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Made the constructors for the different injectors more generic.

Browse Source 
We now use builders. This should make it simpler to introduce Netty
Spigot support.
This commit is contained in:
Kristian S. Stangeland 2013-02-04 22:42:07 +01:00
parent 7abfd2148e
commit 4685a06d27
7 changed files with 994 additions and 578 deletions
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23
ProtocolLib/src/main/java/com/comphenix/protocol/injector/PacketFilterManager.java
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@ -52,9 +52,10 @@ import com.comphenix.protocol.async.AsyncMarker;
import com.comphenix.protocol.error.ErrorReporter;
import com.comphenix.protocol.events.*;
import com.comphenix.protocol.injector.packet.PacketInjector;
import com.comphenix.protocol.injector.packet.InjectorFactory;
import com.comphenix.protocol.injector.packet.PacketInjectorBuilder;
import com.comphenix.protocol.injector.packet.PacketRegistry;
import com.comphenix.protocol.injector.player.PlayerInjectionHandler;
import com.comphenix.protocol.injector.player.PlayerInjectorBuilder;
import com.comphenix.protocol.reflect.FieldAccessException;
import com.comphenix.protocol.reflect.FuzzyReflection;
import com.comphenix.protocol.utility.MinecraftReflection;
@ -181,10 +182,22 @@ public final class PacketFilterManager implements ProtocolManager, ListenerInvok
try {
// Initialize injection mangers
this.playerInjection = new PlayerInjectionHandler(
classLoader, reporter, isInjectionNecessary, this, packetListeners, server);
this.packetInjector = InjectorFactory.getInstance().createProxyInjector(
classLoader, this, playerInjection, reporter);
this.playerInjection = PlayerInjectorBuilder.newBuilder().
invoker(this).
server(server).
reporter(reporter).
classLoader(classLoader).
packetListeners(packetListeners).
injectionFilter(isInjectionNecessary).
buildHandler();
this.packetInjector = PacketInjectorBuilder.newBuilder().
invoker(this).
reporter(reporter).
classLoader(classLoader).
playerInjection(playerInjection).
buildInjector();
this.asyncFilterManager = new AsyncFilterManager(reporter, server.getScheduler(), this);
// Attempt to load the list of server and client packets

42
ProtocolLib/src/main/java/com/comphenix/protocol/injector/packet/InjectorFactory.java
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@ -1,42 +0,0 @@
package com.comphenix.protocol.injector.packet;
import com.comphenix.protocol.error.ErrorReporter;
import com.comphenix.protocol.injector.ListenerInvoker;
import com.comphenix.protocol.injector.player.PlayerInjectionHandler;
/**
* A singleton factory for creating incoming packet injectors.
*
* @author Kristian
*/
public class InjectorFactory {
private static final InjectorFactory INSTANCE = new InjectorFactory();
private InjectorFactory() {
// No need to construct this
}
/**
* Retrieve the factory singleton.
* @return Factory singleton.
*/
public static InjectorFactory getInstance() {
return INSTANCE;
}
/**
* Create a packet injector that intercepts packets by overriding the packet registry.
* @param classLoader - current class loader.
* @param manager - packet invoker.
* @param playerInjection - to lookup Player by DataInputStream.
* @param reporter - error reporter.
* @return A packet injector with these features.
* @throws IllegalAccessException If we fail to create the injector.
*/
public PacketInjector createProxyInjector(
ClassLoader classLoader, ListenerInvoker manager,
PlayerInjectionHandler playerInjection, ErrorReporter reporter) throws IllegalAccessException {
return new ProxyPacketInjector(classLoader, manager, playerInjection, reporter);
}
}

109
ProtocolLib/src/main/java/com/comphenix/protocol/injector/packet/PacketInjectorBuilder.java Normal file
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@ -0,0 +1,109 @@
package com.comphenix.protocol.injector.packet;
import javax.annotation.Nonnull;
import com.comphenix.protocol.ProtocolLibrary;
import com.comphenix.protocol.ProtocolManager;
import com.comphenix.protocol.error.ErrorReporter;
import com.comphenix.protocol.injector.ListenerInvoker;
import com.comphenix.protocol.injector.PacketFilterManager;
import com.comphenix.protocol.injector.player.PlayerInjectionHandler;
import com.google.common.base.Preconditions;
/**
* A builder responsible for creating incoming packet injectors.
*
* @author Kristian
*/
public class PacketInjectorBuilder {
protected PacketInjectorBuilder() {
// No need to construct this
}
/**
* Retrieve a new packet injector builder.
* @return Injector builder.
*/
public static PacketInjectorBuilder newBuilder() {
return new PacketInjectorBuilder();
}
protected ClassLoader classLoader;
protected ListenerInvoker invoker;
protected ErrorReporter reporter;
protected PlayerInjectionHandler playerInjection;
/**
* Set the class loader to use during class generation.
* @param classLoader - new class loader.
* @return This builder, for chaining.
*/
public PacketInjectorBuilder classLoader(@Nonnull ClassLoader classLoader) {
Preconditions.checkNotNull(classLoader, "classLoader cannot be NULL");
this.classLoader = classLoader;
return this;
}
/**
* The error reporter used by the created injector.
* @param reporter - new error reporter.
* @return This builder, for chaining.
*/
public PacketInjectorBuilder reporter(@Nonnull ErrorReporter reporter) {
Preconditions.checkNotNull(reporter, "reporter cannot be NULL");
this.reporter = reporter;
return this;
}
/**
* The packet stream invoker.
* @param invoker - the invoker.
* @return This builder, for chaining.
*/
public PacketInjectorBuilder invoker(@Nonnull ListenerInvoker invoker) {
Preconditions.checkNotNull(invoker, "invoker cannot be NULL");
this.invoker = invoker;
return this;
}
/**
* The packet stream invoker.
* @param invoker - the invoker.
* @return This builder, for chaining.
*/
@Nonnull
public PacketInjectorBuilder playerInjection(@Nonnull PlayerInjectionHandler playerInjection) {
Preconditions.checkNotNull(playerInjection, "playerInjection cannot be NULL");
this.playerInjection = playerInjection;
return this;
}
/**
* Called before an object is created with this builder.
*/
private void initializeDefaults() {
ProtocolManager manager = ProtocolLibrary.getProtocolManager();
// Initialize with default values if we can
if (classLoader == null)
classLoader = this.getClass().getClassLoader();
if (reporter == null)
reporter = ProtocolLibrary.getErrorReporter();
if (invoker == null)
invoker = (PacketFilterManager) manager;
if (playerInjection == null)
throw new IllegalStateException("Player injection parameter must be initialized.");
}
/**
* Create a packet injector using the provided fields or the default values.
