Allow overriding node polyfills via `BUN_OVERRIDE_MODULE_PATH`

1 files changed, 61 insertions, 0 deletions

diff --git a/src/bun.js/net.exports.js b/src/bun.js/net.exports.js
new file mode 100644
index 000000000..ce70c3ee1
--- /dev/null
+++ b/src/bun.js/net.exports.js
@@ -0,0 +1,61 @@
+// 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.
+
+// IPv4 Segment
+const v4Seg = "(?:[0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])";
+const v4Str = `(${v4Seg}[.]){3}${v4Seg}`;
+const IPv4Reg = new RegExp(`^${v4Str}$`);
+
+// IPv6 Segment
+const v6Seg = "(?:[0-9a-fA-F]{1,4})";
+const IPv6Reg = new RegExp(
+  "^(" +
+    `(?:${v6Seg}:){7}(?:${v6Seg}|:)|` +
+    `(?:${v6Seg}:){6}(?:${v4Str}|:${v6Seg}|:)|` +
+    `(?:${v6Seg}:){5}(?::${v4Str}|(:${v6Seg}){1,2}|:)|` +
+    `(?:${v6Seg}:){4}(?:(:${v6Seg}){0,1}:${v4Str}|(:${v6Seg}){1,3}|:)|` +
+    `(?:${v6Seg}:){3}(?:(:${v6Seg}){0,2}:${v4Str}|(:${v6Seg}){1,4}|:)|` +
+    `(?:${v6Seg}:){2}(?:(:${v6Seg}){0,3}:${v4Str}|(:${v6Seg}){1,5}|:)|` +
+    `(?:${v6Seg}:){1}(?:(:${v6Seg}){0,4}:${v4Str}|(:${v6Seg}){1,6}|:)|` +
+    `(?::((?::${v6Seg}){0,5}:${v4Str}|(?::${v6Seg}){1,7}|:))` +
+    ")(%[0-9a-zA-Z-.:]{1,})?$"
+);
+
+export function isIPv4(s) {
+  return IPv4Reg.test(s);
+}
+
+export function isIPv6(s) {
+  return IPv6Reg.test(s);
+}
+
+export function isIP(s) {
+  if (isIPv4(s)) return 4;
+  if (isIPv6(s)) return 6;
+  return 0;
+}
+
+export default {
+  isIP,
+  isIPv4,
+  isIPv6,
+  [Symbol.for("CommonJS")]: 0,
+};