新增Minecraft版本验证，优化握手和断开连接逻辑

core/src/main/java/com/xujiayao/discord_mc_chat/client/ClientHandler.java

@@ -9,6 +9,7 @@ import com.xujiayao.discord_mc_chat.network.packets.KeepAlivePacket;
 import com.xujiayao.discord_mc_chat.network.packets.LoginSuccessPacket;
 import com.xujiayao.discord_mc_chat.network.packets.Packet;
 import com.xujiayao.discord_mc_chat.utils.CryptUtils;
+import com.xujiayao.discord_mc_chat.utils.EnvironmentUtils;
 import com.xujiayao.discord_mc_chat.utils.i18n.I18nManager;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.channel.SimpleChannelInboundHandler;
@@ -37,7 +38,7 @@ public class ClientHandler extends SimpleChannelInboundHandler<Packet> {
 
 	@Override
 	public void channelActive(ChannelHandlerContext ctx) {
-		ctx.writeAndFlush(new HandshakePacket(client.getServerName(), Constants.VERSION));
+		ctx.writeAndFlush(new HandshakePacket(client.getServerName(), Constants.VERSION, EnvironmentUtils.getMinecraftVersion()));
 	}
 
 	@Override

core/src/main/java/com/xujiayao/discord_mc_chat/network/packets/HandshakePacket.java

@@ -7,10 +7,12 @@ package com.xujiayao.discord_mc_chat.network.packets;
  */
 public class HandshakePacket extends Packet {
 	public String serverName;
-	public String version;
+	public String dmccVersion;
+	public String minecraftVersion;
 
-	public HandshakePacket(String serverName, String version) {
+	public HandshakePacket(String serverName, String dmccVersion, String minecraftVersion) {
 		this.serverName = serverName;
-		this.version = version;
+		this.dmccVersion = dmccVersion;
+		this.minecraftVersion = minecraftVersion;
 	}
 }

core/src/main/java/com/xujiayao/discord_mc_chat/server/ServerHandler.java

@@ -96,10 +96,18 @@ public class ServerHandler extends SimpleChannelInboundHandler<Packet> {
 						}
 					}
 
-					if (!Constants.VERSION.equals(p.version)) {
-						String reason = I18nManager.getDmccTranslation("server.network.disconnect_reasons.version_mismatch", p.version, Constants.VERSION);
-						LOGGER.error(I18nManager.getDmccTranslation("server.network.reject", clientName, reason));
-						ctx.writeAndFlush(new DisconnectPacket("server.network.disconnect_reasons.version_mismatch", p.version, Constants.VERSION));
+					if (!Constants.VERSION.equals(p.dmccVersion)) {
+						String reason = I18nManager.getDmccTranslation("server.network.disconnect_reasons.version_mismatch", "DMCC", p.dmccVersion, Constants.VERSION);
+						LOGGER.error(I18nManager.getDmccTranslation("server.network.reject", p.serverName, reason));
+						ctx.writeAndFlush(new DisconnectPacket("server.network.disconnect_reasons.version_mismatch", "DMCC", p.dmccVersion, Constants.VERSION));
+						ctx.close();
+						return;
+					}
+
+					if (!getMinecraftVersion(p.serverName).equals(p.minecraftVersion)) {
+						String reason = I18nManager.getDmccTranslation("server.network.disconnect_reasons.version_mismatch", "Minecraft", p.minecraftVersion, getMinecraftVersion(p.serverName));
+						LOGGER.error(I18nManager.getDmccTranslation("server.network.reject", p.serverName, reason));
+						ctx.writeAndFlush(new DisconnectPacket("server.network.disconnect_reasons.version_mismatch", "Minecraft", p.minecraftVersion, getMinecraftVersion(p.serverName)));
 						ctx.close();
 						return;
 					}
@@ -157,4 +165,16 @@ public class ServerHandler extends SimpleChannelInboundHandler<Packet> {
 		}
 		return false;
 	}
+
+	private String getMinecraftVersion(String serverName) {
+		JsonNode serversNode = ConfigManager.getConfigNode("multi_server.servers");
+		if (serversNode.isArray()) {
+			for (JsonNode node : serversNode) {
+				if (serverName.equals(node.path("name").asText())) {
+					return node.path("minecraft_version").asText();
+				}
+			}
+		}
+		return "";
+	}
 }

core/src/main/java/com/xujiayao/discord_mc_chat/utils/EnvironmentUtils.java

@@ -29,6 +29,23 @@ public class EnvironmentUtils {
 		return false;
 	}
 
+	/**
+	 * Gets the Minecraft version using reflection.
+	 * Should only be called if running in a Minecraft environment.
+	 *
+	 * @return The Minecraft version as a string.
+	 */
+	public static String getMinecraftVersion() {
+		try {
+			// SharedConstants.getCurrentVersion().name()
+			Class<?> sharedConstantsClass = Class.forName("net.minecraft.SharedConstants");
+			Object worldVersionObject = sharedConstantsClass.getMethod("getCurrentVersion").invoke(null);
+			return (String) worldVersionObject.getClass().getMethod("name").invoke(worldVersionObject);
+		} catch (Exception e) {
+			throw new RuntimeException("Failed to get Minecraft version", e);
+		}
+	}
+
 	/**
 	 * Gets the DMCC version from the template "mode.yml" file in resources.
 	 *

core/src/main/resources/config/config_standalone.yml

@@ -23,6 +23,7 @@ multi_server:
   servers:
     # This list acts as a whitelist. Only clients with a server name defined here are allowed to connect.
     - name: "SMP"
+      minecraft_version: "1.21.10"
       avatar_url: ""
       color: "yellow"
       start_command: "./SMP/start.bat"  # command or url

core/src/main/resources/lang/en_us.yml

@@ -76,7 +76,7 @@ server:
     disconnect_reasons:
       single_server_mode: "DMCC Server is in single_server mode, rejecting any additional client connections."
       not_whitelisted: "Name \"{}\" is not whitelisted."
-      version_mismatch: "Version mismatch. Client: {}, Server: {}"
+      version_mismatch: "{} version mismatch. Client: {}, Server: {}"
       auth_failed: "Authentication failed. Please check your shared secret."
     exception_caught: "Netty caught an exception."
 

core/src/main/resources/lang/zh_cn.yml

@@ -76,7 +76,7 @@ server:
     disconnect_reasons:
       single_server_mode: "DMCC 服务端处于 single_server 模式，拒绝任何额外客户端连接。"
       not_whitelisted: "名称 \"{}\" 不在白名单中。"
-      version_mismatch: "版本不匹配。客户端：{}，服务端：{}"
+      version_mismatch: "{} 版本不匹配。客户端：{}，服务端：{}"
       auth_failed: "验证失败。请检查你的共享密钥。"
     exception_caught: "Netty 捕获到一个异常。"