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# 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 arping_depend(void)
#
# Sets up the dependancies for the module
arping_depend() {
functions interface_exists interface_up
}
# bool arping_check_installed(void)
#
# Returns 0 if arping or arping2 is installed, otherwise 1
arping_check_installed() {
[[ -x /sbin/arping || -x /usr/sbin/arping2 ]] && return 0
if ${1:-false}; then
eerror "For arping support emerge net-misc/iputils or net-analyzer/arping"
fi
return 1
}
# void arping_sleep(char *interface)
#
# Allows the interface to settle on the LAN - normally takes around 3 seconds
# This requires the use of a global variable, ARPING_SLEPT
arping_sleep() {
local iface="$1"
[[ ${ARPING_SLEPT} == "1" ]] && return
local ifvar="$(bash_variable "${iface}")"
local s="arping_sleep_${ifvar}"
s="${!s}"
if [[ -z ${s} ]] ; then
s="${arping_sleep}"
s="${s:-1}"
fi
sleep "${s}"
ARPING_SLEPT="1"
}
# bool arping_address_exists(char *interface, char *address)
#
# Returns 0 if the address on the interface responds to an arping
# 1 if not - packets defaults to 1
# If neither arping (net-misc/iputils) or arping2 (net-analyzer/arping)
# is installed then we return 1
arping_address_exists() {
local iface="$1" ip="${2%%/*}" mac="$3" foundmac= i= w=
# We only handle IPv4 addresses
[[ ${ip} != *.*.*.* ]] && return 1
# 0.0.0.0 isn't a valid address - and some lusers have configured this
[[ ${ip} == "0.0.0.0" || ${ip} == "0" ]] && return 1
# We need to bring the interface up to test
interface_exists "${iface}" || return 1
interface_up "${iface}"
arping_sleep
local ifvar="$(bash_variable "${iface}")"
w="arping_wait_${ifvar}"
w="${!w}"
[[ -z ${w} ]] && w="${arping_wait:-3}"
if [[ -x /sbin/arping ]] ; then
foundmac="$(arping -c 2 -w "${w}" -D -f -I "${iface}" \
"${ip}" 2>/dev/null \
| sed -n 's/.*\[\([^]]*\)\].*/\U\1/p')"
elif [[ -x /usr/sbin/arping2 ]] ; then
for (( i=0; i<w; i++ )) ; do
foundmac="$(arping2 -r -0 -c 1 -i "${iface}" \
"${ip}" 2>/dev/null)"
if [[ $? == "0" ]] ; then
foundmac="$(echo "${foundmac}" \
| tr '[:lower:]' '[:upper:]')"
break
fi
foundmac=
done
fi
[[ -z ${foundmac} ]] && return 1
if [[ -n ${mac} ]] ; then
if [[ ${mac} != "${foundmac}" ]] ; then
vewarn "Found ${ip} but MAC ${foundmac} does not match"
return 1
fi
fi
return 0
}
# bool arping_start(char *iface)
#
# arpings a list of gateways
# If one is foung then apply it's configuration
arping_start() {
local iface="$1" gateways x conf i
local ifvar="$(bash_variable "${iface}")"
einfo "Pinging gateways on ${iface} for configuration"
gateways="gateways_${ifvar}[@]"
if [[ -z "${!gateways}" ]] ; then
eerror "No gateways have been defined (gateways_${ifvar}=( \"...\"))"
return 1
fi
eindent
for x in ${!gateways}; do
local -a a=( ${x//,/ } )
local ip="${a[0]}" mac="${a[1]}" extra=
if [[ -n ${mac} ]] ; then
mac="$(echo "${mac}" | tr '[:lower:]' '[:upper:]')"
extra="(MAC ${mac})"
fi
vebegin "${ip} ${extra}"
if arping_address_exists "${iface}" "${ip}" "${mac}" ; then
for i in ${ip//./ } ; do
if [[ ${#i} == "2" ]] ; then
conf="${conf}0${i}"
elif [[ ${#i} == "1" ]] ; then
conf="${conf}00${i}"
else
conf="${conf}${i}"
fi
done
[[ -n ${mac} ]] && conf="${conf}_${mac//:/}"
veend 0
eoutdent
veinfo "Configuring ${iface} for ${ip} ${extra}"
configure_variables "${iface}" "${conf}"
# Call the system module as we've aleady passed it by ....
# And it *has* to be pre_start for other things to work correctly
system_pre_start "${iface}"
t="config_${ifvar}[@]"
# Only return if we HAVE a config that doesn't include
# arping to avoid infinite recursion.
if [[ " ${!t} " != *" arping "* ]] ; then
config=( "${!t}" )
t="fallback_config_${ifvar}[@]"
fallback_config=( "${!t}" )
t="fallback_route_${ifvar}[@]"
fallback_route=( "${!t}" )
config_counter=-1
return 0
fi
fi
veend 1
done
eoutdent
return 1
}
# vim: set ts=4 :
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