public static async Task ServerOnQueryReceived(object sender, QueryReceivedEventArgs e)
{
if (!(e.Query is DnsMessage query))
{
return;
}
IPAddress clientAddress = e.RemoteEndpoint.Address;
if (DnsSettings.EDnsCustomize)
{
clientAddress = Equals(DnsSettings.EDnsIp, IPAddress.Parse("0.0.0.1"))
? IPAddress.Parse(MainWindow.IntIPAddr.ToString().Substring(
0, MainWindow.IntIPAddr.ToString().LastIndexOf(".", StringComparison.Ordinal)) + ".1") : DnsSettings.EDnsIp;
}
else if (Equals(clientAddress, IPAddress.Loopback) || IpTools.InSameLaNet(clientAddress, MainWindow.LocIPAddr))
{
clientAddress = MainWindow.IntIPAddr;
}
DnsMessage response = query.CreateResponseInstance();
if (query.Questions.Count <= 0)
{
response.ReturnCode = ReturnCode.ServerFailure;
}
else
{
foreach (DnsQuestion dnsQuestion in query.Questions)
{
response.ReturnCode = ReturnCode.NoError;
if (DnsSettings.DebugLog)
{
BackgroundLog($@"| {DateTime.Now} {e.RemoteEndpoint.Address} : {dnsQuestion.Name} | {dnsQuestion.RecordType.ToString().ToUpper()}");
}
if (DnsSettings.DnsCacheEnable && MemoryCache.Default.Contains($"{dnsQuestion.Name}{dnsQuestion.RecordType}"))
{
response.AnswerRecords.AddRange(
(List <DnsRecordBase>)MemoryCache.Default.Get($"{dnsQuestion.Name}{dnsQuestion.RecordType}"));
response.AnswerRecords.Add(new TxtRecord(DomainName.Parse("cache.auroradns.mili.one"), 0, "AuroraDNSC Cached"));
if (DnsSettings.DebugLog)
{
BackgroundLog($@"|- CacheContains : {dnsQuestion.Name} | Count : {MemoryCache.Default.Count()}");
}
}
else if (DnsSettings.BlackListEnable && DnsSettings.BlackList.Contains(dnsQuestion.Name) && dnsQuestion.RecordType == RecordType.A)
{
response.AnswerRecords.Add(new ARecord(dnsQuestion.Name, 10, IPAddress.Any));
response.AnswerRecords.Add(new TxtRecord(DomainName.Parse("blacklist.auroradns.mili.one"), 0, "AuroraDNSC Blocked"));
if (DnsSettings.DebugLog)
{
BackgroundLog(@"|- BlackList");
}
}
else if (DnsSettings.WhiteListEnable && DnsSettings.WhiteList.ContainsKey(dnsQuestion.Name) && dnsQuestion.RecordType == RecordType.A)
{
List <DnsRecordBase> whiteRecords = new List <DnsRecordBase>();
if (!IpTools.IsIp(DnsSettings.WhiteList[dnsQuestion.Name]))
{
whiteRecords.AddRange(new DnsClient(DnsSettings.SecondDnsIp, 1000)
.Resolve(dnsQuestion.Name, dnsQuestion.RecordType).AnswerRecords);
}
else
{
whiteRecords.Add(new ARecord(dnsQuestion.Name, 10,
IPAddress.Parse(DnsSettings.WhiteList[dnsQuestion.Name])));
}
response.AnswerRecords.AddRange(whiteRecords);
response.AnswerRecords.Add(new TxtRecord(DomainName.Parse("whitelist.auroradns.mili.one"), 0, "AuroraDNSC Rewrote"));
if (DnsSettings.DebugLog)
{
BackgroundLog(@"|- WhiteList");
}
}
else
{
//Resolve
try
{
(List <DnsRecordBase> resolvedDnsList, ReturnCode statusCode) = DnsSettings.DnsMsgEnable
? ResolveOverHttpsByDnsMsg(clientAddress.ToString(),
dnsQuestion.Name.ToString(), DnsSettings.HttpsDnsUrl, DnsSettings.ProxyEnable,
DnsSettings.WProxy, dnsQuestion.RecordType)
: ResolveOverHttpsByDnsJson(clientAddress.ToString(),
dnsQuestion.Name.ToString(), DnsSettings.HttpsDnsUrl, DnsSettings.ProxyEnable,
DnsSettings.WProxy, dnsQuestion.RecordType);
if (resolvedDnsList != null && resolvedDnsList.Count != 0 && statusCode == ReturnCode.NoError)
{
