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MeshCentral/apfserver.js
Ylian Saint-Hilaire fdd56b2dc5 Updated file headers.
2020-01-02 18:30:12 -08:00

727 lines
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JavaScript
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/**
* @description MeshCentral Intel(R) AMT APF over websocket server
* @author Ylian Saint-Hilaire/Joko Sastriawan
* @copyright Intel Corporation 2018-2020
* @license Apache-2.0
* @version v0.0.1
*/
/*jslint node: true */
/*jshint node: true */
/*jshint strict:false */
/*jshint -W097 */
/*jshint esversion: 6 */
"use strict";
// Construct a Intel AMT APF server object
module.exports.CreateApfServer = function (parent, db, args) {
var obj = {};
obj.parent = parent;
obj.db = db;
obj.args = args;
obj.apfConnections = {};
const constants = (require('crypto').constants ? require('crypto').constants : require('constants')); // require('constants') is deprecated in Node 11.10, use require('crypto').constants instead.
const common = require("./common.js");
const net = require("net");
const MAX_IDLE = 90000; // 90 seconds max idle time, higher than the typical KEEP-ALIVE periode of 60 seconds
const APFProtocol = {
UNKNOWN: 0,
DISCONNECT: 1,
SERVICE_REQUEST: 5,
SERVICE_ACCEPT: 6,
USERAUTH_REQUEST: 50,
USERAUTH_FAILURE: 51,
USERAUTH_SUCCESS: 52,
GLOBAL_REQUEST: 80,
REQUEST_SUCCESS: 81,
REQUEST_FAILURE: 82,
CHANNEL_OPEN: 90,
CHANNEL_OPEN_CONFIRMATION: 91,
CHANNEL_OPEN_FAILURE: 92,
CHANNEL_WINDOW_ADJUST: 93,
CHANNEL_DATA: 94,
CHANNEL_CLOSE: 97,
PROTOCOLVERSION: 192,
KEEPALIVE_REQUEST: 208,
KEEPALIVE_REPLY: 209,
KEEPALIVE_OPTIONS_REQUEST: 210,
KEEPALIVE_OPTIONS_REPLY: 211
};
/*
const APFDisconnectCode = {
HOST_NOT_ALLOWED_TO_CONNECT: 1,
PROTOCOL_ERROR: 2,
KEY_EXCHANGE_FAILED: 3,
RESERVED: 4,
MAC_ERROR: 5,
COMPRESSION_ERROR: 6,
SERVICE_NOT_AVAILABLE: 7,
PROTOCOL_VERSION_NOT_SUPPORTED: 8,
HOST_KEY_NOT_VERIFIABLE: 9,
CONNECTION_LOST: 10,
BY_APPLICATION: 11,
TOO_MANY_CONNECTIONS: 12,
AUTH_CANCELLED_BY_USER: 13,
NO_MORE_AUTH_METHODS_AVAILABLE: 14,
INVALID_CREDENTIALS: 15,
CONNECTION_TIMED_OUT: 16,
BY_POLICY: 17,
TEMPORARILY_UNAVAILABLE: 18
};
const APFChannelOpenFailCodes = {
ADMINISTRATIVELY_PROHIBITED: 1,
CONNECT_FAILED: 2,
UNKNOWN_CHANNEL_TYPE: 3,
RESOURCE_SHORTAGE: 4,
};
*/
const APFChannelOpenFailureReasonCode = {
AdministrativelyProhibited: 1,
ConnectFailed: 2,
UnknownChannelType: 3,
ResourceShortage: 4,
};
// Stat counters
var connectionCount = 0;
var userAuthRequestCount = 0;
var incorrectPasswordCount = 0;
var meshNotFoundCount = 0;
var unknownNodeCount = 0;
var unknownMeshIdCount = 0;
var addedDeviceCount = 0;
var ciraTimeoutCount = 0;
var protocolVersionCount = 0;
var badUserNameLengthCount = 0;
var channelOpenCount = 0;
var channelOpenConfirmCount = 0;
var channelOpenFailCount = 0;
var channelCloseCount = 0;
var disconnectCommandCount = 0;
var socketClosedCount = 0;
var socketErrorCount = 0;
var maxDomainDevicesReached = 0;
// Return statistics about this APF server
obj.getStats = function () {
return {
apfConnections: Object.keys(obj.apfConnections).length,
connectionCount: connectionCount,
userAuthRequestCount: userAuthRequestCount,
incorrectPasswordCount: incorrectPasswordCount,
meshNotFoundCount: meshNotFoundCount,
unknownNodeCount: unknownNodeCount,
unknownMeshIdCount: unknownMeshIdCount,
addedDeviceCount: addedDeviceCount,
apfTimeoutCount: ciraTimeoutCount,
protocolVersionCount: protocolVersionCount,
badUserNameLengthCount: badUserNameLengthCount,
channelOpenCount: channelOpenCount,
channelOpenConfirmCount: channelOpenConfirmCount,
channelOpenFailCount: channelOpenFailCount,
channelCloseCount: channelCloseCount,
disconnectCommandCount: disconnectCommandCount,
socketClosedCount: socketClosedCount,
