cvs commit: src/sys/net bpf.c bpfdesc.h

[Brooks Davis]

On Sun, Jul 24, 2005 at 11:17:45AM -0700, Sam Leffler wrote:
> Christian S.J. Peron wrote:
> >On Sun, Jul 24, 2005 at 05:21:18PM +0000, Christian S.J. Peron wrote:
> >
> >>csjp        2005-07-24 17:21:18 UTC
> >>
> >> FreeBSD src repository
> >>
> >> Modified files:
> >>   sys/net              bpf.c bpfdesc.h 
> >> Log:
> >> Introduce new sysctl variable: net.bpf.stats. This sysctl variable can
> >> be used to pass statistics regarding dropped, matched and received
> >> packet counts from the kernel to user-space. While we are here
> >> introduce a new counter for filtered or matched packets. We currently
> >> keep track of packets received or dropped by the bpf device, but not
> >> how many packets actually matched the bpf filter.
> >> 
> >
> >
> >I have a userspace program to display these stats:
> >
> >http://people.freebsd.org/~csjp/bpfstat.1122182321.shar
> >
> >An example of the output is:
> >
> >$ bpfstat
> >  pid   netif  flags   recv drop  match sblen hblen command
> >10750     rl0  p--s-    260    0    260  2426     0 tcpdump
> >$
> >
> >I plan to move this into base, but I would like some people
> >to test/review it first.
> >
> 
> There are numerous little programs like this looking for a common home. 
>  I suggest you stick your program in the tools area until we can 
> resolve where to integrate them.  I've wanted to overhaul netstats in a 
> manner similar to ifconfig so it's easy to add code like this and/or 
> write these as modules that are dynamically loaded (e.g. so vendors can 
> distribute add-ons).

Work is underway on cleaning up the libkvm bits of netstat at the moment
so now is not the best time for major surgery.  I do agree that a
modular rewrite similar to ifconfig is the way to go.

-- Brooks

-- 
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