On Sun, 3 Nov 2002, Andras Kis-Szabo wrote:

quoted

 - export route6_me_harder() as ip6_route_harder() and
   use it from net/ipv6/netfilter/ip6_queue.c.

Opsz!
At the extension parser code we got that decision that we should use
our own parser in the Netfilter code! (And we should not to trust in the
kernel.)
This patch removes one function from the Netfilter code and forces the
Netfilter to use a similar function from the kernel's one!

And why is that a problem?

If there is a problem in main kernel code, it should fixed.  If the 
netfilter version is better, the main kernel code should be changed.

Are there specific reasons to keep them separate?

-- 
Pekka Savola                 "Tell me of difficulties surmounted,
Netcore Oy                   not those you stumble over and fall"
Systems. Networks. Security.  -- Robert Jordan: A Crown of Swords