diff --git a/ProtocolLib/src/main/java/com/comphenix/protocol/events/PacketContainer.java b/ProtocolLib/src/main/java/com/comphenix/protocol/events/PacketContainer.java index 85cebfe7..46d5e7f2 100644 --- a/ProtocolLib/src/main/java/com/comphenix/protocol/events/PacketContainer.java +++ b/ProtocolLib/src/main/java/com/comphenix/protocol/events/PacketContainer.java @@ -285,43 +285,11 @@ public class PacketContainer implements Serializable { * internal Minecraft ItemStack. * @return A modifier for ItemStack array fields. */ - public StructureModifier getItemArrayModifier() { - - final EquivalentConverter stackConverter = BukkitConverters.getItemStackConverter(); - + public StructureModifier getItemArrayModifier() { // Convert to and from the Bukkit wrapper return structureModifier.withType( MinecraftReflection.getItemStackArrayClass(), - BukkitConverters.getIgnoreNull(new EquivalentConverter() { - - public Object getGeneric(ClassgenericType, ItemStack[] specific) { - Class nmsStack = MinecraftReflection.getItemStackClass(); - Object[] result = (Object[]) Array.newInstance(nmsStack, specific.length); - - // Unwrap every item - for (int i = 0; i < result.length; i++) { - result[i] = stackConverter.getGeneric(nmsStack, specific[i]); - } - return result; - } - - @Override - public ItemStack[] getSpecific(Object generic) { - Object[] input = (Object[]) generic; - ItemStack[] result = new ItemStack[input.length]; - - // Add the wrapper - for (int i = 0; i < result.length; i++) { - result[i] = stackConverter.getSpecific(input[i]); - } - return result; - } - - @Override - public Class getSpecificType() { - return ItemStack[].class; - } - })); + BukkitConverters.getIgnoreNull(new ItemStackArrayConverter())); } /** @@ -556,4 +524,40 @@ public class PacketContainer implements Serializable { return method; } + + /** + * Represents an equivalent converter for ItemStack arrays. + * @author Kristian + */ + private static class ItemStackArrayConverter implements EquivalentConverter { + final EquivalentConverter stackConverter = BukkitConverters.getItemStackConverter(); + + public Object getGeneric(ClassgenericType, ItemStack[] specific) { + Class nmsStack = MinecraftReflection.getItemStackClass(); + Object[] result = (Object[]) Array.newInstance(nmsStack, specific.length); + + // Unwrap every item + for (int i = 0; i < result.length; i++) { + result[i] = stackConverter.getGeneric(nmsStack, specific[i]); + } + return result; + } + + @Override + public ItemStack[] getSpecific(Object generic) { + Object[] input = (Object[]) generic; + ItemStack[] result = new ItemStack[input.length]; + + // Add the wrapper + for (int i = 0; i < result.length; i++) { + result[i] = stackConverter.getSpecific(input[i]); + } + return result; + } + + @Override + public Class getSpecificType() { + return ItemStack[].class; + } + } } diff --git a/ProtocolLib/src/main/java/com/comphenix/protocol/injector/player/NetworkServerInjector.java b/ProtocolLib/src/main/java/com/comphenix/protocol/injector/player/NetworkServerInjector.java index c9a0b6bb..a3fc2748 100644 --- a/ProtocolLib/src/main/java/com/comphenix/protocol/injector/player/NetworkServerInjector.java +++ b/ProtocolLib/src/main/java/com/comphenix/protocol/injector/player/NetworkServerInjector.java @@ -1,352 +1,358 @@ -/* - * 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.lang.reflect.Field; -import java.lang.reflect.InvocationTargetException; -import java.lang.reflect.Method; -import java.util.Arrays; - -import net.sf.cglib.proxy.