// Remove a connection from the list of active connections
private void RemoveConnection(SockWrapper s)
{
try
{
s.Client.Shutdown(SocketShutdown.Both);
s.Client.Close();
}
catch {}
// Remove it from the array
try
{
m_aryClients.Remove(s);
}
catch {}
// Fire the Disconnected event
if (Disconnected != null)
{
Disconnected(this, ref s.obj);
}
}
// Client has sent data, or has disconnected
private void OnReceivedData(IAsyncResult ar)
{
// Socket was the passed in object
SockWrapper s = (SockWrapper)ar.AsyncState;
lock (this)
{
if (!m_bShuttingDown)
{
// Check if we got any data
try
{
int nBytesRec = s.Client.EndReceive(ar);
if (nBytesRec > 0)
{
if (DataReceived != null)
{
DataReceived(this, ref s.obj, ref s.byBuff, nBytesRec);
}
// Restablish the callback
AsyncCallback receiveData = new AsyncCallback(OnReceivedData);
s.Client.BeginReceive(s.byBuff, 0, s.byBuff.Length, SocketFlags.None, receiveData, s);
}
else
{
// If no data was received then the connection is probably dead
RemoveConnection(s);
}
}
catch
{
RemoveConnection(s);
}
}
}
}
// Client has connected
private void OnConnectRequest(IAsyncResult ar)
{
// Get the listener and client
Socket listener = (Socket)ar.AsyncState;
Socket client = listener.EndAccept(ar);
lock (this)
{
if (!m_bShuttingDown)
{
// Wrap the client and add it to the array
SockWrapper s = new SockWrapper(client);
m_aryClients.Add(s);
// Fire the Connected event
if (Connected != null)
{
Connected(this, ref s.obj);
}
// Set up an async wait for packets from the client
AsyncCallback receiveData = new AsyncCallback(OnReceivedData);
s.Client.BeginReceive(s.byBuff, 0, s.byBuff.Length, SocketFlags.None, receiveData, s);
// (Re)Setup a callback to be notified of connection requests
listener.BeginAccept(new AsyncCallback(OnConnectRequest), listener);
}
else
{
// If we are in shutdown mode, DON'T add
// the connection to the array, DON'T setup
// the async listen, and DO set the event
// to say we are done.
ShutDownReady.Set();
}
}
}
private void _SendOne(SockWrapper s, byte [] b, int iLength)
{
try
{
bool bSend = true;
if (Send != null)
{
Send(this, ref s.obj, ref bSend);
}
if (bSend)
{
s.Client.Send(b, iLength, SocketFlags.None);
}
}
catch
{
// Ignore the error. If the client is dead, OnReceiveData
// will be called to close the connection. I would remove it
// anyway, except bad things happen if you remove an entry
// from a list while using foreach.
}
}
private void _SendOne(SockWrapper s, byte [] b, int iLength)
{
try
{
bool bSend = true;
if (Send != null)
Send(this, ref s.obj, ref bSend);
if (bSend)
s.Client.Send(b, iLength, SocketFlags.None);
}
catch
{
// Ignore the error. If the client is dead, OnReceiveData
// will be called to close the connection. I would remove it
// anyway, except bad things happen if you remove an entry
// from a list while using foreach.
}
}
// Remove a connection from the list of active connections
private void RemoveConnection(SockWrapper s)
{
try
{
s.Client.Shutdown( SocketShutdown.Both );
s.Client.Close();
}
catch {}
// Remove it from the array
try
{
m_aryClients.Remove( s );
}
catch {}
// Fire the Disconnected event
if (Disconnected != null)
Disconnected(this, ref s.obj);
}
// Client has connected
private void OnConnectRequest( IAsyncResult ar )
{
// Get the listener and client
Socket listener = (Socket)ar.AsyncState;
Socket client = listener.EndAccept( ar );
lock (this)
{
if (!m_bShuttingDown)
{
// Wrap the client and add it to the array
SockWrapper s = new SockWrapper(client);
m_aryClients.Add( s );
// Fire the Connected event
if (Connected != null)
Connected(this, ref s.obj);
// Set up an async wait for packets from the client
AsyncCallback receiveData = new AsyncCallback( OnReceivedData );
s.Client.BeginReceive( s.byBuff, 0, s.byBuff.Length, SocketFlags.None, receiveData, s );
// (Re)Setup a callback to be notified of connection requests
listener.BeginAccept(new AsyncCallback( OnConnectRequest ) , listener );
}
else
{
// If we are in shutdown mode, DON'T add
// the connection to the array, DON'T setup
// the async listen, and DO set the event
// to say we are done.
ShutDownReady.Set();
}
}
}