* <p>
* Note that any non-null builder parameters must be set.
* @return The created injector.
* @throws IllegalAccessException If anything goes wrong in terms of reflection.
*/
public PacketInjector buildInjector() throws IllegalAccessException {
initializeDefaults();
return new ProxyPacketInjector(classLoader, invoker, playerInjection, reporter);
}
}

4
ProtocolLib/src/main/java/com/comphenix/protocol/injector/player/NetLoginInjector.java
View File

@ -38,7 +38,7 @@ class NetLoginInjector {
private ConcurrentMap<Object, PlayerInjector> injectedLogins = Maps.newConcurrentMap();
// Handles every hook
private PlayerInjectionHandler injectionHandler;
private ProxyPlayerInjectionHandler injectionHandler;
private Server server;
// The current error rerporter
@ -47,7 +47,7 @@ class NetLoginInjector {
// Used to create fake players
private TemporaryPlayerFactory tempPlayerFactory = new TemporaryPlayerFactory();
public NetLoginInjector(ErrorReporter reporter, PlayerInjectionHandler injectionHandler, Server server) {
public NetLoginInjector(ErrorReporter reporter, ProxyPlayerInjectionHandler injectionHandler, Server server) {
this.reporter = reporter;
this.injectionHandler = injectionHandler;
this.server = server;

571
ProtocolLib/src/main/java/com/comphenix/protocol/injector/player/PlayerInjectionHandler.java
View File

@ -1,211 +1,66 @@
/*
* ProtocolLib - Bukkit server library that allows access to the Minecraft protocol.
* Copyright (C) 2012 Kristian S. Stangeland
*
* This program is free software; you can redistribute it and/or modify it under the terms of the
* GNU General Public License as published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this program;
* if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307 USA
*/
package com.comphenix.protocol.injector.player;
import java.io.DataInputStream;
import java.lang.reflect.InvocationTargetException;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketAddress;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import org.bukkit.Server;
import org.bukkit.entity.Player;
import com.comphenix.protocol.concurrency.BlockingHashMap;
import com.comphenix.protocol.error.ErrorReporter;
import com.comphenix.protocol.events.PacketAdapter;
import com.comphenix.protocol.events.PacketContainer;
import com.comphenix.protocol.events.PacketListener;
import com.comphenix.protocol.injector.GamePhase;
import com.comphenix.protocol.injector.ListenerInvoker;
import com.comphenix.protocol.injector.PlayerLoggedOutException;
import com.comphenix.protocol.injector.PacketFilterManager.PlayerInjectHooks;
import com.comphenix.protocol.injector.player.TemporaryPlayerFactory.InjectContainer;
import com.google.common.base.Predicate;
import com.google.common.collect.Maps;
/**
* Responsible for injecting into a player's sendPacket method.
*
* @author Kristian
*/
public class PlayerInjectionHandler {
/**
* The maximum number of milliseconds to wait until a player can be looked up by connection.
*/
private static final long TIMEOUT_PLAYER_LOOKUP = 2000; // ms
/**
* The highest possible packet ID. It's unlikely that this value will ever change.
*/
private static final int MAXIMUM_PACKET_ID = 255;
// Server connection injection
private InjectedServerConnection serverInjection;
// NetLogin injector
private NetLoginInjector netLoginInjector;
// The last successful player hook
private PlayerInjector lastSuccessfulHook;
// Player injection
private Map<SocketAddress, PlayerInjector> addressLookup = Maps.newConcurrentMap();
private Map<Player, PlayerInjector> playerInjection = Maps.newConcurrentMap();
// Lookup player by connection
private BlockingHashMap<DataInputStream, PlayerInjector> dataInputLookup = BlockingHashMap.create();
// Player injection types
private volatile PlayerInjectHooks loginPlayerHook = PlayerInjectHooks.NETWORK_SERVER_OBJECT;
private volatile PlayerInjectHooks playingPlayerHook = PlayerInjectHooks.NETWORK_SERVER_OBJECT;
// Error reporter
private ErrorReporter reporter;
// Whether or not we're closing
private boolean hasClosed;
// Used to invoke events
private ListenerInvoker invoker;
// Enabled packet filters
private IntegerSet sendingFilters = new IntegerSet(MAXIMUM_PACKET_ID + 1);
// List of packet listeners
private Set<PacketListener> packetListeners;
// The class loader we're using
private ClassLoader classLoader;
// Used to filter injection attempts
private Predicate<GamePhase> injectionFilter;
public PlayerInjectionHandler(ClassLoader classLoader, ErrorReporter reporter, Predicate<GamePhase> injectionFilter,
ListenerInvoker invoker, Set<PacketListener> packetListeners, Server server) {
this.classLoader = classLoader;
this.reporter = reporter;
this.invoker = invoker;
this.injectionFilter = injectionFilter;
this.packetListeners = packetListeners;
this.netLoginInjector = new NetLoginInjector(reporter, this, server);
this.serverInjection = new InjectedServerConnection(reporter, server, netLoginInjector);
serverInjection.injectList();
}
public interface PlayerInjectionHandler {
/**
* Retrieves how the server packets are read.
* @return Injection method for reading server packets.
*/
public PlayerInjectHooks getPlayerHook() {
return getPlayerHook(GamePhase.PLAYING);
}
public abstract PlayerInjectHooks getPlayerHook();
/**
* Retrieves how the server packets are read.
* @param phase - the current game phase.
* @return Injection method for reading server packets.
*/
public PlayerInjectHooks getPlayerHook(GamePhase phase) {
switch (phase) {
case LOGIN:
return loginPlayerHook;
case PLAYING:
return playingPlayerHook;
default:
throw new IllegalArgumentException("Cannot retrieve injection hook for both phases at the same time.");
}
}
public abstract PlayerInjectHooks getPlayerHook(GamePhase phase);
/**
* Sets how the server packets are read.
* @param playerHook - the new injection method for reading server packets.
*/
public void setPlayerHook(PlayerInjectHooks playerHook) {
setPlayerHook(GamePhase.PLAYING, playerHook);
}
public abstract void setPlayerHook(PlayerInjectHooks playerHook);
/**
* Sets how the server packets are read.
* @param phase - the current game phase.
* @param playerHook - the new injection method for reading server packets.
