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sdpController.js
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sdpController.js
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/*
* Copyright 2016 Waverley Labs, LLC
*
* This file is part of SDPcontroller
*
* SDPcontroller is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* SDPcontroller is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
// Load the libraries
var tls = require('tls');
var fs = require('fs');
var mysql = require("mysql");
var credentialMaker = require('./sdpCredentialMaker');
var prompt = require("prompt");
// If the user specified the config path, get it
if(process.argv.length > 2) {
try {
var config = require(process.argv[2]);
} catch (e) {
// It isn't accessible
console.log("Did not find specified config file. Exiting");
process.exit();
}
} else {
var config = require('./config.js');
}
const MSG_SIZE_FIELD_LEN = 4;
const encryptionKeyLenMin = 64;
const encryptionKeyLenMax = 256;
const hmacKeyLenMin = 64;
const hmacKeyLenMax = 256;
// a couple global variables
var db;
var dbPassword = config.dbPassword;
var serverKeyPassword = config.serverKeyPassword;
var myCredentialMaker = new credentialMaker(config);
var connectedGateways = [];
var connectedClients = [];
var nextConnectionId = 1;
var checkDatabaseTries = 0;
var checkOpenConnectionsTries = 0;
var lastDatabaseCheck = new Date();
var lastConnectionCheck = new Date();
// check a couple config settings
if(config.encryptionKeyLen < encryptionKeyLenMin
|| config.encryptionKeyLen > encryptionKeyLenMax)
{
var explanation = "Range is " + encryptionKeyLenMin + " to " + encryptionKeyLenMax;
throw new sdpConfigException("encryptionKeyLen", explanation);
}
if(config.hmacKeyLen < hmacKeyLenMin
|| config.hmacKeyLen > hmacKeyLenMax)
{
var explanation = "Range is " + hmacKeyLenMin + " to " + hmacKeyLenMax
throw new sdpConfigException("hmacKeyLen", explanation);
}
myCredentialMaker.init(startController);
function startController() {
if(serverKeyPassword || !config.serverKeyPasswordRequired)
checkDbPassword();
else
{
var schema = {
properties: {
password: {
description: 'Enter server key password',
hidden: true,
replace: '*',
required: true
}
}
};
prompt.start();
prompt.get(schema, function(err,result) {
if(err)
{
throw err;
}
else
{
serverKeyPassword = result.password;
checkDbPassword();
}
});
}
}
function checkDbPassword() {
if(dbPassword || !config.dbPasswordRequired)
startDbPool();
else
{
var schema = {
properties: {
password: {
description: 'Enter database password',
hidden: true,
replace: '*',
required: true
}
}
};
prompt.start();
prompt.get(schema, function(err,result) {
if(err)
console.log(err);
else
{
dbPassword = result.password;
startDbPool();
}
});
}
}
function startDbPool() {
// set up database pool
if(config.dbPasswordRequired == false) {
db = mysql.createPool({
connectionLimit: config.maxConnections,
host: config.dbHost,
user: config.dbUser,
database: config.dbName,
debug: false
});
} else {
db = mysql.createPool({
connectionLimit: config.maxConnections,
host: config.dbHost,
user: config.dbUser,
password: dbPassword, //config.dbPassword,
database: config.dbName,
debug: false
});
}
startServer();
}
function startServer() {
cleanOpenConnectionTable();
setTimeout(checkDatabaseForUpdates,
config.databaseMonitorInterval,
config.databaseMonitorInterval);
// tls server options
const options = {
// the server's private key
key: fs.readFileSync(config.serverKey),
passphrase: serverKeyPassword,
// the server's public cert
cert: fs.readFileSync(config.serverCert),
// require client certs
requestCert: true,
rejectUnauthorized: true,
// for client certs created by us
ca: [ fs.readFileSync(config.caCert) ]
};
// Start a TLS Server
var server = tls.createServer(options, function (socket) {