*; - -import org.bukkit.entity.Player; - -import com.comphenix.protocol.concurrency.IntegerSet; -import com.comphenix.protocol.error.ErrorReporter; -import com.comphenix.protocol.error.Report; -import com.comphenix.protocol.error.ReportType; -import com.comphenix.protocol.events.PacketListener; -import com.comphenix.protocol.injector.GamePhase; -import com.comphenix.protocol.injector.ListenerInvoker; -import com.comphenix.protocol.injector.PacketFilterManager.PlayerInjectHooks; -import com.comphenix.protocol.reflect.FieldUtils; -import com.comphenix.protocol.reflect.FuzzyReflection; -import com.comphenix.protocol.reflect.ObjectWriter; -import com.comphenix.protocol.reflect.VolatileField; -import com.comphenix.protocol.reflect.instances.DefaultInstances; -import com.comphenix.protocol.reflect.instances.ExistingGenerator; -import com.comphenix.protocol.utility.MinecraftMethods; -import com.comphenix.protocol.utility.MinecraftReflection; -import com.comphenix.protocol.utility.MinecraftVersion; - -/** - * Represents a player hook into the NetServerHandler class. - * - * @author Kristian - */ -class NetworkServerInjector extends PlayerInjector { - // Disconnected field - public static final ReportType REPORT_ASSUMING_DISCONNECT_FIELD = new ReportType("Unable to find 'disconnected' field. Assuming %s."); - public static final ReportType REPORT_DISCONNECT_FIELD_MISSING = new ReportType("Cannot find disconnected field. Is ProtocolLib up to date?"); - public static final ReportType REPORT_DISCONNECT_FIELD_FAILURE = new ReportType("Unable to update disconnected field. Player quit event may be sent twice."); - - private volatile static CallbackFilter callbackFilter; - private volatile static boolean foundSendPacket; - - private volatile static Field disconnectField; - private InjectedServerConnection serverInjection; - - // Determine if we're listening - private IntegerSet sendingFilters; - - // Used to create proxy objects - private ClassLoader classLoader; - - // Whether or not the player has disconnected - private boolean hasDisconnected; - - // Used to copy fields - private final ObjectWriter writer = new ObjectWriter(); - - public NetworkServerInjector( - ClassLoader classLoader, ErrorReporter reporter, Player player, - ListenerInvoker invoker, IntegerSet sendingFilters, - InjectedServerConnection serverInjection) throws IllegalAccessException { - - super(reporter, player, invoker); - this.classLoader = classLoader; - this.sendingFilters = sendingFilters; - this.serverInjection = serverInjection; - } - - @Override - protected boolean hasListener(int packetID) { - return sendingFilters.contains(packetID); - } - - @Override - public void sendServerPacket(Object packet, boolean filtered) throws InvocationTargetException { - Object serverDelegate = filtered ? serverHandlerRef.getValue() : serverHandlerRef.getOldValue(); - - if (serverDelegate != null) { - try { - // Note that invocation target exception is a wrapper for a checked exception - MinecraftMethods.getSendPacketMethod().invoke(serverDelegate, packet); - - } catch (IllegalArgumentException e) { - throw e; - } catch (InvocationTargetException e) { - throw e; - } catch (IllegalAccessException e) { - throw new IllegalStateException("Unable to access send packet method.", e); - } - } else { - throw new IllegalStateException("Unable to load server handler. Cannot send packet."); - } - } - - @Override - public void injectManager() { - - if (serverHandlerRef == null) - throw new IllegalStateException("Cannot find server handler."); - // Don't inject twice - if (serverHandlerRef.getValue() instanceof Factory) - return; - - if (!tryInjectManager()) { - Class serverHandlerClass = MinecraftReflection.getNetServerHandlerClass(); - - // Try to override the proxied object - if (proxyServerField != null) { - serverHandlerRef = new VolatileField(proxyServerField, serverHandler, true); - serverHandler = serverHandlerRef.getValue(); - - if (serverHandler == null) - throw new RuntimeException("Cannot hook player: Inner proxy object is NULL."); - else - serverHandlerClass = serverHandler.getClass(); - - // Try again - if (tryInjectManager()) { - // It worked - probably - return; - } - } - - throw