From: Patrick McHardy <kaber@trash.net>
To: Paul LeoNerd Evans <leonerd@leonerd.org.uk>
Cc: netdev@vger.kernel.org
Subject: Re: [PATCH] Socket filter ancilliary data access for skb->dev->type
Date: Thu, 22 Apr 2010 14:28:46 +0200 [thread overview]
Message-ID: <4BD040FE.3000809@trash.net> (raw)
In-Reply-To: <20100422121253.GR19334@cel.leo>
Paul LeoNerd Evans wrote:
> Add an SKF_AD_HATYPE field to the packet ancilliary data area, giving
> access to skb->dev->type, as reported in the sll_hatype field.
>
> When capturing packets on a PF_PACKET/SOCK_RAW socket bound to all
> interfaces, there doesn't appear to be a way for the filter program to
> actually find out the underlying hardware type the packet was captured
> on. This patch adds such ability.
>
> + case SKF_AD_HATYPE:
> + A = skb->dev->type;
> + continue;
I think we should be adding a check whether skb->dev is non-NULL here
since filters can also be attached to netlink sockets. The same applies
to SKF_AD_IFINDEX.
next prev parent reply other threads:[~2010-04-22 12:28 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-22 12:12 [PATCH] Socket filter ancilliary data access for skb->dev->type Paul LeoNerd Evans
2010-04-22 12:28 ` Patrick McHardy [this message]
2010-04-22 13:11 ` Paul LeoNerd Evans
2010-04-22 13:13 ` Patrick McHardy
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