public Task <DNS.Protocol.IResponse> Resolve(DNS.Protocol.IRequest request, CancellationToken cancellationToken = default) { DNS.Protocol.IResponse response = DNS.Protocol.Response.FromRequest(request); foreach (var question in response.Questions) { if (question.Type == DNS.Protocol.RecordType.A) { var client = new DnsClient.LookupClient(DnsClient.NameServer.GooglePublicDns); client.UseTcpOnly = true; client.UseCache = true; try { var result = client.Query(question.Name.ToString(), DnsClient.QueryType.A); foreach (var item in result.Answers.ARecords()) { response.AnswerRecords.Add(new DNS.Protocol.ResourceRecords.IPAddressResourceRecord(question.Name, item.Address)); } } catch (Exception) { // 跳过 } } else if (question.Type == DNS.Protocol.RecordType.AAAA) { var client = new DnsClient.LookupClient(DnsClient.NameServer.GooglePublicDns); client.UseTcpOnly = true; client.UseCache = true; try { var result = client.Query(question.Name.ToString(), DnsClient.QueryType.AAAA); foreach (var item in result.Answers.AaaaRecords()) { response.AnswerRecords.Add(new DNS.Protocol.ResourceRecords.IPAddressResourceRecord(question.Name, item.Address)); } } catch (Exception) { // 跳过 } } else { // 跳过 } } return(Task.FromResult(response)); }
static void serverResponded(DNS.Protocol.IRequest request, DNS.Protocol.IResponse response) { //called when dns response is send }