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# macchanger module for net-scripts
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# Version 1.0.3
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# Copyright (c) 2004 Gentoo Foundation
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# Distributed under the terms of the GNU General Public License V2
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# Contributed by Roy Marples (uberlord@gentoo.org)
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# char* macchanger_provides(void)
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#
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# Returns a string to change module definition for starting up
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macchanger_provides() {
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echo "macchanger"
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}
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# void macchanger_depend(void)
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#
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# Sets up the dependancies for the module
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macchanger_depend() {
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before interface wireless
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}
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# bool macchanger_check_installed(void)
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#
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# Returns 1 if macchanger is installed, otherwise 0
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macchanger_check_installed() {
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[[ -x /sbin/macchanger ]] && return 0
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${1:-false} && eerror "For changing MAC addresses, emerge net-analyzer/macchanger"
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return 1
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}
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# bool macchanger_check_depends(void)
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#
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# Checks to see if we have the needed functions
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macchanger_check_depends() {
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local f
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for f in interface_variable interface_get_mac_address; do
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[[ $( type -t ${f} ) == function ]] && continue
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eerror "macchanger: missing required function ${f}\n"
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return 1
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done
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return 0
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}
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# bool macchanger_pre_start(char *iface)
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#
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# Configures the MAC address for iface
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macchanger_pre_start() {
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local iface=${1} mac opts
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interface_exists ${iface} true || return 1
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local ifvar=$( interface_variable ${1} )
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eval mac=\"\$\{mac_${ifvar}\}\"
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[[ -z ${mac} ]] && return 0
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mac=$( echo ${mac} | tr '[:upper:]' '[:lower:]' )
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case "${mac}" in
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# specific mac-addr, i wish there were a shorter way to specify this
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[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]) opts="${opts} --mac=${mac}" ;;
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# increment MAC address, default macchanger behavior
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increment) opts="${opts}" ;;
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# randomize just the ending bytes
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random-ending) opts="${opts} -e" ;;
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# keep the same kind of physical layer (eg fibre, copper)
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random-samekind) opts="${opts} -a" ;;
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# randomize to any known vendor of any physical layer type
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random-anykind) opts="${opts} -A" ;;
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# fully random bytes
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random-full) opts="${opts} -r" ;;
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# default case is just to pass on all the options
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*) opts="${opts} ${mac}" ;;
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esac
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# The interface needs to be up for macchanger to work most of the time
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interface_down ${iface}
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ebegin "Changing MAC address of ${iface}"
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mac=$( /sbin/macchanger ${opts} ${iface} 2>/dev/null | awk '/Faked MAC:/ { print toupper($3) }' )
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# Sometimes the interface needs to be up ....
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if [[ -z ${mac} ]]; then
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interface_up ${iface}
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mac=$( /sbin/macchanger ${opts} ${iface} 2>/dev/null | awk '/Faked MAC:/ { print toupper($3) }' )
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fi
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if [[ -z ${mac} ]]; then
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eend 1 "Failed to set MAC address"
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return 1
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fi
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eend 0
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eindent
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einfo "changed to ${mac}"
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eoutdent
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return 0 #important
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}
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