new RuntimeException( - "Cannot hook player: Unable to find a valid constructor for the " - + serverHandlerClass.getName() + " object."); - } - } - - private boolean tryInjectManager() { - Class serverClass = serverHandler.getClass(); - - Enhancer ex = new Enhancer(); - Callback sendPacketCallback = new MethodInterceptor() { - @Override - public Object intercept(Object obj, Method method, Object[] args, MethodProxy proxy) throws Throwable { - Object packet = args[0]; - - if (packet != null) { - packet = handlePacketSending(packet); - - // A NULL packet indicate cancelling - if (packet != null) - args[0] = packet; - else - return null; - } - - // Call the method directly - return proxy.invokeSuper(obj, args); - }; - }; - Callback noOpCallback = NoOp.INSTANCE; - - // Share callback filter - that way, we avoid generating a new class for - // every logged in player. - if (callbackFilter == null) { - final Method sendPacket = MinecraftMethods.getSendPacketMethod(); - - callbackFilter = new CallbackFilter() { - @Override - public int accept(Method method) { - if (isCallableEqual(sendPacket, method)) { - foundSendPacket = true; - return 0; - } else { - return 1; - } - } - }; - } - - ex.setClassLoader(classLoader); - ex.setSuperclass(serverClass); - ex.setCallbacks(new Callback[] { sendPacketCallback, noOpCallback }); - ex.setCallbackFilter(callbackFilter); - - // Find the Minecraft NetServerHandler superclass - Class minecraftSuperClass = getFirstMinecraftSuperClass(serverHandler.getClass()); - ExistingGenerator generator = ExistingGenerator.fromObjectFields(serverHandler, minecraftSuperClass); - DefaultInstances serverInstances = null; - - // Maybe the proxy instance can help? - Object proxyInstance = getProxyServerHandler(); - - // Use the existing server proxy when we create one - if (proxyInstance != null && proxyInstance != serverHandler) { - serverInstances = DefaultInstances.fromArray(generator, - ExistingGenerator.fromObjectArray(new Object[] { proxyInstance })); - } else { - serverInstances = DefaultInstances.fromArray(generator); - } - - serverInstances.setNonNull(true); - serverInstances.setMaximumRecursion(1); - - Object proxyObject = serverInstances.forEnhancer(ex).getDefault(serverClass); - - // Inject it now - if (proxyObject != null) { - // Did we override a sendPacket method? - if (!foundSendPacket) { - throw new IllegalArgumentException("Unable to find a sendPacket method in " + serverClass); - } - - serverInjection.replaceServerHandler(serverHandler, proxyObject); - serverHandlerRef.setValue(proxyObject); - return true; - } else { - return false; - } - } - - /** - * Determine if the two methods are equal in terms of call semantics. - *

- * Two methods are equal if they have the same name, parameter types and return type. - * @param first - first method. - * @param second - second method. - * @return TRUE if they are, FALSE otherwise. - */ - private boolean isCallableEqual(Method first, Method second) { - return first.getName().equals(second.getName()) && - first.getReturnType().equals(second.getReturnType()) && - Arrays.equals(first.getParameterTypes(), second.getParameterTypes()); - } - - private Object getProxyServerHandler() { - if (proxyServerField != null && !proxyServerField.equals(serverHandlerRef.getField())) { - try { - return FieldUtils.readField(proxyServerField, serverHandler, true); - } catch (Throwable e) { - // Oh well - } - } - - return null; - } - - private Class getFirstMinecraftSuperClass(Class clazz) { - if (MinecraftReflection.isMinecraftClass(clazz)) - return clazz; - else if (clazz.equals(Object.class)) - return clazz; - else - return getFirstMinecraftSuperClass(clazz.getSuperclass()); - } - - @Override - protected void cleanHook() { - if (serverHandlerRef != null && serverHandlerRef.isCurrentSet()) { - writer.copyTo(serverHandlerRef.getValue(), serverHandlerRef.getOldValue(), serverHandler.getClass()); - serverHandlerRef.revertValue(); - - try { - if (getNetHandler() != null) { - // Restore packet listener - try { - FieldUtils.writeField(netHandlerField, networkManager, serverHandlerRef.getOldValue(), true); - } catch (IllegalAccessException e) { - // Oh well - e.printStackTrace(); - } - } - } catch (IllegalAccessException e) { - e.printStackTrace(); - } - - // Prevent the PlayerQuitEvent from being sent twice - if (hasDisconnected) { - setDisconnect(serverHandlerRef.getValue(), true); - } - } - - serverInjection.revertServerHandler(serverHandler); - } - - @Override - public void handleDisconnect() { - hasDisconnected = true; - } - - /** - * Set the disconnected field in a NetServerHandler. - * @param handler - the NetServerHandler. - * @param value - the new value. - */ - private void setDisconnect(Object handler, boolean value) { - // Set it - try { - // Load the field - if (disconnectField == null) { - disconnectField = FuzzyReflection.fromObject(handler).getFieldByName("disconnected.*"); - } - FieldUtils.writeField(disconnectField, handler, value); - - } catch (IllegalArgumentException e) { - // Assume it's the first ... - if (disconnectField == null) { - disconnectField = FuzzyReflection.fromObject(handler).getFieldByType("disconnected", boolean.class); - reporter.reportWarning(this, Report.newBuilder(REPORT_ASSUMING_DISCONNECT_FIELD).messageParam(disconnectField)); - - // Try again - if (disconnectField != null) { - setDisconnect(handler, value); - return; - } - } - - // This is really bad - reporter.reportDetailed(this, Report.newBuilder(REPORT_DISCONNECT_FIELD_MISSING).error(e)); - - } catch (IllegalAccessException e) { - reporter.reportWarning(this, Report.newBuilder(REPORT_DISCONNECT_FIELD_FAILURE).error(e)); - } - } - - @Override - public UnsupportedListener checkListener(MinecraftVersion version, PacketListener listener) { - // We support everything - return null; - } - - @Override - public boolean canInject(GamePhase phase) { - // Doesn't work when logging in - return phase == GamePhase.PLAYING; - } - - @Override - public PlayerInjectHooks getHookType() { - return PlayerInjectHooks.NETWORK_SERVER_OBJECT; - } -} +/* + * 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.lang.reflect.Field; +import java.lang.reflect.InvocationTargetException; +import java.lang.reflect.Method; +import java.util.Arrays; + +import net.sf.cglib.proxy.*; + +import org.bukkit.entity.Player; + +import com.comphenix.protocol.concurrency.IntegerSet; +import com.comphenix.protocol.error.ErrorReporter; +import com.comphenix.protocol.error.Report; +import com.comphenix.protocol.error.ReportType; +import com.comphenix.protocol.events.PacketListener; +import com.comphenix.protocol.injector.GamePhase; +import com.comphenix.protocol.injector.ListenerInvoker; +import com.comphenix.protocol.injector.PacketFilterManager.PlayerInjectHooks; +import com.comphenix.protocol.reflect.FieldUtils; +import com.comphenix.protocol.reflect.FuzzyReflection; +import com.comphenix.protocol.reflect.ObjectWriter; +import com.comphenix.protocol.reflect.VolatileField; +import com.comphenix.protocol.reflect.instances.DefaultInstances; +import com.comphenix.protocol.reflect.instances.ExistingGenerator; +import com.comphenix.protocol.utility.MinecraftMethods; +import com.comphenix.protocol.utility.MinecraftReflection; +import com.comphenix.protocol.utility.MinecraftVersion; + +/** + * Represents a player hook into the NetServerHandler class. + * + * @author Kristian + */ +class NetworkServerInjector extends PlayerInjector { + // Disconnected field + public static final ReportType REPORT_ASSUMING_DISCONNECT_FIELD = new ReportType("Unable to find 'disconnected' field. Assuming %s."); + public static final ReportType REPORT_DISCONNECT_FIELD_MISSING = new