Location:
bt_sock.h
const static TInt KHCIIoctlErrorBase
Supported from 6.1
HCI commands are accessed through RSocket::Ioctl(), which returns success (KErrNone) or an error code in its status word.
Error codes will be the error value from BS1 plus KHCIIoctlErrorBase. For example, if the return status from the HCI is 0x03 (Hardware failure) then the status word would be KHCIIoctlErrorBase+0x03.