.

qwen/nodejs/node_modules/validator/lib/isIPRange.js

@@ -0,0 +1,50 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = isIPRange;
+var _assertString = _interopRequireDefault(require("./util/assertString"));
+var _isIP = _interopRequireDefault(require("./isIP"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+var subnetMaybe = /^\d{1,3}$/;
+var v4Subnet = 32;
+var v6Subnet = 128;
+function isIPRange(str) {
+  var version = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : '';
+  (0, _assertString.default)(str);
+  var parts = str.split('/');
+
+  // parts[0] -> ip, parts[1] -> subnet
+  if (parts.length !== 2) {
+    return false;
+  }
+  if (!subnetMaybe.test(parts[1])) {
+    return false;
+  }
+
+  // Disallow preceding 0 i.e. 01, 02, ...
+  if (parts[1].length > 1 && parts[1].startsWith('0')) {
+    return false;
+  }
+  var isValidIP = (0, _isIP.default)(parts[0], version);
+  if (!isValidIP) {
+    return false;
+  }
+
+  // Define valid subnet according to IP's version
+  var expectedSubnet = null;
+  switch (String(version)) {
+    case '4':
+      expectedSubnet = v4Subnet;
+      break;
+    case '6':
+      expectedSubnet = v6Subnet;
+      break;
+    default:
+      expectedSubnet = (0, _isIP.default)(parts[0], '6') ? v6Subnet : v4Subnet;
+  }
+  return parts[1] <= expectedSubnet && parts[1] >= 0;
+}
+module.exports = exports.default;
+module.exports.default = exports.default;