protected override async Task <DnsResponse> QueryDnsImplAsync(DnsQueryParamBase param, CancellationToken cancel)
{
switch (param)
{
case DnsGetIpQueryParam getIpQuery:
if (IPAddress.TryParse(getIpQuery.Hostname, out IPAddress? ip))
{
return(new DnsResponse(param, ip._SingleArray()));
}
else
{
return(new DnsResponse(param, await PalDns.GetHostAddressesAsync(getIpQuery.Hostname, getIpQuery.Timeout, cancel)));
}
case DnsGetFqdnQueryParam getFqdnQuery:
var res = await PalDns.GetHostEntryAsync(getFqdnQuery.Ip._UnmapIPv4(), getFqdnQuery.Timeout, cancel);
List <string> hostNameList = new List <string>();
hostNameList.Add(res.HostName);
res.Aliases._DoForEach(x => hostNameList.Add(x));
hostNameList.Distinct();
return(new DnsResponse(param, hostNameList));
}
throw new NotImplementedException();
}
public DnsResponse(DnsQueryParamBase query, IEnumerable <string> fqdnList)
{
this.Query = query;
this.IPAddressList = new List <IPAddress>();
this.FqdnList = fqdnList.ToList();
}
public DnsResponse(DnsQueryParamBase query, IEnumerable <IPAddress> addressList)
{
this.Query = query;
IEnumerable <IPAddress> filtered = addressList;
if (this.Query.Options.Bit(DnsQueryOptions.IPv4Only))
{
filtered = filtered.Where(x => x.AddressFamily == AddressFamily.InterNetwork);
}
if (this.Query.Options.Bit(DnsQueryOptions.IPv6Only))
{
filtered = filtered.Where(x => x.AddressFamily == AddressFamily.InterNetworkV6);
}
this.IPAddressList = new List <IPAddress>(filtered);
this.FqdnList = new List <string>();
}
protected abstract Task <DnsResponse> QueryDnsImplAsync(DnsQueryParamBase param, CancellationToken cancel);