socketErrorCount: socketErrorCount,
maxDomainDevicesReached : maxDomainDevicesReached
};
}
obj.onConnection = function(socket) {
connectionCount++;
// treat APS over WS like tlsoffload APF
socket.tag = { first: true, clientCert: null, accumulator: "", activetunnels: 0, boundPorts: [], socket: socket, host: null, nextchannelid: 4, channels: {}, nextsourceport: 0 };
parent.debug('apf', "New APF connection");
parent.debug('apf',"WS Extensions:"+socket.extensions);
parent.debug('apf',"WS Binary type:"+socket.binaryType);
//socket._socket.on('data', function(chunk) { console.log(chunk.toString('hex'))});
// Setup the APF keep alive timer
// Websocket does not have timout
// socket.setTimeout(MAX_IDLE);
//socket.on("timeout", () => { ciraTimeoutCount++; parent.debug('apf', "APF timeout, disconnecting."); try { socket.terminate(); } catch (e) { } });
//use on message instead because of websocket
socket.on("message", function (data) {
// use the same debug flag like APF
if (obj.args.debug) { var buf = Buffer.from(data, "binary"); console.log("APF <-- (" + buf.length + "):" + buf.toString('hex')); } // Print out received bytes
socket.tag.accumulator += data.toString("binary"); // append as binary string
try {
// Parse all of the APF data we can
var l = 0;
do { l = ProcessCommand(socket); if (l > 0) { socket.tag.accumulator = socket.tag.accumulator.substring(l); } } while (l > 0);
if (l < 0) { socket.terminate(); }
} catch (e) {
console.log(e);
}
});
// Process one AFP command
function ProcessCommand(socket) {
var cmd = socket.tag.accumulator.charCodeAt(0);
var len = socket.tag.accumulator.length;
var data = socket.tag.accumulator;
if (len == 0) { return 0; }
switch (cmd) {
case APFProtocol.KEEPALIVE_REQUEST: {
if (len < 5) return 0;
parent.debug('apfcmd', 'KEEPALIVE_REQUEST');
SendKeepAliveReply(socket, common.ReadInt(data, 1));
return 5;
}
case APFProtocol.KEEPALIVE_REPLY: {
if (len < 5) return 0;
parent.debug('apfcmd', 'KEEPALIVE_REPLY');
return 5;
}
case APFProtocol.PROTOCOLVERSION: {
if (len < 93) return 0;
protocolVersionCount++;
socket.tag.MajorVersion = common.ReadInt(data, 1);
socket.tag.MinorVersion = common.ReadInt(data, 5);
socket.tag.SystemId = guidToStr(common.rstr2hex(data.substring(13, 29))).toLowerCase();
parent.debug('apfcmd', 'PROTOCOLVERSION', socket.tag.MajorVersion, socket.tag.MinorVersion, socket.tag.SystemId);
return 93;
}
case APFProtocol.USERAUTH_REQUEST: {
if (len < 13) return 0;
userAuthRequestCount++;
var usernameLen = common.ReadInt(data, 1);
var username = data.substring(5, 5 + usernameLen);
var serviceNameLen = common.ReadInt(data, 5 + usernameLen);
var serviceName = data.substring(9 + usernameLen, 9 + usernameLen + serviceNameLen);
var methodNameLen = common.ReadInt(data, 9 + usernameLen + serviceNameLen);
var methodName = data.substring(13 + usernameLen + serviceNameLen, 13 + usernameLen + serviceNameLen + methodNameLen);
var passwordLen = 0, password = null;
if (methodName == 'password') {
passwordLen = common.ReadInt(data, 14 + usernameLen + serviceNameLen + methodNameLen);
password = data.substring(18 + usernameLen + serviceNameLen + methodNameLen, 18 + usernameLen + serviceNameLen + methodNameLen + passwordLen);
}
//console.log('APF:USERAUTH_REQUEST user=' + username + ', service=' + serviceName + ', method=' + methodName + ', password=' + password);
parent.debug('apfcmd', 'USERAUTH_REQUEST user=' + username + ', service=' + serviceName + ', method=' + methodName + ', password=' + password);
// Check the APF password
if ((args.mpspass != null) && (password != args.mpspass)) { incorrectPasswordCount++; parent.debug('apf', 'Incorrect password', username, password); SendUserAuthFail(socket); return -1; }
// Check the APF username, which should be the start of the MeshID.
