Upstream/ProtocolLib
1
0
Fork 0
mirror of https://github.com/dmulloy2/ProtocolLib.git synced 2024-12-25 18:47:52 +01:00
Code Issues Projects Releases Wiki Activity

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
ProtocolLib/src/main/java/com/comphenix/protocol/injector/PacketFilterManager.java
View File

@ -52,9 +52,10 @@ import com.comphenix.protocol.async.AsyncMarker;
import com.comphenix.protocol.error.ErrorReporter; import com.comphenix.protocol.error.ErrorReporter;
import com.comphenix.protocol.events.*; import com.comphenix.protocol.events.*;
import com.comphenix.protocol.injector.packet.PacketInjector; 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.packet.PacketRegistry;
import com.comphenix.protocol.injector.player.PlayerInjectionHandler; 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.FieldAccessException;
import com.comphenix.protocol.reflect.FuzzyReflection; import com.comphenix.protocol.reflect.FuzzyReflection;
import com.comphenix.protocol.utility.MinecraftReflection; import com.comphenix.protocol.utility.MinecraftReflection;
@ -181,10 +182,22 @@ public final class PacketFilterManager implements ProtocolManager, ListenerInvok
try { try {
// Initialize injection mangers // Initialize injection mangers
this.playerInjection = new PlayerInjectionHandler( this.playerInjection = PlayerInjectorBuilder.newBuilder().
classLoader, reporter, isInjectionNecessary, this, packetListeners, server); invoker(this).
this.packetInjector = InjectorFactory.getInstance().createProxyInjector( server(server).
classLoader, this, playerInjection, reporter); 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); this.asyncFilterManager = new AsyncFilterManager(reporter, server.getScheduler(), this);
// Attempt to load the list of server and client packets // Attempt to load the list of server and client packets

