fix(PortProxy): Normalize IP addresses for port proxy to handle IPv4-mapped IPv6 addresses.

changelog.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## 2025-02-21 - 3.4.1 - fix(PortProxy)
+Normalize IP addresses for port proxy to handle IPv4-mapped IPv6 addresses.
+
+- Improved IP normalization logic in PortProxy to support IPv4-mapped IPv6 addresses.
+- Updated isAllowed function to expand patterns for better matching accuracy.
+
 ## 2025-02-21 - 3.4.0 - feat(PortProxy)
 Enhanced PortProxy with custom target host and improved testing
 

test/test.portproxy.ts

@@ -64,7 +64,7 @@ tap.test('setup port proxy test environment', async () => {
     toHost: 'localhost',
     domains: [],
     sniEnabled: false,
-    defaultAllowedIPs: ['127.0.0.1', '::ffff:127.0.0.1']
+    defaultAllowedIPs: ['127.0.0.1']
   });
 });
 
@@ -86,7 +86,7 @@ tap.test('should forward TCP connections to custom host', async () => {
     toHost: '127.0.0.1',
     domains: [],
     sniEnabled: false,
-    defaultAllowedIPs: ['127.0.0.1', '::ffff:127.0.0.1']
+    defaultAllowedIPs: ['127.0.0.1']
   });
   
   await customHostProxy.start();

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartproxy',
-  version: '3.4.0',
+  version: '3.4.1',
   description: 'a proxy for handling high workloads of proxying'
 }

ts/smartproxy.portproxy.ts

@@ -40,8 +40,26 @@ export class PortProxy {
       from.destroy();
       to.destroy();
     };
+    const normalizeIP = (ip: string): string[] => {
+      // Handle IPv4-mapped IPv6 addresses
+      if (ip.startsWith('::ffff:')) {
+        const ipv4 = ip.slice(7); // Remove '::ffff:' prefix
+        return [ip, ipv4];
+      }
+      // Handle IPv4 addresses by adding IPv4-mapped IPv6 variant
+      if (ip.match(/^\d{1,3}(\.\d{1,3}){3}$/)) {
+        return [ip, `::ffff:${ip}`];
+      }
+      return [ip];
+    };
+
     const isAllowed = (value: string, patterns: string[]): boolean => {
-      return patterns.some(pattern => plugins.minimatch(value, pattern));
+      // Expand patterns to include both IPv4 and IPv6 variants
+      const expandedPatterns = patterns.flatMap(normalizeIP);
+      // Check if any variant of the IP matches any expanded pattern
+      return normalizeIP(value).some(ip => 
+        expandedPatterns.some(pattern => plugins.minimatch(ip, pattern))
+      );
     };
 
     const findMatchingDomain = (serverName: string): DomainConfig | undefined => {
@@ -83,6 +101,7 @@ export class PortProxy {
           host: this.settings.toHost!,
           port: this.settings.toPort,
         });
+        console.log(`Connection established: ${remoteIP} -> ${this.settings.toHost}:${this.settings.toPort}${this.settings.sniEnabled ? ` (SNI: ${(from as any).servername || 'none'})` : ''}`);
         from.setTimeout(120000);
         from.pipe(to);
         to.pipe(from);