Handle exceptions in injected code.

This is very important, otherwise the server may crash unnecessarily.

ProtocolLib/src/main/java/com/comphenix/protocol/injector/PacketFilterManager.java

@@ -49,7 +49,6 @@ import com.comphenix.protocol.AsynchronousManager;
 import com.comphenix.protocol.ProtocolManager;
 import com.comphenix.protocol.async.AsyncFilterManager;
 import com.comphenix.protocol.async.AsyncMarker;
-import com.comphenix.protocol.error.DetailedErrorReporter;
 import com.comphenix.protocol.error.ErrorReporter;
 import com.comphenix.protocol.events.*;
 import com.comphenix.protocol.injector.player.PlayerInjectionHandler;
@@ -142,7 +141,7 @@ public final class PacketFilterManager implements ProtocolManager, ListenerInvok
 	 * Only create instances of this class if protocol lib is disabled.
 	 * @param unhookTask 
 	 */
-	public PacketFilterManager(ClassLoader classLoader, Server server, DelayedSingleTask unhookTask, DetailedErrorReporter reporter) {
+	public PacketFilterManager(ClassLoader classLoader, Server server, DelayedSingleTask unhookTask, ErrorReporter reporter) {
 		if (reporter == null)
 			throw new IllegalArgumentException("reporter cannot be NULL.");
 		if (classLoader == null)
@@ -175,7 +174,7 @@ public final class PacketFilterManager implements ProtocolManager, ListenerInvok
 		try {
 			// Initialize injection mangers
 			this.playerInjection = new PlayerInjectionHandler(classLoader, reporter, isInjectionNecessary, this, packetListeners, server);
-			this.packetInjector = new PacketInjector(classLoader, this, playerInjection);
+			this.packetInjector = new PacketInjector(classLoader, this, playerInjection, reporter);
 			this.asyncFilterManager = new AsyncFilterManager(reporter, server.getScheduler(), this);
 			
 			// Attempt to load the list of server and client packets

ProtocolLib/src/main/java/com/comphenix/protocol/injector/PacketInjector.java

@@ -31,6 +31,7 @@ import net.minecraft.server.Packet;
 import net.sf.cglib.proxy.Callback;
 import net.sf.cglib.proxy.Enhancer;
 
+import com.comphenix.protocol.error.ErrorReporter;
 import com.comphenix.protocol.events.PacketContainer;
 import com.comphenix.protocol.events.PacketEvent;
 import com.comphenix.protocol.injector.player.PlayerInjectionHandler;
@@ -51,6 +52,9 @@ class PacketInjector {
 	// The packet filter manager
 	private ListenerInvoker manager;
 	
+	// Error reporter
+	private ErrorReporter reporter;
+	
 	// Allows us to determine the sender
 	private PlayerInjectionHandler playerInjection;
 	
@@ -61,11 +65,12 @@ class PacketInjector {
 	private ClassLoader classLoader;
 			
 	public PacketInjector(ClassLoader classLoader, ListenerInvoker manager, 
-						  PlayerInjectionHandler playerInjection) throws IllegalAccessException {
+						  PlayerInjectionHandler playerInjection, ErrorReporter reporter) throws IllegalAccessException {
 		
 		this.classLoader = classLoader;
 		this.manager = manager;
 		this.playerInjection = playerInjection;
+		this.reporter = reporter;
 		this.readModifier = new ConcurrentHashMap<Integer, ReadPacketModifier>();
 		initialize();
 	}
@@ -133,7 +138,7 @@ class PacketInjector {
 		Class proxy = ex.createClass();
 		
 		// Create the proxy handler
-		ReadPacketModifier modifier = new ReadPacketModifier(packetID, this);
+		ReadPacketModifier modifier = new ReadPacketModifier(packetID, this, reporter);
 		readModifier.put(packetID, modifier);
 		
 		// Add a static reference

ProtocolLib/src/main/java/com/comphenix/protocol/injector/ReadPacketModifier.java

@@ -25,6 +25,7 @@ import java.util.Map;
 import java.util.WeakHashMap;
 
 import com.comphenix.protocol.Packets;
+import com.comphenix.protocol.error.ErrorReporter;
 import com.comphenix.protocol.events.PacketContainer;
 import com.comphenix.protocol.events.PacketEvent;
 