ReportType("Cannot find disconnected field. Is ProtocolLib up to date?"); + public static final ReportType REPORT_DISCONNECT_FIELD_FAILURE = new ReportType("Unable to update disconnected field. Player quit event may be sent twice."); + + private volatile static CallbackFilter callbackFilter; + private volatile static boolean foundSendPacket; + + private volatile static Field disconnectField; + private InjectedServerConnection serverInjection; + + // Determine if we're listening + private IntegerSet sendingFilters; + + // Used to create proxy objects + private ClassLoader classLoader; + + // Whether or not the player has disconnected + private boolean hasDisconnected; + + // Used to copy fields + private final ObjectWriter writer = new ObjectWriter(); + + public NetworkServerInjector( + ClassLoader classLoader, ErrorReporter reporter, Player player, + ListenerInvoker invoker, IntegerSet sendingFilters, + InjectedServerConnection serverInjection) throws IllegalAccessException { + + super(reporter, player, invoker); + this.classLoader = classLoader; + this.sendingFilters = sendingFilters; + this.serverInjection = serverInjection; + } + + @Override + protected boolean hasListener(int packetID) { + return sendingFilters.contains(packetID); + } + + @Override + public void sendServerPacket(Object packet, boolean filtered) throws InvocationTargetException { + Object serverDelegate = filtered ? serverHandlerRef.getValue() : serverHandlerRef.getOldValue(); + + if (serverDelegate != null) { + try { + // Note that invocation target exception is a wrapper for a checked exception + MinecraftMethods.getSendPacketMethod().invoke(serverDelegate, packet); + + } catch (IllegalArgumentException e) { + throw e; + } catch (InvocationTargetException e) { + throw e; + } catch (IllegalAccessException e) { + throw new IllegalStateException("Unable to access send packet method.", e); + } + } else { + throw new IllegalStateException("Unable to load server handler. Cannot send packet."); + } + } + + @Override + public void injectManager() { + + if (serverHandlerRef == null) + throw new IllegalStateException("Cannot find server handler."); + // Don't inject twice + if (serverHandlerRef.getValue() instanceof Factory) + return; + + if (!tryInjectManager()) { + Class serverHandlerClass = MinecraftReflection.getNetServerHandlerClass(); + + // Try to override the proxied object + if (proxyServerField != null) { + serverHandlerRef = new VolatileField(proxyServerField, serverHandler, true); + serverHandler = serverHandlerRef.getValue(); + + if (serverHandler == null) + throw new RuntimeException("Cannot hook player: Inner proxy object is NULL."); + else + serverHandlerClass = serverHandler.getClass(); + + // Try again + if (tryInjectManager()) { + // It worked - probably + return; + } + } + + throw new RuntimeException( + "Cannot hook player: Unable to find a valid constructor for the " + + serverHandlerClass.getName() + " object."); + } + } + + private boolean tryInjectManager() { + Class serverClass = serverHandler.getClass(); + + Enhancer ex = new Enhancer(); + Callback sendPacketCallback = new MethodInterceptor() { + @Override + public Object intercept(Object obj, Method method, Object[] args, MethodProxy proxy) throws Throwable { + Object packet = args[0]; + + if (packet != null) { + packet = handlePacketSending(packet); + + // A NULL packet indicate cancelling + if (packet != null) + args[0] = packet; + else + return null; + } + + // Call the method directly + return proxy.invokeSuper(obj, args); + }; + }; + Callback noOpCallback = NoOp.INSTANCE; + + // Share callback filter - that way, we avoid generating a new class for + // every logged in player. + if (callbackFilter == null) { + callbackFilter = new SendMethodFilter(); + } + + ex.setClassLoader(classLoader); + ex.setSuperclass(serverClass); + ex.setCallbacks(new