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Revision 860 - (show annotations) (download)
Mon Jan 17 15:40:32 2005 UTC (9 years, 7 months ago) by uberlord
File size: 2744 byte(s)
all modules should now check interface existance correctly - fixes #76385

1 # macchanger module for net-scripts
2 # Version 1.0.3
3 # Copyright (c) 2004 Gentoo Foundation
4 # Distributed under the terms of the GNU General Public License V2
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 interface wireless
19 }
20
21 # bool macchanger_check_installed(void)
22 #
23 # Returns 1 if macchanger is installed, otherwise 0
24 macchanger_check_installed() {
25 [[ -x /sbin/macchanger ]] && return 0
26 ${1:-false} && eerror "For changing MAC addresses, emerge net-analyzer/macchanger"
27 return 1
28 }
29
30 # bool macchanger_check_depends(void)
31 #
32 # Checks to see if we have the needed functions
33 macchanger_check_depends() {
34 local f
35
36 for f in interface_variable interface_get_mac_address; do
37 [[ $( type -t ${f} ) == function ]] && continue
38 eerror "macchanger: missing required function ${f}\n"
39 return 1
40 done
41
42 return 0
43 }
44
45 # bool macchanger_pre_start(char *iface)
46 #
47 # Configures the MAC address for iface
48 macchanger_pre_start() {
49 local iface=${1} mac opts
50
51 interface_exists ${iface} true || return 1
52
53 local ifvar=$( interface_variable ${1} )
54
55 eval mac=\"\$\{mac_${ifvar}\}\"
56 [[ -z ${mac} ]] && return 0
57
58 mac=$( echo ${mac} | tr '[:upper:]' '[:lower:]' )
59 case "${mac}" in
60 # specific mac-addr, i wish there were a shorter way to specify this
61 [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}" ;;
62
63 # increment MAC address, default macchanger behavior
64 increment) opts="${opts}" ;;
65
66 # randomize just the ending bytes
67 random-ending) opts="${opts} -e" ;;
68
69 # keep the same kind of physical layer (eg fibre, copper)
70 random-samekind) opts="${opts} -a" ;;
71
72 # randomize to any known vendor of any physical layer type
73 random-anykind) opts="${opts} -A" ;;
74
75 # fully random bytes
76 random-full) opts="${opts} -r" ;;
77
78 # default case is just to pass on all the options
79 *) opts="${opts} ${mac}" ;;
80 esac
81
82 # The interface needs to be up for macchanger to work most of the time
83 interface_down ${iface}
84
85 ebegin "Changing MAC address of ${iface}"
86 mac=$( /sbin/macchanger ${opts} ${iface} 2>/dev/null | awk '/Faked MAC:/ { print toupper($3) }' )
87
88 # Sometimes the interface needs to be up ....
89 if [[ -z ${mac} ]]; then
90 interface_up ${iface}
91 mac=$( /sbin/macchanger ${opts} ${iface} 2>/dev/null | awk '/Faked MAC:/ { print toupper($3) }' )
92 fi
93
94 if [[ -z ${mac} ]]; then
95 eend 1 "Failed to set MAC address"
96 return 1
97 fi
98
99 eend 0
100 eindent
101 einfo "changed to ${mac}"
102 eoutdent
103
104 return 0 #important
105 }

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