rcscripts/net.modules.d/macchanger

#!/bin/bash
# Copyright (c) 2004-2005 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

# Contributed by Roy Marples (uberlord@gentoo.org)

# char* macchanger_provides(void)
#
# Returns a string to change module definition for starting up
macchanger_provides() {
        echo "macchanger"
}

# void macchanger_depend(void)
#
# Sets up the dependancies for the module
macchanger_depend() {
        before macnet
}

# bool macchanger_check_installed(void)
#
# macchanger is always installed as an interface can change to a specific
# mac address, and an interface is always installed
macchanger_check_installed() {
        return 0
}

# bool macchanger_check_depends(void)
#
# Checks to see if we have the needed functions
macchanger_check_depends() {
        local f

        for f in interface_get_mac_address interface_set_mac_address; do
                [[ $( type -t "${f}" ) == "function" ]] && continue
                eerror "macchanger: missing required function ${f}\n"
                return 1
        done

        return 0
}

# 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" )

        eval mac=\"\$\{mac_${ifvar}\}\"
        [[ -z ${mac} ]] && return 0

        interface_exists "${iface}" true || return 1

        ebegin "Changing MAC address of ${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

        # The interface needs to be up for macchanger to work most of the time
        interface_down "${iface}"

        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:ts=4
1	#!/bin/bash
2	# Copyright (c) 2004-2005 Gentoo Foundation
3	# Distributed under the terms of the GNU General Public License v2
4
5	# Contributed by Roy Marples (uberlord@gentoo.org)
6
7	# char* macchanger_provides(void)
8	#
9	# Returns a string to change module definition for starting up
10	macchanger_provides() {
11	echo "macchanger"
12	}
13
14	# void macchanger_depend(void)
15	#
16	# Sets up the dependancies for the module
17	macchanger_depend() {
18	before macnet
19	}
20
21	# bool macchanger_check_installed(void)
22	#
23	# macchanger is always installed as an interface can change to a specific
24	# mac address, and an interface is always installed
25	macchanger_check_installed() {
26	return 0
27	}
28
29	# bool macchanger_check_depends(void)
30	#
31	# Checks to see if we have the needed functions
32	macchanger_check_depends() {
33	local f
34
35	for f in interface_get_mac_address interface_set_mac_address; do
36	[[ $( type -t "${f}" ) == "function" ]] && continue
37	eerror "macchanger: missing required function ${f}\n"
38	return 1
39	done
40
41	return 0
42	}
43
44	# bool macchanger_pre_start(char *iface)
45	#
46	# Configures the MAC address for iface
47	macchanger_pre_start() {
48	# We don't change MAC addresses from background
49	${IN_BACKGROUND} && return 0
50
51	local iface="$1" mac opts ifvar=$( bash_variable "$1" )
52
53	eval mac=\"\$\{mac_${ifvar}\}\"
54	[[ -z ${mac} ]] && return 0
55
56	interface_exists "${iface}" true \|\| return 1
57
58	ebegin "Changing MAC address of ${iface}"
59
60	mac=$( echo "${mac}" \| tr '[:upper:]' '[:lower:]' )
61	case "${mac}" in
62	# specific mac-addr, i wish there were a shorter way to specify this
63	[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])
64	# We don't need macchanger to change to a specific mac address
65	interface_set_mac_address "${iface}" "${mac}"
66	eend "$?"
67	if [[ $? == "0" ]]; then
68	mac=$( interface_get_mac_address "${iface}" )
69	eindent
70	einfo "changed to ${mac}"
71	eoutdent
72	return 0
73	fi
74	;;
75
76	# increment MAC address, default macchanger behavior
77	increment) opts="${opts}" ;;
78
79	# randomize just the ending bytes
80	random-ending) opts="${opts} -e" ;;
81
82	# keep the same kind of physical layer (eg fibre, copper)
83	random-samekind) opts="${opts} -a" ;;
84
85	# randomize to any known vendor of any physical layer type
86	random-anykind) opts="${opts} -A" ;;
87
88	# fully random bytes
89	random-full) opts="${opts} -r" ;;
90
91	# default case is just to pass on all the options
92	*) opts="${opts} ${mac}" ;;
93	esac
94
95	if [[ ! -x /sbin/macchanger ]]; then
96	eerror "For changing MAC addresses, emerge net-analyzer/macchanger"
97	return 1
98	fi
99
100	# The interface needs to be up for macchanger to work most of the time
101	interface_down "${iface}"
102
103	mac=$( /sbin/macchanger ${opts} "${iface}" \
104	\| sed -n -e 's/^Faked MAC:.\<\(..:..:..:..:..:..\)\>./\U\1/p' )
105
106	# Sometimes the interface needs to be up ....
107	if [[ -z ${mac} ]]; then
108	interface_up "${iface}"
109	mac=$( /sbin/macchanger ${opts} "${iface}" \
110	\| sed -n -e 's/^Faked MAC:.\<\(..:..:..:..:..:..\)\>./\U\1/p' )
111	fi
112
113	if [[ -z ${mac} ]]; then
114	eend 1 "Failed to set MAC address"
115	return 1
116	fi
117
118	eend 0
119	eindent
120	einfo "changed to ${mac}"
121	eoutdent
122
123	return 0 #important
124	}
125
126	# vim:ts=4