/* Instance management */
public void Read(BinaryReader br)
{
name = DNS.ReadName(br);
qtype = br.ReadUInt16();
qclass = br.ReadUInt16();
ntoh();
}
/* Instance management */
public void Read(BinaryReader br)
{
name = DNS.ReadName(br);
atype = br.ReadUInt16();
aclass = br.ReadUInt16();
ttl = br.ReadUInt32();
rdlen = br.ReadUInt16();
ntoh();
rdata = br.ReadBytes((int)rdlen);
}
public static void Run()
{
UdpClient udpClient = new UdpClient();
udpClient.EnableBroadcast = true;
IPEndPoint recv_groupep = new IPEndPoint(IPAddress.Any, _P2P_PORT);
udpClient.Client.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
udpClient.ExclusiveAddressUse = false;
udpClient.Client.Bind(recv_groupep);
while (true)
{
IPEndPoint recv_ipep = null;
try
{
byte[] packet = udpClient.Receive(ref recv_ipep);
MemoryStream ms = new MemoryStream(packet);
BinaryReader br = new BinaryReader(ms);
UInt32 id = br.ReadUInt32();
byte isRequest = br.ReadByte();
if (isRequest == 1)
{
string name = DNS.ReadName(br);
DNScache.clean();
lock (DNScache._lock_cache)
{
if (DNScache._cache.ContainsKey(name))
{
MemoryStream ms_res = new MemoryStream();
BinaryWriter bw = new BinaryWriter(ms_res);
bw.Write(id);
bw.Write((byte)0);
DNScache.cache_entry ce = DNScache._cache[name];
if (ce.success)
{
bw.Write((byte)1);
UInt32 ttl = (UInt32)((ce.expiry - DateTime.Now).TotalSeconds);
bw.Write((UInt32)IPAddress.HostToNetworkOrder((int)ttl));
bw.Write(ce.address, 0, 4);
}
else
{
bw.Write((byte)0);
UInt32 ttl = (UInt32)((ce.expiry - DateTime.Now).TotalSeconds);
bw.Write((UInt32)IPAddress.HostToNetworkOrder((int)ttl));
bw.Write((byte)0);
bw.Write((byte)0);
bw.Write((byte)0);
bw.Write((byte)0);
}
byte[] packet_res = ms_res.ToArray();
udpClient.Send(packet_res, packet_res.Length, recv_ipep);
}
}
}
} catch (ThreadInterruptedException ex) {
return;
}
}
}
