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# Copyright (c) 2007-2008 Roy Marples <roy@marples.name>
# Released under the 2-clause BSD license.
# shellcheck shell=sh disable=SC1008
macchanger_depend()
{
before macnet
# no program 'macchanger', as we have partial functionality without it
}
_config_vars="$_config_vars mac"
macchanger_pre_start()
{
# We don't change MAC addresses from background
yesno ${IN_BACKGROUND} && return 0
local mac= opts= try= output= rc=
eval mac=\$mac_${IFVAR}
[ -z "${mac}" ] && return 0
_exists true || return 1
ebegin "Changing MAC address of ${IFACE}"
# The interface needs to be up for macchanger to work most of the time
_down
mac=$(echo "${mac}" | tr '[:upper:]' '[:lower:]')
local hex="[0-9a-f][0-9a-f]"
case "${mac}" in
# specific mac-addr
${hex}:${hex}:${hex}:${hex}:${hex}:${hex})
# We don't need macchanger to change to a specific
# mac address
_set_mac_address "${mac}"
if eend "$?"; then
mac=$(_get_mac_address)
eindent
einfo "changed to ${mac}"
eoutdent
_up
return 0
fi
;;
# increment MAC address, default macchanger behavior
increment) opts="${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="${opts} -A";;
# fully random bytes
random-full|random) opts="${opts} -r";;
# default case is just to pass on all the options
*) opts="${opts} -m ${mac}";;
esac
if ! command -v macchanger >/dev/null; then
eerror "For changing MAC addresses, emerge net-analyzer/macchanger"
return 1
fi
for try in 1 2; do
# Sometimes the interface needs to be up
[ "${try}" -eq 2 ] && _up
output=$(macchanger ${opts} "${IFACE}")
rc=$?
[ "${rc}" -eq 0 ] && break
done
if [ "${rc}" -ne 0 ]; then
eerror "${output}"
eend 1 "Failed to set MAC address"
return 1
fi
eend 0
eindent
newmac=$(_get_mac_address)
einfo "changed to ${newmac}"
eoutdent
return 0
}
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