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✏️ Editing: network.js

'use strict';
// @ts-check
// ==================================================================================
// network.js
// ----------------------------------------------------------------------------------
// Description:   System Information - library
//                for Node.js
// Copyright:     (c) 2014 - 2021
// Author:        Sebastian Hildebrandt
// ----------------------------------------------------------------------------------
// License:       MIT
// ==================================================================================
// 9. Network
// ----------------------------------------------------------------------------------

const os = require('os');
const exec = require('child_process').exec;
const execSync = require('child_process').execSync;
const fs = require('fs');
const util = require('./util');

let _platform = process.platform;

const _linux = (_platform === 'linux');
const _darwin = (_platform === 'darwin');
const _windows = (_platform === 'win32');
const _freebsd = (_platform === 'freebsd');
const _openbsd = (_platform === 'openbsd');
const _netbsd = (_platform === 'netbsd');
const _sunos = (_platform === 'sunos');

let _network = {};
let _default_iface = '';
let _ifaces = {};
let _dhcpNics = [];
let _networkInterfaces = [];
let _mac = {};
let pathToIp;

function getDefaultNetworkInterface() {

let ifaces = os.networkInterfaces();
  let ifacename = '';
  let ifacenameFirst = '';

let scopeid = 9999;

// fallback - "first" external interface (sorted by scopeid)
  for (let dev in ifaces) {
    if ({}.hasOwnProperty.call(ifaces, dev)) {
      ifaces[dev].forEach(function (details) {
        if (details && details.internal === false) {
          ifacenameFirst = ifacenameFirst || dev; // fallback if no scopeid
          if (details.scopeid && details.scopeid < scopeid) {
            ifacename = dev;
            scopeid = details.scopeid;
          }
        }
      });
    }
  }
  ifacename = ifacename || ifacenameFirst || '';

try {
    if (_windows) {
      // https://www.inetdaemon.com/tutorials/internet/ip/routing/default_route.shtml
      let defaultIp = '';
      const cmd = 'netstat -r';
      const result = execSync(cmd, util.execOptsWin);
      const lines = result.toString().split(os.EOL);
      lines.forEach(line => {
        line = line.replace(/\s+/g, ' ').trim();
        if (line.indexOf('0.0.0.0 0.0.0.0') > -1 && !(/[a-zA-Z]/.test(line))) {
          const parts = line.split(' ');
          if (parts.length >= 5) {
            defaultIp = parts[parts.length - 2];
          }
        }
      });
      if (defaultIp) {
        for (let dev in ifaces) {
          if ({}.hasOwnProperty.call(ifaces, dev)) {
            ifaces[dev].forEach(function (details) {
              if (details && details.address && details.address === defaultIp) {
                ifacename = dev;
              }
            });
          }
        }
      }
    }
    if (_linux) {
      let cmd = 'ip route 2> /dev/null | grep default';
      let result = execSync(cmd);
      let parts = result.toString().split('\n')[0].split(/\s+/);
      if (parts[0] === 'none' && parts[5]) {
        ifacename = parts[5];
      } else if (parts[4]) {
        ifacename = parts[4];
      }

if (ifacename.indexOf(':') > -1) {
        ifacename = ifacename.split(':')[1].trim();
      }
    }
    if (_darwin || _freebsd || _openbsd || _netbsd || _sunos) {
      let cmd = '';
      if (_linux) { cmd = 'ip route 2> /dev/null | grep default | awk \'{print $5}\''; }
      if (_darwin) { cmd = 'route -n get default 2>/dev/null | grep interface: | awk \'{print $2}\''; }
      if (_freebsd || _openbsd || _netbsd || _sunos) { cmd = 'route get 0.0.0.0 | grep interface:'; }
      let result = execSync(cmd);
      ifacename = result.toString().split('\n')[0];
      if (ifacename.indexOf(':') > -1) {
        ifacename = ifacename.split(':')[1].trim();
      }
    }
  } catch (e) {
    util.noop();
  }
  if (ifacename) { _default_iface = ifacename; }
  return _default_iface;
}

exports.getDefaultNetworkInterface = getDefaultNetworkInterface;

if (iface && mac) {
            result[iface] = mac.trim();
            iface = '';
            mac = '';
          }
        }
      }
    } catch (e) {
      util.noop();
    }
  }
  if (_darwin) {
    try {
      const cmd = '/sbin/ifconfig';
      let res = execSync(cmd);
      const lines = res.toString().split('\n');
      for (let i = 0; i < lines.length; i++) {
        if (lines[i] && lines[i][0] !== '\t' && lines[i].indexOf(':') > 0) {
          iface = lines[i].split(':')[0];
        } else if (lines[i].indexOf('\tether ') === 0) {
          mac = lines[i].split('\tether ')[1];
          if (iface && mac) {
            result[iface] = mac.trim();
            iface = '';
            mac = '';
          }
        }
      }
    } catch (e) {
      util.noop();
    }
  }
  return result;
}

function networkInterfaceDefault(callback) {

return new Promise((resolve) => {
    process.nextTick(() => {
      let result = getDefaultNetworkInterface();
      if (callback) { callback(result); }
      resolve(result);
    });
  });
}

exports.networkInterfaceDefault = networkInterfaceDefault;

