private void ReceiveCallback(IAsyncResult target)
{
Logger.WriteLine("--- ReceiveCallback");
Message.MessageType requestType = Message.MessageType.Unknown;
Socket handler = null;
try
{
object[] obj = new object[2];
obj = (object[])target.AsyncState;
byte[] buffer = (byte[]) obj[0];
handler = (Socket) obj[1];
Logger.WriteLine("ReceiveCallback from " + (handler.RemoteEndPoint as IPEndPoint).Address + ":" + (handler.RemoteEndPoint as IPEndPoint).Port);
bool quit = false;
int bytesRead = handler.EndReceive(target);
if (bytesRead > 0)
{
Message request = new Message(buffer);
Message response;
requestType = request.GetMessageType();
if (requestType == Message.MessageType.HandshakePeerCreator) // Peer client mau join ke room ini
{
#region Handshake
Logger.WriteLine("HandshakePeerCreator");
if (Room.Members.Count < Room.MaxPlayer)
{
int newPeerId, newPeerListenPort;
IPAddress newPeerIp = (handler.RemoteEndPoint as IPEndPoint).Address;
request.GetHandshakePeerCreator(out newPeerId, out newPeerListenPort);
Room.Members.Add(new Peer(newPeerId, newPeerIp, newPeerListenPort));
Logger.WriteLine("Peer ID : " + newPeerId);
Logger.WriteLine("Peer IP : " + newPeerIp + ":" + newPeerListenPort);
// Send SUCCESS message
response = Message.CreateMessageSuccess();
handler.Send(response.data, 0, response.data.Length, SocketFlags.None);
if (nextPeerSocket != null)
{
Logger.WriteLine("Sending NEW MEMBER to nextPeerSocket: " + (nextPeerSocket.RemoteEndPoint as IPEndPoint).Address + ":" + (nextPeerSocket.RemoteEndPoint as IPEndPoint).Port);
// Send NewMember message to next peer
response = Message.CreateMessageNewMember(newPeerId, (handler.RemoteEndPoint as IPEndPoint).Address, newPeerListenPort);
nextPeerSocket.Send(response.data, 0, response.data.Length, SocketFlags.None);
}
else
{
IPEndPoint ipEndPoint = new IPEndPoint(newPeerIp, newPeerListenPort);
nextPeerSocket = new Socket(
newPeerIp.AddressFamily,
SocketType.Stream,
ProtocolType.Tcp
);
nextPeerSocket.NoDelay = false;
nextPeerSocket.Connect(ipEndPoint);
Logger.WriteLine("Setting up nextPeerSocket to " + (nextPeerSocket.RemoteEndPoint as IPEndPoint).Address + ":" + (nextPeerSocket.RemoteEndPoint as IPEndPoint).Port);
response = Message.CreateMessageRoomModel(Room);
nextPeerSocket.Send(response.data, 0, response.data.Length, SocketFlags.None);
Logger.WriteLine("Send room info");
keepAliveRoom = new Thread(new ThreadStart(SendAliveNextPeer));
keepAliveRoom.Start();
}
response = Message.CreateMessageAdd(newPeerId, Room.RoomId);
lock (trackerPaddle)
{
trackerSocket.Send(response.data, 0, response.data.Length, SocketFlags.None);
byte[] bufferRecv = new byte[1024];
trackerSocket.Receive(bufferRecv, 0, bufferRecv.Length, SocketFlags.None);
}
}
else
{
Logger.WriteLine("Send FAILED: Room penuh");
// Send FAILED message akibat ruang penuh
response = Message.CreateMessageFailed();
handler.Send(response.data, 0, response.data.Length, SocketFlags.None);
handler.Close();
quit = true;
}
#endregion
}
else if (requestType == Message.MessageType.KeepAlive)
{
#region Keep Alive
int peerId;
request.GetKeepAlive(out peerId);
Peer peer = Room.Members.Find(fpeer => fpeer.PeerId == peerId);
if (peer != null)
{
//Send KeepAlive Message back
response = request;
handler.Send(response.data, 0, response.data.Length, SocketFlags.None);
}
else
{
response = Message.CreateMessageFailed();
handler.Send(response.data, 0, response.data.Length, SocketFlags.None);
}
#endregion
}
else if (requestType == Message.MessageType.NewMember)
{
#region NewMember
Logger.WriteLine("NewMember");
if (IsCreator)
{
Logger.WriteLine("NewMember has been received by peer creator");
Logger.WriteLine("Closing connection from " + (handler.RemoteEndPoint as IPEndPoint).Address + ":" + (handler.RemoteEndPoint as IPEndPoint).Port);
handler.Close();
quit = true;
}
else
{
bool isLast = Room.Members.Last().PeerId == PeerId;
