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ae665a522b
Go through source files and remove all trailing whitespace Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
150 lines
3.0 KiB
Bash
150 lines
3.0 KiB
Bash
#! /bin/bash
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CheckForwarding () {
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local sbase fwd
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sbase=/proc/sys/net/ipv4/conf
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fwd=0
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if [ -d $sbase ]; then
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for dir in $sbase/*/forwarding; do
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fwd=$[$fwd + `cat $dir`]
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done
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else
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fwd=2
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fi
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return $fwd
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}
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RestartRDISC () {
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killall -HUP rdisc || rdisc -fs
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}
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ABCMaskLen () {
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local class;
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class=${1%%.*}
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if [ "$1" = "" -o $class -eq 0 -o $class -ge 224 ]; then return 0
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elif [ $class -ge 224 ]; then return 0
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elif [ $class -ge 192 ]; then return 24
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elif [ $class -ge 128 ]; then return 16
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else return 8; fi
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}
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label="label $1"
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ldev="$1"
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dev=${1%:*}
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if [ "$dev" = "" -o "$1" = "help" ]; then
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echo "Usage: ifcfg DEV [[add|del [ADDR[/LEN]] [PEER] | stop]" 1>&2
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echo " add - add new address" 1>&2
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echo " del - delete address" 1>&2
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echo " stop - completely disable IP" 1>&2
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exit 1
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fi
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shift
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CheckForwarding
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fwd=$?
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if [ $fwd -ne 0 ]; then
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echo "Forwarding is ON or its state is unknown ($fwd). OK, No RDISC." 1>&2
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fi
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deleting=0
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case "$1" in
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add) shift ;;
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stop)
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if [ "$ldev" != "$dev" ]; then
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echo "Cannot stop alias $ldev" 1>&2
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exit 1;
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fi
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ip -4 addr flush dev $dev $label || exit 1
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if [ $fwd -eq 0 ]; then RestartRDISC; fi
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exit 0 ;;
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del*)
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deleting=1; shift ;;
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*)
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esac
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ipaddr=
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pfxlen=
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if [ "$1" != "" ]; then
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ipaddr=${1%/*}
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if [ "$1" != "$ipaddr" ]; then
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pfxlen=${1#*/}
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fi
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if [ "$ipaddr" = "" ]; then
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echo "$1 is bad IP address." 1>&2
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exit 1
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fi
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fi
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shift
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peer=$1
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if [ "$peer" != "" ]; then
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if [ "$pfxlen" != "" -a "$pfxlen" != "32" ]; then
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echo "Peer address with non-trivial netmask." 1>&2
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exit 1
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fi
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pfx="$ipaddr peer $peer"
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else
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if [ "$ipaddr" = "" ]; then
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echo "Missing IP address argument." 1>&2
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exit 1
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fi
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if [ "$pfxlen" = "" ]; then
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ABCMaskLen $ipaddr
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pfxlen=$?
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fi
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pfx="$ipaddr/$pfxlen"
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fi
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if [ "$ldev" = "$dev" -a "$ipaddr" != "" ]; then
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label=
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fi
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if [ $deleting -ne 0 ]; then
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ip addr del $pfx dev $dev $label || exit 1
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if [ $fwd -eq 0 ]; then RestartRDISC; fi
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exit 0
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fi
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if ! ip link set up dev $dev ; then
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echo "Error: cannot enable interface $dev." 1>&2
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exit 1
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fi
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if [ "$ipaddr" = "" ]; then exit 0; fi
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if ! arping -q -c 2 -w 3 -D -I $dev $ipaddr ; then
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echo "Error: some host already uses address $ipaddr on $dev." 1>&2
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exit 1
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fi
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if ! ip address add $pfx brd + dev $dev $label; then
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echo "Error: failed to add $pfx on $dev." 1>&2
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exit 1
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fi
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arping -q -A -c 1 -I $dev $ipaddr
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noarp=$?
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( sleep 2 ;
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arping -q -U -c 1 -I $dev $ipaddr ) >& /dev/null </dev/null &
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ip route add unreachable 224.0.0.0/24 >& /dev/null
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ip route add unreachable 255.255.255.255 >& /dev/null
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if [ `ip link ls $dev | grep -c MULTICAST` -ge 1 ]; then
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ip route add 224.0.0.0/4 dev $dev scope global >& /dev/null
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fi
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if [ $fwd -eq 0 ]; then
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if [ $noarp -eq 0 ]; then
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ip ro append default dev $dev metric 30000 scope global
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elif [ "$peer" != "" ]; then
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if ping -q -c 2 -w 4 $peer ; then
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ip ro append default via $peer dev $dev metric 30001
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fi
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fi
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RestartRDISC
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fi
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exit 0
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