/// <summary>
/// Start the server. Listen to client connections.
/// </summary>
public void Start()
{
IPAddress ipAddress = IPAddress.Parse(localHostname);
IPEndPoint localEP = new IPEndPoint(ipAddress, localPort);
// Create a TCP/IP socket.
listeningSocket = new Socket(AddressFamily.InterNetwork,
SocketType.Stream, ProtocolType.Tcp);
listeningSocket.Bind(localEP);
listeningSocket.Listen(100);
Thread acceptThread = new Thread(ServerAcceptThread);
if (serverMode == ServerMode.SINGLE_REDUNDANCY_GROUP)
{
if (redGroups.Count > 0)
{
RedundancyGroup singleGroup = redGroups[0];
redGroups.Clear();
redGroups.Add(singleGroup);
}
else
{
RedundancyGroup singleGroup = new RedundancyGroup();
redGroups.Add(singleGroup);
}
}
if (serverMode == ServerMode.SINGLE_REDUNDANCY_GROUP || serverMode == ServerMode.MULTIPLE_REDUNDANCY_GROUPS)
{
foreach (RedundancyGroup redGroup in redGroups)
{
redGroup.asduQueue = new ASDUQueue(maxQueueSize, enqueueMode, alParameters, DebugLog);
redGroup.server = this;
}
}
acceptThread.Start();
}
private void ServerAcceptThread()
{
running = true;
DebugLog("Waiting for connections...");
while (running)
{
try
{
Socket newSocket = listeningSocket.Accept();
if (newSocket != null)
{
newSocket.NoDelay = true;
DebugLog("New connection");
IPEndPoint ipEndPoint = (IPEndPoint)newSocket.RemoteEndPoint;
DebugLog(" from IP: " + ipEndPoint.Address.ToString());
bool acceptConnection = true;
if (OpenConnections >= maxOpenConnections)
{
acceptConnection = false;
}
if (acceptConnection && (connectionRequestHandler != null))
{
acceptConnection = connectionRequestHandler(connectionRequestHandlerParameter, ipEndPoint.Address);
}
if (acceptConnection)
{
ClientConnection connection = null;
if ((serverMode == ServerMode.SINGLE_REDUNDANCY_GROUP) || (serverMode == ServerMode.MULTIPLE_REDUNDANCY_GROUPS))
{
RedundancyGroup catchAllGroup = null;
RedundancyGroup matchingGroup = null;
/* get matching redundancy group */
foreach (RedundancyGroup redGroup in redGroups)
{
if (redGroup.Matches(ipEndPoint.Address))
{
matchingGroup = redGroup;
break;
}
if (redGroup.IsCatchAll)
{
catchAllGroup = redGroup;
}
}
if (matchingGroup == null)
{
matchingGroup = catchAllGroup;
}
if (matchingGroup != null)
{
connection = new ClientConnection(newSocket, securityInfo, apciParameters, alParameters, this,
matchingGroup.asduQueue, debugOutput);
matchingGroup.AddConnection(connection);
DebugLog("Add connection to group " + matchingGroup.Name);
}
else
{
DebugLog("Found no matching redundancy group -> close connection");
newSocket.Close();
}
}
else
{
connection = new ClientConnection(newSocket, securityInfo, apciParameters, alParameters, this,
new ASDUQueue(maxQueueSize, enqueueMode, alParameters, DebugLog), debugOutput);
}
if (connection != null)
{
allOpenConnections.Add(connection);
CallConnectionEventHandler(connection, ClientConnectionEvent.OPENED);
}
}
else
{
newSocket.Close();
}
}
}
catch (Exception)
{
running = false;
}
}
}
/// <summary>
/// Adds a redundancy group to the server. Each redundancy group has its own event queue.
/// </summary>
/// <param name="redundancyGroup">Redundancy group.</param>
public void AddRedundancyGroup(RedundancyGroup redundancyGroup)
{
redGroups.Add(redundancyGroup);
}