* Re: Problems with corruption sending packets from a module
[not found] <20010820170424.A713@stu163.keble.ox.ac.uk>
@ 2001-08-20 22:57 ` Alexey Kuznetsov
2001-08-21 18:47 ` Ian Lynagh
0 siblings, 1 reply; 2+ messages in thread
From: Alexey Kuznetsov @ 2001-08-20 22:57 UTC (permalink / raw)
To: Ian Lynagh; +Cc: linux-kernel
Hello!
> In case someone is reading the archives and has a similar problem, this
> appears to be the cause of the trouble. If I do
> skb->data += sizeof(struct ethhdr);
> then it's fine.
It is not fine at all... You are not allowed to change skb->data,
skb->len etc.
> I guess I ought to be using skb_reserve really
You guess right: skb_reserve(), skb_put() and other functions
provided by skbuff.h. But not to touch pointers directly,
they have dependancies, which are known only to skbuff.[hc].
Alexey
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: Problems with corruption sending packets from a module
2001-08-20 22:57 ` Problems with corruption sending packets from a module Alexey Kuznetsov
@ 2001-08-21 18:47 ` Ian Lynagh
0 siblings, 0 replies; 2+ messages in thread
From: Ian Lynagh @ 2001-08-21 18:47 UTC (permalink / raw)
To: Alexey Kuznetsov; +Cc: linux-kernel
On Tue, Aug 21, 2001 at 02:57:08AM +0400, Alexey Kuznetsov wrote:
> Hello!
>
> > In case someone is reading the archives and has a similar problem, this
> > appears to be the cause of the trouble. If I do
> > skb->data += sizeof(struct ethhdr);
> > then it's fine.
>
> It is not fine at all... You are not allowed to change skb->data,
> skb->len etc.
Sorry, yes, I meant "it works" which isn't quite the same thing :-)
Ian, struggling against a lack of decent documentation but slowly
getting there, I think!
^ permalink raw reply [flat|nested] 2+ messages in thread
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[not found] <20010820170424.A713@stu163.keble.ox.ac.uk>
2001-08-20 22:57 ` Problems with corruption sending packets from a module Alexey Kuznetsov
2001-08-21 18:47 ` Ian Lynagh
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