*/
public void setPlayerHook(GamePhase phase, PlayerInjectHooks playerHook) {
if (phase.hasLogin())
loginPlayerHook = playerHook;
if (phase.hasPlaying())
playingPlayerHook = playerHook;
// Make sure the current listeners are compatible
checkListener(packetListeners);
}
public abstract void setPlayerHook(GamePhase phase, PlayerInjectHooks playerHook);
/**
* Add an underlying packet handler of the given ID.
* @param packetID - packet ID to register.
*/
public void addPacketHandler(int packetID) {
sendingFilters.add(packetID);
}
public abstract void addPacketHandler(int packetID);
/**
* Remove an underlying packet handler of ths ID.
* @param packetID - packet ID to unregister.
*/
public void removePacketHandler(int packetID) {
sendingFilters.remove(packetID);
}
public abstract void removePacketHandler(int packetID);
/**
* Used to construct a player hook.
* @param player - the player to hook.
* @param hook - the hook type.
* @return A new player hoook
* @throws IllegalAccessException Unable to do our reflection magic.
*/
private PlayerInjector getHookInstance(Player player, PlayerInjectHooks hook) throws IllegalAccessException {
// Construct the correct player hook
switch (hook) {
case NETWORK_HANDLER_FIELDS:
return new NetworkFieldInjector(classLoader, reporter, player, invoker, sendingFilters);
case NETWORK_MANAGER_OBJECT:
return new NetworkObjectInjector(classLoader, reporter, player, invoker, sendingFilters);
case NETWORK_SERVER_OBJECT:
return new NetworkServerInjector(classLoader, reporter, player, invoker, sendingFilters, serverInjection);
default:
throw new IllegalArgumentException("Cannot construct a player injector.");
}
}
/**
* Retrieve a player by its DataInput connection.
* @param inputStream - the associated DataInput connection.
* @return The player.
* @throws InterruptedException If the thread was interrupted during the wait.
*/
public Player getPlayerByConnection(DataInputStream inputStream) throws InterruptedException {
return getPlayerByConnection(inputStream, TIMEOUT_PLAYER_LOOKUP, TimeUnit.MILLISECONDS);
}
public abstract Player getPlayerByConnection(DataInputStream inputStream)
throws InterruptedException;
/**
* Retrieve a player by its DataInput connection.
* @param inputStream - the associated DataInput connection.
@ -214,243 +69,44 @@ public class PlayerInjectionHandler {
* @return The player.
* @throws InterruptedException If the thread was interrupted during the wait.
*/
public Player getPlayerByConnection(DataInputStream inputStream, long playerTimeout, TimeUnit unit) throws InterruptedException {
// Wait until the connection owner has been established
PlayerInjector injector = dataInputLookup.get(inputStream, playerTimeout, unit);
if (injector != null) {
return injector.getPlayer();
} else {
reporter.reportWarning(this, "Unable to find stream: " + inputStream);
return null;
}
}
/**
* Helper function that retrieves the injector type of a given player injector.
* @param injector - injector type.
* @return The injector type.
*/
private PlayerInjectHooks getInjectorType(PlayerInjector injector) {
return injector != null ? injector.getHookType() : PlayerInjectHooks.NONE;
}
public abstract Player getPlayerByConnection(DataInputStream inputStream, long playerTimeout, TimeUnit unit) throws InterruptedException;
/**
* Initialize a player hook, allowing us to read server packets.
* <p>
* This call will be ignored if there's no listener that can receive the given events.
* @param player - player to hook.
*/
public void injectPlayer(Player player) {
// Inject using the player instance itself
if (isInjectionNecessary(GamePhase.PLAYING)) {
injectPlayer(player, player, GamePhase.PLAYING);
}
}
public abstract void injectPlayer(Player player);
/**
* Determine if it's truly necessary to perform the given player injection.
* @param phase - current game phase.
* @return TRUE if we should perform the injection, FALSE otherwise.
*/
public boolean isInjectionNecessary(GamePhase phase) {
return injectionFilter.apply(phase);
}
/**
* Initialize a player hook, allowing us to read server packets.
* <p>
* This method will always perform the instructed injection.
*
* @param player - player to hook.
* @param injectionPoint - the object to use during the injection process.
* @param phase - the current game phase.
* @return The resulting player injector, or NULL if the injection failed.
*/
PlayerInjector injectPlayer(Player player, Object injectionPoint, GamePhase phase) {
// Unfortunately, due to NetLoginHandler, multiple threads may potentially call this method.
synchronized (player) {
return injectPlayerInternal(player, injectionPoint, phase);
}
}
// Unsafe variant of the above
private PlayerInjector injectPlayerInternal(Player player, Object injectionPoint, GamePhase phase) {
PlayerInjector injector = playerInjection.get(player);
PlayerInjectHooks tempHook = getPlayerHook(phase);
PlayerInjectHooks permanentHook = tempHook;
// The given player object may be fake, so be careful!
// See if we need to inject something else
boolean invalidInjector = injector != null ? !injector.canInject(phase) : true;
public abstract boolean isInjectionNecessary(GamePhase phase);
// Don't inject if the class has closed
if (!hasClosed && player != null && (tempHook != getInjectorType(injector) || invalidInjector)) {
while (tempHook != PlayerInjectHooks.NONE) {
// Whether or not the current hook method failed completely
boolean hookFailed = false;
// Remove the previous hook, if any
cleanupHook(injector);
try {
injector = getHookInstance(player, tempHook);
// Make sure this injection method supports the current game phase
if (injector.canInject(phase)) {
injector.initialize(injectionPoint);
DataInputStream inputStream = injector.getInputStream(false);
Socket socket = injector.getSocket();
SocketAddress address = socket != null ? socket.getRemoteSocketAddress() : null;
// Guard against NPE here too
PlayerInjector previous = address != null ? addressLookup.get(address) : null;
// Close any previously associated hooks before we proceed
if (previous != null) {
uninjectPlayer(previous.getPlayer(), false, true);
}
injector.injectManager();
if (inputStream != null)
dataInputLookup.put(inputStream, injector);
if (address != null)
addressLookup.put(address, injector);
break;
}
} catch (PlayerLoggedOutException e) {
throw e;
} catch (Exception e) {
// Mark this injection attempt as a failure
reporter.reportDetailed(this, "Player hook " + tempHook.toString() + " failed.",
e, player, injectionPoint, phase);
hookFailed = true;
}
// Choose the previous player hook type
tempHook = PlayerInjectHooks.values()[tempHook.ordinal() - 1];
if (hookFailed)
reporter.reportWarning(this, "Switching to " + tempHook.toString() + " instead.");
// Check for UTTER FAILURE
if (tempHook == PlayerInjectHooks.NONE) {
cleanupHook(injector);
injector = null;
hookFailed = true;
}
// Should we set the default hook method too?
