internal static string FetchResults(IAsyncResult ar)
{
int priority = -1;
int weight = -1;
SrvRecord[] array;
DnsStatus dnsStatus = Dns.EndResolveToSrvRecords(ar, out array);
if (dnsStatus != DnsStatus.Success)
{
AutoDiscoverDnsReader.DnsReaderTracer.TraceError(0L, "Failed to get results from DNS.");
return(null);
}
int length = array.GetLength(0);
if (length == 0)
{
AutoDiscoverDnsReader.DnsReaderTracer.TraceError(0L, "No SRV records were returned.");
return(null);
}
AutoDiscoverDnsReader.DnsReaderTracer.TraceDebug <int>(0L, "{0} SRV records were returned.", length);
bool flag = false;
for (int i = 0; i < length; i++)
{
if (array[i].Port == 443)
{
priority = array[i].Priority;
weight = array[i].Weight;
flag = true;
break;
}
}
if (!flag)
{
AutoDiscoverDnsReader.DnsReaderTracer.TraceError(0L, "No SRV records were returned with SSL Port specified.");
return(null);
}
SrvRecord[] array2 = Array.FindAll <SrvRecord>(array, (SrvRecord srvRecord) => srvRecord.Port == 443 && priority == srvRecord.Priority && weight == srvRecord.Weight);
int num = 0;
length = array2.GetLength(0);
AutoDiscoverDnsReader.DnsReaderTracer.TraceDebug <int, int>(0L, "Found {0} SRV records with priority = {1}.", length, array2[0].Priority);
if (length > 1)
{
num = AutoDiscoverDnsReader.randomIndexSelector.Next(length);
}
return(array2[num].TargetHost);
}
private static Task <DnsTroubleshooter.SrvQueryResult> QuerySrvRecords(DnsTroubleshooter.DnsQueryContext context)
{
if (context == null)
{
throw new ArgumentNullException("state");
}
context.SrvQuery = string.Format("_ldap._tcp.dc._msdcs.{0}", context.DomainFqdn);
Dns client = DnsTroubleshooter.Client;
return(Task.Factory.FromAsync <string, DnsQueryOptions, DnsTroubleshooter.SrvQueryResult>(new Func <string, DnsQueryOptions, AsyncCallback, object, IAsyncResult>(client.BeginRetrieveSrvRecords), delegate(IAsyncResult x)
{
ExTraceGlobals.FaultInjectionTracer.TraceTest(2244357437U);
SrvRecord[] srvRecords;
DnsStatus status = Dns.EndResolveToSrvRecords(x, out srvRecords);
return new DnsTroubleshooter.SrvQueryResult(status, srvRecords);
}, context.SrvQuery, DnsQueryOptions.UseTcpOnly | DnsQueryOptions.BypassCache, context, TaskCreationOptions.AttachedToParent));
}