90 lines
2.9 KiB
JavaScript
90 lines
2.9 KiB
JavaScript
const Core = require('./core');
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class Samp extends Core {
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constructor() {
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super();
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this.encoding = 'win1252';
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}
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async run(state) {
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// read info
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{
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const reader = await this.sendPacket('i');
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state.password = !!reader.uint(1);
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state.raw.numplayers = reader.uint(2);
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state.maxplayers = reader.uint(2);
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state.name = this.readString(reader,4);
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state.raw.gamemode = this.readString(reader,4);
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this.map = this.readString(reader,4);
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}
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// read rules
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{
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const reader = await this.sendPacket('r');
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const ruleCount = reader.uint(2);
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state.raw.rules = {};
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for(let i = 0; i < ruleCount; i++) {
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const key = this.readString(reader,1);
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const value = this.readString(reader,1);
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state.raw.rules[key] = value;
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}
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if('mapname' in state.raw.rules)
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state.map = state.raw.rules.mapname;
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}
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// read players
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{
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const reader = await this.sendPacket('d', true);
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if (reader !== null) {
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const playerCount = reader.uint(2);
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for(let i = 0; i < playerCount; i++) {
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const player = {};
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player.id = reader.uint(1);
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player.name = this.readString(reader,1);
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player.score = reader.int(4);
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player.ping = reader.uint(4);
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state.players.push(player);
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}
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} else {
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for(let i = 0; i < state.raw.numplayers; i++) {
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state.players.push({});
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}
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}
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}
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}
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readString(reader,lenBytes) {
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const length = reader.uint(lenBytes);
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if(!length) return '';
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return reader.string({length:length});
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}
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async sendPacket(type,allowTimeout) {
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const outBuffer = Buffer.alloc(11);
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outBuffer.writeUInt32BE(0x53414D50,0);
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const ipSplit = this.options.address.split('.');
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outBuffer.writeUInt8(parseInt(ipSplit[0]),4);
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outBuffer.writeUInt8(parseInt(ipSplit[1]),5);
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outBuffer.writeUInt8(parseInt(ipSplit[2]),6);
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outBuffer.writeUInt8(parseInt(ipSplit[3]),7);
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outBuffer.writeUInt16LE(this.options.port,8);
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outBuffer.writeUInt8(type.charCodeAt(0),10);
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return await this.udpSend(
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outBuffer,
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(buffer) => {
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const reader = this.reader(buffer);
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for(let i = 0; i < outBuffer.length; i++) {
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if(outBuffer.readUInt8(i) !== reader.uint(1)) return;
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}
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return reader;
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},
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() => {
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if(allowTimeout) {
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return null;
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}
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}
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);
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}
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}
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module.exports = Samp;
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