if (hookFailed) {
permanentHook = tempHook;
}
}
// Update values
if (injector != null)
lastSuccessfulHook = injector;
if (permanentHook != getPlayerHook(phase))
setPlayerHook(phase, tempHook);
// Save injector
if (injector != null) {
playerInjection.put(player, injector);
}
}
return injector;
}
private void cleanupHook(PlayerInjector injector) {
// Clean up as much as possible
try {
if (injector != null)
injector.cleanupAll();
} catch (Exception ex) {
reporter.reportDetailed(this, "Cleaing up after player hook failed.", ex, injector);
}
}
/**
* Invoke special routines for handling disconnect before a player is uninjected.
* @param player - player to process.
*/
public void handleDisconnect(Player player) {
PlayerInjector injector = getInjector(player);
if (injector != null) {
injector.handleDisconnect();
}
}
public abstract void handleDisconnect(Player player);
/**
* Unregisters the given player.
* @param player - player to unregister.
* @return TRUE if a player has been uninjected, FALSE otherwise.
*/
public boolean uninjectPlayer(Player player) {
return uninjectPlayer(player, true, false);
}
public abstract boolean uninjectPlayer(Player player);
/**
* Unregisters the given player.
* @param player - player to unregister.
* @param removeAuxiliary - TRUE to remove auxiliary information, such as input stream and address.
* @return TRUE if a player has been uninjected, FALSE otherwise.
*/
public boolean uninjectPlayer(Player player, boolean removeAuxiliary) {
return uninjectPlayer(player, removeAuxiliary, false);
}
/**
* Unregisters the given player.
* @param player - player to unregister.
* @param removeAuxiliary - TRUE to remove auxiliary information, such as input stream and address.
* @param prepareNextHook - whether or not we need to fix any lingering hooks.
* @return TRUE if a player has been uninjected, FALSE otherwise.
*/
private boolean uninjectPlayer(Player player, boolean removeAuxiliary, boolean prepareNextHook) {
if (!hasClosed && player != null) {
PlayerInjector injector = playerInjection.remove(player);
public abstract boolean uninjectPlayer(Player player, boolean removeAuxiliary);
if (injector != null) {
InetSocketAddress address = player.getAddress();
injector.cleanupAll();
// Remove the "hooked" network manager in our instance as well
if (prepareNextHook && injector instanceof NetworkObjectInjector) {
try {
PlayerInjector dummyInjector = getHookInstance(player, PlayerInjectHooks.NETWORK_SERVER_OBJECT);
dummyInjector.initializePlayer(player);
dummyInjector.setNetworkManager(injector.getNetworkManager(), true);
} catch (IllegalAccessException e) {
// Let the user know
reporter.reportWarning(this, "Unable to fully revert old injector. May cause conflicts.", e);
}
}
// Clean up
if (removeAuxiliary) {
// Note that the dataInputLookup will clean itself
if (address != null)
addressLookup.remove(address);
}
return true;
}
}
return false;
}
/**
* Unregisters a player by the given address.
* <p>
@ -460,19 +116,8 @@ public class PlayerInjectionHandler {
* @param address - address of the player to unregister.
* @return TRUE if a player has been uninjected, FALSE otherwise.
*/
public boolean uninjectPlayer(InetSocketAddress address) {
if (!hasClosed && address != null) {
PlayerInjector injector = addressLookup.get(address);
// Clean up
if (injector != null)
uninjectPlayer(injector.getPlayer(), false, true);
return true;
}
return false;
}
public abstract boolean uninjectPlayer(InetSocketAddress address);
/**
* Send the given packet to the given reciever.
* @param reciever - the player receiver.
@ -480,20 +125,9 @@ public class PlayerInjectionHandler {
* @param filters - whether or not to invoke the packet filters.
* @throws InvocationTargetException If an error occured during sending.
*/
public void sendServerPacket(Player reciever, PacketContainer packet, boolean filters) throws InvocationTargetException {
PlayerInjector injector = getInjector(reciever);
// Send the packet, or drop it completely
if (injector != null) {
injector.sendServerPacket(packet.getHandle(), filters);
} else {
throw new PlayerLoggedOutException(String.format(
"Unable to send packet %s (%s): Player %s has logged out.",
packet.getID(), packet, reciever.getName()
));
}
}
public abstract void sendServerPacket(Player reciever, PacketContainer packet, boolean filters)
throws InvocationTargetException;
/**
* Process a packet as if it were sent by the given player.
* @param player - the sender.
@ -501,158 +135,37 @@ public class PlayerInjectionHandler {
* @throws IllegalAccessException If the reflection machinery failed.
* @throws InvocationTargetException If the underlying method caused an error.
*/
public void processPacket(Player player, Object mcPacket) throws IllegalAccessException, InvocationTargetException {
PlayerInjector injector = getInjector(player);
// Process the given packet, or simply give up
if (injector != null)
injector.processPacket(mcPacket);
else
throw new PlayerLoggedOutException(String.format(
"Unable to receieve packet %s. Player %s has logged out.",
mcPacket, player.getName()
));
}
/**
* Retrieve the injector associated with this player.
* @param player - the player to find.
* @return The injector, or NULL if not found.
*/
private PlayerInjector getInjector(Player player) {
PlayerInjector injector = playerInjection.get(player);
if (injector == null) {
// Try getting it from the player itself
if (player instanceof InjectContainer)
return ((InjectContainer) player).getInjector();
else
return searchAddressLookup(player);
} else {
return injector;
}
}
/**
* Find an injector by looking through the address map.
* @param player - player to find.
* @return The injector, or NULL if not found.
*/
private PlayerInjector searchAddressLookup(Player player) {
// See if we can find it anywhere
for (PlayerInjector injector : addressLookup.values()) {
if (player.equals(injector.getUpdatedPlayer())) {
return injector;
}
}
return null;
}
/**
* Retrieve a player injector by looking for its NetworkManager.
* @param networkManager - current network manager.
* @return Related player injector.
