fix the server part

index.js

@@ -1,7 +1,7 @@
 import * as server from './server.js';
 
 console.log(server)
-server.default(
+server.recv(
 	(res) => {
 		console.log(`callback: ${res}`);
 	},

server.js

@@ -1,21 +1,36 @@
 import * as net from 'net';
 
 const hostname = '0.0.0.0';
-const port = 29997;
+const port = 29999;
 
-export default function recv(callback, errorCallback) {
+export function recv(callback, errorCallback) {
   let server = new net.Server();
   server.listen(port, hostname, () => {
-    server.on('connect', ()=>{
-      console.log('connection recieved')
-    })
-		server.on('data', (data) => {
-      callback(data)
-    })
+    server.on('connection', (con) => {
+      console.log('connection recieved: ' +
+        con.remoteAddress + ":" + con.remotePort);
+      con.on('data', (data) => {
+        callback(data);
       });
+      con.on('close', () => {
+        console.log('recieved close for ' +
+          con.remoteAddress + ":" + con.remotePort);
+        con.destroy();
+      });
+
+      server.getConnections((err, cons) => {
+        if (err) {
+          console.error(err);
+        }
+        else {
+          console.log(`connections: ${cons}`);
+        }
+      })
+    })
 
     server.on('error', (e) => {
       server.close();
       errorCallback(e);
     });
+  });
 }