netdev - Re: [RFC PATCH ipsec-next] udpencap: Remove Obsolete UDP_ENCAP_ESPINUDP_NON

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Message-ID: <CAF=yD-LUgdkZpNW9W2RV0f4PqYOkOCTRWGi6A7B7LZ1Q9bkM4Q@mail.gmail.com>
Date: Tue, 24 Oct 2023 13:23:51 -0400
From: Willem de Bruijn <willemdebruijn.kernel@...il.com>
To: antony.antony@...unet.com
Cc: Steffen Klassert <steffen.klassert@...unet.com>, Florian Westphal <fw@...len.de>, 
	Andreas Gruenbacher <agruenba@...hat.com>, devel@...ux-ipsec.org, netdev@...r.kernel.org
Subject: Re: [RFC PATCH ipsec-next] udpencap: Remove Obsolete
 UDP_ENCAP_ESPINUDP_NON_IKE Support

On Tue, Oct 24, 2023 at 4:42 AM Antony Antony <antony.antony@...unet.com> wrote:
>
> The UDP_ENCAP_ESPINUDP_NON_IKE mode, introduced into the Linux kernel
> in 2004 [2], has remained inactive and obsolete for an extended period.
>
> This mode was originally defined in an early version of an IETF draft
> [1] from 2001. By the time it was integrated into the kernel in 2004 [2],
> it had already been replaced by UDP_ENCAP_ESPINUDP [3] in later
> versions of draft-ietf-ipsec-udp-encaps, particularly in version 06.
>
> Over time, UDP_ENCAP_ESPINUDP_NON_IKE has lost its relevance, with no
> known use cases.

I don't know how important this is, but a quick online search brought
up one package: https://github.com/rdratlos/racoon-ipsec-tools.git

Behind #if defined(ENABLE_NATT_00) || defined(ENABLE_NATT_01), so
probably there unused too.