AntiCrash (#225)

2023-02-12 00:08:42 +08:00
parent 37113decea
commit a48c7b3127
3 changed files with 63 additions and 0 deletions
--- a/src/main/java/anticope/rejects/modules/AntiCrash.java
+++ b/src/main/java/anticope/rejects/modules/AntiCrash.java
@@ -0,0 +1,61 @@
+package anticope.rejects.modules;
+
+import anticope.rejects.MeteorRejectsAddon;
+import meteordevelopment.meteorclient.events.packets.PacketEvent;
+import meteordevelopment.meteorclient.settings.BoolSetting;
+import meteordevelopment.meteorclient.settings.Setting;
+import meteordevelopment.meteorclient.settings.SettingGroup;
+import meteordevelopment.meteorclient.systems.modules.Module;
+import meteordevelopment.orbit.EventHandler;
+import net.minecraft.network.packet.s2c.play.EntityVelocityUpdateS2CPacket;
+import net.minecraft.network.packet.s2c.play.ExplosionS2CPacket;
+import net.minecraft.network.packet.s2c.play.ParticleS2CPacket;
+import net.minecraft.network.packet.s2c.play.PlayerPositionLookS2CPacket;
+
+public class AntiCrash extends Module {
+    private final SettingGroup sgGeneral = settings.getDefaultGroup();
+
+    private final Setting<Boolean> log = sgGeneral.add(new BoolSetting.Builder()
+            .name("log")
+            .description("Logs when crash packet detected.")
+            .defaultValue(false)
+            .build()
+    );
+
+    public AntiCrash() {
+        super(MeteorRejectsAddon.CATEGORY, "anti-crash", "Attempts to cancel packets that may crash the client.");
+    }
+
+    @EventHandler
+    private void onPacketReceive(PacketEvent.Receive event) {
+        if (event.packet instanceof ExplosionS2CPacket packet) {
+            if (/* outside of world */ packet.getX() > 30_000_000 || packet.getY() > 30_000_000 || packet.getZ() > 30_000_000 || packet.getX() < -30_000_000 || packet.getY() < -30_000_000 || packet.getZ() < -30_000_000 ||
+                    // power too high
+                    packet.getRadius() > 1000 ||
+                    // too many blocks
+                    packet.getAffectedBlocks().size() > 100_000 ||
+                    // too much knockback
+                    packet.getPlayerVelocityX() > 30_000_000 || packet.getPlayerVelocityY() > 30_000_000 || packet.getPlayerVelocityZ() > 30_000_000
+                    // knockback can be negative?
+                    || packet.getPlayerVelocityX() < -30_000_000 || packet.getPlayerVelocityY() < -30_000_000 || packet.getPlayerVelocityZ() < -30_000_000
+            ) cancel(event);
+        } else if (event.packet instanceof ParticleS2CPacket packet) {
+            // too many particles
+            if (packet.getCount() > 100_000) cancel(event);
+        } else if (event.packet instanceof PlayerPositionLookS2CPacket packet) {
+            // out of world movement
+            if (packet.getX() > 30_000_000 || packet.getY() > 30_000_000 || packet.getZ() > 30_000_000 || packet.getX() < -30_000_000 || packet.getY() < -30_000_000 || packet.getZ() < -30_000_000)
+                cancel(event);
+        } else if (event.packet instanceof EntityVelocityUpdateS2CPacket packet) {
+            // velocity
+            if (packet.getVelocityX() > 30_000_000 || packet.getVelocityY() > 30_000_000 || packet.getVelocityZ() > 30_000_000
+                    || packet.getVelocityX() < -30_000_000 || packet.getVelocityY() < -30_000_000 || packet.getVelocityZ() < -30_000_000
+            ) cancel(event);
+        }
+    }
+
+    private void cancel(PacketEvent.Receive event) {
+        if (log.get()) warning("Server attempts to crash you");
+        event.cancel();
+    }
+}