if(config.debug)
console.log("Socket connection started");
var action = null;
var memberDetails = null;
var dataTransmitTries = 0;
var credentialMakerTries = 0;
var databaseConnTries = 0;
var badMessagesReceived = 0;
var newKeys = null;
var accessRefreshDue = false;
var connectionId = nextConnectionId;
var expectedMessageSize = 0;
var totalSizeBytesReceived = 0;
var sizeBytesNeeded = 0;
var dataBytesToRead = 0;
var totalMessageBytesReceived = 0;
var sizeBuffer = Buffer.allocUnsafe(MSG_SIZE_FIELD_LEN);
var messageBuffer = Buffer.allocUnsafe(0);
if(Number.MAX_SAFE_INTEGER == connectionId) // 9007199254740991
nextConnectionId = 1;
else
nextConnectionId += 1;
// Identify the connecting client or gateway
var sdpId = parseInt(socket.getPeerCertificate().subject.CN);
console.log("Connection from SDP ID " + sdpId + ", connection ID " + connectionId);
// Set the socket timeout to watch for inactivity
if(config.socketTimeout)
socket.setTimeout(config.socketTimeout, function() {
console.error("Connection to SDP ID " + sdpId + ", connection ID " + connectionId + " has timed out. Disconnecting.");
//if(memberDetails.type === 'gateway') {
// removeOpenConnections(connectionId);
//}
//removeFromConnectionList(memberDetails, connectionId);
});
// Handle incoming requests from members
socket.on('data', function (data) {
while(data.length) {
// have we set the full message size variable yet
if(expectedMessageSize == 0) {
sizeBytesNeeded = MSG_SIZE_FIELD_LEN - totalSizeBytesReceived;
// exceptional case, so few bytes arrived
// not enough data to read expected message size
if( data.length < sizeBytesNeeded ) {
data.copy(sizeBuffer, totalSizeBytesReceived, 0, data.length);
totalSizeBytesReceived += data.length;
data = Buffer.allocUnsafe(0);
return;
}
data.copy(sizeBuffer, totalSizeBytesReceived, 0, sizeBytesNeeded);
totalSizeBytesReceived = MSG_SIZE_FIELD_LEN;
expectedMessageSize = sizeBuffer.readUInt32BE(0);
// time to reset the buffer
messageBuffer = Buffer.allocUnsafe(0);
}
// if there's more data in the received buffer besides the message size field (i.e. actual message contents)
if( data.length > sizeBytesNeeded ) {
// if there are fewer bytes than what's needed to complete the message
if( (data.length - sizeBytesNeeded) < (expectedMessageSize - totalMessageBytesReceived) ){
// then read from after the size field to end of the received buffer
dataBytesToRead = data.length - sizeBytesNeeded;
}
else {
dataBytesToRead = expectedMessageSize - totalMessageBytesReceived;
}
totalMessageBytesReceived += dataBytesToRead;
messageBuffer = Buffer.concat([messageBuffer,
data.slice(sizeBytesNeeded, sizeBytesNeeded+dataBytesToRead)],
totalMessageBytesReceived);
}
// if the message is now complete, process
if(totalMessageBytesReceived == expectedMessageSize) {
expectedMessageSize = 0;
totalSizeBytesReceived = 0;
totalMessageBytesReceived = 0;
processMessage(messageBuffer);
}
data = data.slice(sizeBytesNeeded+dataBytesToRead);
sizeBytesNeeded = 0;
dataBytesToRead = 0;
}
});
socket.on('end', function () {
console.log("Connection to SDP ID " + sdpId + ", connection ID " + connectionId + " closed.");
if(memberDetails.type === 'gateway') {
removeOpenConnections(connectionId);
}
removeFromConnectionList(memberDetails, connectionId);
});
socket.on('error', function (error) {
console.error(error);
if(memberDetails.type === 'gateway') {
removeOpenConnections(connectionId);
}
removeFromConnectionList(memberDetails, connectionId);
socket.end();
});
// Find sdpId in the database
db.getConnection(function(error,connection){
if(error){
console.error("Error connecting to database: " + error);
writeToSocket(socket, JSON.stringify({action: 'database_error'}), true);
return;
}
var databaseErrorCallback = function(error) {
