From: "David S. Miller" <davem@redhat.com>
To: Ben Greear <greearb@candelatech.com>
Cc: netdev@oss.sgi.com, tommy.christensen@tpack.net
Subject: Re: [PATCH] Handle shared SKBs in VLAN receive code
Date: Sat, 11 Oct 2003 12:54:26 -0700 [thread overview]
Message-ID: <20031011125426.542e47f7.davem@redhat.com> (raw)
In-Reply-To: <3F88602B.7020603@candelatech.com>
On Sat, 11 Oct 2003 12:55:23 -0700
Ben Greear <greearb@candelatech.com> wrote:
> I have read the sk_buf.h file repeatedly trying to get this all straight
> in my head, and I think I'm still missing things. Is there any other
> documentation around that describes in detail exactly the things you must
> do to handle shared skbs in all contexts?
No there isn't, sorry.
If you just want to read the IP address in a packet, or anything else
in general you have two options:
1) if (pskb_may_pull(skb, len))
goto drop;
After this call, it is guarenteed you may look at
the all bytes up to 'len' from the start of the SKB
using skb->data et al.
2) Use skb_peek_bits().
next prev parent reply other threads:[~2003-10-11 19:54 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-10-10 23:38 [PATCH] Handle shared SKBs in VLAN receive code Tommy Christensen
2003-10-10 23:52 ` Ben Greear
2003-10-11 0:09 ` Tommy Christensen
2003-10-11 19:03 ` Ben Greear
2003-10-11 19:03 ` David S. Miller
2003-10-11 19:55 ` Ben Greear
2003-10-11 19:54 ` David S. Miller [this message]
2003-10-12 10:00 ` Tommy Christensen
2003-10-13 17:19 ` David S. Miller
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