From 7816e40bd7b8cee096402b9068d179a88a6ff2ff Mon Sep 17 00:00:00 2001
From: Big-Iron-Cheems <52252627+Big-Iron-Cheems@users.noreply.github.com>
Date: Wed, 15 Jul 2026 12:07:18 +0200
Subject: [PATCH] feat: replace AddressCheck with allow-all implementation

Tested via successful connection to `play.6b6t.org`
---
 .../meteorclient/mixin/AddressCheckMixin.java | 34 +++++++++++++++++++
 src/main/resources/meteor-client.mixins.json  |  1 +
 2 files changed, 35 insertions(+)
 create mode 100644 src/main/java/meteordevelopment/meteorclient/mixin/AddressCheckMixin.java

diff --git a/src/main/java/meteordevelopment/meteorclient/mixin/AddressCheckMixin.java b/src/main/java/meteordevelopment/meteorclient/mixin/AddressCheckMixin.java
new file mode 100644
index 0000000000..06a4f232d3
--- /dev/null
+++ b/src/main/java/meteordevelopment/meteorclient/mixin/AddressCheckMixin.java
@@ -0,0 +1,34 @@
+/*
+ * This file is part of the Meteor Client distribution (https://github.com/MeteorDevelopment/meteor-client).
+ * Copyright (c) Meteor Development.
+ */
+
+package meteordevelopment.meteorclient.mixin;
+
+import net.minecraft.client.multiplayer.resolver.AddressCheck;
+import net.minecraft.client.multiplayer.resolver.ResolvedServerAddress;
+import net.minecraft.client.multiplayer.resolver.ServerAddress;
+import org.jspecify.annotations.NullMarked;
+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.CallbackInfoReturnable;
+
+@NullMarked
+@Mixin(AddressCheck.class)
+public interface AddressCheckMixin {
+    @Inject(method = "createFromService", at = @At("HEAD"), cancellable = true)
+    private static void onCreateFromService(CallbackInfoReturnable<AddressCheck> cir) {
+        cir.setReturnValue(new AddressCheck() {
+            @Override
+            public boolean isAllowed(ResolvedServerAddress address) {
+                return true;
+            }
+
+            @Override
+            public boolean isAllowed(ServerAddress address) {
+                return true;
+            }
+        });
+    }
+}
diff --git a/src/main/resources/meteor-client.mixins.json b/src/main/resources/meteor-client.mixins.json
index 6a198b780f..968a4145d1 100644
--- a/src/main/resources/meteor-client.mixins.json
+++ b/src/main/resources/meteor-client.mixins.json
@@ -16,6 +16,7 @@
     "AbstractMountInventoryMenuAccessor",
     "AbstractSignEditScreenAccessor",
     "AbstractSignRendererMixin",
+    "AddressCheckMixin",
     "ArmorStandRendererMixin",
     "AttackRangeMixin",
     "AvatarRendererMixin",