Add support for native minecraft bedrock protocol, as some bedrock servers apparently don't respond to gamespy3. Fixes #211 (2.0.26)

protocols/minecraftbedrock.js

@@ -0,0 +1,67 @@
+const Core = require('./core');
+
+class MinecraftBedrock extends Core {
+    constructor() {
+        super();
+        this.byteorder = 'be';
+    }
+
+    async run(state) {
+        const bufs = [
+            Buffer.from([0x01]), // Message ID, ID_UNCONNECTED_PING
+            Buffer.from('0000000000000000', 'hex'), // Nonce / timestamp
+            Buffer.from('00ffff00fefefefefdfdfdfd12345678', 'hex'), // Magic
+            Buffer.from('0000000000000000', 'hex') // Cliend GUID
+        ];
+
+        return await this.udpSend(Buffer.concat(bufs), buffer => {
+            const reader = this.reader(buffer);
+
+            const messageId = reader.uint(1);
+            if (messageId !== 0x1c) {
+                throw new Error('Invalid message id');
+            }
+
+            const nonce = reader.part(8).toString('hex'); // should match the nonce we sent
+            this.logger.debug('Nonce: ' + nonce);
+
+            state.raw.guid = reader.part(8).toString('hex');
+
+            const magic = reader.part(16).toString('hex');
+            this.logger.debug('Magic value: ' + magic);
+
+            const statusLen = reader.uint(2);
+            if (reader.remaining() !== statusLen) {
+                throw new Error('Invalid status length: ' + reader.remaining() + ' vs ' + statusLen);
+            }
+
+            const statusStr = reader.rest().toString('utf8');
+            this.logger.debug('Raw status str: ' + statusStr);
+
+            const split = statusStr.split(';');
+            if (split.length < 12) {
+                throw new Error('Missing enough chunks in status str');
+            }
+
+            let i = 0;
+            state.raw.edition = split[i++];
+            state.name = split[i++];
+            state.raw.protocolVersion = split[i++];
+            state.raw.mcVersion = split[i++];
+            state.players = parseInt(split[i++]);
+            state.maxplayers = parseInt(split[i++]);
+            state.raw.serverId = split[i++];
+            state.map = split[i++];
+            state.raw.gameMode = split[i++];
+            state.raw.nintendoOnly = !!parseInt(split[i++]);
+            state.raw.ipv4Port = split[i++];
+            state.raw.ipv6Port = split[i++];
+
+            return true;
+        });
+
+    }
+
+}
+
+module.exports = MinecraftBedrock;