response.AnswerRecords.AddRange(resolvedDnsList);
if (DnsSettings.DnsCacheEnable)
{
BackgroundWriteCache(
new CacheItem($"{dnsQuestion.Name}{dnsQuestion.RecordType}", resolvedDnsList),
resolvedDnsList[0].TimeToLive);
}
}
else if (statusCode == ReturnCode.ServerFailure)
{
response.AnswerRecords = new DnsClient(DnsSettings.SecondDnsIp, 1000)
.Resolve(dnsQuestion.Name, dnsQuestion.RecordType).AnswerRecords;
BackgroundLog($"| -- SecondDns : {DnsSettings.SecondDnsIp}");
}
else
{
response.ReturnCode = statusCode;
}
}
catch (Exception ex)
{
response.ReturnCode = ReturnCode.ServerFailure;
BackgroundLog(@"| " + ex);
}
}
}
}
e.Response = response;
}
public static async Task ServerOnQueryReceived(object sender, QueryReceivedEventArgs e)
{
try
{
if (!(e.Query is DnsMessage query))
{
return;
}
IPAddress clientAddress = e.RemoteEndpoint.Address;
if (DnsSettings.EDnsCustomize)
{
clientAddress = Equals(DnsSettings.EDnsIp, IPAddress.Parse("0.0.0.1"))
? IPAddress.Parse(MainWindow.IntIPAddr.ToString().Substring(
0, MainWindow.IntIPAddr.ToString().LastIndexOf(".", StringComparison.Ordinal)) + ".1") : DnsSettings.EDnsIp;
}
else if (Equals(clientAddress, IPAddress.Loopback) || IpTools.InSameLaNet(clientAddress, MainWindow.LocIPAddr))
{
clientAddress = MainWindow.IntIPAddr;
}
DnsMessage response = query.CreateResponseInstance();
if (query.Questions.Count <= 0)
{
response.ReturnCode = ReturnCode.ServerFailure;
}
else
{
foreach (DnsQuestion dnsQuestion in query.Questions)
{
response.ReturnCode = ReturnCode.NoError;
if (DnsSettings.DebugLog)
{
BackgroundLog($@"| {DateTime.Now} {e.RemoteEndpoint.Address} : {dnsQuestion.Name} | {dnsQuestion.RecordType.ToString().ToUpper()}");
}
if (DomainName.Parse(new Uri(DnsSettings.HttpsDnsUrl).DnsSafeHost) == dnsQuestion.Name ||
DomainName.Parse(new Uri(DnsSettings.SecondHttpsDnsUrl).DnsSafeHost) == dnsQuestion.Name ||
DomainName.Parse(new Uri(UrlSettings.WhatMyIpApi).DnsSafeHost) == dnsQuestion.Name)
{
if (!DnsSettings.StartupOverDoH)
{
response.AnswerRecords.AddRange((await new DnsClient(DnsSettings.SecondDnsIp, 5000)
.ResolveAsync(dnsQuestion.Name, dnsQuestion.RecordType)).AnswerRecords);
if (DnsSettings.DebugLog)
{
BackgroundLog($"| -- Startup SecondDns : {DnsSettings.SecondDnsIp}");
}
}
else
{
response.AnswerRecords.AddRange(ResolveOverHttpsByDnsJson(clientAddress.ToString(),
dnsQuestion.Name.ToString(), "https://1.0.0.1/dns-query", DnsSettings.ProxyEnable,
DnsSettings.WProxy, dnsQuestion.RecordType).list);
if (DnsSettings.DebugLog)
{
BackgroundLog("| -- Startup DoH : https://1.0.0.1/dns-query");
}
}
}
else if (DnsSettings.DnsCacheEnable && DnsCache.Contains(query))
{
response.AnswerRecords.AddRange(DnsCache.Get(query).AnswerRecords);
//response.AnswerRecords.Add(new TxtRecord(DomainName.Parse("cache.auroradns.mili.one"), 0,
// "AuroraDNSC Cached"));
if (DnsSettings.DebugLog)
{
BackgroundLog(
$@"|- CacheContains : {dnsQuestion.Name} | Count : {MemoryCache.Default.Count()}");
}
}
else if (DnsSettings.BlackListEnable && DnsSettings.BlackList.Contains(dnsQuestion.Name))
{
response.AnswerRecords.Add(new ARecord(dnsQuestion.Name, 10, IPAddress.Any));
response.AnswerRecords.Add(new TxtRecord(DomainName.Parse("blacklist.auroradns.mili.one"), 0,
"AuroraDNSC Blocked"));
