BREAKING CHANGE(smartproxy): Remove legacy migration utilities and deprecated forwarding helpers; consolidate route utilities, streamline interface definitions, and normalize IPv6-mapped IPv4 addresses

ts/common/port80-adapter.ts

@@ -21,9 +21,21 @@ export function convertToLegacyForwardConfig(
     ? forwardConfig.target.host[0]  // Use the first host in the array
     : forwardConfig.target.host;
 
+  // Extract port number, handling different port formats
+  let port: number;
+  if (typeof forwardConfig.target.port === 'function') {
+    // Use a default port for function-based ports in adapter context
+    port = 80;
+  } else if (forwardConfig.target.port === 'preserve') {
+    // For 'preserve', use the default port 80 in this adapter context
+    port = 80;
+  } else {
+    port = forwardConfig.target.port;
+  }
+
   return {
     ip: host,
-    port: forwardConfig.target.port
+    port: port
   };
 }
 
@@ -75,11 +87,23 @@ export function createPort80HandlerOptions(
       forwardConfig.type === 'https-terminate-to-https'));
   
   if (supportsHttp) {
+    // Determine port value handling different formats
+    let port: number;
+    if (typeof forwardConfig.target.port === 'function') {
+      // Use a default port for function-based ports
+      port = 80;
+    } else if (forwardConfig.target.port === 'preserve') {
+      // For 'preserve', use 80 in this adapter context
+      port = 80;
+    } else {
+      port = forwardConfig.target.port;
+    }
+
     options.forward = {
       ip: Array.isArray(forwardConfig.target.host) 
         ? forwardConfig.target.host[0]
         : forwardConfig.target.host,
-      port: forwardConfig.target.port
+      port: port
     };
   }