108 lines
2.5 KiB
Bash
Executable File
108 lines
2.5 KiB
Bash
Executable File
#!/bin/rc
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# ipv6on [netdir ndbfile [gwv4]] - configure an interface for ipv6,
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# once ipv4 is configured. use ipv6 address from ndb if present,
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# else do stateless-autoconfiguration (SLAC).
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if (! ~ $#* 0 2 3) {
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echo usage: $0 '[netdir ndbfile [gw-v4-name]]' >[1=2]
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exit usage
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}
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rfork e
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if (~ $#* 0) {
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netdir=/net
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ndbf=/lib/ndb/local
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gw=`{ndb/ipquery sys $sysname ipgw | sed 's/ipgw=//'}
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}
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if not {
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netdir=$1
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ndbf=$2
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if (~ $#* 2)
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# gw=()
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gw=`{ndb/ipquery sys $sysname ipgw | sed 's/ipgw=//'}
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if not
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gw=$3
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}
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if (~ $netdir /net) {
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xsfx=()
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xdir=()
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}
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if not {
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xsfx=(-x `{echo $netdir | sed 's;^/net;;'})
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xdir=(-x $netdir)
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}
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fn nonnil { # variable
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if (~ $#$1 0) {
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echo ipv6on: no ip for $1 >[1=2]
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exit no-ip
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}
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if (! ~ $#$1 1) {
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echo ipv6on: multiple ips for $1 >[1=2]
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exit multiple-ips
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}
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}
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#
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# configure v6 for link-local addresses (fe80::) & multicast (ff02::).
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# accept router advertisements.
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#
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if (! ip/ipconfig -6 $xdir ether $netdir/ether?)
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exit 'ipconfig -6 failed'
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ip/ipconfig $xdir ether $netdir/ether? ra6 recvra 1
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# lookup any v6 address for me in ndb
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mev6=`{ndb/query -f $ndbf sys $sysname ipv6}
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if (~ $#sysname 0 || ~ $sysname '')
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mev6=`{ndb/query -f $ndbf sys $sysname ip | grep :}
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# for testing
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mylnk=`{ip/linklocal `{cat $netdir/ether?/addr}}
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nonnil mylnk
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#
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# have gateway? try to map to a v6 address; get eui-64 of v4's mac
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#
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if (~ $#gw 1) {
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if (~ $gw [0-9]*.[0-9]*.[0-9]*.[0-9]*) # is it v4?
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gwv4 = $gw
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if (~ $#gwv4 0 || ~ $gwv4 '')
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gwv4=`{ndb/query -f $ndbf sys $gw ip}
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gwv6=`{ndb/query -f $ndbf sys $gw ipv6}
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if (! ~ $#gwv4 0) { # have v4 gateway?
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# echo ping gw $gwv4...
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# load arp cache with gw mac
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ip/ping -qn 3 $netdir/icmp!$gwv4 >/dev/null >[2=1] &
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sleep 1 # wait briefly for ping
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# get v4 gateway's mac
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gweth=`{grep '* '^$gwv4^' ' $netdir/arp | awk '{print $4}' }
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nonnil gweth >[2]/dev/null # don't frighten users
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gwlnk=`{ip/linklocal $gweth} # get mac's eui-64
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nonnil gwlnk >[2]/dev/null
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}
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}
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nonnil mev6
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#
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# configure my global v6 addresses
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#
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v6mask=`{ndb/ipquery ip $mev6 ipmask}
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ip/ipconfig $xdir ether $netdir/ether? add $mev6 $v6mask
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ip/ipconfig $xdir loopback /dev/null add $mev6 /128
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#
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# have gateway? find its v6 address and make it our default route
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#
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if (~ $#gw 1) {
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if (~ $#gwv6 0 || ~ $gwv6 '') {
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if (~ $#gwlnk 0 || ~ $gwlnk '')
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gwv6=`{ip/linklocal $gweth}
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if not
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gwv6=$gwlnk
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}
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nonnil gwv6
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# add default v6 route to v6 addr of v4 gw
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echo add :: /0 $gwv6 >$netdir/iproute # need not be link-local
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}
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exit ''
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