No IPFW binary compat across versions ?

[K. Macy]

-STABLE only implies that the ABI does not change during that release
line. It makes no guarantees when moving from one branch to the next.

On Mon, Sep 5, 2011 at 8:31 PM, Arnaud Lacombe <lacombar at gmail.com> wrote:
> Hi,
>
> It would seem that the ipfw binary from a 7.4 install is not
> compatible with the in-kernel implementation of ipfw from 8-STABLE.
> The following command returns junk:
>
> # uname -a
> FreeBSD  8.2-STABLE FreeBSD 8.2-STABLE #0: Mon Sep  5 13:26:22 EDT 2011
>
> # ipfw show
> 65535 79609572473438209 9528064790723821568 count ip from any to any
> # ipfw show
> 65535 80229898894966785 10211949650127093760 skipto 20069 ip from any to any
> # ipfw show
> 65535 81461570961408001 11566216593050435584 divert 20069 ip from any to any
> # ipfw show
> 65535 81826462792941569 11967688918742073344 tee 20069 ip from any to any
> # ipfw show
> 65535 85659197118611457 16196106284901072896  altq ?<301> ip from any to any
> # ipfw show
> 65535 86531998897668097 17160025365645623296 ** unrecognized action 64
> len 19  ip from any to any
> # ipfw show
> 65535 127737816351244289 7272335601653776384 ** unrecognized action
> 158 len 19  ip from any to any
>
> However as the 8-STABLE kernel have COMPAT_FREEBSD7 enabled, I would
> not expect this to happen...
>
> Thanks,
>  - Arnaud
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