Kick clients that declare an unsupported version (#79)

CivPlatform · Aug 16, 2023 · fb21f37 · fb21f37
1 parent fc94b10
commit fb21f37
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Showing 2 changed files with 12 additions and 1 deletion.
diff --git a/server/src/constants.ts b/server/src/constants.ts
@@ -0,0 +1,4 @@
+export const SUPPORTED_VERSIONS = new Set([
+	'2.0.1-1.18.2-fabric',
+	'2.0.1-1.18.2-forge',
+])
diff --git a/server/src/server.ts b/server/src/server.ts
@@ -7,6 +7,7 @@ import { BufReader } from './protocol/BufReader'
 import { BufWriter } from './protocol/BufWriter'
 import { EncryptionResponsePacket } from './protocol/EncryptionResponsePacket'
 import { HandshakePacket } from './protocol/HandshakePacket'
+import { SUPPORTED_VERSIONS } from './constants'
 
 const { PORT = '12312', HOST = '127.0.0.1' } = process.env
 
@@ -215,7 +216,13 @@ export class TcpClient {
 		if (this.cryptoPromise) throw new Error(`Already authenticated`)
 		if (this.verifyToken) throw new Error(`Encryption already started`)
 
-		this.modVersion = packet.modVersion
+		if (!SUPPORTED_VERSIONS.has(packet.modVersion)) {
+			this.kick(
+				'Connected with unsupported version [' + packet.modVersion + ']',
+			)
+			return
+		}
+
 		this.gameAddress = packet.gameAddress
 		this.claimedMojangName = packet.mojangName
 		this.world = packet.world