| public static GetSocketErrorForErrorCode ( System.Net.Interop errorCode ) : SocketError | ||
| errorCode | System.Net.Interop | |
| return | SocketError | |
private Interop.Error CloseHandle(IntPtr handle)
{
Interop.Error errorCode = Interop.Error.SUCCESS;
bool remappedError = false;
if (Interop.Sys.Close(handle) != 0)
{
errorCode = Interop.Sys.GetLastError();
if (errorCode == Interop.Error.ECONNRESET)
{
// Some Unix platforms (e.g. FreeBSD) non-compliantly return ECONNRESET from close().
// For our purposes, we want to ignore such a "failure" and treat it as success.
// In such a case, the file descriptor was still closed and there's no corrective
// action to take.
errorCode = Interop.Error.SUCCESS;
remappedError = true;
}
}
if (NetEventSource.IsEnabled)
{
NetEventSource.Info(this, remappedError ?
$"handle:{handle}, close():ECONNRESET, but treating it as SUCCESS" :
$"handle:{handle}, close():{errorCode}");
}
#if DEBUG
_closeSocketHandle = handle;
_closeSocketResult = SocketPal.GetSocketErrorForErrorCode(errorCode);
#endif
return(errorCode);
}
public static unsafe InnerSafeCloseSocket CreateSocket(AddressFamily addressFamily, SocketType socketType, ProtocolType protocolType, out SocketError errorCode)
{
int fd;
Interop.Error error = Interop.Sys.Socket(addressFamily, socketType, protocolType, &fd);
if (error == Interop.Error.SUCCESS)
{
Debug.Assert(fd != -1);
errorCode = SocketError.Success;
// The socket was created successfully; make it non-blocking and enable
// IPV6_V6ONLY by default for AF_INET6 sockets.
int err = Interop.Sys.Fcntl.SetIsNonBlocking((IntPtr)fd, 1);
if (err != 0)
{
Interop.Sys.Close((IntPtr)fd);
fd = -1;
errorCode = SocketError.SocketError;
}
else if (addressFamily == AddressFamily.InterNetworkV6)
{
int on = 1;
error = Interop.Sys.SetSockOpt(fd, SocketOptionLevel.IPv6, SocketOptionName.IPv6Only, (byte *)&on, sizeof(int));
if (error != Interop.Error.SUCCESS)
{
Interop.Sys.Close((IntPtr)fd);
fd = -1;
errorCode = SocketPal.GetSocketErrorForErrorCode(error);
}
}
}
else
{
Debug.Assert(fd == -1);
errorCode = SocketPal.GetSocketErrorForErrorCode(error);
}
var res = new InnerSafeCloseSocket();
res.SetHandle((IntPtr)fd);
return(res);
}
internal static unsafe InnerSafeCloseSocket CreateSocket(AddressFamily addressFamily, SocketType socketType, ProtocolType protocolType, out SocketError errorCode)
{
IntPtr fd;
Interop.Error error = Interop.Sys.Socket(addressFamily, socketType, protocolType, &fd);
if (error == Interop.Error.SUCCESS)
{
Debug.Assert(fd != (IntPtr)(-1), "fd should not be -1");
errorCode = SocketError.Success;
// The socket was created successfully; enable IPV6_V6ONLY by default for normal AF_INET6 sockets.
// This fails on raw sockets so we just let them be in default state.
if (addressFamily == AddressFamily.InterNetworkV6 && socketType != SocketType.Raw)
{
int on = 1;
error = Interop.Sys.SetSockOpt(fd, SocketOptionLevel.IPv6, SocketOptionName.IPv6Only, (byte *)&on, sizeof(int));
if (error != Interop.Error.SUCCESS)
{
Interop.Sys.Close(fd);
fd = (IntPtr)(-1);
errorCode = SocketPal.GetSocketErrorForErrorCode(error);
}
}
}
else
{
Debug.Assert(fd == (IntPtr)(-1), $"Unexpected fd: {fd}");
errorCode = SocketPal.GetSocketErrorForErrorCode(error);
}
var res = new InnerSafeCloseSocket();
res.SetHandle(fd);
return(res);
}
public static unsafe InnerSafeCloseSocket CreateSocket(AddressFamily addressFamily, SocketType socketType, ProtocolType protocolType, out SocketError errorCode)
{
int fd;
Interop.Error error = Interop.Sys.Socket(addressFamily, socketType, protocolType, &fd);
if (error == Interop.Error.SUCCESS)
{
Debug.Assert(fd != -1, "fd should not be -1");
errorCode = SocketError.Success;
// The socket was created successfully; enable IPV6_V6ONLY by default for AF_INET6 sockets.
