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MeshCentral/amtscanner.js

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JavaScript
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/**
* @description Meshcentral Intel AMT Local Scanner
* @author Ylian Saint-Hilaire & Joko Sastriawan
* @version v0.0.1
*/
// Construct a Intel AMT Scanner object
module.exports.CreateAmtScanner = function (parent) {
var obj = {};
obj.active = false;
obj.parent = parent;
obj.dns = require('dns');
obj.dgram = require('dgram');
obj.common = require('./common.js');
obj.servers = {};
obj.rserver = {};
obj.rpacket = null;
obj.tagToId = {}; // Tag --> { lastpong: time, id: NodeId }
obj.scanTable = {}; // NodeId --> ScanInfo : { lastping: time, lastpong: time, nodeinfo:{node} }
obj.scanTableTags = {}; // Tag --> ScanInfo
obj.pendingSends = []; // We was to stagger the sends using a 10ms timer
obj.pendingSendTimer = null;
obj.mainTimer = null;
obj.nextTag = 0;
var PeriodicScanTime = 30000; // Interval between scan sweeps
var PeriodicScanTimeout = 65000; // After this time, timeout the device.
// Build a RMCP packet with a given tag field
obj.buildRmcpPing = function (tag) {
var packet = new Buffer(obj.common.hex2rstr('06000006000011BE80000000'), 'ascii');
packet[9] = tag;
return packet;
}
// Start scanning for local network Intel AMT computers
obj.start = function () {
obj.active = true;
obj.performScan();
obj.mainTimer = setInterval(obj.performScan, PeriodicScanTime);
return obj;
}
// Stop scanning for local network Intel AMT computers
obj.stop = function () {
obj.active = false;
for (var i in obj.servers) { obj.servers[i].close(); } // Stop all servers
obj.servers = {};
if (obj.mainTimer != null) { clearInterval(obj.mainTimer); obj.mainTimer = null; }
}
// Scan for Intel AMT computers using network multicast
obj.performRangeScan = function (userid, rangestr) {
if (obj.rpacket == null) { obj.rpacket = obj.buildRmcpPing(0); }
var range = obj.parseIpv4Range(rangestr);
//console.log(obj.IPv4NumToStr(range.min), obj.IPv4NumToStr(range.max));
if (range == null || (range.min > range.max)) return false;
var rangeinfo = { id: userid, range: rangestr, min: range.min, max: range.max, results: {} };
obj.rserver[userid] = rangeinfo;
rangeinfo.server = obj.dgram.createSocket("udp4");
rangeinfo.server.bind(0);
rangeinfo.server.on('error', (err) => { console.log(err); });
rangeinfo.server.on('message', (data, rinfo) => { obj.parseRmcpPacket(data, rinfo, 0, obj.reportMachineState, rangeinfo); });
rangeinfo.server.on('listening', () => {
for (var i = rangeinfo.min; i <= rangeinfo.max; i++) { rangeinfo.server.send(obj.rpacket, 623, obj.IPv4NumToStr(i)); }
});
rangeinfo.timer = setTimeout(function () {
obj.parent.DispatchEvent(['*', userid], obj, { action: 'scanamtdevice', range: rangeinfo.range, results: rangeinfo.results, nolog: 1 });
rangeinfo.server.close();
delete rangeinfo.server;
delete rangeinfo;
}, 3000);
return true;
}
// Parse range, used to parse "ip", "ip/mask" or "ip-ip" notation.
