SELinux Permission Documentation

[Ken <mantaray_1 cox net>]

What can be sent and received as rawip to and from kernel_t, and what 
are the limitations of what can be done with the data?  I am interested 
in understanding the security implications of this (and other) SELinux 
permissions.  Is there anyone who can direct me to reference materials 
that explain the security implications of allowing various SELinux 
permissions?