private static void HandleDNSReq(string msg, Tunnel tunnel)
{
if (!string.IsNullOrEmpty(msg) && tunnel != null)
{
string[] args = msg.Split(' ');
if (args.Length >= 2)
{
string domain = args[1];
IPAddress ip;
if (dnsCaches.ContainsKey(domain))
{
if (!dnsCaches[domain].IsDead)
{
ip = dnsCaches[domain].IP;
}
else
{
ip = ResolvDNS(domain);
if (ip != null)
{
dnsCaches[domain].IP = ip;
}
}
}
else
{
ip = ResolvDNS(domain);
if (ip != null)
{
DnsCache cache = new DnsCache(domain, ip, Conf.DnsCacheTtl);
dnsCaches.TryAdd(cache.Domain, cache);
}
}
string reply;
if (ip == null)
{
reply = "nok";
}
else
{
reply = ip.ToString();
}
tunnel.WriteL(reply);
}
}
}
private static void SendDNSReq(EagleTunnelArgs e)
{
if (e != null)
{
if (e.Domain != null)
{
if (Conf.hosts.ContainsKey(e.Domain))
{
e.IP = Conf.hosts[e.Domain];
e.Success = true;
}
else
{
if (EagleTunnelHandler.dnsCaches.ContainsKey(e.Domain))
{
if (!EagleTunnelHandler.dnsCaches[e.Domain].IsDead)
{
e.IP = EagleTunnelHandler.dnsCaches[e.Domain].IP;
e.Success = true;
}
else
{
if (ResolvDomain(e))
{
EagleTunnelHandler.dnsCaches[e.Domain].IP = e.IP;
e.Success = true;
}
}
}
else
{
if (ResolvDomain(e))
{
DnsCache cache = new DnsCache(e.Domain, e.IP, Conf.DnsCacheTtl);
EagleTunnelHandler.dnsCaches.TryAdd(e.Domain, cache);
e.Success = true;
}
}
}
}
}
}
