private void waitforClientConnection()
{
Byte[] ipAddr = new Byte[4];
// ipAddr[0] = 127; ipAddr[1] = 0; ipAddr[2] = 0; ipAddr[3] = 1;
IPAddress ipAddress = new IPAddress(ipAddr);
IPEndPoint listenerPort = new IPEndPoint(IPAddress.Any, 30000);
listener = new TcpListener(listenerPort);
listener.Start();
try
{
while (true)
{
connection = listener.AcceptSocket(); //blocking call - will wait for a connection request
// MessageBox.Show("Connection Accepted");
connectedUser newConnection = new connectedUser();
userSockets.Add(new connectedUser
{
userSocket = connection,
commStream = new NetworkStream(connection),
Connected = true,
ID = userId++
});
communicationThreads.Add(new Thread(new ParameterizedThreadStart(commProcedure)));
communicationThreads[communicationThreads.Count - 1].Start(userSockets[userSockets.Count - 1]);
}
}
catch (SocketException sockExcep)
{
listener = null;
}
}
private void commProcedure(object obj) //should only be passing in userSockets
{
connectedUser curUser = null;
if (obj is connectedUser)
{
curUser = (connectedUser)obj;
}
object temp;
try
{
while (true)
{
if (curUser != null)
{
try
{
temp = formatter.Deserialize(curUser.commStream);
if (temp is Packets.connectPacket)
{
Packets.connectPacket msg = (Packets.connectPacket)temp;
if (msg.p2p)
{
curUser.UserName = msg.clientUser;
IPAddress userIP = null;
foreach (var user in userSockets)
{
// find the requested user's IPAddress
if (user.UserName == msg.targetUser)
{
userIP = user.UserIpAddress;
}
}
//send target user IP Address to requester
Packets.IpAddressPacket targIp = new Packets.IpAddressPacket();
targIp.p2pIpAddress = userIP;
formatter.Serialize(curUser.commStream, targIp); //returns IpAddress type object to request to connect
}
else
{
curUser.UserName = msg.clientUser;
IPEndPoint curUserIpPoint = curUser.userSocket.RemoteEndPoint as IPEndPoint;
curUser.UserIpAddress = curUserIpPoint.Address;
curUser.Connected = true;
connectedClientsList.Add(curUser.UserName);
Packets.clientListPackets clientList = new Packets.clientListPackets();
clientList.userList = connectedClientsList;
formatter.Serialize(curUser.commStream, clientList);
if (!lstConnectedUsers.Dispatcher.CheckAccess())
{
Dispatcher.BeginInvoke(new scribe(writeToListBox), connectedClientsList);
}
}
}
if (temp is Packets.messagePacket)
{
Packets.messagePacket msg = (Packets.messagePacket)temp;
// for each user connected send message received to all
// except the sender
foreach (var user in userSockets)
{
if (user.ID != curUser.ID && user.Connected)
{
formatter.Serialize(user.commStream, msg);
}
}
}
if (temp is Packets.disconnectPacket)
{
/// remove the user from the server and clean up the thread/socket
Packets.disconnectPacket msg = (Packets.disconnectPacket)temp;
foreach (var user in userSockets.Where(u => u.UserName == msg.clientUser))
{
user.Connected = false;
Id = user.UserName;
}
//disconnect socket and clean up threads
// userSockets[userId - 1].Connected = false;
//update the connectedClientList and notify other clients
connectedClientsList.Remove(msg.clientUser);
Packets.clientListPackets clientList = new Packets.clientListPackets();
clientList.userList = connectedClientsList;
formatter.Serialize(curUser.commStream, clientList);
if (!lstConnectedUsers.Dispatcher.CheckAccess())
{
Dispatcher.BeginInvoke(new scribe(writeToListBox), connectedClientsList);
}
//shutdown the connection to the client and kill the thread
int loc = userSockets.FindIndex(
delegate(connectedUser user)
{
return(user.UserName == Id);
}
);
userSockets[loc].userSocket.Shutdown(SocketShutdown.Both);
userSockets[loc].userSocket.Dispose();
userSockets[loc].userSocket.Close();
userSockets.RemoveAt(loc);
try
{
communicationThreads[loc].Abort();
//abort will throw thread exception here
}
catch (ThreadAbortException e)
{
//do nothing if the thread is being terminated here
//handle the exception thrown by Abort() without the message from the disconnect
communicationThreads.RemoveAt(loc);
this.userId--; //class level userId
}
//finally {
//}
}
}
catch (SerializationException e) { }
}
}
}
catch (SocketException e)
{
MessageBox.Show("Client Disconnected" + e.ToString());
}
}
