private static void RemoveService(IntPtr handle, byte[] sdpRecord)
{
BTHNS_SETBLOB blob = new BTHNS_SETBLOB(sdpRecord);
blob.Handle = handle;
WSAQUERYSET qs = new WSAQUERYSET();
qs.dwSize = WqsOffset.StructLength_60;
qs.dwNameSpace = WqsOffset.NsBth_16;
System.Diagnostics.Debug.Assert(Marshal.SizeOf(qs) == qs.dwSize, "WSAQUERYSET SizeOf == dwSize");
GCHandle hBlob = GCHandle.Alloc(blob.ToByteArray(), GCHandleType.Pinned);
BLOB b = new BLOB(blob.Length, GCHandleHelper.AddrOfPinnedObject(hBlob));
GCHandle hb = GCHandle.Alloc(b, GCHandleType.Pinned);
qs.lpBlob = hb.AddrOfPinnedObject();
try
{
int hresult = NativeMethods.WSASetService(ref qs, WSAESETSERVICEOP.RNRSERVICE_DELETE, 0);
BluetoothClient.ThrowSocketExceptionForHR(hresult);
}
finally
{
hb.Free();
hBlob.Free();
//release blob and associated GCHandles
blob.Dispose();
}
}
private static IntPtr SetService(byte[] sdpRecord, ServiceClass cod)
{
BTHNS_SETBLOB blob = new BTHNS_SETBLOB(sdpRecord);
//added for XP - adds class of device bits
#if WinXP
blob.CodService = (uint)cod;
#endif
WSAQUERYSET qs = new WSAQUERYSET();
qs.dwSize = WqsOffset.StructLength_60;
qs.dwNameSpace = WqsOffset.NsBth_16;
System.Diagnostics.Debug.Assert(Marshal.SizeOf(qs) == qs.dwSize, "WSAQUERYSET SizeOf == dwSize");
GCHandle hBlob = GCHandle.Alloc(blob.ToByteArray(), GCHandleType.Pinned);
BLOB b = new BLOB(blob.Length, GCHandleHelper.AddrOfPinnedObject(hBlob));
GCHandle hb = GCHandle.Alloc(b, GCHandleType.Pinned);
qs.lpBlob = hb.AddrOfPinnedObject();
try
{
int hresult = NativeMethods.WSASetService(ref qs, WSAESETSERVICEOP.RNRSERVICE_REGISTER, 0);
BluetoothClient.ThrowSocketExceptionForHR(hresult);
}
finally
{
hb.Free();
hBlob.Free();
}
IntPtr handle = blob.Handle;
blob.Dispose();
return handle;
}
/// <summary>
/// Discovers accessible Bluetooth devices and returns their names and addresses.
/// </summary>
/// <param name="maxDevices">The maximum number of devices to get information about.</param>
/// <param name="authenticated">True to return previously authenticated/paired devices.</param>
/// <param name="remembered">True to return remembered devices.</param>
/// <param name="unknown">True to return previously unknown devices.</param>
/// <returns>An array of BluetoothDeviceInfo objects describing the devices discovered.</returns>
public BluetoothDeviceInfo[] DiscoverDevices(int maxDevices, bool authenticated, bool remembered, bool unknown)
{
WqsOffset.AssertCheckLayout();
CsaddrInfoOffsets.AssertCheckLayout();
//
int discoveredDevices = 0;
ArrayList al = new ArrayList();
int handle = 0;
int lookupresult = 0;
#if WinCE
if(unknown)
{
#endif
byte[] buffer = new byte[1024];
BitConverter.GetBytes(WqsOffset.StructLength_60).CopyTo(buffer, WqsOffset.dwSize_0);
BitConverter.GetBytes(WqsOffset.NsBth_16).CopyTo(buffer, WqsOffset.dwNameSpace_20);
int bufferlen = buffer.Length;
BTHNS_INQUIRYBLOB bib = new BTHNS_INQUIRYBLOB();
bib.LAP = 0x9E8B33;
#if WinCE
bib.length = Convert.ToInt16(inquiryLength.TotalSeconds / 1.28);
bib.num_responses = Convert.ToInt16(maxDevices);
#else
bib.length = Convert.ToByte(inquiryLength.TotalSeconds);
#endif
GCHandle hBib = GCHandle.Alloc(bib, GCHandleType.Pinned);
IntPtr pBib = hBib.AddrOfPinnedObject();
BLOB b = new BLOB(8, pBib);
GCHandle hBlob = GCHandle.Alloc(b, GCHandleType.Pinned);
Marshal32.WriteIntPtr(buffer, WqsOffset.lpBlob_56, hBlob.AddrOfPinnedObject());
//start looking for Bluetooth devices
LookupFlags flags = LookupFlags.Containers;
#if WinXP
//ensure cache is cleared on XP when looking for new devices
if(unknown)
{
flags |= LookupFlags.FlushCache;
}
#endif
lookupresult = NativeMethods.WSALookupServiceBegin(buffer, flags, out handle);
hBlob.Free();
hBib.Free();
while(discoveredDevices < maxDevices && lookupresult != -1)
