public TdsComm(string dataSource, int port, int packetSize, int timeout, TdsVersion tdsVersion)
{
this.packetSize = packetSize;
this.tdsVersion = tdsVersion;
this.dataSource = dataSource;
outBuffer = new byte[packetSize];
inBuffer = new byte[packetSize];
outBufferLength = packetSize;
inBufferLength = packetSize;
lsb = true;
IPEndPoint endPoint;
bool have_exception = false;
try {
#if NET_2_0
IPAddress ip;
if (IPAddress.TryParse(this.dataSource, out ip))
{
endPoint = new IPEndPoint(ip, port);
}
else
{
IPHostEntry hostEntry = Dns.GetHostEntry(this.dataSource);
endPoint = new IPEndPoint(hostEntry.AddressList [0], port);
}
#else
IPHostEntry hostEntry = Dns.Resolve(this.dataSource);
endPoint = new IPEndPoint(hostEntry.AddressList [0], port);
#endif
} catch (SocketException e) {
throw new TdsInternalException("Server does not exist or connection refused.", e);
}
try {
socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
IAsyncResult ares = socket.BeginConnect(endPoint, null, null);
int timeout_ms = timeout * 1000;
if (timeout > 0 && !ares.IsCompleted && !ares.AsyncWaitHandle.WaitOne(timeout_ms, false))
{
throw Tds.CreateTimeoutException(dataSource, "Open()");
}
socket.EndConnect(ares);
try {
// MS sets these socket option
socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.KeepAlive, 1);
} catch (SocketException) {
// Some platform may throw an exception, so
// eat all socket exception, yeaowww!
}
try {
#if NET_2_0
socket.NoDelay = true;
#endif
socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.SendTimeout, timeout_ms);
socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, timeout_ms);
} catch {
// Ignore exceptions here for systems that do not support these options.
}
// Let the stream own the socket and take the pleasure of closing it
stream = new NetworkStream(socket, true);
} catch (SocketException e) {
have_exception = true;
throw new TdsInternalException("Server does not exist or connection refused.", e);
} catch (Exception) {
have_exception = true;
throw;
} finally {
if (have_exception && socket != null)
{
try {
Socket s = socket;
socket = null;
s.Close();
} catch {}
}
}
if (!socket.Connected)
{
throw new TdsInternalException("Server does not exist or connection refused.", null);
}
packetsSent = 1;
}
