tedious/lib/token/feature-ext-ack-parser.js

A TDS driver, for connecting to MS SQLServer databases.

"use strict";

const FEATURE_ID = {
  SESSIONRECOVERY: 0x01,
  FEDAUTH: 0x02,
  COLUMNENCRYPTION: 0x04,
  GLOBALTRANSACTIONS: 0x05,
  AZURESQLSUPPORT: 0x08,
  TERMINATOR: 0xFF
};

module.exports = function featureExtAckParser(parser, colMetadata, options, callback) {
  const token = {
    'name': 'FEATUREEXTACK',
    'event': 'featureExtAck',
    'fedAuth': undefined
  };

  function next(done) {
    parser.readUInt8(featureId => {
      if (featureId === FEATURE_ID.TERMINATOR) {
        return done();
      }

      parser.readUInt32LE(featureAckDataLen => {
        parser.readBuffer(featureAckDataLen, featureData => {
          if (featureId === FEATURE_ID.FEDAUTH) {
            token.fedAuth = featureData;
          }

          next(done);
        });
      });
    });
  }

  next(() => {
    callback(token);
  });
};