private static Hashtable DnsQueryWrapper(string domainName, string siteName, long dcFlags)
{
Hashtable hashtable = new Hashtable();
string recordName = "_ldap._tcp.";
int errorCode = 0;
int options = 0;
IntPtr zero = IntPtr.Zero;
if ((siteName != null) && (siteName.Length != 0))
{
recordName = recordName + siteName + "._sites.";
}
if ((dcFlags & 0x40L) != 0L)
{
recordName = recordName + "gc._msdcs.";
}
else if ((dcFlags & 0x1000L) != 0L)
{
recordName = recordName + "dc._msdcs.";
}
recordName = recordName + domainName;
if ((dcFlags & 1L) != 0L)
{
options |= 8;
}
errorCode = System.DirectoryServices.ActiveDirectory.NativeMethods.DnsQuery(recordName, 0x21, options, IntPtr.Zero, out zero, IntPtr.Zero);
if (errorCode == 0)
{
try
{
PartialDnsRecord record;
for (IntPtr ptr2 = zero; ptr2 != IntPtr.Zero; ptr2 = record.next)
{
record = new PartialDnsRecord();
Marshal.PtrToStructure(ptr2, record);
if (record.type == 0x21)
{
DnsRecord structure = new DnsRecord();
Marshal.PtrToStructure(ptr2, structure);
string key = structure.data.targetName.ToLower(CultureInfo.InvariantCulture);
if (!hashtable.Contains(key))
{
hashtable.Add(key, null);
}
}
}
return hashtable;
}
finally
{
if (zero != IntPtr.Zero)
{
System.DirectoryServices.ActiveDirectory.NativeMethods.DnsRecordListFree(zero, true);
}
}
}
if (errorCode != 0)
{
throw ExceptionHelper.GetExceptionFromErrorCode(errorCode);
}
return hashtable;
}
private static Hashtable DnsQueryWrapper(string domainName, string siteName, long dcFlags)
{
Hashtable domainControllers = new Hashtable();
string recordName = "_ldap._tcp.";
int result = 0;
int options = 0;
IntPtr dnsResults = IntPtr.Zero;
// construct the record name
if ((siteName != null) && (!(siteName.Length == 0)))
{
// only looking for domain controllers / global catalogs within a
// particular site
recordName = recordName + siteName + "._sites.";
}
// check if gc or dc
if (((long)dcFlags & (long)(PrivateLocatorFlags.GCRequired)) != 0)
{
// global catalog
recordName += "gc._msdcs.";
}
else if (((long)dcFlags & (long)(PrivateLocatorFlags.DSWriteableRequired)) != 0)
{
// domain controller
recordName += "dc._msdcs.";
}
// now add the domainName
recordName = recordName + domainName;
// set the BYPASS CACHE option is specified
if (((long)dcFlags & (long)LocatorOptions.ForceRediscovery) != 0)
{
options |= NativeMethods.DnsQueryBypassCache;
}
// Call DnsQuery
result = NativeMethods.DnsQuery(recordName, NativeMethods.DnsSrvData, options, IntPtr.Zero, out dnsResults, IntPtr.Zero);
if (result == 0)
{
try
{
IntPtr currentDnsRecord = dnsResults;
while (currentDnsRecord != IntPtr.Zero)
{
// partial marshalling of dns record data
PartialDnsRecord partialDnsRecord = new PartialDnsRecord();
Marshal.PtrToStructure(currentDnsRecord, partialDnsRecord);
//check if the record is of type DNS_SRV_DATA
if (partialDnsRecord.type == NativeMethods.DnsSrvData)
{
// remarshal to get the srv record data
DnsRecord dnsRecord = new DnsRecord();
Marshal.PtrToStructure(currentDnsRecord, dnsRecord);
string targetName = dnsRecord.data.targetName;
string key = targetName.ToLowerInvariant();
if (!domainControllers.Contains(key))
{
domainControllers.Add(key, null);
}
}
// move to next record
currentDnsRecord = partialDnsRecord.next;
}
}
finally
{
// release the dns results buffer
if (dnsResults != IntPtr.Zero)
{
NativeMethods.DnsRecordListFree(dnsResults, true);
}
}
}
else if (result != 0)
{
throw ExceptionHelper.GetExceptionFromErrorCode(result);
}
return(domainControllers);
}
private static Hashtable DnsQueryWrapper(string domainName, string siteName, long dcFlags)
{
PartialDnsRecord partialDnsRecord = null;
Hashtable hashtables = new Hashtable();
string str = "_ldap._tcp.";
int num = 0;
IntPtr zero = IntPtr.Zero;
if (siteName != null && siteName.Length != 0)
{