if (usernameLen != 16) { badUserNameLengthCount++; parent.debug('apf', 'Username length not 16', username, password); SendUserAuthFail(socket); return -1; }
var meshIdStart = '/' + username, mesh = null;
if (obj.parent.webserver.meshes) { for (var i in obj.parent.webserver.meshes) { if (obj.parent.webserver.meshes[i]._id.replace(/\@/g, 'X').replace(/\$/g, 'X').indexOf(meshIdStart) > 0) { mesh = obj.parent.webserver.meshes[i]; break; } } }
if (mesh == null) { meshNotFoundCount++; parent.debug('apf', 'Mesh not found', username, password); SendUserAuthFail(socket); return -1; }
// If this is a agent-less mesh, use the device guid 3 times as ID.
if (mesh.mtype == 1) {
// Intel AMT GUID (socket.tag.SystemId) will be used as NodeID
var systemid = socket.tag.SystemId.split('-').join('');
var nodeid = Buffer.from(systemid + systemid + systemid, 'hex').toString('base64').replace(/\+/g, '@').replace(/\//g, '$');
var domain = obj.parent.config.domains[mesh.domain];
socket.tag.domain = domain;
socket.tag.domainid = mesh.domain;
socket.tag.name = '';
socket.tag.nodeid = 'node/' + mesh.domain + '/' + nodeid; // Turn 16bit systemid guid into 48bit nodeid that is base64 encoded
socket.tag.meshid = mesh._id;
socket.tag.connectTime = Date.now();
obj.db.Get(socket.tag.nodeid, function (err, nodes) {
if ((nodes == null) || (nodes.length !== 1)) {
// Check if we already have too many devices for this domain
if (domain.limits && (typeof domain.limits.maxdevices == 'number')) {
db.isMaxType(domain.limits.maxdevices, 'node', mesh.domain, function (ismax, count) {
if (ismax == true) {
// Too many devices in this domain.
maxDomainDevicesReached++;
console.log('Too many devices on this domain to accept the APF connection. meshid: ' + socket.tag.meshid);
socket.terminate();
} else {
// We are under the limit, create the new device.
// Node is not in the database, add it. Credentials will be empty until added by the user.
var device = { type: 'node', mtype: 1, _id: socket.tag.nodeid, meshid: socket.tag.meshid, name: socket.tag.name, host: null, domain: mesh.domain, intelamt: { user: '', pass: '', tls: 0, state: 2 } };
obj.db.Set(device);
// Event the new node
addedDeviceCount++;
var change = 'APF added device ' + socket.tag.name + ' to group ' + mesh.name;
obj.parent.DispatchEvent(['*', socket.tag.meshid], obj, { etype: 'node', action: 'addnode', node: parent.webserver.CloneSafeNode(device), msg: change, domain: mesh.domain });
// Add the connection to the APF connection list
obj.apfConnections[socket.tag.nodeid] = socket;
// send connectivuty update type 8 for APF
obj.parent.SetConnectivityState(socket.tag.meshid, socket.tag.nodeid, socket.tag.connectTime, 8, 7); // TODO: Right now report power state as "present" (7) until we can poll.
SendUserAuthSuccess(socket); // Notify the auth success on the APF connection
}
});
return;
} else {
// Node is not in the database, add it. Credentials will be empty until added by the user.
var device = { type: 'node', mtype: 1, _id: socket.tag.nodeid, meshid: socket.tag.meshid, name: socket.tag.name, host: null, domain: mesh.domain, intelamt: { user: '', pass: '', tls: 0, state: 2 } };
obj.db.Set(device);
// Event the new node
addedDeviceCount++;
var change = 'APF added device ' + socket.tag.name + ' to group ' + mesh.name;
obj.parent.DispatchEvent(['*', socket.tag.meshid], obj, { etype: 'node', action: 'addnode', node: parent.webserver.CloneSafeNode(device), msg: change, domain: mesh.domain });
}
} else {
// Node is already present
var node = nodes[0];
if ((node.intelamt != null) && (node.intelamt.state == 2)) { socket.tag.host = node.intelamt.host; }
}
// Add the connection to the APF connection list
obj.apfConnections[socket.tag.nodeid] = socket;
obj.parent.SetConnectivityState(socket.tag.meshid, socket.tag.nodeid, socket.tag.connectTime, 8, 7); // TODO: Right now report power state as "present" (7) until we can poll.
