public static void BeginReadPacket(Socket skt, ClientProcessor psr, Action <Packet> callback, Action failure)
{
byte[] n = new byte[5];
skt.BeginReceive(n, 0, 5, 0, ar =>
{
try
{
byte[] x = (byte[])ar.AsyncState;
int len = IPAddress.NetworkToHostOrder(BitConverter.ToInt32(x, 0));
if (len == 0)
{
failure();
return;
}
len -= 5;
byte id = x[4];
Packet packet = Packets[(PacketID)id].CreateInstance();
byte[] content = new byte[len];
if (len > 0)
{
skt.Receive(content);
}
packet.Read(psr, new NReader(new MemoryStream(packet.Crypt(psr, content))));
callback(packet);
}
catch { failure(); }
}, n);
}
public static Packet ReadPacket(NReader rdr, ClientProcessor psr)
{
int len = rdr.ReadInt32() - 5;
byte id = rdr.ReadByte();
Packet packet = Packets[(PacketID)id].CreateInstance();
byte[] content = rdr.ReadBytes(len);
packet.Read(psr, new NReader(new MemoryStream(packet.Crypt(psr, content))));
return(packet);
}
private void IOCompleted(object sender, SocketAsyncEventArgs e)
{
try
{
bool repeat;
do
{
repeat = false;
if (e.SocketError != SocketError.Success)
{
throw new SocketException((int)e.SocketError);
}
if (e.LastOperation == SocketAsyncOperation.Receive)
{
switch (receiveState)
{
case ReceiveState.ReceivingHdr:
if (debug)
{
Console.WriteLine(@"test");
}
if (e.BytesTransferred < 5)
{
parent.Disconnect();
return;
}
if (debug)
{
Console.WriteLine(@"test2");
}
if (e.Buffer[0] == 0x3c && e.Buffer[1] == 0x70 &&
e.Buffer[2] == 0x6f && e.Buffer[3] == 0x6c && e.Buffer[4] == 0x69)
{
ProcessPolicyFile();
return;
}
int len = (e.UserToken as ReceiveToken).Length =
IPAddress.NetworkToHostOrder(BitConverter.ToInt32(e.Buffer, 0)) - 5;
if (len < 0 || len > BUFFER_SIZE)
{
throw new InternalBufferOverflowException();
}
(e.UserToken as ReceiveToken).Packet =
Packet.Packets[(PacketID)e.Buffer[4]].CreateInstance();
if (debug)
{
Console.WriteLine("test3 - " + (e.UserToken as ReceiveToken).Packet.GetType().Name);
}
receiveState = ReceiveState.ReceivingBody;
e.SetBuffer(0, len);
if (!skt.ReceiveAsync(e))
{
repeat = true;
}
break;
case ReceiveState.ReceivingBody:
if (e.BytesTransferred < (e.UserToken as ReceiveToken).Length)
{
parent.Disconnect();
return;
}
Packet pkt = (e.UserToken as ReceiveToken).Packet;
pkt.Read(parent, e.Buffer, (e.UserToken as ReceiveToken).Length);
receiveState = ReceiveState.Processing;
bool cont = OnPacketReceived(pkt);
if (cont && skt.Connected)
{
receiveState = ReceiveState.ReceivingHdr;
e.SetBuffer(0, 5);
if (!skt.ReceiveAsync(e))
{
repeat = true;
}
}
break;
default:
throw new InvalidOperationException(e.LastOperation.ToString());
}
}
else if (e.LastOperation == SocketAsyncOperation.Send)
{
switch (sendState)
{
case SendState.Ready:
byte[] dat = (e.UserToken as SendToken).Packet.Write(parent);
sendState = SendState.Sending;
e.SetBuffer(dat, 0, dat.Length);
if (!skt.SendAsync(e))
{
repeat = true;
}
break;
case SendState.Sending:
(e.UserToken as SendToken).Packet = null;
if (CanSendPacket(e, true))
{
repeat = true;
}
break;
default:
throw new InvalidOperationException(e.LastOperation.ToString());
}
}
else
{
throw new InvalidOperationException(e.LastOperation.ToString());
}
} while (repeat);
}
catch (Exception ex)
{
OnError(ex);
}
}