*/
PlayerInjector getInjectorByNetworkHandler(Object networkManager) {
// That's not legal
if (networkManager == null)
return null;
// O(n) is okay in this instance. This is only a backup solution.
for (PlayerInjector injector : playerInjection.values()) {
if (injector.getNetworkManager() == networkManager)
return injector;
}
// None found
return null;
}
public abstract void processPacket(Player player, Object mcPacket)
throws IllegalAccessException, InvocationTargetException;
/**
* Determine if the given listeners are valid.
* @param listeners - listeners to check.
*/
public void checkListener(Set<PacketListener> listeners) {
// Make sure the current listeners are compatible
if (lastSuccessfulHook != null) {
for (PacketListener listener : listeners) {
checkListener(listener);
}
}
}
public abstract void checkListener(Set<PacketListener> listeners);
/**
* Determine if a listener is valid or not.
* <p>
* If not, a warning will be printed to the console.
* @param listener - listener to check.
*/
public void checkListener(PacketListener listener) {
if (lastSuccessfulHook != null) {
UnsupportedListener result = lastSuccessfulHook.checkListener(listener);
public abstract void checkListener(PacketListener listener);
// We won't prevent the listener, as it may still have valid packets
if (result != null) {
reporter.reportWarning(this, "Cannot fully register listener for " +
PacketAdapter.getPluginName(listener) + ": " + result.toString());
// These are illegal
for (int packetID : result.getPackets())
removePacketHandler(packetID);
}
}
}
/**
* Retrieve the current list of registered sending listeners.
* @return List of the sending listeners's packet IDs.
*/
public Set<Integer> getSendingFilters() {
return sendingFilters.toSet();
}
public void close() {
// Guard
if (hasClosed || playerInjection == null)
return;
public abstract Set<Integer> getSendingFilters();
// Remove everything
for (PlayerInjector injection : playerInjection.values()) {
if (injection != null) {
injection.cleanupAll();
}
}
// Remove server handler
if (serverInjection != null)
serverInjection.cleanupAll();
if (netLoginInjector != null)
netLoginInjector.cleanupAll();
serverInjection = null;
netLoginInjector = null;
hasClosed = true;
playerInjection.clear();
addressLookup.clear();
invoker = null;
}
/**
* Close any lingering proxy injections.
*/
public abstract void close();
/**
* Inform the current PlayerInjector that it should update the DataInputStream next.
* @param player - the player to update.
*/
public void scheduleDataInputRefresh(Player player) {
final PlayerInjector injector = getInjector(player);
// Update the DataInputStream
if (injector != null) {
injector.scheduleAction(new Runnable() {
@Override
public void run() {
dataInputLookup.put(injector.getInputStream(false), injector);
}
});
}
}
}
public abstract void scheduleDataInputRefresh(Player player);
}

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package com.comphenix.protocol.injector.player;
import java.util.Set;
import javax.annotation.Nonnull;
import org.bukkit.Bukkit;
import org.bukkit.Server;
import com.comphenix.protocol.ProtocolLibrary;
import com.comphenix.protocol.ProtocolManager;
import com.comphenix.protocol.error.ErrorReporter;
import com.comphenix.protocol.events.PacketListener;
import com.comphenix.protocol.injector.GamePhase;
import com.comphenix.protocol.injector.ListenerInvoker;
import com.comphenix.protocol.injector.PacketFilterManager;
import com.google.common.base.Preconditions;
import com.google.common.base.Predicate;
/**
* Constructor for different player injectors.
*
* @author Kristian
*/
public class PlayerInjectorBuilder {
public static PlayerInjectorBuilder newBuilder() {
return new PlayerInjectorBuilder();
}
protected PlayerInjectorBuilder() {
// Use the static method.
}
protected ClassLoader classLoader;
protected ErrorReporter reporter;
protected Predicate<GamePhase> injectionFilter;
protected ListenerInvoker invoker;
protected Set<PacketListener> packetListeners;
protected Server server;
/**
* Set the class loader to use during class generation.
* @param classLoader - new class loader.
* @return This builder, for chaining.
*/
public PlayerInjectorBuilder classLoader(@Nonnull ClassLoader classLoader) {
Preconditions.checkNotNull(classLoader, "classLoader cannot be NULL");
this.classLoader = classLoader;
return this;
}
/**
* The error reporter used by the created injector.
* @param reporter - new error reporter.
* @return This builder, for chaining.
*/
public PlayerInjectorBuilder reporter(@Nonnull ErrorReporter reporter) {
Preconditions.checkNotNull(reporter, "reporter cannot be NULL");
this.reporter = reporter;
return this;
}
/**
* The injection filter that is used to determine if it is necessary to perform
* injection during a certain phase.
* @param injectionFilter - filter predicate.
* @return This builder, for chaining.
*/
@Nonnull
public PlayerInjectorBuilder injectionFilter(@Nonnull Predicate<GamePhase> injectionFilter) {
Preconditions.checkNotNull(injectionFilter, "injectionFilter cannot be NULL");
this.injectionFilter = injectionFilter;
return this;
}
/**
* The packet stream invoker.
* @param invoker - the invoker.
* @return This builder, for chaining.
*/
public PlayerInjectorBuilder invoker(@Nonnull ListenerInvoker invoker) {
Preconditions.checkNotNull(invoker, "invoker cannot be NULL");
this.invoker = invoker;
return this;
}
/**
* Set the set of packet listeners.
* @param packetListeners - packet listeners.
* @return This builder, for chaining.
*/
@Nonnull
public PlayerInjectorBuilder packetListeners(@Nonnull Set<PacketListener> packetListeners) {
Preconditions.checkNotNull(packetListeners, "packetListeners cannot be NULL");
this.packetListeners = packetListeners;
return this;
}
/**
* Set the Bukkit server used for scheduling.
* @param server - the Bukkit server.
* @return This builder, for chaining.
*/
public PlayerInjectorBuilder server(@Nonnull Server server) {
Preconditions.checkNotNull(server, "server cannot be NULL");
this.server = server;
return this;
}
/**
* Called before an object is created with this builder.
*/
private void initializeDefaults() {
ProtocolManager manager = ProtocolLibrary.getProtocolManager();
// Initialize with default values if we can
if (classLoader == null)
classLoader = this.getClass().getClassLoader();
if (reporter == null)
reporter = ProtocolLibrary.getErrorReporter();
if (invoker == null)
invoker = (PacketFilterManager) manager;
if (server == null)
server = Bukkit.getServer();
if (injectionFilter == null)
throw new IllegalStateException("injectionFilter must be initialized.");
if (packetListeners == null)
throw new IllegalStateException("packetListeners must be initialized.");
}
/**
* Construct the injection handler.
