node/test/parallel/test-dgram-oob-buffer.js

// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

'use strict';
// Some operating systems report errors when an UDP message is sent to an
// unreachable host. This error can be reported by sendto() and even by
// recvfrom(). Node should not propagate this error to the user.

const common = require('../common');
const dgram = require('dgram');

const socket = dgram.createSocket('udp4');
const buf = Buffer.from([1, 2, 3, 4]);
const portGetter = dgram.createSocket('udp4')
  .bind(0, 'localhost', common.mustCall(() => {
    const { address, port } = portGetter.address();
    portGetter.close(common.mustCall(() => {
      socket.send(buf, 0, 0, port, address, common.mustNotCall());
      socket.send(buf, 0, 4, port, address, common.mustNotCall());
      socket.send(buf, 1, 3, port, address, common.mustNotCall());
      socket.send(buf, 3, 1, port, address, common.mustNotCall());
      // Since length of zero means nothing, don't error despite OOB.
      socket.send(buf, 4, 0, port, address, common.mustNotCall());

      socket.close();
    }));
  }));