// --------------------------
// NET - interfaces

function parseLinesWindowsNics(sections, nconfigsections) {
  let nics = [];
  for (let i in sections) {
    if ({}.hasOwnProperty.call(sections, i)) {

if (sections[i].trim() !== '') {

function getWindowsDNSsuffixes() {

let iface = {};

let dnsSuffixes = {
    primaryDNS: '',
    exitCode: 0,
    ifaces: [],
  };

try {
    const ipconfig = execSync('ipconfig /all', util.execOptsWin);
    const ipconfigArray = ipconfig.split('\r\n\r\n');

ipconfigArray.forEach((element, index) => {

if (index == 1) {
        const longPrimaryDNS = element.split('\r\n').filter((element) => {
          return element.toUpperCase().includes('DNS');
        });
        const primaryDNS = longPrimaryDNS[0].substring(longPrimaryDNS[0].lastIndexOf(':') + 1);
        dnsSuffixes.primaryDNS = primaryDNS.trim();
        if (!dnsSuffixes.primaryDNS) { dnsSuffixes.primaryDNS = 'Not defined'; }
      }
      if (index > 1) {
        if (index % 2 == 0) {
          const name = element.substring(element.lastIndexOf(' ') + 1).replace(':', '');
          iface.name = name;
        } else {
          const connectionSpecificDNS = element.split('\r\n').filter((element) => {
            return element.toUpperCase().includes('DNS');
          });
          const dnsSuffix = connectionSpecificDNS[0].substring(connectionSpecificDNS[0].lastIndexOf(':') + 1);
          iface.dnsSuffix = dnsSuffix.trim();
          dnsSuffixes.ifaces.push(iface);
          iface = {};
        }
      }
    });

return dnsSuffixes;
  } catch (error) {
    // console.log('An error occurred trying to bring the Connection-specific DNS suffix', error.message);
    return {
      primaryDNS: '',
      exitCode: 0,
      ifaces: [],
    };
  }
}

if (ifaces === 'Disabled') {
    i8021x.state = 'Disabled';
    i8021x.protocol = 'Not defined';
    return i8021x;
  }

if (connectionType == 'wired' && ifaces.length > 0) {
    try {
      // Get 802.1x information by interface name
      const iface8021xInfo = ifaces.find((element) => {
        return element.includes(iface + '\r\n');
      });
      const arrayIface8021xInfo = iface8021xInfo.split('\r\n');
      const state8021x = arrayIface8021xInfo.find((element) => {
        return element.includes('802.1x');
      });

if (state8021x.includes('Disabled')) {
        i8021x.state = 'Disabled';
        i8021x.protocol = 'Not defined';
      } else if (state8021x.includes('Enabled')) {
        const protocol8021x = arrayIface8021xInfo.find((element) => {
          return element.includes('EAP');
        });
        i8021x.protocol = protocol8021x.split(':').pop();
        i8021x.state = 'Enabled';
      }
    } catch (error) {
      // console.log('Error getting wired information:', error);
      return i8021x;
    }
  } else if (connectionType == 'wireless') {

let i8021xState = '';
    let i8021xProtocol = '';

try {
      const SSID = getWindowsWirelessIfaceSSID(iface);
      if (SSID !== 'Unknown') {
        i8021xState = execSync(`netsh wlan show profiles "${SSID}" | findstr "802.1X"`, util.execOptsWin);
        i8021xProtocol = execSync(`netsh wlan show profiles "${SSID}" | findstr "EAP"`, util.execOptsWin);
      }

if (i8021xState.includes(':') && i8021xProtocol.includes(':')) {
        i8021x.state = i8021xState.split(':').pop();
        i8021x.protocol = i8021xProtocol.split(':').pop();
      }
    } catch (error) {
      // console.log('Error getting wireless information:', error);
      if (error.status === 1 && error.stdout.includes('AutoConfig')) {
        i8021x.state = 'Disabled';
        i8021x.protocol = 'Not defined';
      }
      return i8021x;
    }
  }

return i8021x;
}

function getLinuxIfaceConnectionName(interfaceName) {
  const cmd = `nmcli device status 2>/dev/null | grep ${interfaceName}`;

try {
    const result = execSync(cmd).toString();
    const resultFormat = result.replace(/\s+/g, ' ').trim();
    const connectionNameLines = resultFormat.split(' ').slice(3);
    const connectionName = connectionNameLines.join(' ');
    return connectionName != '--' ? connectionName : '';
  } catch (e) {
    return '';
  }
}

function checkLinuxDCHPInterfaces(file) {
  let result = [];
  try {
    let cmd = `cat ${file} 2> /dev/null | grep 'iface\\|source'`;
    const lines = execSync(cmd, { maxBuffer: 1024 * 20000 }).toString().split('\n');

lines.forEach(line => {
      const parts = line.replace(/\s+/g, ' ').trim().split(' ');
      if (parts.length >= 4) {
        if (line.toLowerCase().indexOf(' inet ') >= 0 && line.toLowerCase().indexOf('dhcp') >= 0) {
          result.push(parts[1]);
        }
      }
      if (line.toLowerCase().includes('source')) {
        let file = line.split(' ')[1];
        result = result.concat(checkLinuxDCHPInterfaces(file));
      }
    });
  } catch (e) {
    util.noop();
  }
  return result;
}

function getLinuxIfaceDHCPstatus(iface, connectionName, DHCPNics) {
  let result = false;
  if (connectionName) {
    const cmd = `nmcli connection show "${connectionName}" 2>/dev/null | grep ipv4.method;`;
    try {
      const lines = execSync(cmd).toString();
      const resultFormat = lines.replace(/\s+/g, ' ').trim();