* <p>
* Any builder parameter marked as NON-NULL is essential and must be initialized.
* @return The constructed injection handler using the current parameters.
*/
public PlayerInjectionHandler buildHandler() {
// Fill any default fields
initializeDefaults();
return new ProxyPlayerInjectionHandler(classLoader, reporter, injectionFilter, invoker,
packetListeners, server);
}
}

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/*
* ProtocolLib - Bukkit server library that allows access to the Minecraft protocol.
* Copyright (C) 2012 Kristian S. Stangeland
*
* This program is free software; you can redistribute it and/or modify it under the terms of the
* GNU General Public License as published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this program;
* if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307 USA
*/
package com.comphenix.protocol.injector.player;
import java.io.DataInputStream;
import java.lang.reflect.InvocationTargetException;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketAddress;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import org.bukkit.Server;
import org.bukkit.entity.Player;
import com.comphenix.protocol.concurrency.BlockingHashMap;
import com.comphenix.protocol.error.ErrorReporter;
import com.comphenix.protocol.events.PacketAdapter;
import com.comphenix.protocol.events.PacketContainer;
import com.comphenix.protocol.events.PacketListener;
import com.comphenix.protocol.injector.GamePhase;
import com.comphenix.protocol.injector.ListenerInvoker;
import com.comphenix.protocol.injector.PlayerLoggedOutException;
import com.comphenix.protocol.injector.PacketFilterManager.PlayerInjectHooks;
import com.comphenix.protocol.injector.player.TemporaryPlayerFactory.InjectContainer;
import com.google.common.base.Predicate;
import com.google.common.collect.Maps;
/**
* Responsible for injecting into a player's sendPacket method.
*
* @author Kristian
*/
class ProxyPlayerInjectionHandler implements PlayerInjectionHandler {
/**
* The maximum number of milliseconds to wait until a player can be looked up by connection.
*/
private static final long TIMEOUT_PLAYER_LOOKUP = 2000; // ms
/**
* The highest possible packet ID. It's unlikely that this value will ever change.
*/
private static final int MAXIMUM_PACKET_ID = 255;
// Server connection injection
private InjectedServerConnection serverInjection;
// NetLogin injector
private NetLoginInjector netLoginInjector;
// The last successful player hook
private PlayerInjector lastSuccessfulHook;
// Player injection
private Map<SocketAddress, PlayerInjector> addressLookup = Maps.newConcurrentMap();
private Map<Player, PlayerInjector> playerInjection = Maps.newConcurrentMap();
// Lookup player by connection
private BlockingHashMap<DataInputStream, PlayerInjector> dataInputLookup = BlockingHashMap.create();
// Player injection types
private volatile PlayerInjectHooks loginPlayerHook = PlayerInjectHooks.NETWORK_SERVER_OBJECT;
private volatile PlayerInjectHooks playingPlayerHook = PlayerInjectHooks.NETWORK_SERVER_OBJECT;
// Error reporter
private ErrorReporter reporter;
// Whether or not we're closing
private boolean hasClosed;
// Used to invoke events
private ListenerInvoker invoker;
// Enabled packet filters
private IntegerSet sendingFilters = new IntegerSet(MAXIMUM_PACKET_ID + 1);
// List of packet listeners
private Set<PacketListener> packetListeners;
// The class loader we're using
private ClassLoader classLoader;
// Used to filter injection attempts
private Predicate<GamePhase> injectionFilter;
public ProxyPlayerInjectionHandler(ClassLoader classLoader, ErrorReporter reporter, Predicate<GamePhase> injectionFilter,
ListenerInvoker invoker, Set<PacketListener> packetListeners, Server server) {
this.classLoader = classLoader;
this.reporter = reporter;
this.invoker = invoker;
this.injectionFilter = injectionFilter;
this.packetListeners = packetListeners;
this.netLoginInjector = new NetLoginInjector(reporter, this, server);
this.serverInjection = new InjectedServerConnection(reporter, server, netLoginInjector);
serverInjection.injectList();
}
/**
* Retrieves how the server packets are read.
* @return Injection method for reading server packets.
*/
@Override
public PlayerInjectHooks getPlayerHook() {
return getPlayerHook(GamePhase.PLAYING);
}
/**
* Retrieves how the server packets are read.
* @param phase - the current game phase.
* @return Injection method for reading server packets.
*/
@Override
public PlayerInjectHooks getPlayerHook(GamePhase phase) {
switch (phase) {
case LOGIN:
return loginPlayerHook;
case PLAYING:
return playingPlayerHook;
default:
throw new IllegalArgumentException("Cannot retrieve injection hook for both phases at the same time.");
}
}
/**
* Sets how the server packets are read.
* @param playerHook - the new injection method for reading server packets.
*/
@Override
public void setPlayerHook(PlayerInjectHooks playerHook) {
setPlayerHook(GamePhase.PLAYING, playerHook);
}
/**
* Sets how the server packets are read.
* @param phase - the current game phase.
* @param playerHook - the new injection method for reading server packets.
*/
@Override
public void setPlayerHook(GamePhase phase, PlayerInjectHooks playerHook) {
if (phase.hasLogin())
loginPlayerHook = playerHook;
if (phase.hasPlaying())
playingPlayerHook = playerHook;
// Make sure the current listeners are compatible
checkListener(packetListeners);
}
/**
* Add an underlying packet handler of the given ID.
* @param packetID - packet ID to register.
*/
@Override
public void addPacketHandler(int packetID) {
sendingFilters.add(packetID);
}
/**
* Remove an underlying packet handler of ths ID.
* @param packetID - packet ID to unregister.
*/
@Override
public void removePacketHandler(int packetID) {
sendingFilters.remove(packetID);
}
/**
* Used to construct a player hook.
* @param player - the player to hook.
* @param hook - the hook type.
* @return A new player hoook
* @throws IllegalAccessException Unable to do our reflection magic.
*/
private PlayerInjector getHookInstance(Player player, PlayerInjectHooks hook) throws IllegalAccessException {
// Construct the correct player hook
switch (hook) {
case NETWORK_HANDLER_FIELDS:
return new NetworkFieldInjector(classLoader, reporter, player, invoker, sendingFilters);
case NETWORK_MANAGER_OBJECT:
return new NetworkObjectInjector(classLoader, reporter, player, invoker, sendingFilters);
case NETWORK_SERVER_OBJECT:
return new NetworkServerInjector(classLoader, reporter, player, invoker, sendingFilters, serverInjection);
default:
throw new IllegalArgumentException("Cannot construct a player injector.");
}
}
/**
* Retrieve a player by its DataInput connection.
