MeshCentral/firebase.js

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/**
* @description MeshCentral Firebase communication module
* @author Ylian Saint-Hilaire
* @copyright Intel Corporation 2018-2021
* @license Apache-2.0
* @version v0.0.1
*/
/*xjslint node: true */
/*xjslint plusplus: true */
/*xjslint maxlen: 256 */
/*jshint node: true */
/*jshint strict: false */
/*jshint esversion: 6 */
"use strict";
// Construct the Firebase object
module.exports.CreateFirebase = function (parent, senderid, serverkey) {
var obj = {};
obj.messageId = 0;
obj.relays = {};
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obj.stats = {
mode: "Real",
sent: 0,
sendError: 0,
received: 0,
receivedNoRoute: 0,
receivedBadArgs: 0
}
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const Sender = require('node-xcs').Sender;
const Message = require('node-xcs').Message;
const Notification = require('node-xcs').Notification;
const xcs = new Sender(senderid, serverkey);
var tokenToNodeMap = {} // Token --> { nid: nodeid, mid: meshid }
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// Setup logging
if (parent.config.firebase && (parent.config.firebase.log === true)) {
obj.logpath = parent.path.join(parent.datapath, 'firebase.txt');
obj.log = function (msg) { try { parent.fs.appendFileSync(obj.logpath, new Date().toLocaleString() + ': ' + msg + '\r\n'); } catch (ex) { console.log('ERROR: Unable to write to firebase.txt.'); } }
} else {
obj.log = function () { }
}
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// Messages received from client (excluding receipts)
xcs.on('message', function (messageId, from, data, category) {
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const jsonData = JSON.stringify(data);
obj.log('Firebase-Message: ' + jsonData);
parent.debug('email', 'Firebase-Message: ' + jsonData);
if (typeof data.r == 'string') {
// Lookup push relay server
parent.debug('email', 'Firebase-RelayRoute: ' + data.r);
const wsrelay = obj.relays[data.r];
if (wsrelay != null) {
delete data.r;
try { wsrelay.send(JSON.stringify({ from: from, data: data, category: category })); } catch (ex) { }
}
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} else {
// Lookup node information from the cache
var ninfo = tokenToNodeMap[from];
if (ninfo == null) { obj.stats.receivedNoRoute++; return; }
if ((data != null) && (data.con != null) && (data.s != null)) { // Console command
obj.stats.received++;
parent.webserver.routeAgentCommand({ action: 'msg', type: 'console', value: data.con, sessionid: data.s }, ninfo.did, ninfo.nid, ninfo.mid);
} else {
obj.stats.receivedBadArgs++;
}
}
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});
// Only fired for messages where options.delivery_receipt_requested = true
/*
xcs.on('receipt', function (messageId, from, data, category) { console.log('Firebase-Receipt', messageId, from, data, category); });
xcs.on('connected', function () { console.log('Connected'); });
xcs.on('disconnected', function () { console.log('disconnected'); });
xcs.on('online', function () { console.log('online'); });
xcs.on('error', function (e) { console.log('error', e); });
xcs.on('message-error', function (e) { console.log('message-error', e); });
*/
xcs.start();
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obj.log('CreateFirebase-Setup');
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parent.debug('email', 'CreateFirebase-Setup');
// EXAMPLE
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//var payload = { notification: { title: command.title, body: command.msg }, data: { url: obj.msgurl } };
//var options = { priority: 'High', timeToLive: 5 * 60 }; // TTL: 5 minutes, priority 'Normal' or 'High'
obj.sendToDevice = function (node, payload, options, func) {
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if (typeof node == 'string') {
parent.db.Get(node, function (err, docs) { if ((err == null) && (docs != null) && (docs.length == 1)) { obj.sendToDeviceEx(docs[0], payload, options, func); } else { func(0, 'error'); } })
} else {
obj.sendToDeviceEx(node, payload, options, func);
}
}
// Send an outbound push notification
obj.sendToDeviceEx = function (node, payload, options, func) {
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parent.debug('email', 'Firebase-sendToDevice');
if ((node == null) || (typeof node.pmt != 'string')) return;
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obj.log('sendToDevice, node:' + node._id + ', payload: ' + JSON.stringify(payload) + ', options: ' + JSON.stringify(options));
// Fill in our lookup table
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if (node._id != null) { tokenToNodeMap[node.pmt] = { nid: node._id, mid: node.meshid, did: node.domain } }
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// Built the on-screen notification
var notification = null;
if (payload.notification) {
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var notification = new Notification('ic_message')
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.title(payload.notification.title)
.body(payload.notification.body)
.build();
}
// Build the message
var message = new Message('msg_' + (++obj.messageId));
if (options.priority) { message.priority(options.priority); }
if (payload.data) { for (var i in payload.data) { message.addData(i, payload.data[i]); } }
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if ((payload.data == null) || (payload.data.shash == null)) { message.addData('shash', parent.webserver.agentCertificateHashBase64); } // Add the server agent hash, new Android agents will reject notifications that don't have this.
