public void connect()
{
cxn.IsConnected = false;
if (dataSource == null)
{
throw new ArgumentNullException("No data source");
}
string hostname = dataSource.Provider;
if (hostname == null || hostname == "")
{
throw new ArgumentNullException("No provider (hostname)");
}
//Start my listener - make sure we use an IPV4 address as IPV6 address listeners are incompatible with this algorithm
IPHostEntry hostEntry = Dns.GetHostEntry("localhost");
IPAddress[] myIPs = ((IPHostEntry)Dns.GetHostEntry(hostEntry.HostName)).AddressList;
IPAddress myIP = null;
foreach (IPAddress ip in myIPs)
{
if (ip != null && ip.AddressFamily == AddressFamily.InterNetwork)
{
myIP = ip;
break;
}
}
if (myIP == null)
{
throw new Exception("Unable to obtain a local IPV4 address for the connection listener");
}
IPEndPoint myEndPoint = new IPEndPoint(myIP, 0);
MdoSocket listener = new MdoSocket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
listener.Bind(myEndPoint);
int myPort = ((IPEndPoint)listener.LocalEndPoint).Port;
listener.Listen(2);
//Build the request message
string request = "TCPconnect^" + myIP.ToString() + '^' + myPort + '^' + hostEntry.HostName;
request = "{XWB}" + StringUtils.strPack(request, 5);
//Config my client socket and connnect to VistA
IPAddress vistaIP = null;
try
{
vistaIP = ((IPAddress[])Dns.GetHostAddresses(hostname))[0]; // GetHostAddresses takes a hostname or IP - cool!
}
catch (SocketException se)
{
throw new ConnectionException("No route to host " + hostname, se);
}
IPEndPoint vistaEndPoint = new IPEndPoint(vistaIP, cxn.port);
cxn.socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
cxn.socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, cxn.ConnectTimeout);
try
{
cxn.socket.Connect(vistaEndPoint);
}
catch (SocketException se)
{
throw new ConnectionException("No VistA listener at " + hostname + ", port " + cxn.port, se);
}
if (!cxn.socket.Connected)
{
listener.Close();
throw new ConnectionException("Unable to connect to " + hostname + ", port " + cxn.port);
}
string reply = "";
try
{
reply = (string)cxn.query(request);
}
catch (SocketException se)
{
throw new ConnectionException("No VistA listener at " + vistaIP, se);
}
if (reply != "accept")
{
listener.Close(cxn.ConnectTimeout);
cxn.socket.Close();
throw new ConnectionException("Unaccepted by " + hostname);
}
//Do the hookup
cxn.socket.Close();
cxn.socket = listener.Accept(LISTENER_TIMEOUT); // use MdoSocket timeout arg so listener doesn't turn in to a server in the event Vista fails to call back
listener.Close();
cxn.socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, cxn.ReadTimeout);
// Fix up the return stuff for successful connection
cxn.WelcomeMessage = cxn.getWelcomeMessage();
cxn.IsConnected = true;
}
public void connect()
{
cxn.IsConnected = false;
if (dataSource == null)
{
throw new ArgumentNullException("No data source");
}
string hostname = dataSource.Provider;
if (hostname == null || hostname == "")
{
throw new ArgumentNullException("No provider (hostname)");
}
//Start my listener - make sure we use an IPV4 address as IPV6 address listeners are incompatible with this algorithm
IPHostEntry hostEntry = Dns.GetHostEntry("localhost");
IPAddress[] myIPs = ((IPHostEntry)Dns.GetHostEntry(hostEntry.HostName)).AddressList;
IPAddress myIP = null;
foreach (IPAddress ip in myIPs)
{
if (ip != null && ip.AddressFamily == AddressFamily.InterNetwork)
{
myIP = ip;
break;
}
}
if (myIP == null)
{
throw new Exception("Unable to obtain a local IPV4 address for the connection listener");
}
IPEndPoint myEndPoint = new IPEndPoint(myIP, 0);
MdoSocket listener = new MdoSocket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
listener.Bind(myEndPoint);
int myPort = ((IPEndPoint)listener.LocalEndPoint).Port;
listener.Listen(2);
//Build the request message
string request = "TCPconnect^" + myIP.ToString() + '^' + myPort + '^' + hostEntry.HostName;
request = "{XWB}" + StringUtils.strPack(request, 5);
//Config my client socket and connnect to VistA
IPAddress vistaIP = null;
try
{
vistaIP = ((IPAddress[])Dns.GetHostAddresses(hostname))[0]; // GetHostAddresses takes a hostname or IP - cool!
}
catch (SocketException se)
{
throw new ConnectionException("No route to host " + hostname, se);
}
IPEndPoint vistaEndPoint = new IPEndPoint(vistaIP, cxn.port);
cxn.socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
cxn.socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, cxn.ConnectTimeout);
try
{
cxn.socket.Connect(vistaEndPoint);
}
catch (SocketException se)
{
throw new ConnectionException("No VistA listener at " + hostname + ", port " + cxn.port, se);
}
if (!cxn.socket.Connected)
{
listener.Close();
throw new ConnectionException("Unable to connect to " + hostname + ", port " + cxn.port);
}
string reply = "";
try
{
reply = (string)cxn.query(request);
}
catch (SocketException se)
{
throw new ConnectionException("No VistA listener at " + vistaIP, se);
}
if (reply != "accept")
{
listener.Close(cxn.ConnectTimeout);
cxn.socket.Close();
throw new ConnectionException("Unaccepted by " + hostname);
}
//Do the hookup
cxn.socket.Close();
cxn.socket = listener.Accept(LISTENER_TIMEOUT); // use MdoSocket timeout arg so listener doesn't turn in to a server in the event Vista fails to call back
listener.Close();
cxn.socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, cxn.ReadTimeout);
// Fix up the return stuff for successful connection
cxn.WelcomeMessage = cxn.getWelcomeMessage();
cxn.IsConnected = true;
}
