private ADRawEntry[] GetNextResultCollection()
{
this.vlvRequestControl.ContextId = base.Cookie;
DirectoryControl directoryControl;
SearchResultEntryCollection nextResultCollection = base.GetNextResultCollection(typeof(VlvResponseControl), out directoryControl);
ADProviderPerf.UpdateProcessCounter(Counter.ProcessRateVlv, UpdateType.Add, 1U);
ADProviderPerf.UpdateDCCounter(base.PreferredServerName, Counter.DCRateVlv, UpdateType.Add, 1U);
base.Cookie = null;
if (directoryControl != null)
{
VlvResponseControl vlvResponseControl = (VlvResponseControl)directoryControl;
base.Cookie = vlvResponseControl.ContextId;
this.estimatedRowCount = vlvResponseControl.ContentCount;
this.currentRow = vlvResponseControl.TargetPosition;
}
if (nextResultCollection == null)
{
return(null);
}
return(base.Session.ObjectsFromEntries <ADRawEntry>(nextResultCollection, base.PreferredServerName, this.properties, ADVirtualListView.dummyADRawEntry));
}
internal static void TransformControls(DirectoryControl[] controls)
{
for (int i = 0; i < controls.Length; i++)
{
Debug.Assert(controls[i] != null);
byte[] value = controls[i].GetValue();
if (controls[i].Type == "1.2.840.113556.1.4.319")
{
// The control is a PageControl.
object[] result = BerConverter.Decode("{iO}", value);
Debug.Assert((result != null) && (result.Length == 2));
int size = (int)result[0];
// user expects cookie with length 0 as paged search is done.
byte[] cookie = (byte[])result[1] ?? Array.Empty <byte>();
PageResultResponseControl pageControl = new PageResultResponseControl(size, cookie, controls[i].IsCritical, controls[i].GetValue());
controls[i] = pageControl;
}
else if (controls[i].Type == "1.2.840.113556.1.4.1504")
{
// The control is an AsqControl.
object[] o = BerConverter.Decode("{e}", value);
Debug.Assert((o != null) && (o.Length == 1));
int result = (int)o[0];
AsqResponseControl asq = new AsqResponseControl(result, controls[i].IsCritical, controls[i].GetValue());
controls[i] = asq;
}
else if (controls[i].Type == "1.2.840.113556.1.4.841")
{
// The control is a DirSyncControl.
object[] o = BerConverter.Decode("{iiO}", value);
Debug.Assert(o != null && o.Length == 3);
int moreData = (int)o[0];
int count = (int)o[1];
byte[] dirsyncCookie = (byte[])o[2];
DirSyncResponseControl dirsync = new DirSyncResponseControl(dirsyncCookie, (moreData == 0 ? false : true), count, controls[i].IsCritical, controls[i].GetValue());
controls[i] = dirsync;
}
else if (controls[i].Type == "1.2.840.113556.1.4.474")
{
// The control is a SortControl.
int result = 0;
string attribute = null;
object[] o = BerConverter.TryDecode("{ea}", value, out bool decodeSucceeded);
// decode might fail as AD for example never returns attribute name, we don't want to unnecessarily throw and catch exception
if (decodeSucceeded)
{
Debug.Assert(o != null && o.Length == 2);
result = (int)o[0];
attribute = (string)o[1];
}
else
{
// decoding might fail as attribute is optional
o = BerConverter.Decode("{e}", value);
Debug.Assert(o != null && o.Length == 1);
result = (int)o[0];
}
SortResponseControl sort = new SortResponseControl((ResultCode)result, attribute, controls[i].IsCritical, controls[i].GetValue());
controls[i] = sort;
}
else if (controls[i].Type == "2.16.840.1.113730.3.4.10")
{
// The control is a VlvResponseControl.
int position;
int count;
int result;
byte[] context = null;
object[] o = BerConverter.TryDecode("{iieO}", value, out bool decodeSucceeded);
if (decodeSucceeded)
{
Debug.Assert(o != null && o.Length == 4);
position = (int)o[0];
count = (int)o[1];
result = (int)o[2];
context = (byte[])o[3];
}
else
{
o = BerConverter.Decode("{iie}", value);
Debug.Assert(o != null && o.Length == 3);
position = (int)o[0];
count = (int)o[1];
result = (int)o[2];
}
VlvResponseControl vlv = new VlvResponseControl(position, count, context, (ResultCode)result, controls[i].IsCritical, controls[i].GetValue());
controls[i] = vlv;
}
}
}
public VlvData GetData(LdapConnection conn, string distinguishedName, string filter, string sortBy, SearchScope scope, int skip, int take, string[] attrs)
{
string key = string.Join(",", new[] { distinguishedName, filter, scope.ToString(), sortBy });
int contentEstimate;
var known = _estimates.TryGetValue(key, out contentEstimate);
if (take < 1)
{
if (known)
{
return new VlvData
{
ContentCount = contentEstimate
}
}
;
take = 1;
}
var req = new SearchRequest(distinguishedName, filter, scope, attrs);
req.Controls.Add(new SortRequestControl(sortBy, false));
req.Controls.Add(new VlvRequestControl
{
EstimateCount = contentEstimate,
BeforeCount = 0,
AfterCount = take - 1,
Offset = skip < 1 ? 1 : skip + 1
});
SearchResponse resp = (SearchResponse)conn.SendRequest(req);
VlvResponseControl vlvresp = null;
foreach (var control in resp.Controls)
{
if ((vlvresp = control as VlvResponseControl) != null)
{
break;
}
}
if (vlvresp == null)
{
throw new ApplicationException("No VlvResponseControl found in response");
}
if (!known)
{
_estimates[key] = vlvresp.ContentCount;
}
return(new VlvData
{
ContentCount = vlvresp.ContentCount,
Entries = resp.Entries,
VlvContextId = vlvresp.ContextId,
IsDone = vlvresp.TargetPosition + take > vlvresp.ContentCount
});
}
}