feat: implement validateSubnet

fe-app-podkop/src/validators/index.ts

@@ -3,3 +3,4 @@ export * from './validateDomain';
 export * from './validateDns';
 export * from './validateUrl';
 export * from './validatePath';
+export * from './validateSubnet';

fe-app-podkop/src/validators/tests/validateSubnet.test.js

@@ -0,0 +1,41 @@
+import { describe, it, expect } from 'vitest';
+import { validateSubnet } from '../validateSubnet';
+
+export const validSubnets = [
+  ['Simple IP', '192.168.1.1'],
+  ['With CIDR /24', '192.168.1.1/24'],
+  ['CIDR /0', '10.0.0.1/0'],
+  ['CIDR /32', '172.16.0.1/32'],
+  ['Loopback', '127.0.0.1'],
+  ['Broadcast with mask', '255.255.255.255/32'],
+];
+
+export const invalidSubnets = [
+  ['Empty string', ''],
+  ['Bad format letters', 'abc.def.ghi.jkl'],
+  ['Octet too large', '300.1.1.1'],
+  ['Negative octet', '-1.2.3.4'],
+  ['Too many octets', '1.2.3.4.5'],
+  ['Not enough octets', '192.168.1'],
+  ['Leading zero octet', '01.2.3.4'],
+  ['Invalid CIDR (too high)', '192.168.1.1/33'],
+  ['Invalid CIDR (negative)', '192.168.1.1/-1'],
+  ['CIDR not number', '192.168.1.1/abc'],
+  ['Forbidden 0.0.0.0', '0.0.0.0'],
+];
+
+describe('validateSubnet', () => {
+  describe.each(validSubnets)('Valid subnet: %s', (_desc, subnet) => {
+    it(`returns {valid:true} for "${subnet}"`, () => {
+      const res = validateSubnet(subnet);
+      expect(res.valid).toBe(true);
+    });
+  });
+
+  describe.each(invalidSubnets)('Invalid subnet: %s', (_desc, subnet) => {
+    it(`returns {valid:false} for "${subnet}"`, () => {
+      const res = validateSubnet(subnet);
+      expect(res.valid).toBe(false);
+    });
+  });
+});

fe-app-podkop/src/validators/validateSubnet.ts

@@ -0,0 +1,39 @@
+import { ValidationResult } from './types.js';
+import { validateIPV4 } from './validateIp';
+
+export function validateSubnet(value: string): ValidationResult {
+  // Must be in form X.X.X.X or X.X.X.X/Y
+  const subnetRegex = /^(\d{1,3}\.){3}\d{1,3}(?:\/\d{1,2})?$/;
+
+  if (!subnetRegex.test(value)) {
+    return {
+      valid: false,
+      message: 'Invalid format. Use X.X.X.X or X.X.X.X/Y',
+    };
+  }
+
+  const [ip, cidr] = value.split('/');
+
+  if (ip === '0.0.0.0') {
+    return { valid: false, message: 'IP address 0.0.0.0 is not allowed' };
+  }
+
+  const ipCheck = validateIPV4(ip);
+  if (!ipCheck.valid) {
+    return ipCheck;
+  }
+
+  // Validate CIDR if present
+  if (cidr) {
+    const cidrNum = parseInt(cidr, 10);
+
+    if (cidrNum < 0 || cidrNum > 32) {
+      return {
+        valid: false,
+        message: 'CIDR must be between 0 and 32',
+      };
+    }
+  }
+
+  return { valid: true, message: 'Valid' };
+}