let dhcStatus = resultFormat.split(' ').slice(1).toString();
      switch (dhcStatus) {
        case 'auto':
          result = true;
          break;

default:
          result = false;
          break;
      }
      return result;
    } catch (e) {
      return (DHCPNics.indexOf(iface) >= 0);
    }
  } else {
    return (DHCPNics.indexOf(iface) >= 0);
  }
}

function getLinuxIfaceIEEE8021xAuth(connectionName) {
  if (connectionName) {
    const cmd = `nmcli connection show "${connectionName}" 2>/dev/null | grep 802-1x.eap;`;
    try {
      const result = execSync(cmd).toString();
      const resultFormat = result.replace(/\s+/g, ' ').trim();
      const authenticationProtocol = resultFormat.split(' ').slice(1).toString();

return authenticationProtocol == '--' ? '' : authenticationProtocol;
    } catch (e) {
      return 'Not defined';
    }
  } else {
    return 'Not defined';
  }
}

function networkInterfaces(callback, rescan = true) {

if (typeof callback === 'boolean') {
    rescan = callback;
    callback = null;
  }
  return new Promise((resolve) => {
    process.nextTick(() => {
      let ifaces = os.networkInterfaces();

let result = [];
      let nics = [];
      let dnsSuffixes = [];
      let nics8021xInfo = [];
      // seperate handling in OSX
      if (_darwin || _freebsd || _openbsd || _netbsd) {
        nics = getDarwinNics();

nics.forEach(nic => {

if ({}.hasOwnProperty.call(ifaces, nic.iface)) {
            ifaces[nic.iface].forEach(function (details) {
              if (details.family === 'IPv4') {
                nic.ip4subnet = details.netmask;
              }
              if (details.family === 'IPv6') {
                nic.ip6subnet = details.netmask;
              }
            });
          }

result.push({
            iface: nic.iface,
            ifaceName: nic.iface,
            ip4: nic.ip4,
            ip4subnet: nic.ip4subnet || '',
            ip6: nic.ip6,
            ip6subnet: nic.ip6subnet || '',
            mac: nic.mac,
            internal: nic.internal,
            virtual: nic.internal ? false : testVirtualNic(nic.iface, nic.iface, nic.mac),
            operstate: nic.operstate,
            type: nic.type,
            duplex: nic.duplex,
            mtu: nic.mtu,
            speed: nic.speed,
            dhcp: getDarwinIfaceDHCPstatus(nic.iface),
            dnsSuffix: '',
            ieee8021xAuth: '',
            ieee8021xState: '',
            carrierChanges: 0
          });
        });
        _networkInterfaces = result;
        if (callback) { callback(result); }
        resolve(result);
      } else {
        if ((JSON.stringify(ifaces) === JSON.stringify(_ifaces)) && !rescan) {
          // no changes - just return object
          result = _networkInterfaces;

if (callback) { callback(result); }
          resolve(result);
        } else {
          _ifaces = Object.assign({}, ifaces);

if (_windows) {
            nics = getWindowsNics();
            nics.forEach(nic => {
              let found = false;
              Object.keys(ifaces).forEach(key => {
                if (!found) {
                  ifaces[key].forEach(value => {
                    if (Object.keys(value).indexOf('mac') >= 0) {
                      found = value['mac'] === nic.mac;
                    }
                  });
                }
              });

if (!found) {
                ifaces[nic.name] = [{ mac: nic.mac }];
              }
            });

nics8021xInfo = getWindowsWiredProfilesInformation();
            dnsSuffixes = getWindowsDNSsuffixes();
          }
          if (_linux) {
            _dhcpNics = getLinuxDHCPNics();
          }
          for (let dev in ifaces) {
            let iface = dev;
            let ip4 = '';
            let ip4subnet = '';
            let ip6 = '';
            let ip6subnet = '';
            let mac = '';
            let duplex = '';
            let mtu = '';
            let speed = null;
            let carrierChanges = 0;
            let operstate = 'down';
            let dhcp = false;
            let dnsSuffix = '';
            let ieee8021xAuth = '';
            let ieee8021xState = '';
            let type = '';

