Hello Group,

Recently I came across this question asked to me.

Is there any flag you can set so that you are allowed to send more
data on the socket in the calls to sentto/send, than the internal
socket buffer can handle.

Is there any way. And if there is no way then what is a way out.

Thanks for your .

nagrik

In article <1177112559.470678.217590@d57g2000hsg.googlegroups .com>,
Vinay Nagrik <jainarunk@gmail.com> wrote:

> Hello Group,
>
> Recently I came across this question asked to me.
>
> Is there any flag you can set so that you are allowed to send more
> data on the socket in the calls to sentto/send, than the internal
> socket buffer can handle.

If you could, where would it put it?

If it's a UDP socket, and you want it to just drop the data, I think you
could do this by setting the socket to non-blocking mode. The call to
send/sendto would report the error EWOULDBLOCK, and you can choose what
to do with the packet you were trying to send.

--
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***
*** PLEASE don't copy me on replies, I'll read them in the group ***

In article <barmar-987B2D.20252721042007@comcast.dca.giganews.com>,
Barry Margolin <barmar@alum.mit.edu> wrote:

>> Is there any flag you can set so that you are allowed to send more
>> data on the socket in the calls to sentto/send, than the internal
>> socket buffer can handle.

>If it's a UDP socket, and you want it to just drop the data, I think you
>could do this by setting the socket to non-blocking mode. The call to
>send/sendto would report the error EWOULDBLOCK, and you can choose what
>to do with the packet you were trying to send.

Whether that makes any sense depends on which flavor of sockets is
involved. In the flavor I feel most comfortable with, whether you use
a non-blocking socket or not, sendto() does not block if you call it
too often. 4.*BSD style sendto() instead fails with ENOBUFS. To see
if someone had changed things when I wasn't looking, I just now tested
sending to port 9 from a FreeBSD 6.2 system. See
http://www.google.com/search?q=enobufs


Vernon Schryver vjs@rhyolite.com

On Apr 20, 4:42 pm, Vinay Nagrik <jainar...@gmail.com> wrote:
> Hello Group,
>
> Recently I came across this question asked to me.
>
> Is there any flag you can set so that you are allowed to send more
> data on the socket in the calls to sentto/send, than the internal
> socket buffer can handle.
>
> Is there any way. And if there is no way then what is a way out.

What is the problem? If you need to send more data than the buffer can
hold, send the data later. If you literally have no place to put the
data, either discard it or disconnect the client as is appropriate for
the network protocol you are using.

DS