# IOBluetooth Functions ## Topics ### Functions [`func IOBluetoothNSStringFromDeviceAddressColon(UnsafePointer!) -> String!`](/documentation/IOBluetooth/IOBluetoothNSStringFromDeviceAddressColon(_:)) [`func IOBluetoothPackDataList(UnsafeMutableRawPointer!, UnsafePointer!, CVaListPointer) -> Int`](/documentation/IOBluetooth/IOBluetoothPackDataList(_:_:_:)) [`func IOBluetoothUnpackDataList(Int, UnsafeRawPointer!, UnsafePointer!, CVaListPointer) -> Int`](/documentation/IOBluetooth/IOBluetoothUnpackDataList(_:_:_:_:)) [`OBEXError OBEXSessionGetAvailableCommandPayloadLength(OBEXSessionRef inSessionRef, OBEXOpCode inOpCode, OBEXMaxPacketLength *outLength);`](/documentation/IOBluetooth/OBEXSessionGetAvailableCommandPayloadLength) Gets space available for your data for a particular command response you are trying to send. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)