---
title: "getAvailableCommandPayloadLength(_:)"
framework: IOBluetooth
role: symbol
role_heading: Instance Method
path: "iobluetooth/obexsession/getavailablecommandpayloadlength(_:)"
---

# getAvailableCommandPayloadLength(_:)

Determine the maximum amount of data you can send in a particular command as an OBEX client session.

## Declaration

```swift
func getAvailableCommandPayloadLength(_ inOpCode: OBEXOpCode) -> OBEXMaxPacketLength
```

## Parameters

- `inOpCode`: The opcode you are interested in sending (as a client).

## Return Value

Return Value The maximum amount of data a particular packet can handle, after accounting for any command overhead.

## Discussion

Discussion Each OBEX Command has a certain amount of overhead. Since the negotiated max packet length does not indicate what the maximum data amount you can send in a particular command’s packet, you can use this function to determine how much data to provide in optional headers or body data headers.