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if (notification) { message.notification(notification) }
message.build();
// Send the message
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function callback(result) {
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if (result.getError() == null) { obj.stats.sent++; obj.log('Success'); } else { obj.stats.sendError++; obj.log('Fail'); }
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callback.func(result.getMessageId(), result.getError(), result.getErrorDescription())
}
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callback.func = func;
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parent.debug('email', 'Firebase-sending');
xcs.sendNoRetry(message, node.pmt, callback);
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}
// Setup a two way relay
obj.setupRelay = function (ws) {
// Select and set a relay identifier
ws.relayId = getRandomPassword();
while (obj.relays[ws.relayId] != null) { ws.relayId = getRandomPassword(); }
obj.relays[ws.relayId] = ws;
// On message, parse it
ws.on('message', function (msg) {
parent.debug('email', 'FBWS-Data(' + this.relayId + '): ' + msg);
if (typeof msg == 'string') {
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obj.log('Relay: ' + msg);
// Parse the incoming push request
var data = null;
try { data = JSON.parse(msg) } catch (ex) { return; }
if (typeof data != 'object') return;
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if (parent.common.validateObjectForMongo(data, 4096) == false) return; // Perform sanity checking on this object.
if (typeof data.pmt != 'string') return;
if (typeof data.payload != 'object') return;
if (typeof data.payload.notification == 'object') {
if (typeof data.payload.notification.title != 'string') return;
if (typeof data.payload.notification.body != 'string') return;
}
if (typeof data.options != 'object') return;
if ((data.options.priority != 'Normal') && (data.options.priority != 'High')) return;
if ((typeof data.options.timeToLive != 'number') || (data.options.timeToLive < 1)) return;
if (typeof data.payload.data != 'object') { data.payload.data = {}; }
data.payload.data.r = ws.relayId; // Set the relay id.
// Send the push notification
obj.sendToDevice({ pmt: data.pmt }, data.payload, data.options, function (id, err, errdesc) {
if (err == null) {
try { wsrelay.send(JSON.stringify({ sent: true })); } catch (ex) { }
} else {
try { wsrelay.send(JSON.stringify({ sent: false })); } catch (ex) { }
}
});
}
});
// If error, close the relay
ws.on('error', function (err) {
parent.debug('email', 'FBWS-Error(' + this.relayId + '): ' + err);
delete obj.relays[this.relayId];
});
// Close the relay
ws.on('close', function () {
parent.debug('email', 'FBWS-Close(' + this.relayId + ')');
delete obj.relays[this.relayId];
});
}
function getRandomPassword() { return Buffer.from(parent.crypto.randomBytes(9), 'binary').toString('base64').split('/').join('@'); }
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return obj;
};
// Construct the Firebase object
module.exports.CreateFirebaseRelay = function (parent, url, key) {
var obj = {};
obj.messageId = 0;
obj.stats = {
mode: "Relay",
sent: 0,
sendError: 0,
received: 0,
receivedNoRoute: 0,
receivedBadArgs: 0
}
const WebSocket = require('ws');
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const https = require('https');
const querystring = require('querystring');
const relayUrl = require('url').parse(url);
parent.debug('email', 'CreateFirebaseRelay-Setup');
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// Setup logging
if (parent.config.firebaserelay && (parent.config.firebaserelay.log === true)) {
obj.logpath = parent.path.join(parent.datapath, 'firebaserelay.txt');
obj.log = function (msg) { try { parent.fs.appendFileSync(obj.logpath, new Date().toLocaleString() + ': ' + msg + '\r\n'); } catch (ex) { console.log('ERROR: Unable to write to firebaserelay.txt.'); } }
} else {
obj.log = function () { }
}
obj.log('Starting relay to: ' + relayUrl.href);
if (relayUrl.protocol == 'wss:') {
// Setup two-way push notification channel
obj.wsopen = false;
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obj.tokenToNodeMap = {}; // Token --> { nid: nodeid, mid: meshid }
obj.backoffTimer = 0;
obj.connectWebSocket = function () {
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if (obj.reconnectTimer != null) { try { clearTimeout(obj.reconnectTimer); } catch (ex) { } delete obj.reconnectTimer; }
if (obj.wsclient != null) return;
obj.wsclient = new WebSocket(relayUrl.href + (key ? ('?key=' + key) : ''), { rejectUnauthorized: false })
obj.wsclient.on('open', function () {
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obj.lastConnect = Date.now();
parent.debug('email', 'FBWS-Connected');
obj.wsopen = true;
});
obj.wsclient.on('message', function (msg) {
parent.debug('email', 'FBWS-Data(' + msg.length + '): ' + msg);
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obj.log('Received(' + msg.length + '): ' + msg);
var data = null;
try { data = JSON.parse(msg) } catch (ex) { }
if (typeof data != 'object') return;
if (typeof data.from != 'string') return;
if (typeof data.data != 'object') return;
if (typeof data.category != 'string') return;
processMessage(data.messageId, data.from, data.data, data.category);
});
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obj.wsclient.on('error', function (err) { obj.log('Error: ' + err); });
obj.wsclient.on('close', function (a, b, c) {
parent.debug('email', 'FBWS-Disconnected');
obj.wsclient = null;
obj.wsopen = false;
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// Compute the backoff timer
if (obj.reconnectTimer == null) {
if ((obj.lastConnect != null) && ((Date.now() - obj.lastConnect) > 10000)) { obj.backoffTimer = 0; }
obj.backoffTimer += 1000;
obj.backoffTimer = obj.backoffTimer * 2;
if (obj.backoffTimer > 1200000) { obj.backoffTimer = 600000; } // Maximum 10 minutes backoff.