SendUserAuthSuccess(socket); // Notify the auth success on the APF connection
});
} else if (mesh.mtype == 2) { // If this is a agent mesh, search the mesh for this device UUID
// Intel AMT GUID (socket.tag.SystemId) will be used to search the node
obj.db.getAmtUuidNode(socket.tag.SystemId, function (err, nodes) { // TODO: May need to optimize this request with indexes
if ((nodes == null) || (nodes.length !== 1)) {
// New APF connection for unknown node, disconnect.
unknownNodeCount++;
console.log('APF connection for unknown node. groupid: ' + mesh._id + ', uuid: ' + socket.tag.SystemId);
socket.terminate();
return;
}
// Node is present
var node = nodes[0];
if ((node.intelamt != null) && (node.intelamt.state == 2)) { socket.tag.host = node.intelamt.host; }
socket.tag.nodeid = node._id;
socket.tag.meshid = mesh._id;
socket.tag.connectTime = Date.now();
// Add the connection to the APF connection list
obj.apfConnections[socket.tag.nodeid] = socket;
obj.parent.SetConnectivityState(socket.tag.meshid, socket.tag.nodeid, socket.tag.connectTime, 8, 7); // TODO: Right now report power state as "present" (7) until we can poll.
SendUserAuthSuccess(socket); // Notify the auth success on the APF connection
});
} else { // Unknown mesh type
// New APF connection for unknown node, disconnect.
unknownMeshIdCount++;
console.log('APF connection to a unknown group type. groupid: ' + socket.tag.meshid);
socket.terminate();
return;
}
return 18 + usernameLen + serviceNameLen + methodNameLen + passwordLen;
}
case APFProtocol.SERVICE_REQUEST: {
if (len < 5) return 0;
var xserviceNameLen = common.ReadInt(data, 1);
if (len < 5 + xserviceNameLen) return 0;
var xserviceName = data.substring(5, 5 + xserviceNameLen);
parent.debug('apfcmd', 'SERVICE_REQUEST', xserviceName);
if (xserviceName == "pfwd@amt.intel.com") { SendServiceAccept(socket, "pfwd@amt.intel.com"); }
if (xserviceName == "auth@amt.intel.com") { SendServiceAccept(socket, "auth@amt.intel.com"); }
return 5 + xserviceNameLen;
}
case APFProtocol.GLOBAL_REQUEST: {
if (len < 14) return 0;
var requestLen = common.ReadInt(data, 1);
if (len < 14 + requestLen) return 0;
var request = data.substring(5, 5 + requestLen);
//var wantResponse = data.charCodeAt(5 + requestLen);
if (request == "tcpip-forward") {
var addrLen = common.ReadInt(data, 6 + requestLen);
if (len < 14 + requestLen + addrLen) return 0;
var addr = data.substring(10 + requestLen, 10 + requestLen + addrLen);
var port = common.ReadInt(data, 10 + requestLen + addrLen);
parent.debug('apfcmd', 'GLOBAL_REQUEST', request, addr + ':' + port);
ChangeHostname(socket, addr, socket.tag.SystemId);
if (socket.tag.boundPorts.indexOf(port) == -1) { socket.tag.boundPorts.push(port); }
SendTcpForwardSuccessReply(socket, port);
return 14 + requestLen + addrLen;
}
if (request == "cancel-tcpip-forward") {
var addrLen = common.ReadInt(data, 6 + requestLen);
if (len < 14 + requestLen + addrLen) return 0;
var addr = data.substring(10 + requestLen, 10 + requestLen + addrLen);
var port = common.ReadInt(data, 10 + requestLen + addrLen);
parent.debug('apfcmd', 'GLOBAL_REQUEST', request, addr + ':' + port);
var portindex = socket.tag.boundPorts.indexOf(port);
if (portindex >= 0) { socket.tag.boundPorts.splice(portindex, 1); }
SendTcpForwardCancelReply(socket);
return 14 + requestLen + addrLen;
}
if (request == "udp-send-to@amt.intel.com") {
var addrLen = common.ReadInt(data, 6 + requestLen);
if (len < 26 + requestLen + addrLen) return 0;
var addr = data.substring(10 + requestLen, 10 + requestLen + addrLen);
var port = common.ReadInt(data, 10 + requestLen + addrLen);
var oaddrLen = common.ReadInt(data, 14 + requestLen + addrLen);
if (len < 26 + requestLen + addrLen + oaddrLen) return 0;
var oaddr = data.substring(18 + requestLen, 18 + requestLen + addrLen);
var oport = common.ReadInt(data, 18 + requestLen + addrLen + oaddrLen);
var datalen = common.ReadInt(data, 22 + requestLen + addrLen + oaddrLen);
if (len < 26 + requestLen + addrLen + oaddrLen + datalen) return 0;
parent.debug('apfcmd', 'GLOBAL_REQUEST', request, addr + ':' + port, oaddr + ':' + oport, datalen);
