public void ServerWaitForData(Socket soc, int clientNumber, int clientId, string dateandTime)
{
try
{
if (pfnWorkerCallBack == null)
{
pfnWorkerCallBack = new AsyncCallback(ServerOnDataReceived);// call back function which is to be invoked when there is any write activity by the connected client
}
ServerSocketPacket theSocPkt = new ServerSocketPacket(soc, clientNumber, clientId, /*timePoint,*/ dateandTime);
soc.BeginReceive(theSocPkt.dataBuffer, 0, theSocPkt.dataBuffer.Length, SocketFlags.None, pfnWorkerCallBack, theSocPkt);
}
catch { }
}
public void ServerOnDataReceived(IAsyncResult asyn)
{
ServerSocketPacket socketData = (ServerSocketPacket)asyn.AsyncState;
string clientid = "";
try
{
int iRx = socketData.m_currentSocket.EndReceive(asyn);
int command = Convert.ToInt32(socketData.dataBuffer[1]);
string szData = "";
StringBuilder sb = new StringBuilder();
for (int j = 0; j < socketData.dataBuffer.Length; j++)
{
sb.Append(Convert.ToString(Convert.ToInt32(socketData.dataBuffer[j])) + " ");
//#region logic to cut the zeros from databuffer so log-file is smaller..
//if (j < 120)
//{
// if (
// (Convert.ToInt64(socketData.dataBuffer[j]) == 0) && (Convert.ToInt64(socketData.dataBuffer[j + 1]) == 0) && (Convert.ToInt64(socketData.dataBuffer[j + 2]) == 0) && (Convert.ToInt32(socketData.dataBuffer[j + 3]) == 0) && (Convert.ToInt32(socketData.dataBuffer[j + 4]) == 0) && (Convert.ToInt32(socketData.dataBuffer[j + 5]) == 0)
// )
// {
// break;
// }
//}
//#endregion
}
szData = sb.ToString();
if (Convert.ToInt32(socketData.dataBuffer[0]) == 64) // 64=@ do we have a valid header ?
{
#region message recognition section
switch (command) // identify command type
{
case 115: // Command 's' - which means connect , binary 115
{
#region connect handling
clientid = socketData.dataBuffer[2].ToString() + socketData.dataBuffer[3].ToString() + socketData.dataBuffer[4].ToString() + socketData.dataBuffer[5].ToString() + socketData.dataBuffer[6].ToString();
socketData.m_clientId = Convert.ToInt32(clientid);
try
{
if (htSocketList.Contains(socketData.m_clientId))
{
htSocketList.Remove(socketData.m_clientId);
}
htSocketList.Add(socketData.m_clientId, socketData); // save to hash table the clientnumber that defines the socket and the socketdata itself
}
catch (Exception ex)
{
MessageBox.Show("Cannot add:" + ex.Message);
}
break;
#endregion
}
case 66: // Command 'B' - message broadcast that comes from a client (this is not used yet..)
{
#region message broadcast
clientid = socketData.dataBuffer[2].ToString() + socketData.dataBuffer[3].ToString() + socketData.dataBuffer[4].ToString() + socketData.dataBuffer[5].ToString() + socketData.dataBuffer[6].ToString();
string message = System.Text.Encoding.GetEncoding("Windows-1253").GetString(socketData.dataBuffer);
message = message.Substring(19, message.IndexOf('^') - 19);
// save to db in order to broadcast
break;
#endregion
}
}
#endregion
}
else // if we detect an invalid command, drop the connection
{
CloseSockets(socketData.m_clientNumber);
}
ServerWaitForData(socketData.m_currentSocket, socketData.m_clientNumber, socketData.m_clientId, socketData.m_dateandtime); // Continue the waiting for data on the Socket
}
#region exception handling
catch (ObjectDisposedException ox)
{
//MessageBox.Show(ox.Message);
}
catch (SocketException se)
{
if (se.ErrorCode == 10054) // Error code for Connection reset by peer
{
m_workerSocketList[socketData.m_clientNumber] = null; // Remove the reference to the worker socket of the closed client so that this object will get garbage collected
}
else
{
}
}
#endregion
}