69 lines
2.2 KiB
JavaScript
69 lines
2.2 KiB
JavaScript
const dgram = require('dgram');
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const HexUtil = require('./HexUtil');
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const Logger = require('./Logger');
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const util = require('util');
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class GlobalUdpSocket {
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constructor({port}) {
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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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this.logger = new Logger();
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this.port = port;
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}
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async _getSocket() {
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if (!this.socket) {
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const udpSocket = dgram.createSocket({
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type: 'udp4',
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reuseAddr: true
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});
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udpSocket.unref();
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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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this.logger.debug(log => {
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log(fromAddress + ':' + fromPort + " <--UDP(" + this.port + ")");
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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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this.logger.debug("UDP ERROR:", e);
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});
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await util.promisify(udpSocket.bind).bind(udpSocket)(this.port);
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this.port = udpSocket.address().port;
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this.socket = udpSocket;
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}
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return this.socket;
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}
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async send(buffer, address, port, debug) {
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const socket = await this._getSocket();
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if (debug) {
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this.logger._print(log => {
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log(address + ':' + port + " UDP(" + this.port + ")-->");
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log(HexUtil.debugDump(buffer));
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});
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}
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await util.promisify(socket.send).bind(socket)(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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this.logger.debugEnabled = true;
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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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this.logger.debugEnabled = this.debuggingCallbacks.size > 0;
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}
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}
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module.exports = GlobalUdpSocket;
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