private void BroadCastCommand(Command cmd)
{
foreach (var mngr in _clients)
if (!mngr.IP.Equals(cmd.SenderIP))
{
mngr.SendCommand(cmd);
}
}
private void SendCommandToTarget(Command cmd)
{
foreach (var mngr in _clients)
if (mngr.IP.Equals(cmd.Target))
{
mngr.SendCommand(cmd);
return;
}
}
private void SendClientListToNewClient(IPAddress newClientIp)
{
foreach (var mngr in _clients)
{
if (mngr.Connected && !mngr.IP.Equals(newClientIp))
{
var cmd = new Command(CommandType.SendClientList, newClientIp)
{
MetaData = mngr.IP + ":" + mngr.ClientName,
SenderIP = _serverIp,
SenderName = "Server"
};
SendCommandToTarget(cmd);
}
}
}
private bool RemoveClientManager(IPAddress ip)
{
lock (this)
{
var index = IndexOfClient(ip);
if (index != -1)
{
var name = _clients[index].ClientName;
_clients.RemoveAt(index);
//Inform all clients that a client had been disconnected.
var cmd = new Command(CommandType.ClientLogOffInform, IPAddress.Broadcast) {SenderName = name, SenderIP = ip};
BroadCastCommand(cmd);
return true;
}
return false;
}
}
/// <summary>
/// Creates an instance of CommandEventArgs class.
/// </summary>
/// <param name="cmd">The received command.</param>
public CommandEventArgs(Command cmd)
{
Command = cmd;
}
private void StartReceive(object sender, DoWorkEventArgs e)
{
while (_socket.Connected)
{
//Read the command's Type.
var buffer = new byte[4];
var readBytes = _networkStream.Read(buffer, 0, 4);
if (readBytes == 0)
break;
var cmdType = (CommandType) (BitConverter.ToInt32(buffer, 0));
//Read the command's target size.
buffer = new byte[4];
readBytes = _networkStream.Read(buffer, 0, 4);
if (readBytes == 0)
break;
var ipSize = BitConverter.ToInt32(buffer, 0);
//Read the command's target.
buffer = new byte[ipSize];
readBytes = _networkStream.Read(buffer, 0, ipSize);
if (readBytes == 0)
break;
var cmdTarget = Encoding.ASCII.GetString(buffer);
//Read the command's MetaData size.
buffer = new byte[4];
readBytes = _networkStream.Read(buffer, 0, 4);
if (readBytes == 0)
break;
var metaDataSize = BitConverter.ToInt32(buffer, 0);
//Read the command's Meta data.
buffer = new byte[metaDataSize];
readBytes = _networkStream.Read(buffer, 0, metaDataSize);
if (readBytes == 0)
break;
var cmdMetaData = Encoding.Unicode.GetString(buffer);
var cmd = new Command(cmdType, IPAddress.Parse(cmdTarget), cmdMetaData) {SenderIP = IP};
cmd.SenderName = cmd.CommandType == CommandType.ClientLoginInform ? cmd.MetaData.Split(new[] {':'})[1] : ClientName;
OnCommandReceived(new CommandEventArgs(cmd));
}
OnDisconnected(new ClientEventArgs(_socket));
Disconnect();
}
private bool SendCommandToClient(Command cmd)
{
try
{
_semaphor.WaitOne();
//Type
var buffer = BitConverter.GetBytes((int) cmd.CommandType);
_networkStream.Write(buffer, 0, 4);
_networkStream.Flush();
//Sender IP
var senderIpBuffer = Encoding.ASCII.GetBytes(cmd.SenderIP.ToString());
buffer = BitConverter.GetBytes(senderIpBuffer.Length);
_networkStream.Write(buffer, 0, 4);
_networkStream.Flush();
_networkStream.Write(senderIpBuffer, 0, senderIpBuffer.Length);
_networkStream.Flush();
//Sender Name
var senderNameBuffer = Encoding.Unicode.GetBytes(cmd.SenderName);
buffer = BitConverter.GetBytes(senderNameBuffer.Length);
_networkStream.Write(buffer, 0, 4);
_networkStream.Flush();
_networkStream.Write(senderNameBuffer, 0, senderNameBuffer.Length);
_networkStream.Flush();
//Target
var ipBuffer = Encoding.ASCII.GetBytes(cmd.Target.ToString());
buffer = BitConverter.GetBytes(ipBuffer.Length);
_networkStream.Write(buffer, 0, 4);
_networkStream.Flush();
_networkStream.Write(ipBuffer, 0, ipBuffer.Length);
_networkStream.Flush();
//Meta Data.
