private void ThreadConnectionProc(object state)
{
while (true)
{
try
{
Socket s = _srvSocket.Accept();
if (s != null)
{
IChannel ch = new SocketChannel(s, true); /// TODO: Implement a generic mechanism to decouple Port from the type of channel to be created
if (_channelMgr != null)
{
IPEndPoint p = (IPEndPoint)s.RemoteEndPoint;
String uri = TcpIpUri.AddressPortAsUri(p.Address.ToString(), p.Port);
ch.Uri = uri;
//>> LDRTEST
// Check if there is an old version of the channel
// This means that the closing of the socket was not detected
if (_channelMgr.GetChannel(uri) != null)
{
_channelMgr.CloseChannel(uri);
CommMain.Logger.AddLog("Port.ThreadConnectionProc: Forced to close channel: " + uri, LoggerSeverities.Error);
}
//<< LDRTEST
_channelMgr.AddChannel(uri, ch);
}
if (_connHandler != null)
{
_connHandler(ch);
}
else
{
CommMain.Logger.AddLog("WARNING: Port.NotifySendError: ThreadConnectionProc is null.", LoggerSeverities.Error);
}
//>> LDR 2004.07.16
SocketChannel sch = (SocketChannel)ch;
sch.Run();
//<< LDR 2004.07.16
}
}
catch (SocketException sockEx)
{
CommMain.Logger.AddLog(sockEx);
if (Closing)
{
break;
}
}
catch (Exception ex)
{
CommMain.Logger.AddLog(ex);
}
}
}
/// <summary>
/// Creates a channel to exchange data with the end-point represented by
/// the supplied uniform resource identifier. If a channel to this end-point is already open,
/// it returns the existing channel
/// </summary>
/// <param name="uri"></param>
/// <param name="type">The type of channel to open. From the ChannelType enumeration</param>
/// <returns>The channel requested or null if an error occurs</returns>
/// <remarks>In this version it only handles SocketChannel</remarks>
public virtual IChannel OpenChannel(string uri, ChannelType type)
{
String ipAddr;
int port;
IChannel ch = null;
lock (_channels.SyncRoot)
{
try
{
if (type.Equals(ChannelType.Socket))
{
if (!_channels.ContainsKey(uri))
{
Socket socket = new Socket(
AddressFamily.InterNetwork,
SocketType.Stream,
ProtocolType.Tcp);
TcpIpUri.UriAsAddressPort(uri, out ipAddr, out port);
socket.Connect(new IPEndPoint(IPAddress.Parse(ipAddr), port));
if (socket.Connected)
{
ch = new SocketChannel(socket, true); /// TODO: Implement a generic mechanism to decouple ChannelManager from the type of channel to be created
ch.Uri = uri;
AddToChannels(uri, ch);
}
}
else
{
ch = (IChannel)_channels[uri];
}
}
}
catch (SocketException /*sockEx*/)
{
//Debug.WriteLine("OpenChannel socket error - " + sockEx.Message);
//CommMain.Logger.AddLog(sockEx); --> not necessary as we throw the exception
throw;
}
catch (Exception /*ex*/)
{
//Debug.WriteLine("OpenChannel error - " + ex.Message);
//CommMain.Logger.AddLog(ex); --> not necessary as we throw the exception
throw;
}
}
return(ch);
}
/// <summary>
/// Returns the URI for the destination specified in a message row
/// </summary>
/// <param name="row">The row containing data for a message</param>
/// <returns>The URI of the message destination</returns>
private string GetDestinationUri(DataRow row)
{
string destURI = null;
string addr = "0.0.0.0";
int port = Convert.ToInt32(row[(int)MsgsColumns.PortAdapter]);
if (!DBNull.Value.Equals(row[(int)MsgsColumns.IpAdapter]))
{
addr = (string)row[(int)MsgsColumns.IpAdapter];
}
else
{
addr = Configuration.AddressCache.GetAddressCache().GetUnitAddress(
(decimal)row[(int)MsgsColumns.UniId]);
}
destURI = TcpIpUri.AddressPortAsUri(addr, port);
return(destURI);
}
/// <summary>
/// Updates the address cache with the unit of a packet source
/// </summary>
/// <param name="packet">A received packet</param>
/// <param name="uri">The uri of the channel through which the packet came</param>
private void UpdateAddressCache(OPSTelegrama packet, string uri)
{
string ip;
int port;
TcpIpUri.UriAsAddressPort(uri, out ip, out port);
OPSPacketizer packetizer = new OPSPacketizer(packet.XmlData);
PacketData packData = packetizer.PacketInfo;
if (packData != null)
{
string src = packData.SourceId;
if ((src != null) && (src != ""))
{
Configuration.AddressCache.GetAddressCache().CacheUnitAddress(
decimal.Parse(src), ip);
}
}
}
/// <summary>
/// Constructor that takes the URI where the port listens for connections
/// </summary>
/// <param name="uri">The uniform resource identifier where the port listens for
/// connections to arrive</param>
/// <remarks>The current version only supports TCP/IP URIs and SocketChannel
/// </remarks>
public Port(String uri)
{
TcpIpUri.UriAsAddressPort(uri, out _ipAddress, out _port);
}