Netgraph - ng_bpf help (first experience)

[Eugene Grosbein]

On Wed, Oct 11, 2006 at 01:02:50PM -0300, Eduardo Meyer wrote:
> >> ngctl msg my_node: setprogram { thisHook="hook1" ifMatch="hook2"
> >> ifNotMatch="hook3" bpf_prog_len=16 bpf_prog=[ { code=40 jt=0 jf=0 k=12
> >> } { code=21 jt=0 jf=4 k=34525 } { code=48 jt=0 jf=0 k=20 } { code=21
> >> jt=0 jf=11 k=6 } { code=40 jt=0 jf=0 k=56 } { code=21 jt=8 jf=9 k=80 }
> >> { code=21 jt=0 jf=8 k=2048 } { code=48 jt=0 jf=0 k=23 } { code=21 jt=0
> >> jf=6 k=6 } { code=40 jt=0 jf=0 k=20 } { code=69 jt=4 jf=0 k=8191 } {
> >> code=177 jt=0 jf=0 k=14 } { code=72 jt=0 jf=0 k=16 } { code=21 jt=0
> >> jf=1 k=80 } { code=6 jt=0 jf=0 k=8192 } { code=6 jt=0 jf=0 k=0 } ] } }
> >>
> >> How should I create "my_node" before?
> >
> >Absolutely.
> 
> Absolutely what? I meant "how should I create", say "how to create" my
> node. The man page does not mentions anything about it.

Sorry, I've misread your question.

Take a look at /usr/ports/net-mgmt/ng_ipacct/files/ng_ipacct.conf.
There is a working example of NETGRAPH web using ng_bpf and a set of commands
that builds it. Search for 'EXAMPLE 4' there and 'ng_ipacct_bpf_ether_start'
above the example.

You may read some generic documentation about netgraph also,
it does not hurt :-)

Eugene Grosbein