if (DnsSettings.DebugLog)
{
BackgroundLog(@"|- BlackList");
}
}
else if (DnsSettings.WhiteListEnable && DnsSettings.WhiteList.ContainsKey(dnsQuestion.Name))
{
List <DnsRecordBase> whiteRecords = new List <DnsRecordBase>();
if (!IpTools.IsIp(DnsSettings.WhiteList[dnsQuestion.Name]))
{
whiteRecords.AddRange((await new DnsClient(DnsSettings.SecondDnsIp, 5000)
.ResolveAsync(dnsQuestion.Name, dnsQuestion.RecordType)).AnswerRecords);
}
else
{
whiteRecords.Add(new ARecord(dnsQuestion.Name, 10,
IPAddress.Parse(DnsSettings.WhiteList[dnsQuestion.Name])));
}
response.AnswerRecords.AddRange(whiteRecords);
response.AnswerRecords.Add(new TxtRecord(DomainName.Parse("whitelist.auroradns.mili.one"), 0,
"AuroraDNSC Rewrote"));
if (DnsSettings.DebugLog)
{
BackgroundLog(@"|- WhiteList");
}
}
else if (DnsSettings.ChinaListEnable && DomainNameInChinaList(dnsQuestion.Name))
{
try
{
var resolvedDnsList = ResolveOverHttpByDPlus(dnsQuestion.Name.ToString());
if (resolvedDnsList != null && resolvedDnsList != new List <DnsRecordBase>())
{
resolvedDnsList.Add(new TxtRecord(DomainName.Parse("chinalist.auroradns.mili.one"),
0, "AuroraDNSC ChinaList - DNSPod D+"));
foreach (var item in resolvedDnsList)
{
response.AnswerRecords.Add(item);
}
if (DnsSettings.DebugLog)
{
BackgroundLog(@"|- ChinaList - DNSPOD D+");
}
if (DnsSettings.DnsCacheEnable && response.ReturnCode == ReturnCode.NoError)
{
BackgroundWriteCache(response);
}
}
}
catch (Exception exception)
{
BackgroundLog(exception.ToString());
}
}
else
{
//Resolve
try
{
(List <DnsRecordBase> resolvedDnsList, ReturnCode statusCode) = DnsSettings.DnsMsgEnable
? ResolveOverHttpsByDnsMsg(clientAddress.ToString(),
dnsQuestion.Name.ToString(), DnsSettings.HttpsDnsUrl, DnsSettings.ProxyEnable,
DnsSettings.WProxy, dnsQuestion.RecordType)
: ResolveOverHttpsByDnsJson(clientAddress.ToString(),
dnsQuestion.Name.ToString(), DnsSettings.HttpsDnsUrl, DnsSettings.ProxyEnable,
DnsSettings.WProxy, dnsQuestion.RecordType);
if (resolvedDnsList != null && resolvedDnsList.Count != 0 && statusCode == ReturnCode.NoError)
{
response.AnswerRecords.AddRange(resolvedDnsList);
if (DnsSettings.DnsCacheEnable)
{
BackgroundWriteCache(response);
}
}
else if (statusCode == ReturnCode.ServerFailure)
{
response.AnswerRecords = (await new DnsClient(DnsSettings.SecondDnsIp, 1000)
.ResolveAsync(dnsQuestion.Name, dnsQuestion.RecordType)).AnswerRecords;
BackgroundLog($"| -- SecondDns : {DnsSettings.SecondDnsIp}");
}
else
{
response.ReturnCode = statusCode;
}
}
catch (Exception ex)
{
response.ReturnCode = ReturnCode.ServerFailure;
BackgroundLog(@"| " + ex);
}
}
}
}
if (DnsSettings.TtlRewrite &&
response.AnswerRecords.All(item => item.Name != DomainName.Parse("cache.auroradns.mili.one")))
{
var list = response.AnswerRecords.Where(item =>
item.TimeToLive < DnsSettings.TtlMinTime - DateTime.Now.Second).ToList();
foreach (var item in list)
{
switch (item)
{
case ARecord aRecord:
response.AnswerRecords.Add(
new ARecord(aRecord.Name, DnsSettings.TtlMinTime, aRecord.Address));
response.AnswerRecords.Remove(item);
break;
case AaaaRecord aaaaRecord:
response.AnswerRecords.Add(
new ARecord(aaaaRecord.Name, DnsSettings.TtlMinTime, aaaaRecord.Address));
response.AnswerRecords.Remove(item);
