private UserInfo userInfoFromBytes(byte[] buffer, int offset, out int newOffset)
{
newOffset = offset;
var guid = guidFromBytes(buffer, newOffset, out newOffset);
var name = PacketHelper.GetStringFromBytes(buffer, newOffset, out newOffset);
return(new UserInfo(name, guid));
}
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 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();
}
private void handleIncomingPacket(Packet packet)
{
int newOffset;
if (packet.PacketType == NetConstants.PacketTypes.ServerRegister)
{
if (packet.DataSize == 0)
{
return;
}
var text = PacketHelper.GetStringFromBytes(packet.DataBytes, 0, out newOffset);
if (text == NetConstants.ServerRegisterString)
{
var guidBytes = new byte[16];
Array.Copy(packet.DataBytes, newOffset, guidBytes, 0, 16);
var guid = new Guid(guidBytes);
ClientGuid = guid;
var registerPacket = PacketHelper.CreateUserRegistrationPacket(Nickname);
SendPacketToServer(registerPacket);
}
else
{
onDisconnected("Invalid server response");
Disconnect();
}
}
if (packet.PacketType == NetConstants.PacketTypes.UserJoined)
{
newOffset = 0;
addClient(userInfoFromBytes(packet.DataBytes, newOffset, out newOffset));
}
if (packet.PacketType == NetConstants.PacketTypes.UserLeft)
{
newOffset = 0;
var incomingUser = userInfoFromBytes(packet.DataBytes, newOffset, out newOffset);
var user = getUserInfoFromGuid(incomingUser.Guid);
removeClient(user);
}
if (packet.PacketType == NetConstants.PacketTypes.UserAlreadyHere)
{
var numClients = BitConverter.ToInt32(packet.DataBytes, 0);
newOffset = 4;
for (int i = 0; i < numClients; ++i)
{
addClient(userInfoFromBytes(packet.DataBytes, newOffset, out newOffset));
}
}
if (packet.PacketType == NetConstants.PacketTypes.ServerShutdown)
{
onDisconnected("Server shut down");
Disconnect();
}
if (packet.PacketType == NetConstants.PacketTypes.MemoryData)
{
var guid = guidFromBytes(packet.DataBytes, 0, out newOffset);
var user = getUserInfoFromGuid(guid);
//Don't accept memory changed packets from ourselves
if (user != null && user.Guid != ClientGuid && user.Approved)
{
var memorySize = packet.DataSize - newOffset;
var memoryBytes = new byte[memorySize];
Array.Copy(packet.DataBytes, newOffset, memoryBytes, 0, memorySize);
var memoryData = ChangedDataFactory.BuildChangedData(memoryBytes);
onIncomingData(new IncomingMemoryData(user, memoryData));
}
}
if (packet.PacketType == NetConstants.PacketTypes.ServerToUserChat)
{
var incomingUser = userInfoFromBytes(packet.DataBytes, 0, out newOffset);
//Use the local user if available
var user = getUserInfoFromGuid(incomingUser.Guid) ?? incomingUser;
var text = PacketHelper.GetStringFromBytes(packet.DataBytes, newOffset, out newOffset);
onIncomingData(new ChatData(user, text));
}
}
public byte[] GetBytes()
{
return(PacketHelper.ConcatBytes(UserGuid.ToByteArray(), PacketHelper.GetStringBytes(Username)));
}