#!/bin/sh
set -e

batctl meshif ${BATMAN_INTERFACE} interface create
ip link set ${BATMAN_INTERFACE} up

# setup ips
if [ "${BATMAN_IPV4}" ] ; then
    ip -4 addr add ${BATMAN_IPV4} dev ${BATMAN_INTERFACE}
fi
if [ "${BATMAN_BRIDGE_IPV6}" ] ; then
    ip -6 addr add ${BATMAN_IPV6} dev ${BATMAN_INTERFACE}
fi

# mark node as dhcp server
batctl meshif ${BATMAN_INTERFACE} gw server ${BATMAN_LIMIT_DOWNLOAD}Mbit/${BATMAN_LIMIT_UPLOAD}Mbit

if [ "${WIREGUARD_CONFIG}" ] ; then \
    nft add table ip nat || true
    nft add chain 'ip nat POSTROUTING { type nat hook postrouting priority srcnat; policy accept; }' || true
    nft add rule nat POSTROUTING counter masquerade || true
    nft add table ip6 nat || true
    nft add chain 'ip6 nat POSTROUTING { type nat hook postrouting priority srcnat; policy accept; }' || true
    nft add rule ip6 nat POSTROUTING counter masquerade || true

    # remove dns defintion, because resolv.conf is write protected in the container
    egrep -v '^\s*DNS\s*=' ${WIREGUARD_CONFIG} >/etc/wireguard/${WIREGUARD_INTERFACE}.conf
    wg-quick up ${WIREGUARD_INTERFACE}
    ip rule add iif ${BATMAN_INTERFACE} table 5000
fi

cat >/etc/radvd.conf <<EOF
interface ${RADVD_INTERFACE} {
  AdvSendAdvert on;
  IgnoreIfMissing on;
EOF

[ "${RADVD_ADV_MANAGEMENT_FLAG}" ] && \
  echo "  AdvManagedFlag ${RADVD_ADV_MANAGEMENT_FLAG};" >>/etc/radvd.conf
[ "${RADVD_MTU}" ] && \
  echo "  AdvLinkMTU ${RADVD_MTU};" >>/etc/radvd.conf
[ "${RADVD_SOURCE_LL_ADDRESS}" ] && \
  echo "  AdvSourceLLAddress ${RADVD_SOURCE_LL_ADDRESS};" >>/etc/radvd.conf
[ "${RADVD_OTHER_CONFIG_FLAG}" ] && \
  echo "  AdvOtherConfigFlag ${RADVD_OTHER_CONFIG_FLAG};" >>/etc/radvd.conf
  
cat >>/etc/radvd.conf <<EOF
  prefix ${RADVD_PREFIX}
  {
    AdvOnLink on;
    AdvAutonomous on;
    AdvRouterAddr on;
    DeprecatePrefix on;
  };
};
EOF

/usr/sbin/radvd --config=/etc/radvd.conf --logmethod=stderr --nodaemon