Very Computer

I am trying to figure out a way to close a single active TCP
connection on Solaris 7, 8, and 9 - at the OS, network or kernel
level without stopping the layer 7 application.  I don't believe there
is
any utilities built in to the OS for doing this.  I am looking
for a freeware/shareware tool or some insight on how to
program such a utility.

Example:

# netstat -an
   Local Address        Remote Address    Swind Send-Q Rwind Recv-Q
State
-------------------- -------------------- ----- ------
.
.
.
192.168.1.1.22       192.168.1.10.1022    24820      0 33580      0
ESTABLISHED
.
.
.
Let's say I want to force this connection to drop withOUT re-booting or
killing
the ssh daemon, or in the case of inetd controlled processes, I do not
want to kill
inetd or all of any particular daemon or processes.

I am currently investigating a way to obtain the socket descriptor and
writing some code
to utilize the "shutdown"  (man 3N)  library routine to close the
connection.

Any suggestions or ideas would be appreciated.

regards,

Pete

similarly, I'm sure there's some interesting use of adb to wade into the
kernel file descriptor table, and mark the fd as closed.

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I just tested:
---
spiff:~ (201)> /opt/SUNWspro/bin/dbx /usr/lib/ssh/sshd
...
(/opt/SUNWspro/bin/../WS6U1/bin/sparcv9/dbx) attach 14034
...
(/opt/SUNWspro/bin/../WS6U1/bin/sparcv9/dbx) call shutdown(5)
---

and the connection was shutdown nicely.

The socket is fd #5 with the stock Solaris 9 sshd, which can easily be
verified with "pfiles <pid of sshd>"

sshd forks a process for each session, so you may just as well kill
the corresponding process. The daemon sshd will not die from this, and
calling shutdown on the socket will have the process exit anyway.

Thomas