chushihua

node_modules/bonjour/lib/service.js

@@ -0,0 +1,98 @@
+'use strict'
+
+var os = require('os')
+var util = require('util')
+var EventEmitter = require('events').EventEmitter
+var serviceName = require('multicast-dns-service-types')
+var txt = require('dns-txt')()
+
+var TLD = '.local'
+
+module.exports = Service
+
+util.inherits(Service, EventEmitter)
+
+function Service (opts) {
+  if (!opts.name) throw new Error('Required name not given')
+  if (!opts.type) throw new Error('Required type not given')
+  if (!opts.port) throw new Error('Required port not given')
+
+  this.name = opts.name
+  this.protocol = opts.protocol || 'tcp'
+  this.type = serviceName.stringify(opts.type, this.protocol)
+  this.host = opts.host || os.hostname()
+  this.port = opts.port
+  this.fqdn = this.name + '.' + this.type + TLD
+  this.subtypes = opts.subtypes || null
+  this.txt = opts.txt || null
+  this.published = false
+
+  this._activated = false // indicates intent - true: starting/started, false: stopping/stopped
+}
+
+Service.prototype._records = function () {
+  var records = [rr_ptr(this), rr_srv(this), rr_txt(this)]
+
+  var self = this
+  var interfaces = os.networkInterfaces()
+  Object.keys(interfaces).forEach(function (name) {
+    interfaces[name].forEach(function (addr) {
+      if (addr.internal) return
+      if (addr.family === 'IPv4') {
+        records.push(rr_a(self, addr.address))
+      } else {
+        records.push(rr_aaaa(self, addr.address))
+      }
+    })
+  })
+
+  return records
+}
+
+function rr_ptr (service) {
+  return {
+    name: service.type + TLD,
+    type: 'PTR',
+    ttl: 28800,
+    data: service.fqdn
+  }
+}
+
+function rr_srv (service) {
+  return {
+    name: service.fqdn,
+    type: 'SRV',
+    ttl: 120,
+    data: {
+      port: service.port,
+      target: service.host
+    }
+  }
+}
+
+function rr_txt (service) {
+  return {
+    name: service.fqdn,
+    type: 'TXT',
+    ttl: 4500,
+    data: txt.encode(service.txt)
+  }
+}
+
+function rr_a (service, ip) {
+  return {
+    name: service.host,
+    type: 'A',
+    ttl: 120,
+    data: ip
+  }
+}
+
+function rr_aaaa (service, ip) {
+  return {
+    name: service.host,
+    type: 'AAAA',
+    ttl: 120,
+    data: ip
+  }
+}