obj.reconnectTimer = setTimeout(obj.connectWebSocket, obj.backoffTimer);
}
});
}
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function processMessage(messageId, from, data, category) {
// Lookup node information from the cache
var ninfo = obj.tokenToNodeMap[from];
if (ninfo == null) { obj.stats.receivedNoRoute++; return; }
if ((data != null) && (data.con != null) && (data.s != null)) { // Console command
obj.stats.received++;
parent.webserver.routeAgentCommand({ action: 'msg', type: 'console', value: data.con, sessionid: data.s }, ninfo.did, ninfo.nid, ninfo.mid);
} else {
obj.stats.receivedBadArgs++;
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}
}
obj.sendToDevice = function (node, payload, options, func) {
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if (typeof node == 'string') {
parent.db.Get(node, function (err, docs) { if ((err == null) && (docs != null) && (docs.length == 1)) { obj.sendToDeviceEx(docs[0], payload, options, func); } else { func(0, 'error'); } })
} else {
obj.sendToDeviceEx(node, payload, options, func);
}
}
obj.sendToDeviceEx = function (node, payload, options, func) {
parent.debug('email', 'Firebase-sendToDevice-webSocket');
if ((node == null) || (typeof node.pmt != 'string')) { func(0, 'error'); return; }
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obj.log('sendToDevice, node:' + node._id + ', payload: ' + JSON.stringify(payload) + ', options: ' + JSON.stringify(options));
// Fill in our lookup table
if (node._id != null) { obj.tokenToNodeMap[node.pmt] = { nid: node._id, mid: node.meshid, did: node.domain } }
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// Fill in the server agent cert hash
if (payload.data == null) { payload.data = {}; }
if (payload.data.shash == null) { payload.data.shash = parent.webserver.agentCertificateHashBase64; } // Add the server agent hash, new Android agents will reject notifications that don't have this.
// If the web socket is open, send now
if (obj.wsopen == true) {
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try { obj.wsclient.send(JSON.stringify({ pmt: node.pmt, payload: payload, options: options })); } catch (ex) { func(0, 'error'); obj.stats.sendError++; return; }
obj.stats.sent++;
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obj.log('Sent');
func(1);
} else {
// TODO: Buffer the push messages until TTL.
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obj.stats.sendError++;
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obj.log('Error');
func(0, 'error');
}
}
obj.connectWebSocket();
} else if (relayUrl.protocol == 'https:') {
// Send an outbound push notification using an HTTPS POST
obj.pushOnly = true;
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obj.sendToDevice = function (node, payload, options, func) {
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if (typeof node == 'string') {
parent.db.Get(node, function (err, docs) { if ((err == null) && (docs != null) && (docs.length == 1)) { obj.sendToDeviceEx(docs[0], payload, options, func); } else { func(0, 'error'); } })
} else {
obj.sendToDeviceEx(node, payload, options, func);
}
}
obj.sendToDeviceEx = function (node, payload, options, func) {
parent.debug('email', 'Firebase-sendToDevice-httpPost');
if ((node == null) || (typeof node.pmt != 'string')) return;
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// Fill in the server agent cert hash
if (payload.data == null) { payload.data = {}; }
if (payload.data.shash == null) { payload.data.shash = parent.webserver.agentCertificateHashBase64; } // Add the server agent hash, new Android agents will reject notifications that don't have this.
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obj.log('sendToDevice, node:' + node._id + ', payload: ' + JSON.stringify(payload) + ', options: ' + JSON.stringify(options));
const querydata = querystring.stringify({ 'msg': JSON.stringify({ pmt: node.pmt, payload: payload, options: options }) });
// Send the message to the relay
const httpOptions = {
hostname: relayUrl.hostname,
port: relayUrl.port ? relayUrl.port : 443,
path: relayUrl.path + (key ? ('?key=' + key) : ''),
method: 'POST',
//rejectUnauthorized: false, // DEBUG
headers: {
'Content-Type': 'application/x-www-form-urlencoded',
'Content-Length': querydata.length
}
}
const req = https.request(httpOptions, function (res) {
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obj.log('Response: ' + res.statusCode);
if (res.statusCode == 200) { obj.stats.sent++; } else { obj.stats.sendError++; }
if (func != null) { func(++obj.messageId, (res.statusCode == 200) ? null : 'error'); }
});
parent.debug('email', 'Firebase-sending');
req.on('error', function (error) { obj.stats.sent++; func(++obj.messageId, 'error'); });
req.write(querydata);
req.end();
}
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}
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return obj;
};