if ({}.hasOwnProperty.call(ifaces, dev)) {
              let ifaceName = dev;
              ifaces[dev].forEach(function (details) {
                if (details.family === 'IPv4') {
                  ip4 = details.address;
                  ip4subnet = details.netmask;
                }
                if (details.family === 'IPv6') {
                  if (!ip6 || ip6.match(/^fe80::/i)) {
                    ip6 = details.address;
                    ip6subnet = details.netmask;
                  }
                }
                mac = details.mac;
                // fallback due to https://github.com/nodejs/node/issues/13581 (node 8.1 - node 8.2)
                const nodeMainVersion = parseInt(process.versions.node.split('.'), 10);
                if (mac.indexOf('00:00:0') > -1 && (_linux || _darwin) && (!details.internal) && nodeMainVersion >= 8 && nodeMainVersion <= 11) {
                  if (Object.keys(_mac).length === 0) {
                    _mac = getMacAddresses();
                  }
                  mac = _mac[dev] || '';
                }
              });
              if (_linux) {
                let iface = dev.split(':')[0].trim().toLowerCase();
                const cmd = `echo -n "addr_assign_type: "; cat /sys/class/net/${iface}/addr_assign_type 2>/dev/null; echo;
            echo -n "address: "; cat /sys/class/net/${iface}/address 2>/dev/null; echo;
            echo -n "addr_len: "; cat /sys/class/net/${iface}/addr_len 2>/dev/null; echo;
            echo -n "broadcast: "; cat /sys/class/net/${iface}/broadcast 2>/dev/null; echo;
            echo -n "carrier: "; cat /sys/class/net/${iface}/carrier 2>/dev/null; echo;
            echo -n "carrier_changes: "; cat /sys/class/net/${iface}/carrier_changes 2>/dev/null; echo;
            echo -n "dev_id: "; cat /sys/class/net/${iface}/dev_id 2>/dev/null; echo;
            echo -n "dev_port: "; cat /sys/class/net/${iface}/dev_port 2>/dev/null; echo;
            echo -n "dormant: "; cat /sys/class/net/${iface}/dormant 2>/dev/null; echo;
            echo -n "duplex: "; cat /sys/class/net/${iface}/duplex 2>/dev/null; echo;
            echo -n "flags: "; cat /sys/class/net/${iface}/flags 2>/dev/null; echo;
            echo -n "gro_flush_timeout: "; cat /sys/class/net/${iface}/gro_flush_timeout 2>/dev/null; echo;
            echo -n "ifalias: "; cat /sys/class/net/${iface}/ifalias 2>/dev/null; echo;
            echo -n "ifindex: "; cat /sys/class/net/${iface}/ifindex 2>/dev/null; echo;
            echo -n "iflink: "; cat /sys/class/net/${iface}/iflink 2>/dev/null; echo;
            echo -n "link_mode: "; cat /sys/class/net/${iface}/link_mode 2>/dev/null; echo;
            echo -n "mtu: "; cat /sys/class/net/${iface}/mtu 2>/dev/null; echo;
            echo -n "netdev_group: "; cat /sys/class/net/${iface}/netdev_group 2>/dev/null; echo;
            echo -n "operstate: "; cat /sys/class/net/${iface}/operstate 2>/dev/null; echo;
            echo -n "proto_down: "; cat /sys/class/net/${iface}/proto_down 2>/dev/null; echo;
            echo -n "speed: "; cat /sys/class/net/${iface}/speed 2>/dev/null; echo;
            echo -n "tx_queue_len: "; cat /sys/class/net/${iface}/tx_queue_len 2>/dev/null; echo;
            echo -n "type: "; cat /sys/class/net/${iface}/type 2>/dev/null; echo;
            echo -n "wireless: "; cat /proc/net/wireless 2>/dev/null | grep ${iface}; echo;
            echo -n "wirelessspeed: "; iw dev ${iface} link 2>&1 | grep bitrate; echo;`;

dnsSuffix = getWindowsIfaceDNSsuffix(dnsSuffixes.ifaces, dev);
                let foundFirst = false;
                nics.forEach(detail => {
                  if (detail.mac === mac && !foundFirst) {
                    iface = detail.iface || iface;
                    ifaceName = detail.name;
                    dhcp = detail.dhcp;
                    operstate = detail.operstate;
                    speed = detail.speed;
                    type = detail.type;
                    foundFirst = true;
                  }
                });

if (dev.toLowerCase().indexOf('wlan') >= 0 || ifaceName.toLowerCase().indexOf('wlan') >= 0 || ifaceName.toLowerCase().indexOf('802.11n') >= 0 || ifaceName.toLowerCase().indexOf('wireless') >= 0 || ifaceName.toLowerCase().indexOf('wi-fi') >= 0 || ifaceName.toLowerCase().indexOf('wifi') >= 0) {
                  type = 'wireless';
                }

exports.networkInterfaces = networkInterfaces;

// --------------------------
// NET - Speed

function calcNetworkSpeed(iface, rx_bytes, tx_bytes, operstate, rx_dropped, rx_errors, tx_dropped, tx_errors) {
  let result = {
    iface,
    operstate,
    rx_bytes,
    rx_dropped,
    rx_errors,
    tx_bytes,
    tx_dropped,
    tx_errors,
    rx_sec: null,
    tx_sec: null,
    ms: 0
  };

if (_network[iface] && _network[iface].ms) {
    result.ms = Date.now() - _network[iface].ms;
    result.rx_sec = (rx_bytes - _network[iface].rx_bytes) >= 0 ? (rx_bytes - _network[iface].rx_bytes) / (result.ms / 1000) : 0;
    result.tx_sec = (tx_bytes - _network[iface].tx_bytes) >= 0 ? (tx_bytes - _network[iface].tx_bytes) / (result.ms / 1000) : 0;
    _network[iface].rx_bytes = rx_bytes;
    _network[iface].tx_bytes = tx_bytes;
    _network[iface].rx_sec = result.rx_sec;
    _network[iface].tx_sec = result.tx_sec;
    _network[iface].ms = Date.now();
    _network[iface].last_ms = result.ms;
    _network[iface].operstate = operstate;
  } else {
    if (!_network[iface]) { _network[iface] = {}; }
    _network[iface].rx_bytes = rx_bytes;
    _network[iface].tx_bytes = tx_bytes;
    _network[iface].rx_sec = null;
    _network[iface].tx_sec = null;
    _network[iface].ms = Date.now();
    _network[iface].last_ms = 0;
    _network[iface].operstate = operstate;
  }
  return result;
}

