register callback for special packet types like udp and icmp?

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* register callback for special packet types like udp and icmp?
@ 2008-04-11 12:36 Thomas Mader
  2008-04-11 12:41 ` Jan Engelhardt
  0 siblings, 1 reply; 2+ messages in thread
From: Thomas Mader @ 2008-04-11 12:36 UTC (permalink / raw)
  To: Netfilter Development Mailinglist

Hello,

is there a way to define callback (match) functions for special packet 
types like udp and icmp? I would like to have a match function which 
only reacts on udp and icmp packets. Is this possible in a kernelspace 
module and/or in a libnetfilter_queue daemon and how?

thanks in advance,
Thomas

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

* Re: register callback for special packet types like udp and icmp?
  2008-04-11 12:36 register callback for special packet types like udp and icmp? Thomas Mader
@ 2008-04-11 12:41 ` Jan Engelhardt
  0 siblings, 0 replies; 2+ messages in thread
From: Jan Engelhardt @ 2008-04-11 12:41 UTC (permalink / raw)
  To: Thomas Mader; +Cc: Netfilter Development Mailinglist

On Friday 2008-04-11 14:36, Thomas Mader wrote:

> Hello,
>
> is there a way to define callback (match) functions for special packet types
> like udp and icmp? I would like to have a match function which only reacts on
> udp and icmp packets. Is this possible in a kernelspace module and/or in a
> libnetfilter_queue daemon and how?

Both would work. For kernel modules, it's as simple as
specifying .proto = IPPROTO_UDP or IPPROTO_ICMP, see
http://jengelh.medozas.de/documents/Netfilter_Modules.pdf

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

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2008-04-11 12:36 register callback for special packet types like udp and icmp? Thomas Mader
2008-04-11 12:41 ` Jan Engelhardt

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