On Tue, 2018-06-19 at 09:57 +0200, Peter Korsgaard wrote:
> > > > > > "Samuel" == Samuel Mendoza-Jonas <[email protected]> writes:
>
> Hi,
>
> > udhcpc6 will call the default script with the address set in the "ipv6"
> > variable. Set "ip" to this address if present.
>
> > Also from Rob, if handling a DHCPv6 address wait a moment for the IPv6
> > route to be configured; this doesn't come from DHCPv6 but rather the
> > IPv6 Router Advertisement (RA).
>
> > (wait for IPv6 route)
> > From: Robert Lippert <[email protected]>
> > Signed-off-by: Samuel Mendoza-Jonas <[email protected]>
> > ---
> > v2: Avoid bashisms
>
> > package/busybox/udhcpc.script | 14 ++++++++++++++
> > 1 file changed, 14 insertions(+)
>
> > diff --git a/package/busybox/udhcpc.script b/package/busybox/udhcpc.script
>
> You are sending this to the busybox list, but it looks to be a Buildroot
> patch?
Ugh, thank you for noticing - must have fat-fingered the --to option.
>
> > index ad110d3a7f..65114b6cd0 100755
>
> > --- a/package/busybox/udhcpc.script
> > +++ b/package/busybox/udhcpc.script
> > @@ -8,6 +8,16 @@ RESOLV_CONF="/etc/resolv.conf"
> > [ -e $RESOLV_CONF ] || touch $RESOLV_CONF
> > [ -n "$broadcast" ] && BROADCAST="broadcast $broadcast"
> > [ -n "$subnet" ] && NETMASK="netmask $subnet"
> > +[ -n "$ipv6" ] && ip="$ipv6/128"
>
> Why /128?
>
> I'm far from an IPv6 expert, but I take it this is for stateful DHCPv6,
> right? Please mention that in the commit message.
Yes this is stateful DHCPv6 - I'll update the commit message since I need to
send it to the correct list anyway :)
I can hardly claim the title of IPv6 expert either, but my understanding is
that a DHCPv6 server will not supply a subnet mask like a DHCPv4 server would,
but rather the address is implicitly a global '/128' address (and indeed udhcpc6
does not supply a subnet variable).
Cheers,
Sam
>
> > +
>
> > +wait_for_ipv6_default_route() {
> > + attempts=10
> > + while [ $attempts != 0 ] && [ -z "$(ip -6 route list | grep default)" ]
> ; do
> > + sleep 1
> > + attempts=$(($attempts-1))
> > + done
> > + [ $attempts = 0 ] && echo "failed to get default ipv6 route"
> > +}
>
> > case "$1" in
> > deconfig)
> > @@ -37,6 +47,10 @@ case "$1" in
> > /usr/sbin/avahi-autoipd -k $interface
> > fi
> > /sbin/ifconfig $interface $ip $BROADCAST $NETMASK
> > + if [ -n "$ipv6" ] ; then
> > + echo "waiting for default ipv6 route set"
> > + wait_for_ipv6_default_route
> > + fi
>
> > if [ -n "$router" ] ; then
> > echo "deleting routers"
> > --
> > 2.17.1
>
> > _______________________________________________
> > busybox mailing list
> > [email protected]
> > http://lists.busybox.net/mailman/listinfo/busybox
>
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