public static bool Contains(DnsMessage dnsQMsg, HttpContext context = null)
{
return(context == null
? MemoryCache.Default.Contains(
$"DNS:{dnsQMsg.Questions.FirstOrDefault().Name}:{dnsQMsg.Questions.FirstOrDefault().RecordType}")
: MemoryCache.Default.Contains(
$"DNS:{GeoIP.GetGeoStr(RealIP.GetFromDns(dnsQMsg, context))}{dnsQMsg.Questions.FirstOrDefault().Name}:{dnsQMsg.Questions.FirstOrDefault().RecordType}"));
}
public static DnsMessage Get(DnsMessage dnsQMessage, HttpContext context = null)
{
var dCacheMsg = new DnsMessage
{
IsRecursionAllowed = true,
IsRecursionDesired = true,
TransactionID = dnsQMessage.TransactionID
};
var getName = context != null
? $"DNS:{GeoIP.GetGeoStr(RealIP.GetFromDns(dnsQMessage, context))}{dnsQMessage.Questions.FirstOrDefault().Name}:{dnsQMessage.Questions.FirstOrDefault().RecordType}"
: $"DNS:{dnsQMessage.Questions.FirstOrDefault().Name}:{dnsQMessage.Questions.FirstOrDefault().RecordType}";
var cacheEntity = Get(getName);
foreach (var item in cacheEntity.List)
{
if (item is ARecord aRecord)
{
dCacheMsg.AnswerRecords.Add(new ARecord(aRecord.Name,
Convert.ToInt32((cacheEntity.Time.AddSeconds(item.TimeToLive) - DateTime.Now)
.TotalSeconds), aRecord.Address));
}
else if (item is AaaaRecord aaaaRecord)
{
dCacheMsg.AnswerRecords.Add(new AaaaRecord(aaaaRecord.Name,
Convert.ToInt32((cacheEntity.Time.AddSeconds(item.TimeToLive) - DateTime.Now)
.TotalSeconds), aaaaRecord.Address));
}
else if (item is CNameRecord cNameRecord)
{
dCacheMsg.AnswerRecords.Add(new CNameRecord(cNameRecord.Name,
Convert.ToInt32((cacheEntity.Time.AddSeconds(item.TimeToLive) - DateTime.Now)
.TotalSeconds), cNameRecord.CanonicalName));
}
else
{
dCacheMsg.AnswerRecords.Add(item);
}
}
dCacheMsg.Questions.AddRange(dnsQMessage.Questions);
dCacheMsg.AnswerRecords.Add(new TxtRecord(DomainName.Parse("cache.arashi-msg"), 0,
cacheEntity.ExpiresTime.ToString("r")));
return(dCacheMsg);
}
public static DnsMessage Get(DnsMessage dnsQMessage, HttpContext context = null)
{
var dCacheMsg = new DnsMessage
{
IsRecursionAllowed = true,
IsRecursionDesired = true,
TransactionID = dnsQMessage.TransactionID
};
if (context != null)
{
dCacheMsg.AnswerRecords.AddRange(Get(
$"{GeoIP.GetGeoStr(RealIP.GetFromDns(dnsQMessage, context))}{dnsQMessage.Questions.FirstOrDefault().Name}:{dnsQMessage.Questions.FirstOrDefault().RecordType}"));
}
else
{
dCacheMsg.AnswerRecords.AddRange(Get(
$"{dnsQMessage.Questions.FirstOrDefault().Name}:{dnsQMessage.Questions.FirstOrDefault().RecordType}"));
}
dCacheMsg.Questions.AddRange(dnsQMessage.Questions);
dCacheMsg.AnswerRecords.Add(new TxtRecord(DomainName.Parse("cache.doh.pp.ua"), 0,
"ArashiDNS.P Cached"));
return(dCacheMsg);
}
