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Date:      Fri, 31 Jan 2003 22:53:53 +0100 (CET)
From:      Helge Oldach <stable31jan03@oldach.net>
To:        sam@errno.com (Sam Leffler)
Cc:        freebsd-stable@freebsd.org
Subject:   Re: HEADS UP: fast ipsec committed
Message-ID:  <200301312153.h0VLrs0Y030635@sep.oldach.net>
In-Reply-To: <174301c2c36b$00f68c70$52557f42@errno.com> from Sam Leffler at "Jan 23, 2003  9:39:45 pm"

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Sam Leffler:
> I just commited my "Fast IPsec" support.  This is an implementation of the
> IPsec protocols that makes use of the kernel crypto framework.
> 
[...]
>
> There should be minimal user-visible differences from the KAME IPsec code.
> In particular you should be able to use racoon, setkey, isakmpd, or whatever
> as with KAME.

I had problems with racoon. My previous buildworld and kernel was of
January 19th while today's build (January 31st) effectively disabled
racoon. After tracing around a bit it seemed that racoon had problems
to parse its configuration file and some tokens were tracked down to
the wrong constants. I am using hmac_md5 authentication and racoon was
complaining "algorithm 1 not supported". Yes - "1" instead of a string
with the algorithm name.

It turned out that this (abridged) change was the culprit:

diff -r /usr/include/net/pfkeyv2.h /mnt/usr/include/net/pfkeyv2.h
1c1
< /*	$FreeBSD: src/sys/net/pfkeyv2.h,v 1.4.2.4 2003/01/24 05:11:33 sam Exp $	*/
---
> /*	$FreeBSD: src/sys/net/pfkeyv2.h,v 1.4.2.3 2001/10/24 19:49:13 ume Exp $	*/
303,305c303,305
< #define SADB_AALG_MD5HMAC	2
< #define SADB_AALG_SHA1HMAC	3
< #define SADB_AALG_MAX		251
---
> #define SADB_AALG_MD5HMAC	1	/*2*/
> #define SADB_AALG_SHA1HMAC	2	/*3*/
> #define SADB_AALG_MAX		8

Reinstalling racoon instantly fixed the issue. Probably other ISAKMP
daemons (e.g. isakmpd) are affected as well.

Note that quite a number of other constants were redefined by this
change, not just the ones mentioned in the diff excerpt above.

Regards,
Helge

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