ng_patch and 802.11Q

[Bear]

On 2013/11/11 上午 03:11, rozhuk.im at gmail.com wrote:
>>   > .lower - packets from/to network adapter  > .upper - packets from/to
>> OS Yes. But if I try to capture on upper:
>>   > nghook -a em0:upper
>> I just got nothing...
> You MAST forward packets lower<->upper by some netgraph nodes.
> If not - OS became unavailable trough this adapter.
> See ng_vlan examples.
>
>>   > http://www.freebsd.org/cgi/query-pr.cgi?pr=161908
>> This link is excellent! Seems it has not been merged to kernel yet?
> It requires to update manual pages, but my English... %)
>
>
>> On 11/10/2013 7:17 AM, rozhuk.im at gmail.com wrote:
>>> http://www.freebsd.org/cgi/query-pr.cgi?pr=161908
>>>
>>>
>>>> -----Original Message-----
>>>> From: Bear [mailto:jilingshu at gmail.com]
>>>> Sent: Saturday, November 09, 2013 11:30 PM
>>>> To: Rozhuk.IM at gmail.com; 'Gleb Smirnoff'
>>>> Cc: freebsd-net at freebsd.org
>>>> Subject: Re: ng_patch and 802.11Q
>>>>
>>>> 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/mc
>>>> as
>>>> tbr2.
>>>>> 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
>>>>>>> B> position of VLAN header is before IP header and after Ethernet
>>>>>>> B> header. How 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.
>>>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>
>>>
>
>