// TODO
return 26 + requestLen + addrLen + oaddrLen + datalen;
}
return 6 + requestLen;
}
case APFProtocol.CHANNEL_OPEN: {
if (len < 33) return 0;
var ChannelTypeLength = common.ReadInt(data, 1);
if (len < (33 + ChannelTypeLength)) return 0;
// Decode channel identifiers and window size
var ChannelType = data.substring(5, 5 + ChannelTypeLength);
var SenderChannel = common.ReadInt(data, 5 + ChannelTypeLength);
var WindowSize = common.ReadInt(data, 9 + ChannelTypeLength);
// Decode the target
var TargetLen = common.ReadInt(data, 17 + ChannelTypeLength);
if (len < (33 + ChannelTypeLength + TargetLen)) return 0;
var Target = data.substring(21 + ChannelTypeLength, 21 + ChannelTypeLength + TargetLen);
var TargetPort = common.ReadInt(data, 21 + ChannelTypeLength + TargetLen);
// Decode the source
var SourceLen = common.ReadInt(data, 25 + ChannelTypeLength + TargetLen);
if (len < (33 + ChannelTypeLength + TargetLen + SourceLen)) return 0;
var Source = data.substring(29 + ChannelTypeLength + TargetLen, 29 + ChannelTypeLength + TargetLen + SourceLen);
var SourcePort = common.ReadInt(data, 29 + ChannelTypeLength + TargetLen + SourceLen);
channelOpenCount++;
parent.debug('apfcmd', 'CHANNEL_OPEN', ChannelType, SenderChannel, WindowSize, Target + ':' + TargetPort, Source + ':' + SourcePort);
// Check if we understand this channel type
//if (ChannelType.toLowerCase() == "direct-tcpip")
{
// We don't understand this channel type, send an error back
SendChannelOpenFailure(socket, SenderChannel, APFChannelOpenFailureReasonCode.UnknownChannelType);
return 33 + ChannelTypeLength + TargetLen + SourceLen;
}
/*
// This is a correct connection. Lets get it setup
var MeshAmtEventEndpoint = { ServerChannel: GetNextBindId(), AmtChannel: SenderChannel, MaxWindowSize: 2048, CurrentWindowSize:2048, SendWindow: WindowSize, InfoHeader: "Target: " + Target + ":" + TargetPort + ", Source: " + Source + ":" + SourcePort};
// TODO: Connect this socket for a WSMAN event
SendChannelOpenConfirmation(socket, SenderChannel, MeshAmtEventEndpoint.ServerChannel, MeshAmtEventEndpoint.MaxWindowSize);
*/
return 33 + ChannelTypeLength + TargetLen + SourceLen;
}
case APFProtocol.CHANNEL_OPEN_CONFIRMATION:
{
if (len < 17) return 0;
var RecipientChannel = common.ReadInt(data, 1);
var SenderChannel = common.ReadInt(data, 5);
var WindowSize = common.ReadInt(data, 9);
socket.tag.activetunnels++;
var cirachannel = socket.tag.channels[RecipientChannel];
if (cirachannel == null) { /*console.log("APF Error in CHANNEL_OPEN_CONFIRMATION: Unable to find channelid " + RecipientChannel);*/ return 17; }
cirachannel.amtchannelid = SenderChannel;
cirachannel.sendcredits = cirachannel.amtCiraWindow = WindowSize;
channelOpenConfirmCount++;
parent.debug('apfcmd', 'CHANNEL_OPEN_CONFIRMATION', RecipientChannel, SenderChannel, WindowSize);
if (cirachannel.closing == 1) {
// Close this channel
SendChannelClose(cirachannel.socket, cirachannel.amtchannelid);
} else {
cirachannel.state = 2;
// Send any pending data
if (cirachannel.sendBuffer != null) {
if (cirachannel.sendBuffer.length <= cirachannel.sendcredits) {
// Send the entire pending buffer
SendChannelData(cirachannel.socket, cirachannel.amtchannelid, cirachannel.sendBuffer);
cirachannel.sendcredits -= cirachannel.sendBuffer.length;
delete cirachannel.sendBuffer;
if (cirachannel.onSendOk) { cirachannel.onSendOk(cirachannel); }
} else {
// Send a part of the pending buffer
SendChannelData(cirachannel.socket, cirachannel.amtchannelid, cirachannel.sendBuffer.substring(0, cirachannel.sendcredits));
cirachannel.sendBuffer = cirachannel.sendBuffer.substring(cirachannel.sendcredits);
cirachannel.sendcredits = 0;
}
}
// Indicate the channel is open
if (cirachannel.onStateChange) { cirachannel.onStateChange(cirachannel, cirachannel.state); }
}
return 17;
}
case APFProtocol.CHANNEL_OPEN_FAILURE:
{
if (len < 17) return 0;
var RecipientChannel = common.ReadInt(data, 1);
var ReasonCode = common.ReadInt(data, 5);
channelOpenFailCount++;
parent.debug('apfcmd', 'CHANNEL_OPEN_FAILURE', RecipientChannel, ReasonCode);
