102 lines
2.2 KiB
JavaScript
102 lines
2.2 KiB
JavaScript
module.exports = require('./core').extend({
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init: function() {
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this._super();
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this.sessionId = 1;
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this.encoding = 'latin1';
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this.byteorder = 'be';
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},
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run: function() {
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var self = this;
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this.sendPacket(9,false,false,false,function(buffer) {
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var reader = self.reader(buffer);
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reader.skip(5);
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var challenge = reader.string();
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self.sendPacket(0,challenge,new Buffer([0,0,0,0]),true,function(buffer) {
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var reader = self.reader(buffer);
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var state = {
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players:[]
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};
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while(!reader.done()) {
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var key = reader.string();
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if(!key) break;
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var value = reader.string();
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state[key] = value;
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}
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var mode = '';
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while(!reader.done()) {
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var mode = reader.string();
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reader.skip(1);
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while(!reader.done()) {
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var item = reader.string();
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if(!item) break;
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if(mode.substr(-1) == '_') {
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// players
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state.players.push({name:item})
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}
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}
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}
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self.finish(state);
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});
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});
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},
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sendPacket: function(type,challenge,payload,assemble,c) {
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var self = this;
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var challengeLength = challenge === false ? 0 : 4;
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var payloadLength = payload ? payload.length : 0;
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var b = new Buffer(7 + challengeLength + payloadLength);
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b.writeUInt8(0xFE, 0);
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b.writeUInt8(0xFD, 1);
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b.writeUInt8(type, 2);
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b.writeUInt32BE(this.sessionId, 3);
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if(challengeLength) b.writeUInt32BE(challenge, 7);
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if(payloadLength) payload.copy(b, 7+challengeLength);
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var numPackets = 0;
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var packets = {};
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this.udpSend(b,function(buffer) {
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var iType = buffer.readUInt8(0);
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if(iType != type) return;
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var iSessionId = buffer.readUInt32BE(1);
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if(iSessionId != self.sessionId) return;
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if(!assemble) {
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c(buffer);
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return true;
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}
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var id = buffer.readUInt16LE(14);
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var last = (id & 0x80);
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id = id & 0x7f;
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if(last) numPackets = id+1;
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packets[id] = buffer.slice(16);
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if(!numPackets || Object.keys(packets).length != numPackets) return;
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// assemble the parts
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var list = [];
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for(var i = 0; i < numPackets; i++) {
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if(!(i in packets)) {
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self.error('Missing packet #'+i);
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return true;
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}
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list.push(packets[i]);
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}
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var assembled = Buffer.concat(list);
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c(assembled);
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return true;
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});
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}
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});
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