private async Task <IpData?> LoadReverseDns(IPAddress ip, CancellationToken cancellationToken)
{
try
{
var response = await _dns.QueryReverseAsync(ip, cancellationToken);
var ptr = response.Answers.PtrRecords().FirstOrDefault();
return(ptr == null
? null
: new IpData
{
HostName = ptr.PtrDomainName.ToString().TrimEnd('.')
});
}
catch (Exception ex)
{
_logger.LogDebug(ex, $"Could not load reverse DNS data for {ip}: {ex.Message}");
return(null);
}
}