connection.removeListener('error', databaseErrorCallback);
connection.release();
console.error("Error from database connection: " + error);
return;
};
connection.on('error', databaseErrorCallback);
connection.query('SELECT * FROM `sdpid` WHERE `sdpid` = ?', [sdpId],
function (error, rows, fields) {
connection.removeListener('error', databaseErrorCallback);
connection.release();
if (error) {
console.error("Query returned error: " + error);
console.error(error);
writeToSocket(socket, JSON.stringify({action: 'database_error'}), true);
} else if (rows.length < 1) {
console.error("SDP ID not found, notifying and disconnecting");
writeToSocket(socket, JSON.stringify({action: 'unknown_sdp_id'}), true);
} else if (rows.length > 1) {
console.error("Query returned multiple rows for SDP ID: " + sdpId);
writeToSocket(socket, JSON.stringify({action: 'database_error'}), true);
} else if (rows[0].valid == 0) {
console.error("SDP ID " + sdpId+" disabled. Disconnecting.");
writeToSocket(socket, JSON.stringify({action: 'sdpid_unauthorized'}), true);
} else {
memberDetails = rows[0];
// add the connection to the appropriate list
var destList;
if(memberDetails.type === 'gateway') {
destList = connectedGateways;
} else {
destList = connectedClients;
}
// first ensure no duplicate connection entries are left around
for(var idx = 0; idx < destList.length; idx++) {
if(destList[idx].sdpId == memberDetails.sdpid) {
// this next call triggers socket.on('end'...
// which removes the entry from the connection list
writeToSocket(destList[idx].socket,
JSON.stringify({action: 'duplicate_connection'}),
true
);
// the check above means there should never be more than 1 match
// and letting the loop keep checking introduces race condition
// because the .end callback also loops through the list
// and will delete one list entry
break;
}
}
// now add the connection to the right list
newEntry = {
sdpId: memberDetails.sdpid,
connectionId: connectionId,
connectionTime: new Date(),
socket
};
//if(memberDetails.type === 'gateway') {
// newEntry.connections = null;
//}
destList.push(newEntry);
if (config.debug) {
console.log("Connected gateways: \n", connectedGateways, "\n");
console.log("Connected clients: \n", connectedClients, "\n");
console.log("Data for client is: ");
console.log(memberDetails);
}
// possibly send credential update
var now = new Date();
if(now > memberDetails.cred_update_due) {
handleCredentialUpdate();
} else {
writeToSocket(socket, JSON.stringify({action: 'credentials_good'}), false);
}
}
});
});
// Parse SDP messages
function processMessage(data) {
if(config.debug) {
console.log("Message Data Received: ");
console.log(data.toString());
}
// Ignore message if not yet ready
// Clients are not supposed to send the first message
if(!memberDetails){
console.log("Ignoring premature message.");
return;
}
try {
var message = JSON.parse(data);
}
catch (err) {
console.error("Error processing the following received data: \n" + data.toString());
console.error("JSON parse failed with error: " + err);
handleBadMessage(data.toString());
return;
}
if(config.debug) {
console.log("Message parsed");
console.log("Message received from SDP ID " + memberDetails.sdpid);
console.log("JSON-Parsed Message Data Received: ");
for(var myKey in message) {
console.log("key: " + myKey + " value: " + message[myKey]);
}
}
action = message['action'];
if (action === 'credential_update_request') {
handleCredentialUpdate();
} else if (action === 'credential_update_ack') {
handleCredentialUpdateAck();
} else if (action === 'keep_alive') {
handleKeepAlive();
} else if (action === 'service_refresh_request') {
handleServiceRefresh();
} else if (action === 'service_ack') {
handleServiceAck();
} else if (action === 'access_refresh_request') {