@@ -44,12 +45,16 @@ class ReadPacketModifier implements MethodInterceptor {
 	private PacketInjector packetInjector;
 	private int packetID;
 	
+	// Report errors
+	private ErrorReporter reporter;
+	
 	// Whether or not a packet has been cancelled
 	private static Map<Object, Object> override = Collections.synchronizedMap(new WeakHashMap<Object, Object>());
 	
-	public ReadPacketModifier(int packetID, PacketInjector packetInjector) {
+	public ReadPacketModifier(int packetID, PacketInjector packetInjector, ErrorReporter reporter) {
 		this.packetID = packetID;
 		this.packetInjector = packetInjector;
+		this.reporter = reporter;
 	}
 	
 	/**
@@ -102,27 +107,32 @@ class ReadPacketModifier implements MethodInterceptor {
 		if (returnValue == null && 
 				Arrays.equals(method.getParameterTypes(), parameters)) {
 			
-			// We need this in order to get the correct player
-			DataInputStream input = (DataInputStream) args[0];
+			try {
+				// We need this in order to get the correct player
+				DataInputStream input = (DataInputStream) args[0];
 	
-			// Let the people know
-			PacketContainer container = new PacketContainer(packetID, (Packet) thisObj);
-			PacketEvent event = packetInjector.packetRecieved(container, input);
+				// Let the people know
+				PacketContainer container = new PacketContainer(packetID, (Packet) thisObj);
+				PacketEvent event = packetInjector.packetRecieved(container, input);
 				
-			// Handle override
-			if (event != null) {
-				Packet result = event.getPacket().getHandle();
+				// Handle override
+				if (event != null) {
+					Packet result = event.getPacket().getHandle();
 					
-				if (event.isCancelled()) {
-					override.put(thisObj, CANCEL_MARKER);
-				} else if (!objectEquals(thisObj, result)) {
-					override.put(thisObj, result);
-				}
-				
-				// Update DataInputStream next time
-				if (!event.isCancelled() && packetID == Packets.Server.KEY_RESPONSE) {
-					packetInjector.scheduleDataInputRefresh(event.getPlayer());
+					if (event.isCancelled()) {
+						override.put(thisObj, CANCEL_MARKER);
+					} else if (!objectEquals(thisObj, result)) {
+						override.put(thisObj, result);
+					}
+					
+					// Update DataInputStream next time
+					if (!event.isCancelled() && packetID == Packets.Server.KEY_RESPONSE) {
+						packetInjector.scheduleDataInputRefresh(event.getPlayer());
+					}
 				}
+			} catch (Throwable e) {
+				// Minecraft cannot handle this error
+				reporter.reportDetailed(this, "Cannot handle clienet packet.", e, args[0]);
 			}
 		}
 		

ProtocolLib/src/main/java/com/comphenix/protocol/injector/player/InjectedServerConnection.java

@@ -217,7 +217,12 @@ class InjectedServerConnection {
 				// Is this a normal Minecraft object?
 				if (!(inserting instanceof Factory)) {
 					// If so, copy the content of the old element to the new
-					ObjectCloner.copyTo(inserting, replacement, inserting.getClass());
+					try {
+						ObjectCloner.copyTo(inserting, replacement, inserting.getClass());
+					} catch (Throwable e) {
+						reporter.reportDetailed(InjectedServerConnection.this, "Cannot copy old " + inserting + 
+								 				" to new.", e, inserting, replacement);
+					}
 				}
 			}
 			

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

@@ -95,30 +95,34 @@ class NetLoginInjector {
 		PlayerInjector injected = injectedLogins.get(removing);
 		
 		if (injected != null) {
-			PlayerInjector newInjector = null;
-			Player player = injected.getPlayer();
+			try {
+				PlayerInjector newInjector = null;
+				Player player = injected.getPlayer();
 				
-			// Clean up list
-			injectedLogins.remove(removing);
+				// Clean up list
+				injectedLogins.remove(removing);
 				
-			// No need to clean up twice
-			if (injected.isClean())
-				return;
+				// No need to clean up twice
+				if (injected.isClean())
+					return;
 				
