public void SendLIST(NetworkStream stream, HashSet <User> users)
{
string listResponse = EnumCaster.MessageTypeToString(MessageType);
foreach (User u in users)
{
if (u.Status == UserStatus.Available)
{
listResponse += ":" + u.Name;
}
}
Send(stream, listResponse);
}
public void SendHANG(NetworkStream stream)
{
string hang = EnumCaster.MessageTypeToString(MessageType);
Send(stream, hang);
}
public void SendCONN(NetworkStream stream, HashSet <User> users)
{
string confirm = EnumCaster.MessageTypeToString(MessageType) + ":" + Informations[0] + ":" + GetUserIPAddress(Informations[0], users) + ":" + Informations[1];
Send(stream, confirm);
}
public void SendDENY(NetworkStream stream)
{
string deny = EnumCaster.MessageTypeToString(MessageType) + ":" + Informations[0] + ":" + Informations[1];
Send(stream, deny);
}
public void SendCALL(NetworkStream stream, HashSet <User> users)
{
string call = EnumCaster.MessageTypeToString(MessageType) + ":" + Informations[0] + ":" + Informations[1] + ":" + GetUserIPAddress(Informations[1], users) + ":" + Informations[2];
Send(stream, call);
}
protected override void BeginDataTransmission(NetworkStream stream)
{
byte[] buffer = new byte[1024];
string portResponse = "PORT:";
string decline = "NACK";
Message msg;
string name = "";
bool running = true;
byte[] declineByte = new ASCIIEncoding().GetBytes(decline);
while (running)
{
var data = GetData(stream, buffer);
if (data != null)
{
if (data[0] == "HELL")
{
if (data.Length < 4)
{
Console.WriteLine("Invalid data: HELL");
stream.Write(declineByte, 0, declineByte.Length);
}
else
{
User u = new User(data[3], data[1], UserStatus.Available, stream);
Console.WriteLine(u.Name + " connected");
lock (usersLock)
{
users.Add(u);
}
name = u.Name;
int portNumber = FreeTcpPort();
portResponse += portNumber.ToString();
byte[] portResponseByte = new ASCIIEncoding().GetBytes(portResponse);
stream.Write(portResponseByte, 0, portResponseByte.Length);
portResponse = "PORT:";
msg = new Message(null, MessageType.LIST);
lock (messagesLock)
{
messages.Add(msg);
}
}
}
else if (data[0] == "CALL")
{
if (data.Length < 4)
{
Console.WriteLine("Invalid data: CALL");
stream.Write(declineByte, 0, declineByte.Length);
}
else
{
msg = new Message(data.Skip(1).ToArray(), EnumCaster.MessageTypeFromString(data[0]));
lock (messagesLock)
{
messages.Add(msg);
}
}
}
else if (data[0] == "CONN")
{
if (data.Length < 3)
{
Console.WriteLine("Invalid data: CONN");
stream.Write(declineByte, 0, declineByte.Length);
}
else
{
lock (usersLock)
{
foreach (User user in users)
{
if (user.Name == data[1] || user.Name == name)
{
user.Status = UserStatus.Busy;
}
}
}
lock (messagesLock)
{
msg = new Message(data.Skip(1).ToArray(), EnumCaster.MessageTypeFromString(data[0]));
messages.Add(msg);
msg = new Message(null, MessageType.LIST);
messages.Add(msg);
}
}
}
else if (data[0] == "DENY")
{
if (data.Length < 3)
{
Console.WriteLine("Invalid data: DENY");
stream.Write(declineByte, 0, declineByte.Length);
}
else
{
msg = new Message(data.Skip(1).ToArray(), EnumCaster.MessageTypeFromString(data[0]));
lock (messagesLock)
{
messages.Add(msg);
}
}
}
else if (data[0] == "LIST")
{
if (data.Length < 2)
{
Console.WriteLine("Invalid data: LIST");
stream.Write(declineByte, 0, declineByte.Length);
}
else
{
msg = new Message(null, EnumCaster.MessageTypeFromString(data[0]));
msg.SendLIST(stream, users);
}
}
else if (data[0] == "HANG")
{
if (data.Length < 3)
{
Console.WriteLine("Invalid data: HANG");
stream.Write(declineByte, 0, declineByte.Length);
}
else
{
lock (usersLock)
{
foreach (User user in users)
{
if (user.Name == data[1] || user.Name == data[2])
{
user.Status = UserStatus.Available;
}
}
}
lock (messagesLock)
{
msg = new Message(data.Skip(1).ToArray(), EnumCaster.MessageTypeFromString(data[0]));
messages.Add(msg);
msg = new Message(null, MessageType.LIST);
messages.Add(msg);
}
}
}
else if (data[0] == "EXIT")
{
if (data.Length < 2)
{
Console.WriteLine("Invalid data: EXIT");
stream.Write(declineByte, 0, declineByte.Length);
}
else
{
lock (usersLock)
{
foreach (User user in users)
{
if (user.Name == data[1])
{
users.Remove(user);
msg = new Message(null, MessageType.LIST);
lock (messagesLock)
{
messages.Add(msg);
}
break;
}
}
}
Console.WriteLine(name + " disconnected");
running = false;
}
}
}
lock (messagesLock)
{
var listUpdates = messages.Where(x => x.MessageType == MessageType.LIST);
if (listUpdates.Count() != 0)
{
Message tmp = listUpdates.First();
foreach (User user in users)
{
tmp.SendLIST(user.UserStream, users);
}
messages.Remove(tmp);
}
}
lock (messagesLock)
{
var calls = messages.Where(x => x.MessageType == MessageType.CALL && x.Informations[0] == name);
if (calls.Count() != 0)
{
//CALL:KEY:VALUE
Message temp = calls.First();
temp.SendCALL(stream, users);
messages.Remove(temp);
}
}
lock (messagesLock)
{
var conns = messages.Where(x => x.MessageType == MessageType.CONN && x.Informations[0] == name);
if (conns.Count() != 0)
{
//CONN:NAME:IP:PORT
Message temp = conns.First();
temp.SendCONN(stream, users);
messages.Remove(temp);
}
}
lock (messagesLock)
{
var denys = messages.Where(x => x.MessageType == MessageType.DENY && x.Informations[0] == name);
if (denys.Count() != 0)
{
//DENY:NAME_TO:NAME_FROM
Message temp = denys.First();
temp.SendDENY(stream);
messages.Remove(temp);
}
}
lock (messagesLock)
{
var hangs = messages.Where(x => x.MessageType == MessageType.HANG && x.Informations[1] == name);
if (hangs.Count() != 0)
{
//HANG:NAME_FROM:NAME_TO
Message temp = hangs.First();
temp.SendHANG(stream);
messages.Remove(temp);
foreach (User user in users)
{
if (user.Name == name)
{
user.Status = UserStatus.Available;
}
}
}
}
}
}
