public IAsyncResult BeginServiceDiscovery(BluetoothAddress address, Guid serviceGuid, SdpSearchScope searchScope,
AsyncCallback asyncCallback, Object state)
{
BeginServiceDiscoveryKillInquiry();
// Just in case the user modifies the original address!!!
BluetoothAddress addr2 = (BluetoothAddress)address.Clone();
AsyncResult <ISdpDiscoveryRecordsBuffer, ServiceDiscoveryParams> ar
= new AsyncResult <ISdpDiscoveryRecordsBuffer, ServiceDiscoveryParams>(asyncCallback, state,
new ServiceDiscoveryParams(addr2, serviceGuid, searchScope));
lock (lockServiceDiscovery) {
if (m_arServiceDiscovery != null)
{
throw new NotSupportedException("Currently support only one concurrent Service Lookup operation.");
}
bool success = false;
try {
m_arServiceDiscovery = ar;
bool ret = m_btIf.StartDiscovery(addr2, serviceGuid);
Debug.WriteLine(WidcommUtils.GetTime4Log() + ": StartDiscovery ret: " + ret);
if (!ret)
{
WBtRc ee = GetExtendedError();
throw WidcommSocketExceptions.Create_StartDiscovery(ee);
}
success = true;
} finally {
if (!success)
{
m_arServiceDiscovery = null;
}
}
}
return(ar);
}
//--
#if !HIDE_WIDCOMM_WIDCOMM_EXCEPTIONS
internal static SocketException Create_StartDiscovery(WBtRc ee)
{
return(CommonSocketExceptions.Create_NoResultCode(CommonSocketExceptions.SocketError_StartDiscovery_Failed, "StartDiscoverySDP"
+ ((ee == unchecked ((WBtRc)(-1)) /*|| ee == WBtRc.WBT_SUCCESS*/) ? string.Empty
: string.Format(System.Globalization.CultureInfo.InvariantCulture, ", {0} = 0x{1:X}", ee, (uint)ee))));
}
