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