var cirachannel = socket.tag.channels[RecipientChannel];
if (cirachannel == null) { console.log("APF Error in CHANNEL_OPEN_FAILURE: Unable to find channelid " + RecipientChannel); return 17; }
if (cirachannel.state > 0) {
cirachannel.state = 0;
if (cirachannel.onStateChange) { cirachannel.onStateChange(cirachannel, cirachannel.state); }
delete socket.tag.channels[RecipientChannel];
}
return 17;
}
case APFProtocol.CHANNEL_CLOSE:
{
if (len < 5) return 0;
var RecipientChannel = common.ReadInt(data, 1);
channelCloseCount++;
parent.debug('apfcmd', 'CHANNEL_CLOSE', RecipientChannel);
var cirachannel = socket.tag.channels[RecipientChannel];
if (cirachannel == null) { console.log("APF Error in CHANNEL_CLOSE: Unable to find channelid " + RecipientChannel); return 5; }
socket.tag.activetunnels--;
if (cirachannel.state > 0) {
cirachannel.state = 0;
if (cirachannel.onStateChange) { cirachannel.onStateChange(cirachannel, cirachannel.state); }
delete socket.tag.channels[RecipientChannel];
}
return 5;
}
case APFProtocol.CHANNEL_WINDOW_ADJUST:
{
if (len < 9) return 0;
var RecipientChannel = common.ReadInt(data, 1);
var ByteToAdd = common.ReadInt(data, 5);
var cirachannel = socket.tag.channels[RecipientChannel];
if (cirachannel == null) { console.log("APF Error in CHANNEL_WINDOW_ADJUST: Unable to find channelid " + RecipientChannel); return 9; }
cirachannel.sendcredits += ByteToAdd;
parent.debug('apfcmd', 'CHANNEL_WINDOW_ADJUST', RecipientChannel, ByteToAdd, cirachannel.sendcredits);
if (cirachannel.state == 2 && cirachannel.sendBuffer != null) {
// Compute how much data we can send
if (cirachannel.sendBuffer.length <= cirachannel.sendcredits) {
// Send the entire pending buffer
SendChannelData(cirachannel.socket, cirachannel.amtchannelid, cirachannel.sendBuffer);
cirachannel.sendcredits -= cirachannel.sendBuffer.length;
delete cirachannel.sendBuffer;
if (cirachannel.onSendOk) { cirachannel.onSendOk(cirachannel); }
} else {
// Send a part of the pending buffer
SendChannelData(cirachannel.socket, cirachannel.amtchannelid, cirachannel.sendBuffer.substring(0, cirachannel.sendcredits));
cirachannel.sendBuffer = cirachannel.sendBuffer.substring(cirachannel.sendcredits);
cirachannel.sendcredits = 0;
}
}
return 9;
}
case APFProtocol.CHANNEL_DATA:
{
if (len < 9) return 0;
var RecipientChannel = common.ReadInt(data, 1);
var LengthOfData = common.ReadInt(data, 5);
if (len < (9 + LengthOfData)) return 0;
parent.debug('apfcmddata', 'CHANNEL_DATA', RecipientChannel, LengthOfData);
var cirachannel = socket.tag.channels[RecipientChannel];
if (cirachannel == null) { console.log("APF Error in CHANNEL_DATA: Unable to find channelid " + RecipientChannel); return 9 + LengthOfData; }
cirachannel.amtpendingcredits += LengthOfData;
if (cirachannel.onData) cirachannel.onData(cirachannel, data.substring(9, 9 + LengthOfData));
if (cirachannel.amtpendingcredits > (cirachannel.ciraWindow / 2)) {
SendChannelWindowAdjust(cirachannel.socket, cirachannel.amtchannelid, cirachannel.amtpendingcredits); // Adjust the buffer window
cirachannel.amtpendingcredits = 0;
}
return 9 + LengthOfData;
}
case APFProtocol.DISCONNECT:
{
if (len < 7) return 0;
var ReasonCode = common.ReadInt(data, 1);
disconnectCommandCount++;
parent.debug('apfcmd', 'DISCONNECT', ReasonCode);
try { delete obj.apfConnections[socket.tag.nodeid]; } catch (e) { }
obj.parent.ClearConnectivityState(socket.tag.meshid, socket.tag.nodeid, 8);
return 7;
}
default:
{
parent.debug('apfcmd', 'Unknown APF command: ' + cmd);
return -1;
}
}
}
socket.addListener("close", function () {
socketClosedCount++;
parent.debug('apf', 'APF connection closed');
try { delete obj.apfConnections[socket.tag.nodeid]; } catch (e) { }
obj.parent.ClearConnectivityState(socket.tag.meshid, socket.tag.nodeid, 8);
});
socket.addListener("error", function (e) {
socketErrorCount++;
console.log("APF Error: " + e);
});
}
// Disconnect APF tunnel
obj.close = function (socket) {
try { socket.terminate(); } catch (e) { }
try { delete obj.apfConnections[socket.tag.nodeid]; } catch (e) { }
