FIN_WAIT_[1,2] and LAST_ACK

[Chuck Swiger]

Brandon Erhart wrote:
> I want to explicitly get it out of those states, without any help from 
> the other end. What must I modify to achieve this?

See tcp_usrclosed() in /usr/src/sys/netinet/tcp_usrreq.c.  Replace that code 
with something like (untested):

    tp->t_state = TCPS_CLOSED;
    tp = tcp_close(tp);
    return tp;

...and you'll break your TCP/IP stack in the fashion you've asked for.
If other things break too, you can keep all of the pieces.  :-)

-- 
-Chuck