From: Alexei Starovoitov <ast@plumgrid.com>
To: Guy Harris <guy@alum.mit.edu>
Cc: Michal Sekletar <msekleta@redhat.com>,
netdev@vger.kernel.org, Jiri Pirko <jpirko@redhat.com>
Subject: Re: [PATCH] filter: introduce SKF_AD_VLAN_PROTO BPF extension
Date: Wed, 04 Mar 2015 15:47:06 -0800 [thread overview]
Message-ID: <54F7997A.3020604@plumgrid.com> (raw)
In-Reply-To: <6E5AAA23-4000-4C29-BB4E-AA7C05B6F619@alum.mit.edu>
On 3/4/15 1:14 PM, Guy Harris wrote:
>
> On Mar 4, 2015, at 1:03 PM, Alexei Starovoitov <ast@plumgrid.com> wrote:
>
>> the patch is correct and looks clean, but I don't understand
>> the motivation for the patch.
>> There is already SKF_AD_VLAN_TAG_PRESENT. If it is set then only
>> two possible values of vlan_proto are ETH_P_8021Q or ETH_P_8021AD.
>> If there another vlan header inside the packet, it's AD.
>> So you can do the filtering already without adding new bpf extension...
>
> I presume he's referring to
>
> https://github.com/the-tcpdump-group/libpcap/issues/397
>
> or
>
> https://github.com/the-tcpdump-group/libpcap/issues/390
ok. context is clear.
yet, it still sounds like something to fix inside libpcap.
next prev parent reply other threads:[~2015-03-04 23:47 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-04 20:41 [PATCH] filter: introduce SKF_AD_VLAN_PROTO BPF extension Michal Sekletar
2015-03-04 21:03 ` Alexei Starovoitov
2015-03-04 21:14 ` Guy Harris
2015-03-04 23:47 ` Alexei Starovoitov [this message]
2015-03-05 6:50 ` Jiri Pirko
2015-03-05 7:23 ` Alexei Starovoitov
2015-03-05 7:24 ` Michal Kubecek
2015-03-05 7:49 ` Alexei Starovoitov
2015-03-05 8:35 ` Guy Harris
2015-03-05 9:23 ` Michal Kubecek
2015-03-05 2:28 ` Toshiaki Makita
2015-03-05 2:41 ` Alexei Starovoitov
2015-03-05 10:37 ` Michal Sekletar
2015-03-05 16:52 ` Alexei Starovoitov
2015-03-05 20:03 ` Daniel Borkmann
2015-03-05 20:40 ` Alexei Starovoitov
2015-03-06 8:09 ` Michal Sekletar
2015-03-06 9:04 ` Michal Sekletar
2015-03-06 17:23 ` Daniel Borkmann
2015-03-06 14:02 ` Michal Kubecek
2015-03-06 17:54 ` Daniel Borkmann
2015-03-05 8:52 ` Jiri Pirko
2015-03-05 8:57 ` Denis Kirjanov
2015-03-05 14:33 ` Michal Sekletar
2015-03-05 18:12 ` David Miller
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