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:ambulance:恢复本地DNS服务

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Amazing_DM
2020-03-06 12:37:14 +08:00
parent 26af839d01
commit caa6b8fa94
4 changed files with 106 additions and 1 deletions
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59
Netch/Resolver.cs Normal file
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using DNS.Protocol;
using System;
using System.Linq;
using System.Threading.Tasks;
namespace Netch
{
public class Resolver : DNS.Client.RequestResolver.IRequestResolver
{
public Task<IResponse> Resolve(IRequest request)
{
IResponse response = Response.FromRequest(request);
foreach (var question in response.Questions)
{
if (question.Type == 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 == 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
}
}
}
return Task.FromResult(response);
}
}
}