internal static extern int DsGetDcNext([In] SafeDsGetDcContextHandle getDcContextHandle, [In][Out] ref IntPtr sockAddressCount, out IntPtr sockAdresses, out SafeDnsHostNameHandle dnsHostName);
private StringCollection FindAllDirectoryServers(string forestFqdn, bool requireGCs, string siteName = null)
{
Hashtable hashtable = new Hashtable();
SafeDsGetDcContextHandle safeDsGetDcContextHandle = null;
SafeDnsHostNameHandle safeDnsHostNameHandle = null;
IntPtr zero = IntPtr.Zero;
IntPtr zero2 = IntPtr.Zero;
NativeMethods.DsGetDcOpenFlags dsGetDcOpenFlags = NativeMethods.DsGetDcOpenFlags.ForceRediscovery;
if (requireGCs)
{
dsGetDcOpenFlags |= NativeMethods.DsGetDcOpenFlags.GCRequired;
}
try
{
int num = NativeMethods.DsGetDcOpen(forestFqdn, 0, siteName, IntPtr.Zero, null, (int)dsGetDcOpenFlags, out safeDsGetDcContextHandle);
ExTraceGlobals.FaultInjectionTracer.TraceTest(3854970173U);
if (num != 0)
{
throw new ADTransientException(DirectoryStrings.ExceptionNativeErrorWhenLookingForServersInDomain(num, forestFqdn, NativeHelpers.GetErrorMessageFromNativeError(num)));
}
num = NativeMethods.DsGetDcNext(safeDsGetDcContextHandle, ref zero, out zero2, out safeDnsHostNameHandle);
if (num != 0 && num != 1101 && num != 9003 && num != 259)
{
throw new ADTransientException(DirectoryStrings.ExceptionNativeErrorWhenLookingForServersInDomain(num, forestFqdn, NativeHelpers.GetErrorMessageFromNativeError(num)));
}
while (num != 259)
{
if (num != 1101 && num != 9003)
{
try
{
string text = Marshal.PtrToStringUni(safeDnsHostNameHandle.DangerousGetHandle());
string key = text.ToLower(CultureInfo.InvariantCulture);
if (!hashtable.ContainsKey(key))
{
hashtable.Add(key, null);
}
}
finally
{
if (safeDnsHostNameHandle != null)
{
safeDnsHostNameHandle.Dispose();
safeDnsHostNameHandle = null;
}
}
}
num = NativeMethods.DsGetDcNext(safeDsGetDcContextHandle, ref zero, out zero2, out safeDnsHostNameHandle);
if (num != 0 && num != 1101 && num != 9003 && num != 259)
{
throw new ADTransientException(DirectoryStrings.ExceptionNativeErrorWhenLookingForServersInDomain(num, forestFqdn, NativeHelpers.GetErrorMessageFromNativeError(num)));
}
}
}
finally
{
if (safeDsGetDcContextHandle != null)
{
safeDsGetDcContextHandle.Dispose();
}
if (safeDnsHostNameHandle != null)
{
safeDnsHostNameHandle.Dispose();
}
}
StringCollection stringCollection = new StringCollection();
foreach (object obj in hashtable.Keys)
{
string value = (string)obj;
stringCollection.Add(value);
}
return(stringCollection);
}
