{% set ip4hex = item.value.ipv4_network | ipaddr('net') | ipaddr(magic) | ipaddr('address') | ip4_hex() -%}
{% set mac = '0201' + ip4hex -%}
#
# {{ ansible_managed }}
#
auto {{ item.key }}BAT
iface {{ item.key }}BAT
    hwaddress {{ mac | hwaddr('linux') }}
    batman-ifaces {{ item.key }}0 {{ item.key }}VPN {{ item.key }}igVPN
    batman-hop-penalty {{ item.value.batman.hop_penalty }}
    post-up /usr/sbin/batctl -m $IFACE it {{ item.value.batman.it }}
    post-up /usr/sbin/batctl -m $IFACE gw {{ item.value.batman.gw }}
    post-up /usr/sbin/batctl -m $IFACE mm {{ item.value.batman.mm }}
    post-up /usr/sbin/batctl -m $IFACE dat {{ item.value.batman.dat }}