// does not reach here.
/// <summary>
/// The contract is similar to
/// <see cref="SocketChannel.Connect(System.Net.EndPoint)"/>
///
/// with a timeout.
/// </summary>
/// <seealso cref="SocketChannel.Connect(System.Net.EndPoint)"/>
/// <param name="channel">
/// - this should be a
/// <see cref="SelectableChannel"/>
/// </param>
/// <param name="endpoint"/>
/// <exception cref="System.IO.IOException"/>
internal static void Connect(SocketChannel channel, EndPoint endpoint, int timeout
)
{
bool blockingOn = channel.IsBlocking();
if (blockingOn)
{
channel.ConfigureBlocking(false);
}
try
{
if (channel.Connect(endpoint))
{
return;
}
long timeoutLeft = timeout;
long endTime = (timeout > 0) ? (Time.Now() + timeout) : 0;
while (true)
{
// we might have to call finishConnect() more than once
// for some channels (with user level protocols)
int ret = selector.Select((SelectableChannel)channel, SelectionKey.OpConnect, timeoutLeft
);
if (ret > 0 && channel.FinishConnect())
{
return;
}
if (ret == 0 || (timeout > 0 && (timeoutLeft = (endTime - Time.Now())) <= 0))
{
throw new SocketTimeoutException(TimeoutExceptionString(channel, timeout, SelectionKey
.OpConnect));
}
}
}
catch (IOException e)
{
// javadoc for SocketChannel.connect() says channel should be closed.
try
{
channel.Close();
}
catch (IOException)
{
}
throw;
}
finally
{
if (blockingOn && channel.IsOpen())
{
channel.ConfigureBlocking(true);
}
}
}
