add CrashH

src/main/java/ac/grim/grimac/checks/impl/crash/CrashH.java

@@ -0,0 +1,47 @@
+package ac.grim.grimac.checks.impl.crash;
+
+import ac.grim.grimac.checks.Check;
+import ac.grim.grimac.checks.CheckData;
+import ac.grim.grimac.checks.type.PacketCheck;
+import ac.grim.grimac.player.GrimPlayer;
+import com.github.retrooper.packetevents.event.PacketReceiveEvent;
+import com.github.retrooper.packetevents.protocol.packettype.PacketType;
+import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientTabComplete;
+
+@CheckData(name = "CrashH")
+public class CrashH extends Check implements PacketCheck {
+
+    public CrashH(GrimPlayer player) {
+        super(player);
+    }
+
+    @Override
+    public void onPacketReceive(PacketReceiveEvent event) {
+        if (event.getPacketType() == PacketType.Play.Client.TAB_COMPLETE) {
+            WrapperPlayClientTabComplete wrapper = new WrapperPlayClientTabComplete(event);
+            String text = wrapper.getText();
+            final int length = text.length();
+            // general length limit
+            if (length > 2048) {
+                if (shouldModifyPackets()) {
+                    event.setCancelled(true);
+                    player.onPacketCancel();
+                }
+                flagAndAlert("(length) length=" + length);
+                return;
+            }
+            // paper's patch
+            final int index;
+            if (text.length() > 64 && ((index = text.indexOf(' ')) == -1 || index >= 64)) {
+                if (shouldModifyPackets()) {
+                    event.setCancelled(true);
+                    player.onPacketCancel();
+                }
+                flagAndAlert("(invalid) length=" + length);
+                return;
+            }
+        }
+    }
+
+
+}

src/main/java/ac/grim/grimac/manager/CheckManager.java

@@ -143,6 +143,7 @@ public CheckManager(GrimPlayer player) {
                 .put(CrashE.class, new CrashE(player))
                 .put(CrashF.class, new CrashF(player))
                 .put(CrashG.class, new CrashG(player))
+                .put(CrashH.class, new CrashH(player))
                 .put(ExploitA.class, new ExploitA(player))
                 .put(ExploitB.class, new ExploitB(player))
                 .put(VehicleTimer.class, new VehicleTimer(player))