skb_* function to get pointer to udp payload

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* skb_* function to get pointer to udp payload
@ 2012-08-07 13:42 Arif Hossain
  2012-08-08 18:03 ` Jan Engelhardt
  0 siblings, 1 reply; 2+ messages in thread
From: Arif Hossain @ 2012-08-07 13:42 UTC (permalink / raw)
  To: netfilter-devel

Hi,

I need to get a pointer to udp payload in my xtables module in following
scenario:

1. From NF_INET_LOCAL_PREROUTING hook. As Transport headers are not yet
initialized, may be i need to play with offsets like
skb_header_pointer(skb, par->thoff,....). Not sure if its correct to use
skb_header_pointer this way though.

2. From NF_INET_LOCAL_OUT. This time as transport fields are already
initialized, i guess there is a direct function to get pointer to udp
payload.

Thanks in advance. 
-- 
Cheers

aft
aftnix@gmail.com

^ permalink raw reply	[flat|nested] 2+ messages in thread

* Re: skb_* function to get pointer to udp payload
  2012-08-07 13:42 skb_* function to get pointer to udp payload Arif Hossain
@ 2012-08-08 18:03 ` Jan Engelhardt
  0 siblings, 0 replies; 2+ messages in thread
From: Jan Engelhardt @ 2012-08-08 18:03 UTC (permalink / raw)
  To: Arif Hossain; +Cc: netfilter-devel

On Tuesday 2012-08-07 15:42, Arif Hossain wrote:

>Hi,
>
>I need to get a pointer to udp payload in my xtables module in following
>scenario:
>
>1. From NF_INET_LOCAL_PREROUTING hook. As Transport headers are not yet
>initialized, may be i need to play with offsets like
>skb_header_pointer(skb, par->thoff,....). Not sure if its correct to use
>skb_header_pointer this way though.

It is correct to use skb_h_p in either chain.

^ permalink raw reply	[flat|nested] 2+ messages in thread

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2012-08-07 13:42 skb_* function to get pointer to udp payload Arif Hossain
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