#!/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 ''