Is there an API for ipfw?

[Mikhail Teterin]

Hi!

I'm writing an application that, needs to be able to quickly alter the 
bandwidth between another machine and the host.

The only way I can do that -- without another machine's cooperation -- is by 
using the firewall, such as the dummynet functionality of ipfw.

Is there any way to create/alter such a pipe from a C-program without using 
system("ipfw ....")?

If not ipfw, perhaps, other firewall modules in FreeBSD-6.x?

Thanks a lot!

	-mi