Function lookupAndConnect

lib/net.js:1515–1656

(self, options)

}

function lookupAndConnect(self, options) {
  const { localAddress, localPort } = options;
  const host = options.host || 'localhost';
  let { port, autoSelectFamilyAttemptTimeout, autoSelectFamily } = options;

  validateStringWithoutNullBytes(host, 'options.host');

  // An adopted BoundSocket already owns the local endpoint and address family.
  if (self[kBoundSource]) {
    if (localAddress !== undefined || localPort !== undefined) {
      throw new ERR_INVALID_ARG_VALUE(
        'options',
        options,
        'localAddress and localPort cannot be used with an adopted bound socket');
    }
    autoSelectFamily = false;
  }

  if (localAddress && !isIP(localAddress)) {
    throw new ERR_INVALID_IP_ADDRESS(localAddress);
  }

  if (localPort) {
    validateNumber(localPort, 'options.localPort');
  }

  if (port !== undefined) {
    if (typeof port !== 'number' && typeof port !== 'string') {
      throw new ERR_INVALID_ARG_TYPE('options.port',
                                     ['number', 'string'], port);
    }
    validatePort(port);
  }
  port |= 0;


  if (autoSelectFamily != null) {
    validateBoolean(autoSelectFamily, 'options.autoSelectFamily');
  } else {
    autoSelectFamily = autoSelectFamilyDefault;
  }

  if (autoSelectFamilyAttemptTimeout != null) {
    validateInt32(autoSelectFamilyAttemptTimeout, 'options.autoSelectFamilyAttemptTimeout', 1);

    if (autoSelectFamilyAttemptTimeout < 10) {
      autoSelectFamilyAttemptTimeout = 10;
    }
  } else {
    autoSelectFamilyAttemptTimeout = autoSelectFamilyAttemptTimeoutDefault;
  }

  // If host is an IP, skip performing a lookup
  const addressType = isIP(host);
  if (addressType) {
    defaultTriggerAsyncIdScope(self[async_id_symbol], process.nextTick, () => {
      if (self.connecting)
        defaultTriggerAsyncIdScope(