// Return the start and end value of the scan
obj.parseIpv4Range = function (range) {
if (range == undefined || range == null) return null;
var x = range.split('-');
if (x.length == 2) { return { min: obj.parseIpv4Addr(x[0]), max: obj.parseIpv4Addr(x[1]) }; }
x = range.split('/');
if (x.length == 2) {
var ip = obj.parseIpv4Addr(x[0]), masknum = parseInt(x[1]), mask = 0;
if (masknum <= 16 || masknum > 32) return null;
masknum = 32 - masknum;
for (var i = 0; i < masknum; i++) { mask = (mask << 1); mask++; }
return { min: ip & (0xFFFFFFFF - mask), max: (ip & (0xFFFFFFFF - mask)) + mask };
}
x = obj.parseIpv4Addr(range);
if (x == null) return null;
return { min: x, max: x };
}
// Parse IP address. Takes a
obj.parseIpv4Addr = function (addr) {
var x = addr.split('.');
if (x.length == 4) { return (parseInt(x[0]) << 24) + (parseInt(x[1]) << 16) + (parseInt(x[2]) << 8) + (parseInt(x[3]) << 0); }
return null;
}
// IP address number to string
obj.IPv4NumToStr = function (num) {
return ((num >> 24) & 0xFF) + '.' + ((num >> 16) & 0xFF) + '.' + ((num >> 8) & 0xFF) + '.' + (num & 0xFF);
}
// Look for all AMT computers that may be locally reachable and poll their presence
obj.performScan = function () {
if (obj.action == false) { return false; }
obj.parent.db.getLocalAmtNodes(function (err, docs) {
for (var i in obj.scanTable) { obj.scanTable[i].present = false; }
if (err == null && docs.length > 0) {
for (var i in docs) {
var doc = docs[i];
var host = doc.host.toLowerCase();
if ((host != '127.0.0.1') && (host != '::1') && (host != 'localhost')) { // Don't scan localhost
var scaninfo = obj.scanTable[doc._id];
if (scaninfo == undefined) {
var tag = obj.nextTag++;
obj.scanTableTags[tag] = obj.scanTable[doc._id] = scaninfo = { nodeinfo: doc, present: true, tag: tag, state: 0 };
} else {
scaninfo.present = true;
if (scaninfo.state == 1) {
var delta = Date.now() - scaninfo.lastpong;
if (delta > PeriodicScanTimeout) { // More than 10 seconds without a response, mark the node as unknown state
scaninfo.state = 0;
obj.parent.ClearConnectivityState(scaninfo.nodeinfo.meshid, scaninfo.nodeinfo._id, 4); // Clear connectivity state
}
}
}
// Start scanning this node
scaninfo.lastping = Date.now();
obj.checkAmtPresence(doc.host, scaninfo.tag);
}
}
}
for (var i in obj.scanTable) {
if (obj.scanTable[i].present == false) {
// Stop scanning this node
delete obj.scanTableTags[obj.scanTable[i].tag];
delete obj.scanTable[i];
}
}
});
return true;
}
// Check the presense of a specific Intel AMT computer
obj.checkAmtPresence = function (host, tag) {
var serverid = Math.floor(tag / 255);
var servertag = (tag % 255);
var packet = obj.buildRmcpPing(servertag);
var server = obj.servers[serverid];
if (server == undefined) {
// Start new server
server = obj.dgram.createSocket('udp4');
server.on('error', (err) => { });
server.on('message', (data, rinfo) => { obj.parseRmcpPacket(data, rinfo, serverid, obj.changeConnectState, null); });
server.on('listening', () => {
obj.pendingSends.push([ server, packet, host ]);
if (obj.pendingSendTimer == null) { obj.pendingSendTimer = setInterval(obj.sendPendingPacket, 10); }
});
server.bind(0);
obj.servers[serverid] = server;
} else {
// Use existing server
obj.pendingSends.push([ server, packet, host ]);
if (obj.pendingSendTimer == null) { obj.pendingSendTimer = setInterval(obj.sendPendingPacket, 10); }
}
}
// Send a pending RMCP packet
obj.sendPendingPacket = function() {
try {
var p = obj.pendingSends.shift();
if (p != undefined) {
p[0].send(p[1], 623, p[2]);
p[0].send(p[1], 623, p[2]);
} else {
clearInterval(obj.pendingSendTimer);
obj.pendingSendTimer = null;
}
} catch (e) { }
}
// Parse RMCP packet
obj.parseRmcpPacket = function (data, rinfo, serverid, func, user) {
if (data == null || data.length < 20) return;
if (((data[12] == 0) || (data[13] != 0) || (data[14] != 1) || (data[15] != 0x57)) && (data[21] & 32)) {
var servertag = data[9];
var tag = (serverid * 255) + servertag;
var minorVersion = data[18] & 0x0F;
var majorVersion = (data[18] >> 4) & 0x0F;
var provisioningState = data[19] & 0x03; // Pre = 0, In = 1, Post = 2
var openPort = (data[16] * 256) + data[17];
var dualPorts = ((data[19] & 0x04) != 0) ? true : false;
var openPorts = [openPort];
if (dualPorts == true) { openPorts = [16992, 16993]; }
if (provisioningState <= 2) { func(tag, minorVersion, majorVersion, provisioningState, openPort, dualPorts, rinfo, user); }
}
}
// Use the RMCP packet to change the computer state
obj.changeConnectState = function (tag, minorVersion, majorVersion, provisioningState, openPort, dualPorts, rinfo, user) {
//var provisioningStates = { 0: 'Pre', 1: 'in', 2: 'Post' };
//var provisioningStateStr = provisioningStates[provisioningState];
//console.log('Intel AMT ' + majorVersion + '.' + minorVersion + ', ' + provisioningStateStr + '-Provisioning at ' + rinfo.address + ', Open Ports: [' + openPorts.join(', ') + '], tag: ' + tag);
var scaninfo = obj.scanTableTags[tag];
if (scaninfo != undefined) {
scaninfo.lastpong = Date.now();
if (scaninfo.state == 0) {
scaninfo.state = 1;
scaninfo.nodeinfo.intelamt.tls = (((openPort == 16993) || (dualPorts == true)) ? 1 : 0);
scaninfo.nodeinfo.intelamt.ver = majorVersion + '.' + minorVersion;
scaninfo.nodeinfo.intelamt.state = provisioningState;
obj.parent.SetConnectivityState(scaninfo.nodeinfo.meshid, scaninfo.nodeinfo._id, scaninfo.lastpong, 4, 7); // Report power state as "present" (7).
