QUIT.ordinal());
out.writeBoolean(false); // Not a timeout.
out.writeLong(client.inGamePlayer.getId());
sendPacketToAllButOnePlayer(out, client);
}
}
} catch (IOException ex) {
Main.fatalError("Server parsing exception.", ex);
}
}