---
title: availableSendBuffer
framework: network
role: symbol
role_heading: Instance Property
path: network/nwprotocoltcp/metadata/availablesendbuffer
---

# availableSendBuffer

The number of available bytes in the TCP send buffer.

## Declaration

```swift
var availableSendBuffer: UInt32 { get }
```

## See Also

### Inspecting TCP State

- [availableReceiveBuffer](network/nwprotocoltcp/metadata/availablereceivebuffer.md)