/[baselayout]/trunk/net.Linux/arping.sh
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Contents of /trunk/net.Linux/arping.sh

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Revision 3075 - (show annotations) (download) (as text)
Tue Oct 30 11:39:19 2007 UTC (6 years, 8 months ago) by uberlord
File MIME type: text/x-sh
File size: 2897 byte(s)
You can now spoof the source address for arping as the third parameter in gateways_eth0 if you have arping2 installed, #180888.
1 # Copyright 2004-2007 Gentoo Foundation
2 # Distributed under the terms of the GNU General Public License v2
3
4 arping_depend() {
5 program /sbin/arping /usr/sbin/arping2
6 before interface
7 }
8
9 arping_address() {
10 local ip=${1%%/*} mac="$2" spoof="$3" foundmac= i= w= opts=
11
12 # We only handle IPv4 addresses
13 case "${ip}" in
14 0.0.0.0|0) return 1 ;;
15 *.*.*.*) ;;
16 *) return 1 ;;
17 esac
18
19 # We need to bring the interface up to test
20 _exists "${iface}" || return 1
21 _up "${iface}"
22
23 eval w=\$arping_wait_${IFVAR}
24 [ -z "${w}" ] && w=${arping_wait:-5}
25
26 if type arping2 >/dev/null 2>&1; then
27 [ -z "$(_get_inet_address)" ] && opts="${opts} -0"
28 [ -n "${spoof}" ] && opts="${opts} -S ${spoof}"
29 while [ ${w} -gt 0 -a -z "${foundmac}" ]; do
30 foundmac="$(arping2 ${opts} -r -c 1 -0 -i "${IFACE}" "${ip}" 2>/dev/null | \
31 sed -e 'y/abcdef/ABCDEF/')"
32 w=$((${w} - 1))
33 done
34 else
35 [ -z "$(_get_inet_address)" ] && opts="${opts} -D"
36
37 foundmac="$(arping -w "${w}" ${opts} -f -I "${IFACE}" "${ip}" 2>/dev/null | \
38 sed -n -e 'y/abcdef/ABCDEF/' -e 's/.*\[\([^]]*\)\].*/\1/p')"
39 fi
40 [ -z "${foundmac}" ] && return 1
41
42 if [ -n "${mac}" ] ; then
43 if [ "${mac}" != "${foundmac}" ] ; then
44 vewarn "Found ${ip} but MAC ${foundmac} does not match"
45 return 1
46 fi
47 fi
48
49 return 0
50 }
51
52 _arping_in_config() {
53 _get_array "config_${IFVAR}" | while read i; do
54 [ "${i}" = "arping" ] && return 1
55 done
56 return 1
57 }
58
59 arping_start() {
60 local gateways= x= conf= i=
61 einfo "Pinging gateways on ${IFACE} for configuration"
62
63 eval gateways=\$gateways_${IFVAR}
64 if [ -z "${gateways}" ] ; then
65 eerror "No gateways have been defined (gateways_${IFVAR}=\"...\")"
66 return 1
67 fi
68
69 eindent
70
71 for x in ${gateways}; do
72 local IFS=,
73 set -- ${x}
74 local ip=$1 mac=$2 spoof=$3 extra=
75 unset IFS
76
77 if [ -n "${mac}" ] ; then
78 mac="$(echo "${mac}" | tr '[:lower:]' '[:upper:]')"
79 extra="(MAC ${mac})"
80 fi
81
82 vebegin "${ip} ${extra}"
83 if arping_address "${ip}" "${mac}" "${spoof}" ; then
84 local IFS=.
85 for i in ${ip} ; do
86 if [ "${#i}" = "2" ] ; then
87 conf="${conf}0${i}"
88 elif [ "${#i}" = "1" ] ; then
89 conf="${conf}00${i}"
90 else
91 conf="${conf}${i}"
92 fi
93 done
94 unset IFS
95 [ -n "${mac}" ] && conf="${conf}_$(echo "${mac}" | sed -e 's/://g')"
96
97 eend 0
98 eoutdent
99 veinfo "Configuring ${IFACE} for ${ip} ${extra}"
100 _configure_variables ${conf}
101
102 # Call the system module as we've aleady passed it by ....
103 # And it *has* to be pre_start for other things to work correctly
104 system_pre_start
105
106 # Ensure that we have a valid config - ie arping is no longer there
107 local IFS="$__IFS"
108 for i in $(_get_array "config_${IFVAR}"); do
109 if [ "${i}" = "arping" ]; then
110 eend 1 "No config found for ${ip} (config_${conf}=\"...\")"
111 continue 2
112 fi
113 done
114 unset IFS
115
116 _load_config
117 return 0
118 fi
119 veend 1
120 done
121
122 eoutdent
123 return 1
124 }
125
126 # vim: set ts=4 :

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