function networkStats(ifaces, callback) {

let ifacesArray = [];

return new Promise((resolve) => {
    process.nextTick(() => {

// fallback - if only callback is given
      if (util.isFunction(ifaces) && !callback) {
        callback = ifaces;
        ifacesArray = [getDefaultNetworkInterface()];
      } else {
        if (typeof ifaces !== 'string' && ifaces !== undefined) {
          if (callback) { callback([]); }
          return resolve([]);
        }
        ifaces = ifaces || getDefaultNetworkInterface();

ifaces.__proto__.toLowerCase = util.stringToLower;
        ifaces.__proto__.replace = util.stringReplace;
        ifaces.__proto__.trim = util.stringTrim;

ifaces = ifaces.trim().toLowerCase().replace(/,+/g, '|');
        ifacesArray = ifaces.split('|');
      }

const result = [];

function networkStatsSingle(iface) {

return new Promise((resolve) => {
    process.nextTick(() => {
      let ifaceSanitized = '';
      const s = util.isPrototypePolluted() ? '---' : util.sanitizeShellString(iface);
      for (let i = 0; i <= util.mathMin(s.length, 2000); i++) {
        if (!(s[i] === undefined)) {
          ifaceSanitized = ifaceSanitized + s[i];
        }
      }

let result = {
        iface: ifaceSanitized,
        operstate: 'unknown',
        rx_bytes: 0,
        rx_dropped: 0,
        rx_errors: 0,
        tx_bytes: 0,
        tx_dropped: 0,
        tx_errors: 0,
        rx_sec: null,
        tx_sec: null,
        ms: 0
      };

let operstate = 'unknown';
      let rx_bytes = 0;
      let tx_bytes = 0;
      let rx_dropped = 0;
      let rx_errors = 0;
      let tx_dropped = 0;
      let tx_errors = 0;

let cmd, lines, stats;
      if (!_network[ifaceSanitized] || (_network[ifaceSanitized] && !_network[ifaceSanitized].ms) || (_network[ifaceSanitized] && _network[ifaceSanitized].ms && Date.now() - _network[ifaceSanitized].ms >= 500)) {
        if (_linux) {
          if (fs.existsSync('/sys/class/net/' + ifaceSanitized)) {
            cmd =
              'cat /sys/class/net/' + ifaceSanitized + '/operstate; ' +
              'cat /sys/class/net/' + ifaceSanitized + '/statistics/rx_bytes; ' +
              'cat /sys/class/net/' + ifaceSanitized + '/statistics/tx_bytes; ' +
              'cat /sys/class/net/' + ifaceSanitized + '/statistics/rx_dropped; ' +
              'cat /sys/class/net/' + ifaceSanitized + '/statistics/rx_errors; ' +
              'cat /sys/class/net/' + ifaceSanitized + '/statistics/tx_dropped; ' +
              'cat /sys/class/net/' + ifaceSanitized + '/statistics/tx_errors; ';
            exec(cmd, function (error, stdout) {
              if (!error) {
                lines = stdout.toString().split('\n');
                operstate = lines[0].trim();
                rx_bytes = parseInt(lines[1], 10);
                tx_bytes = parseInt(lines[2], 10);
                rx_dropped = parseInt(lines[3], 10);
                rx_errors = parseInt(lines[4], 10);
                tx_dropped = parseInt(lines[5], 10);
                tx_errors = parseInt(lines[6], 10);

result = calcNetworkSpeed(ifaceSanitized, rx_bytes, tx_bytes, operstate, rx_dropped, rx_errors, tx_dropped, tx_errors);

}
              resolve(result);
            });
          } else {
            resolve(result);
          }
        }
        if (_freebsd || _openbsd || _netbsd) {
          cmd = 'netstat -ibndI ' + ifaceSanitized;   // lgtm [js/shell-command-constructed-from-input]
          exec(cmd, function (error, stdout) {
            if (!error) {
              lines = stdout.toString().split('\n');
              for (let i = 1; i < lines.length; i++) {
                const line = lines[i].replace(/ +/g, ' ').split(' ');
                if (line && line[0] && line[7] && line[10]) {
                  rx_bytes = rx_bytes + parseInt(line[7]);
                  if (line[6].trim() !== '-') { rx_dropped = rx_dropped + parseInt(line[6]); }
                  if (line[5].trim() !== '-') { rx_errors = rx_errors + parseInt(line[5]); }
                  tx_bytes = tx_bytes + parseInt(line[10]);
                  if (line[12].trim() !== '-') { tx_dropped = tx_dropped + parseInt(line[12]); }
                  if (line[9].trim() !== '-') { tx_errors = tx_errors + parseInt(line[9]); }
                  operstate = 'up';
                }
              }
              result = calcNetworkSpeed(ifaceSanitized, rx_bytes, tx_bytes, operstate, rx_dropped, rx_errors, tx_dropped, tx_errors);
            }
            resolve(result);
          });
        }
        if (_darwin) {
          cmd = 'ifconfig ' + ifaceSanitized + ' | grep "status"';    // lgtm [js/shell-command-constructed-from-input]
          exec(cmd, function (error, stdout) {
            result.operstate = (stdout.toString().split(':')[1] || '').trim();
            result.operstate = (result.operstate || '').toLowerCase();
            result.operstate = (result.operstate === 'active' ? 'up' : (result.operstate === 'inactive' ? 'down' : 'unknown'));
            cmd = 'netstat -bdI ' + ifaceSanitized;   // lgtm [js/shell-command-constructed-from-input]
            exec(cmd, function (error, stdout) {
              if (!error) {
                lines = stdout.toString().split('\n');
                // if there is less than 2 lines, no information for this interface was found
                if (lines.length > 1 && lines[1].trim() !== '') {
                  // skip header line
                  // use the second line because it is tied to the NIC instead of the ipv4 or ipv6 address
                  stats = lines[1].replace(/ +/g, ' ').split(' ');
                  const offset = stats.length > 11 ? 1 : 0;
                  rx_bytes = parseInt(stats[offset + 5]);
                  rx_dropped = parseInt(stats[offset + 10]);
                  rx_errors = parseInt(stats[offset + 4]);
                  tx_bytes = parseInt(stats[offset + 8]);
                  tx_dropped = parseInt(stats[offset + 10]);
                  tx_errors = parseInt(stats[offset + 7]);
                  result = calcNetworkSpeed(ifaceSanitized, rx_bytes, tx_bytes, result.operstate, rx_dropped, rx_errors, tx_dropped, tx_errors);
                }
              }
              resolve(result);
            });
          });
        }
        if (_windows) {
          let perfData = [];
          let ifaceName = ifaceSanitized;

