feat(nftables):add nftables support for nftables

test/test.nftables-integration.simple.ts

@@ -0,0 +1,94 @@
+import { SmartProxy } from '../ts/proxies/smart-proxy/index.js';
+import { createNfTablesRoute, createNfTablesTerminateRoute } from '../ts/proxies/smart-proxy/utils/route-helpers.js';
+import { expect, tap } from '@push.rocks/tapbundle';
+import * as child_process from 'child_process';
+import { promisify } from 'util';
+
+const exec = promisify(child_process.exec);
+
+// Check if we have root privileges to run NFTables tests
+async function checkRootPrivileges(): Promise<boolean> {
+  try {
+    // Check if we're running as root
+    const { stdout } = await exec('id -u');
+    return stdout.trim() === '0';
+  } catch (err) {
+    return false;
+  }
+}
+
+// Check if tests should run
+const isRoot = await checkRootPrivileges();
+
+if (!isRoot) {
+  console.log('');
+  console.log('========================================');
+  console.log('NFTables tests require root privileges');
+  console.log('Skipping NFTables integration tests');
+  console.log('========================================');
+  console.log('');
+  process.exit(0);
+}
+
+tap.test('NFTables integration tests', async () => {
+  
+  console.log('Running NFTables tests with root privileges');
+  
+  // Create test routes
+  const routes = [
+    createNfTablesRoute('tcp-forward', {
+      host: 'localhost',
+      port: 8080
+    }, {
+      ports: 9080,
+      protocol: 'tcp'
+    }),
+    
+    createNfTablesRoute('udp-forward', {
+      host: 'localhost',
+      port: 5353
+    }, {
+      ports: 5354,
+      protocol: 'udp'
+    }),
+    
+    createNfTablesRoute('port-range', {
+      host: 'localhost',
+      port: 8080
+    }, {
+      ports: { from: 9000, to: 9100 },
+      protocol: 'tcp'
+    })
+  ];
+  
+  const smartProxy = new SmartProxy({
+    enableDetailedLogging: true,
+    routes
+  });
+  
+  // Start the proxy
+  await smartProxy.start();
+  console.log('SmartProxy started with NFTables routes');
+  
+  // Get NFTables status
+  const status = await smartProxy.getNfTablesStatus();
+  console.log('NFTables status:', JSON.stringify(status, null, 2));
+  
+  // Verify all routes are provisioned
+  expect(Object.keys(status).length).toEqual(routes.length);
+  
+  for (const routeStatus of Object.values(status)) {
+    expect(routeStatus.active).toBeTrue();
+    expect(routeStatus.ruleCount.total).toBeGreaterThan(0);
+  }
+  
+  // Stop the proxy
+  await smartProxy.stop();
+  console.log('SmartProxy stopped');
+  
+  // Verify all rules are cleaned up
+  const finalStatus = await smartProxy.getNfTablesStatus();
+  expect(Object.keys(finalStatus).length).toEqual(0);
+});
+
+export default tap.start();