sockscape/server/Socks/MasterUdpClient.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Sockets;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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using Glove;
using SockScape.Encryption;
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namespace SockScape {
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static class MasterUdpClient {
private static Key Key;
private static Cipher Encryptor;
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private static UdpClient Sock;
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private static Thread ListeningThread;
private static bool IsOpen;
private static DateTime LastMessageOut;
private static TimeSpan DeltaLastOut
=> DateTime.Now - LastMessageOut;
private static DateTime LastMessageIn = new DateTime(0);
private static TimeSpan DeltaLastIn
=> DateTime.Now - LastMessageIn;
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public static void Initialize() {
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if(IsOpen || ListeningThread != null)
return;
ushort port = (ushort)Configuration.General["Master Port"];
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Sock = new UdpClient(Configuration.General["Master Addr"], port);
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Key = new Key();
Encryptor = null;
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IsOpen = true;
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ListeningThread = new Thread(Listener);
ListeningThread.Start();
}
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public static void Listener() {
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while(IsOpen) {
if(LastMessageIn.Ticks == 0 && DeltaLastOut.TotalSeconds > 10)
Send(new Packet(kIntraSlaveId.InitiationAttempt, Configuration.General["Master Secret"]));
var endPoint = new IPEndPoint(0, 0);
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while(Sock.Available > 0) {
var data = Sock.Receive(ref endPoint);
LastMessageIn = DateTime.Now;
Packet packet =
Encryptor == null ? Packet.FromBytes(data)
: Packet.FromBytes(Encryptor.Parse(data));
switch((kIntraMasterId)packet.Id) {
case kIntraMasterId.KeyExchange:
var responsePacket = Key.ParseRequestPacket(packet);
Encryptor = new Cipher(Key.PrivateKey);
if(responsePacket != null)
Send(responsePacket);
else
LastMessageIn = new DateTime(0);
break;
}
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}
Thread.Sleep(1);
}
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}
public static void Send(Packet packet) {
var message = packet.GetBytes();
Sock.Send(message, message.Length);
LastMessageOut = DateTime.Now;
}
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public static void Close() {
IsOpen = false;
ListeningThread.Join();
ListeningThread = null;
}
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}
}