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 {{ lookup('vars', 'gw_mac_' + inventory_hostname.split('.')[1]) }} up"
        # flush routes and renew lease
        run "/sbin/route -qn flush"
        run "/usr/sbin/dhcpleasectl vio1"
        # reset firewall rules
        run "sleep 5 ; pfctl -f /etc/pf.conf"
    }
    if $if_carp_down {
        set-state backup
    }
}

state backup {
    init {
        # bring down interface and reset mac
        run "/sbin/ifconfig vio1 delete lladdr {{ lookup('vars', 'gw_mac_' + inventory_hostname.split('.')[1]) }} 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"
{% elif inventory_hostname == "dna-gw03.lan.foo.sh" %}
        run "/sbin/route -qn add default 172.20.30.3"
{% elif inventory_hostname == "dna-gw04.lan.foo.sh" %}
        run "/sbin/route -qn add default 172.20.30.2"
{% endif %}
    }
    if $if_carp_up {
        set-state master
    }
}