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#!/bin/bash
# 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
}
# 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="$1" address="${2%%/*}" i
# We only handle IPv4 addresses
[[ ${address} != *.*.*.* ]] && return 1
# 0.0.0.0 isn't a valid address - and some lusers have configured this
[[ ${address} == "0.0.0.0" || ${address} == "0" ]] && return 1
# We need to bring the interface up to test
interface_up "${iface}"
if [[ -x /sbin/arping ]]; then
/sbin/arping -q -c 2 -w 3 -D -f -I "${iface}" "${address}" \
&>/dev/null || return 0
elif [[ -x /usr/sbin/arping2 ]]; then
for (( i=0; i<3; i++ )); do
/usr/sbin/arping2 -0 -c 1 -i "${iface}" "${address}" \
&>/dev/null && return 0
done
fi
return 1
}
# bool arping_start(char *iface)
#
# arpings a list of gateways
# If one is foung then apply it's configuration
arping_start() {
local iface="$1" gateways x conf i
interface_exists "${iface}" true || return 1
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 ${!gateways}; do
vebegin "${x}"
if arping_address_exists "${iface}" "${x}" ; then
for i in ${x//./ } ; do
if [[ ${#i} == "2" ]]; then
conf="${conf}0${i}"
elif [[ ${#i} == "1" ]]; then
conf="${conf}00${i}"
else
conf="${conf}${i}"
fi
done
veend 0
eoutdent
veinfo "Configuring ${iface} for ${x}"
configure_variables "${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_${ifvar}[@]"
config=( "${!t}" )
t="fallback_config_${ifvar}[@]"
fallback_config=( "${!t}" )
t="fallback_route_${ifvar}[@]"
fallback_route=( "${!t}" )
config_counter=-1
return 0
fi
veend 1
done
eoutdent
return 1
}
# vim:ts=4
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