getRFCOMMChannelID(_:)

Allows the discovery of the RFCOMM channel ID assigned to the service.

Declaration

func getRFCOMMChannelID(_ rfcommChannelID: UnsafeMutablePointer<BluetoothRFCOMMChannelID>!) -> IOReturn

Parameters

rfcommChannelID:
A pointer to the location that will get the found RFCOMM channel ID.

Return Value

Returns kIOReturnSuccess if the channel ID is found.

Discussion

This method will search through the ProtoclDescriptorList attribute to find an entry with the RFCOMM UUID (UUID16: 0x0003). If one is found, it gets the second element of the data element sequence and sets the rfcommChannelID pointer to it. The channel ID only gets set when kIOReturnSuccess is returned.