break;
case CNameRecord cNameRecord:
response.AnswerRecords.Add(new CNameRecord(cNameRecord.Name, DnsSettings.TtlMinTime,
cNameRecord.CanonicalName));
response.AnswerRecords.Remove(item);
break;
}
}
if (list.Count > 0)
{
response.AnswerRecords.Add(new TxtRecord(DomainName.Parse("ttl.auroradns.mili.one"), 600,
$"Rewrite TTL to {DnsSettings.TtlMinTime}"));
}
}
e.Response = response;
}
catch (Exception exception)
{
Console.WriteLine(exception);
BackgroundLog(exception.ToString());
}
}
public static async Task ServerOnQueryReceived(object sender, QueryReceivedEventArgs e)
{
if (!(e.Query is DnsMessage query))
{
return;
}
IPAddress clientAddress = e.RemoteEndpoint.Address;
if (DnsSettings.EDnsCustomize)
{
clientAddress = Equals(DnsSettings.EDnsIp, IPAddress.Parse("0.0.0.1"))
? IPAddress.Parse(MainWindow.IntIPAddr.ToString().Substring(
0, MainWindow.IntIPAddr.ToString().LastIndexOf(".", StringComparison.Ordinal)) + ".1") : DnsSettings.EDnsIp;
}
else if (Equals(clientAddress, IPAddress.Loopback) || IpTools.InSameLaNet(clientAddress, MainWindow.LocIPAddr))
{
clientAddress = MainWindow.IntIPAddr;
}
DnsMessage response = query.CreateResponseInstance();
if (query.Questions.Count <= 0)
{
response.ReturnCode = ReturnCode.ServerFailure;
}
else
{
foreach (DnsQuestion dnsQuestion in query.Questions)
{
response.ReturnCode = ReturnCode.NoError;
if (DnsSettings.DebugLog)
{
BgwLog($@"| {DateTime.Now} {e.RemoteEndpoint.Address} : {dnsQuestion.Name} | {dnsQuestion.RecordType.ToString().ToUpper()}");
}
if (DnsSettings.BlackListEnable && DnsSettings.BlackList.Contains(dnsQuestion.Name) && dnsQuestion.RecordType == RecordType.A)
{
//BlackList
ARecord blackRecord = new ARecord(dnsQuestion.Name, 10, IPAddress.Any);
response.AnswerRecords.Add(blackRecord);
if (DnsSettings.DebugLog)
{
BgwLog(@"|- BlackList");
}
}
else if (DnsSettings.WhiteListEnable && DnsSettings.WhiteList.ContainsKey(dnsQuestion.Name) && dnsQuestion.RecordType == RecordType.A)
{
List <DnsRecordBase> whiteRecords = new List <DnsRecordBase>();
if (!IpTools.IsIp(DnsSettings.WhiteList[dnsQuestion.Name]))
{
whiteRecords.AddRange(new DnsClient(DnsSettings.SecondDnsIp, 1000)
.Resolve(dnsQuestion.Name, dnsQuestion.RecordType).AnswerRecords);
}
else
{
whiteRecords.Add(new ARecord(dnsQuestion.Name, 10,
IPAddress.Parse(DnsSettings.WhiteList[dnsQuestion.Name])));
}
response.AnswerRecords.AddRange(whiteRecords);
if (DnsSettings.DebugLog)
{
BgwLog(@"|- WhiteList");
}
}
else
{
//Resolve
try
{
var(resolvedDnsList, statusCode) = ResolveOverHttps(clientAddress.ToString(),
dnsQuestion.Name.ToString(), DnsSettings.HttpsDnsUrl, DnsSettings.ProxyEnable,
DnsSettings.WProxy, dnsQuestion.RecordType);
if (resolvedDnsList != null && resolvedDnsList.Count != 0 &&
statusCode == ReturnCode.NoError)
{
response.AnswerRecords.AddRange(resolvedDnsList);
}
else if (statusCode == ReturnCode.ServerFailure)
{
response.AnswerRecords = new DnsClient(DnsSettings.SecondDnsIp, 1000)
.Resolve(dnsQuestion.Name, dnsQuestion.RecordType).AnswerRecords;
BgwLog($"| -- SecondDns : {DnsSettings.SecondDnsIp}");
}
else
{
response.ReturnCode = statusCode;
}
}
catch (Exception ex)
{
response.ReturnCode = ReturnCode.ServerFailure;
BgwLog(@"| " + ex);
}
}
}
}
e.Response = response;
}