53 lines
1.5 KiB
JavaScript
53 lines
1.5 KiB
JavaScript
const dgram = require('dgram'),
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HexUtil = require('./HexUtil');
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class GlobalUdpSocket {
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constructor() {
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this.socket = null;
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this.callbacks = new Set();
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this.debuggingCallbacks = new Set();
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}
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_getSocket() {
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if (!this.socket) {
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const udpSocket = this.socket = dgram.createSocket('udp4');
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udpSocket.unref();
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udpSocket.bind();
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udpSocket.on('message', (buffer, rinfo) => {
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const fromAddress = rinfo.address;
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const fromPort = rinfo.port;
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if (this.debuggingCallbacks.size) {
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console.log(fromAddress + ':' + fromPort + " <--UDP");
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console.log(HexUtil.debugDump(buffer));
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}
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for (const cb of this.callbacks) {
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cb(fromAddress, fromPort, buffer);
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}
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});
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udpSocket.on('error', (e) => {
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if (this.debuggingCallbacks.size) {
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console.log("UDP ERROR: " + e);
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}
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});
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}
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return this.socket;
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}
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send(buffer, address, port) {
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this._getSocket().send(buffer,0,buffer.length,port,address);
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}
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addCallback(callback, debug) {
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this.callbacks.add(callback);
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if (debug) {
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this.debuggingCallbacks.add(callback);
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}
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}
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removeCallback(callback) {
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this.callbacks.delete(callback);
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this.debuggingCallbacks.delete(callback);
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}
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}
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module.exports = GlobalUdpSocket;
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