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# Copyright (c) 2016, Maxim V. Abramov
# All rights reserved.
# Look at license.txt for more info.
## This module is used for discovery and managing Bluetooth devices and
## services. It is based on Microsoft Bluetooth protocol stack implementation
## for Windows.
import os, strutils, algorithm, sequtils, winlean
import msbt/ms_bluetoothapis, msbt/ms_bthsdpdef, msbt/ms_bthdef
export BLUETOOTH_ADDRESS, BLUETOOTH_RADIO_INFO, BLUETOOTH_DEVICE_INFO
const
ERROR_NO_MORE_ITEMS* = OSErrorCode(259)
type
BluetoothDeviceLocalImpl* = object of RootObj ## Local Bluetooth device -
## radio adapter.
fRadioInfo*: BLUETOOTH_RADIO_INFO
BluetoothDeviceLocal* = ref BluetoothDeviceLocalImpl ## Local Bluetooth
## device - radio
## adapter reference.
BluetoothDeviceRemoteImpl* = object of RootObj ## Remote Bluetooth device.
fDeviceInfo*: BLUETOOTH_DEVICE_INFO
BluetoothDeviceRemote* = ref BluetoothDeviceRemoteImpl ## Remote Bluetooth
## device reference.
proc CloseHandle(hObject: HANDLE): WINBOOL{.stdcall, dynlib: "kernel32",
importc: "CloseHandle".}
proc `$`*(ba: BLUETOOTH_ADDRESS): string =
## Returns Bluetooth device address as a string.
let ab = map(ba.ano_116103095.rgBytes,
proc(b: byte): string = toHex(BiggestInt(b), 2))
result = ab.reversed.join(":")
proc parseBluetoothAddress*(str: string): BLUETOOTH_ADDRESS =
## Converts a string to a Bluetooth device address.
var intVals = map(str.split(':'),
proc(s: string): int = parseHexInt(s)).reversed()
for i in 0..5:
result.ano_116103095.rgBytes[i] = byte(intVals[i])
proc `==`*(x, y: BLUETOOTH_ADDRESS): bool =
## Converts a string to a Bluetooth device address.
x.ano_116103095.ullLong == y.ano_116103095.ullLong
iterator localDeviceHandles*():
tuple[handle: int , info: BLUETOOTH_RADIO_INFO] {.inline.} =
## Iterates through the local Bluetooth devices. Closes current device
## ''handle'' at the end of the each iteration.
var
findRadioParams: BLUETOOTH_FIND_RADIO_PARAMS
findRadioHandle: HBLUETOOTH_RADIO_FIND
radioHandle: int
errorCode: OSErrorCode
findRadioParams.dwSize = DWORD(sizeof(findRadioParams))
try:
findRadioHandle = BluetoothFindFirstRadio(addr(findRadioParams),
addr(radioHandle))
if findRadioHandle == 0:
errorCode = osLastError()
if errorCode != ERROR_NO_MORE_ITEMS:
raiseOSError(errorCode)
else:
while true:
var radioInfo: BLUETOOTH_RADIO_INFO
radioInfo.dwSize = DWORD(sizeof(radioInfo))
errorCode = BluetoothGetRadioInfo(radioHandle, addr(radioInfo))
.OSErrorCode
if errorCode != OSErrorCode(NO_ERROR):
raiseOSError(errorCode)
yield (handle: radioHandle, info: radioInfo)
if CloseHandle(radioHandle) == 0:
raiseOSError(osLastError())
radioHandle = 0;
if BluetoothFindNextRadio(findRadioHandle, addr(radioHandle)) == 0:
errorCode = osLastError()
if errorCode != ERROR_NO_MORE_ITEMS:
raiseOSError(errorCode)
break
finally:
if findRadioHandle != 0:
if radioHandle != 0:
if CloseHandle(radioHandle) == 0:
raiseOSError(osLastError())
if BluetoothFindRadioClose(findRadioHandle) == 0:
raiseOSError(osLastError())
iterator getLocalDevices*(): BluetoothDeviceLocal {.inline.} =
## Returns all local Blutooth radio devices.
for item in localDeviceHandles():
yield BluetoothDeviceLocal(fRadioInfo: item.info)
proc getLocalDevice*(): BluetoothDeviceLocal =
## Returns default local Bluetooth radio device.
for item in getLocalDevices():
return item
raiseOSError(ERROR_NO_MORE_ITEMS)