if (addressFamily == AddressFamily.InterNetworkV6)
{
int on = 1;
error = Interop.Sys.DangerousSetSockOpt(fd, SocketOptionLevel.IPv6, SocketOptionName.IPv6Only, (byte *)&on, sizeof(int));
if (error != Interop.Error.SUCCESS)
{
Interop.Sys.Close((IntPtr)fd);
fd = -1;
errorCode = SocketPal.GetSocketErrorForErrorCode(error);
}
}
}
else
{
Debug.Assert(fd == -1, $"Unexpected fd: {fd}");
errorCode = SocketPal.GetSocketErrorForErrorCode(error);
}
var res = new InnerSafeCloseSocket();
res.SetHandle((IntPtr)fd);
return(res);
}
private unsafe SocketError InnerReleaseHandle()
{
Interop.Error errorCode = Interop.Error.SUCCESS;
// If _abortive was set to false in Close, it's safe to block here, which means
// we can honor the linger options set on the socket. It also means closesocket() might return WSAEWOULDBLOCK, in which
// case we need to do some recovery.
if (!_abortive)
{
if (NetEventSource.IsEnabled)
{
NetEventSource.Info(this, $"handle:{handle} Following 'non-abortive' branch.");
}
// Close, and if its errno is other than EWOULDBLOCK, there's nothing more to do - we either succeeded or failed.
errorCode = CloseHandle(handle);
if (errorCode != Interop.Error.EWOULDBLOCK)
{
return(SocketPal.GetSocketErrorForErrorCode(errorCode));
}
// The socket must be non-blocking with a linger timeout set.
// We have to set the socket to blocking.
if (Interop.Sys.Fcntl.DangerousSetIsNonBlocking(handle, 0) == 0)
{
// The socket successfully made blocking; retry the close().
return(SocketPal.GetSocketErrorForErrorCode(CloseHandle(handle)));
}
// The socket could not be made blocking; fall through to the regular abortive close.
}
// By default or if the non-abortive path failed, set linger timeout to zero to get an abortive close (RST).
var linger = new Interop.Sys.LingerOption
{
OnOff = 1,
Seconds = 0
};
errorCode = Interop.Sys.SetLingerOption(handle, &linger);
#if DEBUG
_closeSocketLinger = SocketPal.GetSocketErrorForErrorCode(errorCode);
#endif
if (NetEventSource.IsEnabled)
{
NetEventSource.Info(this, $"handle:{handle}, setsockopt():{errorCode}");
}
switch (errorCode)
{
case Interop.Error.SUCCESS:
case Interop.Error.EINVAL:
case Interop.Error.ENOPROTOOPT:
errorCode = CloseHandle(handle);
break;
// For other errors, it's too dangerous to try closesocket() - it might block!
}
return(SocketPal.GetSocketErrorForErrorCode(errorCode));
}
private unsafe SocketError InnerReleaseHandle()
{
int errorCode;
// If _blockable was set in BlockingRelease, it's safe to block here, which means
// we can honor the linger options set on the socket. It also means closesocket() might return WSAEWOULDBLOCK, in which
// case we need to do some recovery.
if (_blockable)
{
if (NetEventSource.IsEnabled)
{
NetEventSource.Info(this, $"handle:{handle} Following 'blockable' branch.");
}
errorCode = Interop.Sys.Close(handle);
if (errorCode == -1)
{
errorCode = (int)Interop.Sys.GetLastError();
}
if (NetEventSource.IsEnabled)
{
NetEventSource.Info(this, $"handle:{handle}, close()#1:{errorCode}");
}
#if DEBUG
_closeSocketHandle = handle;
_closeSocketResult = SocketPal.GetSocketErrorForErrorCode((Interop.Error)errorCode);
#endif
// If it's not EWOULDBLOCK, there's no more recourse - we either succeeded or failed.
if (errorCode != (int)Interop.Error.EWOULDBLOCK)
{
return(SocketPal.GetSocketErrorForErrorCode((Interop.Error)errorCode));
}
// The socket must be non-blocking with a linger timeout set.
// We have to set the socket to blocking.
errorCode = Interop.Sys.Fcntl.DangerousSetIsNonBlocking(handle, 0);
if (errorCode == 0)
{
// The socket successfully made blocking; retry the close().
errorCode = Interop.Sys.Close(handle);
if (NetEventSource.IsEnabled)
{
NetEventSource.Info(this, $"handle:{handle}, close()#2:{errorCode}");
}
#if DEBUG
_closeSocketHandle = handle;
_closeSocketResult = SocketPal.GetSocketErrorForErrorCode((Interop.Error)errorCode);
#endif
return(SocketPal.GetSocketErrorForErrorCode((Interop.Error)errorCode));
}
// The socket could not be made blocking; fall through to the regular abortive close.
