private void ListenClient(System.IAsyncResult ar)
{
Socket _listener = (Socket)ar.AsyncState;
Socket client = null;
try
{
client = _listener.EndAccept(ar);
_listener.BeginAccept(ListenClient, _listener);
}
catch (Exception e)
{
DebugMessage(e.ToString());
}
if (client != null)
{
#region Set def var
int defReadTimeout = client.ReceiveTimeout;
#endregion
#region Set Read func
SendData onRead(PacketType checkType, string key, Func <SendData, bool> datacheck)
{
SendData ReadData = new SendData();
try
{
client.ReceiveTimeout = 1000;
byte[] data = new byte[Packet.header_length];
if (client.Receive(data) <= 0)
{
Disconnect(client);
return(new SendData());
}
client.ReceiveTimeout = defReadTimeout;
int len = BitConverter.ToInt32(data, 0);
data = ReadSocketData(len, client);
using (Packet packet = new Packet(client, data, null, true))
{
if (packet.BeginRead() != checkType)
{
Disconnect(client);
return(new SendData());
}
ReadData = packet.ReadSendData(key);
}
}
catch (Exception)
{
Disconnect(client);
return(new SendData());
}
if (!datacheck(ReadData))
{
Disconnect(client);
return(new SendData());
}
return(ReadData);
}
#endregion
#region Set Send func
void onSend(PacketType sendType, string key, EncryptAndCompress.LockType lockType, SendData send)
{
using (Packet packet = new Packet(client))
{
packet.BeginWrite(sendType);
packet.WriteSendData(send, key, lockType);
Send(packet, client);
}
}
#endregion
#region Send RSA key
onSend(PacketType.RSAKEY, "", EncryptAndCompress.LockType.None, new SendData(0, RSAkey.PublicKeyBytes));
#endregion
#region Get AES key
SendData sendData = onRead(PacketType.AESKEY, RSAkey.PrivateKey, (a) => true);
if (sendData == new SendData())
{
return;
}
string AESkey = (string)sendData.Parameters;
#endregion
#region Send AES Check
onSend(PacketType.AESKEY, AESkey, EncryptAndCompress.LockType.AES, new SendData(0, "Connect check"));
#endregion
#region Get CONNECT_SUCCESSFUL
sendData = onRead(PacketType.CONNECT_SUCCESSFUL, AESkey, (a) => a.Parameters.ToString() == "Connect successful");
if (sendData == new SendData())
{
return;
}
#endregion
#region On CONNECT
PushPacket(PacketType.CONNECT_SUCCESSFUL, AESkey, client);
byte[] bytes = new byte[Packet.header_length];
client.BeginReceive(bytes, 0, Packet.header_length, SocketFlags.None, Receive, new object[] { client, bytes });
#endregion
}
}
private void Receive(IAsyncResult ar)
{
object[] state = (object[])ar.AsyncState;
Socket client = (Socket)state[0];
byte[] data = (byte[])state[1];
PacketType msgid = (PacketType)(-1);
Packet packet = null;
try
{
int len = client.EndReceive(ar);
if (!SocketList.Contains(ToPeer[SocketToEndPoint[client]]))
{
PushPacket(PacketType.CONNECTION_LOST, "連線已關閉", client);
return;
}
// 伺服器斷開連接
if (len < 1)
{
PushPacket(PacketType.CONNECTION_LOST, "遠端已斷線", client);
return;
}
byte[] databody = ReadSocketData(BitConverter.ToInt32(data, 0), client);
packet = new Packet(client, databody, null, true);
msgid = packet.BeginRead();
packet.ResetPosition();
if (data.Length != Packet.header_length)
{
data = new byte[Packet.header_length];
}
client.BeginReceive(data, 0, Packet.header_length, SocketFlags.None, Receive, new object[] { client, data });
}
catch (Exception e)
{
PushPacket(PacketType.CONNECTION_LOST, e.ToString(), client);
return;
}
if (msgid > PacketType.SendAllowTypeTop && msgid < PacketType.SendAllowTypeEnd)
{
PushPacket(packet);
}
else
{
switch (msgid)
{
case PacketType.CONNECTION_LOST:
{
packet.BeginRead();
SendData sendData = packet.ReadSendData("");
PushPacket(PacketType.CONNECTION_LOST, sendData.DebugMessage, client);
packet.CloseStream();
break;
}
case PacketType.ClientDebugMessage:
{
packet.BeginRead();
SendData sendData = packet.ReadSendData(SocketToKey[packet.peer]);
DebugMessage("ClientDebugMessage:" + packet.peer.ToString() + " " + sendData.DebugMessage);
packet.CloseStream();
break;
}
default:
{
PushPacket(PacketType.CONNECTION_LOST, "不正確的標頭資訊 Receive", client);
packet.CloseStream();
break;
}
}
}
}