proc getLocalDevice*(address: string): BluetoothDeviceLocal =
## Returns local Bluetooth radio device with a specified address.
let ba = parseBluetoothAddress(address)
for item in getLocalDevices():
if item.fRadioInfo.address == ba:
return item
raiseOSError(ERROR_NO_MORE_ITEMS)
proc getRemoteDevice*(address: string): BluetoothDeviceRemote =
## Returns remote Bluetooth device with a specified address.
new(result)
result.fDeviceInfo.Address = address.parseBluetoothAddress
iterator remoteDeviceInfos*(radioHandle: HANDLE;
timeoutMultiplier: UCHAR;
issueInquiry: BOOL):
BLUETOOTH_DEVICE_INFO {.inline.} =
## Iterates through the all remote Bluetooth devices visible for the
## specified local Bluetooth radio device.
var
deviceSearchParams: BLUETOOTH_DEVICE_SEARCH_PARAMS
deviceFindHandle: HBLUETOOTH_DEVICE_FIND
errorCode: OSErrorCode
deviceInfo: BLUETOOTH_DEVICE_INFO
deviceSearchParams.dwSize = DWORD(sizeof(deviceSearchParams))
deviceSearchParams.fReturnAuthenticated = BOOL(true)
deviceSearchParams.fReturnRemembered = BOOL(true)
deviceSearchParams.fReturnUnknown = BOOL(true)
deviceSearchParams.fReturnConnected = BOOL(true)
deviceSearchParams.fIssueInquiry = issueInquiry
deviceSearchParams.cTimeoutMultiplier = timeoutMultiplier
deviceSearchParams.hRadio = radioHandle
deviceInfo.dwSize = DWORD(sizeof(deviceInfo))
try:
deviceFindHandle = BluetoothFindFirstDevice(addr(deviceSearchParams),
addr(deviceInfo))
if deviceFindHandle == 0:
errorCode = osLastError()
if errorCode != ERROR_NO_MORE_ITEMS:
raiseOSError(errorCode)
else:
yield deviceInfo
while true:
var deviceInfoLoop: BLUETOOTH_DEVICE_INFO
deviceInfoLoop.dwSize = DWORD(sizeof(deviceInfoLoop))
if BluetoothFindNextDevice(deviceFindHandle, addr(deviceInfoLoop)) == 0:
errorCode = osLastError()
if errorCode != ERROR_NO_MORE_ITEMS:
raiseOSError(errorCode)
break
yield deviceInfoLoop
finally:
if deviceFindHandle != 0:
if BluetoothFindDeviceClose(deviceFindHandle) == 0:
raiseOSError(errorCode)
proc getRemoteDevices*(device: BluetoothDeviceLocal = nil;
duration: int = 8;
flushCache: bool = true): seq[BluetoothDeviceRemote] =
## Returns all remote Bluetooth devices visible for the specified or default
## local Bluetooth radio device.
result = @[]
if device != nil:
for item in localDeviceHandles():
if item.info.address == device.fRadioInfo.address:
for deviceInfo in remoteDeviceInfos(item.handle, UCHAR(duration),
BOOL(flushCache)):
result.add(BluetoothDeviceRemote(fDeviceInfo: deviceInfo))
else:
for deviceInfo in remoteDeviceInfos(0, UCHAR(duration), BOOL(flushCache)):
result.add(BluetoothDeviceRemote(fDeviceInfo: deviceInfo))
proc address*(device: BluetoothDeviceLocal): string =
## Returns local Bluetooth device address as a string.
$device.fRadioInfo.address
proc address*(device: BluetoothDeviceRemote): string =
## Returns remote Bluetooth device address as a string.
$device.fDeviceInfo.Address
proc name*(device: BluetoothDeviceLocal): string =
## Returns local Bluetooth device name.
var buf: array[BLUETOOTH_MAX_NAME_SIZE + 1, WCHAR]
copyMem(addr(buf), addr(device.fRadioInfo.szName), BLUETOOTH_MAX_NAME_SIZE)
return cast[WideCString](addr(buf)) $ BLUETOOTH_MAX_NAME_SIZE
proc name*(device: BluetoothDeviceRemote): string =
## Returns remote Bluetooth device name.
var buf: array[BLUETOOTH_MAX_NAME_SIZE + 1, WCHAR]
copyMem(addr(buf), addr(device.fDeviceInfo.szName), BLUETOOTH_MAX_NAME_SIZE)
return cast[WideCString](addr(buf)) $ BLUETOOTH_MAX_NAME_SIZE
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