41 lines
999 B
JavaScript
41 lines
999 B
JavaScript
'use strict';
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const defaultGateway = require('default-gateway');
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const {networkInterfaces} = require('os');
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const {parse, parseCIDR} = require('ipaddr.js');
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function findIp(gateway) {
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const gatewayIp = parse(gateway);
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// Look for the matching interface in all local interfaces.
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for (const addresses of Object.values(networkInterfaces())) {
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for (const {cidr} of addresses) {
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const net = parseCIDR(cidr);
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if (net[0] && net[0].kind() === gatewayIp.kind() && gatewayIp.match(net)) {
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return net[0].toString();
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}
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}
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}
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}
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async function promise(family) {
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try {
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const {gateway} = await defaultGateway[family]();
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return findIp(gateway);
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} catch {}
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}
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function sync(family) {
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try {
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const {gateway} = defaultGateway[family].sync();
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return findIp(gateway);
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} catch {}
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}
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const internalIp = {};
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internalIp.v6 = () => promise('v6');
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internalIp.v4 = () => promise('v4');
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internalIp.v6.sync = () => sync('v6');
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internalIp.v4.sync = () => sync('v4');
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module.exports = internalIp;
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