On Wed, 2013-07-31 at 16:42 +0200, Daniel Borkmann wrote:

You can use bpfc (git://github.com/borkmann/netsniff-ng.git), it also has
an extensive man page. That should probably do it:

$ cat foo
ld vlant
jneq #4094, drop
ret #-1
drop: ret #0

$ bpfc foo
{ 0x20, 0, 0, 0xfffff02c },
{ 0x15, 0, 1, 0x00000ffe },
{ 0x6, 0, 0, 0xffffffff },
{ 0x6, 0, 0, 0x00000000 },

Thanks Daniel.

If the load of this BPF fails (because its an old kernel), then load
your old filter.