{
#if WinCE
lookupresult = NativeMethods.WSALookupServiceNext(handle, LookupFlags.ReturnAddr | LookupFlags.ReturnBlob , ref bufferlen, buffer);
#else
lookupresult = NativeMethods.WSALookupServiceNext(handle, LookupFlags.ReturnAddr , ref bufferlen, buffer);
#endif
if (lookupresult != -1)
{
//increment found count
discoveredDevices++;
//status
#if WinXP
BTHNS_RESULT status = (BTHNS_RESULT)BitConverter.ToInt32(buffer, WqsOffset.dwOutputFlags_52);
bool devAuthd = ((status & BTHNS_RESULT.Authenticated) == BTHNS_RESULT.Authenticated);
bool devRembd = ((status & BTHNS_RESULT.Remembered) == BTHNS_RESULT.Remembered);
if (devAuthd && !devRembd) {
System.Diagnostics.Debug.WriteLine("Win32 BT disco: Auth'd but NOT Remembered.");
}
bool devUnkwn = !devRembd && !devAuthd;
bool include = (authenticated && devAuthd) || (remembered && devRembd) || (unknown && devUnkwn);
if (include)
#else
if(true)
#endif
{
#if WinCE
IntPtr lpBlob = (IntPtr)BitConverter.ToInt32(buffer, 56);
BLOB ib = (BLOB)Marshal.PtrToStructure(lpBlob, typeof(BLOB));
BthInquiryResult bir = (BthInquiryResult)Marshal.PtrToStructure(ib.pBlobData, typeof(BthInquiryResult));
#endif
//struct CSADDR_INFO {
// SOCKET_ADDRESS LocalAddr;
// SOCKET_ADDRESS RemoteAddr;
// INT iSocketType;
// INT iProtocol;
//}
//struct SOCKET_ADDRESS {
// LPSOCKADDR lpSockaddr;
// INT iSockaddrLength;
//}
//pointer to outputbuffer
IntPtr bufferptr = Marshal32.ReadIntPtr(buffer, WqsOffset.lpcsaBuffer_48);
//remote socket address
IntPtr sockaddrptr = Marshal32.ReadIntPtr(bufferptr, CsaddrInfoOffsets.OffsetRemoteAddr_lpSockaddr_8);
//remote socket len
int sockaddrlen = Marshal.ReadInt32(bufferptr, CsaddrInfoOffsets.OffsetRemoteAddr_iSockaddrLength_12);
SocketAddress btsa = new SocketAddress(AddressFamily32.Bluetooth, sockaddrlen);
for(int sockbyte = 0; sockbyte < sockaddrlen; sockbyte++)
{
btsa[sockbyte] = Marshal.ReadByte(sockaddrptr, sockbyte);
}
BluetoothEndPoint bep = new BluetoothEndPoint(null, BluetoothService.Empty);
bep = (BluetoothEndPoint)bep.Create(btsa);
//new deviceinfo
BluetoothDeviceInfo newdevice;
#if WinCE
newdevice = new BluetoothDeviceInfo(bep.Address, bir.cod);
#else
newdevice = new BluetoothDeviceInfo(bep.Address);
#endif
//add to discovered list
al.Add(newdevice);
}
}
}
#if WinCE
}
#endif
//stop looking
if(handle!=0)
{
lookupresult = NativeMethods.WSALookupServiceEnd(handle);
}
#if WinCE
//open bluetooth device key
RegistryKey devkey = Registry.LocalMachine.OpenSubKey("Software\\Microsoft\\Bluetooth\\Device");
bool addFromRegistry = authenticated || remembered;
if (devkey != null)
{
//enumerate the keys
foreach (string devid in devkey.GetSubKeyNames())
{
BluetoothAddress address;
if (BluetoothAddress.TryParse(devid, out address))
{
//get friendly name
RegistryKey thisdevkey = devkey.OpenSubKey(devid);
string name = thisdevkey.GetValue("name", "").ToString();
uint classOfDevice = Convert.ToUInt32(thisdevkey.GetValue("class", 0));
thisdevkey.Close();
//add to collection
BluetoothDeviceInfo thisdevice = new BluetoothDeviceInfo(address, name, classOfDevice, true);
int devindex = al.IndexOf(thisdevice);
if (devindex == -1)
{
//if we intended to search for authenticated devices add this one to the collection
if (addFromRegistry)
{
al.Add(thisdevice);
}
}
else
{
if (addFromRegistry)
{
//set authenticated flag on existing discovered device
((BluetoothDeviceInfo)al[devindex]).Authenticated = true;
}
else
{
//we want to exclude already authenticated devices so remove it from the collection
al.RemoveAt(devindex);
}
}
}
}
devkey.Close();
}
#endif
//return results
if(al.Count == 0)
{
//special case for empty collection
return new BluetoothDeviceInfo[0]{};
}
return (BluetoothDeviceInfo[])al.ToArray(typeof(BluetoothDeviceInfo));
}
