> the changes to implement udp hangup are trivial tho:
>
> diff -r 51564dc1adae sys/src/9/ip/udp.c
> --- a/sys/src/9/ip/udp.c        Thu Nov 13 10:23:53 2014 +0100
> +++ b/sys/src/9/ip/udp.c        Thu Nov 13 15:42:24 2014 +0100
> @@ -518,6 +518,11 @@
>
>         ucb = (Udpcb*)c->ptcl;
>         if(n == 1){
> +               if(strcmp(f[0], "hangup") == 0){
> +                       qhangup(c->rq, nil);
> +                       qhangup(c->wq, nil);
> +                       return nil;
> +               }
>

I see.
Going to try.

Pavel