netdev - Re: [PATCH iproute2 net 0/8] tc/act_pedit: Support offset relative to conventional header

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Date:   Wed, 3 May 2017 09:27:31 +0300
From:   Amir Vadai <amir@...ai.me>
To:     Stephen Hemminger <stephen@...workplumber.org>
Cc:     netdev@...r.kernel.org, Or Gerlitz <ogerlitz@...lanox.com>,
        Jamal Hadi Salim <jhs@...atatu.com>
Subject: Re: [PATCH iproute2 net 0/8] tc/act_pedit: Support offset relative
 to conventional header

On Mon, May 01, 2017 at 09:26:25AM -0700, Stephen Hemminger wrote:
> On Sun, 23 Apr 2017 15:53:48 +0300
> Amir Vadai <amir@...ai.me> wrote:
> 
> > Hi Stephen,
> > 
> > This patchset extends pedit to support modifying a field in an offset relative
> > to the conventional network headers (kenrel support was added [1] in 4.11 rc1).
> > Without the extended pedit, user could specify fields in TCP and ICMP headers,
> > but the kernel code was using an offset relative to the begining of the IP
> > header. This will break if IP header length is greater than the minimal value
> > of 20, or if L3 is not IPv4.
> > 
> > It also introduces support in manipulating ETH, TCP, UDP and IP.ttl fields and
> > a new command to increase/decrease the value of a field (current use case is IP.ttl).
> > 
> > Since there might be deployments already using pedit, special consideration was
> > taken, not to break those scripts - only by specifying the special keyword
> > 'ex', the extended capabilities are available, thus there should be no impact
> > on existing scripts.
> > Also, the new code can live together with rules added by the old code. It
> > supports both the old netlink and the new one.
> > 
> > This patchset is against the master and not net-next as the functionality was
> > added in 4.11
> > 
> > Thanks,
> > Amir
> > 
> > [1] - 71d0ed7079df ("net/act_pedit: Support using offset relative to the
> >                      conventional network headers")

[...]

> 
> Applied. Then I cleaned up long lines

Thanks. Will make sure to clean up long lines in future patches.