node-gamedig/protocols/samp.js
2021-12-09 18:08:36 -06:00

110 lines
3.8 KiB
JavaScript

const Core = require('./core');
class Samp extends Core {
constructor() {
super();
this.encoding = 'win1252';
this.magicHeader = 'SAMP';
this.responseMagicHeader = null;
this.isVcmp = false;
}
async run(state) {
// read info
{
const reader = await this.sendPacket('i');
if (this.isVcmp) {
const consumed = reader.part(12);
state.raw.version = this.reader(consumed).string();
}
state.password = !!reader.uint(1);
state.raw.numplayers = reader.uint(2);
state.maxplayers = reader.uint(2);
state.name = reader.pascalString(4);
state.raw.gamemode = reader.pascalString(4);
state.raw.map = reader.pascalString(4);
}
// read rules
if (!this.isVcmp) {
const reader = await this.sendPacket('r');
const ruleCount = reader.uint(2);
state.raw.rules = {};
for(let i = 0; i < ruleCount; i++) {
const key = reader.pascalString(1);
const value = reader.pascalString(1);
state.raw.rules[key] = value;
}
}
// read players
// don't even bother if > 100 players, because the server won't respond
let gotPlayerData = false;
if (state.raw.numplayers < 100) {
if (this.isVcmp) {
const reader = await this.sendPacket('c', true);
if (reader !== null) {
gotPlayerData = true;
const playerCount = reader.uint(2);
for(let i = 0; i < playerCount; i++) {
const player = {};
player.name = reader.pascalString(1);
state.players.push(player);
}
}
} else {
const reader = await this.sendPacket('d', true);
if (reader !== null) {
gotPlayerData = true;
const playerCount = reader.uint(2);
for(let i = 0; i < playerCount; i++) {
const player = {};
player.id = reader.uint(1);
player.name = reader.pascalString(1);
player.score = reader.int(4);
player.ping = reader.uint(4);
state.players.push(player);
}
}
}
}
if (!gotPlayerData) {
state.players.setNum(state.raw.numplayers);
}
}
async sendPacket(type,allowTimeout) {
const outBuffer = Buffer.alloc(11);
outBuffer.write(this.magicHeader,0, 4);
const ipSplit = this.options.address.split('.');
outBuffer.writeUInt8(parseInt(ipSplit[0]),4);
outBuffer.writeUInt8(parseInt(ipSplit[1]),5);
outBuffer.writeUInt8(parseInt(ipSplit[2]),6);
outBuffer.writeUInt8(parseInt(ipSplit[3]),7);
outBuffer.writeUInt16LE(this.options.port,8);
outBuffer.writeUInt8(type.charCodeAt(0),10);
const checkBuffer = Buffer.from(outBuffer);
if (this.responseMagicHeader) {
checkBuffer.write(this.responseMagicHeader, 0, 4);
}
return await this.udpSend(
outBuffer,
(buffer) => {
const reader = this.reader(buffer);
for(let i = 0; i < checkBuffer.length; i++) {
if(checkBuffer.readUInt8(i) !== reader.uint(1)) return;
}
return reader;
},
() => {
if(allowTimeout) {
return null;
}
}
);
}
}
module.exports = Samp;