// Performance Data
          util.wmic('path Win32_PerfRawData_Tcpip_NetworkInterface Get name,BytesReceivedPersec,BytesSentPersec,BytesTotalPersec,PacketsOutboundDiscarded,PacketsOutboundErrors,PacketsReceivedDiscarded,PacketsReceivedErrors /value').then((stdout, error) => {
            if (!error) {
              const psections = stdout.toString().split(/\n\s*\n/);
              perfData = parseLinesWindowsPerfData(psections);
            }

// Network Interfaces
            networkInterfaces(false).then(interfaces => {
              // get bytes sent, received from perfData by name
              rx_bytes = 0;
              tx_bytes = 0;
              perfData.forEach(detail => {
                interfaces.forEach(det => {
                  if ((det.iface.toLowerCase() === ifaceSanitized.toLowerCase() ||
                    det.mac.toLowerCase() === ifaceSanitized.toLowerCase() ||
                    det.ip4.toLowerCase() === ifaceSanitized.toLowerCase() ||
                    det.ip6.toLowerCase() === ifaceSanitized.toLowerCase() ||
                    det.ifaceName.replace(/[()[\] ]+/g, '').replace('#', '_').toLowerCase() === ifaceSanitized.replace(/[()[\] ]+/g, '').replace('#', '_').toLowerCase()) &&
                    (det.ifaceName.replace(/[()[\] ]+/g, '').replace('#', '_').toLowerCase() === detail.name)) {
                    ifaceName = det.iface;
                    rx_bytes = detail.rx_bytes;
                    rx_dropped = detail.rx_dropped;
                    rx_errors = detail.rx_errors;
                    tx_bytes = detail.tx_bytes;
                    tx_dropped = detail.tx_dropped;
                    tx_errors = detail.tx_errors;
                    operstate = det.operstate;
                  }
                });
              });
              if (rx_bytes && tx_bytes) {
                result = calcNetworkSpeed(ifaceName, parseInt(rx_bytes), parseInt(tx_bytes), operstate, rx_dropped, rx_errors, tx_dropped, tx_errors);
              }
              resolve(result);
            });
          });
        }
      } else {
        result.rx_bytes = _network[ifaceSanitized].rx_bytes;
        result.tx_bytes = _network[ifaceSanitized].tx_bytes;
        result.rx_sec = _network[ifaceSanitized].rx_sec;
        result.tx_sec = _network[ifaceSanitized].tx_sec;
        result.ms = _network[ifaceSanitized].last_ms;
        result.operstate = _network[ifaceSanitized].operstate;
        resolve(result);
      }
    });
  });
}

exports.networkStats = networkStats;

// --------------------------
// NET - connections (sockets)

function networkConnections(callback) {

return new Promise((resolve) => {
    process.nextTick(() => {
      let result = [];
      if (_linux || _freebsd || _openbsd || _netbsd) {
        let cmd = 'export LC_ALL=C; netstat -tunap | grep "ESTABLISHED\\|SYN_SENT\\|SYN_RECV\\|FIN_WAIT1\\|FIN_WAIT2\\|TIME_WAIT\\|CLOSE\\|CLOSE_WAIT\\|LAST_ACK\\|LISTEN\\|CLOSING\\|UNKNOWN"; unset LC_ALL';
        if (_freebsd || _openbsd || _netbsd) { cmd = 'export LC_ALL=C; netstat -na | grep "ESTABLISHED\\|SYN_SENT\\|SYN_RECV\\|FIN_WAIT1\\|FIN_WAIT2\\|TIME_WAIT\\|CLOSE\\|CLOSE_WAIT\\|LAST_ACK\\|LISTEN\\|CLOSING\\|UNKNOWN"; unset LC_ALL'; }
        exec(cmd, { maxBuffer: 1024 * 20000 }, function (error, stdout) {
          let lines = stdout.toString().split('\n');
          if (!error && (lines.length > 1 || lines[0] != '')) {
            lines.forEach(function (line) {
              line = line.replace(/ +/g, ' ').split(' ');
              if (line.length >= 7) {
                let localip = line[3];
                let localport = '';
                let localaddress = line[3].split(':');
                if (localaddress.length > 1) {
                  localport = localaddress[localaddress.length - 1];
                  localaddress.pop();
                  localip = localaddress.join(':');
                }
                let peerip = line[4];
                let peerport = '';
                let peeraddress = line[4].split(':');
                if (peeraddress.length > 1) {
                  peerport = peeraddress[peeraddress.length - 1];
                  peeraddress.pop();
                  peerip = peeraddress.join(':');
                }
                let connstate = line[5];
                // if (connstate === 'VERBUNDEN') connstate = 'ESTABLISHED';
                let proc = line[6].split('/');