42
ProtocolLib/src/main/java/com/comphenix/protocol/injector/packet/InjectorFactory.java
View File

@ -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
View File

@ -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(); private ConcurrentMap<Object, PlayerInjector> injectedLogins = Maps.newConcurrentMap();
// Handles every hook // Handles every hook
private PlayerInjectionHandler injectionHandler; private ProxyPlayerInjectionHandler injectionHandler;
private Server server; private Server server;
// The current error rerporter // The current error rerporter
@ -47,7 +47,7 @@ class NetLoginInjector {
// Used to create fake players // Used to create fake players
private TemporaryPlayerFactory tempPlayerFactory = new TemporaryPlayerFactory(); 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.reporter = reporter;
this.injectionHandler = injectionHandler; this.injectionHandler = injectionHandler;
this.server = server; 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; package com.comphenix.protocol.injector.player;
import java.io.DataInputStream; import java.io.DataInputStream;
import java.lang.reflect.InvocationTargetException; import java.lang.reflect.InvocationTargetException;
import java.net.InetSocketAddress; import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketAddress;
import java.util.Map;
import java.util.Set; import java.util.Set;
import java.util.concurrent.TimeUnit; import java.util.concurrent.TimeUnit;
import org.bukkit.Server;
import org.bukkit.entity.Player; 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.PacketContainer;
import com.comphenix.protocol.events.PacketListener; import com.comphenix.protocol.events.PacketListener;
import com.comphenix.protocol.injector.GamePhase; 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.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. * Retrieves how the server packets are read.
* @return Injection method for reading server packets. * @return Injection method for reading server packets.
*/ */
public PlayerInjectHooks getPlayerHook() { public abstract PlayerInjectHooks getPlayerHook();
return getPlayerHook(GamePhase.PLAYING);
}
/** /**
* Retrieves how the server packets are read. * Retrieves how the server packets are read.
* @param phase - the current game phase. * @param phase - the current game phase.
* @return Injection method for reading server packets. * @return Injection method for reading server packets.
*/ */
public PlayerInjectHooks getPlayerHook(GamePhase phase) { public abstract 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. * Sets how the server packets are read.
* @param playerHook - the new injection method for reading server packets. * @param playerHook - the new injection method for reading server packets.
*/ */
public void setPlayerHook(PlayerInjectHooks playerHook) { public abstract void setPlayerHook(PlayerInjectHooks playerHook);
setPlayerHook(GamePhase.PLAYING, playerHook);
}
/** /**
* Sets how the server packets are read. * Sets how the server packets are read.
* @param phase - the current game phase. * @param phase - the current game phase.
* @param playerHook - the new injection method for reading server packets. * @param playerHook - the new injection method for reading server packets.
*/ */
public void setPlayerHook(GamePhase phase, PlayerInjectHooks playerHook) { public abstract 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. * Add an underlying packet handler of the given ID.
* @param packetID - packet ID to register. * @param packetID - packet ID to register.
*/ */
public void addPacketHandler(int packetID) { public abstract void addPacketHandler(int packetID);
sendingFilters.add(packetID);
}
/** /**
* Remove an underlying packet handler of ths ID. * Remove an underlying packet handler of ths ID.
* @param packetID - packet ID to unregister. * @param packetID - packet ID to unregister.
*/ */
public void removePacketHandler(int packetID) { public abstract 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. * Retrieve a player by its DataInput connection.
* @param inputStream - the associated DataInput connection. * @param inputStream - the associated DataInput connection.
* @return The player. * @return The player.
* @throws InterruptedException If the thread was interrupted during the wait. * @throws InterruptedException If the thread was interrupted during the wait.
*/ */
public Player getPlayerByConnection(DataInputStream inputStream) throws InterruptedException { public abstract Player getPlayerByConnection(DataInputStream inputStream)
return getPlayerByConnection(inputStream, TIMEOUT_PLAYER_LOOKUP, TimeUnit.MILLISECONDS); throws InterruptedException;
}
/** /**
* Retrieve a player by its DataInput connection. * Retrieve a player by its DataInput connection.
* @param inputStream - the associated DataInput connection. * @param inputStream - the associated DataInput connection.
@ -214,243 +69,44 @@ public class PlayerInjectionHandler {
* @return The player. * @return The player.
* @throws InterruptedException If the thread was interrupted during the wait. * @throws InterruptedException If the thread was interrupted during the wait.
*/ */
public Player getPlayerByConnection(DataInputStream inputStream, long playerTimeout, TimeUnit unit) throws InterruptedException { public abstract 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. * Initialize a player hook, allowing us to read server packets.
* <p> * <p>
* This call will be ignored if there's no listener that can receive the given events. * This call will be ignored if there's no listener that can receive the given events.
* @param player - player to hook. * @param player - player to hook.
*/ */
public void injectPlayer(Player player) { public abstract 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. * Determine if it's truly necessary to perform the given player injection.
* @param phase - current game phase. * @param phase - current game phase.
* @return TRUE if we should perform the injection, FALSE otherwise. * @return TRUE if we should perform the injection, FALSE otherwise.
*/ */
public boolean isInjectionNecessary(GamePhase phase) { public abstract 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. * Invoke special routines for handling disconnect before a player is uninjected.
* @param player - player to process. * @param player - player to process.
*/ */
public void handleDisconnect(Player player) { public abstract void handleDisconnect(Player player);
PlayerInjector injector = getInjector(player);
if (injector != null) {
injector.handleDisconnect();
}
}
/** /**
* Unregisters the given player. * Unregisters the given player.
* @param player - player to unregister. * @param player - player to unregister.
* @return TRUE if a player has been uninjected, FALSE otherwise. * @return TRUE if a player has been uninjected, FALSE otherwise.
*/ */
public boolean uninjectPlayer(Player player) { public abstract boolean uninjectPlayer(Player player);
return uninjectPlayer(player, true, false);
}
/** /**
* Unregisters the given player. * Unregisters the given player.
* @param player - player to unregister. * @param player - player to unregister.
* @param removeAuxiliary - TRUE to remove auxiliary information, such as input stream and address. * @param removeAuxiliary - TRUE to remove auxiliary information, such as input stream and address.
* @return TRUE if a player has been uninjected, FALSE otherwise. * @return TRUE if a player has been uninjected, FALSE otherwise.
*/ */
public boolean uninjectPlayer(Player player, boolean removeAuxiliary) { public abstract 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. * Unregisters a player by the given address.
* <p> * <p>
@ -460,19 +116,8 @@ public class PlayerInjectionHandler {
* @param address - address of the player to unregister. * @param address - address of the player to unregister.
* @return TRUE if a player has been uninjected, FALSE otherwise. * @return TRUE if a player has been uninjected, FALSE otherwise.
*/ */
public boolean uninjectPlayer(InetSocketAddress address) { public abstract 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. * Send the given packet to the given reciever.
* @param reciever - the player receiver. * @param reciever - the player receiver.
@ -480,20 +125,9 @@ public class PlayerInjectionHandler {
* @param filters - whether or not to invoke the packet filters. * @param filters - whether or not to invoke the packet filters.
* @throws InvocationTargetException If an error occured during sending. * @throws InvocationTargetException If an error occured during sending.
*/ */
public void sendServerPacket(Player reciever, PacketContainer packet, boolean filters) throws InvocationTargetException { public abstract void sendServerPacket(Player reciever, PacketContainer packet, boolean filters)
PlayerInjector injector = getInjector(reciever); throws InvocationTargetException;
// 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. * Process a packet as if it were sent by the given player.
* @param player - the sender. * @param player - the sender.
@ -501,158 +135,37 @@ public class PlayerInjectionHandler {
* @throws IllegalAccessException If the reflection machinery failed. * @throws IllegalAccessException If the reflection machinery failed.
* @throws InvocationTargetException If the underlying method caused an error. * @throws InvocationTargetException If the underlying method caused an error.
*/ */
public void processPacket(Player player, Object mcPacket) throws IllegalAccessException, InvocationTargetException { public abstract 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. * Determine if the given listeners are valid.
* @param listeners - listeners to check. * @param listeners - listeners to check.
*/ */
public void checkListener(Set<PacketListener> listeners) { public abstract 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. * Determine if a listener is valid or not.
* <p> * <p>
* If not, a warning will be printed to the console. * If not, a warning will be printed to the console.
* @param listener - listener to check. * @param listener - listener to check.
*/ */
public void checkListener(PacketListener listener) { public abstract 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. * Retrieve the current list of registered sending listeners.
* @return List of the sending listeners's packet IDs. * @return List of the sending listeners's packet IDs.
*/ */
public Set<Integer> getSendingFilters() { public abstract Set<Integer> getSendingFilters();
return sendingFilters.toSet();
}
public void close() {
// Guard
if (hasClosed || playerInjection == null)
return;
// Remove everything /**
for (PlayerInjector injection : playerInjection.values()) { * Close any lingering proxy injections.
if (injection != null) { */
injection.cleanupAll(); public abstract void close();
}
}
// 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. * Inform the current PlayerInjector that it should update the DataInputStream next.
* @param player - the player to update. * @param player - the player to update.
*/ */
public void scheduleDataInputRefresh(Player player) { public abstract 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);
}
});
}
}
}

144
ProtocolLib/src/main/java/com/comphenix/protocol/injector/player/PlayerInjectorBuilder.java Normal file
View File

@ -0,0 +1,144 @@
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);
}
}

679
ProtocolLib/src/main/java/com/comphenix/protocol/injector/player/ProxyPlayerInjectionHandler.java Normal file
View File

@ -0,0 +1,679 @@
/*
* 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);
}
});
}
}
}