/**
* Sends a response packet from the server to the client.
*
* <p>Synchronized so that only one thread can send a client a message at a time.
*
* @param packet the response packet
*/
public synchronized void sendResponse(Packet packet) {
try {
session.getRemote().sendString(packet.getJson().toString());
} catch (IOException ioe) {
System.out.println(
"Sending response failed, session id = " + session.getRemoteAddress().toString());
}
}
/**
* Delivers a packet that was received from the client.
*
* @param packet the wrapper around the JSON object containing the message
*/
public void recvRequest(Packet packet) {
int suppliedId = packet.getPlayerId();
if (player == null && suppliedId != Packet.PLAYER_ID_NOT_LOGGED_IN) {
// impersonation attempt
throw new ClientModifiedException(
"hacking attempt detected: not logged in, but supplied id = " + packet.getPlayerId());
} else if (player != null && packet.getPlayerId() != player.getId()) {
// impersonation attempt
throw new ClientModifiedException(
"hacking attempt detected: wrong player id, is "
+ player.getId()
+ " but supplied "
+ packet.getPlayerId());
}
// passed the hacking checks, find the handler
String action = packet.getAction();
PacketHandler handler =
(player == null) ? packetHandlersNoAuth.get(action) : packetHandlers.get(action);
if (handler == null) {
throw new ClientModifiedException("hacking attempt detected: action = " + action);
}
// finally, handle the packet
handler.handlePacket(this, packet);
}