* @param inputStream - the associated DataInput connection.
* @return The player.
* @throws InterruptedException If the thread was interrupted during the wait.
*/
@Override
public Player getPlayerByConnection(DataInputStream inputStream) throws InterruptedException {
return getPlayerByConnection(inputStream, TIMEOUT_PLAYER_LOOKUP, TimeUnit.MILLISECONDS);
}
/**
* Retrieve a player by its DataInput connection.
* @param inputStream - the associated DataInput connection.
* @param playerTimeout - the amount of time to wait for a result.
* @param unit - unit of playerTimeout.
* @return The player.
* @throws InterruptedException If the thread was interrupted during the wait.
*/
@Override
public Player getPlayerByConnection(DataInputStream inputStream, long playerTimeout, TimeUnit unit) throws InterruptedException {
// Wait until the connection owner has been established
PlayerInjector injector = dataInputLookup.get(inputStream, playerTimeout, unit);
if (injector != null) {
return injector.getPlayer();
} else {
reporter.reportWarning(this, "Unable to find stream: " + inputStream);
return null;
}
}
/**
* Helper function that retrieves the injector type of a given player injector.
* @param injector - injector type.
* @return The injector type.
*/
private PlayerInjectHooks getInjectorType(PlayerInjector injector) {
return injector != null ? injector.getHookType() : PlayerInjectHooks.NONE;
}
/**
* Initialize a player hook, allowing us to read server packets.
* <p>
* This call will be ignored if there's no listener that can receive the given events.
* @param player - player to hook.
*/
@Override
public void injectPlayer(Player player) {
// Inject using the player instance itself
if (isInjectionNecessary(GamePhase.PLAYING)) {
injectPlayer(player, player, GamePhase.PLAYING);
}
}
/**
* Determine if it's truly necessary to perform the given player injection.
* @param phase - current game phase.
* @return TRUE if we should perform the injection, FALSE otherwise.
*/
@Override
public boolean isInjectionNecessary(GamePhase phase) {
return injectionFilter.apply(phase);
}
/**
* Initialize a player hook, allowing us to read server packets.
* <p>
* This method will always perform the instructed injection.
*
* @param player - player to hook.
* @param injectionPoint - the object to use during the injection process.
* @param phase - the current game phase.
* @return The resulting player injector, or NULL if the injection failed.
*/
PlayerInjector injectPlayer(Player player, Object injectionPoint, GamePhase phase) {
// Unfortunately, due to NetLoginHandler, multiple threads may potentially call this method.
synchronized (player) {
return injectPlayerInternal(player, injectionPoint, phase);
}
}
// Unsafe variant of the above
private PlayerInjector injectPlayerInternal(Player player, Object injectionPoint, GamePhase phase) {
PlayerInjector injector = playerInjection.get(player);
PlayerInjectHooks tempHook = getPlayerHook(phase);
PlayerInjectHooks permanentHook = tempHook;
// The given player object may be fake, so be careful!
// See if we need to inject something else
boolean invalidInjector = injector != null ? !injector.canInject(phase) : true;
// Don't inject if the class has closed
if (!hasClosed && player != null && (tempHook != getInjectorType(injector) || invalidInjector)) {
while (tempHook != PlayerInjectHooks.NONE) {
// Whether or not the current hook method failed completely
boolean hookFailed = false;
// Remove the previous hook, if any
cleanupHook(injector);
try {
injector = getHookInstance(player, tempHook);
// Make sure this injection method supports the current game phase
if (injector.canInject(phase)) {
injector.initialize(injectionPoint);
DataInputStream inputStream = injector.getInputStream(false);
Socket socket = injector.getSocket();
SocketAddress address = socket != null ? socket.getRemoteSocketAddress() : null;
// Guard against NPE here too
PlayerInjector previous = address != null ? addressLookup.get(address) : null;
// Close any previously associated hooks before we proceed
if (previous != null) {
uninjectPlayer(previous.getPlayer(), false, true);
}
injector.injectManager();
if (inputStream != null)
dataInputLookup.put(inputStream, injector);
if (address != null)
addressLookup.put(address, injector);
break;
}
} catch (PlayerLoggedOutException e) {
throw e;
} catch (Exception e) {
// Mark this injection attempt as a failure
reporter.reportDetailed(this, "Player hook " + tempHook.toString() + " failed.",
e, player, injectionPoint, phase);
hookFailed = true;
}
// Choose the previous player hook type
tempHook = PlayerInjectHooks.values()[tempHook.ordinal() - 1];
if (hookFailed)
reporter.reportWarning(this, "Switching to " + tempHook.toString() + " instead.");
// Check for UTTER FAILURE
if (tempHook == PlayerInjectHooks.NONE) {
cleanupHook(injector);
injector = null;
hookFailed = true;
}
// Should we set the default hook method too?
if (hookFailed) {
permanentHook = tempHook;
}
}
// Update values
if (injector != null)
lastSuccessfulHook = injector;
if (permanentHook != getPlayerHook(phase))
setPlayerHook(phase, tempHook);
// Save injector
if (injector != null) {
playerInjection.put(player, injector);
}
}
return injector;
}
private void cleanupHook(PlayerInjector injector) {
// Clean up as much as possible
try {
if (injector != null)
injector.cleanupAll();
} catch (Exception ex) {
reporter.reportDetailed(this, "Cleaing up after player hook failed.", ex, injector);
}
}
/**
* Invoke special routines for handling disconnect before a player is uninjected.
* @param player - player to process.
*/
@Override
public void handleDisconnect(Player player) {
PlayerInjector injector = getInjector(player);
if (injector != null) {
injector.handleDisconnect();
}
}
/**
* Unregisters the given player.
* @param player - player to unregister.
* @return TRUE if a player has been uninjected, FALSE otherwise.
*/
@Override
public boolean uninjectPlayer(Player player) {
return uninjectPlayer(player, true, false);
}
/**
* Unregisters the given player.
* @param player - player to unregister.
* @param removeAuxiliary - TRUE to remove auxiliary information, such as input stream and address.
* @return TRUE if a player has been uninjected, FALSE otherwise.
*/
@Override
public boolean uninjectPlayer(Player player, boolean removeAuxiliary) {
return uninjectPlayer(player, removeAuxiliary, false);
}
/**
* Unregisters the given player.
* @param player - player to unregister.
