i386/129218: freebsd6.2 kernel cannot support ipsec "-E null -A hmac-sha1", FreeBSD7.0 kernel cannot support -A aes-xcbc-mac

[wang_jiabo]

FreeBSD-gnats-submit at FreeBSD.org wrote:
> Thank you very much for your problem report.
> It has the internal identification `i386/129218'.
> The individual assigned to look at your
> report is: freebsd-i386. 
>
> You can access the state of your problem report at any time
> via this link:
>
> http://www.freebsd.org/cgi/query-pr.cgi?pr=129218
>
>   
>> Category:       i386
>> Responsible:    freebsd-i386
>> Synopsis:       freebsd6.2 kernel cannot support ipsec "-E null -A hmac-sha1", FreeBSD7.0 kernel cannot support -A aes-xcbc-mac
>> Arrival-Date:   Thu Nov 27 03:10:01 UTC 2008
>>     
How to close the bug, I found that freebsd 6.3 can reslove the problem.
but i do not know why FreeBSD7.0 can not support ipsec aes-xcbc-mac and 
null  AH
Thanks