init-state auto

if_carp_up="carp1.link.up"
if_carp_down="carp1.link.down"

state auto {
    if $if_carp_up {
        set-state master
    }
    if $if_carp_down {
        set-state backup
    }
}

state master {
    init {
        # spoof mac to keep dhcp lease in sync with both gw's
        run "/sbin/ifconfig vio1 lladdr {{ gw_home_mac }} up"
        # flush routes and run dhclient and dhcpcd
        run "/sbin/route -qn flush"
        run "/sbin/dhclient vio1"
        #run "/sbin/rcctl restart dhcpcd > /dev/null"
        # reset firewall rules
        run "sleep 5 ; pfctl -f /etc/pf.conf"
    }
    if $if_carp_down {
        set-state backup
    }
}

state backup {
    init {
        # kill dhclient (TODO: better command for this)
        run "pkill -9 dhclient"
        # bring down interface and reset mac
        run "/sbin/ifconfig vio1 delete lladdr {{ gw_home_mac }} down"
        # flush routes and fix default route
        run "/sbin/route -qn flush"
{% if inventory_hostname == "dna-gw01.home.foo.sh" %}
        run "/sbin/route -qn add default 172.20.21.2"
{% elif inventory_hostname == "dna-gw02.home.foo.sh" %}
        run "/sbin/route -qn add default 172.20.21.1"
{% endif %}
    }
    if $if_carp_up {
        set-state master
    }
}