From 77b5b16de414f0ecd922a4eb51df4aea0a204358 Mon Sep 17 00:00:00 2001
From: str1k3r <115313679+S1l3ntStr1ke87@users.noreply.github.com>
Date: Mon, 25 May 2026 05:04:04 -0400
Subject: [PATCH] Fix: Splitscreen for proper backend detection

---
 .../Windows64/Network/WinsockNetLayer.cpp            | 12 +++++++-----
 Minecraft.Client/Windows64/Network/WinsockNetLayer.h |  6 ++++--
 2 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/Minecraft.Client/Windows64/Network/WinsockNetLayer.cpp b/Minecraft.Client/Windows64/Network/WinsockNetLayer.cpp
index 8fb570bb..2e07f4ff 100644
--- a/Minecraft.Client/Windows64/Network/WinsockNetLayer.cpp
+++ b/Minecraft.Client/Windows64/Network/WinsockNetLayer.cpp
@@ -1,5 +1,6 @@
-// Code implemented by LCEMP, credit if used on other repos
-// https://github.com/LCEMP/LCEMP
+// Written by DrperkyLegit, Improved upon by Str1k3r/MCLEMP
+// https://github.com/DrPerkyLegit
+// https://github.com/mclemp
 
 #include "stdafx.h"
 
@@ -390,7 +391,7 @@ bool WinsockNetLayer::JoinGame(const char* ip, int port)
 	std::string authToken = Windows64Launcher::GetAuthenticationToken();
 #endif
 	std::string hostname(ip);
-	std::string req = "JOIN " + authToken + " 0 " + hostname + "\n";
+	std::string req = "JOIN " + authToken + " 0 " + hostname + " 0\n";
 	send(s_hostConnectionSocket, req.c_str(), (int)req.length(), 0);
 
 	BYTE assignBuf[1];
@@ -550,7 +551,7 @@ DWORD WINAPI WinsockNetLayer::JoinThreadProc(LPVOID param)
 		std::string authToken = Windows64Launcher::GetAuthenticationToken();
 #endif
 		std::string hostname(s_joinIP);
-		std::string req = "JOIN " + authToken + " 0 " + hostname + "\n";
+		std::string req = "JOIN " + authToken + " 0 " + hostname + " 0\n";
 		send(sock, req.c_str(), (int)req.length(), 0);
 
 		BYTE assignBuf[1];
@@ -1209,7 +1210,8 @@ bool WinsockNetLayer::JoinSplitScreen(int padIndex, BYTE* outSmallId)
 	std::string authToken = Windows64Launcher::GetAuthenticationToken();
 #endif
 	std::string hostname(g_Win64MultiplayerIP);
-	std::string req = "JOIN " + authToken + " 0 " + hostname + "\n";
+	std::string req = "JOIN " + authToken + " 0 " + hostname + " 1\n";
+	app.DebugPrintf("Win64 LAN: Sending JOIN request: %s", req.c_str());
 	send(sock, req.c_str(), (int)req.length(), 0);
 
 	BYTE assignBuf[1];
diff --git a/Minecraft.Client/Windows64/Network/WinsockNetLayer.h b/Minecraft.Client/Windows64/Network/WinsockNetLayer.h
index 9fc1e559..0029a3dd 100644
--- a/Minecraft.Client/Windows64/Network/WinsockNetLayer.h
+++ b/Minecraft.Client/Windows64/Network/WinsockNetLayer.h
@@ -1,5 +1,7 @@
-// Code implemented by LCEMP, credit if used on other repos
-// https://github.com/LCEMP/LCEMP
+// Written by DrperkyLegit, Improved upon by Str1k3r/MCLEMP
+// https://github.com/DrPerkyLegit
+// https://github.com/mclemp
+
 #pragma once
 
 #ifdef _WINDOWS64