obj.parent.ClearConnectivityState(socket.tag.meshid, socket.tag.nodeid, 8);
};
function SendServiceAccept(socket, service) {
Write(socket, String.fromCharCode(APFProtocol.SERVICE_ACCEPT) + common.IntToStr(service.length) + service);
}
function SendTcpForwardSuccessReply(socket, port) {
Write(socket, String.fromCharCode(APFProtocol.REQUEST_SUCCESS) + common.IntToStr(port));
}
function SendTcpForwardCancelReply(socket) {
Write(socket, String.fromCharCode(APFProtocol.REQUEST_SUCCESS));
}
/*
function SendKeepAliveRequest(socket, cookie) {
Write(socket, String.fromCharCode(APFProtocol.KEEPALIVE_REQUEST) + common.IntToStr(cookie));
}
*/
function SendKeepAliveReply(socket, cookie) {
Write(socket, String.fromCharCode(APFProtocol.KEEPALIVE_REPLY) + common.IntToStr(cookie));
}
function SendChannelOpenFailure(socket, senderChannel, reasonCode) {
Write(socket, String.fromCharCode(APFProtocol.CHANNEL_OPEN_FAILURE) + common.IntToStr(senderChannel) + common.IntToStr(reasonCode) + common.IntToStr(0) + common.IntToStr(0));
}
/*
function SendChannelOpenConfirmation(socket, recipientChannelId, senderChannelId, initialWindowSize) {
Write(socket, String.fromCharCode(APFProtocol.CHANNEL_OPEN_CONFIRMATION) + common.IntToStr(recipientChannelId) + common.IntToStr(senderChannelId) + common.IntToStr(initialWindowSize) + common.IntToStr(-1));
}
*/
function SendChannelOpen(socket, direct, channelid, windowsize, target, targetport, source, sourceport) {
var connectionType = ((direct == true) ? "direct-tcpip" : "forwarded-tcpip");
if ((target == null) || (target == null)) target = ''; // TODO: Reports of target being undefined that causes target.length to fail. This is a hack.
Write(socket, String.fromCharCode(APFProtocol.CHANNEL_OPEN) + common.IntToStr(connectionType.length) + connectionType + common.IntToStr(channelid) + common.IntToStr(windowsize) + common.IntToStr(-1) + common.IntToStr(target.length) + target + common.IntToStr(targetport) + common.IntToStr(source.length) + source + common.IntToStr(sourceport));
}
function SendChannelClose(socket, channelid) {
Write(socket, String.fromCharCode(APFProtocol.CHANNEL_CLOSE) + common.IntToStr(channelid));
}
function SendChannelData(socket, channelid, data) {
Write(socket, String.fromCharCode(APFProtocol.CHANNEL_DATA) + common.IntToStr(channelid) + common.IntToStr(data.length) + data);
}
function SendChannelWindowAdjust(socket, channelid, bytestoadd) {
parent.debug('apfcmd', 'SendChannelWindowAdjust', channelid, bytestoadd);
Write(socket, String.fromCharCode(APFProtocol.CHANNEL_WINDOW_ADJUST) + common.IntToStr(channelid) + common.IntToStr(bytestoadd));
}
/*
function SendDisconnect(socket, reasonCode) {
Write(socket, String.fromCharCode(APFProtocol.DISCONNECT) + common.IntToStr(reasonCode) + common.ShortToStr(0));
}
*/
function SendUserAuthFail(socket) {
Write(socket, String.fromCharCode(APFProtocol.USERAUTH_FAILURE) + common.IntToStr(8) + 'password' + common.ShortToStr(0));
}
function SendUserAuthSuccess(socket) {
Write(socket, String.fromCharCode(APFProtocol.USERAUTH_SUCCESS));
}
function Write(socket, data) {
if (obj.args.debug) {
// Print out sent bytes
var buf = Buffer.from(data, "binary");
console.log('APF --> (' + buf.length + '):' + buf.toString('hex'));
socket.send(buf);
} else {
socket.send(Buffer.from(data, "binary"));
}
}
obj.SetupCiraChannel = function (socket, targetport) {
var sourceport = (socket.tag.nextsourceport++ % 30000) + 1024;
var cirachannel = { targetport: targetport, channelid: socket.tag.nextchannelid++, socket: socket, state: 1, sendcredits: 0, amtpendingcredits: 0, amtCiraWindow: 0, ciraWindow: 32768 };
SendChannelOpen(socket, false, cirachannel.channelid, cirachannel.ciraWindow, socket.tag.host, targetport, "1.2.3.4", sourceport);
// This function writes data to this APF channel
cirachannel.write = function (data) {
if (cirachannel.state == 0) return false;
if (cirachannel.state == 1 || cirachannel.sendcredits == 0 || cirachannel.sendBuffer != null) {
// Channel is connected, but we are out of credits. Add the data to the outbound buffer.
