# returns AVM firmware version as integer (i.e. with all dots removed)
get_avm_firmware_version() {
	# use CONFIG_VERSION if set, /etc/.version otherwise
	local v="${CONFIG_VERSION:-$(cat /etc/.version 2>/dev/null || echo 0000)}"
	echo "${v//.}"
}

# returns AVM firmware revision as integer
get_avm_firmware_revision() {
	cat /etc/.revision 2>/dev/null || echo 0
}

is_affected_by_remote_access_vulnerability() {
	# 04.55 is the version of the first firmware with support for remote access (according to AVM)
	# 27349 is the revision of the first firmware remote access vulnerability has been fixed in
	[ $(get_avm_firmware_version) -ge 0455 -a $(get_avm_firmware_revision) -lt 27349 ]
}