if (connstate) {
                  result.push({
                    protocol: line[0],
                    localAddress: localip,
                    localPort: localport,
                    peerAddress: peerip,
                    peerPort: peerport,
                    state: connstate,
                    pid: proc[0] && proc[0] !== '-' ? parseInt(proc[0], 10) : null,
                    process: proc[1] ? proc[1].split(' ')[0] : ''
                  });
                }
              }
            });
            if (callback) {
              callback(result);
            }
            resolve(result);
          } else {
            cmd = 'ss -tunap | grep "ESTAB\\|SYN-SENT\\|SYN-RECV\\|FIN-WAIT1\\|FIN-WAIT2\\|TIME-WAIT\\|CLOSE\\|CLOSE-WAIT\\|LAST-ACK\\|LISTEN\\|CLOSING"';
            exec(cmd, { maxBuffer: 1024 * 20000 }, function (error, stdout) {

if (!error) {
                let lines = stdout.toString().split('\n');
                lines.forEach(function (line) {
                  line = line.replace(/ +/g, ' ').split(' ');
                  if (line.length >= 6) {
                    let localip = line[4];
                    let localport = '';
                    let localaddress = line[4].split(':');
                    if (localaddress.length > 1) {
                      localport = localaddress[localaddress.length - 1];
                      localaddress.pop();
                      localip = localaddress.join(':');
                    }
                    let peerip = line[5];
                    let peerport = '';
                    let peeraddress = line[5].split(':');
                    if (peeraddress.length > 1) {
                      peerport = peeraddress[peeraddress.length - 1];
                      peeraddress.pop();
                      peerip = peeraddress.join(':');
                    }
                    let connstate = line[1];
                    if (connstate === 'ESTAB') { connstate = 'ESTABLISHED'; }
                    if (connstate === 'TIME-WAIT') { connstate = 'TIME_WAIT'; }
                    let pid = null;
                    let process = '';
                    if (line.length >= 7 && line[6].indexOf('users:') > -1) {
                      let proc = line[6].replace('users:(("', '').replace(/"/g, '').split(',');
                      if (proc.length > 2) {
                        process = proc[0].split(' ')[0];
                        pid = parseInt(proc[1], 10);
                      }
                    }
                    if (connstate) {
                      result.push({
                        protocol: line[0],
                        localAddress: localip,
                        localPort: localport,
                        peerAddress: peerip,
                        peerPort: peerport,
                        state: connstate,
                        pid,
                        process
                      });
                    }
                  }
                });
              }
              if (callback) {
                callback(result);
              }
              resolve(result);
            });
          }
        });
      }
      if (_darwin) {
        let cmd = 'netstat -natv | grep "ESTABLISHED\\|SYN_SENT\\|SYN_RECV\\|FIN_WAIT1\\|FIN_WAIT2\\|TIME_WAIT\\|CLOSE\\|CLOSE_WAIT\\|LAST_ACK\\|LISTEN\\|CLOSING\\|UNKNOWN"';
        exec(cmd, { maxBuffer: 1024 * 20000 }, function (error, stdout) {
          if (!error) {

let lines = stdout.toString().split('\n');

lines.forEach(function (line) {
              line = line.replace(/ +/g, ' ').split(' ');
              if (line.length >= 8) {
                let localip = line[3];
                let localport = '';
                let localaddress = line[3].split('.');
                if (localaddress.length > 1) {
                  localport = localaddress[localaddress.length - 1];
                  localaddress.pop();
                  localip = localaddress.join('.');
                }
                let peerip = line[4];
                let peerport = '';
                let peeraddress = line[4].split('.');
                if (peeraddress.length > 1) {
                  peerport = peeraddress[peeraddress.length - 1];
                  peeraddress.pop();
                  peerip = peeraddress.join('.');
                }
                let connstate = line[5];
                let pid = parseInt(line[8], 10);
                if (connstate) {
                  result.push({
                    protocol: line[0],
                    localAddress: localip,
                    localPort: localport,
                    peerAddress: peerip,
                    peerPort: peerport,
                    state: connstate,
                    pid: pid,
                    process: ''
                  });
                }
              }
            });
            if (callback) {
              callback(result);
            }
            resolve(result);
          }
        });
      }
      if (_windows) {
        let cmd = 'netstat -nao';
        try {
          exec(cmd, util.execOptsWin, function (error, stdout) {
            if (!error) {

let lines = stdout.toString().split('\r\n');

