1 files changed, 102 insertions, 0 deletions
diff --git a/net-scripts/net/macchanger.sh b/net-scripts/net/macchanger.sh
new file mode 100644
index 0000000..6331997
--- /dev/null
+++ b/net-scripts/net/macchanger.sh
@@ -0,0 +1,102 @@
+# 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 ts=4 :