* @param removeAuxiliary - TRUE to remove auxiliary information, such as input stream and address.
* @param prepareNextHook - whether or not we need to fix any lingering hooks.
* @return TRUE if a player has been uninjected, FALSE otherwise.
*/
private boolean uninjectPlayer(Player player, boolean removeAuxiliary, boolean prepareNextHook) {
if (!hasClosed && player != null) {
PlayerInjector injector = playerInjection.remove(player);
if (injector != null) {
InetSocketAddress address = player.getAddress();
injector.cleanupAll();
// Remove the "hooked" network manager in our instance as well
if (prepareNextHook && injector instanceof NetworkObjectInjector) {
try {
PlayerInjector dummyInjector = getHookInstance(player, PlayerInjectHooks.NETWORK_SERVER_OBJECT);
dummyInjector.initializePlayer(player);
dummyInjector.setNetworkManager(injector.getNetworkManager(), true);
} catch (IllegalAccessException e) {
// Let the user know
reporter.reportWarning(this, "Unable to fully revert old injector. May cause conflicts.", e);
}
}
// Clean up
if (removeAuxiliary) {
// Note that the dataInputLookup will clean itself
if (address != null)
addressLookup.remove(address);
}
return true;
}
}
return false;
}
/**
* Unregisters a player by the given address.
* <p>
* If the server handler has been created before we've gotten a chance to unject the player,
* the method will try a workaround to remove the injected hook in the NetServerHandler.
*
* @param address - address of the player to unregister.
* @return TRUE if a player has been uninjected, FALSE otherwise.
*/
@Override
public boolean uninjectPlayer(InetSocketAddress address) {
if (!hasClosed && address != null) {
PlayerInjector injector = addressLookup.get(address);
// Clean up
if (injector != null)
uninjectPlayer(injector.getPlayer(), false, true);
return true;
}
return false;
}
/**
* Send the given packet to the given reciever.
* @param reciever - the player receiver.
* @param packet - the packet to send.
* @param filters - whether or not to invoke the packet filters.
* @throws InvocationTargetException If an error occured during sending.
*/
@Override
public void sendServerPacket(Player reciever, PacketContainer packet, boolean filters) throws InvocationTargetException {
PlayerInjector injector = getInjector(reciever);
// Send the packet, or drop it completely
if (injector != null) {
injector.sendServerPacket(packet.getHandle(), filters);
} else {
throw new PlayerLoggedOutException(String.format(
"Unable to send packet %s (%s): Player %s has logged out.",
packet.getID(), packet, reciever.getName()
));
}
}
/**
* Process a packet as if it were sent by the given player.
* @param player - the sender.
* @param mcPacket - the packet to process.
* @throws IllegalAccessException If the reflection machinery failed.
* @throws InvocationTargetException If the underlying method caused an error.
*/
@Override
public void processPacket(Player player, Object mcPacket) throws IllegalAccessException, InvocationTargetException {
PlayerInjector injector = getInjector(player);
// Process the given packet, or simply give up
if (injector != null)
injector.processPacket(mcPacket);
else
throw new PlayerLoggedOutException(String.format(
"Unable to receieve packet %s. Player %s has logged out.",
mcPacket, player.getName()
));
}
/**
* Retrieve the injector associated with this player.
* @param player - the player to find.
* @return The injector, or NULL if not found.
*/
private PlayerInjector getInjector(Player player) {
PlayerInjector injector = playerInjection.get(player);
if (injector == null) {
// Try getting it from the player itself
if (player instanceof InjectContainer)
return ((InjectContainer) player).getInjector();
else
return searchAddressLookup(player);
} else {
return injector;
}
}
/**
* Find an injector by looking through the address map.
* @param player - player to find.
* @return The injector, or NULL if not found.
*/
private PlayerInjector searchAddressLookup(Player player) {
// See if we can find it anywhere
for (PlayerInjector injector : addressLookup.values()) {
if (player.equals(injector.getUpdatedPlayer())) {
return injector;
}
}
return null;
}
/**
* Retrieve a player injector by looking for its NetworkManager.
* @param networkManager - current network manager.
* @return Related player injector.
*/
PlayerInjector getInjectorByNetworkHandler(Object networkManager) {
// That's not legal
if (networkManager == null)
return null;
// O(n) is okay in this instance. This is only a backup solution.
for (PlayerInjector injector : playerInjection.values()) {
if (injector.getNetworkManager() == networkManager)
return injector;
}
// None found
return null;
}
/**
* Determine if the given listeners are valid.
* @param listeners - listeners to check.
*/
@Override
public void checkListener(Set<PacketListener> listeners) {
// Make sure the current listeners are compatible
if (lastSuccessfulHook != null) {
for (PacketListener listener : listeners) {
checkListener(listener);
}
}
}
/**
* Determine if a listener is valid or not.
* <p>
* If not, a warning will be printed to the console.
* @param listener - listener to check.
*/
@Override
public void checkListener(PacketListener listener) {
if (lastSuccessfulHook != null) {
UnsupportedListener result = lastSuccessfulHook.checkListener(listener);
// We won't prevent the listener, as it may still have valid packets
if (result != null) {
reporter.reportWarning(this, "Cannot fully register listener for " +
PacketAdapter.getPluginName(listener) + ": " + result.toString());
// These are illegal
for (int packetID : result.getPackets())
removePacketHandler(packetID);
}
}
}
/**
* Retrieve the current list of registered sending listeners.
* @return List of the sending listeners's packet IDs.
*/
@Override
public Set<Integer> getSendingFilters() {
return sendingFilters.toSet();
}
@Override
public void close() {
// Guard
if (hasClosed || playerInjection == null)
return;
// Remove everything
for (PlayerInjector injection : playerInjection.values()) {
if (injection != null) {
injection.cleanupAll();
}
}
// Remove server handler
if (serverInjection != null)
serverInjection.cleanupAll();
if (netLoginInjector != null)
netLoginInjector.cleanupAll();
serverInjection = null;
netLoginInjector = null;
hasClosed = true;
playerInjection.clear();
addressLookup.clear();
invoker = null;
}
/**
* Inform the current PlayerInjector that it should update the DataInputStream next.
* @param player - the player to update.
*/
@Override
public void scheduleDataInputRefresh(Player player) {
final PlayerInjector injector = getInjector(player);
// Update the DataInputStream
if (injector != null) {
injector.scheduleAction(new Runnable() {
@Override
public void run() {
dataInputLookup.put(injector.getInputStream(false), injector);
}
});
}
}
}