Function createResolverPromise

lib/internal/dns/promises.js:310–336

(resolver, bindingName, hostname, ttl)

}

function createResolverPromise(resolver, bindingName, hostname, ttl) {
  return new Promise((resolve, reject) => {
    const req = new QueryReqWrap();

    req.bindingName = bindingName;
    req.hostname = hostname;
    req.oncomplete = onresolve;
    req.resolve = resolve;
    req.reject = reject;
    req.ttl = ttl;

    const err = resolver._handle[bindingName](req, hostname);

    if (err)
      reject(new DNSException(err, bindingName, hostname));
    else if (hasObserver('dns')) {
      startPerf(req, kPerfHooksDnsLookupResolveContext, {
        type: 'dns',
        name: bindingName,
        detail: {
          host: hostname,
          ttl,
        },
      });
    }
  });
}

function resolver(bindingName) {
  function query(name, options) {