-#! /bin/bash
+#! /bin/sh
+# SPDX-License-Identifier: GPL-2.0
CheckForwarding () {
local sbase fwd
fwd=0
if [ -d $sbase ]; then
for dir in $sbase/*/forwarding; do
- fwd=$[$fwd + `cat $dir`]
+ fwd=$(( fwd + $(cat "$dir") ))
done
else
fwd=2
fi
pfx="$ipaddr peer $peer"
else
+ if [ "$ipaddr" = "" ]; then
+ echo "Missing IP address argument." 1>&2
+ exit 1
+ fi
if [ "$pfxlen" = "" ]; then
ABCMaskLen $ipaddr
pfxlen=$?
arping -q -A -c 1 -I $dev $ipaddr
noarp=$?
( sleep 2 ;
- arping -q -U -c 1 -I $dev $ipaddr ) >& /dev/null </dev/null &
+ arping -q -U -c 1 -I $dev $ipaddr ) >/dev/null 2>&1 </dev/null &
-ip route add unreachable 224.0.0.0/24 >& /dev/null
-ip route add unreachable 255.255.255.255 >& /dev/null
-if [ `ip link ls $dev | grep -c MULTICAST` -ge 1 ]; then
- ip route add 224.0.0.0/4 dev $dev scope global >& /dev/null
+ip route add unreachable 224.0.0.0/24 >/dev/null 2>&1
+ip route add unreachable 255.255.255.255 >/dev/null 2>&1
+if [ "`ip link ls $dev | grep -c MULTICAST`" -ge 1 ]; then
+ ip route add 224.0.0.0/4 dev $dev scope global >/dev/null 2>&1
fi
if [ $fwd -eq 0 ]; then