handleAccessRefresh();
} else if (action === 'access_update_request') {
handleAccessUpdate(message);
} else if (action === 'access_ack') {
handleAccessAck();
} else if (action === 'connection_update') {
handleConnectionUpdate(message);
} else if (action === 'bad_message') {
// doing nothing with these yet
return;
} else {
console.error("Invalid message received, invalid or missing action");
handleBadMessage(data.toString());
}
}
function handleKeepAlive() {
if (config.debug) {
console.log("Received keep_alive from SDP ID "+memberDetails.sdpid+", responding now.");
}
var keepAliveMessage = {
action: 'keep_alive'
};
// For testing only, send a bunch of copies fast
if (config.testManyMessages > 0) {
console.log("Sending " +config.testManyMessages+ " extra messages first for testing rather than just 1");
var jsonMsgString = JSON.stringify(keepAliveMessage);
for(var ii = 0; ii < config.testManyMessages; ii++) {
writeToSocket(socket, jsonMsgString, false);
}
}
writeToSocket(socket, JSON.stringify(keepAliveMessage), false);
//console.log("keepAlive message written to socket");
}
function handleCredentialUpdate() {
if (dataTransmitTries >= config.maxDataTransmitTries) {
// Data transmission has failed
console.error("Data transmission to SDP ID " + memberDetails.sdpid +
" has failed after " + (dataTransmitTries+1) + " attempts");
console.error("Closing connection");
socket.end();
return;
}
// get the credentials
myCredentialMaker.getNewCredentials(memberDetails, function(err, data){
if (err) {
credentialMakerTries++;
if (credentialMakerTries >= config.maxCredentialMakerTries) {
// Credential making has failed
console.error("Failed to make credentials for SDP ID " + memberDetails.sdpid +
" " + credentialMakerTries + " times.");
console.error("Closing connection");
var credErrMessage = {
action: 'credential_update_error',
data: 'Failed to generate credentials '+credentialMakerTries+
' times. Disconnecting.'
};
writeToSocket(socket, JSON.stringify(credErrMessage), true);
return;
}
// otherwise, just notify requestor of error
var credErrMessage = {
action: 'credential_update_error',
data: 'Could not generate new credentials',
};
console.log("Sending credential_update_error message to SDP ID " +
memberDetails.sdpid + ", failed attempt: " + credentialMakerTries);
writeToSocket(socket, JSON.stringify(credErrMessage), false);
} else {
// got credentials, send them over
var newCredMessage = {
action: 'credential_update',
data
};
var updated = new Date();
var expires = new Date();
expires.setDate(expires.getDate() + config.daysToExpiration);
expires.setHours(0);
expires.setMinutes(0);
expires.setSeconds(0);
expires.setMilliseconds(0);
newKeys = {
spa_encryption_key_base64: data.spa_encryption_key_base64,
spa_hmac_key_base64: data.spa_hmac_key_base64,
updated,
expires
};
console.log("Sending credential_update message to SDP ID " + memberDetails.sdpid + ", attempt: " + dataTransmitTries);
dataTransmitTries++;
writeToSocket(socket, JSON.stringify(newCredMessage), false);
}
});
} // END FUNCTION handleCredentialUpdate
function handleCredentialUpdateAck() {
console.log("Received credential update acknowledgement from SDP ID "+memberDetails.sdpid+
", data successfully delivered");
// store the necessary info in the database
storeKeysInDatabase();
} // END FUNCTION handleCredentialUpdateAck
function notifyGateways() {
// get database connection
db.getConnection(function(error,connection){
if(error){
console.error("Error connecting to database in preparation " +
"to notify gateways of a client's credential update: " + error);
// notify the requestor of our database troubles
writeToSocket(socket,
JSON.stringify({
action: 'notify_gateways_error',
data: 'Database unreachable. Gateways not notified of credential update.'
