ip nat limitation

[newsham_(_at_)_lava_(_dot_)_net (Tim Newsham)]

>From the ipnat man page:

  BUGS
     bimap should really only be used with single IP addresses (x.x.x.x/32).
     Bimapping other CIDR ranges will result in unexpected, and possibly ran-
     dom mappings into the destination address block.

How hard would it be to overcome this limitation?  Ideally anytime
an address mapping like   1.1.0.0/16 -> 2.2.0.0/16 
was in place (ie. the address block size was the same), the
mapping would be one to one, leaving the low bits in tact
(ie. 1.1.0.1 -> 2.2.0.1, 1.1.3.3 -> 2.2.3.3).

I sent mail to Darren Reed (listed as ipnat author), but have
not heard back from him yet.

                                            Tim N.