65 lines
1.4 KiB
JavaScript
65 lines
1.4 KiB
JavaScript
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#!/usr/bin/env node
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var mdns = require('./')()
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var path = require('path')
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var os = require('os')
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var announcing = process.argv.indexOf('--announce') > -1
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if (process.argv.length < 3) {
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console.error('Usage: %s <hostname>', path.basename(process.argv[1]))
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process.exit(1)
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}
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var hostname = process.argv[2]
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if (announcing) {
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var ip = getIp()
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mdns.on('query', function (query, rinfo) {
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query.questions.forEach(function (q) {
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if (q.name === hostname) {
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console.log('Responding %s -> %s', q.name, ip)
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mdns.respond({
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answers: [{
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type: 'A',
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name: q.name,
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data: ip
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}]
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}, {port: rinfo.port})
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}
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})
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})
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} else {
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mdns.on('response', function (response) {
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response.answers.forEach(function (answer) {
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if (answer.name === hostname) {
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console.log(answer.data)
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process.exit()
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}
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})
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})
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mdns.query(hostname, 'A')
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// Give responses 3 seconds to respond
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setTimeout(function () {
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console.error('Hostname not found')
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process.exit(1)
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}, 3000)
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}
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function getIp () {
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var networks = os.networkInterfaces()
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var found = '127.0.0.1'
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Object.keys(networks).forEach(function (k) {
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var n = networks[k]
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n.forEach(function (addr) {
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if (addr.family === 'IPv4' && !addr.internal) {
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found = addr.address
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}
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})
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})
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return found
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}
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