}),
false
);
return;
}
var databaseErrorCallback = function(error) {
connection.removeListener('error', databaseErrorCallback);
connection.release();
console.error("Error from database connection: " + error);
return;
};
connection.on('error', databaseErrorCallback);
// this next query requires a simple array of only
// the sdp ids listed in connectedGateways
var gatewaySdpIdList = [];
for(var idx = 0; idx < connectedGateways.length; idx++) {
gatewaySdpIdList.push(connectedGateways[idx].sdpId);
}
if(gatewaySdpIdList.length < 1)
{
console.log("No relevant gateways to notify regarding credential update to SDP ID "+memberDetails.sdpid);
return;
}
if(config.allowLegacyAccessRequests)
{
connection.query(
'(SELECT ' +
' `service_gateway`.`gateway_sdpid`, ' +
' `service_gateway`.`service_id`, ' +
' `service_gateway`.`protocol`, ' +
' `service_gateway`.`port`, ' +
' `sdpid`.`encrypt_key`, ' +
' `sdpid`.`hmac_key` ' +
'FROM `service_gateway` ' +
' JOIN `sdpid_service` ' +
' ON `sdpid_service`.`service_id` = `service_gateway`.`service_id` ' +
' JOIN `sdpid` ' +
' ON `sdpid`.`sdpid` = `sdpid_service`.`sdpid` ' +
'WHERE ' +
' `service_gateway`.`gateway_sdpid` IN (?) AND ' +
' `sdpid`.`sdpid` = ? )' +
'UNION ' +
'(SELECT ' +
' `service_gateway`.`gateway_sdpid`, ' +
' `group_service`.`service_id`, ' +
' `service_gateway`.`protocol`, ' +
' `service_gateway`.`port`, ' +
' `sdpid`.`encrypt_key`, ' +
' `sdpid`.`hmac_key` ' +
'FROM `service_gateway` ' +
' JOIN `group_service` ' +
' ON `group_service`.`service_id` = `service_gateway`.`service_id` ' +
' JOIN `group` ' +
' ON `group`.`id` = `group_service`.`group_id` ' +
' JOIN `user_group` ' +
' ON `user_group`.`group_id` = `group`.`id` ' +
' JOIN `sdpid` ' +
' ON `sdpid`.`user_id` = `user_group`.`user_id` ' +
'WHERE ' +
' `service_gateway`.`gateway_sdpid` IN (?) AND ' +
' `sdpid`.`sdpid` = ? AND ' +
' `group`.`valid` = 1 )' +
'ORDER BY `gateway_sdpid` ',
[gatewaySdpIdList,
memberDetails.sdpid,
gatewaySdpIdList,
memberDetails.sdpid],
function (error, rows, fields) {
connection.removeListener('error', databaseErrorCallback);
connection.release();
if(error) {
console.error("Access data query returned error: " + error);
writeToSocket(socket,
JSON.stringify({
action: 'notify_gateways_error',
data: 'Database error. Gateways not notified of credential update.'
}),
false
);
return;
}
if(rows.length == 0) {
console.log("No relevant gateways to notify regarding credential update to SDP ID "+memberDetails.sdpid);
return;
}
var thisRow = rows[0];
var currentGatewaySdpId = thisRow.gateway_sdpid;
var open_ports = thisRow.protocol + "/" + thisRow.port;
var service_list = thisRow.service_id.toString();
var encryptKey = thisRow.encrypt_key;
var hmacKey = thisRow.hmac_key;
for(var rowIdx = 0; rowIdx < rows.length; rowIdx++) {
thisRow = rows[rowIdx];
if(thisRow.gateway_sdpid != currentGatewaySdpId) {
currentGatewaySdpId = thisRow.gateway_sdpid;
service_list = thisRow.service_id.toString();
open_ports = thisRow.protocol + "/" + thisRow.port;
encryptKey = thisRow.encrypt_key;
hmacKey = thisRow.hmac_key;
} else if(rowIdx != 0) {
service_list += ", " + thisRow.service_id.toString();
open_ports += ", " + thisRow.protocol + "/" + thisRow.port;
}
// if this is the last data row or the next is a different gateway
if( (rowIdx + 1) == rows.length ||
rows[rowIdx + 1].gateway_sdpid != currentGatewaySdpId ) {
