iptables version defines

[Thomas Jarosch <thomas.jarosch@intra2net.com>]

Hello netfilter coreteam,

I'm currently looking for a way to support ipt_ACCOUNT
both for iptables 1.4.0 and iptables 1.4.1. Some function
names changed (addr_to_dotted() -> ipaddr_to_numeric())
and it would be easy to #ifdef around them.

The linux kernel provides multiple defines for its version number,
while iptables only supports a char* version string.

Would it make sense to add something like the kernel version defines
so one could write code like this:

#if IPTABLES_VERSION_CODE < IPTABLES_VERSION(1,4,1)
	abc
#else
	xyz
#endif

?

Another solution would be to have an "iptables" and "iptables-1.4.1"
directory in the pom archive, though I don't know if that is supported.
(and would lead to code duplication.)

Thanks,
Thomas