}
// By default or if CloseAsIs() path failed, set linger timeout to zero to get an abortive close (RST).
var linger = new Interop.Sys.LingerOption {
OnOff = 1,
Seconds = 0
};
errorCode = (int)Interop.Sys.SetLingerOption(handle, &linger);
#if DEBUG
_closeSocketLinger = SocketPal.GetSocketErrorForErrorCode((Interop.Error)errorCode);
#endif
if (NetEventSource.IsEnabled)
{
NetEventSource.Info(this, $"handle:{handle}, setsockopt():{errorCode}");
}
if (errorCode != 0 && errorCode != (int)Interop.Error.EINVAL && errorCode != (int)Interop.Error.ENOPROTOOPT)
{
// Too dangerous to try closesocket() - it might block!
return(SocketPal.GetSocketErrorForErrorCode((Interop.Error)errorCode));
}
errorCode = Interop.Sys.Close(handle);
#if DEBUG
_closeSocketHandle = handle;
_closeSocketResult = SocketPal.GetSocketErrorForErrorCode((Interop.Error)errorCode);
#endif
if (NetEventSource.IsEnabled)
{
NetEventSource.Info(this, $"handle:{handle}, close#3():{(errorCode == -1 ? (int)Interop.Sys.GetLastError() : errorCode)}");
}
return(SocketPal.GetSocketErrorForErrorCode((Interop.Error)errorCode));
}
private unsafe SocketError InnerReleaseHandle()
{
int errorCode;
if (_asyncContext != null)
{
_asyncContext.Close();
}
// If _blockable was set in BlockingRelease, it's safe to block here, which means
// we can honor the linger options set on the socket. It also means closesocket() might return WSAEWOULDBLOCK, in which
// case we need to do some recovery.
if (_blockable)
{
GlobalLog.Print("SafeCloseSocket::ReleaseHandle(handle:" + handle.ToString("x") + ") Following 'blockable' branch.");
errorCode = Interop.Sys.Close((int)handle);
if (errorCode == -1)
{
errorCode = (int)Interop.Sys.GetLastError();
}
GlobalLog.Print("SafeCloseSocket::ReleaseHandle(handle:" + handle.ToString("x") + ") close()#1:" + errorCode.ToString());
#if DEBUG
_closeSocketHandle = handle;
_closeSocketResult = SocketPal.GetSocketErrorForErrorCode((Interop.Error)errorCode);
#endif
// If it's not EWOULDBLOCK, there's no more recourse - we either succeeded or failed.
if (errorCode != (int)Interop.Error.EWOULDBLOCK)
{
if (errorCode == 0 && _asyncContext != null)
{
_asyncContext.Close();
}
return(SocketPal.GetSocketErrorForErrorCode((Interop.Error)errorCode));
}
// The socket must be non-blocking with a linger timeout set.
// We have to set the socket to blocking.
errorCode = Interop.Sys.Fcntl.SetIsNonBlocking((int)handle, 0);
if (errorCode == 0)
{
// The socket successfully made blocking; retry the close().
errorCode = Interop.Sys.Close((int)handle);
GlobalLog.Print("SafeCloseSocket::ReleaseHandle(handle:" + handle.ToString("x") + ") close()#2:" + errorCode.ToString());
#if DEBUG
_closeSocketHandle = handle;
_closeSocketResult = SocketPal.GetSocketErrorForErrorCode((Interop.Error)errorCode);
#endif
if (errorCode == 0 && _asyncContext != null)
{
_asyncContext.Close();
}
return(SocketPal.GetSocketErrorForErrorCode((Interop.Error)errorCode));
}
// The socket could not be made blocking; fall through to the regular abortive close.
}
// By default or if CloseAsIs() path failed, set linger timeout to zero to get an abortive close (RST).
var linger = new Interop.libc.linger {
l_onoff = 1,
l_linger = 0
};
errorCode = Interop.libc.setsockopt((int)handle, Interop.libc.SOL_SOCKET, Interop.libc.SO_LINGER, &linger, (uint)sizeof(Interop.libc.linger));
#if DEBUG
_closeSocketLinger = SocketPal.GetSocketErrorForErrorCode((Interop.Error)errorCode);
#endif
if (errorCode == -1)
{
errorCode = (int)Interop.Sys.GetLastError();
}
GlobalLog.Print("SafeCloseSocket::ReleaseHandle(handle:" + handle.ToString("x") + ") setsockopt():" + errorCode.ToString());
if (errorCode != 0 && errorCode != (int)Interop.Error.EINVAL && errorCode != (int)Interop.Error.ENOPROTOOPT)
{
// Too dangerous to try closesocket() - it might block!
return(SocketPal.GetSocketErrorForErrorCode((Interop.Error)errorCode));
}
errorCode = Interop.Sys.Close((int)handle);
#if DEBUG
_closeSocketHandle = handle;
_closeSocketResult = SocketPal.GetSocketErrorForErrorCode((Interop.Error)errorCode);
#endif
GlobalLog.Print("SafeCloseSocket::ReleaseHandle(handle:" + handle.ToString("x") + ") close#3():" + (errorCode == -1 ? (int)Interop.Sys.GetLastError() : errorCode).ToString());
return(SocketPal.GetSocketErrorForErrorCode((Interop.Error)errorCode));
}