lines.forEach(function (line) {
                line = line.trim().replace(/ +/g, ' ').split(' ');
                if (line.length >= 4) {
                  let localip = line[1];
                  let localport = '';
                  let localaddress = line[1].split(':');
                  if (localaddress.length > 1) {
                    localport = localaddress[localaddress.length - 1];
                    localaddress.pop();
                    localip = localaddress.join(':');
                  }
                  let peerip = line[2];
                  let peerport = '';
                  let peeraddress = line[2].split(':');
                  if (peeraddress.length > 1) {
                    peerport = peeraddress[peeraddress.length - 1];
                    peeraddress.pop();
                    peerip = peeraddress.join(':');
                  }
                  let pid = line[4];
                  let connstate = line[3];
                  if (connstate === 'HERGESTELLT') { connstate = 'ESTABLISHED'; }
                  if (connstate.startsWith('ABH')) { connstate = 'LISTEN'; }
                  if (connstate === 'SCHLIESSEN_WARTEN') { connstate = 'CLOSE_WAIT'; }
                  if (connstate === 'WARTEND') { connstate = 'TIME_WAIT'; }
                  if (connstate === 'SYN_GESENDET') { connstate = 'SYN_SENT'; }

if (connstate === 'LISTENING') { connstate = 'LISTEN'; }
                  if (connstate === 'SYN_RECEIVED') { connstate = 'SYN_RECV'; }
                  if (connstate === 'FIN_WAIT_1') { connstate = 'FIN_WAIT1'; }
                  if (connstate === 'FIN_WAIT_2') { connstate = 'FIN_WAIT2'; }
                  if (connstate) {
                    result.push({
                      protocol: line[0].toLowerCase(),
                      localAddress: localip,
                      localPort: localport,
                      peerAddress: peerip,
                      peerPort: peerport,
                      state: connstate,
                      pid,
                      process: ''
                    });
                  }
                }
              });
              if (callback) {
                callback(result);
              }
              resolve(result);
            }
          });
        } catch (e) {
          if (callback) { callback(result); }
          resolve(result);
        }
      }
    });
  });
}

exports.networkConnections = networkConnections;

function networkGatewayDefault(callback) {

return new Promise((resolve) => {
    process.nextTick(() => {
      let result = '';
      if (_linux || _freebsd || _openbsd || _netbsd) {
        let cmd = 'ip route get 1';
        try {
          exec(cmd, { maxBuffer: 1024 * 20000 }, function (error, stdout) {
            if (!error) {
              let lines = stdout.toString().split('\n');
              const line = lines && lines[0] ? lines[0] : '';
              let parts = line.split(' via ');
              if (parts && parts[1]) {
                parts = parts[1].split(' ');
                result = parts[0];
              }
              if (callback) {
                callback(result);
              }
              resolve(result);
            } else {
              if (callback) {
                callback(result);
              }
              resolve(result);
            }
          });
        } catch (e) {
          if (callback) { callback(result); }
          resolve(result);
        }
      }
      if (_darwin) {
        let cmd = 'route -n get default';
        try {
          exec(cmd, { maxBuffer: 1024 * 20000 }, function (error, stdout) {
            if (!error) {
              let lines = stdout.toString().split('\n').map(line => line.trim());
              result = util.getValue(lines, 'gateway');
              if (callback) {
                callback(result);
              }
              resolve(result);
            } else {
              if (callback) {
                callback(result);
              }
              resolve(result);
            }
          });
        } catch (e) {
          if (callback) { callback(result); }
          resolve(result);
        }
      }
      if (_windows) {
        try {
          exec('netstat -r', util.execOptsWin, function (error, stdout) {
            const lines = stdout.toString().split(os.EOL);
            lines.forEach(line => {
              line = line.replace(/\s+/g, ' ').trim();
              if (line.indexOf('0.0.0.0 0.0.0.0') > -1 && !(/[a-zA-Z]/.test(line))) {
                const parts = line.split(' ');
                if (parts.length >= 5 && (parts[parts.length - 3]).indexOf('.') > -1) {
                  result = parts[parts.length - 3];
                }
              }
            });
            if (!result) {
              util.powerShell('Get-CimInstance -ClassName Win32_IP4RouteTable | Where-Object { $_.Destination -eq \'0.0.0.0\' -and $_.Mask -eq \'0.0.0.0\' }')
                .then(data => {
                  let lines = data.toString().split('\r\n');
                  if (lines.length > 1 && !result) {
                    result = util.getValue(lines, 'NextHop');
                    if (callback) {
                      callback(result);
                    }
                    resolve(result);
                    // } else {
                    //   exec('ipconfig', util.execOptsWin, function (error, stdout) {
                    //     let lines = stdout.toString().split('\r\n');
                    //     lines.forEach(function (line) {
                    //       line = line.trim().replace(/\. /g, '');
                    //       line = line.trim().replace(/ +/g, '');
                    //       const parts = line.split(':');
                    //       if ((parts[0].toLowerCase().startsWith('standardgate') || parts[0].toLowerCase().indexOf('gateway') > -1 || parts[0].toLowerCase().indexOf('enlace') > -1) && parts[1]) {
                    //         result = parts[1];
                    //       }
                    //     });
                    //     if (callback) { callback(result); }
                    //     resolve(result);
                    //   });
                  }
                });
            } else {
              if (callback) {
                callback(result);
              }
              resolve(result);
            }
          });
        } catch (e) {
          if (callback) { callback(result); }
          resolve(result);
        }
      }
    });
  });
}

exports.networkGatewayDefault = networkGatewayDefault;

MR SKB