DNSEntity CheckRecord(DNSEntity dns)
{
var rq = dns.Questions[0];
var list = Record.FindAllByQueryTypeAndName((Int32)rq.Type, rq.Name);
if (list == null || list.Count == 0)
{
return(null);
}
var rs = new DNSEntity();
rs.Questions = dns.Questions;
var drs = new List <DNSRecord>();
var now = DateTime.Now;
foreach (var item in list)
{
if (item.QueryType <= 0)
{
continue;
}
var dr = DNSEntity.CreateRecord((DNSQueryType)item.QueryType);
dr.Name = item.Name;
dr.Text = item.Address;
// 生产时间过期，并且最后更新时间也过期，才去更新
if (item.TTL < now && item.Next < now)
{
// 生存时间3分钟
dr.TTL = new TimeSpan(0, 3, 0);
// 更新数据库记录，3分钟内不要再次去找
item.Next = now.AddMinutes(3);
item.Hits++;
item.SaveAsync();
}
else
{
dr.TTL = item.TTL - now;
if (dr.TTL.TotalSeconds < 60)
{
dr.TTL = new TimeSpan(0, 10, 0);
}
drs.Add(dr);
}
}
// 没有任何满足条件的返回，让它去更新吧
if (drs.Count < 1)
{
return(null);
}
rs.Answers = drs.ToArray();
return(rs);
}
DNSEntity CheckRule(DNSEntity dns)
{
var rq = dns.Questions[0];
var list = Rule.FindAllByQueryTypeAndName((Int32)rq.Type, rq.Name);
if (list == null || list.Count == 0)
{
return(null);
}
var rs = new DNSEntity();
rs.Questions = dns.Questions;
var drs = new List <DNSRecord>();
foreach (var item in list)
{
if (item.QueryType <= 0)
{
continue;
}
var r = DNSEntity.CreateRecord((DNSQueryType)item.QueryType);
r.Name = item.Name;
if (r.Name[0] == '*')
{
r.Name = r.Name.Substring(1);
}
if (r.Name[0] == '.')
{
r.Name = r.Name.Substring(1);
}
r.Text = item.Address;
// 生存时间3分钟
r.TTL = new TimeSpan(0, 3, 0);
drs.Add(r);
item.Hits++;
item.SaveAsync();
}
rs.Answers = drs.ToArray();
return(rs);
}