int newPeerId, newPeerListenPort;
IPAddress newPeerIp;
request.GetNewMember(out newPeerId, out newPeerIp, out newPeerListenPort);
Room.Members.Add(new Peer(newPeerId, newPeerIp, newPeerListenPort));
Logger.WriteLine("Sending NEW MEMBER to nextPeerSocket: " + (nextPeerSocket.RemoteEndPoint as IPEndPoint).Address + ":" + (nextPeerSocket.RemoteEndPoint as IPEndPoint).Port);
response = request;
nextPeerSocket.Send(response.data, 0, response.data.Length, SocketFlags.None);
if (isLast)
{
Logger.WriteLine("Closing connection " + (nextPeerSocket.RemoteEndPoint as IPEndPoint).Address + ":" + (nextPeerSocket.RemoteEndPoint as IPEndPoint).Port);
nextPeerSocket.Close();
IPEndPoint ipEndPoint = new IPEndPoint(newPeerIp, newPeerListenPort);
nextPeerSocket = new Socket(
newPeerIp.AddressFamily,
SocketType.Stream,
ProtocolType.Tcp
);
nextPeerSocket.NoDelay = false;
nextPeerSocket.Connect(ipEndPoint);
Logger.WriteLine("Setting up nextPeerSocket to " + (nextPeerSocket.RemoteEndPoint as IPEndPoint).Address + ":" + (nextPeerSocket.RemoteEndPoint as IPEndPoint).Port);
response = Message.CreateMessageRoomModel(Room);
nextPeerSocket.Send(response.data, 0, response.data.Length, SocketFlags.None);
Logger.WriteLine("Send room info");
}
}
#endregion
}
else if (requestType == Message.MessageType.RoomModel)
{
#region Room
Logger.WriteLine("RoomModel");
Room room;
request.GetRoomModel(out room);
Room = room;
#endregion
}
else if (requestType == Message.MessageType.Quit)
{
int peerId;
request.GetQuit(out peerId);
Peer peer = Room.Members.Find(fpeer => fpeer.PeerId == peerId);
byte[] bufferRecv;
if (Room.Members.Count != 2)
{
if (PeerId == peerId)
{
Logger.WriteLine("Quit done");
}
else
{
int i = 0;
for (; i < Room.Members.Count; i++)
{// i adalah indeks peer yang ingin quit
if (Room.Members[i].PeerId == peerId)
{
break;
}
}
int j = 0;
for (; j < Room.Members.Count; j++)
{// j adalah indeks current peer
if (Room.Members[j].PeerId == PeerId)
{
break;
}
}
if (j == i + 1 || (j == 0 && i == Room.Members.Count - 1)) // yg mau quit adalah peer sebelum current peer
{
quit = true;
}
response = request;
lock (nextPeerPaddle)
{
nextPeerSocket.Send(response.data, 0, response.data.Length, SocketFlags.None);
Logger.WriteLine("Forward Quit to " + (nextPeerSocket.RemoteEndPoint as IPEndPoint).Address);
bufferRecv = new byte[1024];
nextPeerSocket.Receive(bufferRecv, 0, bufferRecv.Length, SocketFlags.None);
}
if (i == j + 1 || (i == 0 && j == Room.Members.Count - 1))// yg mau quit adalah peer setelah current peer
{
nextPeerSocket.Close();
IPAddress ip = Room.Members[(i + 1) % (Room.Members.Count - 1)].IPAddress;
IPEndPoint ipEndPoint = new IPEndPoint(ip, Room.Members[(i + 1) % (Room.Members.Count - 1)].ListeningPort);
nextPeerSocket = new Socket(
ip.AddressFamily,
SocketType.Stream,
ProtocolType.Tcp
);
nextPeerSocket.NoDelay = false;
nextPeerSocket.Connect(ipEndPoint);
nextPeerSocket = null;
}
if (this.PeerId == Room.Creator.PeerId || (peerId == Room.Creator.PeerId && Room.Members[1].PeerId == this.PeerId))
{
lock (trackerPaddle)
{
response = Message.CreateMessageRemove(peerId, PeerId, Configuration.ListenPort, Room.RoomId);
trackerSocket.Send(response.data, 0, response.data.Length, SocketFlags.None);
bufferRecv = new byte[1024];
trackerSocket.Receive(bufferRecv, 0, bufferRecv.Length, SocketFlags.None);
}
}
if (peerId == Room.Creator.PeerId)
{
Room.Creator = Room.Members[1];
}
response = Message.CreateMessageSuccess();
handler.Send(response.data, 0, response.data.Length, SocketFlags.None);
bufferRecv = new byte[1024];
nextPeerSocket.Receive(bufferRecv, 0, bufferRecv.Length, SocketFlags.None);
}
}
else
{
lock (trackerPaddle)
{
response = Message.CreateMessageRemove(peerId, PeerId, Configuration.ListenPort, Room.RoomId);
trackerSocket.Send(response.data, 0, response.data.Length, SocketFlags.None);
bufferRecv = new byte[1024];
