unsafe override protected bool ReleaseHandle()
{
SafeCloseSocket socketHandle = _socketHandle;
if (socketHandle != null && !socketHandle.IsInvalid)
{
// We are being finalized while the I/O operation associated
// with the current overlapped is still pending (e.g. on app
// domain shutdown). The socket has to be closed first to
// avoid reuse after delete of the native overlapped structure.
socketHandle.Dispose();
}
// Release the native overlapped structure
return(UnsafeCommonNativeMethods.LocalFree(handle) == IntPtr.Zero);
}
internal SocketError ReplaceHandle()
{
// Copy out values from key options. The copied values should be kept in sync with the
// handling in SafeCloseSocket.TrackOption. Note that we copy these values out first, before
// we change _handle, so that we can use the helpers on Socket which internally access _handle.
// Then once _handle is switched to the new one, we can call the setters to propagate the retrieved
// values back out to the new underlying socket.
bool broadcast = false, dontFragment = false, noDelay = false;
int receiveSize = -1, receiveTimeout = -1, sendSize = -1, sendTimeout = -1;
short ttl = -1;
LingerOption linger = null;
if (_handle.IsTrackedOption(TrackedSocketOptions.DontFragment))
{
dontFragment = DontFragment;
}
if (_handle.IsTrackedOption(TrackedSocketOptions.EnableBroadcast))
{
broadcast = EnableBroadcast;
}
if (_handle.IsTrackedOption(TrackedSocketOptions.LingerState))
{
linger = LingerState;
}
if (_handle.IsTrackedOption(TrackedSocketOptions.NoDelay))
{
noDelay = NoDelay;
}
if (_handle.IsTrackedOption(TrackedSocketOptions.ReceiveBufferSize))
{
receiveSize = ReceiveBufferSize;
}
if (_handle.IsTrackedOption(TrackedSocketOptions.ReceiveTimeout))
{
receiveTimeout = ReceiveTimeout;
}
if (_handle.IsTrackedOption(TrackedSocketOptions.SendBufferSize))
{
sendSize = SendBufferSize;
}
if (_handle.IsTrackedOption(TrackedSocketOptions.SendTimeout))
{
sendTimeout = SendTimeout;
}
if (_handle.IsTrackedOption(TrackedSocketOptions.Ttl))
{
ttl = Ttl;
}
// Then replace the handle with a new one
SafeCloseSocket oldHandle = _handle;
SocketError errorCode = SocketPal.CreateSocket(_addressFamily, _socketType, _protocolType, out _handle);
oldHandle.TransferTrackedState(_handle);
oldHandle.Dispose();
if (errorCode != SocketError.Success)
{
return(errorCode);
}
// And put back the copied settings. For DualMode, we use the value stored in the _handle
// rather than querying the socket itself, as on Unix stacks binding a dual-mode socket to
// an IPv6 address may cause the IPv6Only setting to revert to true.
if (_handle.IsTrackedOption(TrackedSocketOptions.DualMode))
{
DualMode = _handle.DualMode;
}
if (_handle.IsTrackedOption(TrackedSocketOptions.DontFragment))
{
DontFragment = dontFragment;
}
if (_handle.IsTrackedOption(TrackedSocketOptions.EnableBroadcast))
{
EnableBroadcast = broadcast;
}
if (_handle.IsTrackedOption(TrackedSocketOptions.LingerState))
{
LingerState = linger;
}
if (_handle.IsTrackedOption(TrackedSocketOptions.NoDelay))
{
NoDelay = noDelay;
}
if (_handle.IsTrackedOption(TrackedSocketOptions.ReceiveBufferSize))
{
ReceiveBufferSize = receiveSize;
}
if (_handle.IsTrackedOption(TrackedSocketOptions.ReceiveTimeout))
{
ReceiveTimeout = receiveTimeout;
}
if (_handle.IsTrackedOption(TrackedSocketOptions.SendBufferSize))
{
SendBufferSize = sendSize;
}
if (_handle.IsTrackedOption(TrackedSocketOptions.SendTimeout))
{
SendTimeout = sendTimeout;
}
if (_handle.IsTrackedOption(TrackedSocketOptions.Ttl))
{
Ttl = ttl;
}
return(SocketError.Success);
}