// send off this stanza data
notifyGateway(currentGatewaySdpId,
memberDetails.sdpid,
service_list,
open_ports,
encryptKey,
hmacKey);
}
}
// only after successful notification
if(memberDetails.type === 'client' &&
!config.keepClientsConnected)
{
socket.end();
}
} // END QUERY CALLBACK FUNCTION
); // END QUERY DEFINITION
} // END IF allowLegacyAccessRequests
else
{
connection.query(
'(SELECT ' +
' `service_gateway`.`gateway_sdpid`, ' +
' `service_gateway`.`service_id`, ' +
' `sdpid`.`encrypt_key`, ' +
' `sdpid`.`hmac_key` ' +
'FROM `service_gateway` ' +
' JOIN `sdpid_service` ' +
' ON `sdpid_service`.`service_id` = `service_gateway`.`service_id` ' +
' JOIN `sdpid` ' +
' ON `sdpid`.`sdpid` = `sdpid_service`.`sdpid` ' +
'WHERE ' +
' `service_gateway`.`gateway_sdpid` IN (?) AND ' +
' `sdpid`.`sdpid` = ? )' +
'UNION ' +
'(SELECT ' +
' `service_gateway`.`gateway_sdpid`, ' +
' `group_service`.`service_id`, ' +
' `sdpid`.`encrypt_key`, ' +
' `sdpid`.`hmac_key` ' +
'FROM `service_gateway` ' +
' JOIN `group_service` ' +
' ON `group_service`.`service_id` = `service_gateway`.`service_id` ' +
' JOIN `group` ' +
' ON `group`.`id` = `group_service`.`group_id` ' +
' JOIN `user_group` ' +
' ON `user_group`.`group_id` = `group`.`id` ' +
' JOIN `sdpid` ' +
' ON `sdpid`.`user_id` = `user_group`.`user_id` ' +
'WHERE ' +
' `service_gateway`.`gateway_sdpid` IN (?) AND ' +
' `sdpid`.`sdpid` = ? AND ' +
' `group`.`valid` = 1 )' +
'ORDER BY `gateway_sdpid` ',
[gatewaySdpIdList,
memberDetails.sdpid,
gatewaySdpIdList,
memberDetails.sdpid],
function (error, rows, fields) {
connection.removeListener('error', databaseErrorCallback);
connection.release();
if(error) {
console.error("Access data query returned error: " + error);
writeToSocket(socket,
JSON.stringify({
action: 'notify_gateways_error',
data: 'Database error. Gateways not notified of credential update.'
}),
false
);
return;
}
if(rows.length == 0) {
console.log("No relevant gateways to notify regarding credential update to SDP ID "+memberDetails.sdpid);
return;
}
var thisRow = rows[0];
var currentGatewaySdpId = thisRow.gateway_sdpid;
var service_list = thisRow.service_id.toString();
var encryptKey = thisRow.encrypt_key;
var hmacKey = thisRow.hmac_key;
for(var rowIdx = 0; rowIdx < rows.length; rowIdx++) {
thisRow = rows[rowIdx];
if(thisRow.gateway_sdpid != currentGatewaySdpId) {
currentGatewaySdpId = thisRow.gateway_sdpid;
service_list = thisRow.service_id.toString();
encryptKey = thisRow.encrypt_key;
hmacKey = thisRow.hmac_key;
} else if(rowIdx != 0) {
service_list += ", " + thisRow.service_id.toString();
}
// if this is the last data row or the next is a different gateway
if( (rowIdx + 1) == rows.length ||
rows[rowIdx + 1].gateway_sdpid != currentGatewaySdpId ) {
// send off this stanza data
notifyGateway(currentGatewaySdpId,
memberDetails.sdpid,
service_list,
null,
encryptKey,
hmacKey);
}
}
// only after successful notification
if(memberDetails.type === 'client' &&
!config.keepClientsConnected)
{
socket.end();
}
} // END QUERY CALLBACK FUNCTION
); // END QUERY DEFINITION
} // END ELSE (i.e. NOT allowLegacyAccessRequests)
}); // END DATABASE CONNECTION CALLBACK
} // END FUNCTION notifyGateways
function notifyGateway(gatewaySdpId, clientSdpId, service_list, open_ports, encKey, hmacKey) {
var gatewaySocket = null;
// get the right socket
for(var idx = 0; idx < connectedGateways.length; idx++) {
