private static void GetCloudOrClouds(string cloudName, bool bGlobalCloudOnly, out CloudCollection clouds, out Cloud cloud)
{
cloud = null;
clouds = null;
Logging.Enter(Logging.P2PTraceSource, "Cloud::GetCloudOrClouds()");
//-------------------------------------------------
//Demand for the Unrestricted Pnrp Permission
//-------------------------------------------------
PnrpPermission.UnrestrictedPnrpPermission.Demand();
Int32 result = 0;
UInt32 numClouds = 0;
SafePeerData ArrayOfCloudInfoStructures = null;
if (cloudName == null)
{
//-----------------------------------------
//We need the collection only when we are not
//getting a specific cloud
//-----------------------------------------
clouds = new CloudCollection();
}
try
{
//---------------------------------------------------------------
//No perf hit here, real native call happens only one time if it
//did not already happen
//---------------------------------------------------------------
UnsafeP2PNativeMethods.PnrpStartup();
result = UnsafeP2PNativeMethods.PeerPnrpGetCloudInfo(out numClouds, out ArrayOfCloudInfoStructures);
if (result != 0)
{
throw PeerToPeerException.CreateFromHr(SR.GetString(SR.Pnrp_CouldNotEnumerateClouds), result);
}
if (numClouds != 0)
{
Logging.P2PTraceSource.TraceEvent(TraceEventType.Information, 0, "Number of clouds returned {0}", numClouds);
IntPtr pPEER_PNRP_CLOUD_INFO = ArrayOfCloudInfoStructures.DangerousGetHandle();
for (ulong i = 0; i < numClouds; i++)
{
PEER_PNRP_CLOUD_INFO cloudinfo = (PEER_PNRP_CLOUD_INFO)Marshal.PtrToStructure(pPEER_PNRP_CLOUD_INFO, typeof(PEER_PNRP_CLOUD_INFO));
string nativeCloudName = Marshal.PtrToStringUni(cloudinfo.pwzCloudName);
pPEER_PNRP_CLOUD_INFO = (IntPtr)((long)pPEER_PNRP_CLOUD_INFO + Marshal.SizeOf(typeof(PEER_PNRP_CLOUD_INFO)));
Cloud c = new Cloud(nativeCloudName, (PnrpScope)((int)cloudinfo.dwScope), (int)cloudinfo.dwScopeId);
if (cloudName == null && !bGlobalCloudOnly)
{
clouds.Add(c);
continue;
}
//If a specific cloud by name is required, then test for name
//note that scope is PnrpScope.All but we don't test that now
if (cloudName != null && cloudName == nativeCloudName)
{
cloud = c;
break;
}
if (bGlobalCloudOnly && c.Scope == PnrpScope.Global)
{
cloud = c;
break;
}
}
}
else
{
Logging.P2PTraceSource.TraceEvent(TraceEventType.Warning, 0, "No Clouds returned from the native call");
}
}
finally
{
if (ArrayOfCloudInfoStructures != null)
{
ArrayOfCloudInfoStructures.Dispose();
}
}
if (cloudName != null && cloud == null)
{
Logging.P2PTraceSource.TraceEvent(TraceEventType.Information, 0, "The specific cloud name {0} asked for is not found", cloudName);
}
Logging.Leave(Logging.P2PTraceSource, "Cloud::GetCloudOrClouds()");
}