trackerSocket.Receive(bufferRecv, 0, bufferRecv.Length, SocketFlags.None);
}
}
Room.Members.Remove(peer);
}
else if (requestType == Message.MessageType.Start)
{
#region Start
Logger.WriteLine("Start");
int peerId;
string roomId;
request.GetStart(out peerId, out roomId);
Logger.WriteLine("Received START message with PeerId : " + peerId + " RoomId : " + roomId);
if (peerId == PeerId)
{
// do nothing
Logger.WriteLine("FINISHED");
}
else
{
// Send NewMember message to next peer
response = request;
nextPeerSocket.Send(response.data, 0, response.data.Length, SocketFlags.None);
Logger.WriteLine("Forward START to " + (nextPeerSocket.RemoteEndPoint as IPEndPoint).Address);
}
}
else
{
Logger.WriteLine("Listener receive unknown message");
// Send FAILED message akibat ruang penuh
response = Message.CreateMessageFailed();
handler.Send(response.data, 0, response.data.Length, SocketFlags.None);
}
#endregion
}
if (!quit)
{
IAsyncResult nextAsyncResult = handler.BeginReceive(
buffer,
0,
buffer.Length,
SocketFlags.None,
new AsyncCallback(ReceiveCallback),
obj
);
if (!nextAsyncResult.AsyncWaitHandle.WaitOne(Configuration.MaxTimeout))
{
Logger.WriteLine("Connection timeout for peer with IP Address " + (handler.LocalEndPoint as IPEndPoint).Address + ":" + (handler.LocalEndPoint as IPEndPoint).Port + " -> " + (handler.RemoteEndPoint as IPEndPoint).Address + ":" + (handler.RemoteEndPoint as IPEndPoint).Port);
Logger.WriteLine("Closing connection " + (handler.RemoteEndPoint as IPEndPoint).Address + ":" + (handler.RemoteEndPoint as IPEndPoint).Port);
handler.Close();
}
}
}
catch (SocketException exc)
{
Logger.WriteLine(exc);
if (exc.SocketErrorCode == SocketError.HostDown || exc.SocketErrorCode == SocketError.ConnectionReset)
{
if (Room.Members.Count > 2)
{
int index = -1;
for (int i = 0; i < Room.Members.Count; i++)
{
Peer p = Room.Members[i];
if (p.IPAddress.Equals((handler.LocalEndPoint as IPEndPoint).Address))
{
index = i;
}
}
if (index == 0)
{
index = Room.Members.Count - 2;
}
else
{
index--;
}
Peer backPeer = Room.Members[index];
byte[] buffer = new byte[1024];
Message request = Message.CreateMessageQuit(backPeer.PeerId);
lock (nextPeerPaddle)
{
nextPeerSocket.Send(request.data, 0, request.data.Length, SocketFlags.None);
nextPeerSocket.Receive(buffer, 0, buffer.Length, SocketFlags.None);
}
}
else
{
// Remove last element
Room.Members.RemoveAt(1);
lock (nextPeerPaddle)
{
nextPeerSocket = null;
}
}
}
}
Logger.WriteLine();
}
public bool CreateRoom(string roomId, int maxPlayers)
{
try
{
if (IsConnected && !IsInRoom)
{
Logger.WriteLine("Requesting to create room");
byte[] buffer = new byte[1024];
Message request = Message.CreateMessageCreate(PeerId, maxPlayers, roomId, Configuration.ListenPort);
lock (trackerPaddle)
{
trackerSocket.Send(request.data, 0, request.data.Length, SocketFlags.None);
trackerSocket.Receive(buffer, buffer.Length, SocketFlags.None);
}
Message response = new Message(buffer);
Message.MessageType responseType = response.GetMessageType();
if (responseType == Message.MessageType.Success)
{
Logger.WriteLine("Request create room success: " + roomId);
Room = new Room(roomId, new Peer(PeerId, (trackerSocket.LocalEndPoint as IPEndPoint).Address, Configuration.ListenPort), maxPlayers);
Room.Members.Add(Room.Creator);
IsInRoom = true;
IsCreator = true;
return true;
}
else if (responseType == Message.MessageType.Failed)
{
Logger.WriteLine("Request create room failed.");
return false;
}
else
{
Logger.WriteLine("Response unrecognized.");
return false;
}
}
else if (!IsConnected)
{
Logger.WriteLine("Not connected to tracker, connect to tracker first.");
return false;
}
else if (IsInRoom)
{
Logger.WriteLine("Currently in room, quit room first.");
return false;
}
else
{
Logger.WriteLine("Unknown error.");
return false;
}
}
catch (Exception exc)
{
Logger.WriteLine(exc);
return false;
}
}