Try this

main.go

@@ -127,15 +127,16 @@ func main() {
 		pcapHandle.Close()
 		log.Fatalf("Couldn't set BPF filter on packet capture: %v", err)
 	}
-	defer pcapHandle.Close()
+	// defer pcapHandle.Close()
 
 	// Wait until all peer handlers have finished before closing the port
 	var handlersWG sync.WaitGroup
-	defer func() {
-		log.Print("Waiting for handlers to return...")
-		handlersWG.Wait()
-		ln.Close()
-	}()
+	defer handlersWG.Wait()
+	// defer func() {
+	// 	// log.Print("Waiting for handlers to return...")
+	// 	// handlersWG.Wait()
+	// 	// ln.Close()
+	// }()
 	goPeerHandler := func(p *router.Peer) {
 		handlersWG.Add(1)
 		go func() {
@@ -244,9 +245,9 @@ func main() {
 			}
 
 			rawPkt, _, err := pcapHandle.ReadPacketData()
-			if errors.Is(err, pcap.NextErrorTimeoutExpired) {
-				continue
-			}
+			// if errors.Is(err, pcap.NextErrorTimeoutExpired) {
+			// 	continue
+			// }
 			if errors.Is(err, io.EOF) || errors.Is(err, pcap.NextErrorNoMorePackets) {
 				return
 			}
@@ -357,18 +358,19 @@ func main() {
 	}()
 
 	// ----------------------------- AURP inbound -----------------------------
+	go func() {
 		for {
 			if ctx.Err() != nil {
 				return
 			}
-		ln.SetReadDeadline(time.Now().Add(100 * time.Millisecond))
+			// ln.SetReadDeadline(time.Now().Add(100 * time.Millisecond))
 			pktbuf := make([]byte, 4096)
 			pktlen, raddr, readErr := ln.ReadFromUDP(pktbuf)
 
-		var operr *net.OpError
-		if errors.As(readErr, &operr) && operr.Timeout() {
-			continue
-		}
+			// var operr *net.OpError
+			// if errors.As(readErr, &operr) && operr.Timeout() {
+			// 	continue
+			// }
 
 			// log.Printf("AURP: Received packet of length %d from %v", pktlen, raddr)
 
@@ -483,6 +485,7 @@ func main() {
 				log.Printf("AURP: Got unknown packet type %v", dh.PacketType)
 			}
 		}
+	}()
 }
 
 // Hashable net.UDPAddr