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

Sam Leffler sam at
Sun Jul 24 18:12:20 GMT 2005

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:
> 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).


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