if (cirachannel.sendBuffer == null) { cirachannel.sendBuffer = data; } else { cirachannel.sendBuffer += data; }
return true;
}
// Compute how much data we can send
if (data.length <= cirachannel.sendcredits) {
// Send the entire message
SendChannelData(cirachannel.socket, cirachannel.amtchannelid, data);
cirachannel.sendcredits -= data.length;
return true;
}
// Send a part of the message
cirachannel.sendBuffer = data.substring(cirachannel.sendcredits);
SendChannelData(cirachannel.socket, cirachannel.amtchannelid, data.substring(0, cirachannel.sendcredits));
cirachannel.sendcredits = 0;
return false;
};
// This function closes this APF channel
cirachannel.close = function () {
if (cirachannel.state == 0 || cirachannel.closing == 1) return;
if (cirachannel.state == 1) { cirachannel.closing = 1; cirachannel.state = 0; if (cirachannel.onStateChange) { cirachannel.onStateChange(cirachannel, cirachannel.state); } return; }
cirachannel.state = 0;
cirachannel.closing = 1;
SendChannelClose(cirachannel.socket, cirachannel.amtchannelid);
if (cirachannel.onStateChange) { cirachannel.onStateChange(cirachannel, cirachannel.state); }
};
socket.tag.channels[cirachannel.channelid] = cirachannel;
return cirachannel;
};
function ChangeHostname(socket, host, systemid) {
if (socket.tag.host === host) return; // Nothing to change
socket.tag.host = host;
// Change the device
obj.db.Get(socket.tag.nodeid, function (err, nodes) {
if ((nodes == null) || (nodes.length !== 1)) return;
var node = nodes[0];
// See if any changes need to be made
if ((node.intelamt != null) && (node.intelamt.host == host) && (node.name != null) && (node.name != '') && (node.intelamt.state == 2)) return;
// Get the mesh for this device
obj.db.Get(node.meshid, function (err, meshes) {
if ((meshes == null) || (meshes.length !== 1)) return;
var mesh = meshes[0];
// Ready the node change event
var changes = ['host'], event = { etype: 'node', action: 'changenode', nodeid: node._id };
event.msg = +": ";
// Make the change & save
if (node.intelamt == null) node.intelamt = {};
node.intelamt.host = host;
node.intelamt.state = 2; // TODO: this is not real AMT state
if (((node.name == null) || (node.name == '')) && (host != null) && (host != '')) { node.name = host.split('.')[0]; } // If this system has no name, set it to the start of the domain name.
if (((node.name == null) || (node.name == '')) && (systemid != null)) { node.name = systemid; } // If this system still has no name, set it to the system GUID.
obj.db.Set(node);
// Event the node change
event.msg = 'APF changed device ' + node.name + ' from group ' + mesh.name + ': ' + changes.join(', ');
event.node = parent.webserver.CloneSafeNode(node);
if (obj.db.changeStream) { event.noact = 1; } // If DB change stream is active, don't use this event to change the node. Another event will come.
obj.parent.DispatchEvent(['*', node.meshid], obj, event);
});
});
}
function guidToStr(g) { return g.substring(6, 8) + g.substring(4, 6) + g.substring(2, 4) + g.substring(0, 2) + "-" + g.substring(10, 12) + g.substring(8, 10) + "-" + g.substring(14, 16) + g.substring(12, 14) + "-" + g.substring(16, 20) + "-" + g.substring(20); }
return obj;
};
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