if(connectedGateways[idx].sdpId == gatewaySdpId) {
gatewaySocket = connectedGateways[idx].socket;
break;
}
}
debugger;
if(!gatewaySocket) {
console.log("Attempted to notify gateway with SDP ID " +gatewaySdpId+
" of a client's updated credentials, but socket not found.");
return;
}
if(open_ports)
{
var data = [{
sdp_id: clientSdpId,
source: "ANY",
service_list: service_list,
open_ports: open_ports,
spa_encryption_key_base64: encKey,
spa_hmac_key_base64: hmacKey
}];
}
else
{
var data = [{
sdp_id: clientSdpId,
source: "ANY",
service_list: service_list,
spa_encryption_key_base64: encKey,
spa_hmac_key_base64: hmacKey
}];
}
if(config.debug) {
console.log("Access update data to send to "+gatewaySdpId+": \n", data);
}
console.log("Sending access_update message to SDP ID " + gatewaySdpId);
writeToSocket(gatewaySocket,
JSON.stringify({
action: 'access_update',
data
}),
false
);
} // END FUNCTION notifyGateway
function removeFromConnectionList(details, connectionId) {
var theList = null;
var found = false;
if(details.type === 'client') {
var theList = connectedClients;
console.log("Searching connected client list for SDP ID " + details.sdpid + ", connection ID " + connectionId);
} else {
var theList = connectedGateways;
console.log("Searching connected gateway list for SDP ID " + details.sdpid + ", connection ID " + connectionId);
}
for(var idx = 0; idx < theList.length; idx++) {
if(theList[idx].connectionId == connectionId) {
theList.splice(idx, 1);
found = true;
break;
}
}
if(found) {
console.log("Found and removed SDP ID "+details.sdpid+ ", connection ID " + connectionId +" from connection list");
} else {
console.log("Did not find SDP ID "+details.sdpid+ ", connection ID " + connectionId +" in the connection list");
}
}
function handleServiceRefresh() {
if (dataTransmitTries >= config.maxDataTransmitTries) {
// Data transmission has failed
console.error("Data transmission to SDP ID " + memberDetails.sdpid +
" has failed after " + (dataTransmitTries+1) + " attempts");
console.error("Closing connection");
socket.end();
return;
}
db.getConnection(function(error,connection){
if(error){
console.error("Error connecting to database: " + error);
// notify the requestor of our database troubles
writeToSocket(socket,
JSON.stringify({
action: 'service_refresh_error',
data: 'Database unreachable. Try again soon.'
}),
false
);
return;
}
var databaseErrorCallback = function(error) {
connection.removeListener('error', databaseErrorCallback);
connection.release();
console.error("Error from database connection: " + error);
return;
};
connection.on('error', databaseErrorCallback);
connection.query(
'SELECT ' +
' `service_gateway`.`protocol`, ' +
' `service_gateway`.`service_id`, ' +
' `service_gateway`.`port`, ' +
' `service_gateway`.`nat_ip`, ' +
' `service_gateway`.`nat_port` ' +
'FROM `service_gateway` ' +
'WHERE `service_gateway`.`gateway_sdpid` = ? ',
[memberDetails.sdpid],
function (error, rows, fields) {
connection.removeListener('error', databaseErrorCallback);
connection.release();
if(error) {
console.error("Service data query returned error: " + error);
writeToSocket(socket,
JSON.stringify({
action: 'service_refresh_error',
data: 'Database error. Try again soon.'
}),
false
);
return;
}
var data = [];
for(var rowIdx = 0; rowIdx < rows.length; rowIdx++) {
var thisRow = rows[rowIdx];
data.push({
service_id: thisRow.service_id,
proto: thisRow.protocol,