grovel netfilter_conntrack_xxx from applications how?

[Tyler Retzlaff <rtr@xxxxxxxxxxxxxxxxxxxx>]

How does one query netfilter for information about conntrack connections
when they are established, disestablished etc..?

Basically for connections established via conntrack_xxx modules I want
to extract the details and use them in an application on the router.   
Is there
documentation to a C API for doing this?

Thanks