[PATCH 1/3] ws2_32: Implement a basic synchronous TransmitFile (try 3).

[Bruno Jesus]

On Monday, October 12, 2015, Erich E. Hoover <
erich.e.hoover at wine-staging.com> wrote:

> On Mon, Oct 12, 2015 at 9:16 AM, Erich E. Hoover
> <erich.e.hoover at wine-staging.com <javascript:;>> wrote:
> > On Mon, Oct 12, 2015 at 1:25 AM, Alexandre Julliard <julliard at winehq.org
> <javascript:;>> wrote:
> >> "Erich E. Hoover" <erich.e.hoover at wine-staging.com <javascript:;>>
> writes:
> >>
> >>> +    /* set reasonable defaults when requested */
> >>> +    if (!bytes_per_send)
> >>> +        bytes_per_send = 1024;
> >>
> >> Is that the Windows default?  It doesn't seem very reasonable to me, it
> >> won't even fill a network packet.
> >
> > I don't know, it's not in the documentation.  However, if you like I
> > could try to tease it out by doing some tests and running Wireshark on
> > it.  I figured that since the default MTU is 1500 bytes that 1024
> > would be a reasonable power of two less than that to use, but if you
> > think that 2^16 is more reasonable then, obviously, we could use that
> > instead.
>
> Some googling suggests that this value is controlled by
>
> HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\AFD\Parameters\DefaultSendWindow
> and that the default is different depending on the Windows version.
> Apparently "normal" versions default to 64512 and server versions
> default to 655360.  How would you like this to be approached?


Hi all. What about reading SO_SNDBUF where it is available and 1024 where
it is not. Because I think send() will fail if you try to write more than
the kernel buffer size.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.winehq.org/pipermail/wine-devel/attachments/20151013/b56438f3/attachment.html>