-			// Hack to clean up other references
-			newInjector = injectionHandler.getInjectorByNetworkHandler(injected.getNetworkManager());
+				// Hack to clean up other references
+				newInjector = injectionHandler.getInjectorByNetworkHandler(injected.getNetworkManager());
 				
-			// Update NetworkManager
-			if (newInjector == null) {
-				injectionHandler.uninjectPlayer(player);
-			} else {
-				injectionHandler.uninjectPlayer(player, false);
+				// Update NetworkManager
+				if (newInjector == null) {
+					injectionHandler.uninjectPlayer(player);
+				} else {
+					injectionHandler.uninjectPlayer(player, false);
 					
-				if (injected instanceof NetworkObjectInjector)
-					newInjector.setNetworkManager(injected.getNetworkManager(), true);
+					if (injected instanceof NetworkObjectInjector)
+						newInjector.setNetworkManager(injected.getNetworkManager(), true);
+				}
+				
+			} catch (Throwable e) {
+				// Don't leak this to Minecraft
+				reporter.reportDetailed(this, "Cannot cleanup NetLoginHandler.", e, removing);
 			}
-			
-			//logger.warning("Using alternative cleanup method.");
 		}
 	}
 	

ProtocolLib/src/main/java/com/comphenix/protocol/injector/player/PlayerInjector.java

@@ -502,43 +502,48 @@ abstract class PlayerInjector {
 	 * @return The given packet, or the packet replaced by the listeners.
 	 */
 	public Packet handlePacketSending(Packet packet) {
-		// Get the packet ID too
-		Integer id = invoker.getPacketID(packet);
-		Player currentPlayer = player;
+		try {
+			// Get the packet ID too
+			Integer id = invoker.getPacketID(packet);
+			Player currentPlayer = player;
 			
-		// Hack #1: Handle a single scheduled action
-		if (scheduledAction != null) {
-			scheduledAction.run();
-			scheduledAction = null;
-		}
-		// Hack #2
-		if (updateOnLogin) {
-			if (id == Packets.Server.LOGIN) {
-				try {
-					updatedPlayer = getEntityPlayer(getNetHandler()).getBukkitEntity();
-				} catch (IllegalAccessException e) {
-					reporter.reportDetailed(this, "Cannot update player in PlayerEvent.", e, packet);
+			// Hack #1: Handle a single scheduled action
+			if (scheduledAction != null) {
+				scheduledAction.run();
+				scheduledAction = null;
+			}
+			// Hack #2
+			if (updateOnLogin) {
+				if (id == Packets.Server.LOGIN) {
+					try {
+						updatedPlayer = getEntityPlayer(getNetHandler()).getBukkitEntity();
+					} catch (IllegalAccessException e) {
+						reporter.reportDetailed(this, "Cannot update player in PlayerEvent.", e, packet);
+					}
 				}
+				
+				// This will only occur in the NetLoginHandler injection
+				if (updatedPlayer != null)
+					currentPlayer = updatedPlayer;
 			}
 			
-			// This will only occur in the NetLoginHandler injection
-			if (updatedPlayer != null)
-				currentPlayer = updatedPlayer;
-		}
+			// Make sure we're listening
+			if (id != null && hasListener(id)) {
+				// A packet has been sent guys!
+				PacketContainer container = new PacketContainer(id, packet);
+				PacketEvent event = PacketEvent.fromServer(invoker, container, currentPlayer);
+				invoker.invokePacketSending(event);
 				
-		// Make sure we're listening
-		if (id != null && hasListener(id)) {
-			// A packet has been sent guys!
-			PacketContainer container = new PacketContainer(id, packet);
-			PacketEvent event = PacketEvent.fromServer(invoker, container, currentPlayer);
-			invoker.invokePacketSending(event);
+				// Cancelling is pretty simple. Just ignore the packet.
+				if (event.isCancelled())
+					return null;
 				
-			// Cancelling is pretty simple. Just ignore the packet.
-			if (event.isCancelled())
-				return null;
+				// Right, remember to replace the packet again
+				return event.getPacket().getHandle();
+			}
 			
-			// Right, remember to replace the packet again
-			return event.getPacket().getHandle();
+		} catch (Throwable e) {
+			reporter.reportDetailed(this, "Cannot handle server packet.", e, packet);
 		}
 		
 		return packet;