Added packet send and receive listeners

src/main/java/baritone/bot/GameEventHandler.java

@@ -102,6 +102,16 @@ public final class GameEventHandler implements IGameEventListener {
         dispatch(behavior -> behavior.onWorldEvent(event));
     }
 
+    @Override
+    public void onSendPacket(PacketEvent event) {
+        dispatch(behavior -> behavior.onSendPacket(event));
+    }
+
+    @Override
+    public void onReceivePacket(PacketEvent event) {
+        dispatch(behavior -> behavior.onReceivePacket(event));
+    }
+
     private void dispatch(Consumer<Behavior> dispatchFunction) {
         Baritone.INSTANCE.getBehaviors().stream().filter(Behavior::isEnabled).forEach(dispatchFunction);
     }

src/main/java/baritone/bot/event/AbstractGameEventListener.java

@@ -7,9 +7,6 @@ import baritone.bot.event.events.*;
  * overridden with empty bodies, allowing inheritors of this class to choose
  * which events they would like to listen in on.
  *
- * Has no implementors at the moment, but will likely be used with the
- * manager/behavior system is ported over to the new system.
- *
  * @see IGameEventListener
  *
  * @author Brady
@@ -37,4 +34,10 @@ public interface AbstractGameEventListener extends IGameEventListener {
 
     @Override
     default void onWorldEvent(WorldEvent event) {}
+
+    @Override
+    default void onSendPacket(PacketEvent event) {}
+
+    @Override
+    default void onReceivePacket(PacketEvent event) {}
 }

src/main/java/baritone/bot/event/IGameEventListener.java

@@ -1,11 +1,14 @@
 package baritone.bot.event;
 
 import baritone.bot.event.events.*;
+import io.netty.util.concurrent.GenericFutureListener;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.entity.EntityPlayerSP;
 import net.minecraft.client.multiplayer.WorldClient;
 import net.minecraft.client.renderer.EntityRenderer;
 import net.minecraft.client.settings.GameSettings;
+import net.minecraft.network.NetworkManager;
+import net.minecraft.network.Packet;
 
 /**
  * @author Brady
@@ -40,7 +43,6 @@ public interface IGameEventListener {
      */
     void onSendChatMessage(ChatEvent event);
 
-
     /**
      * Runs before and after whenever a chunk is either loaded, unloaded, or populated.
      *
@@ -63,4 +65,18 @@ public interface IGameEventListener {
      * @see Minecraft#loadWorld(WorldClient, String)
      */
     void onWorldEvent(WorldEvent event);
+
+    /**
+     * Runs before a outbound packet is sent
+     *
+     * @see NetworkManager#dispatchPacket(Packet, GenericFutureListener[])
+     */
+    void onSendPacket(PacketEvent event);
+
+    /**
+     * Runs before an inbound packet is processed
+     *
+     * @see NetworkManager#dispatchPacket(Packet, GenericFutureListener[])
+     */
+    void onReceivePacket(PacketEvent event);
 }

src/main/java/baritone/bot/event/events/PacketEvent.java

@@ -0,0 +1,20 @@
+package baritone.bot.event.events;
+
+import net.minecraft.network.Packet;
+
+/**
+ * @author Brady
+ * @since 8/6/2018 9:31 PM
+ */
+public final class PacketEvent {
+
+    private final Packet<?> packet;
+
+    public PacketEvent(Packet<?> packet) {
+        this.packet = packet;
+    }
+
+    public final Packet<?> getPacket() {
+        return this.packet;
+    }
+}

src/main/java/baritone/launch/mixins/MixinNetworkManager.java

@@ -0,0 +1,40 @@
+package baritone.launch.mixins;
+
+import baritone.bot.Baritone;
+import baritone.bot.event.events.PacketEvent;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.util.concurrent.Future;
+import io.netty.util.concurrent.GenericFutureListener;
+import net.minecraft.network.NetworkManager;
+import net.minecraft.network.Packet;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+/**
+ * @author Brady
+ * @since 8/6/2018 9:30 PM
+ */
+@Mixin(NetworkManager.class)
+public class MixinNetworkManager {
+
+    @Inject(
+            method = "dispatchPacket",
+            at = @At("HEAD")
+    )
+    private void dispatchPacket(Packet<?> inPacket, final GenericFutureListener<? extends Future<? super Void >>[] futureListeners, CallbackInfo ci) {
+        Baritone.INSTANCE.getGameEventHandler().onSendPacket(new PacketEvent(inPacket));
+    }
+
+    @Inject(
+            method = "channelRead0",
+            at = @At(
+                    value = "INVOKE",
+                    target = "net/minecraft/network/Packet.processPacket(Lnet/minecraft/network/INetHandler;)V"
+            )
+    )
+    private void preProcessPacket(ChannelHandlerContext context, Packet<?> packet, CallbackInfo ci) {
+        Baritone.INSTANCE.getGameEventHandler().onReceivePacket(new PacketEvent(packet));
+    }
+}

src/main/resources/mixins.baritone.json

@@ -15,6 +15,7 @@
     "MixinMain",
     "MixinMinecraft",
     "MixinNetHandlerPlayClient",
+    "MixinNetworkManager",
     "MixinWorldClient",
 
     "accessor.IAnvilChunkLoader",