private void dropClient(UserThread client)
{
client.Stop();
var disconnectPacket = new Packet(NetConstants.PacketTypes.UserLeft, client.GetBytes());
sendPacketToAllClients(disconnectPacket);
}
private void sendPacketToClient(Packet p, UserThread client)
{
if (client.StopCalled)
{
return;
}
try
{
var stream = client.TcpClient.GetStream();
stream.Write(p.Bytes, 0, p.TotalSize);
}
catch
{
dropClient(client);
}
}
private void handleIncomingPacket(UserThread sender, Packet packet)
{
int newOffset;
if (packet.PacketType == NetConstants.PacketTypes.UserRegister)
{
var registerString = PacketHelper.GetStringFromBytes(packet.DataBytes, 0, out newOffset);
if (registerString == NetConstants.UserRegisterString && !sender.IsRegistered)
{
var name = PacketHelper.GetStringFromBytes(packet.DataBytes, newOffset, out newOffset);
sender.Username = name;
sender.IsRegistered = true;
var joinPacket = PacketHelper.CreateUserJoinedPacket(sender);
sendPacketToAllClientsExcept(joinPacket, sender.UserGuid, true);
var clientsPacket = PacketHelper.CreateUsersAlreadyHerePacket(AllRegisteredClients);
//Send info of all clients already in lobby to new client
sendPacketToClient(clientsPacket, sender);
}
}
if (packet.PacketType == NetConstants.PacketTypes.UserLeft)
{
var leftPacket = PacketHelper.CreateUserLeftPacket(sender);
sendPacketToAllClientsExcept(leftPacket, sender.UserGuid, true);
}
if (packet.PacketType == NetConstants.PacketTypes.MemoryData && sender.IsRegistered)
{
//Add the clients Guid in front of the data
var newData = PacketHelper.ConcatBytes(sender.UserGuid.ToByteArray(), packet.DataBytes);
var newPacket = new Packet(NetConstants.PacketTypes.MemoryData, newData);
sendPacketToAllClientsExcept(newPacket, sender.UserGuid, true);
}
if (packet.PacketType == NetConstants.PacketTypes.UserChat)
{
var text = PacketHelper.GetStringFromBytes(packet.DataBytes, 0, out newOffset);
var chatPacket = PacketHelper.CreateServerToUserChatMessage(sender, text);
sendPacketToAllClients(chatPacket, true);
}
}
private void clientListenLoop(UserThread client)
{
var stream = client.TcpClient.GetStream();
var size = client.TcpClient.ReceiveBufferSize;
try
{
while (!client.StopCalled)
{
byte[] buffer = new byte[size];
stream.Read(buffer, 0, size);
handleIncomingPacket(client, new Packet(buffer));
}
}
catch (IOException)
{
//Stream was closed, most likely due to the server shutting down
client.Stop();
}
}
private void acceptIncomingConnections(TcpListener tcp)
{
while (!_stopCalled)
{
try
{
var client = tcp.AcceptTcpClient();
var clientThread = new UserThread(client);
var registerPacket = PacketHelper.CreateServerRegistrationPacket(clientThread.UserGuid);
sendPacketToClient(registerPacket, clientThread);
_clients.Add(clientThread);
clientThread.Start(clientListenLoop, clientStopped);
}
catch (SocketException)
{
break;
}
}
sendShutdownToAll();
}
public static Packet CreateServerToUserChatMessage(UserThread sender, string text)
{
var data = ConcatBytes(sender.GetBytes(), GetStringBytes(text));
return(new Packet(NetConstants.PacketTypes.ServerToUserChat, data));
}
public static Packet CreateUserLeftPacket(UserThread user)
{
return(new Packet(NetConstants.PacketTypes.UserLeft, user.GetBytes()));
}
private void clientStopped(UserThread client)
{
client.TcpClient.Close();
}
