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ipv6客户端

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This commit is contained in:
陈国伟 2021-11-17 16:24:55 +08:00
parent 516f04a7d7
commit 909a58a15c
2 changed files with 48 additions and 23 deletions
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57
FastGithub.DomainResolve/DnsClient.cs
View File

@ -91,7 +91,10 @@ namespace FastGithub.DomainResolve
foreach (var fallbackDns in this.fastGithubConfig.FallbackDns)
{
yield return fallbackDns;
if (Socket.OSSupportsIPv6 || fallbackDns.AddressFamily != AddressFamily.InterNetworkV6)
{
yield return fallbackDns;
}
}
}
@ -153,17 +156,8 @@ namespace FastGithub.DomainResolve
? (IRequestResolver)new TcpRequestResolver(dns)
: new UdpRequestResolver(dns, new TcpRequestResolver(dns), this.resolveTimeout);
var request = new Request
{
RecursionDesired = true,
OperationCode = OperationCode.Query
};
request.Questions.Add(new Question(new Domain(endPoint.Host), RecordType.A));
var clientRequest = new ClientRequest(resolver, request);
var response = await clientRequest.Resolve(cancellationToken);
var addresses = response.AnswerRecords
var answerRecords = await GetAnswerRecordsAsync(resolver, endPoint.Host, cancellationToken);
var addresses = answerRecords
.OfType<IPAddressResourceRecord>()
.Where(item => IPAddress.IsLoopback(item.IPAddress) == false)
.Select(item => item.IPAddress)
@ -179,7 +173,7 @@ namespace FastGithub.DomainResolve
addresses = await OrderByConnectAnyAsync(addresses, endPoint.Port, cancellationToken);
}
var timeToLive = response.AnswerRecords.First().TimeToLive;
var timeToLive = answerRecords.First().TimeToLive;
if (timeToLive <= TimeSpan.Zero)
{
timeToLive = this.defaultEmptyTtl;
@ -187,6 +181,43 @@ namespace FastGithub.DomainResolve
return new LookupResult(addresses, timeToLive);
}
/// <summary>
/// 获取答案
/// </summary>
/// <param name="resolver"></param>
/// <param name="domain"></param>
/// <param name="cancellationToken"></param>
/// <returns></returns>
private static async Task<IList<IResourceRecord>> GetAnswerRecordsAsync(IRequestResolver resolver, string domain, CancellationToken cancellationToken)
{
var answerRecords = await GetAnswerAsync(RecordType.A);
if (Socket.OSSupportsIPv6 == true)
{
var ipv6Records = await GetAnswerAsync(RecordType.AAAA);
foreach (var record in ipv6Records)
{
answerRecords.Add(record);
}
}
return answerRecords;
async Task<IList<IResourceRecord>> GetAnswerAsync(RecordType recordType)
{
var request = new Request
{
RecursionDesired = true,
OperationCode = OperationCode.Query
};
request.Questions.Add(new Question(new Domain(domain), recordType));
var clientRequest = new ClientRequest(resolver, request);
var response = await clientRequest.Resolve(cancellationToken);
return response.AnswerRecords;
}
}
/// <summary>
/// 连接速度排序
/// </summary>

14
FastGithub.PacketIntercept/Dns/DnsInterceptor.cs
View File

@ -142,16 +142,9 @@ namespace FastGithub.PacketIntercept.Dns
// dns响应数据
var response = Response.FromRequest(request);
if (question.Type == RecordType.A)
{
var record = new IPAddressResourceRecord(domain, IPAddress.Loopback, this.ttl);
response.AnswerRecords.Add(record);
this.logger.LogInformation($"{domain}->{IPAddress.Loopback}");
}
else
{
this.logger.LogInformation($"{domain}->NULL");
}
var loopback = question.Type == RecordType.A ? IPAddress.Loopback : IPAddress.Loopback.MapToIPv6();
var record = new IPAddressResourceRecord(domain, loopback, this.ttl);
response.AnswerRecords.Add(record);
var responsePayload = response.ToArray();
// 修改payload和包长
@ -187,6 +180,7 @@ namespace FastGithub.PacketIntercept.Dns
: WinDivertDirection.Inbound;
WinDivert.WinDivertHelperCalcChecksums(winDivertBuffer, packetLength, ref winDivertAddress, WinDivertChecksumHelperParam.All);
this.logger.LogInformation($"{domain}->{loopback}");
}