From b691c43c44ff180d10e7d4a9afc83b98551ff586 Mon Sep 17 00:00:00 2001
From: daoge_cmd <3523206925@qq.com>
Date: Sun, 1 Mar 2026 12:16:08 +0800
Subject: Initial commit

---
 Minecraft.World/PreLoginPacket.cpp | 119 +++++++++++++++++++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 Minecraft.World/PreLoginPacket.cpp

(limited to 'Minecraft.World/PreLoginPacket.cpp')

diff --git a/Minecraft.World/PreLoginPacket.cpp b/Minecraft.World/PreLoginPacket.cpp
new file mode 100644
index 00000000..4b474214
--- /dev/null
+++ b/Minecraft.World/PreLoginPacket.cpp
@@ -0,0 +1,119 @@
+#include "stdafx.h"
+#include <iostream>
+#include "PacketListener.h"
+#include "PreloginPacket.h"
+#include "InputOutputStream.h"
+
+
+
+PreLoginPacket::PreLoginPacket() 
+{
+	loginKey = L"";
+	m_playerXuids = NULL;
+	m_dwPlayerCount = 0;
+	m_friendsOnlyBits = 0;
+	m_ugcPlayersVersion = 0;
+	ZeroMemory(m_szUniqueSaveName,m_iSaveNameLen);
+	m_serverSettings = 0;
+	m_hostIndex = 0;
+	m_texturePackId = 0;
+	m_netcodeVersion = 0;
+}
+
+PreLoginPacket::PreLoginPacket(wstring userName) 
+{
+	this->loginKey = userName;
+	m_playerXuids = NULL;
+	m_dwPlayerCount = 0;
+	m_friendsOnlyBits = 0;
+	m_ugcPlayersVersion = 0;
+	ZeroMemory(m_szUniqueSaveName,m_iSaveNameLen);
+	m_serverSettings = 0;
+	m_hostIndex = 0;
+	m_texturePackId = 0;
+	m_netcodeVersion = 0;
+}
+
+PreLoginPacket::PreLoginPacket(wstring userName, PlayerUID *playerXuids, DWORD playerCount, BYTE friendsOnlyBits, DWORD ugcPlayersVersion,char *pszUniqueSaveName, DWORD serverSettings, BYTE hostIndex, DWORD texturePackId) 
+{
+	this->loginKey = userName;
+	m_playerXuids = playerXuids;
+	m_dwPlayerCount = playerCount;
+	m_friendsOnlyBits = friendsOnlyBits;
+	m_ugcPlayersVersion = ugcPlayersVersion;
+	memcpy(m_szUniqueSaveName,pszUniqueSaveName,m_iSaveNameLen);
+	m_serverSettings = serverSettings;
+	m_hostIndex = hostIndex;
+	m_texturePackId = texturePackId;
+	m_netcodeVersion = 0;
+}
+
+PreLoginPacket::~PreLoginPacket()
+{
+	if( m_playerXuids != NULL ) delete [] m_playerXuids;
+}
+
+void PreLoginPacket::read(DataInputStream *dis) //throws IOException 
+{
+	m_netcodeVersion = dis->readShort();
+
+	loginKey = readUtf(dis, 32);
+
+	m_friendsOnlyBits = dis->readByte();
+	m_ugcPlayersVersion = dis->readInt();
+	m_dwPlayerCount = dis->readByte();
+	if( m_dwPlayerCount > 0 )
+	{
+		m_playerXuids = new PlayerUID[m_dwPlayerCount];
+		for(DWORD i = 0; i < m_dwPlayerCount; ++i)
+		{
+			m_playerXuids[i] = dis->readPlayerUID();
+		}
+	}
+	for(DWORD i = 0; i < m_iSaveNameLen; ++i)
+	{
+		m_szUniqueSaveName[i]=dis->readByte();
+	}
+	m_serverSettings = dis->readInt();
+	m_hostIndex = dis->readByte();
+	
+	INT texturePackId = dis->readInt();
+	m_texturePackId = *(DWORD *)&texturePackId;
+
+	// Set the name of the map so we can check it for players banned lists
+	app.SetUniqueMapName((char *)m_szUniqueSaveName);
+}
+
+void PreLoginPacket::write(DataOutputStream *dos) //throws IOException 
+{
+	dos->writeShort(MINECRAFT_NET_VERSION);
+
+	writeUtf(loginKey, dos);
+	
+	dos->writeByte(m_friendsOnlyBits);
+	dos->writeInt(m_ugcPlayersVersion);
+	dos->writeByte((byte)m_dwPlayerCount);
+	for(DWORD i = 0; i < m_dwPlayerCount; ++i)
+	{
+		dos->writePlayerUID( m_playerXuids[i] );
+	}
+
+	app.DebugPrintf("*** PreLoginPacket::write - %s\n",m_szUniqueSaveName);
+	for(DWORD i = 0; i < m_iSaveNameLen; ++i)
+	{
+		dos->writeByte(m_szUniqueSaveName[i]);
+	}
+	dos->writeInt(m_serverSettings);
+	dos->writeByte(m_hostIndex);
+	dos->writeInt(m_texturePackId);
+}
+
+void PreLoginPacket::handle(PacketListener *listener) 
+{
+	listener->handlePreLogin(shared_from_this());
+}
+
+int PreLoginPacket::getEstimatedSize() 
+{
+	return 4 + 4 + (int)loginKey.length() + 4 +14 + 4 + 1 + 4;
+}
-- 
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