unbound

Bindings to libunbound for node.js.

Usage

const Unbound = require('unbound');
const ub = new Unbound();

const KSK_2017 = '. 172800 IN DS 20326 8 2'
  + ' E06D44B80B8F1D39A95C0B0D7C65D08458E880409BBC683457104237C7F8EC8D';

ub.addTrustAnchor(KSK_2017);

const result = await ub.resolve('www.ietf.org');
console.log(result);

Outputs:

UnboundResult {
  qname: 'www.ietf.org.',
  qtype: 1,
  qclass: 1,
  data: [ <Buffer 68 14 01 55>, <Buffer 68 14 00 55> ],
  canonName: 'www.ietf.org.cdn.cloudflare.net.',
  rcode: 0,
  answerPacket: <Buffer 00 00 81 a0 ... 474 more bytes>,
  haveData: true,
  nxDomain: false,
  secure: true,
  bogus: false,
  whyBogus: null,
  wasRateLimited: false,
  ttl: 300 }

API

The API is a direct mapping to libunbound calls.

• Unbound.version() - Return unbound version string.
• Unbound#setOption(opt, val) - Set resolver option. Note that the trailing colon is not necessary. Values will be cast to strings (null='', bool='yes'/'no', num=num.toString(10)).
• Unbound#getOption(opt) - Get resolver option. Note that the trailing colon is not necessary. Return values will be cast to bools, numbers, and nulls where appropriate.
• Unbound#hasOption(opt) - Test whether an option is available.
• Unbound#tryOption(opt, val) - Try to set option if available.
• Unbound#setConfig(file) - Read unbound config file.
• Unbound#setForward(addr) - Set host to forward DNS queries to.
• Unbound#setStub(zone, addr, [prime=false]) - Setup stub zone.
• Unbound#setResolvConf(file) - Read from resolv.conf.
• Unbound#setHosts(file) - Read from an /etc/hosts file.
• Unbound#addTrustAnchor(ta) - Add a trust anchor (DS/DNSKEY presentation).
• Unbound#addTrustAnchorFile(file, [autr=false]) - Add trust anchor file. Set autr for auto-updating and reading.
• Unbound#addTrustedKeys(file) - Add bind-style trust anchors.
• Unbound#addZone(zoneName, zoneType) - Add a zone to the local authority info.
• Unbound#removeZone(zoneName) - Remove zone.
• Unbound#addData(data) - Add localdata to the local authority info.
• Unbound#removeData(data) - Remove data.
• Unbound#resolve(name, [type=A], [class=IN]) - Asynchronous recursive resolution (returns a Promise). type and class are raw qtypes and qclasses (no strings!). See above example for return value.

Contribution and License Agreement

If you contribute code to this project, you are implicitly allowing your code to be distributed under the MIT license. You are also implicitly verifying that all code is your original work. </legalese>

License

• Copyright (c) 2018-2020, Christopher Jeffrey (MIT License).

See LICENSE for more info.