net: port isIPv6 to JS

Porting isIPv6() to JS makes it 10%-250% faster in most cases and
reduces some C++ code. This change also adds tests for some edge
cases.

PR-URL: https://github.com/nodejs/node/pull/22673
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Roman Reiss <me@silverwind.io>

1 files changed, 46 insertions, 0 deletions

diff --git a/test/parallel/test-net-isipv4.js b/test/parallel/test-net-isipv4.js
new file mode 100644
index 0000000000..ec04505ced
--- /dev/null
+++ b/test/parallel/test-net-isipv4.js
@@ -0,0 +1,46 @@
+'use strict';
+require('../common');
+const assert = require('assert');
+const net = require('net');
+
+const v4 = [
+  '0.0.0.0',
+  '8.8.8.8',
+  '127.0.0.1',
+  '100.100.100.100',
+  '192.168.0.1',
+  '18.101.25.153',
+  '123.23.34.2',
+  '172.26.168.134',
+  '212.58.241.131',
+  '128.0.0.0',
+  '23.71.254.72',
+  '223.255.255.255',
+  '192.0.2.235',
+  '99.198.122.146',
+  '46.51.197.88',
+  '173.194.34.134'
+];
+
+const v4not = [
+  '.100.100.100.100',
+  '100..100.100.100.',
+  '100.100.100.100.',
+  '999.999.999.999',
+  '256.256.256.256',
+  '256.100.100.100.100',
+  '123.123.123',
+  'http://123.123.123',
+  '1000.2.3.4',
+  '999.2.3.4',
+  '0000000192.168.0.200',
+  '192.168.0.2000000000'
+];
+
+v4.forEach((ip) => {
+  assert.strictEqual(net.isIPv4(ip), true);
+});
+
+v4not.forEach((ip) => {
+  assert.strictEqual(net.isIPv4(ip), false);
+});