101 lines
1.9 KiB
JavaScript
101 lines
1.9 KiB
JavaScript
/*!
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* tcp.js - tcp backend for bcoin
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* Copyright (c) 2014-2017, Christopher Jeffrey (MIT License).
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* https://github.com/bcoin-org/bcoin
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*/
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/* eslint prefer-arrow-callback: "off" */
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'use strict';
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const EventEmitter = require('events');
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const net = require('net');
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const socks = require('./socks');
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/**
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* @exports net/tcp
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*/
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const tcp = exports;
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/**
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* Create a TCP socket and connect.
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* @param {Number} port
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* @param {String} host
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* @param {String?} proxy
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* @returns {Object}
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*/
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tcp.createSocket = function createSocket(port, host, proxy) {
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if (proxy)
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return socks.connect(proxy, port, host);
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return net.connect(port, host);
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};
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/**
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* Create a TCP server.
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* @returns {Object}
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*/
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tcp.createServer = function createServer() {
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const server = new net.Server();
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const ee = new EventEmitter();
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ee.listen = function listen(port, host) {
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return new Promise((resolve, reject) => {
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server.once('error', reject);
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server.listen(port, host, () => {
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server.removeListener('error', reject);
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resolve();
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});
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});
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};
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ee.close = function close() {
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return new Promise((resolve, reject) => {
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server.close(wrap(resolve, reject));
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});
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};
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ee.address = function address() {
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return server.address();
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};
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ee.__defineGetter__('maxConnections', function() {
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return server.maxConnections;
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});
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ee.__defineSetter__('maxConnections', function(value) {
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server.maxConnections = value;
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return server.maxConnections;
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});
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server.on('listening', () => {
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ee.emit('listening');
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});
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server.on('connection', (socket) => {
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ee.emit('connection', socket);
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});
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server.on('error', (err) => {
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ee.emit('error', err);
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});
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return ee;
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};
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/*
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* Helpers
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*/
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function wrap(resolve, reject) {
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return function(err, result) {
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if (err) {
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reject(err);
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return;
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}
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resolve(result);
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};
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}
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