116 lines
2.7 KiB
JavaScript
116 lines
2.7 KiB
JavaScript
/* jslint node: true */
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'use strict';
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const MenuModule = require('../core/menu_module.js').MenuModule;
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const resetScreen = require('../core/ansi_term.js').resetScreen;
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const async = require('async');
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const _ = require('lodash');
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const net = require('net');
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/*
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Expected configuration block:
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{
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module: telnet_bridge
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...
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config: {
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host: somehost.net
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port: 23
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}
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}
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*/
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// :TODO: BUG: When a client disconnects, it's not handled very well -- the log is spammed with tons of errors
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// :TODO: ENH: Support nodeMax and tooManyArt
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exports.getModule = TelnetBridgeModule;
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exports.moduleInfo = {
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name : 'Telnet Bridge',
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desc : 'Connect to other Telnet Systems',
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author : 'Andrew Pamment',
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};
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function TelnetBridgeModule(options) {
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MenuModule.call(this, options);
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const self = this;
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this.config = options.menuConfig.config;
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this.initSequence = function() {
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let clientTerminated;
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async.series(
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[
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function validateConfig(callback) {
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if(_.isString(self.config.host) &&
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_.isNumber(self.config.port))
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{
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callback(null);
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} else {
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callback(new Error('Configuration is missing required option(s)'));
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}
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},
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function createTelnetBridge(callback) {
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const connectOpts = {
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port : self.config.port,
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host : self.config.host,
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};
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let clientTerminated;
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self.client.term.write(resetScreen());
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self.client.term.write(` Connecting to ${connectOpts.host}, please wait...\n`);
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let bridgeConnection = net.createConnection(connectOpts, () => {
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self.client.log.info(connectOpts, 'Telnet bridge connection established');
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self.client.term.output.pipe(bridgeConnection);
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self.client.once('end', () => {
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self.client.log.info('Connection ended. Terminating connection');
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clientTerminated = true;
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return bridgeConnection.end();
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});
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});
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const restorePipe = function() {
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self.client.term.output.unpipe(bridgeConnection);
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self.client.term.output.resume();
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};
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bridgeConnection.on('data', data => {
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// pass along
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// :TODO: just pipe this as well
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return self.client.term.rawWrite(data);
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});
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bridgeConnection.once('end', () => {
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restorePipe();
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return callback(clientTerminated ? new Error('Client connection terminated') : null);
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});
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bridgeConnection.once('error', err => {
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self.client.log.info(`Telnet bridge connection error: ${err.message}`);
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restorePipe();
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return callback(err);
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});
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}
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],
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err => {
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if(err) {
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self.client.log.warn( { error : err.message }, 'Telnet connection error');
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}
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if(!clientTerminated) {
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self.prevMenu();
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}
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}
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);
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};
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}
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require('util').inherits(TelnetBridgeModule, MenuModule);
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