bifcl - 1.6.2-1+b1 main

The bifcl program simply takes a .bif file as input and generates C++
header/source files along with a .bro script that all-together
provide the declaration and implementation of Bro Built-In-Functions
(BIFs), which can then be compiled and shipped as part of a Bro
plugin.
.
A BIF allows one to write arbitrary C++ code and access it via a
function call inside a Bro script. In this way, they can also be used
to access parts of Bro's internal C++ API that aren't already exposed
via their own BIFs.