'use strict'; var os = require('os'); var fs = require('fs'); var child = require('child_process'); var DEFAULT_RESOLV_FILE = '/etc/resolv.conf'; function getInterfaceName() { var val = 'eth'; var platform = os.platform(); if (platform === 'darwin') { val = 'en'; } else if (platform === 'win32') { val = null; } return val; } function getIfconfigCMD() { if (os.platform() === 'win32') { return 'ipconfig/all'; } return '/sbin/ifconfig'; } // typeof os.networkInterfaces family is a number (v18.0.0) // types: 'IPv4' | 'IPv6' => 4 | 6 // @see https://github.com/nodejs/node/issues/42861 function matchName(actualFamily, expectedFamily) { if (expectedFamily === 'IPv4') { return actualFamily === 'IPv4' || actualFamily === 4; } if (expectedFamily === 'IPv6') { return actualFamily === 'IPv6' || actualFamily === 6; } return actualFamily === expectedFamily; } /** * Get all addresses. * * @param {String} [interfaceName] interface name, default is 'eth' on linux, 'en' on mac os. * @param {Function(err, addr)} callback * - {Object} addr { * - {String} ip * - {String} ipv6 * - {String} mac * } */ function address(interfaceName, callback) { if (typeof interfaceName === 'function') { callback = interfaceName; interfaceName = null; } var addr = { ip: address.ip(interfaceName), ipv6: address.ipv6(interfaceName), mac: null }; address.mac(interfaceName, function (err, mac) { if (mac) { addr.mac = mac; } callback(err, addr); }); } address.interface = function (family, name) { var interfaces = os.networkInterfaces(); var noName = !name; name = name || getInterfaceName(); family = family || 'IPv4'; for (var i = -1; i < 8; i++) { var interfaceName = name + (i >= 0 ? i : ''); // support 'lo' and 'lo0' var items = interfaces[interfaceName]; if (items) { for (var j = 0; j < items.length; j++) { var item = items[j]; if (matchName(item.family, family)) { return item; } } } } if (noName) { // filter all loopback or local addresses for (var k in interfaces) { var items = interfaces[k]; for (var i = 0; i < items.length; i++) { var item = items[i]; // all 127 addresses are local and should be ignored if (matchName(item.family, family) && !item.address.startsWith('127.')) { return item; } } } } return; }; /** * Get current machine IPv4 * * @param {String} [interfaceName] interface name, default is 'eth' on linux, 'en' on mac os. * @return {String} IP address */ address.ip = function (interfaceName) { var item = address.interface('IPv4', interfaceName); return item && item.address; }; /** * Get current machine IPv6 * * @param {String} [interfaceName] interface name, default is 'eth' on linux, 'en' on mac os. * @return {String} IP address */ address.ipv6 = function (interfaceName) { var item = address.interface('IPv6', interfaceName); return item && item.address; }; // osx start line 'en0: flags=8863 mtu 1500' // linux start line 'eth0 Link encap:Ethernet HWaddr 00:16:3E:00:0A:29 ' var MAC_OSX_START_LINE = /^(\w+)\:\s+flags=/; var MAC_LINUX_START_LINE = /^(\w+)\s{2,}link encap:\w+/i; // ether 78:ca:39:b0:e6:7d // HWaddr 00:16:3E:00:0A:29 var MAC_RE = address.MAC_RE = /(?:ether|HWaddr)\s+((?:[a-z0-9]{2}\:){5}[a-z0-9]{2})/i; // osx: inet 192.168.2.104 netmask 0xffffff00 broadcast 192.168.2.255 // linux: inet addr:10.125.5.202 Bcast:10.125.15.255 Mask:255.255.240.0 var MAC_IP_RE = address.MAC_IP_RE = /inet\s(?:addr\:)?(\d+\.\d+\.\d+\.\d+)/; function getMAC(content, interfaceName, matchIP) { var lines = content.split('\n'); for (var i = 0; i < lines.length; i++) { var line = lines[i].trimRight(); var m = MAC_OSX_START_LINE.exec(line) || MAC_LINUX_START_LINE.exec(line); if (!m) { continue; } // check interface name var name = m[1]; if (name.indexOf(interfaceName) !== 0) { continue; } var ip = null; var mac = null; var match = MAC_RE.exec(line); if (match) { mac = match[1]; } i++; while (true) { line = lines[i]; if (!line || MAC_OSX_START_LINE.exec(line) || MAC_LINUX_START_LINE.exec(line)) { i--; break; // hit next interface, handle next interface } if (!mac) { match = MAC_RE.exec(line); if (match) { mac = match[1]; } } if (!ip) { match = MAC_IP_RE.exec(line); if (match) { ip = match[1]; } } i++; } if (ip === matchIP) { return mac; } } } /** * Get current machine MAC address * * @param {String} [interfaceName] interface name, default is 'eth' on linux, 'en' on mac os. * @param {Function(err, address)} callback */ address.mac = function (interfaceName, callback) { if (typeof interfaceName === 'function') { callback = interfaceName; interfaceName = null; } interfaceName = interfaceName || getInterfaceName(); var item = address.interface('IPv4', interfaceName); if (!item) { return callback(); } // https://github.com/nodejs/node/issues/13581 // bug in node 7.x and <= 8.4.0 if (!process.env.CI && (item.mac === 'ff:00:00:00:00:00' || item.mac === '00:00:00:00:00:00')) { // wrong address, ignore it item.mac = ''; } if (item.mac) { return callback(null, item.mac); } child.exec(getIfconfigCMD(), {timeout: 5000}, function (err, stdout, stderr) { if (err || !stdout) { return callback(err); } var mac = getMAC(stdout || '', interfaceName, item.address); callback(null, mac); }); }; // nameserver 172.24.102.254 var DNS_SERVER_RE = /^nameserver\s+(\d+\.\d+\.\d+\.\d+)$/i; /** * Get DNS servers. * * @param {String} [filepath] resolv config file path. default is '/etc/resolv.conf'. * @param {Function(err, servers)} callback */ address.dns = function (filepath, callback) { if (typeof filepath === 'function') { callback = filepath; filepath = null; } filepath = filepath || DEFAULT_RESOLV_FILE; fs.readFile(filepath, 'utf8', function (err, content) { if (err) { return callback(err); } var servers = []; content = content || ''; var lines = content.split('\n'); for (var i = 0; i < lines.length; i++) { var line = lines[i].trim(); var m = DNS_SERVER_RE.exec(line); if (m) { servers.push(m[1]); } } callback(null, servers); }); }; module.exports = address;