public static string GetDomainForestNameFromServer(string serverFqdn)
{
if (string.IsNullOrEmpty(serverFqdn))
{
throw new ArgumentNullException("serverFqdn");
}
NativeMethods.InteropDsRolePrimaryDomainInfoBasic primaryDomainInformation = NativeHelpers.GetPrimaryDomainInformation(serverFqdn);
return(primaryDomainInformation.domainForestName);
}
private static NativeMethods.InteropDsRolePrimaryDomainInfoBasic GetPrimaryDomainInformation(string serverFqdn = null)
{
SafeDsRolePrimaryDomainInfoLevelHandle safeDsRolePrimaryDomainInfoLevelHandle = null;
int num = 0;
NativeMethods.InteropDsRolePrimaryDomainInfoBasic result;
try
{
int num2;
for (;;)
{
num2 = NativeMethods.DsRoleGetPrimaryDomainInformation(serverFqdn, NativeMethods.DsRolePrimaryDomainInfoBasic, out safeDsRolePrimaryDomainInfoLevelHandle);
if (num2 == 0)
{
goto IL_8A;
}
if (num2 != 1723)
{
goto IL_73;
}
if (num >= NativeHelpers.MaxCallRetry)
{
break;
}
num++;
Thread.Sleep(num * NativeHelpers.CallRetryBaseSleepTime);
}
Globals.LogEvent(DirectoryEventLogConstants.Tuple_DSC_EVENT_RPC_SERVER_TOO_BUSY, "DsRoleGetPrimaryDomainInformation", new object[]
{
"DsRoleGetPrimaryDomainInformation",
1723
});
throw new ADTransientException(DirectoryStrings.ExceptionDomainInfoRpcTooBusy);
IL_73:
throw new CannotGetDomainInfoException(DirectoryStrings.CannotGetDomainInfo(num2.ToString("X")));
IL_8A:
NativeMethods.InteropDsRolePrimaryDomainInfoBasic interopDsRolePrimaryDomainInfoBasic = new NativeMethods.InteropDsRolePrimaryDomainInfoBasic();
Marshal.PtrToStructure(safeDsRolePrimaryDomainInfoLevelHandle.DangerousGetHandle(), interopDsRolePrimaryDomainInfoBasic);
if (string.IsNullOrEmpty(interopDsRolePrimaryDomainInfoBasic.domainNameDns))
{
throw new CannotGetDomainInfoException(DirectoryStrings.CannotGetUsefulDomainInfo);
}
result = interopDsRolePrimaryDomainInfoBasic;
}
finally
{
if (safeDsRolePrimaryDomainInfoLevelHandle != null)
{
safeDsRolePrimaryDomainInfoLevelHandle.Dispose();
}
}
return(result);
}
public static bool LocalMachineRoleIsDomainController()
{
NativeMethods.InteropDsRolePrimaryDomainInfoBasic primaryDomainInformation = NativeHelpers.GetPrimaryDomainInformation(null);
return(primaryDomainInformation.machineRole == NativeMethods.MachineRole.PrimaryDomainController || primaryDomainInformation.machineRole == NativeMethods.MachineRole.BackupDomainController);
}
public string GetForestNameHookable()
{
NativeMethods.InteropDsRolePrimaryDomainInfoBasic primaryDomainInformation = NativeHelpers.GetPrimaryDomainInformation(null);
return(primaryDomainInformation.domainForestName);
}
