On Wed, 23 Feb 2011 13:14:10 +0100
Steffen Sledz <sledz@xxxxxxxxxxxx> wrote:
> Am 05.10.2010 11:32, schrieb Mario Schuknecht:
> > In contrast to SIOCOUTQ which returns the amount of data sent
> > but not yet acknowledged plus data not yet sent this patch only
> > returns the data not sent.
> >
> > For various methods of live streaming bitrate control it may
> > be helpful to know how much data are in the tcp outqueue are
> > not sent yet.
> >
> > Signed-off-by: Mario Schuknecht <m.schuknecht@xxxxxxxxxxxx>
> > ---
> > include/asm-generic/ioctls.h | 1 +
> > include/linux/sockios.h | 1 +
> > net/ipv4/tcp.c | 9 +++++++++
> > 3 files changed, 11 insertions(+), 0 deletions(-)
> >
> > diff --git a/include/asm-generic/ioctls.h b/include/asm-generic/ioctls.h
> > index a321665..b87115b 100644
> > --- a/include/asm-generic/ioctls.h
> > +++ b/include/asm-generic/ioctls.h
> > @@ -72,6 +72,7 @@
> > #define TCSETXF 0x5434
> > #define TCSETXW 0x5435
> > #define TIOCSIG _IOW('T', 0x36, int) /* pty: generate signal */
> > +#define TIOCOUTQNSD 0x5437
These are tty not socket ioctl codes. For various historical reasons some
of them got sort of emulated by the socket layer in Unix and thus in
Linux.
If you plan to add one to Linux then please post the accompanying *tty
layer* patches and reasoning, otherwise if it is socket only please stick
to the socket ioctl.
Alan
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