private IEnumerable <IPAddress> GetNameServerIpAddresses(IEnumerable <string> nsRecords, int round)
{
foreach (var nsRecord in nsRecords)
{
using (LogContext.PushProperty("NameServer", nsRecord))
{
_log.Verbose("Querying IP for name server");
var aResponse = _provider.GetDefaultClient(round).LookupClient.Query(nsRecord, QueryType.A);
var nameServerIp = aResponse.Answers.ARecords().FirstOrDefault()?.Address;
_log.Verbose("Name server IP {NameServerIpAddress} identified", nameServerIp);
yield return(nameServerIp);
}
}
}