if (string.IsNullOrEmpty(cmd.MetaData))
cmd.MetaData = "\n";
var metaBuffer = Encoding.Unicode.GetBytes(cmd.MetaData);
buffer = BitConverter.GetBytes(metaBuffer.Length);
_networkStream.Write(buffer, 0, 4);
_networkStream.Flush();
_networkStream.Write(metaBuffer, 0, metaBuffer.Length);
_networkStream.Flush();
_semaphor.Release();
return true;
}
catch
{
_semaphor.Release();
return false;
}
}
private bool RemoveClientManager(IPAddress ip)
{
lock ( this )
{
int index = this.IndexOfClient(ip);
if ( index != -1 )
{
string name = this.clients [index].ClientName;
this.clients.RemoveAt(index);
//Inform all clients that a client had been disconnected.
Command cmd = new Command(CommandType.ClientLogOffInform , IPAddress.Broadcast);
cmd.SenderName = name;
cmd.SenderIP = ip;
this.BroadCastCommand(cmd);
return true;
}
return false;
}
}
private void StartReceive(object sender , DoWorkEventArgs e)
{
while ( this.socket.Connected )
{
//Read the command's Type.
byte [] buffer = new byte [4];
int readBytes = this.networkStream.Read(buffer , 0 , 4);
if ( readBytes == 0 )
break;
CommandType cmdType = (CommandType)( BitConverter.ToInt32(buffer , 0) );
//Read the command's target size.
string cmdTarget = "";
buffer = new byte [4];
readBytes = this.networkStream.Read(buffer , 0 , 4);
if ( readBytes == 0 )
break;
int ipSize = BitConverter.ToInt32(buffer , 0);
//Read the command's target.
buffer = new byte [ipSize];
readBytes = this.networkStream.Read(buffer , 0 , ipSize);
if ( readBytes == 0 )
break;
cmdTarget = System.Text.Encoding.ASCII.GetString(buffer);
//Read the command's MetaData size.
string cmdMetaData = "";
buffer = new byte [4];
readBytes = this.networkStream.Read(buffer , 0 , 4);
if ( readBytes == 0 )
break;
int metaDataSize = BitConverter.ToInt32(buffer , 0);
//Read the command's Meta data.
buffer = new byte [metaDataSize];
readBytes = this.networkStream.Read(buffer , 0 , metaDataSize);
if ( readBytes == 0 )
break;
cmdMetaData = System.Text.Encoding.Unicode.GetString(buffer);
Command cmd = new Command(cmdType , IPAddress.Parse(cmdTarget) , cmdMetaData);
cmd.SenderIP = this.IP;
if ( cmd.CommandType == CommandType.ClientLoginInform )
cmd.SenderName = cmd.MetaData.Split(new char [] { ':' }) [1];
else
cmd.SenderName = this.ClientName;
this.OnCommandReceived(new CommandEventArgs(cmd));
}
this.OnDisconnected(new ClientEventArgs(this.socket));
this.Disconnect();
}
private bool SendCommandToClient(Command cmd)
{
try
{
semaphor.WaitOne();
//Type
byte [] buffer = new byte [4];
buffer = BitConverter.GetBytes((int)cmd.CommandType);
this.networkStream.Write(buffer , 0 , 4);
this.networkStream.Flush();
//Sender IP
byte [] senderIPBuffer = Encoding.ASCII.GetBytes(cmd.SenderIP.ToString());
buffer = new byte [4];
buffer = BitConverter.GetBytes(senderIPBuffer.Length);
this.networkStream.Write(buffer , 0 , 4);
this.networkStream.Flush();
this.networkStream.Write(senderIPBuffer , 0 , senderIPBuffer.Length);
this.networkStream.Flush();
//Sender Name
byte [] senderNameBuffer = Encoding.Unicode.GetBytes(cmd.SenderName.ToString());
buffer = new byte [4];
buffer = BitConverter.GetBytes(senderNameBuffer.Length);
this.networkStream.Write(buffer , 0 , 4);
this.networkStream.Flush();
this.networkStream.Write(senderNameBuffer , 0 , senderNameBuffer.Length);
this.networkStream.Flush();
//Target
byte [] ipBuffer = Encoding.ASCII.GetBytes(cmd.Target.ToString());
buffer = new byte [4];
buffer = BitConverter.GetBytes(ipBuffer.Length);
this.networkStream.Write(buffer , 0 , 4);
this.networkStream.Flush();
this.networkStream.Write(ipBuffer , 0 , ipBuffer.Length);
this.networkStream.Flush();
//Meta Data.
