feat(proxies): introduce nftables command executor and utilities, default certificate provider, expanded route/socket helper modules, and security improvements

ts/proxies/nftables-proxy/utils/index.ts

@@ -0,0 +1,38 @@
+/**
+ * NFTables Proxy Utilities
+ *
+ * This module exports utility functions and classes for NFTables operations.
+ */
+
+// Command execution
+export { NftCommandExecutor } from './nft-command-executor.js';
+export type { INftLoggerFn, INftExecutorOptions } from './nft-command-executor.js';
+
+// Port specification normalization
+export {
+  normalizePortSpec,
+  validatePorts,
+  formatPortRange,
+  portSpecToNftExpr,
+  rangesOverlap,
+  mergeOverlappingRanges,
+  countPorts,
+  isPortInSpec
+} from './nft-port-spec-normalizer.js';
+
+// Rule validation
+export {
+  isValidIP,
+  isValidIPv4,
+  isValidIPv6,
+  isValidHostname,
+  isValidTableName,
+  isValidRate,
+  validateIPs,
+  validateHost,
+  validateTableName,
+  validateQosSettings,
+  validateSettings,
+  isIPForFamily,
+  filterIPsByFamily
+} from './nft-rule-validator.js';