obj.changeAmtState(scaninfo.nodeinfo._id, scaninfo.nodeinfo.intelamt.ver, provisioningState, scaninfo.nodeinfo.intelamt.tls);
}
}
}
// Use the RMCP packet to change the computer state
obj.reportMachineState = function (tag, minorVersion, majorVersion, provisioningState, openPort, dualPorts, rinfo, user) {
//var provisioningStates = { 0: 'Pre', 1: 'in', 2: 'Post' };
//var provisioningStateStr = provisioningStates[provisioningState];
//console.log(rinfo.address + ': Intel AMT ' + majorVersion + '.' + minorVersion + ', ' + provisioningStateStr + '-Provisioning, Open Ports: [' + openPorts.join(', ') + ']');
obj.dns.reverse(rinfo.address, function (err, hostname) {
if ((err != undefined) && (hostname != undefined)) {
user.results[rinfo.address] = { ver: majorVersion + '.' + minorVersion, tls: (((openPort == 16993) || (dualPorts == true)) ? 1 : 0), state: provisioningState, hostname: hostname[0] };
} else {
user.results[rinfo.address] = { ver: majorVersion + '.' + minorVersion, tls: (((openPort == 16993) || (dualPorts == true)) ? 1 : 0), state: provisioningState, hostname: rinfo.address };
}
});
}
// Change Intel AMT information in the database and event the changes
obj.changeAmtState = function (nodeid, version, provisioningState, tls) {
//console.log('changeAmtState', nodeid, version, provisioningState, tls);
obj.parent.db.Get(nodeid, function (err, nodes) {
if (nodes.length != 1) return;
var node = nodes[0];
// Get the mesh for this device
obj.parent.db.Get(node.meshid, function (err, meshes) {
if (meshes.length != 1) return;
var mesh = meshes[0];
// Ready the node change event
var changes = [], event = { etype: 'node', action: 'changenode', nodeid: node._id };
event.msg = +": ";
// Make the change & save
var change = false;
if (node.intelamt == undefined) { node.intelamt = {}; }
if (node.intelamt.tls != tls) { node.intelamt.tls = tls; change = true; changes.push(tls==1?'TLS':'NoTLS'); }
if (obj.compareAmtVersionStr(node.intelamt.ver, version)) { node.intelamt.ver = version; change = true; changes.push('Version ' + version); }
if (node.intelamt.state != provisioningState) { node.intelamt.state = provisioningState; change = true; changes.push('State'); }
if (change == true) {
// Make the change in the database
obj.parent.db.Set(node);
// Event the node change
event.msg = 'Intel&reg; AMT changed device ' + node.name + ' from mesh ' + mesh.name + ': ' + changes.join(', ');
var node2 = obj.parent.common.Clone(node);
if (node2.intelamt && node2.intelamt.pass) delete node2.intelamt.pass; // Remove the Intel AMT password before eventing this.
event.node = node2;
obj.parent.DispatchEvent(['*', node.meshid], obj, event);
}
});
});
}
// Return true if we should change the Intel AMT version number
obj.compareAmtVersionStr = function (oldVer, newVer) {
if (oldVer == newVer) return false; // Versions are same already, don't update.
if (newVer == undefined || newVer == null) return false; // New version is bad, don't update it.
if (oldVer == undefined || oldVer == null) return true; // Old version is no good anyway, update it.
var oldVerArr = oldVer.split('.');
var newVerArr = newVer.split('.');
if ((oldVerArr.length < 2) || (newVerArr.length < 2)) return false;
if ((oldVerArr[0] != newVerArr[0]) || (oldVerArr[1] != newVerArr[1])) return true;
if (newVerArr.length > oldVerArr.length) return true;
if ((newVerArr.length == 3) && (oldVerArr.length == 3) && (oldVerArr[2] != newVerArr[2])) return true;
return false;
}
return obj;
}
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