public DirectoryControlCollection()
{
Utility.CheckOSVersion();
}
public SortKey()
{
Utility.CheckOSVersion();
}
public override byte[] GetValue()
{
IntPtr control = (IntPtr)0;
int structSize = Marshal.SizeOf(typeof(SortKey));
int keyCount = _keys.Length;
IntPtr memHandle = Utility.AllocHGlobalIntPtrArray(keyCount + 1);
try
{
IntPtr tempPtr = (IntPtr)0;
IntPtr sortPtr = (IntPtr)0;
int i = 0;
for (i = 0; i < keyCount; i++)
{
sortPtr = Marshal.AllocHGlobal(structSize);
Marshal.StructureToPtr(_keys[i], sortPtr, false);
tempPtr = (IntPtr)((long)memHandle + Marshal.SizeOf(typeof(IntPtr)) * i);
Marshal.WriteIntPtr(tempPtr, sortPtr);
}
tempPtr = (IntPtr)((long)memHandle + Marshal.SizeOf(typeof(IntPtr)) * i);
Marshal.WriteIntPtr(tempPtr, (IntPtr)0);
bool critical = IsCritical;
int error = Wldap32.ldap_create_sort_control(UtilityHandle.GetHandle(), memHandle, critical ? (byte)1 : (byte)0, ref control);
if (error != 0)
{
if (Utility.IsLdapError((LdapError)error))
{
string errorMessage = LdapErrorMappings.MapResultCode(error);
throw new LdapException(error, errorMessage);
}
else
throw new LdapException(error);
}
LdapControl managedControl = new LdapControl();
Marshal.PtrToStructure(control, managedControl);
berval value = managedControl.ldctl_value;
// reinitialize the value
directoryControlValue = null;
if (value != null)
{
directoryControlValue = new byte[value.bv_len];
Marshal.Copy(value.bv_val, directoryControlValue, 0, value.bv_len);
}
}
finally
{
if (control != (IntPtr)0)
Wldap32.ldap_control_free(control);
if (memHandle != (IntPtr)0)
{
//release the memory from the heap
for (int i = 0; i < keyCount; i++)
{
IntPtr tempPtr = Marshal.ReadIntPtr(memHandle, Marshal.SizeOf(typeof(IntPtr)) * i);
if (tempPtr != (IntPtr)0)
{
// free the marshalled name
IntPtr ptr = Marshal.ReadIntPtr(tempPtr);
if (ptr != (IntPtr)0)
Marshal.FreeHGlobal(ptr);
// free the marshalled rule
ptr = Marshal.ReadIntPtr(tempPtr, Marshal.SizeOf(typeof(IntPtr)));
if (ptr != (IntPtr)0)
Marshal.FreeHGlobal(ptr);
Marshal.FreeHGlobal(tempPtr);
}
}
Marshal.FreeHGlobal(memHandle);
}
}
return base.GetValue();
}