From: jamal <hadi@cyberus.ca>
To: Xiaofei Wu <xiaofei_wu08@yahoo.com>
Cc: stephen.hemminger@vyatta.com, linux netdev <netdev@vger.kernel.org>
Subject: Re: [iproute2] tc pedit modify ethhdr ?
Date: Wed, 24 Mar 2010 09:50:52 -0400 [thread overview]
Message-ID: <1269438652.4089.22.camel@bigi> (raw)
In-Reply-To: <370745.69240.qm@web111619.mail.gq1.yahoo.com>
On Wed, 2010-03-24 at 05:31 -0700, Xiaofei Wu wrote:
> but the size of ethhdr is 14 bytes, 14 is not multiple of 4 .
> How to use 'tc ... pedit ...' modify a packet's h_dest and h_source
> of ethhdr ?
> Use ' ... pedit munge offset -14 u16 set 0x0090 munge offset -12 u32 set 0x9600030a ... ' or
> use ' ... pedit munge offset -16 u32 ... munge offset -12 ... ' ?
>
0 is at ip header.
dst MAC starts at -14
src MAC at -8
ethertype at -2
Example:
tc filter add dev eth0 parent ffff: protocol ip prio 10 u32 \
match ip src 192.168.1.10/32 flowid 1:2 \
action pedit munge offset -14 u16 set 0x0000 \
munge offset -12 u32 set 0x00010100 \
munge offset -8 u32 set 0x0aaf0100 \
munge offset -4 u32 set 0x0008ec06 pipe \
action mirred egress redirect dev eth1
cheers,
jamal
next prev parent reply other threads:[~2010-03-24 13:50 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-24 12:31 [iproute2] tc pedit modify ethhdr ? Xiaofei Wu
2010-03-24 13:50 ` jamal [this message]
2010-03-25 2:59 ` Xiaofei Wu
2010-03-25 3:21 ` jamal
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