1// Copyright Joyent, Inc. and other Node contributors.
2//
3// Permission is hereby granted, free of charge, to any person obtaining a
4// copy of this software and associated documentation files (the
5// "Software"), to deal in the Software without restriction, including
6// without limitation the rights to use, copy, modify, merge, publish,
7// distribute, sublicense, and/or sell copies of the Software, and to permit
8// persons to whom the Software is furnished to do so, subject to the
9// following conditions:
10//
11// The above copyright notice and this permission notice shall be included
12// in all copies or substantial portions of the Software.
13//
14// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
15// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
16// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
17// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
18// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
19// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
20// USE OR OTHER DEALINGS IN THE SOFTWARE.
21
22'use strict';
23const common = require('../common');
24const assert = require('assert');
25const cluster = require('cluster');
26const net = require('net');
27const { readFileSync } = require('fs');
28
29if (common.isLinux) {
30  try {
31    const unprivilegedPortStart = parseInt(readFileSync('/proc/sys/net/ipv4/ip_unprivileged_port_start'));
32    if (unprivilegedPortStart <= 42) {
33      common.skip('Port 42 is unprivileged');
34    }
35  } catch {
36    // Do nothing, feature doesn't exist, minimum is 1024 so 42 is usable.
37    // Continue...
38  }
39}
40
41// Skip on OS X Mojave. https://github.com/nodejs/node/issues/21679
42if (common.isOSX)
43  common.skip('macOS may allow ordinary processes to use any port');
44
45if (common.isIBMi)
46  common.skip('IBMi may allow ordinary processes to use any port');
47
48if (common.isWindows)
49  common.skip('not reliable on Windows.');
50
51if (process.getuid() === 0)
52  common.skip('Test is not supposed to be run as root.');
53
54if (cluster.isPrimary) {
55  cluster.fork().on('exit', common.mustCall((exitCode) => {
56    assert.strictEqual(exitCode, 0);
57  }));
58} else {
59  const s = net.createServer(common.mustNotCall());
60  s.listen(42, common.mustNotCall('listen should have failed'));
61  s.on('error', common.mustCall((err) => {
62    assert.strictEqual(err.code, 'EACCES');
63    process.disconnect();
64  }));
65}
66