#!/usr/bin/env bash

l_output="" l_output2=""
module_chk() {
	# Check how module will be loaded
	l_loadable="$(modprobe -n -v "$l_mname")"
	if grep -Pq -- '^\h*install \/bin\/(true|false)' <<<"$l_loadable"; then
		l_output="$l_output\n - module: \"$l_mname\" is not loadable: \"$l_loadable\""
	else
		l_output2="$l_output2\n - module: \"$l_mname\" is loadable: \"$l_loadable\""
	fi
	# Check is the module currently loaded
	if ! lsmod | grep "$l_mname" >/dev/null 2>&1; then
		l_output="$l_output\n - module: \"$l_mname\" is not loaded"
	else
		l_output2="$l_output2\n - module: \"$l_mname\" is loaded"
	fi
	# Check if the module is deny listed
	if modprobe --showconfig | grep -Pq -- "^\h*blacklist\h+$l_mname\b"; then
		l_output="$l_output\n - module: \"$l_mname\" is deny listed in: \"$(grep -Pl -- "^\h*blacklist\h+$l_mname\b" /etc/modprobe.d/*)\""
	else
		l_output2="$l_output2\n - module: \"$l_mname\" is not deny listed"
	fi
}
if [ -n "$(find /sys/class/net/*/ -type d -name wireless)" ]; then
	l_dname=$(for driverdir in $(find /sys/class/net/*/ -type d -name wireless | xargs -0 dirname); do basename "$(readlink -f "$driverdir"/device/driver/module)"; done | sort -u)
	for l_mname in $l_dname; do
		module_chk
	done
fi
# Report results. If no failures output in l_output2, we pass
if [ -z "$l_output2" ]; then
	echo -e "\n- Audit Result:\n ** PASS **"
	if [ -z "$l_output" ]; then
		echo -e "\n - System has no wireless NICs installed"
	else
		echo -e "\n$l_output\n"
	fi
else
	echo -e "\n- Audit Result:\n ** FAIL **\n - Reason(s) for audit failure:\n$l_output2\n"
	[ -n "$l_output" ] && echo -e "\n- Correctly set:\n$l_output\n"
	exit 1
fi
