how to close a socket such that no packet will be sent by TCP to peer

Hi All,
I want a way by which application (or a kernel module working with
application) can close a socket fd
such that TCP will not try to send any pakcets over socket after that.
Not even RST,FIN, ACK.
If app can not do that , can kernel module do something. ??

The problem is also that , the IP adress that TCP connection was using
is no longer with this machine, and it should not send any packet for
that connection. I tried sending fabricated RST packets over raw
socket, but this does not work , as pakcet goes to different machine.
(which has got this machine's IP now.)

I have IP address for this machine, but do not know how i can stop
TCP from sending any packets .

Any suggestion ??

-- Rohit

Rohit wrote:
> Hi All,
> I want a way by which application (or a kernel module working with
> application) can close a socket fd
> such that TCP will not try to send any pakcets over socket after that.
> Not even RST,FIN, ACK.
> If app can not do that , can kernel module do something. ??
>
> The problem is also that , the IP adress that TCP connection was using
> is no longer with this machine, and it should not send any packet for
> that connection. I tried sending fabricated RST packets over raw
> socket, but this does not work , as pakcet goes to different machine.
> (which has got this machine's IP now.)
>
> I have IP address for this machine, but do not know how i can stop
> TCP from sending any packets .
>
> Any suggestion ??
>
> -- Rohit
>

If you do not find the solution in the man pages of close,shutdown or
setsockopt, I guess you have no other way than writing your own TCP/IP
stack using raw sockets...

Bjorn

In article <XxMmi.270$r%(E-Mail Removed)>,
Bjorn Nuyttens <(E-Mail Removed)> wrote:
:Rohit wrote:
:> Hi All,
:> I want a way by which application (or a kernel module working with
:> application) can close a socket fd
:> such that TCP will not try to send any pakcets over socket after that.
:> Not even RST,FIN, ACK.
:> If app can not do that , can kernel module do something. ??
:>
:> The problem is also that , the IP adress that TCP connection was using
:> is no longer with this machine, and it should not send any packet for
:> that connection. I tried sending fabricated RST packets over raw
:> socket, but this does not work , as pakcet goes to different machine.
:> (which has got this machine's IP now.)
:>
:> I have IP address for this machine, but do not know how i can stop
:> TCP from sending any packets .
:>
:> Any suggestion ??
:>
:> -- Rohit
:>
:
:If you do not find the solution in the man pages of close,shutdown or
:setsockopt, I guess you have no other way than writing your own TCP/IP
:stack using raw sockets...

Thinking a bit outside the box for a moment, how about inserting a
firewall rule to DROP any outgoing packets having a source address that
matches the old IP addr?

--
Bob Nichols AT comcast.net I am "RNichols42"