Subject: Re: packet handling for IPsec NAT-T
To: Emmanuel Dreyfus <>
From: Jason Thorpe <>
List: tech-kern
Date: 09/24/2004 15:27:40
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On Sep 24, 2004, at 3:09 PM, Emmanuel Dreyfus wrote:

> The userlevel socket owner might want to get non ESP traffic on the
> socket. In that case the sender has to add a non ESP market at the
> beginning of the UDP payload. The kernel will detect that and the 
> packet
> will be handed to userlevel instead of being sent to esp4_input.

Err, not just "might".  From my vague recollection from IPSEC WG 
meetings a few years go, this would be a socket that normally carries 
IKE traffic for the IKE daemon, right?

         -- Jason R. Thorpe <>

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