dhcpleased and ifstated

[Christer Solskogen]

Now that dhclient is soon to be gone, I wanted to switch to dhcpleased. But
I do have a hard time understanding how I can get that to work together
with CARP and ifstated.
With dhclient, as soon as the master boots, the backup takes over and get
an ip address in an instant from my ISP, but dhcpleased does not. It don't
even get an ipaddress unless I run "dhcpleasectl -w 1 <interface>"
(dhcpleased runs in the background)

There's one hack that I had to run with dhclient, and that was that both
internet faced network cards needed to have the same mac address. So on the
backup machine I've spoofed it in hostname.re2.

# uname -a
OpenBSD tugs.antarctica.no 7.1 GENERIC.MP#604 amd64

# cat /etc/dhcpleased.conf
interface re2 {
        ignore dns
}

# cat /etc/ifstated.conf
carp_up = "carp0.link.up"
carp_down ="!carp0.link.up"
carp_init = "carp0.link.unknown"

init-state auto

state auto {
        run "sleep 6"
        if ($carp_up)
                set-state fw_master
        if !($carp_up)
                set-state fw_slave
}

state fw_master {
        init {
                run "route flush"
                run "arp -da"
                run "ifconfig re2 up"
                run "dhcpleased"
                run "pfctl -f /etc/pf.conf"
        }
        if ($carp_down)
                set-state fw_slave
}

state fw_slave {
        init {
                run "pkill dhcpleased"
                run "ifconfig re2 delete"
                run "arp -da"
                run "route flush"
                run "route add default 192.168.0.1"
        }

        if ($carp_up)
                set-state fw_master
}