77 lines
2.7 KiB
JavaScript
77 lines
2.7 KiB
JavaScript
const Core = require('./core');
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class MinecraftBedrock extends Core {
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constructor() {
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super();
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this.byteorder = 'be';
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}
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async run(state) {
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const bufs = [
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Buffer.from([0x01]), // Message ID, ID_UNCONNECTED_PING
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Buffer.from('1122334455667788', 'hex'), // Nonce / timestamp
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Buffer.from('00ffff00fefefefefdfdfdfd12345678', 'hex'), // Magic
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Buffer.from('0000000000000000', 'hex') // Cliend GUID
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];
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return await this.udpSend(Buffer.concat(bufs), buffer => {
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const reader = this.reader(buffer);
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const messageId = reader.uint(1);
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if (messageId !== 0x1c) {
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this.logger.debug('Skipping packet, invalid message id');
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return;
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}
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const nonce = reader.part(8).toString('hex'); // should match the nonce we sent
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this.logger.debug('Nonce: ' + nonce);
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if (nonce !== '1122334455667788') {
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this.logger.debug('Skipping packet, invalid nonce');
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return;
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}
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// These 8 bytes are identical to the serverId string we receive in decimal below
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reader.skip(8);
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const magic = reader.part(16).toString('hex');
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this.logger.debug('Magic value: ' + magic);
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if (magic !== '00ffff00fefefefefdfdfdfd12345678') {
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this.logger.debug('Skipping packet, invalid magic');
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return;
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}
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const statusLen = reader.uint(2);
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if (reader.remaining() !== statusLen) {
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throw new Error('Invalid status length: ' + reader.remaining() + ' vs ' + statusLen);
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}
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const statusStr = reader.rest().toString('utf8');
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this.logger.debug('Raw status str: ' + statusStr);
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const split = statusStr.split(';');
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if (split.length < 6) {
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throw new Error('Missing enough chunks in status str');
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}
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state.raw.edition = split.shift();
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state.name = split.shift();
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state.raw.protocolVersion = split.shift();
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state.raw.mcVersion = split.shift();
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state.players.setNum(parseInt(split.shift()));
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state.maxplayers = parseInt(split.shift());
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if (split.length) state.raw.serverId = split.shift();
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if (split.length) state.map = split.shift();
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if (split.length) state.raw.gameMode = split.shift();
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if (split.length) state.raw.nintendoOnly = !!parseInt(split.shift());
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if (split.length) state.raw.ipv4Port = split.shift();
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if (split.length) state.raw.ipv6Port = split.shift();
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return true;
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});
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}
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}
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module.exports = MinecraftBedrock;
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