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# Copyright (c) 2004-2006 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# Contributed by Roy Marples (uberlord@gentoo.org)
# void macchanger_depend(void)
#
# Sets up the dependancies for the module
macchanger_depend() {
before macnet
functions interface_get_mac_address interface_set_mac_address
}
# void macchanger_expose(void)
#
# Expose variables that can be configured
macchanger_expose() {
variables mac
}
# bool macchanger_pre_start(char *iface)
#
# Configures the MAC address for iface
macchanger_pre_start() {
# We don't change MAC addresses from background
${IN_BACKGROUND} && return 0
local iface="$1" mac opts ifvar="$(bash_variable "$1")"
mac="mac_${ifvar}"
[[ -z ${!mac} ]] && return 0
interface_exists "${iface}" true || return 1
ebegin "Changing MAC address of ${iface}"
# The interface needs to be up for macchanger to work most of the time
interface_down "${iface}"
mac="$(echo "${!mac}" | tr '[:upper:]' '[:lower:]')"
case "${mac}" in
# specific mac-addr, i wish there were a shorter way to specify this
[0-9a-f][0-9a-f]:[0-9a-f][0-9a-f]:[0-9a-f][0-9a-f]:[0-9a-f][0-9a-f]:[0-9a-f][0-9a-f]:[0-9a-f][0-9a-f])
# We don't need macchanger to change to a specific mac address
interface_set_mac_address "${iface}" "${mac}"
eend "$?"
if [[ $? == "0" ]] ; then
mac="$(interface_get_mac_address "${iface}")"
eindent
einfo "changed to ${mac}"
eoutdent
return 0
fi
;;
# increment MAC address, default macchanger behavior
increment) opts="${opts}" ;;
# randomize just the ending bytes
random-ending) opts="${opts} -e" ;;
# keep the same kind of physical layer (eg fibre, copper)
random-samekind) opts="${opts} -a" ;;
# randomize to any known vendor of any physical layer type
random-anykind) opts="${opts} -A" ;;
# fully random bytes
random-full) opts="${opts} -r" ;;
# default case is just to pass on all the options
*) opts="${opts} ${mac}" ;;
esac
if [[ ! -x /sbin/macchanger ]] ; then
eerror "For changing MAC addresses, emerge net-analyzer/macchanger"
return 1
fi
mac="$( /sbin/macchanger ${opts} "${iface}" \
| sed -n -e 's/^Faked MAC:.*\<\(..:..:..:..:..:..\)\>.*/\U\1/p' )"
# Sometimes the interface needs to be up ....
if [[ -z ${mac} ]] ; then
interface_up "${iface}"
mac="$( /sbin/macchanger ${opts} "${iface}" \
| sed -n -e 's/^Faked MAC:.*\<\(..:..:..:..:..:..\)\>.*/\U\1/p' )"
fi
if [[ -z ${mac} ]] ; then
eend 1 "Failed to set MAC address"
return 1
fi
eend 0
eindent
einfo "changed to ${mac}"
eoutdent
return 0 #important
}
# vim: set ft=sh ts=4 :
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