
This directory contains two examples how you can extend
ModSecurity without having to touch it directly, simply
by creating custom Apache modules.

1)

Module mod_tfn_reverse.c creates a custom transformation
function "reverse" that reverses the content it receives
on input.

To compile simply do:

  apxs -cia mod_tfn_reverse.c

2)

Module mod_op_strstr.c creates a custom operator "strstr"
that implements fast matching using the Boyer-Moore-Horspool
algorithm.

Compiling this module is more involved because it requires
access to ModSecurity structures. For example:

  apxs -I<MODSECURITY_SOURCE_CODE> -I/usr/include/libxml2 -cia mod_op_strstr.c

