| 'use strict'; |
| const os = require('os'); |
| const defaultGateway = require('default-gateway'); |
| const ipaddr = require('ipaddr.js'); |
| |
| function findIp(gateway) { |
| const interfaces = os.networkInterfaces(); |
| const gatewayIp = ipaddr.parse(gateway); |
| let ip; |
| |
| // Look for the matching interface in all local interfaces |
| Object.keys(interfaces).some(name => { |
| return interfaces[name].some(addr => { |
| const prefix = ipaddr.parse(addr.netmask).prefixLengthFromSubnetMask(); |
| const net = ipaddr.parseCIDR(`${addr.address}/${prefix}`); |
| |
| if (net[0] && net[0].kind() === gatewayIp.kind() && gatewayIp.match(net)) { |
| ip = net[0].toString(); |
| } |
| |
| return Boolean(ip); |
| }); |
| }); |
| |
| return ip; |
| } |
| |
| function promise(family) { |
| return defaultGateway[family]().then(result => { |
| return findIp(result.gateway) || null; |
| }).catch(() => null); |
| } |
| |
| function sync(family) { |
| try { |
| const result = defaultGateway[family].sync(); |
| return findIp(result.gateway) || null; |
| } catch (error) { |
| return null; |
| } |
| } |
| |
| const internalIp = {}; |
| internalIp.v6 = () => promise('v6'); |
| internalIp.v4 = () => promise('v4'); |
| internalIp.v6.sync = () => sync('v6'); |
| internalIp.v4.sync = () => sync('v4'); |
| |
| module.exports = internalIp; |
| // TODO: Remove this for the next major release |
| module.exports.default = internalIp; |