if ( cmd.MetaData == null || cmd.MetaData == "" )
cmd.MetaData = "\n";
byte [] metaBuffer = Encoding.Unicode.GetBytes(cmd.MetaData);
buffer = new byte [4];
buffer = BitConverter.GetBytes(metaBuffer.Length);
this.networkStream.Write(buffer , 0 , 4);
this.networkStream.Flush();
this.networkStream.Write(metaBuffer , 0 , metaBuffer.Length);
this.networkStream.Flush();
semaphor.Release();
return true;
}
catch
{
semaphor.Release();
return false;
}
}
/// <summary>
/// Sends a command to the remote client if the connection is alive.
/// </summary>
/// <param name="cmd">The command to send.</param>
public void SendCommand(Command cmd)
{
if ( this.socket != null && this.socket.Connected )
{
BackgroundWorker bwSender = new BackgroundWorker();
bwSender.DoWork += new DoWorkEventHandler(bwSender_DoWork);
bwSender.RunWorkerCompleted += new RunWorkerCompletedEventHandler(bwSender_RunWorkerCompleted);
bwSender.RunWorkerAsync(cmd);
}
else
this.OnCommandFailed(new EventArgs());
}
private void BroadCastCommand(Command cmd)
{
foreach ( ClientManager mngr in this.clients )
if ( !mngr.IP.Equals(cmd.SenderIP) )
mngr.SendCommand(cmd);
}
private void SendExistanceCommand(IPAddress targetIP , bool isExists)
{
Command cmdExistance = new Command(CommandType.IsNameExists , targetIP , isExists.ToString());
cmdExistance.SenderIP = this.serverIP;
cmdExistance.SenderName = "Server";
this.SendCommandToTarget(cmdExistance);
}
private void SendCommandToTarget(Command cmd)
{
foreach ( ClientManager mngr in this.clients )
if ( mngr.IP.Equals(cmd.Target) )
{
mngr.SendCommand(cmd);
return;
}
}
private void SendClientListToNewClient(IPAddress newClientIP)
{
foreach ( ClientManager mngr in this.clients )
{
if ( mngr.Connected && !mngr.IP.Equals(newClientIP) )
{
Command cmd = new Command(CommandType.SendClientList , newClientIP);
cmd.MetaData = mngr.IP.ToString() + ":" + mngr.ClientName;
cmd.SenderIP = this.serverIP;
cmd.SenderName = "Server";
this.SendCommandToTarget(cmd);
}
}
}
private void SendExistanceCommand(IPAddress targetIP, bool isExists)
{
var cmdExistance = new Command(CommandType.IsNameExists, targetIP, isExists.ToString())
{
SenderIP = _serverIp,
SenderName = "Server"
};
SendCommandToTarget(cmdExistance);
}
/// <summary>
/// Sends a command to the remote client if the connection is alive.
/// </summary>
/// <param name="cmd">The command to send.</param>
public void SendCommand(Command cmd)
{
if (_socket != null && _socket.Connected)
{
var bwSender = new BackgroundWorker();
bwSender.DoWork += BwSenderDoWork;
bwSender.RunWorkerCompleted += BwSenderRunWorkerCompleted;
bwSender.RunWorkerAsync(cmd);
}
else
{
OnCommandFailed(new EventArgs());
}
}
/// <summary>
/// Creates an instance of CommandEventArgs class.
/// </summary>
/// <param name="cmd">The received command.</param>
public CommandEventArgs(Command cmd)
{
this.command = cmd;
}