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Date:      Fri, 2 May 2014 23:59:42 +0300
From:      =?UTF-8?B?w5Z6a2FuIEtJUklL?= <ozkan.kirik@gmail.com>
To:        "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>
Subject:   Re: bridge Untagged packets on an interface
Message-ID:  <CAAcX-AE%2B-zmmsSkyixsZUecokyj0KOvS6zxyej27yHTseXN7mg@mail.gmail.com>
In-Reply-To: <CAAcX-AGrSEN2e%2B0avN%2B54R47qF-5FGSKvCftwcMSmdyLN9es3A@mail.gmail.com>
References:  <CAAcX-AGrSEN2e%2B0avN%2B54R47qF-5FGSKvCftwcMSmdyLN9es3A@mail.gmail.com>
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And also i tried ng_bpf + ng_eiface conjuction, but ng_bpf doesnt match
"vlan" filter.

With the script below, ng_bpf always calls ifNotMatch hook.   When the
pattern is "ip", ng_bpf matches frames have both vlan and ip headers.
I think ng_bpf doesnt process ethernet header.  Is there a way to process
ethernet header with ng_bpf ?

Script is below:

#!/bin/sh
ETHER_IF=3Dem0
PATTERN=3D"vlan"
BPFPROG=3D$( tcpdump -s 8192 -ddd ${PATTERN} | \
                    ( read len ; \
                      echo -n "bpf_prog_len=3D$len " ; \
                      echo -n "bpf_prog=3D[" ; \
                      while read code jt jf k ; do \
                          echo -n " { code=3D$code jt=3D$jt jf=3D$jf k=3D$k=
 }" ; \
                      done ; \
                      echo " ]" ) )

echo $BPFPROG

# Shutdown nodes if exists
ngctl shutdown ${ETHER_IF}:
ngctl shutdown vlan_filter:
ngctl shutdown tag0:
ngctl shutdown untag0:

ngctl -f- <<EOF
mkpeer ${ETHER_IF}: bpf lower filter_in
name ${ETHER_IF}:lower vlan_filter
mkpeer vlan_filter: eiface taggedPacket ether
mkpeer vlan_filter: eiface untaggedPacket ether
name vlan_filter:taggedPacket tag0
name vlan_filter:untaggedPacket untag0
msg vlan_filter: setprogram { thisHook=3D"filter_in" ifMatch=3D"taggedPacke=
t"
ifNotMatch=3D"untaggedPacket" $BPFPROG }
EOF
ifconfig ngeth0 up
ifconfig ngeth1 up



On Fri, May 2, 2014 at 11:53 PM, =C3=96zkan KIRIK <ozkan.kirik@gmail.com> w=
rote:

> Hi,
>
> Assume that default vlan untagged and VLAN 10, 20, 30, 40 tagged on switc=
h
> connected to em0 interface.
>
> i am trying to bridge only untagged frames on em0 with em1.
>
> Does if_vlan handle untagged frames?
>
> # ifconfig em0.0 create
> ifconfig: SIOCIFCREATE2: Invalid argument
>
> Any ideas?
>
> Best regards,
>

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