str = string.Concat(str, siteName, "._sites.");
}
if ((dcFlags & (long)64) == (long)0)
{
if ((dcFlags & (long)0x1000) != (long)0)
{
str = string.Concat(str, "dc._msdcs.");
}
}
else
{
str = string.Concat(str, "gc._msdcs.");
}
str = string.Concat(str, domainName);
if ((dcFlags & (long)1) != (long)0)
{
num = num | 8;
}
int num1 = NativeMethods.DnsQuery(str, 33, num, IntPtr.Zero, out zero, IntPtr.Zero);
if (num1 != 0)
{
if (num1 != 0)
{
throw ExceptionHelper.GetExceptionFromErrorCode(num1);
}
}
else
{
try
{
for (IntPtr i = zero; i != IntPtr.Zero; i = partialDnsRecord.next)
{
partialDnsRecord = new PartialDnsRecord();
Marshal.PtrToStructure(i, partialDnsRecord);
if (partialDnsRecord.type == 33)
{
DnsRecord dnsRecord = new DnsRecord();
Marshal.PtrToStructure(i, dnsRecord);
string str1 = dnsRecord.data.targetName;
string lower = str1.ToLower(CultureInfo.InvariantCulture);
if (!hashtables.Contains(lower))
{
hashtables.Add(lower, null);
}
}
}
}
finally
{
if (zero != IntPtr.Zero)
{
NativeMethods.DnsRecordListFree(zero, true);
}
}
}
return(hashtables);
}
private static Hashtable DnsQueryWrapper(string domainName, string siteName, long dcFlags)
{
PartialDnsRecord partialDnsRecord = null;
Hashtable hashtables = new Hashtable();
string str = "_ldap._tcp.";
int num = 0;
IntPtr zero = IntPtr.Zero;
if (siteName != null && siteName.Length != 0)
{
str = string.Concat(str, siteName, "._sites.");
}
if ((dcFlags & (long)64) == (long)0)
{
if ((dcFlags & (long)0x1000) != (long)0)
{
str = string.Concat(str, "dc._msdcs.");
}
}
else
{
str = string.Concat(str, "gc._msdcs.");
}
str = string.Concat(str, domainName);
if ((dcFlags & (long)1) != (long)0)
{
num = num | 8;
}
int num1 = NativeMethods.DnsQuery(str, 33, num, IntPtr.Zero, out zero, IntPtr.Zero);
if (num1 != 0)
{
if (num1 != 0)
{
throw ExceptionHelper.GetExceptionFromErrorCode(num1);
}
}
else
{
try
{
for (IntPtr i = zero; i != IntPtr.Zero; i = partialDnsRecord.next)
{
partialDnsRecord = new PartialDnsRecord();
Marshal.PtrToStructure(i, partialDnsRecord);
if (partialDnsRecord.type == 33)
{
DnsRecord dnsRecord = new DnsRecord();
Marshal.PtrToStructure(i, dnsRecord);
string str1 = dnsRecord.data.targetName;
string lower = str1.ToLower(CultureInfo.InvariantCulture);
if (!hashtables.Contains(lower))
{
hashtables.Add(lower, null);
}
}
}
}
finally
{
if (zero != IntPtr.Zero)
{
NativeMethods.DnsRecordListFree(zero, true);
}
}
}
return hashtables;
}
private static Hashtable DnsQueryWrapper(string domainName, string siteName, long dcFlags)
{
Hashtable hashtable = new Hashtable();
string recordName = "_ldap._tcp.";
int errorCode = 0;
int options = 0;
IntPtr zero = IntPtr.Zero;
if ((siteName != null) && (siteName.Length != 0))
{
recordName = recordName + siteName + "._sites.";
}
if ((dcFlags & 0x40L) != 0L)
{
recordName = recordName + "gc._msdcs.";
}
else if ((dcFlags & 0x1000L) != 0L)
{
recordName = recordName + "dc._msdcs.";
}
recordName = recordName + domainName;
if ((dcFlags & 1L) != 0L)
{
options |= 8;
}
errorCode = System.DirectoryServices.ActiveDirectory.NativeMethods.DnsQuery(recordName, 0x21, options, IntPtr.Zero, out zero, IntPtr.Zero);
if (errorCode == 0)
{
try
{
PartialDnsRecord record;
for (IntPtr ptr2 = zero; ptr2 != IntPtr.Zero; ptr2 = record.next)
{
record = new PartialDnsRecord();
Marshal.PtrToStructure(ptr2, record);
if (record.type == 0x21)
{
DnsRecord structure = new DnsRecord();
Marshal.PtrToStructure(ptr2, structure);
string key = structure.data.targetName.ToLower(CultureInfo.InvariantCulture);
if (!hashtable.Contains(key))
{
hashtable.Add(key, null);
}
}
}
return(hashtable);
}
finally
{
if (zero != IntPtr.Zero)
{
System.DirectoryServices.ActiveDirectory.NativeMethods.DnsRecordListFree(zero, true);
}
}
}
if (errorCode != 0)
{
throw ExceptionHelper.GetExceptionFromErrorCode(errorCode);
}
return(hashtable);
}