plan9fox/rc/bin/ipv6on

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#!/bin/rc
# ipv6on [netdir ndbfile [gwv4]] - configure an interface for ipv6,
# once ipv4 is configured.
if (! ~ $#* 0 2 3) {
echo usage: $0 '[netdir ndbfile [gw-v4-name]]' >[1=2]
exit usage
}
rfork e
if (~ $#* 0) {
netdir=/net
ndbf=/lib/ndb/local
gw=`{ndb/ipquery sys $sysname ipgw | sed 's/ipgw=//'}
}
if not {
netdir=$1
ndbf=$2
if (~ $#* 2)
# gw=()
gw=`{ndb/ipquery sys $sysname ipgw | sed 's/ipgw=//'}
if not
gw=$3
}
if (~ $netdir /net) {
xsfx=()
xdir=()
}
if not {
xsfx=(-x `{echo $netdir | sed 's;^/net;;'})
xdir=(-x $netdir)
}
fn nonnil { # variable
if (~ $#$1 0) {
echo no ip for $1
exit no-ip
}
if (! ~ $#$1 1) {
echo multiple ips for $1
exit multiple-ips
}
}
devdir=`{awk '/^device/{print $2}' $netdir/ipifc/*/status | grep -v /dev/null}
nonnil devdir
devtype=pkt
if(~ $devdir *ether*)
devtype=ether
#
# configure v6 for link-local addresses (fe80::) & multicast (ff02::)
#
if (! ip/ipconfig -6 $xdir $devtype $devdir)
exit 'ipconfig -6 failed'
ip/ipconfig $xdir $devtype $devdir ra6 recvra 1
mev6=`{ndb/query -f $ndbf sys $sysname ipv6 | grep :}
if (~ $#mev6 0)
mev6=`{ndb/query -mf $ndbf sys $sysname ip | grep :}
# mev4=`{ndb/query -f $ndbf sys $sysname ip | grep -v :}
# for testing
if(~ $devtype ether){
mylnk=`{ip/linklocal `{cat $devdir/addr}}
nonnil mylnk
}
if (~ $#gw 1) {
if (~ $gw [0-9]*.[0-9]*.[0-9]*.[0-9]*)
gwv4=$gw
if (~ $#gwv4 0)
gwv4=`{ndb/query -f $ndbf sys $gw ip | grep -v :}
if (~ $gw *:*)
gwv6=$gw
if (~ $#gwv6 0)
gwv6=`{ndb/query -f $ndbf sys $gw ipv6 | grep :}
if (~ $#gwv6 0)
gwv6=`{ndb/query -f $ndbf sys $gw ip | grep :}
if (~ $#gwv6 0) {
if (~ $#gwv4 1) {
# echo ping gw $gwv4...
# load arp cache with gw mac
ip/ping -qn 3 $netdir/icmp!$gwv4 >/dev/null >[2=1] &
sleep 1 # wait for ping
gweth=`{grep '* '^$gwv4^' ' $netdir/arp | awk '{print $4}' }
nonnil gweth
gwlnk=`{ip/linklocal $gweth}
nonnil gwlnk
gwv6=$gwlnk
}
}
}
nonnil mev6
#
# configure my global v6 addresses
#
ip/ipconfig $xdir $devtype $devdir add $mev6 /64
ip/ipconfig $xdir loopback /dev/null add $mev6 /128
if (~ $#gwv6 1) {
#
# add default v6 route to v6 addr of v4 gw
#
echo add :: /0 $gwv6 >$netdir/iproute # need not be link-local
}
exit ''