Callback[] { sendPacketCallback, noOpCallback }); + ex.setCallbackFilter(callbackFilter); + + // Find the Minecraft NetServerHandler superclass + Class minecraftSuperClass = getFirstMinecraftSuperClass(serverHandler.getClass()); + ExistingGenerator generator = ExistingGenerator.fromObjectFields(serverHandler, minecraftSuperClass); + DefaultInstances serverInstances = null; + + // Maybe the proxy instance can help? + Object proxyInstance = getProxyServerHandler(); + + // Use the existing server proxy when we create one + if (proxyInstance != null && proxyInstance != serverHandler) { + serverInstances = DefaultInstances.fromArray(generator, + ExistingGenerator.fromObjectArray(new Object[] { proxyInstance })); + } else { + serverInstances = DefaultInstances.fromArray(generator); + } + + serverInstances.setNonNull(true); + serverInstances.setMaximumRecursion(1); + + Object proxyObject = serverInstances.forEnhancer(ex).getDefault(serverClass); + + // Inject it now + if (proxyObject != null) { + // Did we override a sendPacket method? + if (!foundSendPacket) { + throw new IllegalArgumentException("Unable to find a sendPacket method in " + serverClass); + } + + serverInjection.replaceServerHandler(serverHandler, proxyObject); + serverHandlerRef.setValue(proxyObject); + return true; + } else { + return false; + } + } + + private Object getProxyServerHandler() { + if (proxyServerField != null && !proxyServerField.equals(serverHandlerRef.getField())) { + try { + return FieldUtils.readField(proxyServerField, serverHandler, true); + } catch (Throwable e) { + // Oh well + } + } + + return null; + } + + private Class getFirstMinecraftSuperClass(Class clazz) { + if (MinecraftReflection.isMinecraftClass(clazz)) + return clazz; + else if (clazz.equals(Object.class)) + return clazz; + else + return getFirstMinecraftSuperClass(clazz.getSuperclass()); + } + + @Override + protected void cleanHook() { + if (serverHandlerRef != null && serverHandlerRef.isCurrentSet()) { + writer.copyTo(serverHandlerRef.getValue(), serverHandlerRef.getOldValue(), serverHandler.getClass()); + serverHandlerRef.revertValue(); + + try { + if (getNetHandler() != null) { + // Restore packet listener + try { + FieldUtils.writeField(netHandlerField, networkManager, serverHandlerRef.getOldValue(), true); + } catch (IllegalAccessException e) { + // Oh well + e.printStackTrace(); + } + } + } catch (IllegalAccessException e) { + e.printStackTrace(); + } + + // Prevent the PlayerQuitEvent from being sent twice + if (hasDisconnected) { + setDisconnect(serverHandlerRef.getValue(), true); + } + } + + serverInjection.revertServerHandler(serverHandler); + } + + @Override + public void handleDisconnect() { + hasDisconnected = true; + } + + /** + * Set the disconnected field in a NetServerHandler. + * @param handler - the NetServerHandler. + * @param value - the new value. + */ + private void setDisconnect(Object handler, boolean value) { + // Set it + try { + // Load the field + if (disconnectField == null) { + disconnectField = FuzzyReflection.fromObject(handler).getFieldByName("disconnected.*"); + } + FieldUtils.writeField(disconnectField, handler, value); + + } catch (IllegalArgumentException e) { + // Assume it's the first ... + if (disconnectField == null) { + disconnectField = FuzzyReflection.fromObject(handler).getFieldByType("disconnected", boolean.class); + reporter.reportWarning(this, Report.newBuilder(REPORT_ASSUMING_DISCONNECT_FIELD).messageParam(disconnectField)); + + // Try again + if (disconnectField != null) { + setDisconnect(handler, value); + return; + } + } + + // This is really bad + reporter.reportDetailed(this, Report.newBuilder(REPORT_DISCONNECT_FIELD_MISSING).error(e)); + + } catch (IllegalAccessException e) { + reporter.reportWarning(this, Report.newBuilder(REPORT_DISCONNECT_FIELD_FAILURE).error(e)); + } + } + + @Override + public UnsupportedListener checkListener(MinecraftVersion version, PacketListener listener) { + // We support everything + return null; + } + + @Override + public boolean canInject(GamePhase phase) { + // Doesn't work when logging in + return phase == GamePhase.PLAYING; + } + + @Override + public PlayerInjectHooks getHookType() { + return PlayerInjectHooks.NETWORK_SERVER_OBJECT; + } + + /** + * Represents a CallbackFilter that only matches the SendPacket method. + * @author Kristian + */ + private static class SendMethodFilter implements CallbackFilter { + private Method sendPacket = MinecraftMethods.getSendPacketMethod(); + + @Override + public int accept(Method method) { + if (isCallableEqual(sendPacket, method)) { + NetworkServerInjector.foundSendPacket = true; + return 0; + } else { + return 1; + } + } + + /** + * Determine if the two methods are equal in terms of call semantics. + *

+ * Two methods are equal if they have the same name, parameter types and return type. + * @param first - first method. + * @param second - second method. + * @return TRUE if they are, FALSE otherwise. + */ + private boolean isCallableEqual(Method first, Method second) { + return first.getName().equals(second.getName()) && + first.getReturnType().equals(second.getReturnType()) && + Arrays.equals(first.getParameterTypes(), second.getParameterTypes()); + } + } +} diff --git a/ProtocolLib/src/main/java/com/comphenix/protocol/injector/player/ProxyPlayerInjectionHandler.java b/ProtocolLib/src/main/java/com/comphenix/protocol/injector/player/ProxyPlayerInjectionHandler.java index 3789f070..1f3fa663 100644 --- a/ProtocolLib/src/main/java/com/comphenix/protocol/injector/player/ProxyPlayerInjectionHandler.java +++ b/ProtocolLib/src/main/java/com/comphenix/protocol/injector/player/ProxyPlayerInjectionHandler.java @@ -18,6 +18,7 @@ package com.comphenix.protocol.injector.player; import java.io.DataInputStream; +import java.lang.ref.WeakReference; import java.lang.reflect.InvocationTargetException; import java.net.InetSocketAddress; import java.net.SocketAddress; @@ -81,7 +82,7 @@ class ProxyPlayerInjectionHandler implements PlayerInjectionHandler { private NetLoginInjector netLoginInjector; // The last successful player hook - private PlayerInjector lastSuccessfulHook; + private WeakReference lastSuccessfulHook; // Dummy injection private Cache dummyInjectors = @@ -399,7 +400,7 @@ class ProxyPlayerInjectionHandler implements PlayerInjectionHandler { // Update values if (injector != null) - lastSuccessfulHook = injector; + lastSuccessfulHook = new WeakReference(injector); if (permanentHook != getPlayerHook(phase)) setPlayerHook(phase, tempHook); @@ -649,13 +650,23 @@ class ProxyPlayerInjectionHandler implements PlayerInjectionHandler { @Override public void checkListener(Set listeners) { // Make sure the current listeners are compatible - if (lastSuccessfulHook != null) { + if (getLastSuccessfulHook() != null) { for (PacketListener listener : listeners) { checkListener(listener); } } } + /** + * Retrieve the last successful hook. + *

+ * May be NULL if the hook has been uninjected. + * @return Last successful hook. + */ + private PlayerInjector getLastSuccessfulHook() { + return lastSuccessfulHook != null ? lastSuccessfulHook.get() : null; + } + /** * Determine if a listener is valid or not. *

@@ -664,8 +675,10 @@ class ProxyPlayerInjectionHandler implements PlayerInjectionHandler { */ @Override public void checkListener(PacketListener listener) { - if (lastSuccessfulHook != null) { - UnsupportedListener result = lastSuccessfulHook.checkListener(version, listener); + PlayerInjector last = getLastSuccessfulHook(); + + if (last != null) { + UnsupportedListener result = last.checkListener(version, listener); // We won't prevent the listener, as it may still have valid packets if (result != null) {