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