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rOACCT/node_modules/address/lib/address.js
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address.js
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'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<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> 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;
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