---
title: "retransmitFinDrop(_:)"
framework: network
role: symbol
role_heading: Instance Method
path: "network/tcp/retransmitfindrop(_:)"
---

# retransmitFinDrop(_:)

Configure TCP to drop the connection after a FIN does not receive an ACK.

## Declaration

```swift
func retransmitFinDrop(_ drop: Bool) -> TCP
```

## Parameters

- `drop`: True to drop, false otherwise.

## Discussion

Discussion A boolean to cause TCP to drop its connection after not receiving an ACK after a FIN (TCP_RXT_FINDROP).