private unsafe void tcp_bind_windows_extras(UvTcpHandle handle)
{
const int SIO_LOOPBACK_FAST_PATH = -1744830448; // IOC_IN | IOC_WS2 | 16;
const int WSAEOPNOTSUPP = 10000 + 45; // (WSABASEERR+45)
const int SOCKET_ERROR = -1;
var socket = IntPtr.Zero;
Check(_uv_fileno(handle, ref socket));
// Enable loopback fast-path for lower latency for localhost comms, like HttpPlatformHandler fronting
// http://blogs.technet.com/b/wincat/archive/2012/12/05/fast-tcp-loopback-performance-and-low-latency-with-windows-server-2012-tcp-loopback-fast-path.aspx
// https://github.com/libuv/libuv/issues/489
var optionValue = 1;
uint dwBytes = 0u;
var result = NativeMethods.WSAIoctl(socket, SIO_LOOPBACK_FAST_PATH, &optionValue, sizeof(int), null, 0, out dwBytes, IntPtr.Zero, IntPtr.Zero);
if (result == SOCKET_ERROR)
{
var errorId = NativeMethods.WSAGetLastError();
if (errorId == WSAEOPNOTSUPP)
{
// This system is not >= Windows Server 2012, and the call is not supported.
}
else
{
Check(errorId);
}
}
}
public void tcp_bind(UvTcpHandle handle, ref SockAddr addr, int flags)
{
handle.Validate();
Check(_uv_tcp_bind(handle, ref addr, flags));
if (Platform.System == OS.Windows)
{
tcp_bind_windows_extras(handle);
}
}
public void Connect(
UvTcpHandle tcp,
ref SockAddr address,
Action <UvConnectRequest, int, Exception, object> callback,
object state)
{
_callback = callback;
_state = state;
Pin();
_uv.tcp_connect(this, tcp, ref address, _uv_connect_cb);
}
public static extern int uv_tcp_getpeername(UvTcpHandle handle,out SockAddr name,ref int namelen);
public static extern int uv_tcp_keepalive(UvTcpHandle handle,int enable,uint delay);
public static extern int uv_tcp_nodelay(UvTcpHandle handle,int enable);
public static extern int uv_tcp_connect(UvConnectRequest req,UvTcpHandle handle,ref SockAddr addr,uv_connect_cb cb);
public static extern int uv_tcp_open(UvTcpHandle handle,IntPtr hSocket);
public static extern int uv_tcp_bind(UvTcpHandle handle,ref SockAddr addr,int flags);
public static extern int uv_tcp_init(UvLoopHandle loop,UvTcpHandle handle);
public void tcp_getpeername(UvTcpHandle handle, out SockAddr addr, ref int namelen)
{
handle.Validate();
Check(_uv_tcp_getpeername(handle, out addr, ref namelen));
}
public void tcp_keepalive(UvTcpHandle handle, bool enable, uint delay)
{
handle.Validate();
Check(_uv_tcp_keepalive(handle, enable ? 1 : 0, delay));
}
public void tcp_nodelay(UvTcpHandle handle, bool enable)
{
handle.Validate();
Check(_uv_tcp_nodelay(handle, enable ? 1 : 0));
}
public void tcp_open(UvTcpHandle handle, IntPtr hSocket)
{
handle.Validate();
Check(_uv_tcp_open(handle, hSocket));
}
public void tcp_connect(UvConnectRequest req, UvTcpHandle handle, ref SockAddr addr, uv_connect_cb connect_cb)
{
req.Validate();
handle.Validate();
_uv_tcp_connect(req, handle, ref addr, connect_cb);
}
public void tcp_init(UvLoopHandle loop, UvTcpHandle handle)
{
loop.Validate();
handle.Validate();
Check(_uv_tcp_init(loop, handle));
}