Re: [PATCH] tcp: ioctl type SIOCOUTQNSD returns amount of data not sent
Alan Cox <[email protected]>
| Newsgroups | gmane.linux.kernel,gmane.linux.network.general |
|---|---|
| Message-ID | <[email protected]> |
On Wed, 23 Feb 2011 13:14:10 +0100 Steffen Sledz <[email protected]> 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 <[email protected]> > > --- > > 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