ng_patch and 802.11Q

[Bear]

Hi Gleb,
I read the script you given but still no clue :-(

On 2013/11/9 11:09 AM, rozhuk.im at gmail.com wrote:
> http://www.netlab.linkpc.net/download/software/FreeBSD/mcastbridge/mcastbr2.
> sh
> http://www.netlab.linkpc.net/forum/index.php?topic=796.0
>
>
>> It seems a good idea... Do you have some example working on ng_ether?
>> The manpage of ng_ether seems no example...
>>
>> On 11/8/2013 6:22 PM, Gleb Smirnoff wrote:
>>> On Fri, Nov 08, 2013 at 02:11:49AM -0330, Bear wrote:
>>> B> Hi all,
>>> B> I want to modify VLAN priority by ng_patch. After reading the
>>> B> manpage of
>>> B> ng_patch(http://www.freebsd.org/cgi/man.cgi?query=ng_patch) and
>> the
>>> B> example it given:
>>> B>
>>> B>  >  /usr/sbin/ngctl -f- <<-SEQ
>>> B>  > 	 mkpeer ipfw: patch 200 in
>>> B>  > 	 name ipfw:200 ttl_add
>>> B>  > 	 msg ttl_add: setconfig { count=1 csum_flags=1 ops=[	 \
>>> B>  > 		 { mode=2 value=3 length=1 offset=8 } ] }
>>> B>  >  SEQ
>>> B>  >  /sbin/ipfw add 150 netgraph 200 ip from any to
>>> B> simplex.remote.net
>>> B>
>>> B> It seems ng_patch can only modify IP header. However, the position
>>> B> of VLAN header is before IP header and after Ethernet header. How
>>> B> can I modify it?
>>>
>>> ipfw allows you to intercept packets at IP layer. Tp modify VLAN
>>> header, you need to capture them earlier. May be ng_ether(4) will
>> help you.
>>>
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